JP2002234699A - Working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the extension working efficiency of a jack. SOLUTION: This high-lift working vehicle 1 comprises front wheels 5 and rear wheels 7 arranged at the front and rear sides of a body 3, outrigger jacks 30 arranged at the front and rear sides of the body 3, a swivel base 11 formed on the body in a horizontally swung manner, a boom 13 pivotally connected at its base to the swivel base 11 and formed to perform derricking motion with a derricking cylinder 15, and a working bucket 17 mounted at the end of the boom 13. An upper jack operating device 23 is arranged on the working bucket 17 for operating the drive of the outrigger jack 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle, and more particularly, to a workable vehicle, a work device provided on the vehicle and having a work table for performing a predetermined work, and a vehicle supporter. Jacks attached to both the left and right ends of the vehicle, and a jack operating device that operates the drive of the jack,
The present invention relates to a work vehicle having a jack operation control device that controls the operation of a jack according to the operation of a jack operation device.

[0002]

2. Description of the Related Art An aerial work vehicle for performing aerial work includes road running wheels disposed in front and rear of a vehicle body, jacks disposed in front and rear of the vehicle body to support the vehicle body, and disposed on the vehicle body. A work device having a work table for performing a predetermined work, a jack operation device for operating the jack drive, and a jack operation control device for controlling the operation of the jack in accordance with the operation of the jack operation device; There are things that are.

[0003] Further, a track-and-land working vehicle, which is an example of a track-and-land vehicle, includes a road running wheel disposed in front and rear of the vehicle body, a track running iron wheel disposed in front and rear of the vehicle body, and a front and rear vehicle body. A jack for supporting the vehicle body, a working device arranged on the vehicle body and having a worktable for performing a predetermined work, a jack operating device for operating the jack drive, and operating the jack in accordance with the operation of the jack operating device. And a jack operation control device for controlling the operation.

[0004]

However, in the case of an aerial work vehicle and a track-and-land work vehicle, when a jack is to be extended while a worker is on a workbench, a jack operating device is provided at a lower portion of the vehicle. Therefore, the worker on the work table must move the work table to the lower part of the vehicle and then descend to the lower part of the vehicle, move to the jack operating device, and store the jack. As a result, the worker needs to move from the work table to the jack operating device, which reduces the work efficiency of the jack extension work and the entire work.

[0005] Further, if the vehicle is moved to another work site in a state where the jack is not completely stored in the vehicle, the jack may collide with an obstacle or track equipment, and may damage them. Problems arise.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and improves the work efficiency of jack overhanging work and the whole work, and there is no possibility that the jack collides with an obstacle or track equipment. It is an object to provide a working vehicle.

[0007]

In order to solve the above-mentioned problems, a working vehicle according to the present invention has a workable vehicle (for example, a vehicle body 3 in the embodiment) and a work table provided on the vehicle. (For example, the booms 13 and 87 in the embodiment) for performing predetermined work, jacks (for example, the outrigger jack 30 in the embodiment) attached to both left and right ends of the vehicle to support the vehicle, and driving of the jack (For example, the upper jack operating device 23 and the lower jack operating device 25 in the embodiment), and a jack operation control device (for example, in the embodiment) that controls the operation of the jack in accordance with the operation of the jack operating device. (For example, the aerial work vehicle 1 and the track-and-ground work vehicle 80 in the embodiment) having the jack operation control circuit 61). I am. Here, the jack operating device is provided at least on the worktable.

According to the work vehicle having the above-described structure, the jack operating device can be operated from the work table. This eliminates the need for the worker on the workbench to move to the lower part of the vehicle to operate the jack, as compared with the conventional case where the jack operating device is provided only at the lower part of the vehicle, and the jacking operation and the entire work Efficiency can be improved.

Further, in the working vehicle having the above-described structure, the jack is configured to be able to protrude and be stored in the vehicle, and jack storage detecting means for detecting whether or not the jack is stored in the vehicle (for example, the jack storage sensor in the embodiment). 51) and travel restricting means (for example, an operation restricting circuit 73 in the embodiment) for restricting the travel of the vehicle when the jack is detected by the jack storage detecting means as being in the non-storage state in the vehicle. You may comprise.

