Mounting fixture for use on a logging vehicle with a bending and extending arm

Abstract

To provide an attaching tool that can easily attach / detach various objects to an arm in a work vehicle for collecting material having a bending / stretching arm.SOLUTION: A clamp attaching tool 100 uses: a rope 6 attached to an object to be collected W; a work vehicle 5 for collecting material having a bending / stretching arm 55; and a clamp 4 which is made up of a fastener 41 and abutting tools 42, and in which the fastener 41 and the abutting tools 42 form an insertion passage 44 for the rope 6, and is used for a material collection work of collecting the object to be collected W. The clamp attaching tool comprises: exchange pin members 1 which replace an idler link pin used for idler links 58 of the arm 55; and attaching members 2 which are attached to the exchange pin members 1. The attaching members 2 attach the fastener 41 of the clamp in a rotatable manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an attachment device for use on a logging vehicle having a bending and extending arm, and more specifically to an attachment device for use on a logging vehicle having a bending and extending arm, which comprises a pin member used on the link section of the arm and an attachment member attached to the pin member, and which uses this attachment member to attach various objects. [Background technology]

[0002] For example, in forestry, when timber is collected near a logging vehicle, the timber is collected using a winch attached to the boom or rotating body of the logging vehicle, which has a boom and arm. Specifically, a rope (here, metal wire and non-metallic rope are collectively referred to as "rope") is extended from the winch, passed through a pulley attached near the end of the arm, hooked onto the timber, and then wound up by the winch.

[0003] Logging methods that rely solely on the power of a winch, such as those described in Patent Document 1, require a large pulling force from the winch. This necessitates a very expensive winch. Therefore, the inventors of the present application came up with a logging method that utilizes the bending and rotational force of an arm, as described in Patent Document 2. In this method, a clamp is attached to the arm, and when the arm is extended, the rope is movable through the clamp's insertion passage, and when the arm is bent, the rope is immobilized through the clamp's insertion passage.

[0004] Furthermore, the clamp used in this method, such as that described in Non-Patent Document 1, has the problem that when the fixed rope is pulled strongly in the fixed direction (when the arm is bent), the tightening part bites into the rope strongly, and even if the clamp is then pulled with a predetermined tensile force in the movable direction (when the arm is extended), the tightening part bites into the rope, preventing the tightening part from rotating in the movable direction, and the rope remains fixed, preventing the clamp from moving. Therefore, the inventor of the present application has applied for a patent for a clamp device that solves this problem, as shown in Patent Document 3. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-315226 [Patent Document 2] Japanese Patent Application Publication No. 2018-11514 [Patent Document 3] Patent Publication No. 2021-116189 [Non-patent literature]

[0006] [Non-Patent Document 1] KITO Corporation, [online], KITO Clip, a dedicated wire rope fastening device, available online at https: / / www.kito.co.jp / products / lb / _id_61 / Summary of the Invention [Problem to be solved by the invention]

[0007] Attaching the clamp of the second embodiment in Patent Document 2 or the clamp in Patent Document 3 to an arm requires processing such as drilling holes or welding on the arm of the logging vehicle. Logging vehicles are very expensive, so many people lease them rather than purchase them. However, the method of attaching the clamp by welding or other processing as in Patent Documents 2 and 3 is difficult to apply to leased logging vehicles due to lease contract issues.

[0008] Furthermore, logging vehicles are not often dedicated to logging, and many are versatile vehicles that are used for other purposes as well. Therefore, clamps are not needed when performing tasks other than logging, and there is a strong demand for the clamps to be removable if possible. Therefore, there has been a demand for a clamp that can be easily attached and detached.

[0009] Furthermore, in a typical logging operation using a winch and wire as shown in Figure 7 of Patent Document 1, a pulley (60) is attached via a hook (56a) fixed to the tip of the arm (56) of the logging vehicle. Even when attaching such a pulley, welding the hook to the arm can cause the same problems as those described above.

[0010] In addition to using a winch for logging, there are also cases where the object is restrained with a band and the band is hooked onto a hook attached to the tip of the arm of a logging vehicle, thereby slightly moving the object's position.

[0011] In particular, at disaster sites where heavy machinery is in short supply, the use of work vehicles with bending and extending arms is important, and it is quite conceivable that there will be situations where an object needs to be moved quickly using a band. Therefore, attaching a hook to hang the band poses the same problems as with winches and pulleys.

[0012] Furthermore, in emergencies such as disaster sites, it is conceivable that a work vehicle with a bending and extending arm could be used as a simple lighting device by attaching a light source to the end of the bending and extending arm. Attaching a light source to the end of the arm is extremely convenient because the height and position of the light source can be easily adjusted by bending and extending the arm. Therefore, in work vehicles with bending and extending arms, it is widely conceivable to attach various objects to the end of the arm in addition to the clamps, pulleys, and hooks described above, and such attachments also pose the same problem.

[0013] The present invention has been made to solve such problems, and aims to provide an attachment device that allows various items to be easily attached and detached to the arm of a logging vehicle having a bending and extending arm. [Means for solving the problem]

[0014] In order to solve the above problem, the mounting device used in a logging vehicle having a bending and extending arm of the present invention is characterized by comprising a pin member used in the link portion of the arm and a mounting member attached to the pin member.

