JPH1111303A - Safety device for track work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device for a track work vehicle whereby at track running time, a jack can be placed always in a completely stored condition. SOLUTION: By information from a grounding reaction detector 24, in the case of detecting grounding reaction acting in a jack 15, in a controller 26, a running regulator device 27 is operated, running is regulated. When a track ground vehicle (track work vehicle) is placed on a rail, in extending/contracting operation of the jack 15, only automatic jack operation is performed. In this way, at running time, grounding reaction is prevented from acting in the jack 15, and in the case with no grounding reaction acting in the jack, it is placed in a completely stored condition. Consequently, at rail running time, the jack can be always placed in a completely stored condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a track work vehicle which is configured to be able to run on a track and has a jack for supporting a vehicle body during work.

[0002]

2. Description of the Related Art A track work vehicle that performs construction and inspection of railway equipment such as a trolley wire and a trolley wire on a rail R has iron wheels (track running wheels). It is possible. On the vehicle body, for example, a working device such as a high altitude working device including a boom that is freely mounted on the vehicle body, which can be freely turned, raised, contracted, and the like, and a work platform for a worker mounted at the end of the boom. Is provided. In this type of track work vehicle, jacks are further attached to, for example, the front, rear, left, and right sides of the vehicle body, and the jack can be extended downward to support the vehicle body during work.

According to the track work vehicle constructed as described above, the work platform travels to the work site by traveling on the track, and while the vehicle body is stably supported by the jack, for example, the boom is operated to move the work table to a desired height. , And the worker who got on the work table can perform construction, inspection, and the like of the overhead wire and the trolley wire on the rail R.

[0004] Generally, this type of railroad work vehicle is provided with travel restricting means for restricting the traveling of the jack when a ground reaction force is acting on the jack, while the jack supports the vehicle body. Is configured not to run.

[0005]

However, a track work vehicle provided with such a travel restricting means can travel if no ground reaction force acts on the jack.
The driver may drive with the jack not fully retracted. When traveling in such a state, there is a problem that the lower end of the jack may come into contact with a sleeper or the like during traveling, and the jack-related device may be damaged.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a safety device for a track work vehicle that can always keep a jack completely retracted during track running. I have.

[0007]

In order to achieve the above object, a safety device of the present invention includes a track running wheel, and a jack extending downward from a completely retracted position to lift and support a vehicle body, A track work vehicle safety device configured to store the jack during track running and run using the track running wheels, and an automatic jack operation control means,
And a travel restricting means.

[0008] The automatic jack operation control means includes an extension operation from the vehicle support position to a vehicle support position in which the jack extends downward from the completely retracted position to contact the lower end and a predetermined ground reaction force is applied. It is configured to automatically perform the contraction operation until the contraction operation is performed upward to reach the complete storage position. Then, the traveling restricting means is configured to permit the track work vehicle to travel on the track only when the ground reaction force acting on the jack detected by the jack reaction force detecting means is zero.

According to such a configuration, the operation of the jack is controlled by the automatic jack operation control means.
If no ground reaction force acts on the jack, the jack is in the completely retracted position. For this reason, during track running,
The jack can always be completely stored.

The track work vehicle has road running wheels in addition to the track running wheels. The track working vehicle stores the track running wheels during running on the road and runs using the road running wheels. A track-and-land vehicle may be configured to run with the vehicle wheels protruding on a track. In this case, in addition to the automatic jack operation control means, a manual jack operation control means for performing the expansion and contraction operation of the jack by manual operation is provided, and a selection means for switching between the automatic jack operation control means and the manual jack operation control means; Iron wheel position detecting means for detecting the overhang position of the traveling wheel, and when the information from the iron wheel position detecting means detects that the track running wheel is overhanging on the track, the selection means is switched. Regardless of the state, only the expansion and contraction operation of the jack by the automatic jack operation control means is enabled, and when it is detected that the track running wheels are stored, the switching state of the selection means is enabled, and the selected jack operation is performed. It is preferable to allow the control means to extend and retract the jack.

According to such a configuration, on the track, since the track running wheels project on the track, the jack is extended and contracted only by the automatic jack operation control means. It can be completely stored. On the other hand, on roads and the like, other than on the track, since the track running wheels are stored, it is possible to appropriately select the automatic jack operation control means or the manual jack operation control means to perform the expansion and contraction operation of the jack according to the situation. it can.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows the configuration of a track-and-land vehicle 1 as a track work vehicle provided with the safety device of the present invention. The track-and-land vehicle 1 is configured based on a truck, and can travel on a road by tire wheels 3 for traveling on the road. Further, iron wheels (track running wheels) 4 are rotatably attached to iron wheel support members 4a which are swingably supported by the vehicle body 2 at four positions in front, rear, left and right of the vehicle body 2.

