Certification system for aerial work platforms

Abstract

To provide an authentication system for a high-place work vehicle, which can reduce the execution frequency of authentication during work.SOLUTION: When a power cut-off operation is carried out by an upper power source switch 81 to turn off power, and then a power input operation is carried out by the upper power source switch 81 to turn on power, if the power-off and power-on operations are carried out in a state where a lifting device 20 is not stored, authentication appropriate information based on a last authentication result is maintained, and an operation permissible state is set without carrying out authentication again. On the other hand, if the power-off and power-on operations are carried out in a state where the lifting device 20 is stored, the authentication appropriate information based on the last authentication result is cleared, and authentication is carried out again.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an authentication system for aerial work platforms equipped with a lifting device that can be raised and lowered. [Background technology]

[0002] A vehicle for working at height is configured with a running body that can travel, a lifting device that is mounted on the running body and can be raised and lowered, and a work platform supported by the lifting device. The running body of such a vehicle for working at height can be configured as a truck-based vehicle, or as a self-propelled vehicle equipped with wheels or a crawler mechanism. The lifting device can also be configured as a boom type that can rotate, raise and lower, and extend, or as a vertical lifting type equipped with a scissor link mechanism or an extendable post. Various vehicles for working at height that combine these running body and lifting device configurations are known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-189534 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to prevent unauthorized use or theft of aerial work platforms, authentication systems for aerial work platforms are known that perform authentication to determine whether a worker attempting to operate the platform or lifting device is an appropriate person, such as having the necessary qualifications. For example, such authentication systems require the presentation of predetermined authentication information, such as a password, when an operation to start the operation of the platform or lifting device (for example, an operation to turn on the power using a power switch that turns the vehicle's power on and off) is performed, and permit the operation of the platform or lifting device if the authentication information is appropriate (for example, if the entered password matches a pre-registered password).

[0005] In a vehicle for working at height, after the work platform is moved to a predetermined work position by the lifting device, an operation stop operation (for example, an operation to turn off the power using a power switch) is performed to stop the operation of the lifting device, etc., in order to prevent erroneous operation of the lifting device or the traveling body, and work is then performed with the operation of the lifting device, etc. stopped. Then, when work at that work position is completed, an operation start operation is performed again to move the work platform to another position. In this way, in a vehicle for working at height, the operation start operation and the operation stop operation are often performed alternately and repeatedly during work.

[0006] However, in conventional authentication systems for such aerial work platforms, authentication is performed by requiring the operator to present authentication information each time an operation is started. This means that the operator has to perform the authentication operation (presentation of authentication information) multiple times during work, which is troublesome and reduces work efficiency.

[0007] The present invention has been made in view of the above-mentioned problems, and has an object to provide an authentication system for an aerial work vehicle that can reduce the number of times authentication is performed during work. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a traveling body operable to travel, a lifting device provided on the traveling body operable to lift up and down, a workbench supported by the lifting device, and a workbench including: and an authentication control device that performs an operation start operation to start the lifting device and an operation stop operation to stop the operation of the lifting device when the operation start operation is performed by the operation operation device, and that performs authentication based on predetermined authentication information when the operation start operation is performed by the operation operation device, and permits operation of the lifting device if the authentication information is correct. The authentication system of a first aspect of the present invention also includes a storage detection device (e.g., storage detection unit 56 in the first embodiment) that detects whether the lifting device is in a stored state, and the authentication control device is configured to, when the operation of the lifting device is permitted based on the authentication result, if the operation stop operation is performed by the operation operation device to stop the operation of the lifting device, and then an operation start operation is performed by the operation operation device, maintain the authentication result and permit operation of the lifting device without performing the authentication again, based on the detection result of the storage detection device, if the lifting device is not in a stored state, and clear the authentication result and perform the authentication again if the lifting device is in a stored state.

[0009] Furthermore, the authentication system of the second aspect of the present invention includes a posture detection device (e.g., posture detection unit 156 in the second embodiment) that detects whether the lifting device is in a predetermined posture, and the authentication control device is configured to, when the operation of the lifting device is permitted based on the result of the authentication, if the operation stop operation is performed by the operation operation device to stop the operation of the lifting device, and then the operation start operation is performed by the operation operation device, maintain the authentication result and permit the operation of the lifting device without performing the authentication again, based on the detection result by the posture detection device, and when the lifting device is in the predetermined posture, clear the authentication result and perform the authentication again.

[0010] Furthermore, the authentication system of a third aspect of the present invention is equipped with a boarding detection device (for example, boarding detection unit 57, 157 in the embodiments) that detects whether or not a worker is on the work platform, and the authentication control device is configured to, when the operation of the lifting device is permitted based on the result of the authentication, and the operation stop operation is performed by the operation operating device to stop the operation of the lifting device, and then the operation start operation is performed by the operation operating device, if a worker is on the work platform at both the time the operation stop operation is performed by the operation operating device and the time the next operation start operation is performed, based on the detection result by the boarding detection device, maintain the authentication result and permit the operation of the lifting device without performing the authentication again, and if a worker is not on the work platform at least at the time the operation stop operation is performed by the operation operating device and the time the next operation start operation is performed, clear the authentication result and perform the authentication again.

[0011] In addition, in a fourth aspect of the authentication system according to the present invention, the activation operation device is configured to have an upper activation operation device provided on the work platform and a lower activation operation device provided on the running body, and the authentication control device is configured to maintain the authentication result and allow the operation of the lifting device without performing the authentication again if, in a situation where the operation of the lifting device is permitted based on the result of the authentication, the operation stop operation is performed by the upper activation operation device to stop the operation of the lifting device, and then the operation start operation is performed by the upper activation operation device, clear the authentication result and perform the authentication again if the operation stop operation is performed by the lower activation operation device to stop the operation of the lifting device, and then the operation start operation is performed by the lower activation operation device.

[0012] In the authentication system of the second aspect, the predetermined position is preferably a position in which a worker can get on and off the work platform. Also, in the authentication system of the first or second aspect, the actuation operation device is preferably an upper actuation operation device provided on the work platform. Also, in the authentication system of the third aspect, the actuation operation device is preferably a lower actuation operation device provided on the traveling body. [Effects of the Invention]

[0013] In the authentication system of the first aspect of the present invention, when the operation of the lifting device is permitted based on the authentication result, if the operation stop operation is performed using the operation operating device to stop the operation of the lifting device, and then the operation start operation is performed using the operation operating device again, if the lifting device is not in the stored state, the authentication result is maintained and operation of the lifting device is permitted without performing authentication again. Since the lifting device is not in the stored state often means that work is being done, the authentication system of the first aspect can reduce the number of authentications performed during work. On the other hand, in the above case, if the lifting device is in the stored state, the authentication system of the first aspect clears the authentication result and performs authentication again, thereby preventing the lifting device in the stored state from being used without authorization.

