(19)
(11)EP 2 233 235 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
26.04.2017 Bulletin 2017/17

(21)Application number: 10002954.5

(22)Date of filing:  19.03.2010
(51)International Patent Classification (IPC): 
B23D 45/02(2006.01)
B27B 5/29(2006.01)
B23D 47/02(2006.01)
B27B 27/08(2006.01)

(54)

Slide type circular saw

Kreissäge mit Gleitmechanismus

Scie circulaire coulissante


(84)Designated Contracting States:
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 SE SI SK SM TR

(30)Priority: 26.03.2009 JP 2009077151

(43)Date of publication of application:
29.09.2010 Bulletin 2010/39

(73)Proprietor: Makita Corporation
Anjo, Aichi 446-8502 (JP)

(72)Inventors:
  • Sasaki, Katsuhiko
    Anjo Aichi 446-8502 (JP)
  • Inai, Masahiko
    Anjo Aichi 446-8502 (JP)

(74)Representative: Kramer Barske Schmidtchen Patentanwälte PartG mbB 
European Patent Attorneys Landsberger Strasse 300
80687 München
80687 München (DE)


(56)References cited: : 
EP-A2- 1 400 297
JP-A- 6 007 859
US-A- 5 768 967
US-A1- 2007 074 611
WO-A1-2009/010752
US-A- 5 241 888
US-A1- 2006 156 888
  
      
    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



    [0001] This invention relates to a slide type circular saw according to the preamble of claim 1, such a saw is known from US 2006/0156888.

    BACKGROUND ART



    [0002] US 2006/0156888 A1 discloses a miter saw having a slidable part which allows a cutting blade to be slidable in a direction substantially perpendicular to a pivot shaft of the cutting blade.

    [0003] In the slide type circular saw a saw unit having a motor-driven rotary blade is provided above a base, and configured to be slidable frontward and rearward relative to the base by a slide mechanism, so that even a workpiece having a large dimension in the front-rear direction can be cut through operations of lowering and sliding the saw unit. The slide mechanism, well known in the art as disclosed in Japanese Examined Utility Model Application Publication No. 6-7859, includes an arm stood at the base, a holding member provided at an upper end of the arm, and a pair of guide bars arranged parallel to each other and supported at the holding member in such a manner that the guide bars can slide frontward and rearward. Front ends of the guide bars are coupled to a front holder, and the saw unit is mounted to the front holder in such a manner that the saw unit is rendered pivotally movable upward and downward relative to the front holder. Rear ends of the guide bars are coupled to a rear holder that is provided to prevent undesirable disconnection.

    [0004] In such a slide mechanism as described above, bearings such as linear ball bearings 52 by which guide bars 51 are slidably supported are provided in a holding member 50, as shown in FIG. 9A. The linear ball bearings 52 are press-fitted in the holding member 50 to ensure a sufficient level of rigidity. Similarly, the coupling of the guide bars 51 to the front holder 53 is also achieved by press fitting. However, any error between an inter-axial pitch P1 of the linear ball bearings 52 press-fitted in the holding member 50 and an inter-axial pitch P2 of the guide bars 51 press-fitted in the front holder 53 would cause guide bars 51 to incline toward each other as shown in FIG. 9B when a saw unit is slid (i.e., the guide bars 51 are slid). This would then make a distance between the rear ends greater or smaller, and thus produce a great resistance against the sliding motion of the guide bars 51. For this reason, at the rear holder 54, the coupling of the guide bars 51 thereto is achieved by loose insertion with much play, so that the inclination of the guide bars 51 is absorbed by this play in the coupling at the rear holder 54.

    [0005] Such loose insertion of the guide bars 51 in the rear holder 54 allows the guide bars 51 to smoothly slide even if the guide bars 51 incline toward each other, thus serving to invariably provide a good operating feel. On the other hand, however, the loose insertion would disadvantageously produce a wobble and/or twisting, which would possibly lower the rigidity and cutting accuracy.

    [0006] Thus, there is a need to provide a slide type circular saw capable of ensuring a high degree of rigidity and cutting accuracy while retaining a good operating feel of sliding a saw unit.

    [0007] The present invention has been made in an attempt to eliminate the above disadvantages, and illustrative, non-limiting embodiments of the present invention may overcome the above disadvantages and other disadvantages not described above.

