JPH0840263A - Crawler type working vehicle - Google Patents

Abstract

PURPOSE:To obtain a crawler type working vehicle which can travel on a rail for railroad on an unlevelled ground, too, of course on a levelled ground. CONSTITUTION:On the ground contact surface of a crawler shoe 23 which constitutes a crawler belt, a recessed-shaped rail contact groove 23c which can be fitted at the head part of a rail R for railroad extends in the longitudinal direction of the crawler belt. Accordingly, in the traveling on the rail R, traveling is performed, guiding the head part of the rail R for railroad by the recessed shape of the rail contact groove 23c, and the crawler belt is prevented from slipping off from the rail R for railroad during the traveling, and the stable traveling on the rail R is enabled, and also the traveling on an unlevelled ground, of course on the levelled ground is enabled by the crawler belt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler type work vehicle, and more particularly to a crawler type work vehicle constructed so that it can run not only on rough terrain but also on a track.

[0002]

2. Description of the Related Art For example, as an aerial work vehicle capable of moving workers and luggage to a desired high place at a construction site or the like, a workbench is mounted on a vehicle body through an elevating device and A traveling device for traveling is provided. In such an aerial work vehicle, the vehicle body is run to a position below a desired work position and the workbench is raised to move an operator or the like to a desired height. here,
BACKGROUND ART As a traveling device for an aerial work vehicle, there is a crawler traveling device configured by winding a crawler belt between a drive sprocket arranged on a vehicle body and driven wheels. An aerial work vehicle equipped with such a crawler traveling device can travel not only on a leveled road surface but also on an uneven terrain, and thus can efficiently perform aerial work.

Further, the aerial work vehicle is used not only in the construction site as described above but also in erection of an overhead line on a track, inspection and maintenance, etc. The aerial work vehicle traveling device used on a track is mounted on a track (on a rail for rails) by attaching track running wheels such as train wheels to the vehicle body.
Is configured so that it can travel and can be moved to a work position.

[0004]

Here, for example, in a railway construction site where a new rail is laid, from the high position of the place where the rail has already been laid, to the irregular ground where the rail has not been laid yet. In some cases, it may be necessary to continue working at an elevated position in the same place. In such a case,
Since a high-altitude work vehicle that travels on orbit cannot run on uneven terrain as it is, it is necessary for the worker to change the aerial work vehicle and also to reload work equipment, etc. In addition, it is necessary to prepare two aerial work vehicles, which causes a problem of increasing work cost.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a crawler type work vehicle capable of traveling on an orbit, including on a leveled road and an uneven terrain.

[0006]

In order to achieve the above object, a crawler type working vehicle according to the present invention is a crawler which is wound around a driving sprocket and driven wheels arranged in front of and behind the vehicle body. A crawler-type traveling device including a crawler belt in which a concave rail contact groove that can be fitted to the head of a rail for rail extends in the front-rear direction of the crawler belt is provided on the ground surface of the belt. According to such a crawler work vehicle, the rail contact groove is positioned at the head of the rail for rail, and the sprocket is driven to rotate, so that the head of the rail for rail is guided by the concave shape of the rail contact groove. Since the vehicle travels, the crawler belt does not come off from the rail for the railway during traveling, and stable traveling on the track is possible.

When the crawler belt is a crawler belt formed by connecting a plurality of rubber crawler shoes each having a cored bar coated with rubber, or a crawler belt integrally formed of rubber, a track is formed. It is possible to prevent damage to the rail when traveling over.

Further, the crawler type traveling devices are arranged on the left and right sides of the vehicle body, and the interval between the rail contact grooves in each of these crawler type traveling devices is set to be the same as the interval between the two railway rails laid. In the crawler type work vehicle, it is possible to travel on the track as it is after traveling on the road.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. First, a crawler type aerial work vehicle, which is an example of the crawler type work vehicle according to the present invention, will be described with reference to FIG. This aerial work vehicle 10 includes a vehicle body 1
The crawler type traveling device 20 is provided on the left and right sides of the vehicle 1, and the traveling device 20 is configured to travel freely. A scissor link 12 is mounted on the vehicle body 11, and a workbench 13 is arranged at the upper end of the scissor link 12. The scissor link 12 is adapted to be vertically expanded and contracted by an elevating cylinder (not shown), and the workbench 13 is vertically moved in accordance with the expansion and contraction of the elevating cylinder. still,
The workbench 13 is provided with a handrail 13a for protecting the boarded worker.

The crawler traveling devices 20, 20 are mounted on the vehicle body 11
Are arranged on the left and right sides of the vehicle body 11 with the same structure, and are constructed by a crawler belt 23 wound around driving sprocket 21 disposed on the front portion of the vehicle body 11 and driven wheels 22 disposed on the rear portion of the vehicle body 11. ing. An intermediate roller 24 is arranged in the intermediate portion of the vehicle body 11 between the drive sprocket 21 and the driven wheel 22. Then, the crawler belt 23 is rotated by rotating the driving sprocket 21 by the driving force of a driving means (not shown) provided in the vehicle body 11.
Is rotated to drive the vehicle body 11. The traveling direction of the vehicle body 11 is changed by changing the rotation direction of the drive sprocket 21, and the steering control of the vehicle body 11 is performed by controlling the traveling speed of the left and right crawler traveling devices 20, 20 (the driving sprocket wheels 21, 21). This is done by changing the rotation speed).