[0014] In the authentication system of the second aspect of the present invention, when the operation of the lifting device is permitted based on the authentication result, if the operation stop operation is performed using the operation operating device to stop the operation of the lifting device, and then the operation start operation is performed using the operation operating device again, if the lifting device is not in the predetermined position, the authentication result is maintained and operation of the lifting device is permitted without performing authentication again. By setting a position that is not expected to be used during work, such as a stored position or a position in which a worker can get on or off the work platform, as the predetermined position, the authentication system of the second aspect can reduce the number of authentications performed during work. On the other hand, in the authentication system of the second aspect, if the lifting device is in the predetermined position in the above case, the authentication result is cleared and authentication is performed again, thereby preventing unauthorized use of the lifting device in the predetermined position.

[0015] In the authentication system of the third aspect of the present invention, when the operation of the lifting device is permitted based on the authentication result, the operation stop operation is performed by the operation operating device to stop the operation of the lifting device, and then the operation start operation is performed by the operation operating device, if a worker is on the work platform both at the time the operation stop operation is performed by the operation operating device and at the time the next operation start operation is performed, the authentication result is maintained and operation of the lifting device is permitted without performing another authentication. Since the presence of a worker on the work platform often means that work is being performed, the authentication system of the third aspect can reduce the number of authentications performed during work. On the other hand, in the above case, if a worker is not on the work platform at least at the time the operation stop operation is performed by the operation operating device and at the time the next operation start operation is performed, the authentication result is cleared and authentication is performed again, thereby preventing unauthorized use of a lifting device without a worker on the work platform.

[0016] In the authentication system of a fourth aspect of the present invention, in a situation where operation of the lifting device is permitted based on the authentication result, if an operation stop operation is performed using the upper operation control device to stop the operation of the lifting device, and then an operation start operation is performed using the upper operation control device, the authentication result is maintained and operation of the lifting device is permitted without performing authentication again. Since operation stop operations and operation start operations using the upper operation control device often occur during work, the authentication system of the fourth aspect can reduce the number of authentications performed during work. On the other hand, in the authentication system of the fourth aspect, in the above situation, if an operation stop operation is performed using the lower operation control device to stop the operation of the lifting device, and then an operation start operation is performed using the lower operation control device, the authentication result is cleared and authentication is performed again. Since operation stop operations and operation start operations using the lower operation control device often occur after work has been completed, the authentication system of the fourth aspect can prevent the lifting device from being used without authorization after work has been completed. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view of a vertical lifting type aerial work platform equipped with an authentication system according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing an operation control configuration of the vertical lifting type aerial work platform. [Figure 3] FIG. 2 is a block diagram showing a configuration of the authentication system according to the first embodiment. [Figure 4] FIG. 10 is a side view of a boom type aerial work platform equipped with an authentication system according to a second embodiment of the present invention. [Figure 5] FIG. 2 is a block diagram showing an operation control configuration of the boom type aerial work vehicle. [Figure 6] FIG. 10 is a block diagram showing a configuration of an authentication system according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A self-propelled vertical lifting vehicle for aerial work equipped with an authentication system according to a first embodiment of the present invention is shown in Fig. 1. This vehicle for aerial work 1 is configured with a running body 10 having four tires and wheels 11 provided at the front, rear, left and right, a lifting device 20 provided on the running body 10, and a work platform 30 supported by the lifting device 20.

[0019] The running vehicle 10 has left and right travel motors 12a, 12b (see FIG. 2) that respectively rotate and drive a pair of left and right front wheels 11a, 11b of the tire-wheel 11, a steering mechanism (not shown) that connects the left and right front wheels 11a, 11b, and a steering cylinder 17 (see FIG. 2) that drives the steering mechanism to change the steering angle of the left and right front wheels 11a, 11b (the deflection angle with respect to the front-to-rear center axis of the running vehicle 10). The pair of left and right rear wheels 11c, 11d of the tire-wheel 11 are non-driven wheels connected by an axle. The running vehicle 10 is configured to be able to run in a desired direction by rotating and driving the left and right front wheels 11a, 11b with the left and right travel motors 12a, 12b and changing the steering angle of the left and right front wheels 11a, 11b with the steering cylinder 17. The left and right front wheels 11a, 11b may be steered wheels, and the left and right rear wheels 11c, 11d may be driven wheels by a traction motor.

[0020] The lifting device 20 is configured by a scissors link mechanism in which two X-shaped link members 20a are arranged side by side in the left-right direction of the running body 10, and the central parts of the two link members 20a are connected by a first pivot rod 20b, and these are further arranged side by side in three stages in the vertical direction and each stage is pivotally connected by a second pivot rod 20c, and a lifting cylinder 21 is installed between this scissors link mechanism and the running body 10.

[0021] The lowermost link member 20a constituting the scissors link mechanism has its lower end located in front of the running body 10 pivotally connected to the upper part of the running body 10, and its lower end located in the rear side is provided with a roller 20e that rolls on a rail provided on the upper part of the running body 10. The uppermost link member 20a constituting the scissors link mechanism has its upper end located in front of the running body 10 pivotally connected to the lower part of the work platform 30, and its upper end located in the rear side is provided with a roller 20f that rolls on a rail provided on the lower part of the work platform 30. The lifting device 20 is configured so that the scissors link mechanism can be extended and retracted in the vertical direction by extending and retracting the lifting cylinder 21, thereby lifting and lowering the work platform 30 in the vertical direction.

[0022] The work platform 30 has a work floor 31 on which a worker can board, handrails 32 erected at the front, rear, left, and right ends of the work floor 31, and an operating device 40 provided on the top of the front handrail 32. As shown in Fig. 2, the operating device 40 has a travel operation lever 41 for starting and stopping the running body 10 and for operating the running body 10 to travel forward and backward, a steering dial 42 for operating the steering of the running body 10 (for steering the left and right front wheels 11a, 11b which are the steering wheels), and a lift operation lever 43 for operating the raising and lowering of the work platform 30. The vehicle for aerial work 1 is configured so that a worker on the work platform 30 can operate the travel operation lever 41, the steering dial 42, and the lift operation lever 43 to cause the running body 10 to travel and the work platform 30 to rise and lower, thereby moving to a desired work position.

