(19)
(11)EP 3 749 549 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
08.12.2021 Bulletin 2021/49

(21)Application number: 18705567.8

(22)Date of filing:  06.02.2018
(51)International Patent Classification (IPC): 
B60P 7/08(2006.01)
F16G 11/12(2006.01)
(52)Cooperative Patent Classification (CPC):
B60P 7/083; F16G 11/12
(86)International application number:
PCT/EP2018/052941
(87)International publication number:
WO 2019/154478 (15.08.2019 Gazette  2019/33)

(54)

RATCHET LOAD BINDER WITH TWO HANDLES

RATSCHENLASTENBINDER MIT ZWEI HANDGRIFFEN

TENDEUR À CHAÎNE À ROCHET AYANT DEUX POIGNÉES


(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

(43)Date of publication of application:
16.12.2020 Bulletin 2020/51

(73)Proprietor: MARTENS, Koen
2450 Meerhout (BE)

(72)Inventor:
  • MARTENS, Koen
    2450 Meerhout (BE)

(74)Representative: Brantsandpatents bvba 
Pauline Van Pottelsberghelaan 24
9051 Ghent
9051 Ghent (BE)


(56)References cited: : 
DE-U1-202010 007 530
US-A- 4 130 269
  
      
    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] The invention pertains to the technical field of load binders with a ratchet mechanism.

    Background



    [0002] There remains a need in the art for an improved ratchet load binder.

    [0003] US 2,673,632 discloses a ratchet turnbuckle, but is not easy to operate manually.

    [0004] US 4,130,269 describes a ratchet load binder with telescopic shanks, but is equally not easy to operate manually.

    [0005] In US 8,505,879, a rigid tie down is disclosed involving a locking mechanism which may be difficult to operate and suffers increased wear.

    [0006] CA 2760240 discloses a ratchet load binder with removable lever, but lacks means to facilitate manual operation of the load binder.

    [0007] US 2014/0326935 discloses a ratcheting load binder with enclosed ratchet mechanism which is complex and may lack wear resistance.

    [0008] DE 20 2010 007530 discloses a ratchet mechanism involving tension straps.

    [0009] The present invention aims to resolve at least some of the problems mentioned above, with a load binder that is easy to operate manually.

    Summary of the invention



    [0010] The present invention provides a load binder according to claim 1.

    [0011] First, with two handles adequately provided, the invention is easier to operate and lasts longer than a state of the art load binder with one handle, because peak forces during operation are reduced. This is primarily due to an operator being able to spread force more evenly over time and/or over both hands.

    [0012] Particularly, with two handles and a separate ratchet wheels provided for each handle, in one mode of use, the operator may alternatingly operate the ratchet with one hand and the other hand. This allows to speed up the overall process of tightening or releasing the load binder, with on average two operations with a handle per cycle where a state of the art load binder only allows one operation per cycle. In one embodiment, this increased number of operations per cycle may be used to speed up the load binding usage. In a preferred embodiment, the screw threads on the two shanks are provided with a lower pitch than those for common load binders, e.g. half the pitch when compared to the state of the art load binder according to US 2,673,632. This results in a reduced tightening or releasing distance per operation, but the same overall speed per cycle. This may be advantageous since it allows a reduced peak force from the operator during each operation. This not only reduces the effort required from the operator, but also reduces the peak strain and torque exerted on several parts of the load binder, leading to less risk of load binder damage and reduced wear. Related, the effort of the operator is spread more evenly over time throughout each cycle.

    [0013] In another mode of use, the operator may operate both handles essentially simultaneously. This yields an exertion of the same force as with a prior art load binder but spread over two hands, which is carried over to the load binder in a more evenly distributed fashion. Particularly, where the operator exerts essentially equal force on both hands, there is a significant reduction of torque on the portions of the member extending between the two levers, which is beneficial for material wear, and also allows for a modified and potentially lighter design of the member.

    [0014] Second, with peak forces during operation reduced, less leverage is required during use, and the length of the handles may be reduced when compared to a prior art load binder. Shorter handles may be advantageous because they yield a lighter load binder, but also because a load binder with shorter handles is easier to manipulate in small spaces. Furthermore, it is a well-known problem of load binders that the handle may cause on obstruction. Where the load binder is in use, e.g. where the load binder is keeping a tightened cable in position, shorter handles provide for less hindrance when moving around the load binder. When the load binder is not in use, having shorter handles may allow for more convenient storage.

    [0015] Preferred embodiments and their advantages are discussed in the detailed description.

    Description of figures



    [0016] 

    Figure 1 is a side elevation view of a prior art load binder according to US 2,673,632.

    Figure 2 is a fragmentary sectional view of the ratchet mechanism used in the prior art load binder according to US 2,673,632.

    Figure 3 is a longitudinal sectional view of the prior art load binder according to US 2,673,632 on the section plane of the line A-A' in Figure 1.

    Figure 4 shows an example embodiment of the load binder according to the present invention.


    Detailed description of the invention



    [0017] The present invention concerns a load binder according to claim 1.

    [0018] In a preferred embodiment, the second handle is essentially identical to the first handle. For most applications and most operators, equal handles are convenient since they allow to distribute work evenly over both hands. In alternative embodiments, one handle may be shorter than another, e.g. to account for applications where one handle should be longer to increase leverage for this handle, e.g. because this handle is harder to reach for the operator than the other handle for reasons such as large height or limited access space.

    [0019] In a preferred embodiment of the invention, said first handle and said second handle are provided essentially symmetrically with respect to a middle section of said member. Hereby, the middle section of said member is a cross section of the member at half the length L of the member. In this document, the length L of the member corresponds to the distance between the axially outermost ends of the end portions of the member. Equivalently or alternatively, a distance between the axially outermost end of one end portion of the member and the first handle is substantially equal to the distance between the axially outermost end of the other end portion of the member and the second handle. Hereby, said distance between said first handle and said axially outermost end of said one end portion of the member may be defined as the distance between the middle section of the first ratchet wheel and said axially outermost end of said one end portion of the member. Likewise, the distance between said second handle and said axially outermost end of said other end portion of the member may be defined as the distance between the middle section of the second ratchet wheel and said axially outermost end of said other end portion of the member.