[0015] When attaching various objects such as clamps, pulleys, hooks, and light sources to the arm, these can be attached using the link portion of the arm with a mounting fixture composed of a pin member used in the link portion and a mounting member attached to the pin member, eliminating the need for processing such as welding. Furthermore, when not needed, the clamp or the like can be removed from the mounting member, and the mounting member can also be removed from the pin member, so the mounting fixture used on a logging vehicle with a bending and extending arm of the present invention allows various objects to be easily attached and detached to the arm. In the present invention, an idler link or a bucket link can be used as the link portion of the arm.

[0016] Furthermore, it is preferable that the attachment used in a logging vehicle having a bending and extending arm of the present invention further comprises a gap member for adjusting the gap between the pin member and the arm in the insertion direction of the pin member.

[0017] As described above, the clamp is provided with an adjustment member for adjusting the gap between the pin member and the arm in the insertion direction, so that the clamp can be attached to a variety of logging vehicles with different arm dimensions.

[0018] It is also preferable that the attachment tool for use with a logging vehicle having a bending and extending arm of the present invention further comprises a rotation preventing member for preventing rotation of the attachment member. This configuration allows various objects to be attached to a variety of logging vehicles with different arm dimensions. The attachment member does not rotate independently, but moves more reliably as a unit with the arm.

[0019] In addition, in the attachment used in the logging vehicle having a bending and extending arm of the present invention, it is preferable that the pin member is a replacement pin member that is different from the existing one used in the logging vehicle.

[0020] With such a replacement pin member, there is a possibility that the length may be insufficient when using an existing pin member as an attachment, but if a replacement pin member is made specifically for the purpose and is different from the existing pin member, there will be no problem such as insufficient length.

[0021] In addition, the attachment device used in the logging vehicle with a bending and extending arm of the present invention is used for moving work to move the object using a string-like member attached to the object and a holder that holds the string-like member, and the attachment member is used to attach the holder.

[0022] The holder can be easily attached when attaching a holder that holds a string-like member, such as a pulley as in Patent Document 1, or a hook. Note that various types of string-like members can be used, such as ropes, wires, chains, and bands, as long as they can restrain the object.

[0023] Furthermore, it is preferable that the attachment device used in the logging vehicle of the present invention having a bending and extending arm is such that the moving work of moving the object is logging work of collecting logging objects, the holding device is a clamp consisting of a fastening device and a contact device, and the fastening device and the corresponding contact device form a passage for the rope, and the attachment member is such that the fastening device of the clamp is rotatably attached.

[0024] As a result, clamps that collect timber from a logging target by pulling a rope through bending and stretching of the arms of a logging vehicle, as in Patent Documents 2 and 3, are attached using a pin member and mounting member used on the link part of the arm, so they can be easily attached without the need for processing such as drilling holes in the arm or welding. Therefore, even the logging method as in Patent Document 2, developed by the present inventor, can be easily carried out using, for example, a leased logging vehicle.

[0025] Furthermore, it is more preferable to use replacement pin members in place of existing pin members used in idler links or bucket links in the present invention. This is because existing pin members may be too short to attach attachment members, and using longer replacement pin members instead of existing pin members allows for more stable attachment of attachment members. Furthermore, idler links are preferred as link sections. This is because bucket links are closer to the tip of the arm, resulting in a longer traction stroke, making logging operations more efficient, whereas bucket links have attachments such as a bucket or grapple at the tip of the arm, which may get in the way of logging operations. Furthermore, when the holding tool is a clamp, it is preferable to provide the mounting member with a lock release means for pressing the fastener to widen the insertion path.

[0026] This allows the rope to be automatically unlocked when the object to be collected is pulled to a predetermined position with the rope, and also allows the rope to be forcibly released if it has become tightly gripped by the clamp.

[0027] Furthermore, if the holding device is a clamp, it is preferable to further include a rotation-preventing member that prevents the mounting member from rotating. This configuration allows the clamp to be attached to a variety of logging vehicles with different arm dimensions. Furthermore, since the mounting member does not rotate independently but moves more reliably as a unit with the arm, in the case of a mounting member to which an unlocking means is attached, the unlocking means also does not rotate, so the operation of the unlocking means is stable when unlocking according to the bending and extension angle of the arm. [Brief explanation of the drawings]

