JP2001348196A - Workbench supporting device for maintenance vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workbench supporting device in which many common parts can be effectively used, with little parts to be changed even when model and the like for a vehicle for high lift work are changed. SOLUTION: The workbench supporting device 30 comprises a leveling mechanism 31, an oscillating mechanism 33 and a workbench support 35. The leveling mechanism 31 includes a leveling cylinder 37 pivotally combined vertically movable inside the end of a telescoping boom 13 and a leveling bracket 39 pivotally combined vertically movable at the end of the telescoping boom 13. The end of the leveling cylinder 37 and the oscillating mechanism 33 are detachably mounted to the leveling bracket 39. When the specification and the like of the vehicle are changed, only the leveling bracket is newly fabricated, and the leveling cylinder 37, the oscillating mechanism 33, the workbench support 35 and the workbench 19 are used as common parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workbench support device for a working vehicle, and more particularly, to a workboom support device which is provided on a vehicle body so as to be able to swing up and down at the tip thereof. The present invention relates to a workbench support device for a workbench provided to be swingable in a horizontal direction.

[0002]

2. Description of the Related Art When performing high-altitude work, a high-altitude work vehicle having a workbench at the end of a telescopic boom provided at least on a vehicle body so as to be able to move up and down is generally used. The telescopic boom of this aerial work vehicle has a vertical post pivotally connected to the tip of the telescopic boom, and a vertical post pivotally connected to the lower end of the vertical post inside the telescopic boom tip. One end of the leveling cylinder is pivotally connected. At the upper end of the vertical post, a swing mechanism that can rotate with respect to the vertical post is provided. The swing mechanism is provided with a horizontal arm projecting in the horizontal direction, and a working table is attached to a tip of the horizontal arm.

[0003] The telescopic boom is configured to be moved up and down by a telescopic movement of an up-and-down cylinder pivotally connected between the vehicle body and the telescopic boom, and the leveling cylinder operates in conjunction with the telescopic movement of the up-and-down cylinder. The workbench is always held in a horizontal state, with the vertical post always being held in a vertical state regardless of the angle of the telescopic boom.

[0004]

However, the worktable, the horizontal arm, the oscillating mechanism, the vertical post and the leveling cylinder (hereinafter collectively referred to as "workbench, etc.") are integrated with the vertical post as the center. The aerial work vehicle has various specifications. For this reason, for example, when the leveling specification of the aerial work vehicle is changed, a work table or the like may not be able to be directly attached to the end of the telescopic boom whose model has been changed. In this case, a work table or the like corresponding to the model whose specification has been changed will be manufactured. However, it will be necessary to manufacture new parts corresponding to the type of the aerial work vehicle, and the number of types will increase, thereby increasing the manufacturing cost. Problem arises.

The present invention has been made in view of such a problem, and even when specifications such as leveling of an aerial work vehicle are changed, an inexpensive manufacturing method is used by using the swing mechanism as a common part. It is an object of the present invention to provide a workbench support device for a work vehicle that can realize cost.

[0006]

According to the present invention, there is provided a workbench support device for a working vehicle according to the present invention, which comprises a boom (for example, a telescopic boom 13 in the embodiment) provided on a vehicle body so as to be able to move up and down at least. And a work table provided at the tip of the boom so as to be able to swing vertically and horizontally (for example, the aerial work vehicle 1 in the embodiment).
A vertical member (for example, the leveling bracket 39 in the embodiment) removably attached to the tip of the boom and swingably in a vertical plane with respect to the boom; A leveling cylinder that pivotally attaches the other end to the vertical member so that the other end is detachably attached to the vertical member, and always holds the vertical member in a vertical state regardless of the operation of raising and lowering the boom; and a work detachably mounted above the vertical member. A table horizontal swing mechanism (for example, the swing mechanism 33 in the embodiment), a work table support attached to the work table horizontal swing mechanism, and a work table support attached to the side surface, A work table that is swung in the horizontal direction together with the work table support by the movement mechanism;

According to the workbench support device for a work vehicle having the above structure, when the leveling specification of the vehicle is changed,
The vertical member is manufactured to the changed specifications, and the workbench, the workbench support, and the workbench horizontal swing mechanism are used as common parts, and the workbench mechanism is attached to the newly manufactured vertical member. Attach.

As described above, the work table, the work table support, and the work table horizontal swing mechanism are used as common parts of the work vehicle, and the vertical members are used as changeable parts of the work vehicle. Even if the specification is changed, only the vertical member needs to be newly manufactured. Therefore, it is possible to prevent an increase in the number of types of parts due to the change in the specification and suppress an increase in manufacturing cost.