According to the working vehicle having the above-described structure, when the jack storage detecting means detects that the jack is not stored in the vehicle, the travel restricting means restricts the traveling of the vehicle by the traveling means. As a result, the vehicle does not run with the jack protruding outward from the vehicle,
The possibility that the jack collides with an obstacle or track equipment can be prevented beforehand.

Further, in the working vehicle having the above configuration, the traveling state determining means (for example, the traveling determining circuit 69 in the embodiment) for determining whether or not the vehicle is in the traveling state, and the vehicle travels by the traveling state determining means. A jack extension restricting means (for example, the operation regulation circuit 73 in the embodiment) for regulating the jack extension operation when it is determined to be in the state may be provided.

According to the working vehicle having the above structure, when the traveling state determination means determines that the vehicle is in the traveling state, the jack extension restricting means regulates the jack extension operation. As a result, the vehicle does not travel with the jack protruding outward from the vehicle, and the possibility that the jack collides with an obstacle, track equipment, or the like can be prevented.

In the working vehicle having the above-described structure, a jack storage control means (for example, in the embodiment, which allows and restricts the jack storage operation by the jack operating device in consideration of the overturning moment acting on the vehicle and the allowable overturning moment). An operation restriction circuit 73) may be provided.

According to the working vehicle having the above-described structure, the jack storage control means allows and restricts the operation of storing the jack by the jack operating device in consideration of the overturning moment acting on the vehicle and the allowable overturning moment. When the worker on the platform operates the jack operating device provided on the platform and retracts the jack, the worker on the platform will not be able to determine the magnitude of the overturning moment acting on the vehicle. I do not know if there is. For this reason, if the jack is stored in spite of the large moment in the overturning direction, the possibility of the vehicle overturning increases. Therefore,
When the operator performs the stowage operation of the jack with the jack operating device, the overturning moment is smaller than the allowable overturning moment, or the position of the worktable is within the range in which the worktable can move without exceeding the allowable overturning moment. When it is within the allowable working range, the jack storage control means allows the jack to be stored, and when the overturning moment exceeds the allowable overturning moment, or when the position of the worktable exceeds the allowable working range, Jack storage control means regulates storage of the jack. As a result, the jack can be stored in a stable state of the vehicle.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS. The present embodiment is capable of traveling with front and rear wheels (wheels for road traveling), and has an outrigger jack (jack) before and after the vehicle.
When traveling on rails, the vehicle can be driven by abutting the front wheels, rear wheels and iron wheels (wheels for track travel) for road travel on the rails, and jacks are provided before and after the vehicle. 1 shows an aspect of a track-and-ground work vehicle having the same.

[0016]

First Embodiment First, a first embodiment according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the aerial work vehicle 1 has a pair of front wheels 5 configured to be steerable on the left and right sides on the front side of the vehicle body 3, and travels on the left and right sides on the rear side of the vehicle body 3. The vehicle can travel with a pair of rear wheels 7 connected to a motor M, and the front wheels 5 and the rear wheels 7
Is configured to be brakeable. Outrigger jacks 30 are mounted on both left and right sides of the front side of the front wheel 5 and the rear side of the rear wheel 7 to protrude outward to lift and support the vehicle body 3. A turntable 11 configured to be horizontally turnable is disposed on an upper part of the vehicle body 3, and a boom (working device) 13 is mounted on the turntable 11. This boom 1
3 is configured to be moved up and down by an up / down cylinder 15. The boom 13 is configured to be telescopically movable by a built-in telescopic cylinder (not shown) in which three boom members are nested. At the tip of the boom 13, a work table 17 is attached.
An upper boom operating device 19 for operating the driving of the vehicle, a traveling operating device 21 for driving the traveling motor M to drive the vehicle and steering the front wheels 5, and an outrigger jack 30
Upper jack operating device 2 for operating overhang and storage
3 is attached. A lower jack operating device 25 having the same function as the upper jack operating device 23 and a lower boom operating device 27 having the same function as the upper boom operating device 19 are provided on the side of the vehicle body 3 between the front wheel 5 and the rear wheel 7. Is attached.