    [0020] In a preferred embodiment, said first and said second handle are separated by a spacing S equaling at least 40% of a length L of said member, preferably at least 45% of said length L, more preferably at least 50% of said length L. Hereby, said percentage may be obtained as the ratio of the distance between the middle sections of the first and second ratchet wheel and the length L of the member. This embodiment relates to the position of the handles being closer to the end portions of the member than would be the case if the handles where provided "uniformly" over the member, i.e. with the spacing S and the distance between the levers and the outermost ends of the end portions all equaling approximately 33% (1/3rd). An embodiment with S larger than 33% is advantageous because it allows an operator to exert force via the handles in close proximity to the inner screw threads of the member at each end portion, i.e. the place where rotational energy is converted into an axial translation. This allows for a more direct and more efficient transfer of force, particularly if the operator manipulates the handles simultaneously. Another advantage is the proximity of the ratchet wheels to the inner screw threads of the member at the end portions is that the securing of the ratchet wheel allows for additional "clutching", whereby the shanks are held more tightly by the portions of the member surrounding them.

    [0021] In a preferred embodiment, said member is composed of metal for at least 80 percent by volume, preferably of steel for at least 80 percent by volume. Such an embodiment allows for a sturdy and reliable design. Preferably a protective layer such as paint and/or a thin film coating is provided to protect the material against oxidation and/or to provide an operator with a better grip.

    [0022] According to yet another embodiment, said first and second handle (36) are composed of aluminum for at least 80 percent by volume. Such an embodiment is advantageous since this may reduce the overall weight of the load binder.

    [0023] In a preferred embodiment, said member comprises a first opening provided intermediate the first and second handle, said opening preferably provided on the middle section of said member. Such an opening may be advantageous in use of the load binder, since it prevents the built-up of air pressure inside the member when the shanks are drawn together. Likewise, it prevents an undesired underpressure when the shanks are spread apart. Additionally, it may allow liquids from external factors such as rain to flow away if present within the member. In a preferred embodiment where the handles are sufficiently spaced, the opening can be conveniently and efficiently placed in the middle of the member, where the effectivity of such an opening is highest. In a more preferred embodiment, comprises at least a second opening provided intermediate the first and second handle and essentially diametrically with respect to said opening, said opening and said second opening preferably provided on the middle section of said member. With more than one opening, said liquids from external factors such as rain may flow away in more positions of the load binder, mostly regardless of the exact angle over which the member is rotated. Moreover, a second opening positioning essentially diametrically with respect to the first opening allows to stick a wire or pointy object through the member, which may provide for a fixation point, facilitating storage and/or manufacturing and/or maintenance of the load binder. In a preferred embodiment, the handles are provided symmetrically and both openings are provided are provided on the middle section of the member, allowing further possible advantages in storage and/or manufacturing and/or maintenance of the load binder.

    [0024] In another preferred embodiment, said member comprises a central segment extending between and beyond the first and second handle having a first cross diameter and two end segments comprising said end portions comprising said inner screw threads in relatively opposite directions and having an essentially identical second cross diameter; wherein said first cross diameter of the central segment and said second cross diameter of the two end segments are such that the end segments may be received by the central segment in a clamping attachment. Such an embodiment is advantageous both in manufacturing and in use of the load binder. First, the manufacturing of the member is easier than for the prior art load binder, for which "upset" portions need to be provided and screw-threaded by separate machine processes which involve the complete member. In contrast, for a member comprising three segments, two end segments with appropriate diameter may simply be selected from a range of existing machine parts, so avoiding the need for providing upset portions. Related, the process of providing screw treads only involves the end segments, which are to be combined with the central segment only later on in the manufacturing. Second, in a preferred embodiment the handles are provided near the two end portions of the member, which advantageously combines with the clamping attachment of the end segments by the central segment. Particularly, in a preferred embodiment whereby the central segment extends not more than 50 mm beyond the axially outermost members next to each of the handles, more preferably not more than 30 mm, the clamping of the central segment by the ratchet wheel provides for additional support of the clamping of the end segments by the central segment, and hence for additional structural integrity in the use. In a further preferred embodiment, the central segment and the end segments comprise metal, preferably essentially consist of metal, and that said clamping attachment involves welding. This allows for enhanced structural integrity. In another further preferred embodiment, the central segment is tubular and is characterized by a first wall thickness with a first average value; wherein the two ends segments have an essentially identical circular inner cross section comprising said inner screw threads and an essentially identical polygonal outer cross section, preferably a hexagonal outer cross section; and wherein said two end segments are characterized by a second wall thickness with a second average value exceeding said first average value. This may be advantageous to ensure reliable clamping of the end segments by the central segment. Another advantage may be the ease to clamp the end segments during processing involving the threading, given their polygonal outer cross section.

    [0025] In yet another preferred embodiment, at least one of said first and said second handle is detachable; wherein preferably both said first and said second handle are detachable. A mechanism for detaching the handles may for instance be as described in US 8,851,255. Detachable handles may be advantageous in storage and use. Hereby, with the shorter handles allowed by the invention, the overall weight of the two handles may be equal or even lower than that of a prior art detachable handle such as the one of US 8,851,255.

    [0026] In a preferred embodiment, said two shanks comprise a first shank and a second shank; said first shank having an axially extending cylindrical void adapted to telescopically receive therewithin said second shank, said second shank having an outside diameter smaller than the inside diameter of said cylindrical void; wherein said second shank includes a screw-threaded length at least long enough to extend from the axially outermost end of one of said end portions to a position radially adjacent to the inner screw threads of the opposite end portion; wherein the screw threads of said second shank have a pitch which is greater than the pitch of the screw threads of said first shank; wherein said cylindrical void of said first shank has a length at least long enough to extend from the axially innermost end of one of said end portions to a position radially adjacent to the inner screw threads of the opposite end portion; and wherein said end portions of said member comprise inner screw threads adapted to the second shank having said outside diameter smaller than an outside diameter of the first shank and the screw threads of the second shank having greater pitch than the screw threads of the first shank. The advantage of such an embodiment lie in that the second shank may move a greater axial distance than the first shank when the load binder is worked, thereby permitting the second shank to have a length greater than the operative thread length of the first shank. In order to accommodate the penetration of the smaller second shank into the larger first shank, the larger member's cylindrical axial void extends past its operative thread length. The increased length and larger thread pitch of the second shank and the increased depth of the axial cylindrical void of the first shank account for the increased reach of the load binder.

