Lifting aids

Abstract

To provide a lifting aid that can be easily fixed with high strength [Solution] A lifting aid 1 is fixed to the upper end of a side wall 2 of a bucket of an aerial work vehicle, the lifting aid 1 comprising a holding member 3, a handrail member 4 fixed to the holding member 3, and a clamp member 5, the holding member 3 having a horizontal portion 3a extending horizontally across the side wall, an outer vertical portion 3b facing the surface of the side wall 2 on the outside of the bucket, and an inner vertical portion 3c facing the surface of the side wall 2 on the inside of the bucket, the clamp member 5 being held by the holding member 3 between the inner vertical portion 3c and the outer vertical portion 3b so that the horizontal distance between the inner vertical portion 3c and the outer vertical portion 3b and the vertical distance between the horizontal portion 3a and the clamp member 5 can be adjusted, the edge 2a protruding horizontally outward from the upper end of the side wall 2 is clamped in the vertical direction by the horizontal portion 3a and the clamp member 5, and the side wall 2 is fixed to the side wall 2 by being clamped horizontally by the inner vertical portion 3c and the clamp member 5, the lifting aid 1.

Description

[Technical Field]

[0001] The present invention relates to a lifting aid. [Background technology]

[0002] BACKGROUND ART A climbing aid that is fixed to a work vehicle and has a handrail member is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-7364 Summary of the Invention [Problem to be solved by the invention]

[0004] It is preferable that the climbing aid can be easily fixed to the work vehicle and has high fixing strength.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a lifting aid that can be fixed easily and with high strength. [Means for solving the problem]

[0006] One aspect of the present invention is as follows.

[0007] [1] A lifting aid that is fixed to the upper end of the side wall of a bucket of a high-altitude work vehicle, The lifting aid includes a holding member, a handrail member fixed to the holding member, and a clamp member, the retaining member has a horizontal portion extending horizontally across the side wall, an outer vertical portion facing the surface of the side wall on the outer side of the bucket, and an inner vertical portion facing the surface of the side wall on the inner side of the bucket, the clamp member is held by the holding member between the inner vertical portion and the outer vertical portion so that a horizontal distance from the inner vertical portion and a vertical distance from the horizontal portion can be adjusted, An elevator aid in which the edge protruding horizontally outward from the upper end of the side wall is clamped vertically by the horizontal portion and the clamp member, and the side wall is fixed to the side wall by being clamped horizontally by the inner vertical portion and the clamp member.

[0008] [2] the clamp member is held by the outer vertical portion so as to be movable horizontally relative to the holding member, The clamp member is provided with a movable member that can move vertically, and by moving the movable member vertically, the vertical distance from the horizontal portion can be adjusted. [1] A lifting aid described in

[0009] [3] The handrail member has one end and the other end fixed to the holding member, and includes a first linear portion and a second linear portion extending vertically, and a grip portion between the first linear portion and the second linear portion, The lifting aid described in [1] or [2], wherein at the one end and the other end, the handrail member extends horizontally and is fixed vertically to the outer vertical portion.

[0010] [4] The handrail member is an ascent / descent aid described in [1] to [3], wherein the first straight portion, the second straight portion, and the grip portion are U-shaped, and the plane constituting the U-shape faces the side wall.

[0011] [5] the outer vertical portion has one end insertion hole extending horizontally and the other end insertion hole extending horizontally; The one end is inserted into the one end insertion hole and fixed to the outer vertical portion, The lifting aid according to any one of [1] to [4], wherein the other end is inserted into the other end insertion hole and fixed to the outer vertical portion.

[0012] [6] The lifting aid according to any one of [1] to [5], wherein the position to which the one end is fixed and the position to which the other end is fixed on the outer vertical portion are different in the up-down direction and the left-right direction. [Effects of the Invention]