    SUMMARY OF THE INVENTION



    [0008] 
    1. (1) It is one aspect to provide a slide type circular saw in which a saw unit having a motor-driven rotary saw blade is disposed above a base in a manner that renders the saw unit movable upward and downward, a pair of slide bars extending parallel to each other in a front-rear direction, front ends and rear ends of the slide bars being connected by a front holder and a rear holder, respectively, a pair of holding portions being slidable relative to the slide bars with bearing parts supporting the slide bars, wherein the saw unit is mounted to one of the front and rear holders with the holding portions being fixed to the base, or the saw unit is mounted to the holding portions with the slide bars being fixed to the base, whereby the saw unit is rendered slidable in the front-rear direction,
      wherein
      the holding portions consist of a first holding portion and a second holding portion, the bearing part included in the first holding portion is press-fitted therein, while the bearing part included in the second holding portion is loosely inserted therein, and the second holding portion comprises a pressing member which is configured to press the bearing part of the second holding portion against an inner surface of the second holding portion in a direction perpendicular to a plane which contains axes of the slide bars, and
      connection of the slide bars by at least one of the front and rear holders may be established by a structure in which the slide bars are loosely inserted in the at least one of the front and rear holders and fastened therein by screws.
    2. (2) In the above-described configuration (1), the pressing member may comprise a setscrew screwed in the second holding portion to come in contact with an outer surface of the bearing part of the second holding portion.
    3. (3) In the above-described configuration (1), the pressing member may comprise a pair of setscrews which consist of front and rear set screws screwed at front and rear spots, respectively, in the second holding portion to come in contact with an outer surface of the bearing part of the second holding portion.
    4. (4) In the above-described configuration (1), with or without the feature (2), the number of bearing parts may be configured such that the second holding portion includes only one bearing part, and the first holding portion includes two bearing parts arranged in an axial direction of the first holding portion.
    5. (5) In the above-described configuration (1), connection of the slide bars by at least one of the front and rear holders may be established by a structure in which the slide bars are loosely inserted in the at least one of the front and rear holders and screws screwed in the at least one of the front and rear holders are engaged in grooves formed on peripheral surfaces of the slide bars.


    [0009] According to the above-described configuration (1), a high degree of rigidity and cutting accuracy can be ensured while a good operating feel of sliding a saw unit can be retained. Further, the connection can be established more easily in comparison with the case with press fitting, and thus the ease of assembly can be increased.

    [0010] With the feature (2) or (3), in addition to the advantages described above in relation to the configuration (1), since the pressing member is implemented as setscrew(s), the pressing member can easily be obtained without impairing the ease of assembly.

    [0011] With the feature (4), in addition to the advantages described above in relation to the configuration (1) with or without the feature (2), the restrictions on the press-fitted bearing parts and the free play of the loosely inserted bearing part can be well balanced, while the number of bearing parts can be reduced.

    [0012] With the feature (5), as well, in addition to the advantages described above in relation to the configuration (1), the connection can be established more easily in comparison with the case with press fitting, and thus the ease of assembly can be increased.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0013] The above aspect, other advantages and further features will become more apparent by describing in detail illustrative, non-limiting embodiments thereof with reference to the accompanying drawings, in which:

    FIG. 1 is a perspective view of a slide type circular saw according to an exemplary embodiment, as viewed from a right side thereof;

    FIG. 2 is a perspective view of the slide type circular saw as viewed from a left side thereof;

    FIG. 3 is a sectional view taken along line A-A of FIG. 1;

    FIG. 4 is a plan view of a portion around a handle;

    FIG. 5 is a front view of a portion around the handle;

    FIG. 6 is a diagram for illustrating a guide fence with an upper plate in a normal position;

    FIG. 7 is a diagram for illustrating the guide fence with the upper plate in a protruded position;

    FIGS. 8A and 8B are a cross section and a longitudinal section, respectively, for illustrating a modified example of a coupling structure of slide bars; and

    FIG. 9 is a schematic diagram for illustrating a slide mechanism provided in a conventional slide type circular saw.


    DESCRIPTION OF EMBODIMENTS



    [0014] Exemplary embodiments will be described hereinafter with reference to the accompanying drawings.

    [0015] Referring now to FIGS. 1 and 2, which are perspective views showing an exemplified embodiment of the present invention, a slide type circular saw 1 includes a base 2 and a saw unit 20, and the base 2 includes a turn base 3 and an arm 4. The turn base 3 is a table circular in shape as viewed from above, which is placed at a center of the base 2 and can be swiveled thereon. The arm 4 has a lever 5 with which the arm 4 can be tilted to the left and to the right up to 45 degrees at the maximum and can be fixed at a desired angle. At an upper end of the arm 4, as also shown in FIG. 3, tubular holding portions 6A, 6B arranged parallel to each other, extending in the front-rear direction, are provided in a pair as an integral part. Left and right pipe-like slide bars 7 are slidably supported by linear ball bearings 8A, 8B, which serve as bearing parts, in such a manner that the slide bars 7 can slide frontward and rearward.

