JP2002326800A - Running regulating device of vehicle for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a vehicle from running with the sub boom of a lifter projected outward in vehicles for high lift work including those of an insulated type having a lifter. SOLUTION: The lifter comprises a stored state detector 22 for detecting the stored state of the sub boom. When a controller 81 judges by the detection that the sub boom 63 is not stored, above problem is solved by fixing wheels 3, by preventing jacks 6 from being stored, by stopping a drive source such as an engine, by cutting a power take-off PTO, or by emitting an alarm for regulating the running of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to traveling safety of an aerial work vehicle, and more particularly, to a travel restricting device for an aerial work vehicle having a lifting device near a work table.

[0002]

2. Description of the Related Art For aerial work vehicles in which a work table is arranged at a desired height by rotating, booming, and expanding and contracting a boom, a lifting device is provided near the work table for convenience of work. What has been established is known. Generally, in aerial work vehicles, the boom's swiveling movement, up-and-down movement, and expansion and contraction movement are performed by actuators such as a swing motor, an up-and-down cylinder, and an expansion and contraction cylinder that operate with hydraulic pressure. There are provided an operating device that operates by raising and lowering the lever and an operating device that converts displacement of the operating lever into an electric signal or the like and indirectly operates by electromagnetic driving or the like. There are provided two operating devices, an operating device operated by a worker on a workbench (this is referred to as an upper operating device) and an operating device operated by a worker near the ground (referred to as a lower operating device). ing.

[0003] Some high-altitude work vehicles are used for electric work such as relocation of electric poles and replacement of pole transformers and switches. In such an aerial work vehicle for electric construction work, a boom extending toward the vicinity of an overhead electric wire or a boom (a sub-boom or a winch arm) of a hoisting device for raising and lowering and turning near the worktable is used.
Or mistakenly attach a winch rope etc. to an overhead electric wire (hot wire).
Some are configured so as not to cause an electric shock or damage to the vehicle by a worker on the work table even when the contact is made. As such a safety structure, a boom (a part of a boom such as a tip boom in the case of a multi-stage boom) and a winch rope are formed by using an electrically insulating material, and an electric current is passed through the boom, the winch rope and the like. An apparatus configuration that does not drop is adopted. An aerial work vehicle having such a configuration is referred to as an insulated aerial work vehicle.

[0004] In such an insulated high-altitude work vehicle, in order to maintain electrical insulation between the work table and the vehicle body, the electric signal of the upper operation device cannot be transmitted directly to the vehicle body by electric wires.
For this reason, in an insulated aerial work platform, the operation command is transmitted by an electrically insulated hydraulic hose or hydraulic oil, or the electrical signal of the operation command is once converted into an optical signal by performing a photoelectric conversion to improve the electrical insulation. The signal is transmitted through the optical fiber and returned to an electrical signal for operation control.

[0005] Since the vicinity of the workbench of the insulated aerial work platform is electrically isolated from the vehicle body side, for example, when an electrically driven lifting device is provided, an electric signal or various sensors for operating the operation lever are provided. Even when the operation control is performed using the electric signal, the power for the operation control cannot be supplied from the vehicle body. For this reason, an insulated aerial work vehicle is provided with a battery for supplying power to the upper part thereof near the workbench.

However, it is also difficult to provide a generator on the upper side (workbench side), and it is necessary to constantly monitor the state of charge of the upper battery, which makes the maintenance of the apparatus complicated. For example, once the battery goes down, the work must be interrupted and charged, or the battery itself must be replaced, resulting in reduced work efficiency. For this reason, the power supply of the upper control device is turned off when waiting for an instruction that is not actually performing a driving operation or the like in order to work at a high place for as long as possible.
Some devices are configured to prevent the battery from running out by using an upper power saving device that is set to F.