[0013] The lifting aid of the present invention can be easily and strongly fixed to the bucket of a work vehicle. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an overall view showing a state before a lifting aid according to an embodiment of the present invention is fixed to a side wall. [Figure 2] 1 is a diagram showing a state in which a lifting assisting device according to an embodiment of the present invention is fixed to a side wall of a bucket of a vehicle for working at height. [Figure 3] FIG. 2 is a front view of the lifting aid shown in FIG. [Figure 4] FIG. 2 is an enlarged side view of the lifting aid shown in FIG. [Figure 5] FIG. 10 is an enlarged side view showing the state after the lifting aid is fixed to the side wall. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0016] As shown in FIGS. 1 and 2, in one embodiment of the present invention, climbing aid 1 is fixed to the upper end of side wall 2 of the bucket of a vehicle for working at height. Climbing aid 1 includes a holding member 3, a handrail member 4 fixed to holding member 3, and a clamp member 5. Climbing aid 1 is fixed to side wall 2 by attaching clamp member 5 to holding member 3 with holding member 3 hooked onto side wall 2 of the bucket from above, and clamping side wall 2 and an edge 2a of side wall 2 between holding member 3 and clamp member 5. A worker working on a vehicle for working at height can increase safety when climbing up and down to the bucket by grasping handrail member 4 of climbing aid 1 fixed to side wall 2.

[0017] 3 to 5, a detailed description will be given of an embodiment of the climbing aid 1. The climbing aid 1 includes a holding member 3, a handrail member 4 fixed to the holding member 3, and a clamp member 5. The holding member 3 has a horizontal portion 3a extending horizontally across the side wall 2, an outer vertical portion 3b extending downward from the outer end of the horizontal portion 3a and facing the surface of the side wall 2 outside the bucket, and an inner vertical portion 3c extending downward from the inner end of the horizontal portion 3a and facing the surface of the side wall 2 inside the bucket. Note that in this application, the vertical direction is referred to as the vertical direction, the thickness direction of the side wall 2 is referred to as the horizontal direction, the direction along the side wall 2 and perpendicular to the horizontal direction is referred to as the up-down direction, and the direction along the side wall 2 and perpendicular to the up-down direction is referred to as the left-right direction. In this embodiment, the vertical direction and the up-down direction are the same.

[0018] The clamp member 5 is held by the holding member 3 between the inner vertical portion 3c and the outer vertical portion 3b so that the horizontal distance from the inner vertical portion 3c and the vertical distance from the horizontal portion 3a can be adjusted.

[0019] The clamp member 5 is held by the outer vertical portion 3b so as to be movable horizontally relative to the holding member 3. The clamp member 5 has a receiving member 6 that is movable horizontally relative to the holding member 3. The receiving member 6 has an outer facing wall 6a facing the outer vertical portion 3b, an inner facing wall 6b facing the inner vertical portion 3c, and a lower wall 6c connecting the lower ends of the outer facing wall 6a and the inner facing wall 6b. The lifting aid 1 has a horizontal penetrating member 7 that penetrates horizontally through the outer vertical portion 3b and the outer facing wall 6a and whose tip abuts against the inner facing wall 6b. The holding member 3 has a horizontal threaded portion 3d that threadably engages with the horizontal penetrating member 7, and the outer facing wall 6a has a horizontal hole 6a1 through which the horizontal penetrating member 7 passes. In this embodiment, the horizontal penetrating member 7 is composed of a bolt 7a and a nut 7b, and the horizontal threaded portion 3d is composed of a nut fixed to the outer vertical portion 3b.

[0020] By rotating the bolt 7a of the horizontal penetrating member 7 threaded into the horizontal threaded portion 3d in the tightening direction, the horizontal penetrating member 7 moves horizontally inward relative to the outer vertical portion 3b, thereby moving the receiving member 6 horizontally inward and adjusting the horizontal distance between the clamp member 5 and the inner vertical portion 3c. In this embodiment, a total of four horizontal threaded portions 3d are provided, two in each of the vertical and horizontal directions. Two horizontal threaded portions 3d are selected and used to match the shape of the edge 2a of the sidewall 2 to which the lifting support device 1 is fixed. However, this is not a limitation, and the number and arrangement of the horizontal threaded portions 3d can be appropriately determined. In this embodiment, the horizontal penetrating member 7 is formed by a bolt 7a and a nut 7b, but this is not a limitation. In this embodiment, the horizontal threaded portion 3d is formed by a nut fixed to the outer vertical portion 3b by welding. However, the method of fixing the nut is not limited thereto and may be, for example, adhesive. The method of forming the horizontal screw portion 3d is not limited to forming it using a fixed nut, but it may also be formed, for example, by a female thread portion provided on the inner surface of a hole that penetrates the outer vertical portion 3b horizontally.

