(19)
(11)EP 2 844 060 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
27.11.2019 Bulletin 2019/48

(21)Application number: 13784375.1

(22)Date of filing:  03.05.2013
(51)International Patent Classification (IPC): 
A01G 23/091(2006.01)
B27B 17/02(2006.01)
(86)International application number:
PCT/SE2013/000061
(87)International publication number:
WO 2013/165294 (07.11.2013 Gazette  2013/45)

(54)

GUIDE BAR CLAMPING ARRANGEMENT FOR A MOTOR SAW

FÜHRUNGSSCHIENENKLEMMANORDNUNG EINER MOTORSÄGE

AGENCEMENT DE SERRAGE DE GUIDE-CHAÎNE ASSOCIÉ À UNE SCIE À MOTEUR


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 03.05.2012 SE 1200261

(43)Date of publication of application:
11.03.2015 Bulletin 2015/11

(73)Proprietor: JPS Teknik AB
820 41 Färila (SE)

(72)Inventors:
  • SÖRELL, John, Peter
    S-820 41 Färila (SE)
  • FALK, Kurt, Gunnar
    S-824 52 Hudiksuall (SE)

(74)Representative: Noréns Patentbyrå AB 
Box 10198
100 55 Stockholm
100 55 Stockholm (SE)


(56)References cited: : 
EP-A1- 0 205 620
WO-A1-2014/001066
GB-A- 539 956
SE-C2- 518 366
US-A- 6 148 547
US-B1- 6 694 623
WO-A1-97/19794
DE-C1- 19 737 886
SE-C2- 518 366
US-A- 5 249 362
US-B1- 6 532 671
  
  • DATABASE WPI Section PQ, Week 198812 Thomson Scientific, London, GB; Class P63, AN 1988-082599 -& SU 1 329 966 A1 (KOZLOV ALEKSANDR V) 15 August 1987 (1987-08-15) & SU 1 329 966 A1 (KOZLOV ALEKSANDR V [SU]) 15 August 1987 (1987-08-15)
  
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


Description

TECHNICAL FIELD OF THE INVENTION



[0001] This invention refers to an arrangement of a motor saw according to the preamble of claim 1.

[0002] Such an arrangement is known from SU1329966A1.

[0003] With regard to motor saws in accordance with the present invention, they are all based on a motor saw in the form of a motor saw arrangement having a drive motor unit and a guide bar arrangement adapted to the drive motor unit, which with the assistance of a wedging or clamping arrangement can take either an activable position or an inactivable position.

[0004] The present invention is concentrated to a "coordinating arrangement" of the drive motor unit with the guide bar in a guide bar arrangement intended as a clamping (and/or loosening) arrangement for one end portion, the inner end portion or the end area of said guide bar, by indicating the existence of an arrangement between the guide bar and the chassis of the drive motor acting and for clamping the saw or guide bar or loosening the saw or guide bar against and away from the chassis, here abbreviatedly designated coordinating arrangement, as in the form of a mechanical means.

[0005] More specifically, the present invention is intended to be applied to a motor saw, wherein said motor saw with its chassis comprises a drive motor unit, the rotatable shaft of which is adapted to support a drive disc, such as a toothwheel, provided with teeth around the periphery of the drive disc, around which toothwheel a portion or section of an endless saw chain is adapted to run, which saw chain also is adapted to run with its remaining portions in such manner along the guide bar as to create a guide bar arrangement, in which the reminding portions of the saw chain are to run along tracks allotted to side edges directed away from the guide bar, and a relinking disc, such as a toothwheel or the like, allotted to the other (external) end portion of the guide bar driven by the translation movement of the saw chain.

[0006] The present invention is based on a motor saw arrangement having its drive motor unit adapted to support the guide bar arrangement over said coordinating arrangement adapted to the chassis for clamping the guide bar, said arrangement being adapted to be able to take an activable position in which the chassis included in the drive motor unit becomes solidly and fixedly anchored related to the guide bar in the guide bar arrangement or an inactivable position in which the chassis of the drive motor unit becomes loosely and freely related to the guide bar arrangement and its guide bar.

[0007] In this inactivable position, the guide bar is to be displaced from the drive motor unit and its chassis by a relative motion in a direction related to a plane through the guide bar so as thereby to release the guide bar from the drive motor unit and its chassis and thus to set forth during the mentioned inactivable position a guiding pat- tern to follow for removing the guide bar from the chassis, wherein said arrangement has been brought to its inactivable position by loosening said clamping means, and during this inactivable position of the arrangement loosening said saw chain from the guide bar and its relinking disc and displacing the guide bar with one of its ends facing the drive motor, i.e. its inner end portion, along a plane allotted to the guide bar and oriented through the side edges of the guide bar and out of the inactivated position of the clamping arrangement.

[0008] In the following description of the present invention the subsequent definitions have been utilized to advantage:
A motor saw comprises a drive motor unit which over an activated "coordinating arrangement" and/or an interrelated arrangement solidly supports a guide bar arrangement with an extended saw chain.

[0009] A drive motor unit is to comprise a chassis and said drive motor as well as a support plate anchored to the chassis and included in a clamping or coordinating arrangement.

[0010] A guide bar arrangement is intended to comprise a guide bar having a mounted saw chain running along the side edges of said guide bar, with the saw chain being controlled by tracks disposed along side edges directed away from each other by the guide bar, said guide bar arrangement exhibiting a relinking disc inside the other or external end area of said guide bar.

[0011] Guide bar concerns a unit where its external, second end area supports a relinking disc and its inner, first end area faces the drive motor unit and is designed for solid cooperation with an arrangement adapted for tightening or clamping the guide bar against the chassis.

[0012] A clamping arrangement is based on utilizing a support plate tightly related and anchored to the chassis of the drive motor unit and a clamping plate cooperating therewith and intended in an activable position to be able to cooperate clampingly with and to support the inner, first end area of the guide bar facing the drive motor unit by activating a clamping means between said clamping plate and said support plate and in an inactivable position releasing the clamping cooperation by loosening said clamping means.

[0013] A clamping unit is based on a unit which is intended to be able to tighten or clamp the interior area or first end area of the guide bar with the help of a displaceable clamping plate acting against a fixed support plate and utilizing a clamping means extending through one or two holes or notches in the clamping plate and loosening the clamping function in an inactive position by loosening the clamping means. Clamping means are adapted to cooperate with the support plate with a threading and to be permitted to pass freely through the clamping plate and normally consist of a threaded bolt or a nut corresponding to the threading.

[0014] Means extending (or slackening) the saw chain towards the guide bar have the purpose of displacing the guide bar arrangement from the drive motor unit and locking the guide bar arrangement relative to the chassis of the drive motor unit. These means are disposed displaceably forward and backward to extend or slacken the saw chain.

[0015] Coordinating arrangements have the purpose of defining a known clamping (loosening) arrangement which in an activable position can properly hold on to the drive motor unit and the guide bar arrangement with a clamping force and in an inactivated position without clamping force can release the guide bar from the drive unit by completely removing said clamping plate as a separate unit from the support plate.

[0016] Interrelated arrangement has the purpose of indicating, according to the present invention, a clamping arrangement or a clamping unit and its clamping means extending from said support plate and through said clamping plate, said arrangement in an activated position being intended to define an arrangement which in said activable position with a clamping force can properly hold the drive motor unit and guide bar arrangement and in an inactivable position without the clamping force can release the guide bar from the drive motor unit by displacing the clamping plate from the support plate at least a distance to a stop means exceeding the thickness of the guide bar arrangement but still remaining interrelated or linked together with each other for forming said arrangement which is open for receiving or laying open the inner first end area of the guide bar, where in a displacement between activated or inactivated positions is to be a displacement of said clamping plate.

[0017] The prior embodiment shown and described is to combine the clamping or interrelated arrangement with the means extending (or slackening) the saw chain towards the guide bar by using a piston-cylinder arrangement activating the support plate for the inner first area of the guide bar arrangement in a to and away directed movement oriented in a plane ("P") of the guide bar.

[0018] Known motor saw arrangements and their drive motor units to which their guide bar arrangements may be secured and released are for practical reasons divided into two categories in dependence of their application as hand operated motor saw arrangements having simple drive motor units and simple guide bar arrangements and vehicle related and remote controlled motor saw arrangements, respectively, having strong drive motor units and strong and rigid guide bar arrangements.

[0019] The present invention intends primarily to find its application in vehicle related and remote controlled motor saw arrangements, where the vehicle is in the form of a timber harvesting arrangement or equipment. The clamping arrangement or the coordinating arrangement and/or the clamping unit may expose an inactivated position, wherein the guide bar is to be freely related to the chassis of the drive motor unit and the guide bar may directly and in its plane ("P") be moved or displaced from its inner position, wherein the saw chain can be brought out of cooperation with the guide bar arrangement and from this inner position, by a displacement, remove the guide bar arrangement from the support plate related to the chassis of the drive motor unit.