    [0016] More specifically, one unit of the linear ball bearings 8A is provided in the holding portion 6A at the right side as viewed from the front, while two units of the linear ball bearings 8B are arranged, in the holding portion 6B at the left side as viewed from the front, in an axial direction thereof. The right-side unit of the linear ball bearings 8A is loosely inserted in a through hole 9A of the holding portion 6A, while the left-side units of the linear ball bearings 8B are press-fitted in a through hole 9B of the holding portion 6B, respectively (see FIG. 3). The holding portion 6A includes a pair of front and rear setscrews 10 which are screwed in an upper side thereof and serve as a pressing member. An end of each setscrew 10 protruding inside the holding portion 6A comes in contact with an outer surface of the linear ball bearings 8A, and presses the linear ball bearings 8A against an inner surface of the holding portion 6A (i.e., a lower side of the through hole 9A). In this way, the upward and downward motions of the linear ball bearings 8A are restricted, while only the side play is allowed. Denoted by 11 is a lock screw which is screwed in the holding portion 6A from a right side thereof and configured to be manually screwed in to press the slide bar 7 so that the sliding motion of the slide bar 7 can be locked.

    [0017] Front end portions of the slide bars 7 are press-fitted in a front holder 12 having a pair of blind holes (not shown), and thus connected to each other. Rear end portions of the slide bars 7 are also connected by a rear holder 13; however, they are not press-fitted, but loosely inserted in blind holes (not shown) formed in the rear holder 13, with screws 14 being screwed through upper and lower sides of the rear holder 13 into the slide bars 7. Denoted by 15 are front and rear cord hooks protrusively provided at right sides of the front holder 12 and the rear holder 13, respectively. The cord hooks 15 are arranged such that a claw of the front cord hook 15 faces to the front while a claw of the rear cord hook 15 faces to the rear. When the slide type circular saw 1 is not in operation, a power cord (connected to the saw unit 20 which will be described below) can be spanned between the cord hooks 15 and held thereon.

    [0018] The saw unit 20 is provided above the front holder 12 and coupled thereto by a support shaft 21 on which the saw unit 20 is configured to be tiltable upward and downward. The saw unit 20 is retained at the top dead center shown in FIGS. 1 and 2 by a torsion spring (not shown). The saw unit 20 includes a circular saw blade (not shown) that is driven by a motor 22 provided at a right side thereof, and a blade cover 23 with which an upper portion of the saw blade is covered. A safety cover 24 which covers a lower edge of the saw blade when the saw unit 20 is at the top dead center, and is rotated by a linkage (not shown) until the lower edge of the saw blade is uncovered according as the saw unit 20 lowers is provided under the blade cover 23. The safety cover 24 has a two-part structure consisting of a center portion 25 and a peripheral portion 26. The center portion 25 is a fanlike member coupled to a center of the blade cover 23, and the peripheral portion 26 is a member having a U-shaped cross section. The peripheral portion 26 is coupled, and fixed to an outer edge of the center portion 25 with a plurality of screws, and covers the peripheral edge of the saw blade.

    [0019] As shown in FIGS. 4 and 5, a handle 27 parallel to the blade cover 23 is provided above the motor 22. A grip portion 28 for operating which has a switch lever 29 is provided frontwardly of the handle 27, and a grip portion 30 for carrying is provided rearwardly of the grip portion 28 for operating.

    [0020] Denoted by 31 is a lock lever having a lower end portion that is engaged with the safety cover 24 to prevent the safety cover 24 from being rotated when the saw unit 20 is located at the top dead center. The lock lever 31 has another end portion protruding near the grip portion 28. Thus, when the saw unit 20 is lowered, the user's hand which grips the grip portion 28 is allowed to operate the lock lever 31 to release the engagement with the safety cover 24, so that the safety cover 24 is rotated according as the saw unit 20 is lowered. The lock lever 31 is, as best seen in FIG. 5, rotatably secured to a plate 45 with a screw 44, and the plate 45 is fastened to a projection 23a provided on the blade cover 23 with two screws 46. A motor shaft lock plate 47 which can be operated (pushed in) to lock a motor shaft is disposed rearwardly of the lock lever 31. Denoted by 48 is a rubber cap attached to an end portion of the motor shaft lock plate 47.