    [0027] In yet another embodiment, for at least one of said first and second handle, said ratchet mechanism comprises a means for varying a transmission ratio between oscillatory displacement of the handle and rotary displacement of the member, said means preferably comprising a transmission ratchet wheel comprised in said first or second handle; said transmission ratio preferably based on a ratio of a number of teeth of the first or second ratchet wheel and a number of teeth of said transmission ratchet wheel; said transmission ratchet wheel adapted for converting an oscillatory displacement of the first or second handle at an oscillatory speed into a rotary displacement of said transmission wheel ratchet at a first rotary speed directly corresponding to said oscillatory speed; said transmission ratchet wheel further adapted for converting said rotary displacement of said transmission wheel ratchet into a rotary displacement of said first or second ratchet wheel mounted on said member at a second rotary speed essentially equal to the first rotary speed and the transmission ratio. Such a transmission allows to further customize the usage of the load binder to the needs of a specific operator and/or the given application.

    [0028] In a preferred embodiment, at least one of said distal ends is an eye; and said load binder further at least one hook rotatably mounted on said at least one eye according to a knee joint comprising a positioning axis, preferably by means of a knee pin extending along said positioning axis. In a further preferred embodiment, said distal ends are eyes; and said load binder further comprises two hooks rotatably mounted on said eyes according to a knee joint comprising a positioning axis, preferably by means of a knee pin extending along said positioning axis. This may be advantageous since it avoids undesired dislocation in the proximity of the eyes. This may for instance be useful in the exemplary case where the load binder is used to tighten a chain composed of metal links, whereby the links are relatively large when compared to the eyes, allowing smooth dislocation of the chain links with respect to the eyes. By using sufficiently large hooks, the effects of dislocation can be mitigated. In a further preferred embodiment, at least one of said knee joints comprises means, preferably both said knee joints comprising means, for securing a position of said knee joint with respect to said positioning axis according to a positioning angle (α), said means preferably relating to any or any of the following: friction-based positioning; recess-based positioning; locking-pin-based positioning; screw-based positioning. Such an embodiment may be advantageous in that it allows the operator, to some extent, to control the positioning angle, or, equivalently, blocking angle, during the securing of the load binder. This allows the operator to easily connect the hooks to further attachment means such as a cable, even if these attachment means are e.g. partially out of reach or present in some confined area that hinders maneuvering.

    [0029] In a preferred embodiment, the means for securing the position may relate to friction-based positioning that is based for instance on provisions for said knee pin extending along said positioning axis. For instance, the knee pin may be adapted to provide for friction with respect to rotation along the positioning axis, allowing the operator to control the positioning angle. In such an embodiment, the positioning angle can preferably be set continuously, i.e. taking on any angle in a given range, e.g. any value in the range 0 to 90 degrees, or any value in the range -90 degrees to 90 degrees.

    [0030] In another preferred embodiment, the means for securing the position may relate to recess-based positioning, whereby the knee joint preferably comprises a first surface comprising at least one protrusion and a second surface comprising at least one recess, said first and second surface adapted for interlocking of said protrusion and said recess for fixing said positioning angle. In such an embodiment, the positioning angle can preferably be set according to a discrete number of step values in the range 0 to 90 degrees, or any value in the range -90 degrees to 90 degrees.

    [0031] According to yet another embodiment, the means for securing the position may relate to locking-pin-based positioning, whereby the knee joint preferably comprises a first surface comprising at least a first hole and a second surface comprising at least a second hole, said first and second surface adapted for interlocking of said first surface and said second surface by means of a locking pin guided through set first hole and set second hole, for fixing said positioning angle. In such an embodiment, the positioning angle can preferably be set according to a discrete number of step values in the range 0 to 90 degrees, or any value in the range -90 degrees to 90 degrees.

    [0032] In another preferred embodiment, the means for securing the position may relate to screw-based positioning, whereby the knee joint preferably comprises said knee pin extending along said positioning axis, said knee pin comprises screw thread at one end extending beyond said knee joint, said screw-threaded end adapted for being receiving by a bolt in a releasably attachment for securing a position of said knee joint. In such an embodiment, the positioning angle can preferably be set continuously, i.e. taking on any angle in a given range, e.g. any value in the range 0 to 90 degrees, or any value in the range -90 degrees to 90 degrees. In another embodiment, the screw-based positioning is combined with said recess-based positioning, wherein a certain interlocking realized by means of recesses and protrusions may be secured by means of a screw, preferably by means of said knee pin comprising screw thread.

    [0033] The invention is further described by the following non-limiting example which further illustrates the invention, and is not intended to, nor should it be interpreted to, limit the scope of the invention.

    Example: prior art load binder and example load binder according to the present invention



    [0034] Figures 1-3 show different views of the prior art load binder according to US 2,673,632 which comprises a ratchet mechanism. Like characters of reference are employed to designate like parts.

    [0035] Figure 1 provides a side elevation view, whereas Figure 2 offers a fragmentary sectional view of the ratchet mechanism. Figure 3 provides a longitudinal sectional view according to the section plane of the line A-A' in Figure 1.