[0020] In motor saw units or motor saw arrangements of the kind described above it is known to relate to the drive motor unit a means extending the saw chain, wherein said means in an inactivated position may displace the guide bar and its arrangement in a direction away from the drive motor unit by using one or more metal pins (as 6 mm in diameter), thus extending the saw chain.

[0021] It is previously known, especially in a harvesting arrangement or equipment, to rapidly activate the clamping arrangement from its activated (clamped) position to its inactivated (loosened) position or vice versa in an attempt to release the guide bar and in such released position turn said bar upside down or exchange one bar for a new one.

[0022] It has also been noted that specifically the end portion or end area of the guide bar facing the drive motor unit, the inner end area and inside of the clamping and coordinating arrangement create high and concentrated power forces and turning (torque) strains when the free end portion of the guide bar arrangement is subjected to a strong and/or short high rotational or torque bending factor ("M") active with in the plane ("P") allotted to the guide bar.

[0023] Particularly difficult concentrated forces appear when the inner end area is pro- vided with a long centrally oriented slit for clamping cooperation between a support plate and a clamping plate of the clamping arrangement. It has then turned out that this torque ("M") can result in a plastic deformation in its inner end portion. Compare here Figure 12. The inner end portion (2d) of the guide bar arrangement is thus to be able to act to clamp and without any rotational function act between the support plate surface and the clamping plate surface.

BACKGROUND OF THE INVENTION



[0024] Arrangements and structures related to the technical field mentioned above and having a function and being of a character which fulfils the requirements as proposed are known in the prior art in a plurality of different embodiments.

[0025] Thus it can be mentioned that harvesting arrangements or equipments of the relevant type which support its drive motor unit and to which unit a guide bar arrangement is easily applicable and easily separable over a clamping and coordinating arrangement are adapted to extend with their endless saw chain from a drive disc allotted to the drive motor unit, said drive disc ordinarily being shaped as a toothwheel, and the saw chain tracks along and around the guide bar to form the guide bar arrangement.

[0026] The drive motor unit comprises i.a. a means extending (or loosening) a saw chain towards the guide bar for enabling fastening (and loosening) the drive motor unit to and from the guide bar and in a clamping condition means to allow a limited displacement movement of the guide bar arrangement with regard to the drive motor unit, normally for extending the saw chain.

[0027] Motor saws and motor saw arrangements of the type belonging thereto are as a rule driven by a hydraulic circuit placed under an hydraulic overpressure and which over controllable hydraulic valves can feed a drive motor driven by hydraulic pressure within the drive motor unit with a controllable hydraulic flow and the hydraulic pressure which it requires for generating the necessary amount of power so that such motor saw may be driven under more or less maximized conditions.

[0028] Such maximized conditions are well developed in the field of tree and timber harvesting or logging, wherein the conditions refer i.a. to letting the saw chain operate in a maximized translation movement, such as 40 meters per second, and controlling the engagement pressure between the cutting teeth of the saw chain and a wooden material intended for being cut, primarily in the form of logs and timber, and wherein an adapted engagement pressure and a cutting capacity can be controlled by the momentary number of revolutions of the drive motor and its disc and choosing the diameter and number of teeth for the toothwheel driven by the drive motor unit, wherein said toothwheel is to be driven by a hydraulic motor, and selecting the volume of the driving motor and hence its number of revolutions dependent on the chosen maximized translation movement.

[0029] There are several different solutions on the market that are directed to the tensioning of the chain on the guide bar, where the guide bar has been adapted in different ways to more easily tension the chain without the need for removal of any parts. Such solutions have for example been provided in DE 19737886 C1. However, this document does not provide a solution where the guide bar can be completely detached and removed from the drive motor unit without the need of completely removing any other parts, such as for example bolts.

[0030] As an example of the background of technology and the technical field to which the present invention refers with regard to motor saws in general and particularly to motor saw arrangements or units may be mentioned the presence of a clamping and for coordinating arrangement between a drive motor unit and a guide bar arrangement adaptable to the drive motor unit and in which a unit and/or an arrangement are attached but easily removable from each other via said clamping and coordinating arrangement with its clamping means.

[0031] As an example of the background of technology and the technical field to which the present invention refers may be mentioned a guide bar arrangement having a specific shape of its inner end portion of the guide bar, which is shown and described in European Patent Application EP 0 993 767 B1.

[0032] Here a motor saw arrangement shown and described being designed with the inner first end portion or area of said guide bar (according to the following Figure 12) is not only provided with a centrally located slot (40), which extends partly along the guide bar, corresponding to known technology (according to Figure 2), but is also provided with two side-disposed guiding holes or slots for adapting a chosen extension of the saw chain along the guide bar over an arrangement extending the saw chain and its guide bar by on the one hand moving these slots towards the edge surface of the guide bar and furthermore shaping the center lines of these slots so that they connect to the direction of a central middle line of the slots and with slots opening symmetrically oriented to said edge portion.

[0033] A support plate and a clamping plate are here shaped to cover solely part of the central slot.

[0034] To the earlier standpoint of technology belong also the measures that are required to rapidly be able to inactivate the clamping arrangement and without a saw chain to loosen and turn around or replace one guide bar by another alternatively in connection therewith to initially replace a utilized saw chain and/or a guide bar by a new such one.

[0035] Different clamping arrangements have also been proposed, which have been formed such, that replacing of a guide bar arrangement and/or a guide bar can be carried out with simple means and having loose and separatable components, which might be lost in difficult terrain and/or snow during a replacement sequence.

[0036] Various clamping means have also been proposed, which in inactivable position will offer a guide bar movement in the direction from the drive motor unit, the chassis thereof and along a plane of the guide bar and its support plate.

[0037] Manual actuation of the tightening or clamping arrangements to inactivable or alternative activable positions have also been proposed, where the clamping arrangement can serve as a means extending the saw chain towards and along its guide bar.

[0038] Patent Publication US 5 709 254 A according to Figures 4 and 5 shows a chassis related arrangement with a support plate (106) and a clamping plate (104) as well as clamping and/or loosening means (a bolted joint).

[0039] It is specifically indicated that the guide bar (100) and particularly two blocks (104, 106) allotted to the illustrated arrangement can be displaced in active position for extending and/or slackening the saw chain over means intended for this, for example letting the saw chain extend along said guide bar.

[0040] The principle of this arrangement can be considered to imply that when the arrangement is disposed in activable position the end portion of the guide bar facing the chassis and attached by a bolted joint and being disposed in an inactive position, such as for replacement of the guide bar, there is a coordinated arrangement requiring that the clamping plate (104) be removed and displaced as a unit entirely from the chassis so that the guide bar is made free in such manner.

[0041] Thus, the clamping plate (104) must during its inactive position be entirely removed from the chassis as an independent unit.

[0042] In the inactivated position, i.e. a position in which the guide bar and saw chain have been removed from their attached position in the motor unit or chassis and where the guide bar with mounted and stretched saw chain is to be introduced into the arrangement to an activating and tight-holding position, at least the clamping plate (104) belonging to the arrangement and its means or bolt joint will exist in individual loose parts that may easily go lost.

[0043] Patent Publication US 3 870 125 A shows and describes a clamping arrangement that in a position illustrated in Figure 7 requires two bolts (28, 30) secured to the chassis, said bolts being adapted to support said guide bar by a within said end area formed slot (20) and where said clamping plate (42) is to clamp said guide bar and its mounted saw chain by using two nuts (34).

[0044] In said inactivated position such a coordinating arrangement requires that said clamping plate (42) and at least two nuts (34) are kept as separated easily lost parts.

[0045] Patent Publication GB 539956A shows and describes a clamping arrangement in the form of a coordinating arrangement having a clamping plate and a support plate, where screws (18) are adapted to be formed to fit key holes (17) in order to secure the inner area of the guide bar (8).

[0046] In an inactivated position this coordinating arrangement requires that at least the clamping plate is formed as a separate part.

[0047] Patent publication US 3 870 125 A shows and describes an arrangement having two separated clamping plates (7, 8), where one can be considered as a support plate and the other as a clamping plate with an intermediate guide bar (3) and in activated position the two plates (7, 8) and the guide bar (3) are clamped by nuts (10).

[0048] In inactivated position such a coordinating arrangement requires that at least one plate (8) and in any case two nuts (10) are in the form of loose, easily lost, parts.