    [0021] On the other hand, the base 2 includes a radially extended portion 32 provided frontwardly of the turn base 3, and edge plates 33A, 33B provided on an upper surface of the extended portion 32, extending from the extended portion 32 to the center of the turn base 3. The edge plates 33A, 33B are configured to be slidable to the left and to the right, so that the width of a slit 34 formed therebetween can be adjusted by the sliding operation of the edge plates 33A, 33B. At a front end of the extended portion 32, a grip 35 for horizontal rotation (swiveling operation) of the turn base 3 is provided.

    [0022] The base 2 further includes bench portions 36 provided at the left and right of the turn base 3. The bench portions 36 has an upper surface having the same height as that of the turn base 3, and legs 37 extending frontward and rearward are provided under the bench portions 36. Denoted by 38 are bolt holes for fixing which are formed at front and rear end portions of each of the legs 37.

    [0023] A guide fence 39 is further provided on the upper surfaces of the turn base 3 and the bench portions 36, straddling the left and right benches 36. The guide fence 39 includes a pair of left and right guide portions 40 fixed on the left and right bench portions 36, and a semicircular detouring portion 41 detouring rearwardly round the edge plates 33A, 33B and connecting the left and right guide portions 40. One of the guide portions 40 located at the left side is, as shown in FIGS. 6 and 7, composed of a lower plate 42 and an upper plate 43. The lower plate 42 is fixed on the bench portion 36. The upper plate 43 is disposed on top of the lower plate 42 and configured to be slidable between a normal position where the upper plate 43 is directly above and contiguous to the lower plate 42 and a protruded position where the upper plate 43 is shifted to the left from the normal position.

    [0024] In operation of the slide type circular saw 1 configured as described above, first, a workpiece to be cut is put on the upper surface of the turn base 3 and pressed against the guide portions 40 of the guide fence 39 so that the workpiece is located in place. In this state, when the grip portion 28 of the handle 27 is grasped and the switch lever 29 is pushed in, the motor 22 start rotating and causes the saw blade to rotate. The saw unit 20 is then lowered, and the safety cover 24 is rotated to uncover the lower edge of the saw blade, so that the saw blade enters the slit 34 between the edge plates 33A and 33B to cut the workpiece at a right angle.

    [0025] When the turn base 3 is swiveled, the saw unit 20 is turned accordingly, and the angle of the edge plates 33A, 33B and the saw blade is changed with respect to the guide portions 40, so that the workpiece can be cut at an oblique angle as viewed from above; that is, the so-called miter cut can be performed. When the lever 5 is operated and the arm 4 is tilted at a desired angle to the left or to the right, the saw unit 20 is also tilted at that angle, so that the workpiece can be cut at an oblique angle as viewed from the front; that is, the so-called bevel cut can be performed. It is to be understood that the bevel cut tilted to the left can be performed after the upper plate 43 of the left guide portion 40 is slid to the left so that the upper plate 43 could not interfere with the tilted saw unit 20.

    [0026] On the other hand, when the saw unit 20 is to be slid to cut a workpiece that is long in the front-rear direction, the grip portion 28 of the handle 27 is grasped and the saw unit 20 is pulled to the front. Then, the slide bars 7 coupled integrally by the front holder 12 with the saw unit 20 are slid relative to the holding portions 6A, 6B, and thus the saw unit 20 can be slid to the front. After the saw unit 20 reaches the edge of the workpiece, the switch lever 29 is pushed in and the saw unit 20 is lowered, so that the rotating saw blade enters and cuts the workpiece. The saw unit 20 is then pushed to the rear, and the slide bars 7 are slid to the rear relative to the holding portions 6A, 6B. In this way, the saw unit 20 moves to the rear so that the workpiece can be cut while the saw blade is being slid rearward.

    [0027] When the slide bars 7 are slid frontward and rearward to allow the saw unit 20 to slid while cutting a workpiece, even if any error exists between the inter-axial pitch of the slide bars 7 press-fitted in the front holder 12 and the inter-axial pitch of the linear ball bearings 8A, 8B of the holding portions 6A, 6B, such an error can be absorbed by a play in the lateral direction provided in the right-side unit of the linear ball bearings 8A loosely inserted in a through hole 9A of the holding portion 6A; therefore, the slide bars 7 can be slid smoothly. Accordingly, a good operating feel of sliding the saw unit 20 can be obtained. Regardless of the play provided as described above, no wobble during the sliding operation would be produced because the setscrews 10 serve to restrict the upward and downward motions of the linear ball bearings 8A.