[0028] [Figure 1]FIG. 1A is a side view showing the clamp mounting device of the first embodiment of the present invention attached to a logging vehicle, FIG. 1B is an enlarged oblique view of the clamp mounting device portion of FIG. 1A, and FIG. 1C is an oblique view seen from a different direction than FIG. 1B. [Figure 2] 1A is a perspective view seen from a direction different from that of FIG. 1C, and FIG. 1B is a perspective view seen from a direction different from that of FIG. [Figure 3] A is a cross-sectional view showing the state where the clamp insertion passage narrows and the object to be collected is moved closer with the rope, B is a cross-sectional view showing the state where the clamp insertion passage widens and the clamp can be extended toward the object to be collected, and C is a cross-sectional view showing the state where the lock is released by the lock release means. [Figure 4] FIG. 1A is a perspective view showing the configuration of the main parts of the clamp fixture, FIG. 1B is a perspective view seen from a different direction than A, and FIG. 1C is a perspective view showing the welded parts of the replacement pin member. [Figure 5] 1A is a side view showing the clamp attachment attached to a logging vehicle, and FIG. 1B is a cross-sectional view of FIG. 1A taken along the line VB-VB. [Figure 6] 10A and 10B are perspective views showing the procedure for attaching the clamp attachment to the logging vehicle. [Figure 7] 10A is a perspective view showing the configuration of a clamp attachment tool of a second embodiment, FIG. 10B is a view of A as seen from the front, and FIG. 10C is a view of A as seen from the side. [Figure 8] 1A is a perspective view showing a state in which a clamp attachment device of a second embodiment is attached to a logging vehicle, and FIG. 1B is an enlarged cross-sectional view of a pin portion of FIG. [Figure 9] 10A is a side view showing a state in which a pulley is attached to the mounting fixture of the third embodiment, and FIG. 10B is a front view of FIG. [Figure 10] 10A is a side view showing a state in which a hook is attached to the mounting fixture of the fourth embodiment, and FIG. 10B is a front view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0029] The following describes the mode for carrying out the present invention with reference to the embodiments and drawings, but the embodiments shown below are not intended to limit the present invention to those described herein, and the present invention is equally applicable to various modifications without departing from the technical idea set forth in the claims. Note that in the drawings used for explanation in this specification, each component is shown at a different scale so that it can be recognized on the drawing, and the components are not necessarily shown in proportion to their actual dimensions.

[0030] The attachment device for use with a logging vehicle having a bending and extending arm of the present invention is characterized by comprising a pin member for use in the link portion of the arm and an attachment member attached to the pin member. More specifically, this attachment device is used in moving work to move an object using a string-like member attached to the object and a holder that holds the string-like member, and the attachment member is used to attach the holder that holds the string-like member.

[0031] Specifically, the object in the moving work is an object that needs to be moved, regardless of the distance, such as lumber in forestry or waste materials at disaster sites. The string-like member attached to the object is used to restrain the object, and specifically includes a rope, wire, chain, belt, etc. The holder that holds the string-like member is specifically a clamp, pulley, hook, etc. The following embodiments will be described based on these specific examples.

[0032] [First embodiment] The main parts of a clamp attachment device 100 according to a first embodiment of the present invention will be described using Figures 1 to 5. Figures 1 and 2 show the clamp attachment device 100 attaching a clamp 4 to a logging vehicle 5, Figure 3 shows the operation of the clamp 4, and Figures 4 and 5 show the configuration of the main parts of the clamp attachment device 100. Note that the present invention relates to the clamp attachment methods described in Patent Documents 2 and 3, which were previously invented by the present inventor, and therefore the logging method and the principles of the clamp 4 according to this embodiment are basically the same as those described in those patent documents.

[0033] The clamp attachment 100 of this embodiment is a specific example of an attachment of the present invention, and as shown in FIG. 1A , is attached to a logging vehicle 5 equipped with a bucket 51. The logging vehicle 5 rotates a boom 53 by extending and retracting a boom cylinder 52, rotates an arm 55 at the tip of the boom 53 by extending and retracting an arm cylinder 54, and rotates a bucket 51 at the tip of the arm 55 by extending and retracting a bucket cylinder 56. To rotate the bucket 51, a so-called idler link 58 and a bucket link located closer to the tip are provided at the tip of the arm 55. In this embodiment, the clamp attachment 100 is attached using the position of an idler link pin 57 used in the idler link 58 at the tip of the rotatable arm 55, and the clamp 4 attached to the clamp attachment 100 pulls in a logging target object W (e.g., lumber in forestry) as the arm 55 bends and extends due to the rotation of the boom 53 and arm 55. Although the enlarged view of FIG. 1A shows it as an idler link pin 57, as will be described later, a replacement pin member 1 is used in place of the existing pin member, idler link pin 57, and it is shown as a replacement pin member 1 in other drawings.

[0034] [Configuration of Clamp 4] The configuration of the main parts of the clamp 4 of the first embodiment will be described using Figure 3. Figure 3A shows the clamp 4 in a tightened state, Figure 3B shows the released state, and Figure 3C shows the state in which the rope 6 is unlocked by the unlocking means.

[0035] As shown in Fig. 3A, clamp 4 comprises a fastening tool 41, an abutting tool 42, and a clamp shaft 43 that rotatably supports fastening tool 41 and abutting tool 42. A fastening surface 41a of fastening tool 41 and an abutting surface 42a of abutting tool 42 face each other, and the gap therebetween serves as an insertion passage 44 for rope 6. As shown in Fig. 1B, similar to Patent Document 3, clamp shaft 43 can be easily attached and detached by a retaining ring 431 (shown in Fig. 1B), thereby enabling rope 6 to be attached and detached to clamp 4. As shown in Fig. 3A, fastening tool 41 is provided with an attachment hole 41b for rotatably attaching clamp 4 to clamp attachment device 100.

