JP3077611U - Safety equipment for aerial work vehicles - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The possibility of damaging a work target even when an operator operates a lifting device by mistake while operating a working device provided near a worktable. Eliminate the problem and improve work safety. SOLUTION: When a sub-boom operation lever 53 is in an operating state, a first limit switch 130 is set to an ON position so that a power supply line 104 is closed,
The power from the battery 101 is supplied to the coil 111 of the first relay 110, and the switch piece 112 of the relay 110 is supplied.
Open the power supply line 102 connecting the boom operation signal output unit 51a and the battery 101. When the winch operating lever 54 is in the operating state, the second limit switch 140 is set to the ON position and the power supply line 1 is turned on.
05 is closed, the power from the battery 101 is supplied to the coil 121 of the second relay 120, and the switch piece 122 of the relay 120 opens the power supply line 102.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a safety device for an aerial work vehicle having a structure in which a work table is provided on a vehicle body via a lifting device and a work device such as a winch device is provided near the work table.

[0002]

[Prior art]

 The aerial work vehicle has a configuration in which a workbench is provided on the vehicle body via a boom or other elevating device, and workers who board the workbench operate the boom themselves to perform work. The work can be performed by moving the table to a desired position. In such an aerial work vehicle, work equipment such as a winch device or a temporary arm device is installed near the work table or work table, and these devices are operated from the work table to perform work at a high place. Some of them can be performed efficiently.

[0003]

[Problems to be solved by the invention]

 However, in an aerial work vehicle equipped with such a working device, the operation of the lifting device and the operation of the working device can be performed independently of each other. Therefore, when the operating device of the boom is erroneously operated while the operating device is being operated, the operating device may be moved and the work target may be damaged. For example, when a boom is operated by mistake while lifting a heavy object such as a transformer with a winch device (or a part of the body is accidentally hit by the operating device of the boom) In such a case, there is a risk that the suspended object may be dropped or may collide with a structure (for example, a utility pole).

[0004] The present invention has been made in view of such a problem, and in the case where an operator operates a lifting device by mistake while operating a working device provided near a worktable. It is an object of the present invention to provide a safety device for an aerial work vehicle having a configuration capable of improving the safety of work without fear of damaging the work target.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the safety device for an aerial work vehicle according to the present invention includes a vehicle body, an elevating device (for example, the boom 30 in the embodiment) provided on the vehicle body, and a movable device such as an elevating device. A working table, a working device provided at or near the working table (for example, the sub-boom 73 and the winch 75 in the embodiment), and a first control means (for example, the Boom operation lever 51 and controller 60) and second control means (for example, sub-boom operation lever 53, winch operation lever 54 and controller 60 in the embodiment) for controlling the operation of the working device. While the operation of the working device is being performed, the operation of the lifting device by the first control means is prohibited.

In such a safety device, the operation of the lifting device is prohibited while the operation of the working device is being performed. Even when trying to operate the device (including when a part of the body is touched and moved by operating means such as a lever for operating the working device), the lifting device does not operate.

Here, specifically, the first control means is output by operating an elevating device operating means (for example, a boom operating lever 51 in the embodiment) and an elevating device operating means for inputting an operation of the elevating device. An elevator control means (for example, the controller 60 in the embodiment) for controlling the operation of the elevator in response to an elevator operation signal (for example, a boom operation signal in the embodiment), and the second controller is a work device. (For example, the sub-boom operation lever 53 and the winch operation lever 54 in the embodiment) and the operation device operation signal output by operating the operation device (for example, the sub-boom 73 in the embodiment). Working device control means (for example, an embodiment) If the operation device operating means is operated, an electric circuit device for inhibiting the input of the elevating device operation signal to the elevating device control means may be provided. .