    [0028] As described above, with the slide type circular saw 1 implemented according to the present embodiment, the two units of the linear ball bearings 8B included in the holding portion 6B are press-fitted therein while the unit of the linear ball bearings 8A included in the holding portion 6A is loosely inserted therein and the holding portion 6A comprises a pressing member (setscrews 10) which is configured to press the unit of the linear ball bearings 8A against an inner surface of the holding portion 6A in a direction perpendicular to a plane which contains axes of the slide bars 7. Accordingly, a high degree of rigidity and cutting accuracy can be ensured while a good operating feel of sliding the saw unit 20 can be retained.

    [0029] In particular, since the pressing member in this embodiment is realized by the setscrews 10 screwed in the holding portion 6A to come in contact with an outer surface of the unit of the linear ball bearings 8A, the pressing member can be provided easily without impairing the ease of assembly.

    [0030] Moreover, since the number of units of the linear ball bearings 8A, 8B is configured, in this embodiment, such that the holding portion 6A includes only one unit and the holding portion 6B includes two units arranged in an axial direction of the holding portion 6B, and the unit of the linear ball bearings 8A is loosely inserted in the holding portion 6A with the setscrews 10 provided therein, the restrictions on the press-fitted units of the linear ball bearings 8B and the free play of the loosely inserted unit of the linear ball bearings 8A can be well balanced, while the number of units of the linear ball bearings can be reduced.

    [0031] Furthermore, since the connection of the slide bars 7 by the rear holder 13 is established by a structure in which the slide bars 7 are loosely inserted in the rear holder 13 and fastened therein by screws 14, the connection can be established more easily in comparison with the case with press fitting, and thus the ease of assembly can be increased.

    [0032] Although the slide bars are arranged laterally in the above-described embodiment, the slide bars may be arranged vertically, or in any other direction. For example, in a case where the slide bars are arranged vertically, the pressing member may be configured to press the bearing part in the lateral direction.

    [0033] The pressing member may not be limited to such means as in the above-described embodiment; a setscrew which is not screwed from above but is screwed from below may be adopted, instead. Any means other than the setscrew such as a spring which directly presses a bearing part, and a pin which is biased by a spring to press a bearing part, may be adopted as an alternative.

    [0034] Moreover, the above-described embodiment proposes that the connection of the slide bars to the front holder be established by press fitting, but an alternative structure may adopted in which the front end portions of the slide bars are loosely inserted in the front holder and fastened therein by screws. If the slide bars are connected at both of the front end and the rear end by loose insertion of the end portions plus fastening by screws in the holders, the ease of assembly is further improved.

    [0035] Besides, as shown in FIG. 8, it is also conceivable that the slide bars 7 are loosely inserted in the rear holder 13 and protruded end portions of screws 17 screwed in the rear holder 13 are engaged in grooves 16 formed on peripheral surfaces of the slide bars 7 to prevent the slide bars 7 from slipping out. This configuration may be adopted at the front holder. Screws may be screwed laterally from one side or vertically from below. The number of screws may be increased as desired. The grooves may, but not necessarily, be formed in the entire circumferences of the peripheral surfaces. With these engageable structures, the connection can be established easily and the ease of assembly is further improved.

    [0036] Furthermore, the configuration that enables sliding motion of the saw unit relative to the base may not be limited to a particular configuration described above. For example, the present invention may be implemented in a configuration such that a saw unit is pivoted on an upper end of an arm of which a lower end is provided with a rear holder by which slide bars are connected, whereas the slide bars are supported by bearing parts of holding portions provided at a rear end of the turn base, and the front end portions of the slide bars are connected by the front holder provided in a lower side of the base. Alternatively, the present invention may be implemented in a configuration such that the slide bars are fixed to the base and the saw unit is mounted to the holding portions slidable along the slide bars.

    [0037] In any other aspects as well, the present invention may be modified; for example, the saw unit may be configured to be tiltable either to the left or to the right, and a slide type circular saw may be configured without a turn base.