In the workbench support device having the above structure, a leveling bracket is provided at the end of the boom so as to be swingable in a vertical direction. The leveling bracket is pivotally connected to the end of a leveling cylinder. The parallelogram link mechanism comprising an upper link member and a lower link member is pivotally connected to the vertical member at a tip end of the parallelogram link mechanism. The workbench horizontal swinging mechanism may be detachably attached to the vertical member so as to be movably connected to the tip of the vertical member.

According to the workbench support device having the above-described structure, in a work vehicle having a parallelogram link mechanism at a tip of a boom and a worktable at a tip of the parallelogram link mechanism,
When the specifications of the parallelogram link mechanism are changed, the vertical members are manufactured according to the changed specifications, and the workbench, the workbench support, and the workbench horizontal swing mechanism are used as common parts of the vehicle. Using this, the workbench, the workbench support, and the workbench horizontal swing mechanism are attached to the newly manufactured vertical member.

As described above, in the work vehicle having the parallelogram link mechanism at the end of the boom, the work table, the work table support portion, and the work table horizontal swing mechanism are used as common parts of the work vehicle. By using the vertical member provided at the tip of the parallelogram link mechanism as a changeable part of the working vehicle, even if the specifications of the parallelogram link mechanism are changed, only the vertical member needs to be newly manufactured. In addition, it is possible to prevent an increase in the number of types of components due to a change in specifications, thereby suppressing an increase in manufacturing costs.

Further, in the workbench support device having the above-mentioned structure, an intermediate bracket for attaching a vertical member between the vertical member and the distal end of the parallelogram link mechanism and removably pivotally connecting the distal end of the parallelogram link mechanism is provided. You may pinch.

In a parallelogram link mechanism in which the gap between the upper link member and the lower link member is large, the vertical member used so far may not be able to be directly connected to the tip of the parallelogram link mechanism. In this case, an intermediate bracket is inserted between the tip of the parallelogram link mechanism and the vertical member. In this way, by interposing the intermediate bracket between the tip of the parallelogram link mechanism and the vertical member, the parallelogram link mechanism in which the gap between the upper link member and the lower link member becomes large is vertically moved through the intermediate bracket. The member can be pivoted. Also, the specifications of the parallelogram link mechanism have been changed by using the workbench, the workbench support, the workbench horizontal swing mechanism, and the vertical member as common parts of the vehicle, and making the intermediate bracket a changeable part. However, since only the intermediate bracket needs to be newly manufactured, it is possible to prevent an increase in the number of types of parts due to a change in specifications and to suppress an increase in manufacturing costs.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. This embodiment shows an aspect of an aerial work vehicle provided with a worktable capable of swinging at the tip end of a telescopic boom provided on a vehicle body so as to be capable of turning and raising and lowering.

[0015]

First Embodiment A first embodiment of a workbench support device according to the present invention will be described with reference to FIGS.
Before describing the workbench support device first, an aerial work vehicle equipped with the workbench support device will be described. Aerial work vehicle 1
As shown in FIG. 1, the vehicle is configured with a truck as a base, has a driving cabin 5 in front of the vehicle body 3, and protrudes outward on both front and rear sides of the vehicle body 3 behind the driving cabin 5. An outrigger jack 7 for lifting and supporting 3 is provided. At the rear of the vehicle body 3, there is provided a turntable 9 which projects upward and can turn. A turning motor 11 is provided in the vehicle body 3 below the turning table 9, and the turning table 9 is turned by the operation of the turning motor 11.

A base of a telescopic boom 13 in which three boom members are nested is pivotally connected to the upper part of the swivel 9. A telescopic cylinder 15 is built in the telescopic boom 13, and the telescopic boom 13 is configured to be telescopically moved by the telescopic movement of the telescopic cylinder 15. Further, between the lower surface of the telescopic boom 13 and the lower portion of the swivel table 9,
7 are pivotally connected to each other so as to be able to swing freely.
The telescopic boom 13 is configured to move up and down by the telescopic movement of. A work table 19 is attached to a tip of the telescopic boom 13 via a work table support device 30.