[0036] In this embodiment, the term "clamp 4" refers to a member such as the clamp 4 shown in the figure, or to a device for fixing a wire rope as described in Non-Patent Document 1. This is also called a wire clamp.

[0037] [Tightening / releasing clamp 4] The contact surface 41a of the fastener 41 is an arcuate surface, and the center O1 of the arc is displaced to the right (as shown in FIG. 3A) from the center O2 of the clamp shaft 43. Therefore, as shown in FIG. 3A, the insertion passage 44 gradually narrows from left to right.

[0038] 3A, when the rope 6 moves leftward from the clamp 4, friction in the passage 44 causes the fastening tool 41 and the abutting tool 42 to rotate in a direction that narrows the passage 44, thereby tightening the rope 6. Therefore, when the arm 55 bends, the clamp 4 that has tightened the rope 6 can pull the logging target W held on the left side of the rope to the right.

[0039] Conversely, as shown in Figure 3B, when the rope 6 moves to the right from the clamp 4, friction in the passage 44 causes the fastener 41 and the abutment 42 to rotate in a direction that widens the passage 44, allowing movement of the rope 6. Therefore, when the arm 55 is extended, the clamp 4 can be reeled out to the left toward the logging target W with the rope 6 released.

[0040] Furthermore, the clamp 4 is rotatably attached via a clamp attachment 100 to the tip end of the arm 55, with the left side facing the bucket. As a result, when the arm 55 is extended toward the logging target W, the weight of the abutting device 42 narrows the insertion passage 44, making it easier to tighten the rope for the next bending operation of the arm 55. Conversely, when the arm 55 is bent, the weight of the abutting device 42 widens the insertion passage 44, making it easier to release the rope for the next extension operation of the arm 55.

[0041] [Unlock clamp 4] When towing the logging target W, a large force is applied to the rope 6. As a result, the rope 6 may get caught in the insertion passage 44 and become locked. Therefore, the clamp mounting device 100 of the first embodiment is provided with an unlocking means 28 that unlocks the clamp 4.

[0042] The unlocking means 28 is arranged to rotate together with the clamp attachment 100 as the arm 55 bends and extends. The unlocking means 28 is provided with a male-threaded pressing portion 28a so that when the arm 55 reaches a predetermined angle for pulling in the logging target W, it can press and rotate the abutment member 42 in the unlocking direction, as shown in Figure 3C. The position of the pressing portion 28a can be adjusted by screwing in the pressing portion 28a.

[0043] [Configuration of clamp fixture 100] Clamp mounting fixture 100 of this embodiment uses a pin member used in idler link 58, which is one of the link parts of arm 55, and uses a replaceable replacement pin member 1 as this pin member in place of the existing pin member, idler link pin 57. Clamp mounting fixture 100 is equipped with this replacement pin member 1 and a mounting member 2 that is attached to this replacement pin member 1, and this mounting member 2 is formed so that fastener 41 of clamp 4 can be rotatably attached to it.

[0044] More specifically, as shown in Figures 1, 2, 4 and 5, the clamp mounting device 100 comprises a replacement pin member 1 that can be replaced with the existing pin member of the pin portion on the arm 55 side of the idler link 58 of the logging vehicle 5, a mounting member 2 that is attached to the replacement pin member 1, and an unlocking means 28 that unlocks the clamp 4 provided on the mounting member 2.

[0045] As shown in FIG. 4C , the replacement pin member 1 comprises a pin 11 and an engaging portion 12 welded to the pin 11. The pin 11 is longer than the idler link pin 57, which is an existing pin member. The engaging portion 12 has a notch 121 that engages with one of the idler links 58 (the near side in FIG. 1 ), allowing the pin 11 to rotate in conjunction with the rotation of the idler link 58. The function of the pin 11 rotating in conjunction with the rotation of the idler link 58 is a function possessed by the idler link pin 57 of this embodiment, which is an existing pin member. By incorporating this function into the replacement pin member 1, the replacement pin member 1 can be replaced without impairing the same functionality as the existing pin member. Furthermore, since there are various types of logging vehicles 5, if such a function is not required for the idler link pin of an existing pin member different from this embodiment, the engaging portion 12 and the notch 121 can also be eliminated.

[0046] In this embodiment, the mounting member 2 comprises a first bearing portion 21, a second bearing portion 22, a gap member 23 consisting of a shim spacer, a bolt-shaped retaining portion 24, a first backing plate 25 (see the enlarged view in Figure 2A), a rotation preventing member 26, a clamp mounting portion 27, and a lock release means 28 provided on this clamp mounting portion 27.

[0047] The components of the mounting member 2 will be described in more detail. The first bearing portion 21 has a first bearing 211 for receiving the pin 11 in a side portion along the side of the arm 55, and the second bearing portion 22 has a second bearing 221 for receiving the pin 11 in a side portion along the side of the arm 55, and the first bearing portion 21 and the second bearing portion 22 form a U-shaped part that surrounds both side surfaces and the bottom surface of the arm 55. As shown in FIGS. 1C and 5B, the first bearing portion 21 and the second bearing portion 22 are connected by a first bolt B1. Furthermore, the U-shaped part formed by the first bearing portion 21 and the second bearing portion 22 in this embodiment can also be formed as a single U-shaped part.