    Claims

    1. A slide type circular saw (1) in which a saw unit (20) having a motor-driven rotary saw blade is disposed above a base (2) in a manner that renders the saw unit (20) movable upward and downward, a pair of slide bars (7) extending parallel to each other in a front-rear direction, front ends and rear ends of the slide bars (7) being connected by a front holder (12) and a rear holder (13), respectively, a pair of holding portions (6A, 6B) being slidable relative to the slide bars (7) with bearing parts (8A, 8B) supporting the slide bars (7), wherein the saw unit (20) is mounted to one of the front (12) and rear holders (13) with the holding portions (6A, 6B) being fixed to the base (2), or the saw unit (20) is mounted to the holding portions (6A, 6B) with the slide bars (7) being fixed to the base (2), whereby the saw unit (20) is rendered slidable in the front-rear direction, wherein
    the holding portions (6A, 6B) consist of a first holding portion (6B) and a second holding portion (6A), wherein the bearing part (8A) included in the second holding portion (6A) is loosely inserted therein, and the second holding portion (6A) comprises a pressing member which is configured to press the bearing part (8A) of the second holding portion (6A) against an inner surface of the second holding portion (6A) in a direction perpendicular to a plane which contains axes of the slide bars (7), and the second holding portion (6A) includes only one bearing part (8A),
    characterized in that
    the bearing part (8B) included in the first holding portion (6B) is press-fitted therein, connection of the slide bars (7) by at least one of the front and rear holders (12, 13) is established by a structure in which the slide bars (7) are loosely inserted in the at least one of the front and rear holders (12, 13) and fastened therein by screws, and
    the first holding portion (6B) includes two bearing parts (8B) arranged in an axial direction of the first holding portion (6B).
     
    2. The slide type circular saw (1) according to claim 1, wherein the pressing member comprises a setscrew (10) screwed in the second holding portion (6A) to come in contact with an outer surface of the bearing part (8A) of the second holding portion (6A).
     
    3. The slide type circular saw (1) according to claim 1, wherein the pressing member comprises a pair of setscrews (10) which consist of front and rear setscrews (10) screwed at front and rear spots, respectively, in the second holding portion (6A) to come in contact with an outer surface of the bearing part (8A) of the second holding portion (6A).
     
    4. The slide type circular saw (1) according to any one of claims 1 to 3, wherein the screws screwed in the at least one of the front and rear holders (12, 13) are engaged in grooves formed on peripheral surfaces of the slide bars (7).
     
    5. The slide type circular saw (1) according to any one of claims 1 to 4, wherein connection of the slide bars (7) by one of the front and rear holders (12, 13) is established by press fitting.
     
    6. The slide type circular saw (1) according to any one of claims 1 to 5, wherein each of the slide bars (7) is shaped like a pipe.
     
    7. The slide type circular saw (1) according to any one of claims 1 to 6, wherein the bearing part (8A) and/or (8B) comprises a linear ball bearing.
     
    8. The slide type circular saw (1) according to any one of claims 1 to 7, further comprising a lock screw provided in one of the holding portions (6A, 6B), the lock screw being manipulatable to be screwed deep therein to be pressed against the slide bar (7) whereby a sliding motion of the slide bars (7) is locked.
     
    9. The slide type circular saw (1) according to any one of claims 1 to 8, further comprising cord hooks (15) provided protrusively at sides of the holders (12, 13), respectively, and configured to hold a power cord spanned therebetween.
     
    10. The slide type circular saw (1) according to any one of claims 1 to 9, wherein the saw unit (20) comprises a grip portion (28) for operating and a grip portion (30) for carrying.
     