On the other hand, when working with an aerial work vehicle, in order to stably support the vehicle, the lower ends of a plurality of jacks provided on both right and left sides of the vehicle body are brought into contact with the ground to lift and support the vehicle body. I do. These jacks are operated by an operator operating a jack control / operation device provided on a vehicle body. Here, when the aerial work vehicle is moved after the work is completed, if the jack is raised and the vehicle is run in a state where the boom is not stored, there is a problem in running stability and safety. For this reason, a travel restricting device (also referred to as a jack interlock device) that restricts the storage of the jack unless the boom is in a predetermined storage state is attached as a safety device.

A lifting device is often provided in the vicinity of a workbench in the aerial work vehicle as described above. The lifting device includes a sub-boom and a holding device, and the sub-boom is held by a holding device having a base end attached to an upper end of a vertical post. The holding device is configured to be able to pivot the sub-boom and swing up and down, and a winch mechanism is provided above the holding device. The tip of the rope wound around the winch mechanism is hung around a sheave pivotally connected to the tip of the sub-boom and is hung.

This lifting device is configured to be removably attached to the holding device, and the sub-boom is detached and accommodated when the lifting device is not used or when the operation is completed. However, it is troublesome to attach and detach the sub-boom every time, and the working efficiency is reduced. Therefore, it has been proposed to configure the sub-boom so that it can be freely raised and lowered near the work table.

[0010]

However, this type of lifting device is provided with a sub-boom at least to be able to move up and down and to rotate freely. If this happens, there is a problem that the height of the vehicle above the ground becomes too high, which is not preferable from the viewpoint of running safety and stability of the vehicle.

In view of the above, the present applicant considered providing a sensor for detecting storage of the sub-boom so as to detect storage of the sub-boom. However, in the case of an insulated aerial work platform, if the power of the upper control device is turned off by the above-described upper power saving device, the operation signal from the upper operation device and the detection signal from the upper sensor in the vicinity of the worktable cannot be extracted, There is a problem that the state of the upper part is lost. For this reason, it may not be possible to confirm the storage state of the sub-boom of the lifting device, and the vehicle may travel without the sub-boom stored.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and is intended for use in an aerial work vehicle having a lifting device in the vicinity of a workbench, which travels in a state where the lifting device is not stored. It is an object of the present invention to provide a device capable of preventing such a situation. Furthermore, the sub-boom is stored and detected without sacrificing its insulation and the power saving function of the battery in an insulated aerial work platform, thereby preventing the vehicle from traveling without the lifting device being stored. It is an object of the present invention to provide a device capable of performing the following.

[0013]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention provides a movable vehicle body, a jack for supporting the vehicle body, and an up-and-down motion, a telescopic motion, a turning motion and the like mounted on the vehicle body. A boom, a worktable pivotally connected to a boom tip in a vertical plane so as to be able to swing freely in a vertical plane, and a running means for moving the vehicle body, and a traveling means for mounting the vehicle body, and mounted near the worktable. A lifting device comprising: a lifting device; a storage state detector configured to detect a storage state of the lifting device; and a travel restriction unit configured to control travel by the travel unit when the storage state detector detects that the lifting device is not stored. A traveling control device for a work vehicle is provided.

The travel restricting means is, for example, a jack operation restricting means which does not store a jack for supporting the vehicle. In addition, there are wheel regulating means for braking wheels, drive source regulating means for stopping a driving source such as an engine or a hydraulic motor, and PTO regulating means for regulating a power take-off (PTO) PTO to a hydraulic pump or the like. Further, a combination of these, for example, even when the jack is stored while the sub-boom is not stored, the PTO
When the vehicle is OFF or the gear is other than neutral, a complex regulating means such as stopping the engine (drive source) or performing an alarm operation is also one of the traveling regulating means.

Also, a battery installed near the workbench and an upper part installed near the workbench for controlling the operation of a boom / lifting device or the like upon receiving an operation signal from an upper operation device provided on the workbench. A storage state detector and an upper controller are configured to operate by receiving power supply from a battery, and a change in a detection signal by the storage state detector does not continue for a certain period of time, and the operation is not performed. The power supply from the battery to the upper controller is cut off when no signal is generated for a certain period of time, and the power is supplied to the upper controller when there is a change in the detection signal by the storage state detector or an operation signal. In the case of an insulated aerial work platform having an upper power saving device for restarting power supply, the upper power saving device supplies power from the battery to the upper control device and the storage state detector. When it is blocked, to be configured so that power supply from the battery by the upper power saving device for regulating the driving by the driving means on the basis of the detection of a storage state detector immediately before being cut off is preferred.