As shown in FIG. 2, the outrigger jack 30 is provided with an outrigger beam 31 provided so as to be able to protrude in the left-right direction of the vehicle body 3, and an outrigger beam 31 provided in the outrigger beam 31 to move the outrigger beam 31 in the left-right direction of the vehicle body 3. A beam cylinder 33 projecting into the outer cylinder, an outer post 35 vertically attached to a tip of the outrigger beam 31,
An inner post 37 inserted into the outer post 35 so as to be able to expand and contract freely; a jack cylinder 39 provided in the outer post 35 and the inner post 37 for vertically projecting the inner post 37 into the outer post 35; A ground plate 40 is swingably attached to the lower end of the post 37. The upper end of the jack cylinder 39 is pivotally connected to a support shaft 43 inserted through an oblong hole 41 provided at the upper end of the outer post 35, and the lower end of the jack cylinder 39 is pivotally connected to the inside of the lower end of the inner post 37. Have been. A horizontal member 45 extending in the horizontal direction is attached to an intermediate portion in the width direction of the support shaft 43, and a limit switch 47 is attached to the inside of the upper end of the outer post 35. When the support shaft 43 moves upward and the upper end of the support shaft 43 contacts the upper end of the oblong hole 41, the horizontal member 45 contacts the limit switch 47 and the limit switch 47 is attached. It is installed at a position where it can be turned ON.

Next, the control device 50 for controlling the running of the vehicle and the operation of the outrigger jack 30 will be described.
As shown in FIG. 3, the control device 50 includes an upper jack operating device 23, a lower jack operating device 25, a jack storage sensor 51, a worktable position sensor 53,
7, the traveling operation device 21 and the controller 60 are configured. Since the upper jack operating device 23, the lower jack operating device 25, the limit switch 47, and the travel operating device 21 have been described above, the description thereof will be omitted. The jack storage sensor 51 moves the outrigger beam 31 of the outrigger jack 30 shown in FIG. 2 to the inside of the vehicle body 3 and the inner post 37 is housed in the outer post 35, and the outrigger jack 30 is It detects whether or not it is in the stored state. Workbench position sensor 5
Reference numeral 3 has a function of detecting the amount of extension of the boom 13, the turning angle, and the undulating angle in order to detect the three-dimensional position of the worktable 17 with respect to the vehicle body 3 shown in FIG. Controller 6
Numeral 0 controls the operation of the outrigger jack 30 shown in FIG. 1 and has a function of controlling the rotation of the traveling motor M. The jack operation control circuit 61, the jack operation determination circuit 63, the storage determination circuit 65, the work platform position determination It is configured to include a circuit 67, a traveling determination circuit 69, a traveling operation control circuit 71, and an operation regulating circuit 73.

The jack operation control circuit 61 controls the operation of the jack operation control valves V1 and V2 for controlling the operation of the jack cylinder 39 and the beam cylinder 33 in accordance with the operation of the upper jack operating device 23 and the lower jack operating device 25. Having. Jack operation determination circuit 6
Reference numeral 3 has a function of determining whether the operation content of the upper jack operating device 23 and the lower jack operating device 25 is an extension operation of the outrigger jack 30 or a storage operation. The storage determination circuit 65 has a function of determining whether or not all four outrigger jacks 30 shown in FIG. 1 are stored in the vehicle body 3 according to the detection information of the jack storage sensor 51.

The workbench position determining circuit 67 calculates the workbench 1 shown in FIG.
7 has a function of calculating the three-dimensional position and determining whether or not the calculated position of the worktable 17 is within an allowable range. Here, when the outrigger jack 30 shown in FIG. 1 is retracted from the extended state, the allowable range is a moment in the overturning direction acting on the vehicle body 3 depending on the position of the work table 17 (hereinafter, this moment is referred to as “overturning”). Directional moment "
It is written. ) Means a range of movement of the work table 17 in which the outrigger jack 30 can be moved when the outrigger jack 30 is retracted without exceeding the allowable overturning moment value. It should be noted that a moment detection sensor (not shown) for detecting the overturning moment acting on the vehicle body 3 can be provided instead of the worktable position sensor 53. In this case, a moment determination circuit (not shown) is provided in place of the worktable position determination circuit 67, and the moment determination circuit determines whether the detection value detected by the moment detection sensor exceeds the allowable overturning moment value. It is configured to determine.