[0008] Similarly, the first control means receives the lifting device operation means for inputting the operation of the lifting device and the lifting device operation signal output by operating the lifting device operation means, and controls the operation of the lifting device. The second control means receives the work equipment operation signal output by the operation of the work equipment operation means for inputting the operation input of the work equipment. An operation detecting means for detecting whether or not the operating device operating means is operated when the operating device controlling means for controlling the operation is provided (for example, the first and second limit switches 130 and 140 in the embodiment); The lifting device control means ignores the input lifting device operation signal while the operation detector detects that the working device operation means is being operated. It is good also as a result.

[0009]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 3 is a side view of an example of the aerial work vehicle to which the first embodiment of the safety device according to the present invention is applied. First, the configuration of the aerial work vehicle will be described.

As shown in FIG. 3, the aerial work vehicle 1 is provided with a boom 30 on a vehicle body 10 having tire wheels 11 and capable of running on a road. A work table 40 for boarding the worker is provided. The boom 30 is of a telescoping type, and can be expanded and contracted in the longitudinal direction by hydraulically driving a built-in telescopic cylinder 31, and its base end is a turning table provided on the vehicle body 10. The boom 30 is pivotally supported by a foot pin 22 above the support column 21 of the boom 20 and is raised and lowered in a vertical plane passing through the center axis of the boom 30 itself by hydraulically driving an up-and-down cylinder 24 provided between the boom 30 and the swivel 20. Is possible. The swivel 20 can be rotated in a horizontal plane by hydraulically driving a swivel motor 23 built in the vehicle body 10, whereby the tip of the boom 30 can be swiveled around the rotation axis of the swivel 20. Is possible.

A vertical post 32 is attached to a tip end of the boom 30, and rotatably supports a bracket 41 projecting from a side of the work table 40. The vertical post 32 is always held vertically by a hydraulic cylinder (not shown) provided at the distal end of the boom 30, and the floor of the worktable 40 is always kept horizontal. A swing motor 42 is provided in a bracket 41 of the worktable 40, and the worktable 40 can be swung around the vertical post 32 by hydraulically driving the swing motor 42.

Outrigger jacks 12 are provided at four front, rear, left, and right sides of the vehicle body 10. By operating a jack operating lever (not shown) provided at the rear of the vehicle body 10, the overhanging operation is performed. And the storing operation are possible. These outrigger jacks 12 are used by projecting downward so that the vehicle body 10 is lifted and supported before starting work at height.

As shown in FIG. 3, a winch device 70 is mounted above the vertical post 32. As shown in FIG. 4, the winch device 70 includes a bracket 72, a sub-boom 73, a winch 75, a rope 76, a hook 79, and the like. The bracket 72 is a sub-boom provided on an upper portion of the vertical post 32. The swing member 71 is vertically swingably mounted. The sub-boom turning member 71 can be turned 360 degrees around the vertical axis by hydraulically driving a sub-boom turning motor 81 built in the vertical post 32, and the bracket 72 is provided between the sub-boom turning member 71 and the sub-boom turning member 71. The sub-boom hoist cylinder 82 can be raised and lowered in the upper and lower surfaces by hydraulically driving. A sub-boom 73 made of an electrically insulating material is loosely inserted in the sub-boom play insertion portion 72 a formed in the bracket 72, and one of the plurality of pin holes H provided on the side surface of the sub-boom 73 is inserted into the sub-boom of the bracket 72. By inserting the fixing pin 74 horizontally with the pin holes (not shown) formed in the loose insertion portion 72a aligned with each other, the sub boom 73 is adjusted to a desired length and connected to the sub boom loose insertion portion 72a. You can do it.

A winch 75 is provided at a position above the sub-boom play insertion portion 72 a of the bracket 72, and the winch 75 can be rotated in forward and reverse directions by hydraulic drive of a winch drive motor 83. A rope 76 made of an electrically insulating material that is wound up and fed out by a winch 75 is wound around a sheave 78 that is rotatably supported by a sheave bracket 77 attached to the tip of a sub-boom 73. A hook 79 for suspension is attached to the tip of the rope 76 hanging down from 78.