[0048] The gap members 23 are used to adjust the axial gap of the pin 11, and the number of gap members required for adjustment is used appropriately. There are multiple types of gap members 23, and as shown in FIG. 5B , they are inserted between the first bearing portion 21 and the engaging portion 12, between the idler link 58 on the second bearing 221 side and the second bearing 221, and between the second bearing 221 and the first backing plate 25, to adjust the axial gap of the pin 11. The axial gap of the pin 11 varies depending on the logging vehicle made by each manufacturer and the dimensions of the arm 55 and idler link 58. Therefore, by preparing multiple gap members 23 and multiple types with different thicknesses, the number and thickness of the gap members 23 can be changed according to the gap dimensions to make appropriate adjustments. The retaining member 24 is for preventing the second bearing 221 from coming off the pin 11, and has two hexagonal nuts fastened to the end portion.

[0049] The first backing plate 25 is inserted between the gap member 23 and the retaining portion 24 to serve as a retainer for the gap member 23, and has bends at both ends that allow it to be inserted into the bolt-shaped retaining portion 24 (see the enlarged view of Figure 2A). The rotation preventing member 26 is for preventing the mounting member 2 from rotating around the axis of the pin 11, and will be described in detail later.

[0050] The clamp mounting portion 27 consists of a T-shaped part when viewed from the side as in Figure 1A, and has a top surface 271 fixed to the bottom surface of a U-shaped part formed by the first bearing portion 21 and the second bearing portion 22, and is provided with a clamp support portion 273 that rotatably mounts the clamp 4 on a vertical surface 272, and a hole portion 274 (see Figure 5B) in which the lock release means 28 is provided.

[0051] The unlocking means 28 unlocks the clamp 4, and in this embodiment is made up of a bolt-shaped part that is screwed into the hole 274 of the clamp attachment portion 27.

[0052] In this type of replacement pin member 1 and mounting member 2 (as shown in the cross-sectional view of the part inserted into pin 11 in FIG. 5B), one idler link 58, arm 55, the other idler link 58, three gap members 23, a second bearing 221 of second bearing portion 22, one gap member 23, and a first backing plate 25 are inserted, in that order from the right in FIG. 5B, between engaging portion 12 welded to pin 11 and retaining portion 24 inserted into pin 11 to prevent it from coming out. In this way, the pin 11 is attached to the logging vehicle 5 together with the second bearing portion 22 and other components to prevent it from coming out. The second bearing portion 22 is provided with an abutment portion 222 (see FIGS. 2C and 5B) that abuts against arm 55 and determines the position for insertion into pin 11.

[0053] Furthermore, a gap L (see FIG. 5B) is created between the bottom surface of the arm 55 and the bottom surface of the U-shaped part formed by the first bearing portion 21 and the second bearing portion 22. If this gap L exists, there is a risk that the movement of the arm 55 during timber collection will cause the mounting member 2 to rotate independently of the movement of the arm 55. Therefore, in this embodiment, a rotation-preventing member 26 is used to adjust the gap L with the arm 55 to a predetermined size, thereby preventing the movement of the mounting member 2.

[0054] Specifically, as shown in FIG. 2B , the rotation-preventing member 26 is composed of four second bolts B2 and a second backing plate 261 for preventing scratches. As shown in FIGS. 2B and 5B , the second backing plate 261 is used by abutting the bottom surface of the arm 55 with the second bolts B2. Using the second bolts B2 and the second backing plate 261 in this manner prevents movement of the mounting member 2 relative to the arm 55. Furthermore, in this and other embodiments, the mounting member 2 is provided with the unlocking means 28. Therefore, by preventing rotation of the mounting member 2 with the rotation-preventing member 26, movement of the unlocking means 28 associated with movement of the mounting member 2 is also prevented. This results in very stable operation of the unlocking means 28, which unlocks the lock in accordance with the bending and extension angle of the arm 55. In this embodiment, the second backing plate 261 is bent at both ends to form a U-shape, which allows it to easily engage with the bottom surface of the U-shaped part formed by the first bearing portion 21 and the second bearing portion 22 and makes it less likely to deform.

[0055] 2A and 2B, four third bolts B3 are used to screw a top surface 271 of clamp mounting portion 27 into the bottom surface of a U-shaped part formed by first bearing portion 21 and second bearing portion 22. Lock release means 28 is provided in hole 274 of clamp mounting portion 27. As shown in FIGS. 1 and 2, clamp 4 is rotatably supported on clamp support portion 273 of clamp mounting portion 27.

[0056] More specifically, in this embodiment, the clamp support portion 273 is configured with two protrusions protruding from the vertical surface 272 so as to sandwich the fastener 41 of the clamp 4. The fastener 41 of the clamp 4 sandwiched between these two protrusions is pivotally supported by a shaft in the mounting hole 41b of the fastener 41, allowing the fastener 41 to rotate. Note that the clamp support portion 273 may be configured with another structure, such as, for example, a single protrusion.