The crawler belt in the crawler traveling device 20 configured as described above is an endless track formed by connecting a plurality of crawler shoes 23 in a strip shape, and can be used not only for running on rough terrain but also on track (railway rails). It is formed in a shape as shown in FIG. These crawler shoes 23 are so-called rubber crawler shoes formed by a cored bar (metal crawler shoe) 23a and a rubber 23b formed so as to cover the cored bar 23a. At the center of the crawler shoe 23 in the width direction on the ground contact surface (outer periphery), the width is slightly wider than the width of the head portion R'of the rail for rail (hereinafter referred to simply as "rail") R laid on the sleeper M. A rail contact groove 23c having a width and having a depth that covers the head portion R'is formed in a concave shape so that the rail contact portion 23 'can be fitted into the rail head portion R'. Also,
A meshing portion 23d that meshes with the sprockets 21 and 21 rotatably driven by a driving unit disposed in the vehicle body 11 is formed in the center portion in the width direction on the inner circumference of the crawler belt 23.

Here, in the aerial work vehicle 10, the sprockets 21, 21 are arranged on the left and right sides of the vehicle body 11 with the same width as the width W of the two rails R, R. As a result, the rail contact groove 23 formed on the crawler shoes 23, 23 is formed.
The widths of c and 23c are the same as the width W of the rails R and R.
As a result, on a leveled road and rough terrain,
It is possible to travel by grounding the grounding portion 23e of the crawler shoe 23. When traveling on the rails R, R, steering control of the vehicle body 11 is performed to move the rail contact grooves 23c, 23c to the head of the rail. By positioning the rails R and R'on the rails R and R, the rails R and R can be easily mounted on the rails R and R without removing the crawler traveling devices 20 and 20.
You can drive over.

According to the aerial work vehicle 10 thus constructed, as shown in FIG. 1, the scissors link 12 is extended to move the workbench 13 to a high place, and the rail R,
By running on the R, it is possible to efficiently perform continuous work at a high place such as work for erection of overhead lines. Then, even when the place where the work is performed at a high place is a place where the rail is not yet laid, it is possible to run on the road as it is without the rails R, R. Here, the traveling device 20
Since it is a crawler type traveling device, it can easily travel not only on a leveled road but also on an uneven terrain, so that work at high altitude can be performed efficiently.

Although the crawler shoe 23 in the crawler traveling device 20 is a crawler shoe having a cored bar coated with rubber in the above embodiment, the present invention is not limited to this. It may be a crawler belt configured by connecting metal crawler shoes without rubber coating. Further, as shown in FIG. 3, the crawler belt 33 is integrally formed of rubber, and the crawler belt 33 is formed integrally with the crawler belt 33 at the center thereof as shown in FIG. Similar rail contact groove 33c
The crawler traveling device 30 may be provided with the above. In FIG. 3, the configuration of the aerial work vehicle 10 other than the crawler belt 33 in the crawler traveling device 30 is the same as that of the aerial work vehicle, and therefore, the same reference numerals are given and the description thereof will be omitted.

Further, in the above embodiment, the aerial work vehicle in which the crawler traveling devices are arranged on the left and right sides of the vehicle body has been described, but one crawler belt wider than the width of the rail is arranged in the center of the vehicle body. However, two rail contact grooves may be formed on the left and right of the crawler belt.
Further, in the above embodiment, the case where the crawler work vehicle is an aerial work vehicle has been described as an example, but the present invention is not limited to the aerial work vehicle, and other work vehicles may be used. good.

[0016]

As described above, according to the crawler type traveling device for a crawler type work vehicle of the present invention, the crawler belt has a ground contact surface with a concave rail contact groove which can be fitted to the head of a railroad rail. It is formed so as to extend in the front-back direction of the belt. As a result, when traveling on a track, the rail contact groove has a concave shape to guide the head of the rail for rail travel, so the crawler belt does not come off from the rail for rail during travel, and stable on-track travel is possible. And
The crawler belt allows the vehicle to run on rough terrain as well as on terrain.

When the crawler belt is a crawler belt in which a plurality of rubber crawler shoes each having a cored bar coated with rubber are connected or a crawler belt integrally formed of rubber, the crawler belt travels on a track. The damage to the rail can be suppressed. Further, crawler type traveling devices are arranged on the left and right sides of the vehicle body, and the distance between the rail contact grooves in each of these crawler type traveling devices is set to be the same as the distance between the two railway rails laid. With a work vehicle, it is possible to travel on the track as it is after traveling on the road, so it is possible to perform work efficiently without separately preparing work vehicles for road use and track use. .

[Brief description of drawings]

FIG. 1 is a perspective view of an aerial work vehicle which is an example of a crawler type work vehicle according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view of an aerial work vehicle provided with a crawler type traveling device according to another embodiment of the present invention.

[Explanation of symbols]

 10 Aerial work vehicle 11 Vehicle body 12 Scissors link 15 Work table 20, 30 Crawler type traveling device 23c, 33c Rail contact groove R Rail for rail

Claims (4)

[Claims] 1. A drive sprocket disposed in front of or behind a vehicle body, a driven wheel disposed on the other side of the vehicle body, and a recessed rail contact groove that can be fitted to the head of a rail for railroad. Is a crawler type working vehicle provided with a crawler type traveling device formed in the ground contact surface extending in the front-rear direction of the vehicle body and comprising the sprocket and a crawler belt wound around the driven wheels, wherein the rail contact groove A crawler-type work vehicle characterized in that it is configured to be able to travel on the rail for rail by locating at the head of the rail for rail. 2. The crawler belt according to claim 1, wherein the crawler belt is a crawler belt configured by connecting a plurality of rubber crawler shoes each having an outer periphery of a core metal coated with rubber. Work vehicle. 3. The crawler-type work vehicle according to claim 1, wherein the crawler belt is a crawler belt integrally formed of rubber. 4. The crawler type traveling device is arranged on the left and right sides of the vehicle body, and the rail contact grooves of each crawler type traveling device are arranged at the same interval as that of the two railway rails. The crawler type work vehicle according to claim 1, wherein the crawler type work vehicle is set.