The use of the traveling restricting device for an aerial work vehicle having such a configuration can reliably prevent the vehicle from traveling with the lifting device not stored. In the case of an insulated aerial work platform, the detection signal of the storage state detector does not change during power saving even if the power supply is cut off by the upper power saving device. We can grasp state. Therefore, if the travel of the vehicle body is restricted based on the detection immediately before the power is cut off by the upper power saving device, it is possible to reliably prevent the vehicle from traveling without the lifting device stored.

[0017]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an insulated aerial work vehicle 1 having an aerial work vehicle travel restriction device according to the present invention.
Is shown in As shown, the insulated aerial work vehicle 1 can travel with wheels 3 in front and rear of the vehicle, and is configured based on a truck vehicle having a driving cabin 5 at a front portion. Outrigger jacks 6 for lifting and supporting the vehicle body 4 are arranged on both left and right sides of the front and rear of the vehicle body of the truck vehicle. A swivel 7 which is driven by a swivel motor (not shown) and is capable of horizontal swivel is mounted on the vehicle body at the rear of the body. A boom 9 having a base end pivotally attached thereto is attached to the swivel base 7, and the boom 9 is configured to be raised and lowered by a lifting cylinder 11. The boom 9 is configured such that a base end boom 9a, an intermediate boom 9b, and a distal end boom 9c are nested and can be extended and retracted by a built-in extension cylinder (not shown).

A vertical post 13 is provided at the tip of the tip boom 9c.
Are pivotally connected in the vertical direction, and the vertical post 13 is always in a vertical state regardless of the elevation angle of the boom 9 by the upper leveling cylinder 15 disposed between the lower end of the vertical post 13 and the distal end of the tip boom 9c. The swing is controlled so as to be free to swing. The vertical post 13 is provided with a horizontal arm 17 that is configured to be able to move horizontally. At the distal end of the horizontal arm 17, a worktable 19 in the form of a bottomed square tube is attached. As a result, the work table 19 is always kept horizontal regardless of the angle of the boom 9. The horizontal arm 17 is rotated around the vertical post 13 by the operation of a swing motor (not shown) incorporated in the vertical post 13, and the work table 19 is configured to be horizontally swingable (swing freely). ing.

The work table 19 is made of GFRP (Glass Fiber Rein).
It is integrally molded into a bottomed rectangular tube using an electric insulating material such as forced plastic), and the tip boom 9c is also formed using the same electric insulating material. As shown in FIGS. 2 and 5, an upper control device 23 provided on the workbench 19 and a lower control device 81 provided on the vehicle body side are connected via an optical cable 101. Is photoelectrically converted by the photoelectric conversion device 100 above and below the boom 9, and light communication is performed in the boom portion. For this reason, even when the worker mistakenly operates the boom in the electric construction work or the like and brings the work table 8 into contact with a high-voltage live line or the like, the current is short-circuited to the ground through the boom or the signal line in the boom. That is, the worker riding on the workbench 19 is prevented from being electrocuted or the vehicle being damaged.

Next, the lifting device 30 will be described with reference to FIG. The lifting device 30 is disposed at the upper end of the vertical post 13 projecting upward from the upper part of the horizontal arm 17. The lifting device 30 includes a first rotating body 31 rotatably mounted in a horizontal plane at an upper end portion of the vertical post 13, and a swing member pivotally connected to an upper end portion of the first rotating body 31 and swingable in a vertical direction. 41, a second rotating body 51 attached to the upper end of the swinging member 41 and rotatable,
A sub-boom 61 having a base end attached to the upper end of the rotating body 51 is configured.