[0021] The clamp member 5 includes a movable member 8 that is inserted between the outer facing wall 6a and the inner facing wall 6b and is movable in the vertical direction, and a vertical penetrating member 9 that penetrates the lower wall 6c vertically and has a tip that abuts against the movable member 8 from below. The lower wall 6c has a vertical threaded portion 6c1 that threadably engages with the vertical penetrating member 9. In this embodiment, the vertical penetrating member 9 is formed by a bolt 9a and a nut 9b, and the vertical threaded portion 6c1 is formed by a nut fixed to the lower wall 6c.

[0022] By rotating the bolt 9a of the vertical penetrating member 9 threaded into the vertical threaded portion 6c1, the vertical penetrating member 9 moves vertically relative to the receiving member 6, thereby moving the movable member 8 vertically and adjusting the vertical distance between the clamp member 5 and the horizontal portion 3a. In this embodiment, two vertical threaded portions 6c1 are provided side by side in the left-right direction, but this is not limited to this. The number and arrangement of the vertical threaded portions 6c1 can be set as appropriate. In this embodiment, the vertical penetrating member 9 is formed by a bolt 9a and a nut 9b, but this is not limited to this. Also, in this embodiment, the vertical threaded portion 6c1 is formed by a nut fixed to the underside of the lower wall 6c by welding, but the method of fixing the nut is not limited to this and may be, for example, adhesive. The method of forming the vertical threaded portion 6c1 is not limited to forming it by a fixed nut. For example, it may be formed by a female thread provided on the inner surface of a hole vertically penetrating the lower wall 6c.

[0023] The lifting aid 1 is secured to the upper end of the side wall 2 by holding the clamp member 5 between the side wall 2 and the outer vertical portion 3b with the holding member 3 in a state where the upper end of the side wall 2 is in contact with the horizontal portion 3a of the holding member 3 (the state shown in FIG. 4). From the state shown in FIG. 4, the lifting aid 1 is fixed to the side wall 2 by tightening the horizontal penetrating member 7 and the vertical penetrating member 9, so that the edge 2a protruding horizontally outward from the upper end of the side wall 2 is clamped in the vertical direction by the horizontal portion 3a and the movable member 8 of the clamp member 5, and the side wall 2 is clamped horizontally by the inner vertical portion 3c and the inner opposing wall 6b of the clamp member 5 (the state shown in FIG. 5).

[0024] According to the above configuration, by clamping the edge 2a from above and below, the lifting aid 1 can be prevented from rotating and falling off the side wall 2 even when subjected to a force from the left or right, thereby achieving high fixing strength. Also, the lifting aid 1 can be fixed by tightening the horizontal penetrating member 7 and the vertical penetrating member 9, thereby achieving easy installation. Furthermore, because the clamp member 5 is held at an adjustable horizontal distance and vertical distance from the side wall 2, the lifting aid 1 can be fixed in accordance with the thickness of the side wall 2 and the shape of the edge 2a.

[0025] The handrail member 4 has one end 4a and the other end 4b fixed to the holding member 3, a first straight portion 4c connected to the one end 4a and a second straight portion 4d connected to the other end 4b, and a grip portion 4e between the first straight portion 4c and the second straight portion 4d. The handrail member 4 extends horizontally at the one end 4a and the other end 4b and is fixed perpendicularly to the outer vertical portion 3b. The handrail member 4 is made, for example, by bending a pipe material. In this embodiment, the handrail member 4 is fixed to the holding member 3 by welding, but this is not limiting and the handrail member 4 may also be fixed by, for example, bolts and nuts. According to the above configuration, the handrail member 4 has the first straight portion 4c and the second straight portion 4d, which makes it easier for the worker to grasp the handrail member 4 with both hands, thereby improving the safety of the worker when ascending or descending.

[0026] The handrail member 4 has a U-shape with the first straight portion 4c, the second straight portion 4d, and the grip portion 4e, and the flat surface of the U-shape faces the side wall 2. According to the above configuration, the U-shape of the grip portion 4e makes it easier for the worker to quickly grasp the grip portion 4e in the event of an unexpected incident when ascending or descending to the bucket, such as when the worker's hand slips, thereby further improving safety during ascending or descending. In addition, because the first straight portion 4c, the second straight portion 4d, and the grip portion 4e of the handrail member 4 are provided along the side wall 2, the amount by which the ascending or descending aid 1 protrudes from the side wall 2 of the bucket when attached to the bucket is reduced, allowing the ascending or descending aid 1 to be installed in a space-saving manner.