The iron wheel supporting member 4a is oscillated by the expansion / contraction operation of the iron wheel projecting and retracting hydraulic cylinder 5. By oscillating the iron wheel supporting member 4a, the iron wheel 4 can be projected downward. It can be stored above. The track-and-land vehicle 1 places the vehicle body 2 on a rail (track) R for railway with the iron wheel 4 protruding downward, and drives the tire wheel 3 with the tire wheel 3 in contact with the rail R to drive the rail. It is possible to run on R. Instead of such driving of the tire wheel 3, the iron wheel 4 may be directly driven to be able to run on the rail R by itself.

In the center of the lower part of the vehicle body 2, a turntable 6 for mounting the track-and-land vehicle 1 on the rail R for moving is mounted. The turntable 6 is adapted to project downward and support the vehicle body 2 or to be retracted upward, and can be turned horizontally while the vehicle body 2 is supported.

On the vehicle body 2, a revolving base 11 is attached to the vehicle body 2 so as to be freely rotatable, and a boom 1 is mounted on the revolving table 11 so as to be able to move up and down, and is telescopically constructed so as to be telescopic.
An altitude work apparatus 10 is provided which includes a work table 13 for swinging the operator (horizontal rotation) at the tip of the boom 12 so as to freely swing (horizontal rotation).

At four positions on the front, rear, left and right of the vehicle body 2, jacks 15 for supporting the vehicle body 2 during operation are attached. The jack 15 includes an outer post 15a fixed to the vehicle body 2, and an inner post 15b telescopically attached to the outer post 15a. The outer post 15a is not fixed to the vehicle body 2 but is fixed to a lateral end of an outrigger beam slidably mounted on the vehicle body 2 in the left-right direction so that the position in the left-right direction can be changed. Good.

In order to extend and retract the jack 15,
An operation device 21 (see FIG. 1) is provided on the railway vehicle 1. The operating device 21 is used for both manual operation and automatic operation of the expansion and contraction operation of the jack 15, and the selection of the manual operation or the automatic operation is performed by a selection switch (selection means) 22 (see FIG. 1). ) Can be performed by switching.

In the track-and-land vehicle 1 having the above configuration, the jack 1
FIG. 1 shows a configuration of a control device (safety device) that performs operation control such as 5 and the like. An operation signal from the operation device 21 and a selection signal of the selection switch 22 are input to the controller 26. Further, an iron wheel position detector (iron wheel position detecting means) 23 for detecting the overhang position of the iron wheel 4 and a jack 15
A ground reaction force detector 24 for detecting a ground reaction force acting on the controller 2 is also provided.
6 is input.

When a manual operation is selected by switching the selection switch 22, this selection signal is output to the controller 26, and the controller 26 controls the operation device 21 to perform a lever operation toward the extension side for each jack 15. The respective jacks 15 are extended in response to the operation, and the respective jacks 15 are contracted in response to the lever operation to the contraction side.

On the other hand, when the automatic operation is selected, this selection signal is output to the controller 26,
When the lever operation to the automatic extension side is performed by the operation device 21, the extension operation of the front, rear, left and right jacks 15 is started, and the extension operation is performed until the jacks 15 touch the ground and the vehicle body 2 reaches a predetermined support state. After that, the operation is stopped. When the lever is operated to the compression side, the inner post 1
The jack 15 is reduced and operated until the jack 5 is completely stored, with the storage position 5b being the storage position, and then the operation is stopped.

When such an automatic jack operation is performed, the support of the vehicle body 2 by the jack 15 is set to be performed in a state where the ground reaction force acts on the jack 15 but the vehicle body 2 does not float. Based on the information from the ground reaction force detector 24, the controller 26 determines that the ground reaction force acting on each of the front, rear, left and right jacks 15 is equal to or greater than a predetermined ground reaction force that does not cause the vehicle body 2 to float. The extension operation is stopped.