As shown in FIG. 1, the operation box 50 provided on the workbench 40 includes a boom operation lever 51 for raising, lowering, extending, and retracting the boom 30, and a swing operation of the workbench 40. And a swing operation lever 52 for performing the operation. The boom operation lever 51 is used to tilt the boom 30 in the front-rear direction corresponding to the up-and-down operation of the boom 30, to tilt the boom 30 in the left-right direction corresponding to the expansion / contraction operation of the boom 30, and to turn the boom 30 (of the swivel table 20). A twisting operation in the direction of the axis corresponding to the operation is possible, and the swinging operation lever 52 is capable of performing a tilting operation to the left and right corresponding to the swinging operation on the vertical post 32 of the workbench 40.

When the boom operation lever 51 is tilted back and forth, left and right, or twisted around an axis, the boom 30 can be raised, lowered, extended, and turned according to the operation state (operating direction and amount). Drive signals for the up-and-down cylinder 24, the telescopic cylinder 31, and the turning motor 23) are output from a boom operation signal output unit 51a including three potentiometers provided at the base end of the lever 51, and output via the electric circuit device 100. Is input to the upper controller 61 (the part of the controller 60 installed on the workbench 40 side). When the swing operation lever 52 is tilted in the left and right direction, a swing operation signal of the work table 40 (a drive signal of the swing motor 42) corresponding to the operation state is provided at the base end of the lever 52. The swinging operation signal output unit 52 a including one potentiometer outputs the signal, and is input to the upper controller 61 via the electric circuit device 100.

As shown in FIG. 1, the operation box 50 includes a sub-boom operation lever 53 for turning and raising and lowering the sub-boom 73, and a winding / unwinding operation of a rope 76 by a winch 75. The winch operation lever 54 is provided. The sub-boom operation lever 53 can perform a tilting operation in the left-right direction corresponding to the turning operation of the sub-boom 73 and a tilting operation in the front-back direction corresponding to the raising / lowering operation of the sub-boom 73. A tilting operation in the front-rear direction corresponding to 75 forward / reverse rotation operations is possible.

When the sub-boom operation lever 53 is tilted in the left-right or front-rear direction, the sub-boom 73 is turned and the up-and-down operation signal (the drive signal for the sub-boom turning motor 81 and the sub-boom up-and-down cylinder 82) is changed according to the operation state. The signal is output by a sub-boom operation signal output unit 53 a including two potentiometers provided at the base end of the lever 53, and is input to the upper controller 61 via the electric circuit device 100. When the winch operation lever 54 is tilted in the front-rear direction, a rotation operation signal of the winch 75 (a drive signal of the winch drive motor 83) corresponding to the operation state is provided at the base end of the lever 54. The signal is output from a winch operation signal output device 54a composed of two potentiometers, and is input to the upper controller 61 via the electric circuit device 100.

As described above, the operation signal (drive signal of each actuator) by operating the levers 51 to 54 is input to the upper controller 61, but the upper controller 61 transmits a signal transmission line (not shown) extending inside the boom 30. ) Is connected to the lower controller 62 (the part of the controller 60 on the vehicle body 10), and the boom operation signal output by operating the boom operation lever 51 out of the operation signals, that is, the up-and-down cylinder 24, Each drive signal of the telescopic cylinder 31 and the turning motor 23 is transmitted to the lower controller 62 through this signal transmission line (see FIG. 1).