The first rotating body 31 connects a pair of side plates 33 which are opposed to each other with a predetermined gap in the left-right direction (perpendicular to the plane of FIG. 2) and a lower end of the pair of side plates 33. And a bottom plate portion 35. Between the lower part of the bottom plate part 35 and the upper surface of the horizontal arm 17, a first receiving member 37 having a through hole in the center and rotatable in the horizontal direction is provided. The first bearing member 37 includes an upper part member 37a and a lower part member 37b which are divided into two upper and lower parts, and the upper part of the vertical post 13 passes through the through hole of the first bearing member 37. Then, the upper surface of the upper member 37a is attached to the bottom surface of the bottom plate portion 35, and the lower surface of the lower member 37b is attached to the upper surface of the horizontal arm 17.
1 and between the horizontal arm 17. The right end of the bottom plate portion 35 projects horizontally from the first bearing member 37, and a fixed pin 38, which is movably inserted in the up-down direction, is provided at the tip end thereof.
Is installed. An urging spring 39 is mounted on the outer periphery of the upper end of the fixing pin 38, the upper end of the urging spring 39 is connected to a flange 38a formed on the upper end of the fixing pin 38, and the lower end of the urging spring 39 is connected to the bottom plate. It is connected to the upper surface of 35 and urges the fixing pin 38 downward. First rotating body 3
1 is approximately 90 in the clockwise and counterclockwise directions in plan view.
A pair of locking holes 40 for locking the fixing pin 38 are formed on the upper surface of the horizontal arm 17 disposed below the fixing pin 38 that moves when rotated by an angle. The fixing pin 3
Reference numeral 8 is not limited to the above-described one, and may not include the urging spring 39. In this case, the fixing pins 38 are manually attached to the bottom plate 35. The above-described urging spring 39 urges the fixing pin 38 downward. However, the present invention is not limited to this. The urging spring 39 may urge the fixing pin 38 upward. In this case, when the swinging member 41 swings from the standing state to the storage position side, the fixing pin 38 comes into contact with the swinging member 41 and is pushed downward to be inserted into the locking hole 40.

A swing member 4 is provided between the upper portions of the pair of side plate portions 33.
One end of the lower end of 1 is pivotally connected. Swing member 4
1 has a rectangular cross section, the lower end of which is connected to the rod end of the sub-up / down cylinder 43 at the other end, and the bottom end of the sub-up / down cylinder 43 is formed of a pair of side ends 33. It is pivoted between the bottoms. The operation of the sub-lifting cylinder 43 is controlled by the upper control device 23 provided in the workbench 19. An insertion recess 45 extending in the up-down direction is formed in an upper portion of the swinging member 41, and a second bearing 47 is attached to an upper end and a lower end of the insertion recess 45. An upper end flange portion 49 protruding outward is formed at an upper end portion of the swing member 41.

The second rotating body 51 has a projecting portion 5 projecting downward.
3 and a connecting portion 55 connected to the upper portion of the projecting portion 53 and expanding outward, and a lower end flange portion 57 projecting outward at the lower end portion of the connecting portion 55. The protruding portion 53 is inserted into the insertion concave portion 45 of the swinging member 41 and fitted to the second bearing 47, and the lower end flange portion 57 is disposed to face the upper end flange portion 49, and a sliding bearing (not shown) is narrowly provided between the two. Have been. A sub-boom 61 is attached to an upper portion of the connection portion 55. As a result, the sub-boom 61 is held by the two rotating bodies 31 and 51 and the swing member 41.

A pin hole (not shown) is formed in the swinging member 41 outside the insertion recess 45, and a communication hole (not shown) communicating with the pin hole is formed in the middle of the projection 53 in the circumferential direction. Are formed at predetermined intervals. The rotation of the second rotating body 51 with respect to the swing member 41 is restricted by inserting the locking pin 59 in a state where the pin hole and the communication hole provided in the protruding portion 53 are communicated. Have been.

