JPH10279292A - Vehicle for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform high lift work at a narrow place safely and efficiently without changing the direction of a work vehicle when the high lift work extends over the right and left sides by moving a boom transversely. SOLUTION: A work vehicle has a boom 10, a base machine 12, a first transverse travel device 14, a counterweight 16, and a second transverse travel device 18 of the counterweight 16. A work base 20 for loading worker is fixed at a tip of the boom 10. The first transverse travel device 14 moves the boom 10 along the direction of width of a vehicle body 12b from its one end side to the other end side thereof and is provided with a pair of guide rods 14a and a hydraulic cylinder 14b provided between the guide rods 14a. The weight 16 has such weight that corresponds to load of the boom 10 including a support base. The second transverse travel device 18 which moves the weight 16 in the transverse direction is provided with a guide rod 18a and a hydraulic cylinder 18b in the same way as the first transverse travel device 14. The boom 10 and the weight 16 are moved in the direction of width of the vehicle body 12b in different directions by the first and second transverse travel devices 14, 18.

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, and more particularly to an aerial work vehicle capable of performing an aerial work even in a narrow place.

[0002]

2. Description of the Related Art Work at high places in various works such as laying power and telephone lines, laying road signs and lighting, repairing interior and exterior of building structures, and installing soundproofing walls of viaducts. In such cases, aerial work vehicles are usually used.

As shown in FIG. 6, for example, this type of aerial work vehicle includes a telescopic boom 2 provided with a workbench 1 for mounting a worker at a tip thereof, and a base machine supporting the boom 2. There is one provided with 3.

[0004] In the aerial work vehicle shown in FIG.
However, from the viewpoint of the stability and structure of the vehicle body, they are provided substantially on the central axis of the base machine 3. However, the aerial work vehicle having such a structure has a technical problem described below.

[0005]

That is, in this type of aerial work vehicle, as the height of the work table 1 increases, the width of the base machine 3 increases due to the stability of the vehicle body, and the area occupied by the work is increased. Has a tendency to become wider.

However, if the boom 2 is arranged on the center axis of the base machine 3 as in a conventional high work cart, as shown in FIG. Then, the body of the base machine 3 is turned to bring the work table 1 close to the place where the work is performed at a high place. In this case, when the body is turned, an occupied area larger than the width of the body is required. And work in narrow spaces becomes difficult.

[0008] As shown in FIG. 8, when a work vehicle is installed under the overpass 4 to perform work at a high place on the overpass,
If the boom 2 is arranged on the center axis of the base machine 3, even if the boom 2 is brought close to the elevated 4, the base machine 3 will jump out to the side, so that the work may be performed beyond the site boundary line. There was also a problem that it could not be done.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an aerial work vehicle capable of working in a narrow place.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a telescopic boom provided with a work table for mounting a worker at a tip thereof, and a base machine for supporting the boom. In the aerial work vehicle, a first lateral moving device that moves the boom along the width direction of the base machine, a counterweight having a weight corresponding to the load of the boom, and the counterweight used to move the boom. And a second lateral moving device for moving in the opposite direction. According to the aerial work vehicle configured as described above, the boom can be moved along the width direction of the base machine by the first lateral movement device. When approaching to the side where the work at a high place is performed, the work becomes possible, and the occupied area does not exceed the width of the base machine. Also, when working at heights with a work vehicle installed under the overpass, install the base machine under the overpass, move the boom in the width direction of the base machine, and follow the elevated portion, the base machine will be This prevents large jumps to the site boundary. Further, when the boom is moved in the width direction, the counterweight is moved in the opposite direction by the second lateral movement device, so that the stability of the vehicle body can be secured. The front end side of the boom can be bent into an L-shape, and when this configuration is adopted, the amount of protrusion to the site boundary line side can be further reduced in work at a high place where a work vehicle is installed under an overpass. it can. The second lateral movement device may be operated in conjunction with the movement of the first lateral movement device. With this configuration, the stability of the vehicle body can be automatically secured.

[0010]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIGS. 1 to 3 show an embodiment of an aerial work vehicle according to the present invention. The aerial work vehicle shown in FIG. 1 has a built-in telescopic jack (not shown) therein, and a boom 10, a base machine 12, a first lateral moving device 14, and a counterweight which are configured to be vertically expandable and contractible. 16 and a second lateral moving device 18 for the counterweight 16.

The base machine 12 includes a caterpillar-type traveling section 12a and a vehicle body 12 mounted on the traveling section 12a.
b. On the vehicle body 12b, a boom 10
A base machine 12, a first lateral moving device 14, a counterweight 16, and a second lateral moving device 18 of the counterweight 16 are installed.

At the end of the boom 10, a workbench 20 for mounting a worker is fixedly provided. The boom 10 includes a support 22
And is spaced apart from the counterweight 16 in the front-rear direction as shown in FIG.