Next, the workbench support device will be described. As shown in FIGS. 2 and 3, the workbench support device 30 is attached to the distal end of the telescopic boom 13, and includes a leveling mechanism 31, a swing mechanism 33, and a workbench support 35. Have been. The leveling mechanism 31 includes a leveling cylinder 37 pivotally connected to the distal end of the telescopic boom 13 so as to be vertically swingable, and a leveling bracket 39 pivotally connected to the distal end of the telescopic boom 13 so as to be vertically swingable.
, And is configured. Leveling cylinder 37
Is connected to the lower end of the leveling bracket 39. The leveling bracket 39 has an inverted letter shape, and a central mounting hole (not shown) is provided at an intermediate portion thereof. The center mounting hole communicates with an insertion hole provided at the distal end of the telescopic boom 13, and the insertion shaft 41 is inserted into these holes, and the leveling bracket 39 is pivotally connected to the distal end of the telescopic boom 13 so as to be vertically swingable. Have been. An upper mounting hole (not shown) is provided in an upper portion of the leveling bracket 39.

The oscillating mechanism 33 includes an oscillating main body 43 having a built-in rotation center shaft 47 serving as a rotation center of the work table 19.
A oscillating motor (not shown), which is annularly disposed on the outside of the rotation center shaft 47 in a radial direction and rotates the work table 19 around the rotation center axis 47, and 1
And a transmission member 44 for transmitting the power to the transmission member 9. The oscillating body 43 has a cylindrical shape, and a rotation center shaft 47 extending in the vertical direction is mounted inside the oscillating body 43. A pair of mounting members 45 protruding toward the leveling bracket 39 are provided at both left and right ends of the oscillating body 43. Are provided, and through holes (not shown) are provided at both upper and lower ends of the mounting member 45. When the through hole provided above the mounting member 45 is arranged at a position communicating with the upper mounting hole provided in the leveling bracket 39, the through hole provided below the mounting member 45 It is arranged so as to communicate with the central mounting hole. The insertion shaft 41 is inserted into these communicating holes, and the swing main body 43 is mounted on the leveling bracket 39.

The oscillating motor is annularly disposed radially outside the rotation center shaft 47 and meshes with a piston (not shown) and a cylinder (not shown) annularly disposed radially outside the piston. When the piston rotates around the rotation center axis 47, the cylinder also rotates.
7. A transmission member 44 is connected to the outer peripheral wall surface of the cylinder, and upper and lower ends of the transmission member 47 protrude from the side wall of the worktable 19 and are provided with a pair of support protrusion members 49 arranged with a predetermined gap in the vertical direction. It is connected to the. That is, the workbench support section 35 includes a pair of support protrusion members 49. The workbench 19 has a bottomed rectangular tube shape, and a metal handrail is attached to an upper portion thereof. The work table 19 is made of an insulating material (for example,
FRP) can be used. In addition, the workbench 19, the workbench support section 35, and the swing mechanism section 33 are collectively referred to as a "workbench mechanism section 51" below.

Next, the operation of the workbench support device 30 according to the first embodiment of the present invention will be described for a case where the workbench mechanism 51 is mounted on a vehicle in which the leveling specifications of the aerial work vehicle 1 are changed. I do. If the leveling specification is changed and the leveling bracket 39 cannot be used as it is on the telescopic boom having a different shape from the telescopic boom 13 shown in FIG. 3 (hereinafter referred to as “specification changing boom”), a new leveling bracket is used. And attach it to the specification change boom. Then, the rod-side tip of the leveling cylinder 37 is pivotally connected to the new leveling bracket, and the work table mechanism 51 is attached to the new leveling bracket. As described above, when the leveling specification of the vehicle is changed, the leveling bracket 39 is manufactured according to the changed specification, and the workbench mechanism 51 is used as a common component, so that the new leveling bracket 39 is used in accordance with the specification change. It is possible to prevent an increase in the production of complex parts and suppress an increase in the production cost.

In the above-described embodiment, an example is shown in which the swing mechanism 33 is attached to the upper end of the leveling bracket 39. However, the present invention is not limited to this, and as shown in FIG. The swing mechanism 33 can be attached to the upper end. In this case, the transmission member 44 of the swing mechanism 33 is fixed between the distal ends of the pair of support projecting members 49, and the rotation center shaft 53 is provided in the swing main body 43. A oscillating motor (not shown) is provided radially outside the rotation center shaft 53. Note that the configuration of the swing motor and the connection relationship between the transmission member 44 and the swing motor are the same as in the above-described embodiment, and a description thereof will be omitted. When the oscillating motor operates, the work table 1 is transmitted via the transmission member 44.
9 is configured to swing about the rotation center axis 53.