As shown in FIG. 1, the oil discharged from the hydraulic pump P provided in the vehicle body 10 passes through an oil passage (not shown) extending through the up-and-down cylinder 24, the telescopic cylinder 31, the swing motor 23, and the boom 30. The lower controller 62 controls the control valves V <b> 1 to V <b> 1 based on the drive signals of the up / down cylinder 24, the extension cylinder 31, and the turning motor 23 transmitted from the upper controller 61. The V3 is electromagnetically driven, thereby operating the hoisting cylinder 24, the telescopic cylinder 31, and the turning motor 23 to move the boom 30 up and down, expanding and contracting, and turning. The upper controller 61 electromagnetically drives the control valve V 4 based on the input drive signal of the swing motor 42, thereby operating the swing motor 42 to swing the worktable 40 around the vertical post 32. Swing operation.

The oil discharged from the hydraulic pump P is also supplied to the sub-boom swing motor 81, the sub-boom up / down cylinder 82 and the winch drive motor 83 via the oil passage extending inside the boom 30. The upper controller 61 electromagnetically drives the control valves V5 and V6 based on the input drive signals of the sub-boom swing motor 81 and the sub-boom up / down cylinder 82, and operates the sub-boom swing motor 81 and the sub-boom up / down cylinder 82 to activate the sub-boom 73. The control valve V7 is electromagnetically driven based on the input drive signal of the winch drive motor 83, and the winch drive motor 83 is operated to rotate the winch 75 in the forward and reverse directions.

As described above, the operator who has boarded the work table 40 can operate the boom operation lever 51 and the swing operation lever 52 from the operation box 50 to move the work table 40 to a desired position. At the same time, it is possible to perform operations such as lifting by the winch 75 by operating the sub-boom operation lever 53 and the winch operation lever 54.

As described above, when the levers 51 to 54 are operated, an operation signal (drive signal) corresponding to the operation state of each lever is input to the controller 60 (directly the upper controller 61). In the aerial work vehicle 1, the operation signal is input via the electric circuit device 100 shown in FIG. Hereinafter, the configuration of the electric circuit device 100 will be described with reference to FIG. 2, but FIG. 2 shows a state in which both the sub-boom operation lever 53 and the winch operation lever 54 are not operated (in a neutral position). I have.

As shown in FIG. 2, the boom operation signal output device 51 a is connected to the battery 101 via the power supply line 102, and the swing operation signal output device 52 a is connected to the battery 101 via the power supply line 103. It is connected. The sub-boom operation signal output device 53a is connected to the battery 101 via the power supply line 106, and the winch operation signal output device 54a is connected to the battery 101 via the power supply line 107. The first relay 110 and the second relay 120 are respectively composed of coils 111 and 121 and switch pieces 112 and 122. Each of the switch pieces 112 and 122 is connected between the battery 101 and the boom operation signal output unit 51a. The power supply line 102 is connected to and can be opened and closed.

The coil 111 of the first relay 110 is connected to the battery 101 via the power supply line 104, and the coil 121 of the second relay 120 is connected to the battery via the power supply line 105. ing. When the coil 111 of the first relay 110 is not receiving power supply from the battery 101 (is not magnetized), the switch piece 112 is located at the ON position (the position at which the power supply line 102 is closed) (FIG. (State 2), when the power is supplied from the battery 101 (magnetized), the switch piece 112 is electromagnetically attracted to the off position (the position where the power supply line 102 is opened). Also, when the coil 121 of the second relay 120 is not receiving power supply from the battery 101 (is not magnetized), the switch piece 122 is located at the ON position (the position at which the power supply line 102 is closed) (FIG. 2). In this state, when the power is supplied from the battery 101 (magnetized), the switch piece 122 is electromagnetically attracted to position the switch piece 122 in the off position (the position where the power supply line 102 is opened).

The first limit switch 130 is provided at the base end of the sub-boom operation lever 53, and is located at the off position when the sub-boom operation lever 53 is not operated (is in the neutral position) and is located at the power supply line. The power supply line 104 is closed when the lever 104 is opened (in the state shown in FIG. 2) and the lever 53 is tilted left and right or back and forth (not at the neutral position). On the other hand, the second limit switch 140 is provided at the base end of the winch operating lever 54. When the winch operating lever 54 is not operated (is in the neutral position), the second limit switch 140 is located in the off position and the power supply line 105 is disconnected. When the lever 54 is opened (the state shown in FIG. 2) and the lever 54 is tilted in the front-rear direction (not at the neutral position), the power supply line 105 is closed at the ON position.