[0057] [Example of installation procedure for clamp fixture 100] An example of the procedure for attaching the clamp attachment device 100 will be described using S1 to S6 in FIG. 6, a replacement pin part 1 consisting of a pin 11 to which an engaging portion 12 is welded is inserted into the attachment position of the idler link 58 of the arm 55 (S1). At this time, the notch 121 of the engaging portion 12 engages with the idler link 58. Next, the three gap members 23 and the first bearing 211 of the first bearing portion 21 are inserted into the pin 11 on the engaging portion 12 side in sequence (S2, S3). Next, the three gap members 23 and the second bearing 221 of the second bearing portion 22 are inserted in sequence onto the pin 11 on the side opposite to the first bearing portion 21 (S4).

[0058] Next, one gap member 23 and a first backing plate 25 are inserted into the pin 11 on the second bearing 221 side, and with the second backing plate 261 inserted between the bottom of the arm 55 and the bottom surface of the U-shaped part formed by the first bearing portion 21 and the second bearing portion 22, a retaining portion 24 is attached to the pin 11, and the first bearing portion 21 and the second bearing portion 22 are connected by two first bolts B1 (see Figure 1C) (S5).

[0059] Next, the second backing plate 261 is moved toward the arm 55 with the four second bolts B2 (S6). Thereafter (after S6 in FIG. 6), the top surface 271 of the clamp attachment portion 27 is screwed to the bottom surface of the U-shaped part formed by the first bearing portion 21 and the second bearing portion 22 with the four third bolts B3, and the clamp 4 is rotatably supported on the clamp attachment portion 27.

[0060] As described above, the clamp attachment device 100 of this embodiment is composed of a replaceable pin member 1 that can be used in place of the existing pin member used in the idler link 58 of the arm 55, and an attachment member 2 that is attached to this replaceable pin member 1, and this attachment member 2 is formed so that the fastening tool 41 of the clamp 4 can be rotatably attached. Therefore, when attaching the clamp 4 to the logging vehicle 5, there is no need to perform processing such as drilling or welding on the arm 55. Furthermore, since it can be easily removed, the clamp 4 can be easily removed when the logging vehicle 5 is used for purposes other than logging work.

[0061] In this embodiment, the mounting member 2 for rotatably mounting the fastener 41 of the clamp 4 is configured such that the clamp mounting portion 27 is screwed onto the bottom surface of a U-shaped part formed by the first bearing portion 21 and the second bearing portion 22, that is, the clamp mounting portion 27 is configured as a separate body. However, the clamp mounting portion 27 does not necessarily have to be a separate body, and for example, it is also possible to adopt a configuration in which the first bearing portion 21 is L-shaped and has a vertical surface 272 on its bottom surface.

[0062] Furthermore, in this embodiment, the clamp attachment portion 27 is configured to be fixed by screwing it to the bottom surface of the U-shaped part formed by the first bearing portion 21 and the second bearing portion 22. However, it is not limited to the configuration of being fixed to the bottom surface, and for example, a configuration can be adopted in which the clamp attachment portion 27 is fixed to the side portion of the first bearing portion 21 where the first bearing 211 is provided.

[0063] [Second embodiment] The configuration of the main parts of the clamp fixture 100A of the second embodiment will be described using Figures 7 and 8. Figures 7A to 7C show the main parts of the clamp fixture 100A of the second embodiment, and Figures 8A and 8B show the clamp fixture 100A attached to a logging vehicle 5.

[0064] In clamp mounting fixture 100A of the second embodiment, parts having the same configuration as clamp mounting fixture 100 of the first embodiment are given the same reference numerals and detailed descriptions thereof are omitted, while parts having the same names but different configurations are given the suffix "A" after the reference numeral. Generally, clamp mounting fixture 100 of the first embodiment was configured such that clamp mounting portion 27 was provided on mounting member 2 to which fastening tool 41 of clamp 4 was rotatably mounted, but clamp mounting fixture 100A of the present embodiment is configured such that mounting member 2A rotatably mounts fastening tool 41 of clamp 4 using replacement pin member 1A. Specifically, as shown in FIGS. 7 and 8, the clamp attachment device 100A is made up of an exchange pin member 1A and an attachment member 2A.

[0065] 8B, replacement pin member 1A comprises pin 11A and connecting portion 13 fixed to the end of pin 11A. Connecting portion 13 is used to screw clamp retaining member 30 (described later) onto pin 11A, and is fixed to pin 11A.

[0066] The mounting member 2A is composed of a first bearing portion 21A, which is an L-shaped member and has a first bearing 211A through which a pin 11A is inserted on a vertical surface, a bolt-shaped retaining portion 24A, a rotation preventing member 26A, a clamp retaining member 30, a lock release means 28A, and a spacer 29.

[0067] The components of the mounting member 2A will be described in more detail below. The first bearing portion 21A has a first bearing 211A with a pin 11A inserted into its L-shaped vertical surface, and also has an unlocking mounting plate 21Aa on the end of the vertical surface where the unlocking means 28A is provided.