As described above, by attaching the swing mechanism 33 to the upper end of the leveling bracket 39, the leveling specification is changed similarly to the case where the swing mechanism 33 is provided at the top end of the leveling bracket 39. Even when the leveling bracket 39 cannot be used as it is,
By manufacturing a leveling bracket that meets the changed specification and using the workbench mechanism 51 as a common part, it is possible to prevent an increase in the number of parts due to the specification change,
An increase in manufacturing cost can be suppressed.

[0023]

Second Embodiment A second embodiment of the workbench support device of the present invention will be described with reference to FIGS.
In the second embodiment, only differences from the first embodiment will be described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 5, a leveling bracket 39 having a triangular shape in a front view is pivotally connected to the distal end of the telescopic boom 13 so as to be vertically swingable. The lower end of the leveling bracket 39 is connected to the rod-side end of the leveling cylinder 37. In addition, the upper link member 61 and the lower link member 6 which are disposed with a predetermined gap in the vertical direction at both upper and lower ends on the distal end side of the leveling bracket 39.
3 is pivotally connected to be able to swing up and down. As shown in FIG. 6, the lower link members 63 are disposed below the left and right ends of the upper link member 61, respectively. A link bracket 65 is pivotally connected to each end of the upper link member 61 and the pair of lower link members 63, and the leveling bracket 39, the upper link member 61, and the pair of lower link members 6 are connected.
3 and the link bracket 65 form a parallelogram link mechanism 66. A swing cylinder 67 is pivotally connected between the leveling bracket 39 and the upper link member 61, and the workbench 19 can be moved in the vertical direction by extending and contracting the swing cylinder 67. The swing mechanism 33 is detachably attached to the tip of the link bracket 65. The work table 19 is attached to the swing mechanism 33 via a work table support 35.

In the above configuration, if the link bracket 65 shown in FIG. 6 cannot be used as it is in a vehicle in which the specifications of the parallelogram link mechanism 66 have been changed, a new link bracket is manufactured, and Attach to the tip of the modified parallelogram link mechanism. And. Attach the workbench mechanism 51 to the new link bracket. As described above, when the specification of the parallelogram link mechanism 66 is changed, the link bracket 65 is manufactured according to the changed specification, and the workbench mechanism 5 is manufactured.
By using 1 as a common component, an increase in the number of types of components due to a change in specifications can be prevented, and an increase in manufacturing costs can be suppressed.

As shown in FIG. 7, the upper link member 6
The link bracket 65 is attached to the tip of a parallelogram link mechanism 66 in which the vertical dimension of the lower link member 63 is increased.
When it is not possible to directly pivot the link bracket 65, the intermediate bracket 69 is sandwiched between the distal ends of the upper link member 61 and the lower link member 63 and the link bracket 65. The intermediate bracket 69 has a rectangular shape when viewed from the front.
The vertical dimension of the upper link member 61 and the lower link member 6 is larger than that of the link bracket 65.
3 has such a size that these members 61 and 63 can be pivotally connected even when the vertical dimension of the member 3 is maximally separated. The link bracket 65 is mounted on the left side of the intermediate bracket 69.

As described above, even when the link bracket 65 cannot be directly pivotally connected to the tip of the parallelogram link mechanism 66 due to the difference in the size of the parallelogram link mechanism 66,
By using the workbench mechanism 51 as a common part with the intermediate bracket 69 interposed therebetween, it is possible to prevent an increase in the number of types of parts due to a change in specifications and to suppress an increase in manufacturing costs.

In the embodiment shown in FIG. 5, an example is shown in which the workbench mechanism 51 is mounted on the distal end side of the link bracket 65. However, the present invention is not limited to this, and as shown in FIG. The swing mechanism 33 can be provided at the upper end of the 65. In this case, even if the specification of the parallelogram link mechanism 66 is changed and the link bracket 65 cannot be used as it is, the link bracket 65 is newly manufactured according to the changed specification, and the workbench mechanism 51 is shared. By using the components, it is possible to prevent an increase in the number of types of components due to a change in specifications, thereby suppressing an increase in manufacturing costs.

[0029]

As described above, according to the workbench support device for a work vehicle of the present invention, the workbench, the workbench support, and the workbench horizontal swing mechanism are common parts of the work vehicle. By using the vertical member as a changeable part of the work vehicle, even if the leveling specification of the vehicle is changed, only the vertical member needs to be newly manufactured, thereby preventing an increase in the number of types of parts accompanying the specification change. In addition, an increase in manufacturing cost can be suppressed.