The traveling judgment circuit 69 has a function of judging whether or not the operation of driving the traveling motor M by the traveling operation device 21 is being performed. The traveling operation control circuit 71 operates the traveling motor M according to the operation of the traveling operation device 21.
Has a function of controlling the operation of the travel operation control valve V3 for controlling the operation of the vehicle. The operation restriction circuit 73 restricts the outrigger jack 30 shown in FIG. 2 from extending when the operation of driving the traveling motor M is being performed by the traveling operation device 21.
When the position of the work table 17 shown in FIG. 1 is out of the permissible range, the operation of retracting the outrigger jack 30 is restricted. Has the function of restricting the extension movement of the jack cylinder 39 when the jack cylinder 39 extends and the limit switch 47 is turned ON. The operation control circuit 73 is electrically connected to jack operation control valves V1, V2 and a traveling operation control valve V3.

Next, with respect to the operation of the aerial work vehicle 1 according to the present invention, a case where the upper jack operating device 23 is operated to extend and retract the outrigger jack 30 will be described. First, a case where the aerial work vehicle 1 is moved to the work site before the outrigger jack 30 is extended and stored will be described. As shown in FIG. 1, in a state where the outrigger jack 30 is stored in the vehicle body 3,
An operator (not shown) operates the lower boom operating device 27 to lower and lower the boom 13 and lower the work table 17 to a position near the ground J. At this time, the boom 13 is in a fully contracted state. The operator gets on the workbench 17 which has descended to the vicinity of the ground J and operates the upper boom operating device 19 to operate the boom 13.
Is raised and stopped at a position where a predetermined undulation angle is obtained. Then, the travel operation device 21 is operated to move the aerial work vehicle 1 to the work site. When the traveling operation device 21 is operated, as shown in FIG. 3, the traveling operation control circuit 71 controls the operation of the traveling operation control valve V3 in response to the operation of the traveling operation device 21 to move the traveling motor M in a desired direction. Rotate to. As a result, as shown in FIG. 1, the rear wheel 7 is driven to rotate, and the vehicle moves toward the work site.

Here, if the operator erroneously operates the upper jack operating device 23 to extend the outrigger jack 30 while the operation of driving the vehicle is being performed by the travel operating device 21, the operation is performed. As shown in FIG. 3, the operation restriction circuit 73 determines that the operation of driving the vehicle has been performed by the traveling determination circuit 69 and that the jacking operation determination circuit 63 has extended the outrigger jack 30. Is received. as a result,
The operation restriction circuit 73 is activated and the jack operation control circuit 61
The transmission of the jack extension operation control signal output from the controller to the jack operation control valves V1 and V2 is interrupted, and the extension movement of the jack cylinder 39 and the beam cylinder 33 is restricted.
Therefore, when the vehicle is in a running state, the extension of the outrigger jack 30 is restricted, so that the outrigger jack 30 can be prevented from colliding with an obstacle or the like.

Therefore, it is assumed that the outrigger jack 30 is stored when the vehicle is moved or when the vehicle is running. On the other hand, when the vehicle is stopped and the outrigger jack 30 is not in the stowed state, the jack storage sensor 51 detects the non-stowed state, and the storage determination circuit 65 determines that the outrigger jack 30 is in the non-stowed state. You. When the vehicle travels in this state, the traveling determination circuit 69 determines that the vehicle is in a traveling state, and as a result, the activation regulating circuit 73 is activated and the traveling operation control signal sent from the traveling operation control circuit 71 is activated. The transmission to the control valve V3 is cut off. That is, traveling of the vehicle is restricted when the outrigger jack 30 is not stored. For this reason, the operator must use the outrigger jack 30.
, The storage operation of the outrigger jack 30 is reliably performed before the vehicle travels.