[0068] The retaining member 24A is for restricting the movement of the pin 11A in the pin axis direction, and is inserted into a through-hole that is orthogonal to the pin axis direction and in which the pin 11A is provided. Note that the retaining member 24A may be the same as the retaining member 24 of the first embodiment. In this embodiment, the rotation preventing member 26A is made up of only the second bolt B2, but a second backing plate 261 may also be used in addition, as in the first embodiment.

[0069] As shown in Figure 8B, the clamp anti-slip member 30 is a cap-shaped member that fits onto the end of the pin 11A, and is screwed onto the connection portion 13 of the pin 11A with a fourth bolt B4 to prevent the first bearing portion 211A, the fastener 41A of the clamp 4A, etc. from slipping out of the pin 11A.

[0070] 7, the unlocking means 28 is provided on the unlocking attachment plate 21Aa of the first bearing portion 21A. As in the first embodiment, the unlocking means 28A is made up of a bolt-shaped part that is screwed into a hole (not shown) in the unlocking attachment plate 21Aa. The spacer 29 is inserted between the first bearing portion 211A and the clamp 4A so as to prevent direct contact between them.

[0071] In the clamp attachment device 100A of the second embodiment configured as described above, the attachment hole in the fastener 41A of the clamp 4A is directly fitted onto the pin 11A that forms the replacement pin component 1A, and the clamp removal prevention member 30 that forms the attachment member 2A is attached, thereby rotatably attaching the fastener 41A of the clamp 4A. In other words, the clamp attachment device 100A of this embodiment is configured so that the attachment member 2A rotatably attaches the fastener 41 of the clamp 4 using the replacement pin component 1A.

[0072] Therefore, the clamp fixture 100A of the second embodiment has the same effects as the clamp fixture 100 of the first embodiment, and is small and inexpensive because the clamp 4A can be attached directly to the pin 11A with such a simple configuration.

[0073] As described above, the clamp attachment devices of the first and second embodiments are used in logging operations to pull in a logging target using the force of a bending and extending arm, eliminating the need for processing such as drilling holes or welding on the arm. Furthermore, clamps used in logging operations can be easily removed. This makes them extremely suitable for logging methods such as those described in Patent Document 2.

[0074] In addition, the clamp mounting fixtures of the first and second embodiments are provided with a separate gap member to adjust the axial gap of the pin, and a separate rotation prevention member to reduce the gap between the clamp mounting fixture and the arm and prevent the clamp mounting fixture from rotating, thereby expanding the range of application to logging work vehicles whose dimensions vary depending on the manufacturer and model.

[0075] Furthermore, although the above-described embodiment uses the idler link 58 as the link portion, it is also possible to use a bucket link that is located at the tip of the arm rather than the idler link 58. However, since the bucket 51 is located at the end of the bucket link, there is a possibility that the bucket 51 may get in the way, so it is preferable to use an idler link 58 that is further away from the bucket 51. Note that the above-described embodiment is a logging vehicle equipped with a bucket as an attachment at the tip of the arm 55, but this is not limiting, and for example, the attachment may be a grapple.

[0076] In addition, in the embodiments, replaceable pin members are used in place of existing pin members as pin members used in the link portions, but existing pin members (idler link pins and bucket link pins) may also be used as they are. However, since existing pin members may be too short to attach mounting members, it is better to use replaceable pin members that can be secured to have sufficient length in place of existing pin members and that can use processed pins.

[0077] [Third embodiment] The configuration of the main parts of the pulley attachment device 100B of the third embodiment will be explained using Figure 9. In this embodiment, a pulley 7 is used as a specific example of a holder that holds a string-like member. Figure 9 is a diagram showing the main parts of the pulley attachment device 100B of this embodiment. In the pulley attachment device 100B of this embodiment, parts that have the same configuration as the clamp attachment device 100 of the first embodiment are given the same reference numerals and detailed explanations will be omitted, and parts with the same names but different configurations will have the suffix "B" added to the reference numerals. FIG. 9(A) is a side view showing a state in which a pulley 7 is attached to a pulley attachment device 100B of this embodiment, and FIG. 9(B) is a front view of FIG. 9(A).

[0078] The pulley attachment tool 100B of this embodiment is the same as the clamp attachment tool 100 of the first embodiment, except that a pulley 7 is attached to a pulley support part 273B corresponding to the clamp support part 273 of the first embodiment, instead of the clamp 4. More specifically, the pulley attachment hole 71 is disposed between two protrusions protruding from the vertical surface 272B, and the pulley 7 is attached by pivotally supporting it.

[0079] In this embodiment, the method of collecting timber is not to pull the target object by bending the arm 55 as in the first embodiment, but to directly pull the target object with the force of a winch (not shown). If a pulley 7 is attached, when pulling the target object W, the rotating body (not shown) is rotated to rotate the pulley 7 left and right, thereby moving the target object W left and right. For example, the target object W is moved left and right when collecting and placing it in a predetermined position or when avoiding stumps or tree debris.