[0049] Patent publication SE 518 366 C2 describes a guide bar for a motor saw, where the guide bar has been provided with a specific shape in the end that is to be fastened to the drive motor unit. This publication describes a possible solution to the same problem of detaching the guide bar without the need of completely removing any other parts. However, the solution provided, where the end of the guide bar is only pushed towards the bolts (22) will result in a less stable guide bar since there are no bolts going through the guide bar holding it securely in place. There are great forces that affects all parts of a motor saw in use and it is important that all parts are held firmly in place when the motor saw are used.

STATEMENT OF THE PRESENT INVENTION


TECHNICAL PROBLEM



[0050] Considering the earlier standpoint of technology as it has been described above it should therefore be seen as a technical problem to be able to set forth an arrangement and thereby to be able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required in an arrangement in motor saw equipment in accordance with the preamble of Claim 1 indicating the existence of a tightening, clamping and interrelating arrangement for a guide bar having a lower support plate, an upper clamping plate and a clamping means extending there between so that the guide bar and particularly the chassis allotted to the drive motor unit can cooperate definitely and anchored with the drive motor unit and wherein the arrangement rapidly can be changed from an active position to an inactive position or vice versa and apart from this can be adapted to be able to take up and stand up against bending stresses or torques at an inner end of the guide bar, its inner end portion and resulting from a rotary or torque force ("M") initiated in the other free end portion of the guide bar, such as when being driven in a cutting process.

[0051] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and requirements which will be necessary for allotting an arrangement for bringing a guide bar out of cooperation with its clamping or interrelating arrangement, wherein a support plate and a clamping plate allotted to an interlinking or interrelated arrangement for bringing the inner end portion of an intermediately lying inner end portion of a saw chain to an inactivable position, in which the clamping plate and/or the end portion in a first mode of motion can be displaced in a direction away from the support plate and in a second mode of motion, can displace said end portion of the guide bar along a plane ("P") allotted to said guide bar and out of the inactivated position of the interrelated arrangement.

[0052] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for indicating and suggesting an arrangement with its support plate to be adapted for a displacement initially during an inactivated position for said arrangement so as to let the width of the support plate primarily serve as a unit taking up bending forces and/or tension torque activated at the free end portion of the guide bar through static friction.

[0053] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for choosing, in an arrangement, a support plate solidly related to and anchored to the chassis, for said interrelated or linking together, alter- natively a clamping plate having two short outwardly directed (such as sidewardly directed, upwardly directed or downwardly directed) projections or studs in said support plate and/or clamping plate adapted for cooperation with individual recesses and a clamping means arranged inbetween said projections, as a bolt or nut with a threading which primarily clamps the clamping plate towards the support plate.

[0054] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for indicating and suggesting an arrangement related to a motor saw according to the preamble of claim 1, with a clamping and/or interrelated arrangement having a clamping plate and a clamping means and a support plate or the like which can initially be displaced during an inactivated position or said arrangement a distance away from said support plate, as a distance exceeding a chosen thickness of the guide bar unit, with the inner end area and/or said clamping plate within a first mode of motion being adapted to be displaced in a first direction from said support plate and with the guide bar unit within a succeeding second mode of motion being adapted to be displaced along a plane of the guide bar unit and out of its inactivated position for said arrangement.

[0055] More specifically the present invention discloses an interrelated arrangement and makes use of a rigid and anchored support plate and a displaceably oriented clamping plate along its clamping means in order to clamp the inner area of an intermediate guide bar to form an activated position or inactivated position.

[0056] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for indicating and suggesting a method and an arrangement where short outwardly directed (such as sidewardly directed, upwardly directed or downwardly directed) studs in the support plate and/or clamping plate having a high dimension corresponding to or at least are somewhat less than the thickness of the guide bar unit.

[0057] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for suggesting a method and an arrangement wherein said short projections or studs are allotted a circular cross section.

[0058] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for suggesting an arrangement, wherein a cross section or a diameter of at least one of the projections or studs can be chosen to 15 to 25 %, such as around 20 %, of the length of the support plate or the clamping plate, measured crosswise of the direction of the guide bar.

[0059] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for indicating an arrangement wherein the support plate and/or the clamping plate in an interrelated arrangement are shaped as a stylized right prism or prismatic form and its projections are chosen to a cross section and with a diameter of 10 to 20 %, such as around 15 %, of the length of the support plate.

[0060] There is a technical problem in being able to understand the significance of the advantages related to and/or the technical measures and considerations which will be required for suggesting an arrangement in which a distance between two each other facing, as circular or elliptical, projections or studs is adapted to 50 % to 60 % of the length dimension of the support plate.

[0061] There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations which will be required for indicating an arrangement in which the clamping and/or interrelated arrangement in inactivable position but carrying the inner end portion of the guide bar can with its displaced, but still interrelated, clamping plate move a right angular distance from the support plate which exceeds the thickness of the guide bar by 80-110 %.

THE SOLUTION



[0062] The present invention takes as its starting point the known technology indicated by way of introduction and concerns an arrangement defined by the features of claim 1.

[0063] Preferred embodiments are defined by the features of dependent claims 2-12.

ADVANTAGES



[0064] The advantages which primarily must be considered as characterizing the present invention and the specific significant characteristics disclosed thereby are that in this manner prerequisites have been created for indicating, in an arrangement according to the preamble of Claim 1, that the guide bar is by an interrelated arrangement adapted for clamping to the drive motor unit, such as in the form of a clamping unit and a clamping means, and with the therein included support plate and/or a movable or displaceable clamping plate or the like, intended for clamping the guide bar.

[0065] Clamping means within the clamping interrelated arrangement are, during an inactivated position of the arrangement, with the purpose of loosening the guide bar displaced perpendicularly a chosen distance, such as exceeding a chosen thickness of the guide bar.

[0066] The inner end portion of the guide bar facing the drive motor unit and/or the clamping plate is initially in a first mode of motion to be able to be displaced in a first direction from the support plate and the guide bar only in the form of a second, subsequent mode of motion is to be able to be displaced along a plane allotted to the guide bar and in a direction from the support plate interrelated with the clamping plate and out of the inactivated arrangement.

[0067] Retaining a guide bar and its inner end portion will then be able to occur in reverse order.

[0068] The invention indicates that an interrelated arrangement is to be allotted a fixed and anchored support plate and a movable or displaceable clamping plate for clamping the inner end portion of an intermediately disposed guide bar, and wherein the clamping plate is brought to an inactivable position, wherein the clamping plate and/or the end area in a first mode of motion is displaced in a direction from the support plate and thereafter, in a second mode of motion, the end area of the guide bar is displaced along a plane allotted to the guide bar and out of the inactivated interrelated arrangement.

[0069] It is further indicated that a support plate for the arrangement properly anchored to the chassis can be chosen with at least two short outwardly directed projections or studs adapted for cooperation with peripheral recesses allotted to the inner portion or area of the guide bar and a clamping means extending between the projections, such as being attached to the support plate and passing freely through the clamping plate, such as at least a screw thread allotted to the support plate, said screw thread in the activated position securing the guide bar between the support plate and the clamping plate.

SHORT DESCRIPTION OF THE DRAWINGS



[0070] Prior art and presently proposed embodiments exhibiting the significant characteristics related to the present invention will now be described with reference to the accompanying drawings with the purpose of showing examples. In the Figures:

Figure 1 shows a perspective view of a motor saw illustrated as a motor saw arrangement having a drive motor unit which by means of an "interrelated arrangement" or a clamping arrangement is to be able to support a guide bar arrangement, wherein this drawing is shown in a horizontal view in accordance with the indications of the invention,

Figure 2 shows a horizontal view of the drive motor unit attached to the inner portion of a guide bar or its end portion (without the saw chain) over an activated interrelated arrangement according to Figure 1 ,

Figure 3 shows in a perspective view an arrangement with the saw chain extended towards its guide bar and with an arrangement of piston and cylinder displaceably supported by the chassis of the drive motor unit and having two removable or displaceable clamping means,

Figure 4 shows a different perspective view than Figure 3 comprising a removable clamping arrangement cooperating with the inner (its first) one of and partly removable interrelated arrangements,

Figure 5 shows a perspective view of a guide bar's first (its inner one) towards the driving motor unit facing inner end portion having a rectangular recess related to the guide bar extending the saw chain and an interrelated arrangement having a torque ("M") active to the free (other) end area of the guide bar,

Figure 6 shows a perspective view of an arrangement extending the saw chain towards the guide bar and the chassis of the drive motor unit to the fixed and anchored support plate according to the invention belonging to the arrangement linking or interrelating together with the guide bar having a centered rectangular projection connecting to a centered recess according to Figure 5 for the inner end portion of the, side facing the drive motor unit, Figure 7 shows a perspective view of a rigid and anchored support plate having two side related short projections (stubs) each connecting to a recess of the inner end portion of a guide bar according to Figure 8, with a clamping means and with an enlarged view over an upwardly cone shaped projection for cooperation with a recess exhibiting a corresponding cone shape in the inner end portion of the guide bar,

Figure 8 shows in a perspective view the inner end portion of the guide bar provided with two peripheral circular recesses and an interrelated short slit.