However, in the present control device, when the track-and-land vehicle 1 is on the rail R, only the automatic operation can be performed regardless of the state of the selection switch 22. For this reason, when it is detected from the information from the iron wheel position detector 23 that the iron wheel 4 is overhanging on the rail R, it is determined that the railway vehicle 1 is on the rail R, and the controller 26 determines ,
Regardless of the state of the selection switch 22, the operation of the operation device 21 causes only the above-described auto jack operation to be performed.

On the other hand, when it is detected that the iron wheel 4 is stored, the state of the selection switch 22 is made effective, and when the vehicle is not traveling on the rail R, the selection of the manual operation or the automatic operation is performed by switching the switch. To perform an operation in a desired operation mode.

In the present control device, the ground reaction force detector 2
When it is detected from the information from 4 that a ground reaction force is acting on the jack 15, the travel restricting device 27 is operated so that the jack 15 cannot travel on the road or on the rail R. . Further, when it is detected that the ground reaction force is acting on the jack 15 and the vehicle is to be driven, an alarm operation such as turning on an alarm lamp 28 or sounding an alarm buzzer 29 is performed.

When performing work other than traveling on the rail R, such as construction of electric wires on a road, by using the track-and-land vehicle 1 configured as described above, first, the tire wheels 3 are driven to near the site. Travel on the road to the destination and stop. During traveling on such a road, the iron wheel 4 and the turntable 6 are pulled up and located at the storage position. When the vehicle stops, the operating device 21 is operated to extend the jack 15 so that the jack 15 supports the vehicle body 2. At this time, since the iron wheel 4 is stored and the state of the selection switch 22 is enabled, the jack 15 can be extended by appropriately selecting a manual operation or an automatic operation.

Here, when the vehicle body 2 is supported by the jack 15 by performing the automatic jacking operation, the vehicle body 2 is not lifted up in the supported state and is supported by the jack 15 and the tire wheels 3. In this case, the body 2
Is substantially parallel to the jack contact surface (road surface). Therefore, when the road surface is inclined, a manual operation is performed to extend the jack 15 while keeping the vehicle body 2 horizontal. When the road surface is horizontal, the auto jack operation may be performed.

When the vehicle body 2 is supported by the jack 15, the boom 12 is actuated to move the work table 13 to a desired height, and the worker on the work table 13 performs work at height. Here, while the vehicle body 2 is supported by the jack 15, the ground reaction force acts on the jack 15, so that the travel is restricted. When the work is completed, the jack 15 is stored and the vehicle travels on the road and moves to another place.

On the other hand, when performing construction or inspection of railway equipment such as a trolley wire and a trolley wire on the rail R, first, the tire wheels 3 are driven in the same manner as described above, and the vehicle is driven on the road to near the site. Move. When the vehicle arrives at a railroad crossing near the work site, the vehicle stops across the rail R, and the turntable 6 is extended to operate, thereby supporting the vehicle body 2. Thereafter, the vehicle body 2 is turned horizontally with respect to the turntable 6, the iron wheel 4 is positioned on the rail R, the iron wheel 4 is extended, and the turntable 6 is retracted to put the iron wheel 4 on the rail R. At this time, since the iron wheel 4 is extended, regardless of the state of the selection switch 22, only the automatic operation can be performed for the expansion and contraction operation of the jack 15.

When the iron wheel 4 is mounted on the rail R, the rail R
Travel on the top to move to the destination and stop,
Is operated to extend the jack 15, and the jack 15 is extended.
Causes the vehicle body 2 to be supported. At this time, since the track-and-land vehicle 1 is on the rail R and only the automatic operation is performed, when the operating device 21 is operated to the lever side, the jack 15 is automatically extended and the ground 15 is grounded. I support. In a state where the vehicle body 2 is supported by the jack 15 in this manner, the high-altitude work is similarly performed by the high-altitude work device 10.

Here, in this case, the vehicle body 2 is supported by the jack 15 by operating the auto jack, so that the vehicle body 2 does not float in the supported state and the load of the vehicle body 2 remains on the rail R via the iron wheel 4. The vehicle body 2 is supported by the jack 15 and the iron wheel 4. For this reason, the vehicle body 2 is substantially parallel to the rail R, but since the rail R is hardly inclined, the posture of the vehicle body 2 does not become greatly inclined and the work can be performed stably. . In this case as well, while the support is being performed by the jack 15, the travel regulation is performed in the same manner as described above.