    [0036] The prior art load binder is provided with a ratchet turnbuckle 10, this embodying in its construction an elongated, preferably tubular member 12 having its opposite end portions "upset" by a machine process so as to thicken the wall of the tubular member in these regions, as at 13, and the upset end portions are screw-threaded in relatively opposite directions so as to accommodate correspondingly screw threaded shanks 14, 16 of a pair of eyes 18, 20 respectively, so that when the member 12 is rotated in one direction, the eyes 18, 20 are drawn together, while rotation of the member in a relatively opposite direction causes the eyes to spread apart. The eyes 20, 18, in turn, are connected by suitable links 22 to a pair of hooks 24 which are engageable with the links at the ends of a length of chain 26, so that by rotating the member 12, the chain 26 may be loosened or tightened, as desired.

    [0037] Rotation of the member 12 is effected by a ratchet mechanism which involves the provision of a ratchet wheel 28 which is suitably secured intermediate the ends of the member 12 and is rotatably mounted between mutually spaced side members 30, 32 which project from a hollow head or housing 34 on one end of an oscillatory handle 36.

    [0038] The head 34 also accommodates what may be referred to as a doubled-ended pawl 38 which is pivotally mounted on a pin or screw 40 extending between the members 30, 32, it being noted that a central portion of the pawl 38 is provided with an apertured ear, protuberance or lug 42, while the opposite side portions of the pawl assume the form of a pair of heels 44 which are selectively engageable with the ratchet wheel 28.

    [0039] Means are provided to swing the pawl 38 laterally, to one side or the other, thus engaging one or the other of the heels 44 of the pawl with the ratchet wheel 28, whereby oscillation of the handle 36 will impart rotation to the wheel 28 and to the associated member 12 in a predetermined direction. The direction of rotation of the member if may be reversed by simply pressing a heel of the pawl 38 into operative engagement with the ratchet wheel 28.

    [0040] Figure 4 shows an example embodiment of the load binder 1 according to the present invention. Similar to the prior art load binder, the load binder 1 comprises a single elongated, preferably tubular member 12 whereof the end portions have inner screw threads in relatively opposite directions. These are adapted to accommodate correspondingly threaded shanks 14, 16 of a pair of distal end points, preferably eyes 18, 20, so that when the member 12 is rotated in one direction, the eyes 18, 20 are drawn together, while rotation of the member in a relatively opposite direction causes the eyes to spread apart. In one embodiment, similar to the prior art load binder, the opposite inner end portions may be "upset" by a machine process so as to thicken the wall of the tubular member in these regions, whereby the end portions are screw-threaded.

    [0041] Different from the prior art load binder, the load binder 1 according to the present invention comprises two oscillatory handles 36 instead of one, each of the handles 36 actuating a separate ratchet turnbuckle 10. The second handle 36 is essentially identical to the first handle 36. Furthermore, the first handle 36 and said second handle 36 are provided essentially symmetrically with respect to a middle section 60 of said member 12. Furthermore, the first and said second handle 12 are separated by a spacing S equaling at least 40% of a length L of said member 12, preferably at least 45% of said length L. Hereby, the length L of the member 12 corresponds to the distance between the axially outermost ends 64, 66 of the end portions of the member 12. Furthermore, said percentage may be obtained as the ratio of the distance S between the middle sections of the first and second ratchet wheel and the length L of the member.

    [0042] The member 12 comprises a first and second opening 61 provided intermediate the first and second handle 36. Said first and second opening 61 are provided on the middle section 60 of said member 12 and are provided essentially diametrically with respect to each other.

    [0043] In a preferred embodiment not shown on Figure 4 and different from the prior art load binder, the elongate member 12 consists of three mutually attached member segments. It concerns one central segment extending between and beyond the two ratchet turnbuckles 10 and two end segments with opposite screw threading at the two ends of the member 12. Hereby, the diameters of the central segment and the two end segments are such that the end segments may be received by the central segment in a clamping attachment. The segments preferably comprise metal, and said clamping attachment is preferably further fixated by welding. Furthermore, in a preferred embodiment, the central segment may be tubular and be characterized by a first wall thickness, while the two ends segments may have a circular inner cross section comprising the screw thread and a polygonal outer cross section, such as a hexagonal outer cross section, with a second wall thickness of which the average value exceeds the first wall thickness. Such an embodiment is advantageous both in manufacturing and in use of the load binder 1. First, the manufacturing of the member 12 is much easier than for the prior art load binder, for which "upset" portions need to be provided and screw-threaded by separate machine processes which involve the complete member 12. In contrast, for a member 12 comprising three segments, two end segments with appropriate diameter may simply be selected from a range of existing machine parts, so avoiding the need for providing upset portions. Related, the process of providing screw treads only involves the end segments, which are to be combined with the central segment only later on in the manufacturing. Second, the resulting load binder advantageously combines the provision of the ratchet turnbuckles near the two ends of the member 12 with the clamping attachment of the end segments by the central segment. Particularly, in a preferred embodiment whereby the central segment extends not more than 50 mm beyond the axially outermost members 30, 32 next to each of the handles 36, more preferably not more than 30 mm, the clamping of the central segment by the ratchet wheel provides for additional support of the clamping of the end segments by the central segment, and hence for additional structural integrity in the use.

    [0044] Finally, the distal ends 18, 20 are eyes, and the load binder 1 further comprises two hooks 54 mounted on said eyes according to a knee joint involving a knee pin 52. The two hooks 54 are rotatably mounted on said eyes according to said knee joint. The knee joint comprises a positioning axis 70, whereby said knee pin 52 extends along said positioning axis 70. The knee joints comprise means for securing a position of said knee joint with respect to said positioning axis 70 according to a positioning angle α. The means for securing the position concern friction-based positioning, whereby the knee pin 52 is adapted to provide for friction with respect to rotation along the positioning axis 70, allowing the operator to control the positioning angle. The positioning angle α can be set continuously, i.e. taking on any angle in some given range, e.g. any value in the range -90 degrees to 90 degrees.