    Ansprüche

    1. Gleitkreissäge (1), bei welcher eine Sägeeinheit (20), die ein motorangetriebenes Drehsägeblatt aufweist, oberhalb einer Basis (2) in einer solchen Weise so angeordnet ist, dass die Sägeeinheit (20) nach oben und nach unten bewegbar ist, ein Paar von Gleitstäben (7) sich parallel zueinander in einer Vorder-Rückrichtung erstrecken, vordere Enden und hintere Enden der Gleitstäbe (7) durch einen vorderen Halter (12) bzw. durch einen hinteren Halter (13) verbunden sind, ein Paar von Halteteilen (6A, 6B) mit Lagerteilen (8A, 8B), die die Gleitstäbe (7) lagern, relativ zu den Gleitstäben (7) gleitbar sind, wobei die Sägeeinheit (20) an einem von dem vorderen Halter (12) bzw. dem hinterem Halter (13), mit den Halteteilen (6A, 6B) an die Basis (2) fixiert, montiert ist, oder die Sägeeinheit (20) an die Halteteile (6A, 6B) mit den Gleitstäben (7) an die Basis fixiert montiert ist, wodurch die Sägeeinheit (20) in der Vorder-Rückrichtung gleitbar ist, bei der
    die Halteteile (6A, 6B) aus einem ersten Halteteil (6B) und einem zweiten Halteteil (6A) bestehen, wobei der Lagerteil (8A), der in dem zweiten Halteteil (6A) enthalten ist, lose darin eingeführt ist, und der zweite Halteteil (6A) ein Drückbauteil aufweist, das dazu konfiguriert ist, den Lagerteil (8A) des zweiten Halteteils (6A) gegen eine innere Oberfläche des zweiten Halteteils (6A) in einer Richtung senkrecht zu einer Ebene zu drücken, die die Achsen der Gleitstäbe (7) enthält, und der zweite Halteteil (6A) nur einen Lagerteil (8A) enthält,
    dadurch gekennzeichnet, dass
    der Lagerteil (8B), der in dem ersten Lagerteil (6B) enthalten ist, dort darin pressgepasst ist, die Verbindung der Gleitstäbe (7) durch zumindest einen von dem vorderen und dem hinteren Halter (12, 13) durch eine Struktur gebildet wird, bei welcher die Gleitstäbe (7) lose in dem zumindest einen von dem vorderen und hinteren Halter (12, 13) eingeführt ist, und durch Schrauben darin befestigt ist, und
    der erste Halteteil (6B) zwei Lagerteile (8B) enthält, die in einer axialen Richtung des ersten Halteteils (6B) angeordnet sind.
     
    2. Gleitkreissäge (1) nach Anspruch 1, bei der das Drückbauteil eine Passschraube (10) aufweist, die in dem zweiten Halteteil (6A) geschraubt ist, so dass sie in Kontakt mit einer äu-ßeren Oberfläche des Lagerteils (8A) des zweiten Halteteils (6A) kommt.
     
    3. Gleitkreissäge (1) nach Anspruch 1, bei der das Drückbauteil ein Paar von Passschrauben (10) aufweist, das aus einer vorderen und einer hinteren Passschraube (10) besteht, die an einer vorderen bzw. einer hinteren Stelle in den zweiten Halteteil geschraubt sind, so dass sie in Kontakt mit einer äußeren Oberfläche des Lagerteils (8A) des zweiten Halteteils (6A) kommen.
     
    4. Gleitkreissäge (1) nach einem der Ansprüche 1 bis 3, bei der die Schrauben, die zumindest in einem von dem vorderen und hinteren Halter (12, 13) geschraubt sind, mit Nuten in Eingriff stehen, die an einer Umfangsoberfläche der Gleitstäbe (7) ausgebildet sind.
     
    5. Gleitkreissäge (1) nach einem der Ansprüche 1 bis 4, bei der die Verbindung der Gleitstäbe (7) durch einen von dem vorderen und dem hinteren Halter (12, 13) durch Presspassung gebildet ist.
     
    6. Gleitkreissäge (1) nach einem der Ansprüche 1 bis 5, bei der jeder von den Gleitstäben (7) wie ein Rohr geformt ist.
     
    7. Gleitkreissäge (1) nach einem der Ansprüche 1 bis 6, bei der der Lagerteil (8A) und/oder (8B) ein lineares Kugellager aufweist.
     
    8. Gleitkreissäge (1) nach einem der Ansprüche 1 bis 7, die ferner eine Verriegelungsschraube aufweist, die an einem von den Halteteilen (6A, 6B) vorgesehen ist, die Verriegelungsschraube manipulierbar ist, dass sie tief darin eingeschraubt wird, so dass sie gegen den Gleitstab (7) drückt, wodurch eine Gleitbewegung der Gleitstäbe (7) verriegelt ist.
     
    9. Gleitkreissäge (1) nach einem der Ansprüche 1 bis 8, die ferner Kabelhaken (15) aufweist, die vorstehend an den Seiten der Halter (12, 13) jeweils vorgesehen sind und dazu konfiguriert sind, ein Stromkabel dazwischen zu spannen.
     
    10. Gleitkreissäge (1) nach einem der Ansprüche 1 bis 9, bei der die Sägeeinheit (20) einen Griffteil (28) für die Betätigung und einen Griffteil (30) zum Tragen aufweist.
     