The sub-boom 61 has a sub-boom main body 63 and a winch mechanism 71. The sub-boom main body 63 is configured so that a base sub-boom 63a and a front-end sub-boom 63b whose lower surfaces of the base end portions are connected to the second rotating body 51 are nested, and can be extended and contracted by a built-in sub-extendable cylinder 65. . Tip sub boom 63b
A sub boom head 69 having a rotatable first sheave 67 is detachably attached to the tip of the sub boom. A second sheave 68 is attached to the upper surface 61a of the sub-boom main body 63 so as to be rotatable around a rotation center axis in the same direction as the normal direction of the upper surface 61a. The winch mechanism 71 includes a drum 73 around which a rope R is wound, and a built-in winch motor (not shown), and is configured to be able to draw out and wind the rope R from the drum 73. The rope R drawn out from the drum 73 is hung around the first sheave 67 and hangs vertically downward. A hook 75 is attached to the tip of the rope R.

The storage state detector 22 for detecting the storage state of the lifting device 30 having the above-mentioned configuration is constituted by the following three sensors. First, a first storage sensor for detecting whether the fixing pin 38 is fitted into one of the two locking holes 40 on the left and right to fix the orientation of the first rotating body 31, and the sub-boom cylinder 43 extends and the sub-boom body 63 The second storage sensor for detecting whether the second rotating body 51 is in the upright state and finally the locking pin 59 is rotated by the rotation of the second rotating body 51 as shown in FIG.
As shown in (c), the sub-boom main body 63 is fitted into a locking hole (not shown) provided in the swinging member 41 corresponding to an angle parallel to the upper end edge of the work table 19, and A third storage sensor for detecting whether the orientation is fixed. Only when all three sensors satisfy the storage state, it is detected as the storage state. Further, when the storage state changes (from the storage state to the non-storage state or from the non-storage state to the storage state), the storage state detector 22 transmits an electric signal to the upper power saving device 25 and the upper control device 23.

Next, the configuration of a control device including a jack operation restricting device 86 for restricting jack operation, which is one of the driving restrictions for the insulated aerial work vehicle 1, will be described with reference to FIG. An upper mechanism 20 provided on the workbench side of the insulated aerial work platform 1 includes an upper operation device 21 operated by a lever or the like, a storage state detector 22 for detecting a storage state of the sub-boom, and an upper operation device 21. The upper control device 23 which receives the operation signal from the controller to control the operation of the boom 19, the lifting device 30, etc., the battery 24 for operating the upper control device 23 and the storage state detector, and the detection by the storage state detector 22 The signal does not change continuously for a certain period of time,
In addition, when the operation signal has not been continuously generated for a certain period of time, the power supply from the battery 24 to the upper control device 23 is shut off, and when the detection signal changes by the storage state detector 22 or the operation signal is generated, the upper control is stopped. An upper power saving device 25 for restarting power supply to the device, and an upper hydraulic control valve _VU 26 for controlling a lifting actuator 27 of the lifting device and a worktable actuator 28 of the workbench 19 are configured.

On the other hand, a lower mechanism 80 provided on the vehicle body side of the insulated aerial work platform 1 includes a boom control operation device 84 and a jack control operation device 85 for regulating the operation of the jack 6.
And a lower control device 8 that receives an operation signal from a lower operation device 83 including a boom control device 84 and a jack control operation device 85 and controls the operation of the boom 19, the jack 6, and the like.
1, a memory 82 built in the lower control device 81 and storing a detection signal from the upper control device 23, and a memory 82
The jack operation restricting device 86 which is performed when the lower control device 81 determines that the lifting device is not retracted with reference to FIG.
Controlling the boom actuator 88 responsible for turning, etc.
It has a lower hydraulic control valve _VL 87 that controls a jack actuator 89 that performs a jack operation for supporting the vehicle body.

The upper mechanism 20 and the lower mechanism 80 are connected by an optical fiber 101 via a hydraulic hose 91 and a photoelectric conversion device 100, and the two are kept electrically independent.