[0023] The travel control lever 41 is positioned in a neutral position in a vertical position when not in operation, and is configured to be tiltable forward and backward relative to this neutral position. The operating state of the travel control lever 41 (the direction and amount of operation relative to the neutral position) is detected by a travel control detector 41a, such as a potentiometer, provided in the operating device 40, and the detection signal is input to the controller 50. Tilting the travel control lever 41 forward corresponds to a command to drive the vehicle 10 forward, and the greater the amount of tilt operation, the greater the target speed for forward travel set in the controller 50. Tilting the travel control lever 41 backward corresponds to a command to drive the vehicle 10 backward, and the greater the amount of tilt operation, the greater the target speed for reverse travel set in the controller 50. Returning the travel control lever 41 to the neutral position corresponds to a command to stop the vehicle 10.

[0024] When not in operation, the steering dial 42 is located in a neutral position (as shown in FIG. 2, a position where the mark on the steering dial 42 and the mark on the surface of the operation device 40 are aligned), and is configured to be able to be twisted to the right (clockwise) and left (counterclockwise) with respect to this neutral position. The operation state of the steering dial 42 (the direction and amount of operation with respect to the neutral position) is detected by a steering operation detector 42a, such as a potentiometer, provided in the operation device 40, and the detection signal is input to the controller 50. Twisting the steering dial 42 to the right corresponds to a command to steer the front wheels 11a, 11b to the right, and the greater the amount of twisting, the greater the value of the target steering angle to the right set in the controller 50. A counterclockwise twist of the steering dial 42 corresponds to a command to steer the front wheels 11a, 11b to the left, and the greater the amount of twist, the greater the target steering angle to the left set in the controller 50. An operation to return the steering dial 42 to the neutral position corresponds to a command to set the steering angle of the front wheels 11a, 11b to zero (a straight-ahead driving command for the vehicle 10).

[0025] The lift control lever 43 is positioned in a neutral position in a vertical position when not in operation, and is configured to be tiltable forward and backward with this neutral position as the reference. The operation state of the lift control lever 43 (the direction and amount of operation with the neutral position as the reference) is detected by a lift control operation detector 43a formed of a potentiometer or the like provided in the operation device 40, and the detection signal is input to the controller 50. Tilting the lift control lever 43 forward from the neutral position corresponds to a command to lower the work platform 30, and tilting it backward from the neutral position corresponds to a command to raise the work platform 30. Returning the lift control lever 43 to the neutral position corresponds to a command to stop the work platform 30.

[0026] The traveling vehicle 10 is provided with a battery B and an inverter IV that converts DC power from the battery B into AC power and supplies it to the left and right traveling motors 12a, 12b. The inverter control section 51 of the controller 50 supplies power to the left and right traveling motors 12a, 12b via the inverter IV so that the left and right traveling motors 12a, 12b rotate in a direction and at a speed that corresponds to the operating state of the travel operation lever 41, thereby controlling the left and right traveling motors 12a, 12b to rotate.

[0027] Furthermore, the traveling vehicle 10 is equipped with a pump drive motor MT that is rotationally driven by power from a battery B, a hydraulic pump P that is driven by the pump drive motor MT, a hydraulic oil tank T, a steering control valve 71 that switches the supply direction of hydraulic oil to the steering cylinder 17, and a lift control valve 72 that switches the supply direction (including whether or not to supply) of hydraulic oil to the lift cylinder 21. The pump drive motor MT is rotationally driven only when the work platform 30 is raised using the lift operation lever 43 and when steering is performed using the steering dial 42. Hydraulic oil discharged from the hydraulic pump P is supplied to the steering cylinder 17 via the steering control valve 71, and to the lift cylinder 21 via the lift control valve 72.

[0028] The steering control section 52 of the controller 50 is configured to electromagnetically drive the spool of the steering control valve 71 in response to operation of the steering dial 42, thereby switching the direction of supply of hydraulic oil to the steering cylinder 17, and to extend and retract the steering cylinder 17 to change the steering angle of the left and right front wheels 11a, 11b. The lift control section 53 of the controller 50 is configured to electromagnetically drive the spool of the lift control valve 72 in response to operation of the lift operation lever 43, thereby switching the direction of supply of hydraulic oil to the lift cylinder 21, and to extend and retract the lift cylinder 21 to control the lifting device 20 to move the work platform 30 up and down.

[0029] The lifting device 20 is equipped with a lifting position detector 61 that detects the lifting position (height position) of the work platform 30 from the extension amount of the lifting cylinder 21. Information on the lifting position of the work platform 30 detected by the lifting position detector 61 is input to the lifting control section 53 of the controller 50. Note that the lifting position detector 61 may be configured to detect the lifting position of the work platform 30 from the extension amount of the lifting cylinder 21, or may be configured with an optical or ultrasonic reflective distance sensor to detect the lifting position of the work platform 30. Also, the height of the work platform 30 may be calculated by detecting the angle of the scissor link.

[0030] The vehicle for aerial work 1 configured in this manner is equipped with an authentication system that performs authentication to determine whether a worker attempting to operate the traveling body 10 or the lifting device 20 is a qualified person, in order to prevent the vehicle for aerial work 1 from being used without permission or being stolen. This authentication system will be described with additional reference to Figure 3.

[0031] 3, this authentication system is mainly composed of an upper power switch 81, an upper authentication operator 82, a lower power switch 83, a lower authentication operator 84, a lift position detector 61, a worker detector 85, and a controller 50 (particularly, an authentication control unit 55, a storage detection unit 56, and a boarding detection unit 57). The upper power switch 81 and the upper authentication operator 82 are provided on the work platform 30 (e.g., the operation device 40), and the lower power switch 83 and the lower authentication operator 84 are provided on the traveling vehicle 10. Note that a lower operation device (not shown) having a lower traveling operation lever (not shown) configured similarly to the traveling operation lever 41, a lower steering dial (not shown) configured similarly to the steering dial 42, and a lower lifting operation lever (not shown) configured similarly to the lifting operation lever 43 may be provided on the traveling vehicle 10, and the lower power switch 83 and the lower authentication operator 84 may be provided on the lower operation device.

[0032] The upper power switch 81 is formed, for example, in the shape of a button, and is configured to perform a power-on operation (corresponding to an upper operation start operation) by pressing it to turn on the power, and a power-off operation (corresponding to an upper operation stop operation) by pressing it to turn off the power. When the power-on operation is performed with the upper power switch 81, power is supplied to the controller 50 from a predetermined power source (for example, battery B, but a different battery may also be used), and the controller 50 enters a power-on state. When the controller 50 enters a power-on state, the traveling body 10 and the lifting device 20 enter a state in which they can start operating. On the other hand, when the power-off operation is performed with the upper power switch 81, the power supply to the controller 50 is cut off, and the controller 50 enters a power-off state. When the controller 50 enters a power-off state, the traveling body 10 and the lifting device 20 enter a state in which they cannot operate.