    Revendications

    1. Scie circulaire de type coulissant (1) dans laquelle une unité scie (20) comportant une lame de scie rotative entraînée par un moteur est disposée au-dessus d'une base (2) d'une manière qui rend l'unité scie (20) mobile vers le haut et vers le bas, une paire de barres coulissantes (7) s'étendant parallèlement l'une à l'autre dans une direction avant-arrière, les extrémités avant et extrémités arrière des barres coulissantes (7) étant reliées par un support avant (12) et un support arrière (13), respectivement, une paire de parties de support (6A, 6B) pouvant coulisser par rapport aux barres coulissantes (7) avec des parties de roulement (8A, 8B) supportant les barres coulissantes (7), dans laquelle l'unité scie (20) est montée sur les supports avant (12) ou arrière (13), les parties de support (6A, 6B) étant fixées à la base (2), ou l'unité scie (20) est montée sur les parties de support (6A, 6B), les barres coulissantes (7) étant fixées à la base (2), moyennant quoi l'unité scie (20) est rendue coulissante dans la direction avant-arrière, dans laquelle
    les parties de support (6A, 6B) sont constituées d'une première partie de support (6B) et d'une seconde partie de support (6A), dans laquelle la partie de roulement (8A) incluse dans la seconde partie de support (6A) y est insérée de manière lâche et la seconde partie de support (6A) comprend un élément de pression qui est configuré pour presser la partie de roulement (8A) de la seconde partie de support (6A) contre une surface intérieure de la seconde partie de support (6A) dans une direction perpendiculaire à un plan qui contient des axes des barres coulissantes (7) et la seconde partie de support (6A) inclut une seule partie de roulement (8A),
    caractérisée en ce que
    la partie de roulement (8B) incluse dans la première partie de support (6B) y est insérée par pression, la liaison des barres coulissantes (7) par au moins l'un des supports avant et arrière (12, 13) est établie par une structure dans laquelle les barres coulissantes (7) sont insérées de manière lâche dans l'au moins un des supports avant et arrière (12, 13) et y sont fixées par des vis et
    la première partie de support (6B) inclut deux parties de roulement (8B) agencées dans une direction axiale de la première partie de support (6B).
     
    2. Scie circulaire de type coulissant (1) selon la revendication 1, dans laquelle l'élément de pression comprend une vis de serrage (10) vissée dans la seconde partie de support (6A) pour entrer en contact avec une surface extérieure de la partie de roulement (8A) de la seconde partie de support (6A).
     
    3. Scie circulaire de type coulissant (1) selon la revendication 1, dans laquelle l'élément de pression comprend une paire de vis de serrage (10) qui se composent de vis de serrage avant et arrière (10) vissées au niveau de points avant et arrière, respectivement, dans la seconde partie de support (6A) pour entrer en contact avec une surface extérieure de la partie de roulement (8A) de la seconde partie de support (6A).
     
    4. Scie circulaire de type coulissant (1) selon l'une quelconque des revendications 1 à 3, dans laquelle les vis vissées dans l'au moins un parmi les supports avant et arrière (12, 13) sont engagées dans des rainures formées sur des surfaces périphériques des barres coulissantes (7).
     
    5. Scie circulaire de type coulissant (1) selon l'une quelconque des revendications 1 à 4, dans laquelle la liaison des barres coulissantes (7) par l'un des supports avant et arrière (12, 13) est établie par ajustement par pression.
     
    6. Scie circulaire de type coulissant (1) selon l'une quelconque des revendications 1 à 5, dans laquelle chacune des barres coulissantes (7) a la forme d'un tuyau.
     
    7. Scie circulaire de type coulissant (1) selon l'une quelconque des revendications 1 à 6, dans laquelle la partie de roulement (8A) et/ou (8B) comprend un roulement à bille linéaire.
     
    8. Scie circulaire de type coulissant (1) selon l'une quelconque des revendications 1 à 7, comprenant en outre une vis de blocage située dans l'une des parties de support (6A, 6B), la vis de blocage étant manipulable pour y être profondément vissée pour être pressée contre la barre coulissante (7) moyennant quoi un mouvement coulissant des barres coulissantes (7) est bloqué.
     
    9. Scie circulaire de type coulissant (1) selon l'une quelconque des revendications 1 à 8, comprenant en outre des crochets de cordon (15) situés en saillie au niveau de côtés des supports (12, 13), respectivement, et configurés pour supporter un cordon d'alimentation s'étendant entre eux.
     
    10. Scie circulaire de type coulissant (1) selon l'une quelconque des revendications 1 à 9, dans laquelle l'unité scie (20) comprend une partie de préhension (28) pour actionnement et une partie de préhension (30) pour transport.
     




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    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