When the operation is completed, the jack 15 is contracted by operating the operating device 21, and the jack 15 is contracted until the inner post 15b is located at the stowed position to be in the stowed state. Also in this case, the track-land vehicle 1 is on the rail R and only the automatic operation is performed.
When the operating device 21 is operated to the retracted side, the jack 15
Is automatically retracted to a completely retracted state. In addition, since the iron wheel 4 does not rise from the rail R in the support state, the iron wheel 4 can be mounted on the rail R without removing when the jack 15 is reduced at the end of the work. Then, when the jack 15 is stored,
The vehicle travels on the rail R and moves up to the level crossing.

Here, when the track-and-land vehicle 1 is on the rail R, only the automatic operation can be performed regardless of the state of the selection switch 22, so that when the ground reaction force is not acting on the jack 15, the jack 15 is completely stored. On the other hand, when the ground reaction force is acting on the jack 15, the traveling is restricted,
Traveling is performed only in a state where no ground reaction force acts on the jack 15. Therefore, when traveling on the rail, the jack 15 can always be completely stored.

After traveling on the rail R and moving up to the railroad crossing, the vehicle again travels on the road by the tire wheels 3 from there.

While the jack 15 is in the completely retracted state when traveling on the rails, the jack 15 may be extended for some reason during traveling and may not be completely retracted. It can happen. For this reason, a detector is provided for directly detecting whether or not the jack 15 is completely retracted, so that traveling is restricted when it is detected that the jack 15 is not completely retracted when traveling on rails. You can also.

As described above, the case where the safety device of the present invention is provided on a railway vehicle capable of traveling on both the rail R and the road has been described. However, the safety device of the present invention is not limited to such a railway vehicle. The present invention can also be applied to a track work vehicle that can travel only on the rail R.

[0036]

As described above, according to the track work vehicle safety device of the present invention, the operation of the jack is controlled by the automatic jack operation control means. Is set to the fully retracted position, and furthermore, the track work vehicle is configured to be permitted to run only when the ground reaction force acting on the jack is zero. It can be completely stored. Therefore, it is possible to prevent a situation in which the lower end of the jack comes into contact with the sleeper under the track when running on the track.

According to such a configuration, it is possible to determine whether or not the jack is in the completely retracted state based on whether or not the ground reaction force is acting. Therefore, it is determined whether or not the jack is completely retracted. There is an advantage that it is not necessary to separately provide a detecting means for detecting.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of a safety device for a track work vehicle according to the present invention.

FIG. 2 is a side view showing a configuration of a railway land vehicle provided with the safety device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 track land vehicle (track work vehicle) 2 body 3 tire wheel (road running wheel) 4 iron wheel (track running wheel) 15 jack 21 operating device 22 selection switch (selection means) 23 iron wheel position detector (iron wheel position detection means) 24 Ground reaction force detector 26 Controller 27 Travel restriction device R rail (track)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsutomu Takeda 414-1 Higashimine Sugawa, Aiji Corp. 414-1 Aichi Corporation Shinji Works

Claims (2)

[Claims] 1. A track running wheel, and a jack extending downward from a completely retracted position to lift and support a vehicle body, wherein the jack is stored and the track runs using the track running wheel during track running. The jack is extended downward from the completely retracted position, the lower end is grounded, and the jack is extended to a vehicle body supporting position where a predetermined ground reaction force is applied. An automatic jack operation control means for automatically performing a contraction operation from the vehicle body support position to the complete storage position by performing a contraction operation upwardly; and a ground reaction force for detecting a ground reaction force acting on the jack. Detecting means, and permitting the track work vehicle to travel on the track only when the ground reaction force acting on the jack detected by the ground reaction force detecting means is zero. A safety device for a railroad working vehicle, comprising: a travel restricting means. 2. The track working vehicle includes a road running wheel in addition to the track running wheel, stores the track running wheel during running on the road, and runs using the road running wheel. Sometimes comprising a track-and-land vehicle configured to run by running the track running wheels on the track, and in addition to the automatic jack operation control means, a manual jack operation control means for performing the expansion and contraction operation of the jack by manual operation; Selecting means for switching between the automatic jack operation control means and the manual jack operation control means; an iron wheel position detecting means for detecting a projecting position of the track running wheel; and information from the iron wheel position detecting means, When it is detected that the track running wheel is overhanging on the track, regardless of the switching state of the selecting means, Only the expansion and contraction operation of the jack by the auto jack operation control means is enabled, and when it is detected that the track running wheels are stored, the switching state of the selection means is enabled, and the selected jack operation control means The safety device for a track work vehicle according to claim 1, further comprising selection control means for enabling the jack to extend and retract.