[0033] The lower power switch 83 can be rotated, for example, by inserting a predetermined key, and is configured to perform a power-on operation (corresponding to a lower operation start operation) by rotating it from a reference position to a predetermined rotation position to turn on the power, and a power-off operation (corresponding to a lower operation stop operation) by returning it to the reference position to turn off the power. The lower power switch 83 operates in the same way as the upper power switch 81 when it is powered on or off. Generally, the lower power switch 83 is powered on when work starts and powered off when work ends. Also, the upper power switch 81 operates in the same way as the lower power switch 83 when it is powered on. Unless the device is in the configured state, it cannot be operated effectively (the power cannot be turned on or off even if it is operated).

[0034] The upper authentication operator 82 is configured to include, for example, a numeric keypad input operation unit for inputting a predetermined password (for example, consisting of a multi-digit number), and outputs an authentication operation signal corresponding to the input password to the controller 50. The lower authentication operator 84 has the same configuration and function as the upper authentication operator 82. Note that the authentication operation (password input) is first requested when the power is turned on using the lower power switch 83 to start work. This request is made, for example, by turning on a predetermined lamp or outputting a sound.

[0035] The worker detector 85 is configured by, for example, an optical or ultrasonic reflection sensor installed on the work platform 30. This worker detector 85 detects whether or not a worker is on the work platform 30, and outputs a detection signal to the controller 50. Note that a load sensor that detects the load acting on the work platform 30 may also be used as the worker detector 85.

[0036] The authentication control unit 55 of the controller 50 detects the input password via an authentication operation signal from the upper authentication operation device 82 or the lower authentication operation device 84 and performs authentication to determine whether the password matches a pre-registered valid password. If the input password matches the valid password, information indicating that the authentication is valid is stored and operation of the traveling vehicle 10 and the lifting device 20 is permitted. That is, operation of the right traveling motor 12a and the left traveling motor 12b is permitted depending on the operation state of the traveling operation lever 41, operation of the steering cylinder 17 is permitted depending on the operation state of the steering dial 42, and operation of the lifting cylinder 21 is permitted depending on the operation state of the lifting operation lever 43. Hereinafter, a state in which operation of the traveling vehicle 10 and the lifting device 20 is permitted as a result of authentication is referred to as an operation permitted state. In the operation permitted state, information indicating that the authentication is valid (also referred to as authentication validity information) is stored.

[0037] On the other hand, if the entered password does not match the correct password, the authentication control unit 55 does not permit the running vehicle 10 and the lifting device 20 to operate. That is, the operation of the steering cylinder 17 is restricted regardless of the operating state of the travel operation lever 41, the operation of the steering cylinder 17 is restricted regardless of the operating state of the steering dial 42, and the operation of the lifting cylinder 21 is restricted regardless of the operating state of the lifting operation lever 43.

[0038] The storage detection unit 56 of the controller 50 detects whether the lifting device 20 is stored or not based on the detection signal from the lifting position detector 61. Specifically, when the detection signal from the lifting position detector 61 indicates that the lifting position of the workbench 30 is at the lowest position, it detects that the lifting device 20 is stored. This storage detection is performed sequentially, and the information on whether the lifting device is stored or not is updated and stored each time.

[0039] The boarding detection unit 57 of the controller 50 detects whether or not a worker is on the work platform 30 based on the detection signal from the worker detector 85. Specifically, when the detection signal from the worker detector 85 indicates that a worker is present, it detects that a worker is on the work platform 30. This boarding detection is performed sequentially, and the information on whether or not a worker is on the work platform 30 is updated and stored each time.

[0040] In conventional authentication systems, authentication is performed every time the power is turned on. In contrast, in the authentication system of this embodiment, if a predetermined condition is met, the previous authentication result (authentication suitability information) is maintained and no new authentication is performed. However, if another certain condition is met, the previous authentication result is maintained and no new authentication is performed. The authentication result (authentication suitability information) is cleared and authentication is performed again. This point will be explained below with specific examples.

[0041] As a first example, in the operation permitted state, if the upper power switch 81 is operated to turn off the power and then the upper power switch 81 is operated to turn on the power (also referred to as the first case), when these power-off and power-on operations are performed when the lifting device 20 is not stored, the authentication appropriateness information based on the previous authentication result is maintained, and the operation permitted state is established without performing new authentication. On the other hand, in the first case, when these power-off and power-on operations are performed when the lifting device 20 is stored, the authentication appropriateness information based on the previous authentication result is cleared, and new authentication is performed. Note that a certain time delay may be set between meeting the conditions for clearing the authentication appropriateness information based on the previous authentication result (also referred to as the "previous authentication appropriateness information") and actually executing the clearing process. For example, when the upper power switch 81 is operated to turn off the power while the lifting device 20 is stored, an off-delay operation may be set to maintain the previous authentication appropriateness information until a predetermined time (e.g., any time between 1 and 2 minutes) has elapsed, and clear it after the predetermined time has elapsed. In this case, if the power is turned on using the upper power switch 81 before the predetermined time has elapsed, the operation may be permitted without requiring authentication again.

[0042] When the upper power switch 81 is operated to turn the power off or on while the lifting device 20 is not in the stored state, this often means that work is in progress (for example, an operator on the work platform 30 temporarily turns the power off to prevent erroneous operation of an operating lever, etc.), so the first example makes it possible to reduce the number of times authentication is performed during work. On the other hand, when the upper power switch 81 is operated to turn the power off or on while the lifting device 20 is in the stored state, this often means that the operator has temporarily left the work platform 30 (aerial work vehicle 1). Therefore, the first example makes it possible to prevent unauthorized use of the traveling body 10 and the lifting device 20 when the operator is away from the work platform 30. Note that, as a variation of the first example, the authentication appropriateness information based on the previous authentication result may be maintained regardless of whether the lifting device 20 is in the stored state, and the operation may be permitted without performing authentication again.

[0043] As a second example, in the operation permitted state, if the power is turned off by the lower power switch 83, and then the power is turned on by the lower power switch 83 to return to the power on state (second case), the authentication appropriateness information based on the previous authentication result is cleared, and authentication is performed again. In this second example, too, a certain delay may be provided between the satisfaction of the conditions for clearing the previous authentication appropriateness information and the actual execution of the clearing process. For example, when the power is turned off by the lower power switch 83, an off-delay operation may be set in which the previous authentication appropriateness information is maintained until a predetermined time has elapsed, and then cleared after the predetermined time has elapsed. In this case, if the power is turned on by the lower power switch 83 before the predetermined time has elapsed, the operation permitted state may be established without performing new authentication.

