JP2886098B2 - Work platform tread plate equipment for aerial work vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tread plate device provided on a workbench used when a worker moves from a workbench of an aerial work platform to a building or the like.

[0002]

2. Description of the Related Art Conventionally, when moving to a building or the like in order to work inside a building or the like from a work platform of an aerial work platform, the work table is controlled and the work table is brought close to the building. He opened the door and moved to a building.

[0003]

However, it is difficult to move the workbench close to the building by operating the workbench, because if the workbench is too close, the workbench will hit the building and be damaged. Distance was necessary, and it was very dangerous to move over the building beyond this distance.

[0004] Further, if the door locking device is accidentally released while the work table is being moved, the door may be suddenly opened and the worker may fall down, and the work cannot be performed with security. Therefore, an object of the present invention is to make it possible to safely transfer even if there is a certain distance between the work table and the building. Another object of the present invention is to prevent the door from being opened by mistake while the work table is moving.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an aerial work vehicle in which a workbench is provided on a vehicle body so as to be able to move up and down. A first feature is that a door is provided, and a tread plate is provided on the outer side surface of the worktable corresponding to the door so as to be vertically rotatable.

Further, in a high-altitude work vehicle in which a work table is provided on a vehicle body so as to be able to move up and down, a door is provided on a side surface of the work table, and a side part of the side surface of the work table corresponding to the door is provided. A detecting device for detecting a building or the like when the tread plate is rotated downward is provided below the tip of the tread plate, and a locking device is provided between the door and the side of the worktable; A second feature is that a release means is provided for releasing the lock device upon detection of.

[0007]

[Function] When moving from a workbench to a building,
First, control the workbench and bring it closer to the building. Next, the treads are knocked down and the tip of the treads is supported by the building.
After that, open the door of the workbench and transfer to the building through the tread. Further, when the tip of the tread is supported by the building, the detecting means is detected and the locking device is released by the releasing means, so that the door can be opened.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an aerial work vehicle. The aerial work vehicle 1 has a carrier 3 mounted on a vehicle body 2 and a post 4 on the carrier 3.
Is provided so as to be able to turn. A boom device 5 is provided on the post 4 so that the boom device 5 can be raised and lowered. The boom device 5 is supported by the post 4 and can be raised and lowered by a lifting cylinder 6. And a second boom 8 fitted into the second boom 8. A work table 9 is attached to the tip of the second boom 8 of the boom device 5.

The work table 9 is, as shown in FIG.
0, front and rear side surfaces 11 and 12 and left and right side surfaces 13 and 14
And a grounding pipe 15. A door 16 is provided on the rear side surface 12 so as to be openable and closable inside, and the door 16 constitutes a part of the rear side surface 12. The door 16 has an engagement piece 1 having an engagement hole 17 as shown in FIG.
8 is provided, while the rear side 12 has a solenoid 19
The rod 20 of the solenoid 19 expands and contracts and engages with the engagement hole 17 of the engagement piece 18. The solenoid 19 and the engagement piece 18 constitute a lock device 21.

Next, as shown in FIG. 2, a tread device 22 is provided outside the rear side surface 12 corresponding to the door 16, and the tread device 22 includes a tread plate 23, a base portion of the tread plate 23 and an intermediate portion. A first pipe 25 having a shaft support 24 at the tip and
25, second pipes 26, 26, third pipes 27, 2
7, handrails 29, 29 that are pivotally supported at the tips of the pipes 25, 25, 26, 26, 27, 27, and mounting pieces 30 provided between the first pipes 25, 25 and the side surface 12.
And the support pieces 31 provided between the first pipes 25 and the ground pipe 15.

The tread plate 23, the handrails 29, 29 and the pipes 25, 25, 26, 26, 27, 27 constitute a parallel link mechanism A, and the first pipes 25, 25 are
2, the tread plate 23 is vertically rotatable between the extended position in FIG. 2 and the retracted position in FIG.
In the storage position of the tread 23, as shown in FIG.
The tread plate 23 is fastened to the side surface 12 of the work table 9 by inserting a buckling pin 35 into the pin hole 33 of the bracket 32 provided in the pipe 25 and the pin hole 34 of the tread plate 23.