[0027] The outer vertical portion 3b has a one-end insertion hole 3b1 extending horizontally and an other-end insertion hole 3b2 extending horizontally, with one end 4a inserted into the one-end insertion hole 3b1 and fixed to the outer vertical portion 3b, and the other end 4b inserted into the other-end insertion hole 3b2 and fixed to the outer vertical portion 3b. With the above configuration, the handrail member 4 can be supported by the inner peripheral surfaces of the one-end insertion hole 3b1 and the other-end insertion hole 3b2, thereby improving the load-bearing capacity of the handrail member 4 against loads from the up-down and left-right directions. Furthermore, since the one-end insertion hole 3b1 and the other-end insertion hole 3b2 are provided on the same surface and facing the same direction, it becomes easy to insert the one end 4a into the one-end insertion hole 3b1 and the other end 4b into the other-end insertion hole 3b2, respectively, thereby achieving excellent ease of assembly.

[0028] As shown in Fig. 3, the position to which one end 4a and the other end 4b are fixed on the outer vertical portion 3b are different in the up-down direction and the left-right direction. With the above configuration, when the handrail member 4 is subjected to a load in the up-down direction or the left-right direction, the load received by the one end 4a and the other end 4b can be reduced, thereby further improving the load-bearing capacity of the handrail member 4. In this embodiment, the one end 4a is fixed to the upper left corner of the outer vertical portion 3b when viewed from the front, and the other end 4b is fixed to the lower right corner of the outer vertical portion 3b when viewed from the front. However, the positions of the one end 4a and the other end 4b are not limited thereto. For example, the one end 4a may be fixed to the lower left corner of the outer vertical portion 3b when viewed from the front, and the other end 4b may be fixed to the upper right corner of the outer vertical portion 3b when viewed from the front.

[0029] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be modified in various ways without departing from the gist of the present invention. [Explanation of symbols]

[0030] 1. Lifting aids 2 side wall 2a Edge 3 Retaining member 3a Horizontal part 3b Outer vertical part 3b1 One end insertion hole 3b2 Other end insertion hole 3c Inner vertical section 3d horizontal screw joint 4 Handrail components 4a one end 4b other end 4c 1st straight section 4d 2nd straight section 4e Grip 5 Clamping member 6 Receiving member 6a Outside facing wall 6a1 horizontal hole 6b Inner facing wall 6c lower wall 6c1 Vertical threaded part 7 Horizontal penetration members 7a Bolt 7b Nut 8 Movable parts 9 Vertical penetration members 9a Bolt 9b Nut

Claims

1. A lifting aid that is fixed to the upper end of the side wall of a bucket of a high-altitude work vehicle, The lifting aid includes a holding member, a handrail member fixed to the holding member, and a clamp member, the retaining member has a horizontal portion extending horizontally across the side wall, an outer vertical portion facing the surface of the side wall on the outer side of the bucket, and an inner vertical portion facing the surface of the side wall on the inner side of the bucket, the clamp member is held by the holding member between the inner vertical portion and the outer vertical portion so that a horizontal distance from the inner vertical portion and a vertical distance from the horizontal portion can be adjusted, an edge protruding horizontally outward from an upper end of the side wall is clamped in the vertical direction by the horizontal portion and the clamp member, and the side wall is fixed to the side wall by being clamped in the horizontal direction by the inner vertical portion and the clamp member; The handrail member has one end and the other end fixed to the holding member, and includes a first linear portion and a second linear portion extending in a vertical direction, and a grip portion between the first linear portion and the second linear portion, At the one end and the other end, the handrail member extends horizontally and is fixed vertically to the outer vertical portion.

2. the clamp member is held by the outer vertical portion so as to be movable horizontally relative to the holding member, 2. The lifting aid according to claim 1, wherein the clamping member comprises a movable member that is movable in the vertical direction, and the vertical distance between the clamping member and the horizontal portion can be adjusted by moving the movable member in the vertical direction.

3. The handrail member according to claim 1, wherein the first straight portion, the second straight portion, and the grip portion are U-shaped, and a plane constituting the U-shape faces the side wall.

4. the outer vertical portion has one end insertion hole extending horizontally and the other end insertion hole extending horizontally; The one end is inserted into the one end insertion hole and fixed to the outer vertical portion, The lifting aid according to claim 1 , wherein the other end is inserted into the other end insertion hole and fixed to the outer vertical portion.

5. The lifting aid according to claim 1 , wherein the position to which the one end is fixed and the position to which the other end is fixed on the outer vertical portion are different in the up-down direction and the left-right direction.

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