[0044] The power-off and power-on operations using the lower power switch 83 may occur when the worker is away from the work platform 30 (aerial work vehicle 1), such as after work has been completed. Therefore, according to the second example, the running body 10 and the lifting device 20 can be prevented from being used without permission in situations such as after work has been completed.

[0045] As a third example (modification), in the operation permitted state, the power is turned off by a power-off operation (whether by the upper power switch 81 or the lower power switch 83), and then the power is turned on by a power-on operation (whether by the upper power switch 81 or the lower power switch 83). In the third case, when a power-on operation is performed (regardless of whether the lifting device is in the stowed state or not), if a worker is on the work platform 30 both at the time the power-off operation is performed and at the time the power-on operation is performed, the previous authentication result is maintained and the operation is permitted without a new authentication. On the other hand, in the third case, if a worker is not on the work platform 30 at least at the time the power-off operation is performed and at the time the power-on operation is performed, the authentication appropriateness information based on the previous authentication result is cleared and a new authentication is performed. Even in this third example, a certain delay may be set between meeting the conditions for clearing the previous authentication appropriateness information and actually executing the clearing process. For example, if a power-off operation is performed using the lower power switch 83 when no worker is on the work platform 30, an off-delay operation may be set in which the previous authentication appropriateness information is maintained until a predetermined time has elapsed and then cleared after the predetermined time has elapsed. In this case, if a power-on operation is performed using the lower power switch 83 before the predetermined time has elapsed, the operation may be permitted without a new authentication.

[0046] Since the presence of a worker on the work platform 30 often means that work is in progress, the third example makes it possible to reduce the number of times authentication is performed during work. On the other hand, the absence of a worker on the work platform 30 may mean that the worker is away from the work platform 30 (aerial work vehicle 1), so the third example makes it possible to prevent the traveling body 10 and the lifting device 20 from being used without permission when the worker is away from the work platform 30.

[0047] Next, a second embodiment of the present invention will be described. Figures 4 and 5 show a self-propelled telescopic boom aerial work vehicle equipped with an authentication system according to the second embodiment of the present invention. This aerial work vehicle 101 is configured to include a traveling body 110 that is configured to be able to travel, a rotating body 120 that is provided above the traveling body 110 and can rotate horizontally, a boom 130 that is provided above the rotating body 120 and can be raised and lowered, and a work platform 140 provided at the tip of the boom 130. The rotating body 120 and the boom 130 form a lifting device.

[0048] The running vehicle 110 has a pair of left and right front wheels 112 and rear wheels 113 rotatably mounted on a running vehicle frame 111. The running vehicle 110 has two front-wheel traveling motors 116 that rotate and drive the left and right front wheels 112, respectively, and two rear-wheel traveling motors 117 that rotate and drive the left and right rear wheels 113, respectively. The running vehicle 110 is configured to rotate and drive the left and right front wheels 12 and rear wheels 13, respectively, using the front-wheel and rear-wheel traveling motors 116, 117, and to travel in a desired direction by steering these front wheels 12 and rear wheels 13, respectively. Note that the left and right front wheels 112 may be steered wheels, and the left and right rear wheels 113 may be driven wheels driven by the traveling motors.

[0049] A swivel mechanism 115 is provided at the center of the upper part of the running body frame 111. The swivel mechanism 115 has an outer wheel fixed to the running body frame 111, an inner wheel fixed to the rotating body 120 and engaged with the outer wheel, a swivel motor 126 provided on the rotating body 120, and a rotary center joint for supplying hydraulic oil from a hydraulic pump P provided on the rotating body 120 to front-wheel and rear-wheel travel motors 116, 117 and the like provided on the running body 110. The swivel body 120 is attached to the running body frame 111 by the swivel mechanism 115 so as to be able to swivel horizontally, and is configured to be able to swivel left and right relative to the running body 110 by operating the swivel motor 126 in the forward or reverse direction.

[0050] A boom 130 is mounted on the upper part of the revolving body 120 by a pivot pin 134 so as to be able to swing up and down (to be raised and lowered). The boom 130 can be raised and lowered relative to the revolving body 120 by a boom hoisting cylinder 135 mounted between the revolving body 120 and the boom 130. The boom 130 has a base boom 131 pivotally connected to the revolving body 120, and an intermediate boom 132 and a tip boom 133 which are combined with the base boom 131 in a telescopic manner, and can be extended. The boom 130 can be extended and retracted by a boom extension cylinder 136 provided inside the boom 130.

[0051] A vertical post 137 is attached to the tip of the tip boom 133 by a pivot pin so that it can swing up and down. A work platform 140 is attached to the top of the vertical post 137 so that it can swivel (pivot) left and right. An upper leveling cylinder (not shown) is installed between the tip of the tip boom 133 and the vertical post 137. A closed circuit is formed by a hydraulic hose between this upper leveling cylinder and a lower leveling cylinder (not shown) installed between the base boom 131 and the rotating body 120. The upper leveling cylinder extends and retracts in response to the extension and retraction of the lower leveling cylinder, causing the vertical post 137 to swing up and down relative to the tip boom 133, thereby keeping the floor surface of the work platform 140 always horizontal regardless of the angle at which the boom 130 is raised and lowered.

[0052] The work platform 140 is configured to be able to rotate (swing) left and right relative to the vertical post 137 by a swing motor 146 provided on the work platform 140. The work platform 140 has a substantially rectangular work floor 141 on which a worker can stand, and handrails 142 erected around the periphery of the work floor 141. The work platform 140 is provided with an operating device 170 for operating the traveling body 110, operating the boom 130, etc.

[0053] 5, the operation device 170 has a travel operation lever 171 for starting and stopping the travel body 110 and switching between forward and reverse motion, a steering dial 172 for steering the travel body 110 (for steering the front wheels 12 and rear wheels 13), a swing operation lever 174 for swinging the rotating body 120, a boom operation lever 175 for raising and lowering and extending the boom 130, and a swing operation lever 176 for swinging (swinging) the work platform 140. The aerial work vehicle 101 is configured so that an operator gets on the work platform 140 and moves it to a desired work position by operating the travel operation lever 171 and the steering dial 172, etc., and can raise and lower the work platform 140 to a desired high position by operating the swing operation lever 174 and the boom operation lever 175, etc.

[0054] The left and right front wheels 112 and rear wheels 113 and the steering dial 172 are interlocked via a steering device (not shown). The steering device has a front wheel steering mechanism connected to the left and right front wheels 112, a front wheel steering cylinder 192 that drives the front wheel steering mechanism to change the steering angle of the left and right front wheels 112, a rear wheel steering mechanism connected to the left and right rear wheels 113, a rear wheel steering cylinder 194 that drives the rear wheel steering mechanism to change the steering angle of the left and right rear wheels 113, a front wheel steering angle detector 196 that detects the steering angle of the left and right front wheels 112, and a rear wheel steering angle detector 197 that detects the steering angle of the left and right rear wheels 113.