In such a configuration, when both the sub-boom operation lever 53 and the winch operation lever 54 are not operated (the state in FIG. 2), both the first limit switch 130 and the second limit switch 140 Since the power supply lines 104 and 105 are opened at the OFF position and the switch pieces 112 and 122 of both relays 110 and 120 are both at the ON position, when the boom operation lever 51 is operated, the boom operation signal (the up-and-down cylinder 24, drive signals of the telescopic cylinder 31 and the turning motor 23) are input to the controller 60 (directly the upper controller 61). When the swing operation lever 52 is operated, the swing operation signal (drive signal of the swing motor 42) is unconditionally input to the controller 60 (directly the upper controller 61). When both the lever 53 and the winch operating lever 54 are not operated, the boom 30 can be raised, contracted, extended and turned by operating the boom operating lever 51, and the operation can be performed by operating the swing operating lever 52. The swing operation of the table 40 can be performed.

On the other hand, when the sub-boom operation lever 53 is in the operating state, the first limit switch 130 is located at the ON position and closes the power supply line 104, so that the power from the battery 101 is supplied to the coil 111 of the first relay 110. Is supplied, and the switch piece 112 of the relay 110 opens the power supply line 102. When the winch operation lever 54 is in the operating state, the second limit switch 140 is located at the ON position and closes the power supply line 105, so that the power from the battery 101 is supplied to the coil 121 of the second relay 120. Supplied, the switch piece 122 of the relay 120 opens the power supply line 102.

Therefore, in a state where at least one of the sub-boom operation lever 53 and the winch operation lever 54 is operated (not in the neutral position), even if the boom operation lever 51 is operated, the boom operation signal is output. (Each driving signal of the up-and-down cylinder 24, the telescopic cylinder 31, and the turning motor 23) is not input to the controller 60, and when the swing operation lever 52 is operated, the swing operation signal (the drive signal of the swing motor 42). Is only input to the controller 60. For this reason, the up / down, extension / contraction, and turning operations of the boom 30 by the boom operation lever 51 are prohibited, and only the swing operation of the worktable 40 by the swing operation lever 52 is possible.

As described above, in the aerial work vehicle 1, while the winch device 70 is operated (the sub-boom 73 is turned, raised or lowered, or the rope 76 is wound up and fed out by the winch 75), the boom 30 is raised and lowered. In this case, the operation of the boom operation lever 51 is inadvertently operated while the winch device 70 is being operated (the boom operation lever 51 cannot be moved). The boom 30 does not move up and down, extend and retract, and swivel. For this reason, it is possible to avoid an unsafe operation operation of operating the boom 30 while operating the winch device 70, and it is possible to break a suspended object by the winch 75 to be worked by hitting a utility pole or the like. Work safety can be improved.

Here, the work table 40 can be swung even during the operation of the winch device 70 because the work table 40 is swung around the vertical post 32. However, the winch device 70 itself does not move. Rather, in high-altitude work, there is a case where the work table 40 needs to be swung while the winch device 70 is operating. Note that there is no sub-boom operation signal (sub-boom rotation motor 81, each drive signal of the sub-boom up / down cylinder 82) by operating the sub-boom operation lever 53, and no winch operation signal (drive signal of the winch drive motor 83) by operating the winch operation lever 54. Since the conditions are input to the controller 60 (directly to the upper controller 61), the turning of the sub-boom 73, the raising / lowering operation, and the turning operation of the winch 75 are always possible.