Figure 9 shows a side view of an interrelated arrangement applicable in the embodiments according to Figures 7 and 8, respectively, in an inactivable position for an upper clamping plate and intended to illustrate a position for removing the guide bar from a support plate lying below the same and having two projections according to Figure 7,

Figure 10 shows a possible distribution of one of the materials within the inner end portion of the guide bar taking up the force distribution caused by a torque ("M") related to the outer end portion of the guide bar and in an activated clamping arrangement according to Figures 7 and 8, respectively,

Figure 11 illustrates equally as Figures 8 and 10 the force distribution caused by a torque ("M") within the outer end portion of the guide bar at an activated interrelated arrangement as seen in Figures 7 and 8.

Figure 12 shows a distribution of forces in material stresses in the inner end portion of a guide bar and an activated interrelated arrangement with a centered and elongated slit allotted to the guide bar according to the earlier known form (EP 0 993 767 B1) of the inner end area of the guide bar,

Figure 13 shows a plan view of the inner end portion of a guide bar having elliptically shaped recesses and being provided with introduced measurements and with the clamping means disposed within a center line of the two recesses but closely related to the end portion of the slit,

Figure 14 shows partly in a section a proposed embodiment of a projection oriented within the inner area of the support plate and adapted to a support plate ac- cording to Figure 7 and

Figure 15 illustrates an embodiment forming an alternative to the embodiment shown in Figure 9 exposing two projections for the movable or displaceable clamping plate.


DESCRIPTION OF THE PRESENTLY PROPOSED EMBODIMENTS



[0071] It shall now by way of introduction be pointed out that in the subsequent description of the presently proposed embodiments which exhibit the significant characteristics of the invention and which are clarified by the drawings shown in the following we have chosen terms and specific terminology with the purpose of thereby primarily clarifying the basis of the invention.

[0072] However, in this connection it should be noted that the terms chosen shall not be seen as limited solely to the ones utilized and chosen here and it shall be understood that each such chosen term is to be construed such, that it in addition comprises all technical equivalents which function in the same or basically the same manner for thereby being able to achieve the same or essentially the same purpose and/or technical effect, and falling within the scope of the claims.

[0073] Thus, with reference to the accompanying drawings Figures 1 to 15 and partially Figure 13, the latter schematically and in detail show the basic prerequisites of the present invention, wherein the significant characteristics of the invention have been set forth by the now proposed and in the following more specifically described embodiments concerning a motor saw and a motor saw arrangement illustrated here and allotted the reference designation "A".

[0074] Thus, Figure 1 shows in a perspective view said motor saw arrangement "A" having a guide bar arrangement 2 adaptable to the drive motor unit 1 of a motor saw, wherein said drive motor unit 1 comprises a drive motor 3 of known structure and not more specifically shown.

[0075] This drive motor 3 is permanently connected to the chassis 1a of the drive motor unit 1, with a rotatable axis 3a being adapted to directly support an easily replaceable driving pulley 4 here shaped as a toothwheel 4a (Figure 2) provided with external teeth, said toothwheel being adapted to cooperate with inwardly facing cogs or teeth of a saw chain, said cogs being disposed within a portion 5a of an endless, not shown, saw chain 5, which saw chain 5 also is adapted with additional portions to run along tracks 2a', 2b' allotted to side edges 2a, 2b directed away from the guide bar 21, and a guide bar arrangement's 2 external end area 2c' of the guide bar 21 allotted, by the motion of said saw chain 5 driven disc, a relinking disc 2c, a cog wheel or a toothwheel 2c" or the like. Thus the endless saw chain 5 will run with a first portion 5a over a driven drive disc 4 or toothwheel 4a and, with a second portion 5b along the track 2b', will run with a third portion 5c over the relinking disc 2c or the toothwheel 2c" and with a fourth portion 5d will run along track 2a' for again being connected to said first portion 5a.

[0076] The embodiment more specifically shows that the periphery 4" of this drive disc 4 or toothwheel 4a is to be adapted such, that its periphery can be distributed with a number of cogs or teeth connecting to a value chosen between 20 and 24, such as more specifically the value 22, which is applicable in the perspective side view illustrated by Figure 3.

[0077] The invention is further based on a structure of the motor 3 not shown in detail and which primarily is to be of a known standardized and a chosen hydraulic type that may be driven by an overpressure.

[0078] In this connection it should be noted that the mentioned values 20 to 24 above and specifically the value 22 are primarily to refer to a standardized hydraulic drive motor unit 1 having a hydraulically driven hydraulic motor (volume 34 cm3) connected to said guide bar arrangement 2 with a specific design of its width dimension and utilizing a larger drive disc or toothwheel 4a deviating from standardizing and utilizing a means 7, 71 extending (or slacking) the saw chain 5 towards the guide bar 21.

[0079] Said means 7, 71 are more or less the same as the interrelated arrangement.

[0080] An increase of the volume of the hydraulic motor is indicated here without substantially having to change the fastenings of an earlier utilized drive motor to the chassis 1a of the drive motor unit. Here an increase of the periphery 4" of the drive disc 4 or toothwheel 4a occurs without being carried out having to substantial changes of the structure and construction of the drive motor unit 1.

[0081] Additionally, with a further increase of the number of cogs or teeth 4a around the periphery 4" of the drive disc or toothwheel 4a, up towards a value of 30 or more, a special structure should be considered with regard to the drive motor unit 1 as the guide bar arrangement 2 and when utilizing an arrangement 7 extending the saw chain 5 towards the guide bar 21.

[0082] According to the invention, the hydraulically acting drive motor 3 construction should be chosen of standard type and dimensioned with a volume of between 25 and 40 cm3. More specifically the present invention gives the indication that the volume can be adapted and chosen to more than or somewhat over 30, such as between 30 and 35, such as more specifically a hydraulic motor having a volume of 34 cm3.

[0083] Furthermore, it is important to the invention that the chosen drive motor 3 is to be adapted to be driven at a controllable and comparatively low number of revolutions, at least between 4500 and 6000 revolutions per minute (RPM), such as chosen between 5000 and 5500.

[0084] The invention has chosen a hydraulic motor of 34 cm3 and a drive disc 4 or a toothwheel 4a with 22 along the periphery 4" evenly distributed cogs 4a and drivable up to a maximum number of revolutions of 5300 revolutions per minute (RPM) or there around.

[0085] The invention is thus based on utilizing in this connection a chosen large hydraulic motor drivable with a rotatably low number of revolutions in order to be able to increase the driving security of the motor. This hydraulic motor 3 is to be able to be fastened to already positioned fasteners or easily modified fasteners for a standardized drive motor unit 1 and its chassis 1 a.

[0086] However, it is required that the velocity of rotation and a number of cogs or teeth distributed around the periphery 4" of the drive disc or toothwheel 4a are to be coordinated mutually in order to allot the saw chain 5 a translation velocity which will be limited only by requirements related to the chosen chain structure.

[0087] For the saw chain constructions mentioned by way of introduction the maximized speed has been chosen to 40 meters per second or therearound. In choosing a speed of over the mentioned 40 m/sec will result in an immediate danger of the chain braking while in operation.

[0088] Practical tests show that said drive disc 4 or toothwheel 4a should be allotted a diameter of approximately 130 - 160 mm and that the inner guide bar portion or end area 2d facing the drive disc 4 and the drive motor unit is adapted to be somewhat wider than a chosen diameter "d" (in Figure 4). It is here suggested approximately 10 - 20 mm wider. Figure 4 illustrates a guide bar 21 having a width dimension of 145 mm.

[0089] With regard to the guide bar arrangement 2 indicated by the invention, its width dimension "b" (in Figure 5) of its inner end portion can be directly adapted to the diameter of a drive disc or wheel 4 having a greatest number of teeth. For smaller diameters the saw chain 5 should leave the drive disc 4 in a direction obliquely outwards as compared to a tangent allotted to the periphery 4" of the wheel for engaging cooperation with the track 2b'.

[0090] More specifically it is indicated that a distance "d1" in Figure 4 is to be chosen between the center 4' of the drive disc 4 or the toothwheel 4a and a part or supporting plate 7a of the mechanical means 7 allotted to guide bar 21, said support plate being illustrating here as a support plate having a fastening means for fastening the guide bar arrangement 2 over its sword portion or end area 2d to the chassis 1a of drive motor unit 1, wherein this distance "d1" is to be adapted short, such as connecting to the diameter (2 x "r") of the drive disc or toothwheel 4a or somewhat larger in order to be adapted to a motor saw construction intended and constructed for drive discs or toothwheels having a lower number of teeth than the ones proposed here.