[0055] The vehicle 110 is provided with two front wheel brake cylinders 118 for braking the rotation of the left and right front wheels 112, respectively, and two rear wheel brake cylinders 119 for braking the rotation of the left and right rear wheels 113, respectively.

[0056] The rotating body 120 is provided with a hydraulic unit 180 that serves as a drive source for left and right front wheel travel motors 116, left and right rear wheel travel motors 117, left and right front wheel brake cylinders 118, left and right rear wheel brake cylinders 119, front wheel steering cylinder 192, rear wheel steering cylinder 194, swing motor 126, boom derrick cylinder 135, boom telescopic cylinder 136, and swing motor 146, and supplies hydraulic oil to these hydraulic actuators. The hydraulic unit 180 includes an engine E, a hydraulic pump P driven by the engine E, a hydraulic oil tank T, and a control valve unit 185 that controls the supply direction and amount of hydraulic oil supplied from the hydraulic pump P to each hydraulic actuator. The control valve unit 185 includes a plurality of control valves V1 to V10 that are provided corresponding to each hydraulic actuator.

[0057] The revolving body 120 is provided with a controller 150 to which an operation signal is input from an operation device 170 provided on the work platform 140. When the controller 150 receives an operation signal from the operation device 170, it outputs a command signal corresponding to the operation signal to a control valve unit 185 of the hydraulic unit 180. For example, when an operation signal is input from a swing operation lever 174 of the operation device 170, a command signal corresponding to the tilt operation direction and operation amount of the swing operation lever 174 is output to the swing control valve V7 of the control valve unit 185 to control the spool movement direction and valve opening of the swing control valve V7, and drive the swing motor 126 to rotate the revolving body 120 relative to the traveling body 110.

[0058] When an operation signal is input from the boom operation lever 175, the controller 150 outputs a command signal corresponding to the tilt operation direction and amount of operation of the boom operation lever 175 to the hoist and extension control valves V8, V9 of the control valve unit 185, thereby controlling the spool movement direction and valve opening of the hoist and extension and extension control valves V8, V9, and driving the boom hoist cylinder 135 and the boom telescopic cylinder 36 to hoist and extend the boom 130. In addition, when an operation signal is input from the swing operation lever 176, the controller 150 outputs a command signal corresponding to the tilt operation direction and amount of operation of the swing operation lever 174 to the swing control valve V10 of the control valve unit 185, thereby controlling the spool movement direction and valve opening of the swing control valve V10, and driving the swing motor 146 to swing the work platform 140 relative to the vertical post 37.

[0059] In order to control the operation of the revolving structure 120, the boom 130, and the work platform 140 in this manner, the aerial work vehicle 101 has a revolving angle detector 161 that detects the revolving angle of the revolving structure 120 relative to the running structure 110, a boom hoisting angle detector 162 that detects the hoisting angle of the boom 130 relative to the revolving structure 120, a boom extension amount detector 163 that detects the extension amount of the boom 130, a swing angle detector 164 that detects the swing angle (swing angle) of the work platform 140 relative to the boom 130 (vertical post 137), and an inclination angle detector 165 that detects the inclination angle of the running structure frame 111 relative to the horizontal plane, and detection signals from each of these detectors are input to the controller 150. The controller 150 constantly determines and stores the movement position of the work platform 140 relative to the running structure 110 based on the detection signals from each of these detectors.

[0060] When an operation signal is input from the travel operation lever 171, the controller 150 outputs a command signal corresponding to the operation signal to the front wheel travel control valve V1, rear wheel travel control valve V2, front wheel brake control valve V5, and rear wheel brake control valve V6 of the travel control valve unit 185, thereby controlling the rotational operation of the front wheel travel motors 116, 116 and rear wheel travel motors 117, 117, i.e., the drive of the front wheels 112, 112 and rear wheels 113, 113.

[0061] When a steering signal is input from the steering dial 172, the controller 150 outputs a command signal corresponding to the steering signal to the front wheel steering control valve V3 and the rear wheel steering control valve V4, and operates the front wheel steering cylinder 192 and the rear wheel steering cylinder 194 to steer the front wheels 112, 112 and the rear wheels 113, 113 so that the steering angles detected by the front wheel and rear wheel steering angle detectors 196, 197 become the target steering angles corresponding to the steering signal.

[0062] Next, the authentication system in the aerial work platform 101 will be described with additional reference to Figure 6. As shown in Figure 6, this authentication system is mainly composed of an upper power switch 201, an upper authentication operator 202, a lower power switch 203, a lower authentication operator 204, a rotation angle detector 161, a boom hoisting angle detector 162, a boom extension amount detector 163, a swing angle detector 164, a tilt angle detector 165, a worker detector 205, and a controller 150 (particularly an authentication control unit 155, a storage detection unit 156, and a boarding detection unit 157). Upper power switch The power switch 201 and the upper authentication operator 202 are provided on the work platform 140 (for example, the operation device 170), and the lower power switch 203 and the lower authentication operator 204 are provided on the revolving body 120.

[0063] Like the upper power switch 81 of the first embodiment, the upper power switch 201 is formed, for example, in the shape of a button, and is configured to perform a power-on operation and a power-off operation. When the power-on operation is performed with the upper power switch 201, power is supplied to the controller 150 from a predetermined power source (not shown), the controller 150 enters a power-on state, and the traveling body 110 and the lifting device (the revolving body 120, the boom 130, and the work platform 140) enter a state in which they can start operating. On the other hand, when the power-off operation is performed with the upper power switch 201, the power supply to the controller 150 is cut off, and the controller 150 enters a power-off state, and when the controller 150 enters a power-off state, the traveling body 110 and the lifting device enter a stopped state.

[0064] The lower power switch 203, like the lower power switch 83 of the first embodiment, can be rotated, for example, by inserting a predetermined key, and is configured to perform a power-on operation by rotating from a base position to a predetermined rotation position, and a power-off operation by returning to the base position. The lower power switch 203 operates in the same manner as the upper power switch 201 when it is powered on or off. Generally, the lower power switch 203 is powered on when work begins and powered off when work ends. Furthermore, the upper power switch 201 cannot be effectively operated (it cannot turn the power on or off even if it is operated) unless the lower power switch 203 is powered on.

[0065] Like the upper authentication operator 82 of the first embodiment, the upper authentication operator 202 is configured to include, for example, a numeric keypad input operation unit for inputting a predetermined password, and outputs an authentication operation signal corresponding to the input password to the controller 150. The lower authentication operator 204 has the same configuration and function as the upper authentication operator 202. Note that the authentication operation (password input) is first requested when the power is turned on using the lower power switch 203 to start work.