Next, with respect to the operation of the lifting device 30 according to the present invention, a lifting operation for suspending and lifting a load placed on the ground by the lifting device 30 and a storing operation for storing the sub-boom 61 on the work table 19 will be described. explain. First, the lifting operation will be described. In addition,
As shown in FIG. 1, the insulated aerial work platform 1 is in a state where it is moved to a work site and the vehicle body 4 is lifted and supported by the outrigger jack 6, and the work table 19 is moved to a desired work position. It is assumed that Further, it is assumed that the sub-boom main body 63 is arranged at a position above the work table 19 in a fully contracted state.

Then, as shown in FIG. 2, the distal end (sub-boom head 69) of the sub-boom main body 63 is located above the work table 19 and inside the work table 19 in plan view. For this reason, in this state, it is impossible to lift the luggage and pivot the work table 19 or the lifting device 30. Then, the operator operates the upper operation device 21 to extend the sub telescopic cylinder 65 and move the tip of the sub boom main body 63 to the outside of the work table 19. In this state, the operator operates the winch mechanism 71, pulls out the rope R from the drum 73, moves the hook 75 downward, and hooks the baggage 80 placed on the ground.
Then, the winch mechanism 71 is operated to rotate the drum 73 in a direction in which the rope R is wound up, so that the load 80 is suspended and lifted to a desired position.

Next, the operation of the lifting device 30 when the sub boom 61 is stored in the workbench 19 will be described. As shown in FIG. 2, first, an operator (not shown) operates the upper operation device 21 to wind up the rope R, and moves the hook 75 to the vicinity of the first sheave 67. In addition,
The locking pin 59 is in a state of being inserted into a pin hole and a communication hole (not shown), and the rotation of the second rotating body 51 is in a restricted state. Then, the sub telescopic cylinder 65 is contracted to move the distal sub boom 63b toward the proximal sub boom 63a, and the sub boom main body 63 is fully contracted. When the sub-boom main body 63 is fully contracted, the operator presses the side of the sub-boom main body 63 in the horizontal direction (from the front side to the rear side in FIG. 2). When the sub-boom main body 63 is pressed, the first rotating body 31 rotates on the first bearing member 37,
The sub boom 61 rotates clockwise in plan view.
This is because the rotation of the second rotating body 51 with respect to the swinging member 41 is restricted by the locking pin 59, so that the sub-boom main body 63 does not rotate with respect to the swinging member 41, and is pressed against the sub-boom main body 63. This is because the pressure acts on the first rotating body 31. Then, as shown in FIG.
When the surface of the work table 19 facing the front surface is the front surface 19a,
The sub-boom main body 63 is rotated to a position substantially parallel to the front surface 19a. At the same time, the fixing pin 38 also pivots and moves to a position above the locking hole 40, and the lower end of the fixing pin 38 is inserted into the locking hole 40 by the urging spring 39. As a result, the first rotating body 31 and the horizontal arm 17 are fixed.

The sub-boom main body 63 is mounted on the front surface 1 of the work table 19.
When the operator moves to a position substantially parallel to 9a, the operator operates the upper operation device 21 to extend and move the sub-up / down cylinder 43. When the sub-relief cylinder 43 extends, FIG.
As shown in (1), the swing member 41 swings to the left with the pivot point with the first rotating body 31 as the swing center. As a result, the sub-boom main body 63 swings upward and moves to the upright position. In a state where the sub-boom main body 63 stands, the sub-boom main body 63 has moved outside the side surface 19 b of the workbench 19.

When the sub-boom main body 63 is in an upright state, the worker on the work table 19 pulls out the locking pin 59 to release the rotation restriction of the second rotary body 51, and then releases the sub-boom main body 63. Press down. In the above description, the procedure for turning the sub-boom main body 63 to the front surface 19a side of the work table 19 and then erecting the sub-boom main body 63 has been described. It may be pivoted to the side.