Next, a second embodiment of the safety device according to the present invention will be described. The safety device according to the second embodiment is applied to the aerial work vehicle 1 shown in the first embodiment, and the configuration shown in FIG. 1 can be used as it is in the second embodiment. Shall be. However, the electric circuit configuration in FIG. 1 is different from that in the first embodiment, and this will be described below.

FIG. 5 shows a configuration of an electric circuit 100 ′ in the safety device of the second embodiment, together with a controller 60. The difference between the electric circuit device 100 ′ in the second embodiment and the electric circuit device 100 (shown in FIG. 2) in the first embodiment is that the first and second relays 110 and 120 in the electric circuit device 100 are different. The power supply line 102 is removed, and the end of the power supply line 104 on the side of the coil 111 is connected to the controller 60 (upper controller 61), which is used as a signal transmission line 104 '. The point that the end of the wire 105 on the coil 121 side is connected to the controller 60 (upper controller 61) and this is used as a signal transmission line 105 '. FIG. 5 shows a state in which both the sub-boom operation lever 53 and the winch operation lever 54 are not operated (they are in the neutral position), as in the case of FIG.

In such a configuration, even when either the sub-boom operation lever 53 or the winch operation lever 54 is in the operating state, the boom operation signal output by operating the boom operation lever 51 and the operation of the swing operation lever 52 are operated. All of the swing operation signals output by the controller are input to the controller 60 (directly the upper controller 61). However, here, the control of the controller 60 is different from that of the first embodiment, the sub-boom operation lever 53 is in the operating state (not in the neutral position), the first limit switch 130 is closed, and the signal transmission line is closed. When a signal indicating that the sub-boom operation lever 53 is being operated is received from 104 'or the winch operation lever 54 is in the operating state (not in the neutral position), the second limit switch 140 is closed. While receiving the signal indicating that the winch drive lever 54 is being operated from the signal transmission line 105 ', the boom operation signal input by operating the boom operation lever 51 is ignored. .

In the safety device having such a configuration, similarly to the case of the safety device according to the above-described first embodiment, the operation of the winch device 70 (the rotation of the sub-boom 73, the undulation, or the winding of the rope 76 by the winch 75). During the extension, the up-and-down movement, extension and contraction, and turning operation of the boom 30 are prohibited, so that the same effect as the above-described safety device according to the first embodiment can be obtained.

Although the embodiment of the safety device for the aerial work vehicle according to the present invention has been described above, the scope of the present invention is not limited to the above. For example, the configuration of the electric circuit 100 shown in the first embodiment is such that the boom operation signal is input to the controller 60 while the sub-boom operation lever 53 and the winch operation lever 54, which are the operation means of the winch device 70, are operated. Other configurations may be used as long as the configuration is prohibited. In both of the above embodiments, the upper controller 61 and the lower controller 62 are provided on the workbench side 40 (upper controller 61) and on the vehicle body 10 due to the configuration of the aerial work vehicle 1. And a controller 60 combining the two controllers 61 and 62 corresponds to the first control means and the second control means in the claims. Corresponds to the lifting device control means and the working device control means.

In the above-described embodiment, the winch device 70 is shown as an example of the work table 40 or the work apparatus installed near the work table 40. However, the winch apparatus 70 may be a temporary brace device, a hot stick support device, or the like. Other devices may be used. Alternatively, a tool (attachment tool) such as a drill or a caulking device which is operated by being connected to a hydraulic pressure extracting device provided on the work table 40 may be used.

In the above-described embodiment, a case where the boom operation lever 51 (elevation device operation means) is on the work table 40 is taken as an example while the operation device is being operated from the work table 40. Although the configuration in which the boom 30 is not actuated even when the boom operation lever 51 provided on the work table 40 is operated has been described, the boom operation lever is also provided on the vehicle body 10 in addition to the work table 40. During operation of the working device from the table 40, the configuration in which the boom 30 does not operate even when the boom operation lever provided on the vehicle body 10 is operated can be used in combination with the above configuration.