[0091] In addition, the invention indicates the existence of an arrangement of the drive motor unit related saw chain 5 in the guide bar arrangement with regard to the drive motor unit, extending arrangement (combined with an arrangement clamping or interrelating the guide bar), e.a. in the form of a piston-cylinder-arrangement (71) in Figure 3. Said arrangement being active between the chassis 1 a of drive motor unit 1 and the guide bar 21 of the guide bar arrangement 2 adjacent to its inner guide bar portion or end area 2d, wherein this arrangement is adapted to be activable by an adapted hydraulic pressure under an immovable saw chain 5, wherein said hydraulic pressure by means of a guide valve or other valves (not shown) allotted to the drive motor unit is locked and static under a non rotating operation of the drive disc 4 or the toothwheel 4a and the subsequent driving of the saw chain 5 being able to hold the saw chain extended during a cutting phase, such as within limits chosen beforehand.

[0092] This static hydraulic pressure is then to be active during one or a plurality of cutting processes chosen beforehand and in consideration of the chosen cutting pressure against a wooden base and the width dimension and/or the cross section of the cutting or the cutting track.

[0093] More specifically it is indicated that the arrangement 7 extending saw chain 5 towards guide bar 21 can be adapted with a fastening means in the form of a support plate 7a and a displaceable clamping plate 7b to cooperate with a recess or opening 2e shaped to the guide bar 21 adjacent to the guide bar portion or the inner end area 2d, said recess being rectangularly elongated and connecting in Figure 5 to a rectangle having a longer side portion 2e' oriented crosswise of a lengthwise oriented center line 2' of said guide bar arrangement 2.

[0094] Figure 5 shows a plan view of a part of the open-lying guide bar 21 of a guide bar arrangement (2) and particularly its inner end portion 2d and its partial portion 2d facing the drive motor and having a rectangular opening or recess 2e serving as a first embodiment and being disposed crosswise of a center line 2' allotted to the guide bar arrangement (2), wherein this end portion 2d here is allotted a width dimension "b" of 145 mm and is provided with a curved edge 2f connecting to a portion of a circular line, said edge in its turn being dimensioned for connecting tightly, or at least closely to engage, the radius of curvature "r" of drive disc or toothwheel 4a, here designated (2r) for its diameter.

[0095] The part or edge 2f should have a value of the radius of curvature corresponding to (r + 10 to 20 mm).

[0096] Figure 5 illustrates that a straight edge 2e' formed by the rectangle is to face said drive disc (4) and to lie crosswise to its center line 2'.

[0097] The motor saw arrangement "A" with its drive motor unit 1 is adapted to support the guide bar arrangement 2 over a clamping or interrelating arrangement 71 in Figure 7, as a mechanical means, for clamping the guide bar 21 against the chassis, adapted as coordinated with and/or clamping together such as a saw mechanical means, said arrangement 71 being adapted to be able to take an activable position in which the chassis (1a) included in the drive motor unit 1 will become solidly related to and anchored to the guide bar arrangement and its guide bar 21 or an inactivable position in which the chassis (1 a) of drive motor unit 1 will be loosely related to the guide bar arrangement 2 and its guide bar 21 and in this inactivated position, by a relative motion in a direction from the support plate 7a and thereafter in another direction from its chassis (1 a) release from said drive motor unit said mentioned guide bar 21 and its inner end area 2d.

[0098] The invention is based on shaping the interrelated arrangement 71 as a fixed or anchored support plate 7a and a displaceable clamping plate 7b (Figure 9) for in an active position properly holding solely the inner end area 2d of the guide bar 21 and as a guide bar arrangement 2 being able to take up the forces which are to be referred to the bending or rotational motion "M" which can become active at the end of the outer end portion or area 2c' of the guide bar.

[0099] The invention indicates that the arrangement 71 allotted said anchored sup- port plate 7a and said displaceable clamping plate 7b in an active position clamps the inner end area 2d of the intermediately lying guide bar and is brought to an inactivable position wherein the clamping plate 7b and/or the end area 2d in a first mode of motion are displaced in a direction from the support plate 7a and in a second mode of motion said end area 2d and its guide bar 21 are displaced along the plane "P" allotted to the guide bar and out of the inactivated position of said arrangement 71.

[0100] The present invention is based on that the inner area may preferably be formed with one centrally oriented slit 21 a3, Figure 8, which has a total length dimension terminating in its innermost end area 21 a3'. This slit may be oriented across the support plate 7a and/or under the clamping plate 7b.

[0101] Furthermore, the inner area 2d may have two "peripheral" recesses which may be facing and be covered by the support plate 7a and/or the displaceable clamping plate 7b.

[0102] The present invention suggests, in said inactivated position for the interrelated arrangement, unique modes of motions in order to displace the guide bar 21 from the chassis 1 a, where said arrangement 71 and its clamping means 7c can be brought into an inactivated position and a stop position by releasing said clamping means 7c and during this inactivated position initially loosening or displacing said saw chain 5 from the guide bar 21 and its relinking disc 2c and in this position displacing said guide bar 21 and its drive motor unit facing end section or end area 2d along said plane "P" oriented through the side edges of the guide bar and out of said inactivated position for the arrangement.

[0103] According to the invention the interrelated arrangement, primarily in the form of an arrangement 71 having a displaceable clamping plate 7b and a therein included anchored support plate 7a intended for clamping the guide bar is adapted to be dis- placed in an inactivated position of the arrangement 71 a short and well adapted by stopping means restricting distance from said support plate 7a exceeding a chosen thickness of guide bar 21, wherein the end portion 2d facing drive motor unit 1 of guide bar 21 initially in a first mode of motion is adapted to be able to be displaced in a first direction at a right angle from support plate 7a and the guide bar 21 and in a following second mode of motion is adapted to be able to be displaced along said plane "P" allotted to guide bar 21 and out of the inactivated arrangement 71.

[0104] A support plate 7a for the arrangement 71 properly anchored to chassis (1 a) is, according the embodiment of Figure 7, to be chosen to exhibit two short outwardly directed (sidewisely directed, upwardly directed or downwardly directed) projections or studs 7a1, 7a2, where each one is adapted for cooperation with peripheral or at a maximized distance from each other disposed recesses 21 a1, 21 a2 in Figure 8 allotted for cooperation with the guide bar 21, and a clamping means 7c disposed between the projections, such as one with an allotted threading 7c'. It should be noted here that these projections 7a1, 7a2 or studs are to be shaped such that they can cooperate tightly (without clearance) with recesses 21 a1, 21 a2 for without sliding to hold the inner end area 2d of the guide bar between said anchored support plate 7a and said displaceable clamping plate 7b. Here primarily slanting coordinating surfaces are indicated.

[0105] In the activated position said displaceable clamping plate (7b), not shown In Figure 7 but indicated, is adapted to urgently hold guide bar 21 against the upper surface of said support plate 7a.

[0106] The short outwardly directed projections 7a1, 7a2 are allotted a height measurement corresponding to or at least somewhat smaller than the thickness "t" of guide bar 21, illustrated in Figures 9, 14 and 15.

[0107] The short outwardly directed projections 7a1, 7a2 of support plate 7a are allotted a circular (Figure 7) cross-section, according to the invention, and/or elliptical (Figure 11) cross section and can be slightly conically shaped upwards (Figure 7 and its enlarged cross section) so as to be able to distance free cooperate with recesses 21 a1 and 21 a2.

[0108] The cross section "a" or the diameter of one of said projections 7a2 (and 7a1) is chosen to 15 to 25 %, such as around 20 %, of the total length dimension "b" of support plate 7a crosswise with regard to the lengthwise direction 2' of the guide bar.

[0109] The clamping and together-linking or interrelating arrangement 71 has in Figure 7 been chosen to have a rectangular cross section (a stylized rectangular prisma shape) having a bolt 7c with a threading 7c' and/or a nut 7c" having a diameter "c" of 10 to 20 %, such as around 15 %, of the length dimension "b" of support plate 7a.

[0110] A distance "d" between opposing circular and/or elliptical periphery surfaces of projections 7a1, 7a2 is adapted to 50 to 60 % of the length dimension "b" of the support plate.

[0111] The along bolt 7c movably and displaceably disposed clamping plate (7b) is adapted to be able to move upwards a distance "e" from support plate 7a in Figure 9 and the end area 2d resting thereon, which exceeds the thickness "t" of guide bar 21 by 80 - 100 %.