    Claims

    1. A load binder (1) comprising an axially extending elongate, preferably tubular, member (12), two shanks (14, 16), a first ratchet wheel (28) and a first oscillatory handle (36); said member (12) comprising end portions comprising inner screw threads in relatively opposite directions so as to accommodate said shanks (14, 16) which are correspondingly screw-threaded and which comprise distal ends (18, 20), preferably eyes; whereby rotation of the member (12) in one direction causes the distal ends (18, 20) to draw together and rotation of the member (12) in relatively opposite direction causes the distal ends (18, 20) to spread apart; whereby said rotation of said member (12) is effected by a ratchet mechanism which involves the provision of said first ratchet wheel (28) which is suitably secured intermediate the ends of the member (12) and is rotatably mounted between mutually spaced first side members (30, 32) which project from said first handle (36);
    characterized in that
    said load binder (1) comprises a second ratchet wheel (28) and a second oscillatory handle (36); whereby said ratchet mechanism involves the provision of said second ratchet wheel (28) which is suitably secured intermediate the ends of the member (12) and is rotatably mounted between mutually spaced second side members (30, 32) which project from said second handle (36).
     
    2. The load binder (1) according to claim 1, characterized in that the second handle (36) is essentially identical to the first handle (36).
     
    3. The load binder (1) according to claim 1 and 2, characterized in that said first handle (36) and said second handle (36) are provided essentially symmetrically with respect to a middle section (60) of said member (12).
     
    4. The load binder (1) according to claims 1-3, characterized in that said first and said second handle (36) are separated by a spacing (S) equaling at least 40% of a length (L) of said member (12), preferably at least 45% of said length (L).
     
    5. The load binder (1) according to claims 1-4, characterized in that said member is composed of metal for at least 80 percent by volume, preferably of steel for at least 80 percent by volume.
     
    6. The load binder (1) according to claims 1-5, characterized in that said first and second handle (36) are composed of aluminum for at least 80 percent by volume.
     
    7. The load binder (1) according to claims 1-6, characterized in that said member (12) comprises a first opening (61) provided intermediate the first and second handle (36), said opening preferably provided on the middle section (60) of said member (12).
     
    8. The load binder (1) according to claims 1-7, characterized in that said member (12) comprises a central segment extending between and beyond the first and second handle (36) having a first cross diameter and two end segments comprising said end portions comprising said inner screw threads in relatively opposite directions and having an essentially identical second cross diameter; wherein said first cross diameter of the central segment and said second cross diameter of the two end segments are such that the end segments may be received by the central segment in a clamping attachment.
     
    9. The load binder (1) according to claim 8, characterized in that the central segment and the end segments comprise metal, preferably essentially consist of metal, and that said clamping attachment involves welding.
     
    10. The load binder (1) according to claims 8-9, characterized in that the central segment is tubular and is characterized by a first wall thickness with a first average value; wherein the two ends segments have an essentially identical circular inner cross section comprising said inner screw threads and an essentially identical polygonal outer cross section, preferably a hexagonal outer cross section; and wherein said two end segments are characterized by a second wall thickness with a second average value exceeding said first average value.
     
    11. The load binder (1) according to claims 1-10, characterized in that at least one of said first and said second handle (36) is detachable; preferably in that both said first and said second handle (36) are detachable.
     
    12. The load binder (1) according to claims 1-11, characterized in that said two shanks (14, 16) comprise a first shank (14) and a second shank (16); said first shank (14) having an axially extending cylindrical void adapted to telescopically receive therewithin said second shank (16), said second shank (16) having an outside diameter smaller than the inside diameter of said cylindrical void; wherein said second shank (16) includes a screw-threaded length at least long enough to extend from the axially outermost end (66) of one of said end portions to a position radially adjacent to the inner screw threads of the opposite end portion; wherein the screw threads of said second shank (16) have a pitch which is greater than the pitch of the screw threads of said first shank (14); wherein said cylindrical void of said first shank (14) has a length at least long enough to extend from the axially innermost end of one of said end portions to a position radially adjacent to the inner screw threads of the opposite end portion; and wherein said end portions of said member (12) comprise inner screw threads adapted to the second shank (16) having said outside diameter smaller than an outside diameter of the first shank (14) and the screw threads of the second shank (16) having greater pitch than the screw threads of the first shank (14).
     
    13. The load binder (1) according to claims 1-12, characterized in that for at least one of said first and second handle (36) said ratchet mechanism comprises a means for varying a transmission ratio between oscillatory displacement of the handle and rotary displacement of the member (12), said means preferably comprising a transmission ratchet wheel comprised in said first or second handle (36); said transmission ratio preferably based on a ratio of a number of teeth of the first or second ratchet wheel (28) and a number of teeth of said transmission ratchet wheel; said transmission ratchet wheel adapted for converting an oscillatory displacement of the first or second handle (36) at an oscillatory speed into a rotary displacement of said transmission wheel ratchet at a first rotary speed directly corresponding to said oscillatory speed; said transmission ratchet wheel further adapted for converting said rotary displacement of said transmission wheel ratchet into a rotary displacement of said first or second ratchet wheel mounted on said member (12) at a second rotary speed essentially equal to the first rotary speed and the transmission ratio.
     
    14. The load binder (1) according to claims 1-13, characterized in that said distal ends (18,20) are eyes; and in that said load binder (1) further comprises at least one hook (54), preferably two hooks (54), rotatably mounted on said eyes according to a knee joint comprising a positioning axis (70), preferably by means of a knee pin (52) extending along said positioning axis (70).
     
    15. The load binder (1) according to claim 14, characterized in that at least one of said knee joints comprises means, preferably both said knee joints comprising means, for securing a position of said knee joint with respect to said positioning axis (70) according to a positioning angle (α), said means preferably relating to any or any of the following: friction-based positioning; recess-based positioning; locking-pin-based positioning; screw-based positioning.
     