[0066] The worker detector 205 is configured by, for example, an optical or ultrasonic reflection sensor or a load sensor, and is installed on the workbench 140. The worker detector 205 detects whether or not a worker is standing on the workbench 140, and outputs a detection signal to the controller 150.

[0067] The authentication control unit 155 of the controller 150 detects the input password via an authentication operation signal from the upper authentication operation unit 202 or the lower authentication operation unit 204 and performs authentication to determine whether the password matches a pre-registered correct password. If the input password matches the correct password, authentication correctness information is stored and the traveling platform 110 and the lifting device are permitted to operate. Specifically, the authentication control unit 155 permits the front wheel traveling motor 116 and the rear wheel traveling motor 117 to operate in accordance with the operation state of the travel operation lever 171, and permits the front wheel steering cylinder 192 and the rear wheel steering cylinder 194 to operate in accordance with the operation state of the steering dial 172. The authentication control unit 155 also permits the swing motor 126 to operate in accordance with the operation state of the swing operation lever 174, permits the boom hoisting cylinder 135 and the boom extension cylinder 136 to operate in accordance with the operation state of the boom operation lever 175, and permits the swing motor 146 to operate in accordance with the operation state of the swing operation lever 175.

[0068] On the other hand, if the entered password does not match the correct password, the authentication control unit 155 does not permit the running body 110 and the lifting device to operate. The operation of the front wheel traveling motor 116 and the rear wheel traveling motor 117 is restricted regardless of the operating state of the bar 171, and the operation of the front wheel steering cylinder 192 and the rear wheel steering cylinder 194 is restricted regardless of the operating state of the steering dial 172. In addition, the operation of the boom derrick cylinder 135 and the boom telescopic cylinder 136 is restricted regardless of the operating state of the swing operation lever 174, the operation of the swing motor 126 is restricted regardless of the operating state of the boom operation lever 175, and the operation of the swing motor 146 is restricted regardless of the operating state of the swing operation lever 175.

[0069] The attitude detection unit 156 of the controller 150 detects whether or not the lifting device is in a predetermined attitude based on the detection signals from the rotation angle detector 161, boom hoisting angle detector 162, boom extension detector 163, swing angle detector 164, and tilt angle detector 165. The predetermined attitude is set to an attitude in which an operator can get on and off the work platform 140, such as the stowed attitude when the boom 130 is retracted. This attitude detection is performed sequentially, and information on whether or not the lifting device is in a predetermined attitude is updated and stored each time.

[0070] The boarding detection unit 157 of the controller 150 detects whether or not a worker is on the work platform 140 based on the detection signal from the worker detector 205. Specifically, when the detection signal from the worker detector 205 indicates the presence of a worker, it detects that a worker is on the work platform 140. This boarding detection is performed sequentially, and information on whether or not a worker is on the work platform 140 is updated and stored each time.

[0071] As with the authentication system of the first embodiment, in the authentication system of this embodiment, if a predetermined condition is met, the previous authentication result (authentication suitability information) is maintained and no new authentication is performed, but if another certain condition is met, the previous authentication result (authentication suitability information) is cleared and new authentication is performed. This point will be explained below with specific examples.

[0072] As a basic example, in the operation permitted state, if the upper power switch 201 is operated to turn off the power and then the upper power switch 201 is operated to turn on the power (also referred to as case α), if these power-off and power-on operations are performed when the lifting device is not in a predetermined position, the authentication appropriateness information based on the previous authentication result is maintained, and the operation permitted state is established without performing new authentication. On the other hand, in case α, if these power-off and power-on operations are performed when the lifting device is in a predetermined position, the authentication appropriateness information based on the previous authentication result is cleared, and new authentication is performed. Note that a certain delay may be set between meeting the conditions for clearing the previous authentication appropriateness information and actually executing the clearing process. For example, if the upper power switch 201 is operated to turn off the power while the lifting device is in a predetermined position, the previous authentication appropriateness information may be maintained until a predetermined time (e.g., any time between 1 and 2 minutes) has elapsed, and an off-delay operation may be set to clear it after the predetermined time has elapsed. In this case, if the power is turned on by the upper power switch 201 before the predetermined time has elapsed, the operation may be permitted without requiring authentication again.

[0073] When the upper power switch 201 is operated to turn the power off or on while the lifting device is not in the predetermined position, this often means that work is in progress (for example, an operator on the work platform 140 is temporarily turning the power off to prevent erroneous operation of an operating lever, etc.), so this example makes it possible to reduce the number of times authentication is performed during work. On the other hand, when the upper power switch 201 is operated to turn the power off or on while the lifting device is in the predetermined position, this may mean that the operator has temporarily left the work platform 140 (aerial work platform 101). Therefore, this example makes it possible to prevent unauthorized use of the traveling body 110 and the lifting device when the operator is away from the work platform 140. As a variation, in the case of the above-mentioned α, regardless of whether the lifting device is in the predetermined position or not, the authentication appropriateness information based on the previous authentication result is maintained, and the lifting device is set to an operation permitted state without performing authentication again. You can do this.

[0074] As another example, in the operation permitted state, if the power is turned off by the lower power switch 203, and then the power is turned on by the lower power switch 203 to return to the power on state (also referred to as case β), the authentication suitability information based on the previous authentication result is cleared, and authentication is performed again. In this example, too, a certain delay may be provided between the satisfaction of the conditions for clearing the previous authentication suitability information and the actual execution of the clearing process. For example, when the power is turned off by the lower power switch 203, an off-delay operation may be set in which the previous authentication suitability information is maintained until a predetermined time has elapsed, and then cleared after the predetermined time has elapsed. In this case, if the power is turned on by the lower power switch 203 before the predetermined time has elapsed, the operation permitted state may be established without performing new authentication.

[0075] The power-off and power-on operations using the lower power switch 203 may occur when the worker is away from the work platform 140 (aerial work vehicle 101), such as after work has been completed. Therefore, this example makes it possible to prevent the running body 110 and the lifting device from being used without permission in situations such as after work has been completed.