In FIG. 2, reference numeral 36 denotes a touch sensor which is a detecting means provided below the tip of the tread plate 23. Reference numeral 37 denotes an operation panel provided on the work table 9, which is provided with an operation lever 38 for controlling the work table 9 and switches 39 and 40. 41 is a building. Next, FIG. 5 is an electric circuit diagram, in which the main switch 42 is interposed in the main circuit 42, and the main circuit 4
The touch sensor 36 and the solenoid 19 are interposed in the first circuit 43 between the touch sensors 36 and 2, and the second circuit 44 in which the manual release switch 40 is interposed includes the touch sensor 36 and the solenoid 1.
9 connected to the first circuit 43. Touch sensor 36
The solenoid 19 constitutes a release means.

The operation of the present invention having the above-described structure will now be described. When transferring to the building 41 from the work table 9 of the aerial work vehicle 1, the worker first jumps on the work table 9 by riding on the left side surface 14 of the work table 9 from the loading platform 3. Then, the operator pushes the main switch 39 of the operation panel 37 to operate the operation lever 38 to control the work table 9 and stop the work table 9 by approaching the building 41 to some extent.

Next, when the tread plate 23 is turned down after removing the waist breaker pin 35 of FIG. At this time, the handrails 29, 29 also rotate downward from the storage position to the extended position by the parallel link mechanism A. Then, the touch sensor 36 as a detecting means detects the building 41 and comes into contact therewith, the first circuit 43 of FIG.
Operates.

Then, in FIG. 3, the rod 20 is reduced from the solid line position to the chain line position, separated from the engagement piece 18, and the lock of the lock device 21 is released. Thereafter, the door 16 can be opened inward, and the user can safely transfer to the building through the tread plate 23 while holding the handrails 29, 29. When the user moves from the building 41 to the work table 9 and returns to the ground, the order may be reversed.

[0016]

As described above, according to the first feature of the present invention, since the workbench is provided with the door and the vertically turnable tread,
When moving from a worktable to a building or the like, even if there is a certain distance between the worktable and the building, it is possible to safely move by rotating the tread and supporting the tip of the tread to the building.

According to the second feature, when the tread is supported by the building, the door locking device is released by the detecting means, so that the door does not open suddenly while the work table is moving. Work can be done with peace of mind.

[Brief description of the drawings]

FIG. 1 is an overall view of an aerial work vehicle equipped with a workbench tread device according to the present invention.

FIG. 2 is a perspective view of a tread device for a workbench according to the present invention.

FIG. 3 is a detailed view of a door locking device.

FIG. 4 is a detailed sectional view showing securing of a tread plate to a worktable.

FIG. 5 is an electric circuit diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Height working vehicle 2 Body 9 Work table 16 Door 19 Solenoid 21 Lock device 22 Tread plate device 23 Tread plate 36 Touch sensor

Claims (2)

(57) [Claims] An aerial work vehicle in which a work table is provided on a vehicle body so as to be able to ascend and descend, a door forming a part of a side surface is provided on a side surface of the work table, and a side outer surface of the work table corresponding to the door is provided. A work platform tread plate device for an aerial work vehicle, wherein a tread plate is provided to be vertically rotatable. 2. An aerial work vehicle in which a work table is provided on a vehicle body so as to be able to move up and down, a door forming a part of a side surface is provided on a side surface of the work table, and a side surface of the work table corresponding to the door is provided. A detecting device for detecting a building or the like when the tread plate is rotated downward is provided below the tip of the tread plate, and a locking device is provided between the door and the side of the worktable; And a stepping device for a workbench in an aerial work vehicle, comprising a release means for releasing the lock device upon detection of the lock device.