    Ansprüche

    1. Lastbinder (1), ein sich axial erstreckendes längliches, vorzugsweise röhrenförmiges Element (12), zwei Schenkel (14, 16), ein erstes Sperrrad (28) und einen ersten schwingfähigen Griff (36) umfassend, wobei das Element (12) Endabschnitte umfasst, die innere Schraubgewinde in zueinander entgegengesetzten Richtungen umfassen, um die Schenkel (14, 16) aufzunehmen, die mit entsprechendem Schraubgewinde versehen sind und die ferne Ende (18, 20) umfassen, vorzugsweise Ösen, wobei die Drehung des Elements (12) in eine Richtung verursacht, dass die fernen Enden (18, 20) zusammengezogen werden, und die Drehung des Elements (12) in die dazu entgegengesetzte Richtung verursacht, dass die fernen Enden auseinandergespreizt werden, wobei die Drehung des Elements (12) durch einen Ratschenmechanismus bewirkt wird, was das Bereitstellen des ersten Sperrrades (28) beinhaltet, das geeignet zwischen den Enden des Elements (12) gesichert ist und drehbar zwischen gegenseitig beabstandeten ersten Seitenelementen (30, 32) montiert ist, die aus dem ersten Griff (36) hervorstehen,
    dadurch gekennzeichnet, dass
    der Lastbinder (1) ein zweites Sperrrad (28) und einen zweiten schwingfähigen Griff (36) umfasst, wobei der Ratschenmechanismus das Bereitstellen des zweiten Sperrrades (28) beinhaltet, das geeignet zwischen den Enden des Elements (12) gesichert ist und drehbar zwischen gegenseitig beabstandeten zweiten Seitenelementen (30, 32) montiert ist, die aus dem zweiten Griff (36) hervorstehen.
     
    2. Lastbinder (1) nach Anspruch 1, dadurch gekennzeichnet, dass der zweite Griff (36) im Wesentlichen identisch mit dem ersten Griff (36) ist.
     
    3. Lastbinder (1) nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass der erste Griff (36) und der zweite Griff (36) in Bezug auf einen mittleren Abschnitt (60) des Elements (12) im Wesentlichen symmetrisch bereitgestellt sind.
     
    4. Lastbinder (1) nach den Ansprüchen 1-3, dadurch gekennzeichnet, dass der erste und der zweite Griff (36) durch einen Zwischenraum (S) getrennt sind, der gleich mindestens 40 % einer Länge (L) des Elements (12) ist, vorzugsweise mindestens 45 % der Länge (L).
     
    5. Lastbinder (1) nach den Ansprüchen 1-4, dadurch gekennzeichnet, dass das Element zu mindestens 80 Volumenprozent aus Metall besteht, vorzugsweise zu mindestens 80 Volumenprozent aus Stahl.
     
    6. Lastbinder (1) nach den Ansprüchen 1-5, dadurch gekennzeichnet, dass der erste und der zweite Griff (36) zu mindestens 80 Volumenprozent aus Aluminium bestehen.
     
    7. Lastbinder (1) nach den Ansprüchen 1-6, dadurch gekennzeichnet, dass das Element (12) eine erste Öffnung (61) umfasst, die zwischen dem ersten und dem zweiten Griff (36) bereitgestellt ist, wobei die Öffnung vorzugsweise an dem mittleren Abschnitt (60) des Elements (12) bereitgestellt ist.
     
    8. Lastbinder (1) nach den Ansprüchen 1-7, dadurch gekennzeichnet, dass das Element (12) ein zentrales Segment umfasst, das sich zwischen dem ersten und dem zweiten Griff (36) und über diese hinaus erstreckt, einen ersten Querdurchmesser und zwei Endsegmente aufweist, welche die Endabschnitte umfassen, die die inneren Schraubgewinde in zueinander entgegengesetzten Richtungen umfassen, und die einen im Wesentlichen identischen zweiten Querdurchmesser aufweisen, wobei der erste Querdurchmesser des zentralen Segments und der zweite Querdurchmesser der zwei Endsegmente derart sind, dass die Endsegmente von dem zentralen Segment in einer Klemmbefestigung aufgenommen werden können.
     
    9. Lastbinder (1) nach Anspruch 8, dadurch gekennzeichnet, dass das zentrale Segment und die Endsegmente Metall umfassen, vorzugsweise im Wesentlichen aus Metall bestehen und dass die Klemmbefestigung Schweißen beinhaltet.
     
    10. Lastbinder (1) nach den Ansprüchen 8-9, dadurch gekennzeichnet, dass das zentrale Segment röhrenförmig und durch eine erste Wandungsdicke mit einem ersten Mittelwert gekennzeichnet ist, wobei die zwei Endsegmente einen im Wesentlichen identischen kreisrunden Innenquerschnitt aufweisen, der die inneren Schraubgewinde umfasst, und einen im Wesentlichen identischen mehreckigen Außenquerschnitt, vorzugsweise einen sechseckigen Außenquerschnitt, und wobei die zwei Endsegmente durch eine zweite Wandungsdicke mit einem zweiten Mittelwert gekennzeichnet sind, der den ersten Mittelwert übersteigt.
     
    11. Lastbinder (1) nach den Ansprüchen 1-10, dadurch gekennzeichnet, dass mindestens einer von dem ersten und dem zweiten Griff (36) lösbar ist, vorzugsweise dadurch, dass sowohl der erste als auch der zweite Griff (36) lösbar sind.
     
    12. Lastbinder (1) nach den Ansprüchen 1-11, dadurch gekennzeichnet, dass die zwei Schenkel (14, 16) einen ersten Schenkel (14) und einen zweiten Schenkel (16) umfassen, wobei der erste Schenkel (14) einen sich axial erstreckenden zylinderförmigen Hohlraum aufweist, der dafür eingerichtet ist, den zweiten Schenkel (16) teleskopartig in sich aufzunehmen, wobei der zweite Schenkel (16) einen Außendurchmesser aufweist, der kleiner als der Innendurchmesser des zylinderförmigen Hohlraums ist, wobei der zweite Schenkel (16) eine Schraubgewindelänge beinhaltet, die zumindest lang genug ist, um sich aus dem axial äußersten Ende (66) eines der Endabschnitte bis zu einer Position zu erstrecken, die radial an das innere Schraubgewinde des gegenüberliegenden Endabschnitts angrenzt, wobei das Schraubgewinde des zweiten Schenkels (16) eine Steigung aufweisen, die größer als die Steigung des Schraubgewindes des ersten Schenkels (14) ist, wobei der zylinderförmige Hohlraum des ersten Schenkels (14) eine Länge aufweist, die zumindest lang genug ist, um sich von dem axial innersten Ende eines der Endabschnitte bis zu einer Position zu erstrecken, die radial an das innere Schraubgewinde des gegenüberliegenden Endabschnitts angrenzt, und wobei die Endabschnitte des Elements (12) innere Schraubgewinde umfassen, die an den zweiten Schenkel (16) angepasst sind, der einen Außendurchmesser aufweist, der kleiner als ein Außendurchmesser des ersten Schenkels (14) ist, und das Schraubgewinde des zweiten Schenkels (16) eine größere Steigung aufweist als das Schraubgewinde des ersten Schenkels (14).
     