When the sub-boom main body 63 is pressed downward, the second rotary body 51 rotates and the sub-boom main body 63 swings toward the tip end of the work table 19. Then, as shown in FIG. 4D, the sub-boom main body 63 moves to a position lower than the upper surface of the worktable 19. As a result, the sub-boom body 63
The work table 19 will be described further with reference to FIG.
The tip of the sub-boom main body 63 is stored at a position inside the turning radius of the work table 19 below the upper surface of the work table 19 along the left side surface 19b of the work table 19. Hereinafter, this position is referred to as a left storage position. When the sub-boom main body 63 comes to the left storage position, the position of the sub-boom main body 63 is adjusted so that the pin hole communicates with the communication hole, and the locking pin 59 is inserted into the not-shown pin hole and the communication hole communicating with the sub-boom main body. 63 is controlled in the vertical direction.
1 is completed.

Next, the traveling control according to the present invention will be described. The present invention relates to a lifting device 3 for improving safety.
The sub-boom main body 63 is not stored, so that the aerial work vehicle does not travel. Therefore, for example, even if the worker inadvertently forgets to store the sub-boom main body 63, the vehicle does not start running. It is desirable to do.

For this purpose, the storage state detector 22 is configured as described above, so that it can be confirmed whether or not the sub-boom main body 63 is correctly stored at a predetermined storage position. When the operation of the boom actuator 88, the lifting actuator 27, the work table actuator 28, and the like by the worker on the work table 19 starts the storage operation of the sub-boom main body 63 without delay, the change of the storage state by the storage state detector 22 is detected. The signal is the upper controller 2
3, sent to the lower control device 81 via the photoelectric converter 100, the optical fiber 101 and the like. The detection signal is stored in the memory 82 in the lower control device 81. Meanwhile boom 9
Is also confirmed by a boom storage state detector (not shown), and this detection signal is also transmitted to the lower control device 81.
Has been sent to For example, when an operation signal of the jack control operation device 85 of the lower operation device 83 by the operator's operation is sent to the lower control device 81, the storage of both is confirmed by referring to the latest data in the memory 82 and the storage status of the boom 8. Then, the jack operation restricting device 86 permits the operation of the jack actuator 89 such as the storage of the jack.

On the other hand, when the detection signal from the storage state detector 22 does not change for a certain period of time and the operation signal does not continuously generate for a certain period of time, the upper power saving device 25 switches the battery 24 from the upper controller 23 and Since the power supply to the storage state detector 22 is cut off, the upper mechanism 2
The state of 0 cannot be recognized from the lower mechanism 80. Therefore, the lower control device 81 does not grasp the storage state itself of the sub-boom main body 63 but grasps a change in the storage state,
The memory 82 stores whether the change is “from storage to non-storage” (A) or “non-storage to storage” (B). The upper power saving device 25 can restart the power supply to the upper control device 23 when a change in the detection signal by the storage state detector 22 occurs. The change of the storage state is stored in the memory 82 whether or not it is shut off. That is, if the state change (A or B) stored last in the memory 82 is viewed, the sub-boom main body 6 at that time is checked.
3 can be ascertained reliably. As a result, the jack operation restricting device 86 stores the latest (final)
If the data is A, the sub-boom main body 63 is not stored and the jack cannot be stored so that the traveling of the vehicle body is restricted. If the latest (final) data is B, the sub-boom main body 63 is in the stored state and the vehicle is running. Do not regulate.

The power required to generate a detection signal from the storage state detector 22 or an operation signal from the upper operation device 21 may be provided by a battery 24 or a small battery (not shown) for signal generation. May be provided in the storage state detector 22 and the upper operation device 21.