[0112] Figure 9 shows a position of the clamping arrangement 71 in a side view in which the support plate 7a loosely supports guide bar 21 and in which two holes 21a1, 21a2 in the peripheral area of the guide bar tightly cooperate with individual projections or raising studs 7a1, 7a2 and with a centrally disposed clamping means 7c which together with a loosened nut 7c" is located in its upper and inactive position.

[0113] Figure 10 has the purpose of being able to illustrate the possible concentrations of force which can be considered to become active with in the rectangular recess 2e of the end area 2d cooperating with an introduced rectangular raising 2e" (not shown) in the support plate 7a and in an occurring pending or torque moment "M" the concentrations of forces are illustrated in the form of point loads and allotted the reference numerals F1 and F2.

[0114] In the same manner force concentrations F3 and F4 have been introduced around the recesses 21a1 and 21a2 in Figure 11 at an occurring bending or torque moment "M". With regard to the known technology according to Figure 12 the concentrations of forces F5 and F6 will become so great that they can create a tendency of a plastic deformation within said slot 40, a deformation which has shown to be very troubling and which as a rule requires the guide bar to be replaced by a standardized width dimension "b1".

[0115] Figure 14 shows an embodiment of utilized projections 7a2 wherein this projection is shaped with a breakable area 7a2' being reduced in width and intended to be broken up with occurring strains of force within the guide bar 21 or holes 21 a2 exceeding a predetermined value so as thereby to be able to avoid overloads and deficiencies in the drive motor unit 1 and its surrounding equipment.

[0116] Figure 15 illustrates a tightening or interrelated arrangement 71' in which the clamping plate 7b' is provided with projections 7a1', 7a2' and an intermediately positioned recess 7a3' for thereby distributing developed tension forces from the clamping means 7c towards the projections 7a1', 7a2' and primarily towards the inner end area 2d of the guide bar adjacent to the recesses or holes 21 a1 and 21 a2. The reference designation 7d has the purpose of illustrating the existence of a resilient member or a means, such as a compression spring 7d' shaped to a screw line.

[0117] The invention is based on letting the end portion 2d of guide bar 21 according to Figure 11 be as wide "b" as possible for distributing the recesses 21 a1 and 21 a2 from each other so that the edge portions can take up the forces "F3", "F4" which are created by the applied rotational, bending or torque movement "M". The chosen width dimension "b" will have practical consequences and can therefore not be chosen to all together big a size.

[0118] The present invention shows the existence of a spring means 7d' which is to be able to urge the clamping plate 7b' in a direction from the support plate 7a' in an inactivable position of the arrangement 7.

[0119] Not according to the invention is provided a construction of a guide bar 21 intended and adapted for i.a. being included in an arrangement 7 or 71.

[0120] The inner end portion 2d facing a clamping and linking or interrelated arrangement 71 is provided with at least one slit 21a3 for offering a displacement of the guide bar with regard to said arrangement 71, and where said slot 21a3 may be centrally oriented along said center line 2' disposed in the lengthwise extension of the guide bar.

[0121] The mentioned slot 21a3 is adapted to exhibit a lengthwise extension to an end area 21a3' from an edge line 2f of the guide bar and which is to extend centrally in the mentioned end portion 2d, such as at least somewhat smaller than the width dimension of said supporting plate 7a and said clamping plate 7b, and side relating the end area 21 a3' for the mentioned slit 21 a3 there exist two on individual sides of the slit and at the level of the mentioned end portion 2d for subtaking recesses 21a1, 21a2, which are dimensioned for taking up the forces which are to be referred to from a bending moment ("M") active on the outer end area 2c' of the guide bar.

[0122] This bending moment "M" is normally of short time duration but momentarily high and occurs when the guide bar 21 and its saw chain 5 are clamped or stuck in a cutting or a cut off while the guide bar 21 is being actuated for a rotational movement in its plane "P".

[0123] The invention is of course not limited to the embodiment mentioned above as an example and can be subjected to modifications within the frame of the invention contemplation illustrated in the following claims.

[0124] It should particularly be noted that each shown unit and/or circuit can be combined with each other shown unit and/or circuit within the frame of being able to achieve the desired technical function.


Claims

1. An arrangement of a motor saw and an adapted guide bar arrangement (2) for a motor saw arrangement ("A"), wherein said drive motor unit (1) with its chassis (1a) comprises a drive motor unit (1), the rotatable shaft (3a) of which is adapted to carry a drive disc (4), such as a toothwheel (4a) shaped around the periphery (4"), around which toothwheel a portion (5a) of an endless saw chain (5) is adapted to run and which saw chain (5) also is adapted with its remaining portions to run along said guide bar arrangement (2) and its guide bar (21) and along side edges directed away from each other and its allotted tracks (2a', 2b') and to the outer end area (2c') of the 20 guide bar (21) allotted, by the translation motion of the saw chain, a driven relinking disc, such as a toothwheel or similar, and wherein the motor saw arrangement ("A") with its drive motor unit (1) is adapted to support said guide bar arrangement (2) over an arrangement (7) adapted for clamping an inner end area (2d) facing the chassis (1a) of the guide bar (21), such as a clamping arrangement (7), said arrangement (7) being adapted to be able to take an activable position wherein the chassis (1a) included in the drive motor unit (1) becomes solely and is fixedly anchored related to the guide bar arrangement (2) and its guide bar (21) or an inactivable position in which the chassis (1a) of the drive motor unit (1) is loose and freely related to the guide bar arrangement (2) and its guide bar (21) and in this inactivated position, by a relative motion or displacement in a direction from the drive motor unit (1) and its chassis (1a), releases from the drive motor unit (1) and its chassis (1 a) said guide bar and during the mentioned inactivating position indicates a pattern of action i.a. for removing the guide bar from the chassis, wherein said arrangement can be brought to said inactivable position by loosening a clamping means (7c) and during this inactivated position of the arrangement loosening said saw chain (5) from the guide bar (21) and its relinking disc (2c) and displacing the end portion (2d) of the guide bar and its drive motor facing end portion (2d) along the guide bar allotted, through away-directed side edges of the guide bar oriented plane ("P") and out of the inactivated position of the arrangement (7), wherein from a clamping position for said guide bar arrangement (2) and to a free position thereof said clamping arrangement is formed as an interrelated arrangement (71), wherein said interrelated arrangement is allotted a fixed support plate (7a) and a displaceable clamping plate (7b) coordinated with the support plate (7a) for clamping with said clamping means (7c) the inner end portion (2d) of an intermediately positioned guide bar, wherein the interrelated arrangement (71) is adapted to be brought to an inactivable position for letting the clamping plate be released by loosening the clamping means (7c) and the clamping plate (7b) and/or the end area (2d) for in a first mode of motion being displaceable at right angles a distance ("e"), which distance "e" is exceeding a thickness of the guide bar in a direction from said support plate (7a),but still remaining interrelated or linked together with each other and within a second mode of motion immediately following the first mode of motion letting said end area (2d) and guide bar (21) be brought or displaced along said plane ("P") allotted to the guide bar and out of an inactivated interrelated arrangement (7), and wherein the support plate (7a) tightly anchored to the drive motor unit (1) or the movable clamping plate (7b) relative to the arrangement (7) is provided with two short projections (7a1, 7a2), each one being adapted for cooperation with recesses (21a1, 21a2) allotted to the guide bar (21) and with between the projections shaped clamping means (7c), such as one with an associated threading (7c'), which in its activated position is adapted to hold and clamp the inner end area (2d) of the guide bar (21) against the support plate (7a), characterized in that the short outwardly directed projections (7a1, 7a2) of the support plate are each one provided with a circular cross section.
 
2. Arrangement in accordance with claim 1, characterized in that said short outwardly directed projections (7a1, 7a2) are allotted a height measurement, counted from a surface facing the end portion of the support plate (7a), or at least somewhat shorter than the thickness dimension ("t") of the guide bar.
 
3. An arrangement in accordance with claim 1 or 2, characterized in that the cross section for one of the projections is 15 to 25 %, such as around 20%, of a length dimension ("b") of the support plate (7a) crosswise to a length direction (2') of the guide bar.
 
4. Arrangement in accordance with claim any of the preceding claims, characterized in that the clamping means (7c) is provided with a circular cross section and acting directly or indirectly towards the projections and with a diameter of 10 to 20 %, such as around 15%, of the length dimension ("b") of the support plate (7a).
 
5. An arrangement in accordance with anyone of claims 2 to 4, characterized in that a distance ("d") between opposing periphery surfaces of projections is 50 to 60% of the length of the support plate.
 
6. Arrangement in accordance with anyone of the preceding claims, characterized in that the displaceable clamping plate (7b) is adapted to be able to be displaced a distance ("e") from the support plate (7a) towards a stop means, which is 80 - 100% larger than a thickness of the guide bar.
 