[0080] In this way, the present invention can also be applied to the attachment of pulley 7 as a holder. Pulley 7 can also be directly connected to pin 11A as in the second embodiment. Also, the pulley 7 shown in Fig. 9 has a configuration in which the mounting hole 71 portion and the main body portion of the pulley 7 are integrated, that is, the mounting hole 71 and the support member of the pulley are integrated, but a pulley may have a configuration in which the mounting hole 71 portion and the support member are configured as separate bodies that are fixed so as to be rotatable.

[0081] [Fourth embodiment] The configuration of the main parts of the hook attachment device 100C of the fourth embodiment will be explained using Figure 10. In this embodiment, a hook 8 is used as a specific example of a holder that holds a string-like member. Figure 10 is a diagram showing the main parts of the hook attachment device 100C of this embodiment. In the hook attachment device 100C of this embodiment, parts that have the same configuration as the clamp attachment device 100 of the first embodiment are given the same reference numerals and detailed explanations will be omitted, and parts with the same names but different configurations will have the suffix "C" added to the reference numerals.

[0082] Fig. 10(A) is a side view showing the state in which a hook 8 is attached to a hook attachment device 100C of this embodiment, and Fig. 10(B) is a front view of Fig. 10(A). The hook 8 has an attachment hole 81.

[0083] The hook mounting fixture 100C of this embodiment is the same as the clamp mounting fixture 100 of the first embodiment, except that a hook 8 is attached to a hook support portion 273C corresponding to the clamp support portion 273 of the first embodiment, instead of the clamp 4. More specifically, the hook mounting hole 81 is disposed between two protrusions projecting from the vertical surface 272B, and the hook 8 is attached by pivotally supporting it.

[0084] The hook 8 is attached to the logging vehicle 5 and is used for moving work such as lifting an object or moving its location. The present invention can also be applied to the attachment of such a hook 8. Note that the hook 8 can also be directly connected to the pin 11A as in the second embodiment.

[0085] In this way, in the above embodiment, the attachment used on the logging vehicle 5 having the bending and extending arm 55 is described as an attachment used for moving work to move the object W by using the clamp 4, pulley 7, and hook 8 as holding devices and attaching these holding devices to the attachment member, but it is not limited to being used for moving work.

[0086] The mounting fixture for use with a logging vehicle with a bending and extending arm of the present invention allows, for example, a light source to be attached to the mounting member instead of the clamp 4, pulley 7, or hook 8, allowing the logging vehicle 5 to be used as a simple outdoor lighting device, or, for example, a camera to be attached to the mounting member, allowing the logging vehicle 5 to be used as a simple photography device. In other words, the logging vehicle can be used in this way in emergencies such as disasters. Furthermore, attaching a light source, camera, etc. to the end of the arm is very convenient because the height and position of the light source, etc. can be easily adjusted by bending and extending or moving the arm. [Explanation of symbols]

[0087] 100, 100A: Clamp mounting fixture 100B: Pulley mounting fixture 100C: Hook mounting fixture 1, 1A: Replacement pin parts 11, 11A: pin 2, 2A, 2B: Mounting parts 21, 21A: 1st bearing part 22, 22A: 2nd bearing part 23: Gap material 26, 26A: Rotation prevention member 27: Clamp mounting part 27B: Pulley mounting part 27C: Hook mounting part 28, 28A: Unlocking means 30: Clamp retaining member 4, 4A: Clamp 41, 41A: Fastener 42: Contact tool 43: Clamp shaft 44: Passage 5: Work vehicle for collecting timber 55: Arm 58: Idler Link 7: Pulley 8: Hook

Claims

1. A mounting tool for use on a logging vehicle having a bending and extending arm, a pin member used in either an idler link or a bucket link, which is a link portion on the arm; an attachment member that is attached only to the pin member; It consists of the mounting member is provided with a rotation preventing member for preventing the pin member from rotating about its axis, 10. A mounting fixture for use on a logging vehicle having a bendable arm, wherein the rotation preventing member adjusts the gap between the arm and the mounting member.

2. 2. A mounting fixture for use with a logging vehicle having a bendable arm as described in claim 1, characterized in that the pin member is a replacement pin member that is different from the existing one used in the logging vehicle.

3. The attachment for use with a logging vehicle having a bending and extending arm according to claim 1 comprises: A string-like member attached to the object; a holder for holding the string-like member; and is used for a moving operation to move the object, The mounting member is a mounting fixture used for a logging vehicle having a bending and extending arm, characterized in that the holding device is attached to the mounting member.

4. The moving operation of moving the object is a logging operation of collecting lumber from a logging object, the holding tool is a clamp consisting of a fastening tool and an abutting tool, and the fastening tool and the abutting tool form an insertion passage for the string-like member, 4. The attachment tool for use on a logging vehicle having a bending and extending arm according to claim 3, wherein the attachment member rotatably attaches the fastening tool of the clamp.

5. 5. A mounting fixture for use on a logging vehicle having a bending and extending arm according to claim 4, characterized in that said mounting member is provided with an unlocking means for pressing said fastener to widen said insertion passage.

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