The first lateral moving device 14 moves the boom 10 from one end to the other end thereof along the width direction of the vehicle body 12b, and includes a pair of guide rods extending parallel to the width direction of the vehicle body 12a. 14a and a hydraulic cylinder 14b provided between the guide rods 14a.

The guide rod 14a is inserted and installed so as to penetrate a bracket 22a provided below the support base 22 of the boom 10, and the telescopic rod 14c of the hydraulic cylinder 14b is disposed at the center between the guide rods 14a. The tip is fixed to the support base 22.

The counterweight 16 has a weight corresponding to the load of the boom 10 including the support base 22. The second lateral moving device 18 for moving the counterweight 16 in the lateral direction includes a pair of guide rods 18a and a hydraulic cylinder 18b, like the first lateral moving device 14.
Each guide rod 18a and hydraulic cylinder 18b are provided with a counterweight 16 in the same form as the first lateral movement device 14.
Is joined to.

In this embodiment, the boom 10 and the counterweight 16 are moved in different directions by the first and second lateral movement devices 14 and 18 in the width direction of the vehicle body 12b.

For this movement, for example, a sensor for detecting the amount of expansion and contraction of the telescopic rod is provided in each of the hydraulic cylinders 14b and 18b, and when the boom 10 is moved to one side by the hydraulic cylinder 14b, the counter weight 16 is moved. The second lateral movement device 18 is operated in conjunction with the movement of the first lateral movement device 14 so as to move in the opposite direction by the same amount.

In this state, the boom 10 is moved to the vehicle body 12b.
When the boom 10 is moved in the width direction, the load of the boom 10 and the weight of the counterweight 16 are balanced, so that the stability of the vehicle body 12b can be always ensured in the process of moving the boom 10.

Now, in the aerial work vehicle configured as described above, as shown in FIG.
When performing high-altitude work on an elevated site, use the lateral movement device 14,1
6, the boom 10 is moved laterally to one end in the width direction of the vehicle body 12b so that the boom 10 approaches the elevated side on the site boundary line side.

Performing high-altitude work in such a state can prevent the base machine 12 from greatly jumping out to the site boundary line side, so that high-level work can be performed in a narrow place where the site boundary line is close to an overpass. It can be done easily.

In the case of the present embodiment, the boom 10 can be moved along the width direction of the base machine 12 by the first lateral moving device 14, so that the boom 10 can be moved to the side of the base machine 12 as shown in FIG. When performing the high-place work, the work can be performed by moving the boom 10 to the side where the high-place work is performed, so that the occupied area does not exceed the width of the base machine 12.

In this case, when the boom 10 is moved in the width direction, the counterweight 16 is moved in the opposite direction by the second lateral movement device 18, so that the stability of the vehicle body 12b can be secured.

FIG. 5 shows another embodiment of an aerial work vehicle according to the present invention, in which the same or corresponding parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
Hereinafter, only the characteristic points will be described.

In the embodiment shown in FIG.
It is bent in the shape of a letter. In the aerial work vehicle having such a configuration, the amount of the base machine 12 protruding toward the site boundary line is smaller than that in the case shown in FIG. 4, so that the aerial work in a more narrow place can be performed. .

[0025]

As described in detail in the above embodiments, according to the aerial work vehicle of the present invention, aerial work in a narrow place can be performed safely and efficiently. In addition, since the boom can be moved laterally, when the work at a high place straddles the left and right, the work can be performed without changing the direction of the work vehicle, and labor and labor can be saved.

[Brief description of the drawings]

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

FIG. 2 is a plan view of FIG.

FIG. 3 is an explanatory view of a main part of the lateral movement device of FIG. 1;

FIG. 4 is an explanatory view of a use state of the aerial work vehicle of FIG. 1;

FIG. 5 is an explanatory diagram of a use state of another embodiment of the aerial work vehicle according to the present invention.

FIG. 6 is an explanatory view of a conventional aerial work vehicle.

FIG. 7 is an explanatory diagram of a use state of a conventional aerial work vehicle.

FIG. 8 is an explanatory diagram of another usage state of the conventional aerial work vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Boom 12 Base machine 12b Body 14 First lateral moving device 14a Guide rod 14b Hydraulic cylinder 16 Counter weight 18 Second lateral moving device

Claims (3)

[Claims] 1. An aerial work vehicle comprising a telescopic boom provided with a workbench for mounting a worker at a tip thereof, and a base machine supporting the boom, wherein the boom is moved in a width direction of the base machine. A first lateral moving device that moves along the boom, a counterweight having a weight corresponding to the load of the boom, and a second lateral moving device that moves the counterweight in the opposite direction as the boom moves. An aerial work vehicle characterized by the following. 2. The aerial work vehicle according to claim 1, wherein a tip end side of the boom is bent into an L shape. 3. The aerial work vehicle according to claim 1, wherein the second lateral movement device operates in conjunction with movement of the first lateral movement device.