JPH05294600A - Boom supporting structure of vehicle for high spot work - Google Patents

Abstract

PURPOSE:To safely perform high lift work by always vertically supporting the lifting body of a vehicle for high spot work. CONSTITUTION:A lifting body (4) comprising a boom (7) and retractable boom (10) is liftably provided on the top of a traveling truck (1), and a work bench (5) is provided on the top of the lifting body (4). In a vehicle for high lift work comprising the lower section of the lifting body (4) rotatably connected to a boom bracket (8) through a horizontal shaft(retractable boom) (10), a cross direction swingable fulcrum (17) of the boom bracket (8) is also provided near the line linking the right and left axles (18) and (18), and an actuator (20) for adjustment is arranged between the boom bracket (8) and the truck (1).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle in which a work platform is provided on an upper part of an elevating body which is vertically movable.

[0002]

2. Description of the Related Art Conventionally, as a boom type aerial work vehicle having an upper workbench, there has been, for example, the one described in Japanese Utility Model Laid-Open No. 62-179300. Since the device can be raised and lowered and can be expanded and contracted, the upper workbench can be installed high.

[0003]

However, in the above boom type aerial work vehicle, since the boom device rotates up and down around the fulcrum shaft located in the lateral direction of the machine body, the ground surface of the work site is reduced. The boom device was lifted vertically only when the ground was horizontal, and the boom device was tilted to the left and right when the ground surface was not horizontal. Therefore, in particular,
When constructing a wall surface of a building or the like, the upper workbench does not rise in the state of being close to the wall surface, so not only can various construction be efficiently performed, but also the entire body is unstable, which is dangerous.

[0004]

According to the present invention, an elevating body composed of a boom and a telescopic boom is provided on the upper part of a traveling carriage so as to be able to move up and down, and a work platform is provided on the upper part of the elevating body.
In an aerial work vehicle in which the lower part of the lifting body is rotatably connected to a boom bracket via a horizontal shaft, the horizontal swing fulcrum of the boom bracket is provided close to the line connecting the left and right axles, and The present invention provides a boom support structure for an aerial work vehicle in which an adjusting actuator is provided between the boom bracket and the traveling carriage.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a traveling carriage having front wheels 2 and rear wheels 3 on the left and right sides. A boom-shaped lifting body 4 that moves up and down is provided. An upper workbench 5 is provided on the upper part of the lifting body 4.

Reference numeral 7 is a boom of the lifting body 4, and a base portion 7-1 of the boom 7 is pivotally attached to a boom bracket 8.

Reference numeral 9 denotes a boom bracket 8 at the lower end of the boom 7.
A horizontal axis pivotally attached to the boom 10, 10 is a telescopic boom that is telescopically fitted to the upper portion of the boom 7, and the work arm is mounted on the upper portion of the telescopic boom 10 via a mounting arm 11, a support link 12, and a parallel cylinder 13. Fifteen are always connected horizontally. The boom 7 and the telescopic boom 10 constitute the lifting body 4.

Reference numeral 14 is a hoisting cylinder for hoisting the boom-shaped lifting and lowering body 4 up and down, and 15 is a support portion for supporting the base end portion 8-1 of the boom bracket 8 through the front and rear shafts 16. It is located on the front and back of the.

The support portion 15 and the front-rear shaft 16 serve as a swing fulcrum 17 for the boom 7 and the boom bracket 8.
Reference numeral 18 is an axle that pivotally supports the left and right rear wheels 3 and 3, respectively, and a swing fulcrum 17 of the elevating body 4 is located close to a line 19 connecting the left and right axles 18, 18.

Reference numeral 20 denotes an adjusting actuator arranged between the boom bracket 8 and the traveling carriage 1, and the boom bracket 8 is expanded and contracted by the adjusting actuator 20.
Also, the lifting body 4 can be tilted in the left-right direction.

Reference numeral 21 is a support portion for supporting the wheels 3, 3, and 22 is an operation portion provided on the upper workbench 5. The work vehicle A, the work platform 5, the work platform 5, etc.
Are configured.

The embodiment of the present invention is configured as described above, and when a work such as a building is to be carried out by the above work vehicle A, the work vehicle A is run to the work site. Then, the elevating body 4 is raised along the outer wall a of the building or the like. In this case, when the ground surface on which the traveling carriage 1 is placed is the inclined surface b, the adjusting actuator 20 is expanded and contracted to position the boom bracket and the lifting body 4 in a vertical state along the outer wall a of the building. ..

Therefore, according to the above-described embodiment, since the lifting / lowering body 4 having the workbench 5 approaches the line connecting the left and right axles 18, 18 and can swing right and left, the ground of the work site can be swung. Even if the surface is an inclined surface, the lifting body 4 can be positioned vertically.

Since the machine body can be installed in a stable state, various work at height can be performed safely and efficiently.

Further, since the clearance between the wall surface of a building or the like and the workbench can be adjusted freely, the wall wrinkle work is easy and at the same time,
Part mounting work can be done reliably.

Further, when the vertical body is always supported vertically by automatic control by incorporating an angle sensor, a microcomputer control, etc., it is possible to prevent the body from tipping over in the lateral direction and further improve the safety. is there.

[0017]

According to the present invention, the elevating body having the upper workbench can be swung left and right by approaching the line connecting the left and right axles, so that the ground surface of the work site is an inclined surface. Even if there is, the lifting body can be positioned vertically.

Further, since the machine body can be installed in a stable state, various work in high places can be carried out safely and efficiently.

Further, since the clearance between the wall surface of the building or the like and the workbench can be adjusted freely, the wall wrinkle work is easy and
Part mounting work can be done reliably.

Further, in the case where the vertical body is always supported vertically by automatic control by incorporating an angle sensor, a microcomputer control, etc., it is possible to prevent an accidental fall of the machine body in the lateral direction and further improve safety. ..

[Brief description of drawings]

FIG. 1 is a schematic side view of an aerial work vehicle according to the present invention.

FIG. 2 is a schematic rear view showing a boom support structure of the work vehicle of the same height.

[Explanation of symbols]

 1 Traveling vehicle 4 Elevating body 4-1 Base end 5 Upper workbench 7 Boom 8 Boom bracket 10 Telescopic boom 17 Swing fulcrum 18 Axle 20 Axes for adjustment

Claims (1)

[Claims] 1. An elevating body (4) composed of a boom (7) and a telescopic boom (10) is provided on the upper part of the traveling carriage (1) so as to be able to move up and down, and a work platform is arranged on the upper part of the elevating body (4). (5) is provided, and in the aerial work vehicle in which the lower part of the lifting body (4) is rotatably connected to the boom bracket (8) via the horizontal shaft (10), the left and right axles (18), Provide the horizontal swing fulcrum (17) of the boom bracket (8) close to the line connecting (18), and
A boom support structure for an aerial work vehicle in which an adjusting actuator (20) is arranged between the boom bracket (8) and the traveling carriage (1).