7. Arrangement in accordance with anyone of the preceding claims characterized in that one or more projections are disposed with a braking or restricted area adapted to resist loads up to a maximum load of the projection.
 
8. Arrangement in accordance with anyone of the preceding claims, characterized in that the displaceable clamping plate (7b) exhibits a recess adapted to extend between said projections (7a1, 7a2).
 
9. Arrangement in accordance with anyone of the preceding claims, respectively, characterized in that a spring unit (7d) is provided, in an inactivable position of the arrangement (7), to press the clamping plate (7b) in a direction from the support plate (7a).
 
10. Arrangement in accordance with anyone of the preceding claims, characterized in that one or more projections is provided with a shape directed from the support plate and/or clamping plate and having successively reduced cross sections, such as the shape of a cone, and that the inner end area of said guide bar exhibits at least one recess corresponding to the shape of said reduced cross section.
 
11. Arrangement according to any of the preceding claims, characterized in that said support plate (7a) and/or said clamping plate (7b) is completely covering said recesses (21a1, 21a2) and an intermediately disposed slot (21 a3).
 
12. Arrangement in accordance with claim 11, characterized in that said slot (21a3) is with its end portion (21a3') adapted to extend to somewhat pass a line extending between the central portions of the recesses.
 


Ansprüche

1. Anordnung einer Motorsäge und einer angepassten Führungsschienenanordnung (2) für eine Motorsägeanordnung ("A"), wobei die Antriebsmotoreinheit (1) mit ihrem Chassis (1a) eine Antriebsmotoreinheit (1) umfasst, deren drehbare Welle (3a) zum Tragen einer Antriebsscheibe (4), wie beispielsweise eines Zahnrades (4a), das um den Umfang (4") herum geformt ist, geeignet ist, um welches Zahnrad ein Abschnitt (5a) einer endlosen Sägekette (5) laufen kann und welche Sägekette (5) auch mit ihren übrigen Abschnitten geeignet ist, entlang der Führungsschienenanordnung (2) und ihrer Führungsschiene (21) und entlang von voneinander abgewandten Seitenkanten und ihren zugeordneten Bahnen (2a', 2b') und zum äußeren Endbereich (2c') der Führungsschiene (21) zu laufen, der durch die Translationsbewegung der Sägekette eine angetriebene Umkopplungsscheibe, wie beispielsweise ein Zahnrad oder dergleichen, zugewiesen ist, und wobei die Motorsägenanordnung ("A") mit ihrer Antriebsmotoreinheit (1) angepasst ist, um die Führungsschienenanordnung (2) über einer Anordnung (7) zu tragen, die zum Klemmen eines inneren Endbereichs (2d), der dem Chassis (1a) der Führungsschiene (21) zugewandt ist, wie beispielsweise einer Klemmanordnung (7), angepasst ist, wobei die Anordnung (7) angepasst ist, um eine aktivierbare Position einnehmen zu können, in der das in der Antriebsmotoreinheit (1) eingeschlossene Chassis (1a) ausschließlich und fest in Bezug auf die Führungsschienenanordnung (2) und ihre Führungsschiene (21) oder eine inaktivierbare Position, in der das Chassis (1a) der Antriebsmotoreinheit (1) lose und frei in Bezug auf die Führungsschienenanordnung (2) und ihre Führungsschiene (21) und in dieser inaktivierten Position ist, verankert wird, durch eine Relativbewegung oder Verschiebung in eine Richtung von der Antriebsmotoreinheit (1) und ihrem Chassis (1a), von der Antriebsmotoreinheit (1) und ihrem Chassis (1a) löst, wobei die Führungsschiene und während der erwähnten Inaktivierungsposition ein Aktionsmuster i anzeigt.a. zum Entfernen der Führungsschiene vom Chassis, wobei die Anordnung in die inaktivierbare Position gebracht werden kann, indem ein Klemmmittel (7c) gelöst wird und während dieser inaktivierten Position der Anordnung die Sägekette (5) von der Führungsschiene (21) und ihrer Umkopplungsscheibe (2c) gelöst wird und der Endabschnitt (2d) der Führungsschiene und ihr Antriebsmotor dem Endabschnitt (2d) entlang der zugeteilten Führungsschiene verschoben wird, durch weggerichtete Seitenkanten der Führungsschienen orientierten Ebene ("P") und aus der inaktivierten Position der Anordnung, wobei die Klemmanordnung von einer Klemmposition für die Führungsschienenanordnung (2) und zu einer freien Position derselben als eine zusammenhängende Anordnung (71) ausgebildet ist, wobei der zusammenhängenden Anordnung eine feste Trägerplatte (7a) und eine verschiebbare Klemmplatte (7b) zugeordnet ist, die mit der Trägerplatte (7a) zum Klemmen des inneren Endabschnitts (2d) einer zwischenpositionierten Führungsschiene mit den Klemmmitteln (7c) koordiniert ist, wobei die zusammenhängende Anordnung (71) angepasst ist, um in eine inaktivierbare Position gebracht zu werden, um die Klemmplatte durch Lösen der Klemmittel (7c) freizugeben, und die Klemmplatte (7b) und/oder der Endbereich (2d) in einer ersten Bewegungsart, die in einem rechten Winkel um einen Abstand ("e") verschiebbar ist, wobei der Abstand "e" eine Dicke der Führungsschiene in einer Richtung von der Trägerplatte (7a) überschreitet, aber immer noch miteinander verbunden oder verbunden bleibt, und innerhalb eines zweiten Bewegungsmodus unmittelbar nach dem ersten Bewegungsmodus, wobei der Endbereich (2d) und die Führungsschiene (21) entlang der der Führungsschiene zugeteilten Ebene ("P") und aus einer inaktivierten, miteinander verbundenen Anordnung (7) gebracht oder verschoben werden können, und wobei die Trägerplatte (7a), die fest an der Antriebsmotoreinheit (1) oder der beweglichen Klemmplatte (7b) gegenüber der Anordnung (7) verankert ist, mit zwei kurzen Vorsprüngen (7a1, 7a2) versehen ist, die jeweils für das Zusammenwirken mit Aussparungen (21a1, 21a2) angepasst sind, die der Führungsschiene (21) zugeordnet ist, und mit zwischen den Vorsprüngen geformten Klemmmitteln (7c), wie beispielsweise einem mit einem zugehörigen Gewinde (7c'), das in seiner aktivierten Position den inneren Endbereich (2d) der Führungsschiene (21) gegen die Trägerplatte (7a) halten und klemmen kann,
dadurch gekennzeichnet, dass die kurzen nach außen gerichteten Vorsprünge (7a1, 7a2) der Trägerplatte jeweils mit einem kreisförmigen Querschnitt versehen sind.
 
2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass den kurzen, nach außen gerichteten Vorsprüngen (7a1, 7a2) ein Höhenmaß zugeordnet ist, das von einer dem Endabschnitt der Trägerplatte (7a) zugewandten Fläche gezählt wird, oder zumindest etwas kürzer als das Dickenmaß ("t") der Führungsschiene.
 
3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Querschnitt für einen der Vorsprünge 15 bis 25 %, wie etwa 20 %, einer Längenabmessung ("b") der Trägerplatte (7a) quer zu einer Längsrichtung (2') der Führungsschiene beträgt.
 
4. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Klemmmittel (7c) mit einem kreisförmigen Querschnitt versehen ist und direkt oder indirekt auf die Vorsprünge wirkt und einen Durchmesser von 10 bis 20 %, wie etwa etwa 15 %, des Längenmaßes ("b") der Trägerplatte (7a) aufweist.
 
5. Anordnung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass ein Abstand ("d") zwischen gegenüberliegenden Umfangsflächen von Vorsprüngen 50 bis 60% der Länge der Trägerplatte beträgt.
 
6. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die verschiebbare Klemmplatte (7b) um einen Abstand ("e") von der Trägerplatte (7a) zu einem Anschlagmittel verschiebbar ist, das 80 - 100% größer als eine Dicke der Führungsschiene ist.
 
7. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein oder mehrere Vorsprünge mit einem Brems- oder eingeschränkten Bereich angeordnet sind, der geeignet ist, Belastungen bis zu einer maximalen Belastung des Vorsprungs standzuhalten.
 
8. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die verschiebbare Klemmplatte (7b) eine Aussparung aufweist, die sich zwischen den Vorsprüngen (7a1, 7a2) erstreckt.
 
9. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass eine Federeinheit (7d) in einer inaktivierbaren Position der Anordnung (7) vorgesehen ist, um die Klemmplatte (7b) in eine Richtung von der Trägerplatte (7a) zu drücken.
 
10. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein oder mehrere Vorsprünge mit einer von der Trägerplatte und/oder Klemmplatte gerichteten Form mit nacheinander reduzierten Querschnitten, wie beispielsweise der Form eines Kegels, versehen sind und dass der innere Endbereich der Führungsschiene mindestens eine der Form des reduzierten Querschnitts entsprechende Aussparung aufweist.
 
11. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Trägerplatte (7a) und/oder die Klemmplatte (7b) die Aussparungen (21a1, 21a2) und einen dazwischen angeordneten Schlitz (21a3) vollständig abdeckt.
 
12. Anordnung nach Anspruch 11, dadurch gekennzeichnet, dass der Schlitz (21a3) mit seinem Endabschnitt (21a3') so ausgestaltet ist, dass er sich etwas über eine Linie hinaus erstreckt, die sich zwischen den zentralen Abschnitten der Aussparungen erstreckt.
 


Revendications

1. Agencement d'une scie à moteur et agencement de guide-chaîne (2) adapté pour un agencement de scie à moteur (« A »), dans lesquels ladite unité de moteur d'entraînement (1) avec son châssis (1a) comprend une unité de moteur d'entraînement (1), dont l'arbre rotatif (3a) est adapté pour porter un disque d'entraînement (4) tel qu'une roue dentée (4a) formée autour de la périphérique (4"), autour de laquelle roue dentée, une partie (5a) d'une chaîne de scie sans fin (5) est adaptée pour s'étendre et laquelle chaîne de scie (5) est également adaptée avec ses parties résiduelles pour s'étendre le long dudit agencement de guide-chaine (2) et de son guide-chaîne (21) et le long des bords latéraux dirigés à distance les uns des autres et de ses voies allouées (2a', 2b') et vers la zone d'extrémité externe (2c') du guide-chaine 20 (21) alloué, par le mouvement de translation de la chaîne de scie, un disque de reconnexion entraîné tel qu'une roue dentée ou similaire, et dans lesquels l'agencement de scie à moteur (« A ») avec son unité de moteur d'entraînement(1) est adapté pour supporter ledit agencement de guide-chaîne (2) sur un agencement (7) adapté pour serrer une zone d'extrémité interne (2d) faisant face au châssis (1a) du guide-chaine (21), tel qu'un agencement de serrage (7), ledit agencement (7) étant adapté pour pouvoir prendre une position activable dans laquelle le châssis (1a) inclus dans l'unité de moteur d'entraînement (1) devient isolé et est ancré de manière fixe par rapport à l'agencement de guide-chaine (2) et à son guide-chaine (21) ou une position non activable dans laquelle le châssis (1a) de l'unité de moteur d'entraînement (1) est desserré et libre par rapport à l'agencement de guide-chaîne (2) et à son guide-chaine (21) et dans sa position non activée, par un mouvement ou déplacement relatif dans une direction à partir de l'unité de moteur d'entraînement (1) et de son châssis (1a), libère ledit guide-chaîne de l'unité de moteur d'entraînement (1) et de son châssis (1a), et pendant la position non activée mentionnée, indique un modèle d'action, c'est-à-dire pour retirer le guide-chaine du châssis, dans lequel ledit agencement peut être amené dans ladite position non activable en desserrant un moyen de serrage (7c) et pendant cette position non activée de l'agencement, en desserrant ladite chaîne de scie (5) du guide-chaine (21) et son disque de reconnexion (2c) et en déplaçant la partie d'extrémité (2d) du guide-chaîne et de son moteur d'entraînement faisant face à la partie d'extrémité (2d) le long du guide-chaîne alloué, par le biais de bords latéraux éloignés du plan orienté de guide-chaine (« P ») et hors de la position non activée de l'agencement (7), dans lesquels :
à partir d'une position de serrage pour ledit agencement de guide-chaîne (2) et jusqu'à sa position libre, ledit agencement de serrage est formé comme un agencement interdépendant (71), dans lequel :
ledit agencement interdépendant possède une plaque de support fixe (7a) et une plaque de serrage déplaçable (7b) coordonnée avec la plaque de support (7a) pour serrer, avec ledit moyen de serrage (7c), la partie d'extrémité interne (2d) d'un guide-chaine positionné dans une position intermédiaire, dans lequel l'agencement interdépendant (71) est adapté pour être amené dans une position non activable pour permettre la libération de la plaque de serrage en desserrant le moyen de serrage (7c) et la plaque de serrage (7b) et/ou la zone d'extrémité (2d) pour, dans un premier mode de mouvement, être déplaçable en angle droit, sur une distance (« e »), laquelle distance « e » dépasse une épaisseur du guide-chaîne dans une direction à partir de ladite plaque de support (7a), mais tout en restant toujours interdépendant ou reliées entre elles et dans un second mode de déplacement suivant immédiatement le premier mode de déplacement laissant ladite zone d'extrémité (2d) et le guide-chaine (21) être amenées ou déplacées le long dudit plan (« P ») alloué au guide-chaîne et hors d'un agencement interdépendant non activé (7), et dans lequel :

la plaque de support (7a) ancrée de manière serrée à l'unité de moteur d'entraînement (1) ou à la plaque de serrage mobile (7b) par rapport à l'agencement (7) est prévue avec deux saillies courtes (7a1, 7a2), chacune étant adaptée pour coopérer avec des évidements (21a1, 21a2) alloués au guide-chaîne (21) et avec des moyens de serrage (7c) formés entre les saillies, tel qu'un moyen de serrage avec un filetage (7c') associé qui, dans sa position activée, est adapté pour maintenir et serrer la zone d'extrémité interne (2d) du guide-chaîne (21) contre la plaque de support (7a),

caractérisés en ce que :
les saillies courtes (7a1, 7a2) dirigées vers l'extérieur de la plaque de support sont chacune prévues avec une section transversale circulaire.


 
2. Agencement selon la revendication 1, caractérisé en ce que lesdites saillies courtes (7a1, 7a2) dirigées vers l'extérieur possèdent une mesure de hauteur, mesurée à partir d'une surface faisant face à la partie d'extrémité de la plaque de support (7a), au moins légèrement plus courte que la dimension d'épaisseur (« t ») du guide-chaîne.
 
3. Agencement selon la revendication 1 ou 2, caractérisé en ce que la section transversale pour l'une des saillies est de 15 à 25%, par exemple environ 20%, d'une dimension de longueur (« b ») de la plaque de support (7a) transversalement par rapport à une direction de longueur (2') du guide-chaîne.
 
4. Agencement selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de serrage (7c) sont prévus avec une section transversale circulaire et agissant directement ou indirectement vers les saillies et avec un diamètre de 10 à 20%, par exemple environ 15%, de la dimension de longueur (« b ») de la plaque de support (7a).
 
5. Agencement selon l'une quelconque des revendications 2 à 4, caractérisé en ce qu'une distance (« d ») entre des surfaces périphériques opposées des saillies représente de 50 à 60% de la longueur de la plaque de support.
 
6. Agencement selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaque de serrage déplaçable (7b) est adaptée pour pouvoir être déplacée sur une distance (« e ») allant de la plaque de support (7a) vers un moyen de butée, qui est 80 à 100% plus grande qu'une épaisseur du guide-chaîne.
 
7. Agencement selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une ou plusieurs saillies sont disposées avec une zone de freinage ou limitée adaptée pour résister aux charges jusqu'à une charge maximum de la saillie.
 
8. Agencement selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaque de serrage déplaçable (7b) présente un évidement adapté pour s'étendre entre lesdites saillies (7a1, 7a2).
 
9. Agencement selon l'une quelconque des revendications respectivement précédentes, caractérisé en ce que l'on prévoit une unité de ressort (7d) dans une position non activable de l'agencement (7) pour comprimer la plaque de serrage (7b) dans une direction à partir de la plaque de support (7a).
 
10. Agencement selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on prévoit une ou plusieurs saillies avec une forme dirigée à partir de la plaque de support et/ou une plaque de serrage et ayant des sections transversales successivement réduites, comme la forme d'un cône, et en ce que la zone d'extrémité interne dudit guide-chaîne présente au moins un évidement correspondant à la forme de ladite section transversale réduite.
 
11. Agencement selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite plaque de support (7a) et/ou ladite plaque de serrage (7b) recouvre(nt) complètement lesdits évidements (21a1, 21a2) et une fente (21a3) disposée de manière intermédiaire.
 
12. Agencement selon la revendication 11, caractérisé en ce que ladite fente (21a3) est, avec sa partie d'extrémité (21a3'), adaptée pour s'étendre quelque peu au-delà d'une ligne s'étendant entre les parties centrales des évidements.
 




Drawing

















Cited references

REFERENCES CITED IN THE DESCRIPTION



This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Patent documents cited in the description