In the above embodiment, the case where the jack operation restricting means is used as the traveling restricting means has been described. However, as the traveling restricting means, various configurations other than the above embodiment can be considered. For example, PTO regulating means for regulating the operation of the PTO may be used as the travel regulating means. The PTO is used to drive the hydraulic pump by extracting the driving force of the engine, etc. If the operation of the PTO is regulated, the hydraulic pump will not work, so the jack cannot be naturally operated because the hydraulic pump will not work. To play. In addition, even when the drive source regulating means for stopping the rotation or the activation of the engine or the like is used, the jack operation is of course not possible and the vehicle body itself cannot be run, so that the same effect is obtained. Also, the same effect can be obtained by using a combination of a wheel restricting means, a drive source restricting means, a PTO restricting means, and the like that regulates the wheel 3 by braking or fixing the wheel 3. For example, even when the jack is retracted while the sub-boom is not retracted, if the PTO is shut off or the gear is other than neutral, the engine (drive source) is stopped or an alarm is activated. May be used. As described above, the travel restriction means may further include an alarm operation. Here, the alarm operation means that the worker is alerted by using an alarm buzzer, an alarm lamp, or the like.

In view of the object of the present invention, in addition to the above configuration, for example, when the jack is instructed to be stored by the jack control operation device 85 or when the gear is shifted to a position other than neutral, the storage state detector 22 of the sub-boom is detected. A similar effect can be obtained even if the detection is performed.

[0042]

As described above, according to the present invention,
When the retracted state detector detects that the lifting device is not retracted, the traveling restricting device is configured to regulate the traveling of the vehicle body, so that it is ensured that the vehicle travels without the lifting device being retracted. Can be prevented.

Further, even in an insulated aerial work vehicle having a power saving device for suppressing the power consumption of the battery, the running of the vehicle body can be regulated in accordance with the storage state of the lifting device, and the insulation and the battery can be controlled. Without sacrificing the power-saving function of the vehicle, it is possible to reliably prevent the vehicle body from traveling without the lifting device being stored.

[Brief description of the drawings]

FIG. 1 shows a side view of an insulated aerial work vehicle equipped with a travel restriction device according to the present invention.

FIG. 2 shows a side view of the lifting device according to the embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the lifting device according to the embodiment of the present invention.

FIG. 4 is a diagram for explaining the operation of the lifting device according to the embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of an operation / control device according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 4 body 6 jack 9 boom 19 work table 21 upper operation device 22 (sub boom) storage state detector 24 battery 25 upper power saving device 86 jack operation restricting device

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Takashi Kawakado 414-1, Higashimine Sugawa, Oji, Shinji-mura, Tone-gun, Gunma F-term (reference) 3F333 AA08 AB04 BA12 BB24 CA04 CA15 DA10 DB10 FA10 FA20 FD20

Claims (3)

[Claims] A movable body, a jack for supporting the vehicle body, a boom mounted on the vehicle body so as to be capable of pivoting, raising and lowering, expanding and contracting, and the like. An aerial work platform having a worktable movably pivotally connected and kept horizontal irrespective of the up-and-down movement of the boom, running means for running the vehicle body, and a lifting device mounted near the worktable; A travel restricting device, comprising: a storage state detector that detects a storage state of the lifting device; and a travel that restricts travel by the traveling unit when the storage state detector detects that the lifting device is not stored. A travel restriction device for an aerial work vehicle, comprising a restriction means. 2. The travel restricting device for an aerial work vehicle according to claim 1, wherein the travel restricting means is a jack operation restricting means for restricting the storage of the jack. 3. A battery installed near the work table, and an operation signal from an upper operation device provided near the work table and received from an upper operation device provided on the work table, for operating the boom, the lifting device, and the like. An upper control device for performing control, wherein the storage state detector and the upper control device are configured to operate by receiving power supply from the battery, and a detection signal by the storage state detector continues for a predetermined time. And when the operation signal has not been continuously generated for a certain period of time, the power supply from the battery to the upper control device is cut off, and the detection signal change or the operation by the storage state detector is performed. An upper power saving device that restarts the power supply to the upper control device when a signal is generated, wherein the upper power saving device uses the upper power saving device to transfer the battery from the battery. When the power supply to the storage state detector is interrupted, the traveling by the traveling means is performed based on the detection of the storage state detector immediately before the power supply from the battery is interrupted by the upper power saving device. The travel restricting device for an aerial work vehicle according to claim 1, wherein the driving is restricted.