In the above-described embodiment, the boom 30 of the aerial work vehicle 1 is of a straight extension type that expands and contracts in the longitudinal direction, but may be a bending and extension type or the like. The elevating device of the work table 40 is not limited to the one that can move the work table 40 three-dimensionally like the boom 30, and the one that can only vertically move the work table like a scissors device. Good.

In the above-described embodiment, the swing of the work table 40 can be performed even while the work devices (the sub-boom 73 and the winch 75) are operating. Is mounted on the vertical post 32 and does not move even when the work table 40 is swung. For example, when the work apparatus is directly mounted on the work table 40, the work table 40 is swung. When the working device itself is moved when the operating device is moved, not only the raising / lowering, extension / retraction, and turning operation of the boom 30 is prohibited, but also the swinging operation of the working table 40 is prohibited during the operation of the working device. It may be. If the work equipment is the above-mentioned attachment tool, the operator on the work table 40 performs the work while operating this tool, so that the swing movement of the work table 40 is prohibited. It is preferred that it is so.

[0041]

[Effect of the invention]

 As described above, the safety device for the aerial work platform according to the present invention is configured so that the operation of the lifting device is prohibited while the operation of the operation device is performed. If you attempt to operate the lifting device by mistake during the operation (including the case where a part of your body is touched and moved by operating means such as a lever that operates the working device) and The lifting device does not operate. For this reason, it is possible to avoid an unsafe operation operation of operating the lifting device while operating the operation device, and it is possible to improve the safety of the operation by eliminating the possibility of damaging the operation target.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a safety device according to the present invention.

FIG. 2 is an electric circuit diagram showing a detailed configuration of an electric circuit device in the safety device.

FIG. 3 is a side view of an aerial work vehicle to which the safety device is applied.

FIG. 4 is a side view of a winch device in the aerial work vehicle.

FIG. 5 is an electric circuit diagram showing a detailed configuration of an electric circuit device in a second embodiment of the safety device according to the present invention.

[Explanation of symbols]

Reference Signs List 1 aerial work vehicle 10 body 30 boom (elevation device) 40 work table 51 boom operation lever (elevation device operation means) 52 swing operation lever 53 sub boom operation lever (operation device operation device) 54 winch operation lever (operation device operation device) 60 controller (lift device control means, work device control means) 61 upper controller 62 lower controller 70 winch device 73 sub boom (work device) 75 winch (work device) 100 electric circuit device

Claims (3)

[Utility model registration claims] 1. A vehicle body, an elevating device provided on the vehicle body, a worktable movable up and down by the elevating device, a working device provided near the worktable or a worktable, A first control unit that performs operation control; and a second control unit that performs operation control of the work device. While the work device is being operated by the second control unit, the first control unit performs the operation control. The safety device for an aerial work vehicle, wherein operation of the lifting device is prohibited. 2. The lift control device according to claim 1, wherein the first control unit receives the lift device operation signal output by operating the lift device operating unit for inputting the operation of the lift device and controls the operation of the lift device. The second control means receives a working device operation signal output by operating the working device operating device, and the working device operating device receives the working device operation signal output by operating the working device operating device. An operating circuit control means for performing operation control, wherein an electric circuit device for inhibiting input of the elevating device operation signal to the elevating device control means while the operating device operating means is operated is provided. The safety device for an aerial work vehicle according to claim 1, wherein: 3. The lift control device according to claim 1, wherein the first control unit receives the lift device operation signal output by operating the lift device operation unit, and controls the operation of the lift device. The second control means receives a working device operation signal output by operating the working device operating device, and the working device operating device receives the working device operation signal output by operating the working device operating device. Operating device control means for performing operation control, comprising operation detecting means for detecting whether or not the working device operating means is operated, wherein the lifting device control means, the operation device operating means by the operation detector 2. The safety of a high work vehicle according to claim 1, wherein the input of the lifting device operation signal is ignored while the operation is detected. All devices.