Next, a case where the outrigger jack 30 is extended at the work site will be described. Figure 1
As shown in, when the vehicle travels and arrives at the work site,
An operator (not shown) on the workbench 17 operates the traveling operation device 21 to stop driving the traveling motor M, and also puts the front wheels 5 and the rear wheels 7 in a braking state to start the vehicle. Stop. When the vehicle stops, the operator operates the upper jack operating device 23 to move the outrigger jack 30.
Overhang operation. Here, the worker operates the traveling operation device 2
Since the traveling operation for causing the vehicle to travel according to No. 1 is not performed, as shown in FIG. 3, the traveling determination circuit 69 determines that the vehicle is in the non-traveling state. As a result, even when the outrigger jack 30 is extended, the operation restricting circuit 73 does not operate, and the extended operation control signal output from the jack operation control circuit 61 in accordance with the upper jack operating device 23 is used as the jack operation control signal. The signals are transmitted to the valves V1 and V2 as they are, and the jack cylinder 39 and the beam cylinder 33 are extended and the outrigger jack 30 shown in FIG. 1 is extended.

Then, as shown in FIG. 2, the outrigger beam 31 extends outward, the inner post 37 projects downward with respect to the outer post 35, and the ground plate 40 comes into contact with the ground J. When the jack cylinder 39 further extends, the jack cylinder 39 extends upward due to the ground reaction force from the ground J, and the support shaft 43
Moves upward in the oblong hole 41. In addition, the horizontal member 45 moves upward with the movement of the support shaft 43 and contacts the limit switch 47, and the limit switch 47 outputs an ON signal.

This ON signal is sent to the operation restricting circuit 73 to operate the operation restricting circuit 73, as shown in FIG.
As a result, transmission of the overhang operation control signal output from the jack operation control circuit 61 to the jack operation control valve V1 is cut off. As shown in FIG. 2, the extension movement of the jack cylinder 39 is restricted and the support shaft 43 is held in contact with the upper part of the oblong hole 41, and the front wheel 5 and the rear wheel 7 shown in FIG. It is kept in contact with J. Here, most of the vehicle weight acts on the front wheels 5 and the rear wheels 7, and only a small amount acts on the jack cylinder 39 shown in FIG. 2, that is, the jack cylinder 39 is maintained in the initial contact state.
For this reason, even if the vehicle is mounted on the inclined ground J, the front wheels 5 and the rear wheels 7 in the braking state are in contact with the ground J, so that the vehicle does not move and the runaway of the vehicle is prevented. Can be prevented.

Conventionally, as shown in FIG. 1, in order to overhang the outrigger jack 30 after the vehicle arrives at the work site, an operator on the work table 17 operates the lower jack operating device 25. I had to. For this reason, the worker must move to the position where the lower jack operating device 25 is located by moving the work table 17 or the like,
This has reduced the work efficiency of the outrigger jack 30 overhang work and the entire work. However, in the aerial work vehicle 1 shown in FIG. 1, since the upper jack operation device 23 is provided on the work table 17, the worker on the work table 17 needs to move to the lower jack operation device 25. The outrigger jack 30 can be extended by operating the upper jack operating device 23. As a result, it is possible to improve the jack overhang work and the work efficiency of the entire work.

Next, the storing operation of the outrigger jack 30 will be described. When the worker on the work table 17 finishes the desired work and needs to move the vehicle to another place or the like, the worker operates the upper boom operating device 19 to turn the swivel table 11. Then, the boom 13 is moved down and down, and the boom 13 is moved to the storage position. Here, when the storage operation of the jack 30 is performed by operating the upper jack operating device 23 in a state where the boom 13 is shifted from the storage position, as shown in FIG. 3, the work table position sensor 53 detects the work. The workbench position determination circuit 67 determines that the position of the workbench 17 shown in FIG. 1 is beyond the allowable range, the operation restriction circuit 73 is operated, and the jack operation of the storage operation control signal sent from the jack operation control circuit 61 is performed. The transmission to the control valves V1 and V2 is cut off. As a result, the storage operation of the outrigger jack 30 shown in FIG. 1 is restricted, and the worker notices that the position of the boom 13 shown in FIG. 1 is not at the storage position, and the storage operation of the boom 13 is performed reliably. .