Further, in a working vehicle having a parallelogram link mechanism at the end of the boom, the workbench, the workbench support portion and the workbench horizontal swinging mechanism are used as common parts of the work vehicle, and are parallelized. By using the vertical member provided at the tip of the quadrilateral link mechanism as a changeable part of the work vehicle, even if the specification of the parallelogram link mechanism is changed, only the vertical member needs to be newly manufactured. It is possible to prevent an increase in the number of types of parts due to the change and suppress an increase in manufacturing cost.

Further, when the intermediate bracket is sandwiched between the tip of the parallelogram link mechanism and the vertical member, even if the gap between the upper link member and the lower link member of the parallelogram link mechanism becomes large, The parallelogram linkage can be pivotally connected to the vertical member via the bracket. Also, the specifications of the parallelogram link mechanism have been changed by using the workbench, the workbench support, the workbench horizontal swing mechanism, and the vertical member as common parts of the vehicle, and making the intermediate bracket a changeable part. However, since only the intermediate bracket needs to be newly manufactured, it is possible to prevent an increase in the number of types of parts due to a change in specifications and to suppress an increase in manufacturing costs.

[Brief description of the drawings]

FIG. 1 is a front view of an aerial work vehicle equipped with a workbench support device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the workbench support device according to the first embodiment of the present invention.

FIG. 3 is a front view of the workbench support device according to the first embodiment of the present invention.

FIG. 4 is a front view of the workbench support device according to the first embodiment of the present invention.

FIG. 5 shows a front view of a workbench support device according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a workbench support device according to a second embodiment of the present invention.

FIG. 7 shows a front view of a workbench support device according to a second embodiment of the present invention.

FIG. 8 shows a front view of a workbench support device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Height working vehicle (work vehicle) 3 Body 13 Telescopic boom (boom) 19 Workbench 30 Workbench support device 33 Swing mechanism (Workbench horizontal swinging mechanism) 35 Workbench support 37 Leveling cylinder 39 Leveling Bracket (vertical member) 61 Upper link member 63 Lower link member 65 Link bracket (vertical member) 66 Parallelogram link mechanism 69 Intermediate bracket

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Taro Tsukioka 1152 Yamashita, Ryoke, Ryoke, Ageo City, Saitama Prefecture Inside Aichi Corporation Ageo Works (72) Inventor Norihide Masuda Daiji Higashimine Sugawa, Shinjimura, Tone County, Gunma Prefecture 414-1 Aichi Corporation Shinji Works (72) Inventor Teruichi Ito Shinjimura, Tone-gun, Gunma Prefecture 414-1 Higashimine Sugawa F term (reference) 3F333 AA08 AA15 AB01 AB04 AC01 AC08 BA12 BB03 BB09 BB23 BB26 CA15 DA03 DA09 DB04

Claims (3)

[Claims] 1. A workbench support device for a work vehicle, comprising: a boom provided at least on a vehicle body so as to be able to move up and down; and a worktable provided at the tip of the boom so as to be able to swing vertically and horizontally. A vertical member detachably attached to a tip of the boom and swingably mounted in a vertical plane with respect to the boom; one end pivotally attached to the boom, and the other end connected to the vertical member. A leveling cylinder that is detachably pivoted to and always holds the vertical member in a vertical state irrespective of the operation of raising and lowering the boom; and a workbench horizontal swinging mechanism detachably mounted above the vertical member. A workbench support attached to the workbench horizontal swing mechanism, the workbench support is attached to a side surface, and the workbench horizontal swing mechanism allows the workbench support to be horizontal with the workbench support. Worktable supporting device for a working vehicle, characterized in that it and a worktable that is swung in direction. 2. A leveling bracket is provided at the tip of the boom so as to be swingable in the vertical direction. The leveling bracket pivotally connects the tip of the leveling cylinder to the tip of the leveling bracket. The parallelogram link mechanism, which is provided with a gap and is composed of an upper link member and a lower link member, is pivotally connected, and the vertical member is swingable in the vertical direction at the tip of the parallelogram link mechanism. The workbench support device for a work vehicle according to claim 1, wherein the workbench horizontal swinging mechanism is detachably attached to a distal end of the vertical member so as to be detachably connected. 3. An intermediate bracket for removably mounting the vertical member between the vertical member and the distal end of the parallelogram link mechanism and for removably connecting the distal end of the parallelogram link mechanism. The workbench support device for a working vehicle according to claim 2, wherein