[0076] In another example (variant), when the power is turned off in the operation permitted state (regardless of whether it is by the upper power switch 201 or the lower power switch 203) and then turned on (regardless of whether it is by the upper power switch 201 or the lower power switch 203) and the power is turned on (also referred to as case γ), regardless of whether the lifting device is in the stored state or not, if an operator is on the work platform 140 at both the time the power is turned off and the time the power is turned on, the result of the previous authentication is maintained and the operation is permitted without re-authentication. On the other hand, in case γ, if an operator is not on the work platform 140 at least at the time the power is turned off and the time the power is turned on, the authentication suitability information based on the previous authentication result is cleared and authentication is performed again. In this other example, too, a certain delay may be provided between the time the condition for clearing the previous authentication suitability information is met and the actual execution of the clearing process. For example, when the power is turned off using the lower power switch 203 while no worker is on the work platform 140, the previous authentication success information may be maintained until a predetermined time has elapsed, and an off-delay operation may be set to clear this information when the predetermined time has elapsed. In this case, if the power is turned on using the lower power switch 203 before the predetermined time has elapsed, the operation may be permitted without requiring a new authentication.

[0077] Since the presence of a worker on the work platform 140 often means that work is in progress, this example makes it possible to reduce the number of times authentication is performed during work. On the other hand, the absence of a worker on the work platform 140 may mean that the worker is away from the work platform 140 (aerial work vehicle 101), so this example makes it possible to prevent the traveling body 110 and the lifting device from being used without permission when the worker is away from the work platform 140.

[0078] Although preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments. For example, in the above-described embodiments, password authentication using a numeric keypad operation input device is exemplified as an authentication method, but the authentication method is not limited to a specific one. Various authentication methods can be used, such as authentication using a contact-type ID card, authentication using a method of reading a barcode or QR code (registered trademark), and authentication using wireless communication such as an electronic key using RFID or a mobile terminal.

[0079] In the first embodiment described above, a scissor-link type vehicle for high altitude work 1 is shown as a vertical lifting vehicle for high altitude work to which the present invention is applied, but the present invention can also be applied to a mast type vehicle for high altitude work. In the second embodiment described above, the telescopic boom vehicle for aerial work 101 is shown as the boom vehicle for aerial work to which the present invention is applied, but the present invention can also be applied to aerial work vehicles with articulating booms. The present invention can also be applied to aerial work vehicles that are not self-propelled. [Explanation of symbols]

[0080] 1,101 aerial work platforms 10,110 running body 20 Lifting device 30,140 Workbench 50,150 Controller 55,155 Authentication control section 56 Storage detection unit 57,157 Boarding detection unit 120 Rotating body 130 Boom 156 Attitude detection unit

Claims

1. a traveling body operable to travel; a lifting device provided on the traveling body so as to be capable of lifting and lowering; a workbench supported by the lifting device; an operation operation device that performs an operation start operation for starting the operation of the lifting device and an operation stop operation for stopping the operation of the lifting device; an authentication control device that authenticates a worker based on predetermined authentication information when an operation start operation is performed by the operation operation device, and permits operation of the lifting device if the authentication information is correct, a storage detection device for detecting whether the lifting device is in a stored state; The authentication control device In a situation where the operation of the lifting device is permitted based on the result of the authentication, if an operation stop operation is performed by the operation operating device to stop the operation of the lifting device, and then an operation start operation is performed by the operation operating device, Based on the detection result by the stored detection device, When the lifting device is not in a stored state, the result of the authentication is maintained and operation of the lifting device is permitted without performing the authentication again; An authentication system for aerial work vehicles, characterized in that when the lifting device is in a stored state, the authentication result is cleared and the authentication is performed again.

2. a traveling body operable to travel; a lifting device provided on the traveling body so as to be capable of lifting and lowering; a workbench supported by the lifting device; an operation operation device that performs an operation start operation for starting the operation of the lifting device and an operation stop operation for stopping the operation of the lifting device; an authentication control device that authenticates a worker based on predetermined authentication information when an operation start operation is performed by the operation operation device, and permits operation of the lifting device if the authentication information is correct, a posture detection device for detecting whether the lifting device is in a predetermined posture; The authentication control device In a situation where the operation of the lifting device is permitted based on the result of the authentication, if an operation stop operation is performed by the operation operating device to stop the operation of the lifting device, and then an operation start operation is performed by the operation operating device, Based on the detection result by the attitude detection device, When the lifting device is not in the predetermined position, the result of the authentication is maintained and operation of the lifting device is permitted without performing the authentication again; An authentication system for a vehicle for working at height, characterized in that when the lifting device is in the predetermined position, the result of the authentication is cleared and the authentication is performed again.

3. a traveling body operable to travel; a lifting device provided on the traveling body so as to be capable of lifting and lowering; a workbench supported by the lifting device; an operation operation device that performs an operation start operation for starting the operation of the lifting device and an operation stop operation for stopping the operation of the lifting device; an authentication control device that authenticates a worker based on predetermined authentication information when an operation start operation is performed by the operation operation device, and permits operation of the lifting device if the authentication information is correct, a boarding detection device for detecting whether or not a worker is on the work platform; The authentication control device In a situation where the operation of the lifting device is permitted based on the result of the authentication, if an operation stop operation is performed by the operation operating device to stop the operation of the lifting device, and then an operation start operation is performed by the operation operating device, Based on the detection result by the boarding detection device, When an operator is on the work platform both at the time of executing the operation stop operation by the operation operation device and at the time of executing the next operation start operation, the result of the authentication is maintained and the operation of the lifting device is permitted without performing the authentication again, An authentication system for aerial work vehicles, characterized in that if a worker is not on the work platform at least at the time when the operation stop operation is performed by the operation operating device and at least at the time when the next operation start operation is performed, the authentication result is cleared and the authentication is performed again.

4. a traveling body operable to travel; a lifting device provided on the traveling body so as to be capable of lifting and lowering; a workbench supported by the lifting device; an operation operation device that performs an operation start operation for starting the operation of the lifting device and an operation stop operation for stopping the operation of the lifting device; an authentication control device that performs authentication based on predetermined authentication information when the operation start operation is performed, and permits operation of the lifting device if the authentication information is valid, The operation device is configured to include an upper operation device provided on the work platform and a lower operation device provided on the traveling body, The authentication control device In a situation where the operation of the lifting device is permitted based on the result of the authentication, When the operation stop operation is performed by the upper operation operating device to stop the operation of the lifting device, and then the operation start operation is performed by the upper operation operating device, the result of the authentication is maintained and the operation of the lifting device is permitted without performing the authentication again, An authentication system for a high-altitude work vehicle, characterized in that when the operation stop operation is performed by the lower operation operating device to stop the operation of the lifting device, and then the operation start operation is performed by the lower operation operating device, the authentication result is cleared and the authentication is performed again.

5. 3. The authentication system for a vehicle for working at height according to claim 2, wherein the predetermined position is a position in which a worker can get on and off the work platform.

6. 6. The authentication system for a vehicle for working at height according to claim 1, wherein the operation device is an upper operation device provided on the work platform.

7. 4. The authentication system for a vehicle for working at height according to claim 3, wherein the operation device is a lower operation device provided on the running body.

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