When the workbench position determining circuit 67 determines that the position of the workbench 17 shown in FIG. 1 detected by the workbench position sensor 53 is within the allowable range, the operation restricting circuit 7
3 does not operate, and the jack operation control valves V1, V2 of the storage operation control signal sent from the jack operation control circuit 61 are not operated.
Transmission to As a result, jack cylinder 3
9 and the beam cylinder 33 are contracted and the outrigger jack 30 shown in FIG. 1 is stored. As a result, the outrigger jack 30 can be stored in a stable state of the vehicle.

[0031]

Second Embodiment Next, a second embodiment according to the present invention will be described with reference to FIGS. In the second embodiment, only differences from the first embodiment will be described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted. Track-and-work vehicle 80
As shown in FIG. 4, the vehicle is configured based on a truck running on a road, has a driving cabin 82 on the front side of a vehicle body 81, and rotates a pair of front wheels 83 on both lower sides of the driving cabin 82. It has a pair of rear wheels 84 rotatably on both sides of the rear part of the vehicle body. The rear wheel 84 is a driving wheel that is driven to rotate by receiving a driving force of an engine (not shown).

Both sides of the front of the vehicle body behind the driving cabin 82 and the body 81 behind the rear wheel 84
An outrigger jack 30 for lifting and supporting the vehicle body 81 is attached to both sides of the vehicle body 81. A center jack 85 for lifting and supporting the rail and land vehicle 80 itself is attached to a substantially central lower portion of the vehicle body 81. A turntable 86 configured to be horizontally turnable is attached to a front upper portion of the vehicle body 81, and a boom 87 that has a base end pivotally connected thereto and that can expand and contract is attached to the upper portion of the turntable 86. 8
Numeral 7 is configured to be raised and lowered by a lifting cylinder 88. At the tip of the boom 87, a worktable 17 on which a worker can ride is attached.

A track traveling device 90 used for traveling the vehicle on the rail R is attached to both sides of the vehicle body on the front side and the rear side of the vehicle. The track running device 90 includes a support frame 89 projecting downward from a lower portion on both sides of the vehicle body.
Attached to. An iron wheel holding frame 91 is pivotally connected to the lower part of the support frame 89 so as to be vertically swingable. A lifting cylinder 92 is connected between the support frame 89 and the iron wheel holding frame 91. An iron wheel 93 is rotatably attached to the tip of the iron wheel holding frame 91. Iron wheel 9
Reference numeral 3 denotes an annular flange portion 93 projecting inward and radially outward.
a. When the elevating cylinder 92 expands and contracts, the iron wheel 93 moves to the retracted position and the extended position.

According to the rail-operated working vehicle 80 having the above configuration, the front wheel 83 and the rear wheel 84 are grounded on the rail R, and the iron wheel 93
Is in contact with the rail R, and the outrigger jack 3
When the overhanging work and the storing work are performed,
Since the upper jack operating device 23 is disposed on the work table 17 as in the aerial work vehicle 1 shown in FIG.
The extension operation of the outrigger jack 30 can be performed from the work table 17 without operating the lower jack operation device 25. The overhanging work of the outrigger jack 30 conforms to the case of the aerial work vehicle 1 described above, and a description thereof will be omitted.
As a result, it is possible to improve the jack overhang work and the work efficiency of the entire work.

When the vehicle is in a running state, the operation of extending the outrigger jack 30 is restricted. When the outrigger jack 30 is in the non-retracted state, the traveling of the vehicle is restricted, and when the position of the work table 17 is within an allowable range. Only the storage operation of the outrigger jack 30 is allowed, so that it is possible to prevent the outrigger jack 30 from colliding with the track equipment and damaging the track equipment beforehand, and the storing operation of the outrigger jack 30 is stabilized. It can be done in a state. In addition, regarding the jack extension operation regulation when the vehicle is in the traveling state, the vehicle traveling regulation when the outrigger jack 30 is in the non-retracted state, and the jack retracting operation when the position of the work table 17 is within the allowable range,
The description is omitted because it conforms to the case of the aerial work vehicle 1 described above.