    13. Lastbinder (1) nach den Ansprüchen 1-12, dadurch gekennzeichnet, dass für mindestens einen des ersten und des zweiten Griffs (36) der Ratschenmechanismus Mittel zum Variieren eines Übertragungsverhältnisses zwischen schwingender Verlagerung des Griffs und drehender Verlagerung des Elements (12) umfasst, wobei die Mittel vorzugsweise ein Übertragungssperrrad umfassen, das in dem ersten oder dem zweiten Griff (36) enthalten ist, wobei das Übertragungsverhältnis vorzugsweise auf einem Verhältnis einer Anzahl von Zähnen des ersten oder zweiten Sperrrades (28) und einer Anzahl von Zähnen des Übertragungssperrrades basiert, wobei das Übertragungssperrrad dafür eingerichtet ist, eine schwingende Verlagerung des ersten oder zweiten Griffs (36) mit einer Schwinggeschwindigkeit in eine drehende Verlagerung des Übertragungssperrrades mit einer ersten Drehgeschwindigkeit, die der Schwinggeschwindigkeit direkt entspricht, umzuwandeln, wobei das Übertragungssperrrad ferner dafür eingerichtet ist, die drehende Verlagerung des Übertragungssperrrades in eine drehende Verlagerung des an das Element (12) montierten ersten oder zweiten Sperrrades mit einer zweiten Drehgeschwindigkeit umzuwandeln, die im Wesentlichen gleich der ersten Drehgeschwindigkeit und dem Übertragungsverhältnis ist.
     
    14. Lastbinder (1) nach den Ansprüchen 1-13, dadurch gekennzeichnet, dass die fernen Enden (18, 20) Ösen sind, und dadurch, dass der Lastbinder (1) ferner mindestens einen Haken (54) umfasst, vorzugsweise zwei Haken (54), die gemäß einem Kniegelenk, das eine Positionierungsachse (70) umfasst, drehbar an die Ösen montiert sind, vorzugsweise mittels eines Gelenkstifts (52), der sich entlang der Positionierungsachse (70) erstreckt.
     
    15. Lastbinder (1) nach Anspruch 14, dadurch gekennzeichnet, dass mindestens eines der Kniegelenke, vorzugsweise beide Kniegelenke, Mittel zum Sichern einer Position des Kniegelenks in Bezug auf die Positionierungsachse (70) gemäß einem Winkel (α) umfassen, wobei die Mittel vorzugsweise eines oder eines des Folgenden betreffen: reibungsbasierte Positionierung, vertiefungsbasierte Positionierung, sperrstiftbasierte Positionierung, schraubenbasierte Positionierung.
     


    Revendications

    1. Tendeur à chaîne (1) comprenant un élément (12) allongé, de préférence tubulaire, s'étendant axialement, deux tiges (14, 16), une première roue à rochet (28) et une première poignée oscillante (36) ; ledit élément (12) comprenant des parties d'extrémité comprenant des filetages intérieurs de vis dans des directions relativement opposées de façon à loger lesdites tiges (14, 16) qui sont filetées de manière correspondante et qui comprennent des extrémités distales (18, 20), de préférence des œillets ; moyennant quoi la rotation de l'élément (12) dans une direction amène les extrémités distales (18, 20) à se rapprocher et la rotation de l'élément (12) dans une direction relativement opposée amène les extrémités distales (18, 20) à s'écarter; moyennant quoi ladite rotation dudit élément (12) est effectuée par un mécanisme à rochet qui implique la prévision de ladite première roue à rochet (28) qui est fixée de manière appropriée entre les extrémités de l'élément (12) et est montée de manière rotative entre des premiers éléments latéraux mutuellement espacés (30, 32) qui font saillie à partir de ladite première poignée (36) ;
    caractérisé en ce que
    ledit tendeur à chaîne (1) comprend une seconde roue à rochet (28) et une seconde poignée oscillante (36) ; moyennant quoi ledit mécanisme à rochet implique la prévision de ladite seconde roue à rochet (28) qui est fixée de manière appropriée entre les extrémités de l'élément (12) et est montée de manière rotative entre des seconds éléments latéraux mutuellement espacés (30, 32) qui font saillie à partir de ladite seconde poignée (36).
     
    2. Tendeur à chaîne (1) selon la revendication 1, caractérisé en ce que la seconde poignée (36) est essentiellement identique à la première poignée (36).
     
    3. Tendeur à chaîne (1) selon la revendication 1 et 2, caractérisé en ce que ladite première poignée (36) et ladite seconde poignée (36) sont prévues essentiellement symétriquement par rapport à une section médiane (60) dudit élément (12).
     
    4. Tendeur à chaîne (1) selon les revendications 1-3, caractérisé en ce que ladite première et ladite seconde poignée (36) sont séparées par un espacement (S) égal à au moins 40 % d'une longueur (L) dudit élément (12), de préférence au moins 45 % de ladite longueur (L).
     
    5. Tendeur à chaîne (1) selon les revendications 1-4, caractérisé en ce que ledit élément est composé de métal pour au moins 80 pour cent en volume, de préférence d'acier pour au moins 80 pour cent en volume.
     
    6. Tendeur à chaîne (1) selon les revendications 1-5, caractérisé en ce que ladite première et ladite seconde poignée (36) sont composées d'aluminium pour au moins 80 pour cent en volume.
     
    7. Tendeur à chaîne (1) selon les revendications 1-6, caractérisé en ce que ledit élément (12) comprend une première ouverture (61) prévue entre la première et la seconde poignée (36), ladite ouverture de préférence prévue sur la section médiane (60) dudit élément (12).
     
    8. Tendeur à chaîne (1) selon les revendications 1-7, caractérisé en ce que ledit élément (12) comprend un segment central s'étendant entre et au-delà de la première et de la seconde poignée (36) présentant un premier diamètre transversal et deux segments d'extrémité comprenant lesdites parties d'extrémité comprenant lesdits filetages intérieurs de vis dans des directions relativement opposées et présentant un second diamètre transversal essentiellement identique ; dans lequel ledit premier diamètre transversal du segment central et ledit second diamètre transversal des deux segments d'extrémité sont tels que les segments d'extrémité peuvent être reçus par le segment central dans une fixation de serrage.
     
    9. Tendeur à chaîne (1) selon la revendication 8, caractérisé en ce que le segment central et les segments d'extrémité comprennent du métal, de préférence sont essentiellement constitués de métal, et en ce que ladite fixation de serrage implique un soudage.
     
    10. Tendeur à chaîne (1) selon les revendications 8-9, caractérisé en ce que le segment central est tubulaire et est caractérisé par une première épaisseur de paroi ayant une première valeur moyenne ; dans lequel les deux segments d'extrémité présentent une section transversale intérieure circulaire essentiellement identique comprenant lesdits filetages intérieurs de vis et une section transversale extérieure polygonale essentiellement identique, de préférence une section transversale extérieure hexagonale ; et dans lequel lesdits deux segments d'extrémité sont caractérisés par une seconde épaisseur de paroi ayant une seconde valeur moyenne dépassant ladite première valeur moyenne.
     
    11. Tendeur à chaîne (1) selon les revendications 1-10, caractérisé en ce qu'au moins l'une de ladite première et de ladite seconde poignée (36) est détachable ; de préférence en ce que ladite première et ladite seconde poignée (36) sont toutes deux détachables.
     
    12. Tendeur à chaîne (1) selon les revendications 1-11, caractérisé en ce que lesdites deux tiges (14, 16) comprennent une première tige (14) et une seconde tige (16) ; ladite première tige (14) présentant un vide cylindrique s'étendant axialement adapté pour recevoir de manière télescopique à l'intérieur de celui-ci ladite seconde tige (16), ladite seconde tige (16) présentant un diamètre extérieur plus petit que le diamètre intérieur dudit vide cylindrique ; dans lequel ladite seconde tige (16) inclut une longueur filetée au moins suffisamment longue pour s'étendre de l'extrémité axialement la plus à l'extérieur (66) de l'une desdites parties d'extrémité à une position radialement adjacente aux filetages intérieurs de vis de la partie d'extrémité opposée ; dans lequel les filetages de vis de ladite seconde tige (16) présentent un pas qui est supérieur au pas des filetages de vis de ladite première tige (14) ; dans lequel ledit vide cylindrique de ladite première tige (14) présente une longueur au moins suffisamment longue pour s'étendre de l'extrémité axialement la plus à l'intérieur de l'une desdites parties d'extrémité à une position radialement adjacente aux filetages intérieurs de vis de la partie d'extrémité opposée ; et dans lequel lesdites parties d'extrémité dudit élément (12) comprennent des filetages intérieurs de vis adaptés à la seconde tige (16) présentant ledit diamètre extérieur plus petit qu'un diamètre extérieur de la première tige (14) et les filetages de vis de la seconde tige (16) présentant un pas supérieur aux filetages de vis de la première tige (14).
     
    13. Tendeur à chaîne (1) selon les revendications 1-12, caractérisé en ce que pour au moins l'une de ladite première et de ladite seconde poignée (36) ledit mécanisme à rochet comprend un moyen pour faire varier un rapport de transmission entre un déplacement oscillatoire de la poignée et un déplacement rotatif de l'élément (12), ledit moyen comprenant de préférence une roue à rochet de transmission comprise dans ladite première ou seconde poignée (36) ; ledit rapport de transmission de préférence basé sur un rapport d'un nombre de dents de la première ou de la seconde roue à rochet (28) et d'un nombre de dents de ladite roue à rochet de transmission ; ladite roue à rochet de transmission adaptée pour convertir un déplacement oscillatoire de la première ou de la seconde poignée (36) à une vitesse oscillatoire en un déplacement rotatif dudit rochet de roue de transmission à une première vitesse de rotation correspondant directement à ladite vitesse oscillatoire ; ladite roue à rochet de transmission en outre adaptée pour convertir ledit déplacement rotatif dudit rochet de roue de transmission en un déplacement rotatif de ladite première ou seconde roue à rochet montée sur ledit élément (12) à une seconde vitesse de rotation essentiellement égale à la première vitesse de rotation et au rapport de transmission.
     
    14. Tendeur à chaîne (1) selon les revendications 1-13, caractérisé en ce que lesdites extrémités distales (18,20) sont des œillets; et en ce que ledit tendeur à chaîne (1) comprend en outre au moins un crochet (54), de préférence deux crochets (54), montés de manière rotative sur lesdits œillets selon un joint à rotule comprenant un axe de positionnement (70), de préférence au moyen d'une broche de rotule (52) s'étendant le long dudit axe de positionnement (70).
     
    15. Tendeur à chaîne (1) selon la revendication 14, caractérisé en ce qu'au moins l'un desdits joints à rotule comprend un moyen, de préférence lesdits joints à rotule comprenant tous deux un moyen, pour fixer une position dudit joint à rotule par rapport audit axe de positionnement (70) selon un angle de positionnement (α), ledit moyen de préférence relatif à l'un quelconque ou à l'un quelconque des suivants : positionnement basé sur le frottement ; positionnement basé sur un évidement ; positionnement basé sur une broche de verrouillage ; positionnement basé sur une vis.
     




    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