Further, in the overhanging operation of the outrigger jack 30, when most of the vehicle weight acts on the front wheel 83 and the rear wheel 84 and the jack cylinder 39 is brought into an initial contact state in which only a small weight acts, the jack cylinder 39 5 is restricted, even if the outrigger jack 30 is retracted in a state where vibration is generated by the work, FIG.
As shown in the figure, since the iron wheel 93 abuts on the rail R and the flange portion 93a is located inside the rail R, the vehicle does not deviate from the rail R, and the derailment of the vehicle can be prevented beforehand. it can.

[0037]

As described above, according to the working vehicle of the present invention, at least the working table is provided with a jack operating device for operating the jacks attached to the left and right ends of the vehicle to support the vehicle. In this way, the jack operating device can be operated from the work table, and compared to the conventional case where the jack operating device was provided only at the lower part of the vehicle, the worker boarding the work table can be operated at the lower part of the vehicle for jack operation. There is no need to move, and the work efficiency of jacking work and the whole work can be improved.

[Brief description of the drawings]

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

FIG. 2 is a front view of the outrigger jack according to the first embodiment of the present invention.

FIG. 3 shows a block diagram of a control device according to the first embodiment of the present invention.

FIG. 4 shows a side view of a track-and-ground work vehicle according to a second embodiment of the present invention.

FIG. 5 shows a front view of an outrigger jack according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Height working vehicle (working vehicle) 3, 81 Body (vehicle) 13, 87 Boom (working device) 17 Workbench 23 Upper jack operating device (jack operating device) 25 Lower jack operating device (jack operating device) 30 Outrigger Jack (jack) 51 jack storage sensor (jack storage detection means) 61 jack operation control circuit (jack operation control device) 69 travel determination circuit (travel state determination means) 73 operation restriction circuit (travel restriction means, jack extension restriction means, Jack storage control means) 80-rail land vehicle (work vehicle)

Continued on the front page (72) Inventor: Satoshi Sasaki, 1152, Yamashita, Ryoji, Oji, Ageo City, Saitama Prefecture Inside Aichi Corporation Ageo Works (72) Inventor, Katsutoshi Aoi 10 shares at 1152, Ryoke, Ryoke, Yamato, Ageo, Saitama Aichi Corporation Ageo Factory (72) Inventor Atsushi Kubo 1152 Yamashita, Ryoke, Oji-shi, Saitama F-term (reference) 3F333 AA08 AB04 BA12 BD02 CA15 CA21 DA02 DB10 FA09 FA34 FD20

Claims (4)

[Claims] 1. A workable vehicle, a work device disposed on the vehicle and having a worktable for performing a predetermined work, and jacks attached to left and right ends of the vehicle to support the vehicle. A jack operating device that controls the driving of the jack, and a jack operation control device that controls the operation of the jack in accordance with the operation of the jack operating device, wherein the jack operating device; Is provided on at least the work table. 2. The jack is configured to be able to protrude and be stored in the vehicle, a jack storage detecting means for detecting whether or not the jack is stored in the vehicle, and the jack being detected by the jack storage detecting means so that the jack is mounted on the vehicle. 2. The work vehicle according to claim 1, further comprising a travel restricting means for restricting the travel of the vehicle when it is detected that the vehicle is not stored. 3. The vehicle according to claim 1, further comprising: a traveling state determination unit configured to determine whether the vehicle is in a traveling state. When the traveling state determination unit determines that the traveling unit is in the traveling state, the jack of the jack is driven. The work vehicle according to claim 2, further comprising a jack extension restricting means for restricting the extension operation. 4. A jack storage control means for permitting and restricting the jack storage operation of the jack by the jack operating device in consideration of the overturning moment and the allowable overturning moment acting on the vehicle. The work vehicle according to any one of claims 1 to 3, wherein: