Work vehicle

Abstract

To provide a work vehicle that makes it easy to properly regulate the functions of work equipment mounted on the work vehicle according to the qualifications possessed by the operator and the conditions at the work site.SOLUTION: A work vehicle comprising an upper operation device 9 and lower operation device 10 which are operated by an operator to operate work equipment on which the work vehicle is mounted, and a control unit 30 that controls the operation of the work equipment in response to the operation of these operation devices. Also included is a card reader 101 for inputting specific operation regulation information that regulates specific operation of the work equipment that operates in response to the operation of the upper operation device 9 and the lower operation device 10. The control unit 30 regulates the specific operation of the work equipment based on the specific operation regulation information input from the card reader 101.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a working vehicle equipped with a working device for performing electrical work, construction work, etc.

Background Art

[0002] The types of work vehicles used when performing electrical work, construction work, etc. are diverse depending on various work devices mounted on the vehicle. For example, in the case of an aerial work platform used for working at high altitudes, as a work device, it is equipped with a work platform on which an operator rides and a lifting device for raising and lowering this work platform. In addition, the work vehicle is also equipped with an operation control device that controls the operation of the work devices mounted on the vehicle according to various operation signals output from operation devices provided on the work platform and the vehicle. For example, in an aerial work platform composed of a turntable that can rotate freely with respect to the vehicle and a boom that can perform pitching, telescoping, etc. with respect to this turntable, and a work platform is swingably attached to the tip of the boom, according to various operation signals output from the operation device, the work control device operates various actuators for operating the turntable, boom, etc., thereby controlling the swinging operation of the turntable, the pitching operation and telescoping operation of the boom, the swinging operation of the work platform, etc.

[0003] By the way, in Japan, when working at a high altitude where the lift exceeds 10 m using an aerial work platform, the operator operating the aerial work platform needs to have completed a prescribed skills training. Therefore, an aerial work platform used by an operator who has not completed the prescribed skills training is mechanically equipped with a boom whose lift of the work platform does not exceed 10 m, or, like the aerial work platform described in Patent Document 1, it is necessary to regulate the pitching angle and extension amount of the boom so that the height of the work platform does not exceed a prescribed regulated height.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, since the lift height of the lifting device is regulated according to the qualifications of the operator, for example, when one aerial work vehicle is used by a qualified owner and a person without qualifications, it is desirable to be able to easily change whether or not to regulate the lift height of the lifting device according to the operator using the aerial work vehicle. Further, not limited to the presence or absence of the operator's qualifications, for example, if the functions of the work device can be restricted according to the skill level of each operator regarding the operation of the work device and the situation at the work site, etc., it will also lead to an improvement in work safety.

[0006] The present invention has been made in view of such problems, and an object thereof is to provide a work vehicle that can easily and appropriately regulate the functions of a work device mounted on the work vehicle according to the qualifications of the operator and the situation at the work site.

Means for Solving the Problems

[0007] To achieve such an object, a work vehicle according to the present invention includes a travelable traveling body, and provided on the traveling body Lifting device (for example, the turntable 4 in the embodiment and boom 5) and an operating device (for example, the upper operating device 9 and the lower operating device 10 in the embodiment) that an operator operates to cause the Lifting device to operate, and an operation control device (for example, the control unit 30 in the embodiment) that controls the operation of the Lifting device according to the operation of the operating device. The work vehicle is provided with an attribute information reading device (for example, the card reader 101 in the embodiment) that reads the attribute information from a storage medium storing the attribute information of the operator, and the Limit lift indicating the upper limit of the lift of the lifting device information (for example, in the embodiment Limit lift data ) that operates according to the operation of the operating device is stored in association with the attribute information LiftA regulation information storage device (for example, the regulation information memory 31 in the embodiment), corresponding to the attribute information read by the attribute information reading device Limit lift regulates the operation of the operation control device according to the information Exceeding the upper limit of the lift of the lifting device thereof Lift A regulating device (for example, the control unit 30 and the regulation information memory 31 in the embodiment).

[0010] In the above work vehicle, in association with the attribute information read by the attribute information reading device, the operation information indicating the operation status of the Lifting device after the start of operation is stored at predetermined time intervals by an operation status storage device (for example, the operation status memory 32 in the embodiment), and an operation information output device (for example, the display 103 in the embodiment) that outputs the operation information stored in the operation status storage device. It is preferable to include

[0011] In the above work vehicle, the Lift input of the information associated with the attribute information to the regulation information storage device is restricted to a specific person, and the information stored in the regulation information storage device is prevented from being changed or deleted by a person other than the specific person. It is preferable to have an information input restriction device (for example, the keyboard 102 and the control unit 30 in the embodiment). Limit lift Lift Limit lift

Advantages of the Invention

[0012] According to the work vehicle according to the present invention, the operation control device controls the operation of the Lifting device provided on the traveling body according to the operation of the operation device, and Lift the regulating device regulates the operation based on the information corresponding to the attribute information of the operator read from the storage medium by the attribute information reading device. Limit lift Based on this, by appropriately setting the information for regulating the operation according to the qualifications owned by the operator, etc., according to the qualifications owned by the operator and the situation at the work site, the Exceeding the upper limit of the lift of the lifting device mounted on the work vehicle Exceeding the upper limit of the lifting device regulates the operation Limit lift Upper limit of the lift of the lifting device ​​​​It becomes easy to appropriately regulate it.

[0015] Also, in the work vehicle described above, in association with the attribute information read by the attribute information reading device, after the start of operation Lifting device An operation status storage device that stores operation information indicating the operation status of at regular intervals, and an operation information output device that outputs the operation information stored in the operation status storage device are preferably provided. As a result, by grasping and analyzing the operation content of the work vehicle at the work site based on the operation information stored in the operation status storage device, it is possible to check whether the work vehicle is being used inappropriately, and when performing the same work at the same work site, it becomes easy to select a work vehicle having a useful function for performing the work more efficiently.

[0016] Furthermore, in the work vehicle described above, Lift The input of information associated with the attribute information to the regulation information storage device is restricted to a specific person, and the information stored in the regulation information storage device by a person other than the specific person Limit lift It is preferably provided with an information input restriction device that prevents the information from being changed or deleted. By doing so, it is possible to reduce the risk of the work vehicle being used or the information being changed by a person other than the specific person, so that inappropriate use of the work vehicle can be prevented. Lift Stored in the regulation information storage device Limit lift Information Limit lift

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Best Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The overall configuration of an aerial work vehicle, which is an embodiment of the work vehicle according to the present invention, will be described with reference to FIG. 1. In the following description, it is assumed that the owner of the aerial work vehicle is a rental company, and the user of the aerial work vehicle is a person registered as a member with the rental company and has entered into a rental contract for the aerial work vehicle (that is, a person permitted by the rental company to use the aerial work vehicle). Further, it is assumed that a non-contact IC card having a memory storing the member number assigned to the person is handed over as a member card to the registered member. FIG. 1(a) shows a top view of the aerial work vehicle, and FIG. 1(b) shows a left side view of the aerial work vehicle. The aerial work vehicle 1 has a driver's cab 2, and a turntable 4 configured to be horizontally rotatable with respect to the vehicle body 3 by the operation of a swivel motor 41 is disposed on the vehicle body of the vehicle body 3 configured to be freely movable. On the upper part of this turntable 4, a boom 5 is pivotally attached so as to be able to move up and down in a vertical plane with respect to the vehicle body 3 by the telescopic operation of a lifting cylinder 42.

[0019] The boom 5 consists of a base boom 5a pivotally attached to the upper end of the slewing platform 4, an intermediate boom 5b, and a tip boom 5c that are sequentially and slidably nested within the base boom 5a. It is attached in a telescopically movable manner by extending and retracting a telescopic cylinder 43 disposed inside the boom 5. At the tip of the tip boom 5c, a vertical post 6 is disposed that always maintains verticality regardless of the pitching angle of the boom 5 by the operation of a leveling cylinder (not shown). Further, by the operation of a swing motor 44 disposed on this vertical post 6, it swings horizontally around the vertical post 6 (A work platform 8 (the work platform is also referred to as a "bucket") is attached so as to be freely swingable (referred to as "swinging"). On the front, rear, left, and right of the vehicle body 3, in order to stably support the vehicle body 3 against the overturning moment that acts on the vehicle body 3 when the boom 5 is raised, lowered, extended, etc. and attempts to overturn the vehicle, jacks 14, 14,... are disposed that are extended based on the jacking-out operation and lift and support the vehicle body 3

[0020] An upper operation device 9 for operating the boom 5 is disposed on the work platform 8. As shown in FIG. 2, the upper operation device 9 is provided with a boom operation lever 91 for operating the boom 5 including the slewing platform 4 and a swing operation switch 92 for operating the swinging of the work platform 8. Thereby, an operator boarding the work platform 8 can slewingly operate the slewing platform 4 by operating the boom operation lever 91, and can raise and lower and telescopically operate the boom 5, and can swing the work platform 8 by operating the swing operation switch 92. Further, the upper operation device 9 is provided with a regulation release switch 93 that can raise the work platform 8 to a height exceeding a limit lift described later. The regulation release switch 93 is a push-button type switch. It is turned on while the button is pushed into a predetermined position against the force of a spring provided inside the switch, and when the pushed button is released, the button returns to its original position by the force of the spring and turns off. Note that, as the regulation release switch 93, instead of a push-button type switch, a toggle switch that automatically returns to the neutral position when the operation is stopped may be used

[0021] While the release switch 93 is turned on by the operator, the boom 5 operates in response to the operation of the boom operation lever 91 of the upper operation device 9, and the work platform 8 can move beyond the restricted lifting height (described later). When the release switch 93 is turned off while the work platform 8 is being raised beyond the restricted lifting height with the release switch 93 turned on, the raising of the work platform 8 stops. Also, in this situation, the work platform 8 cannot be raised with the release switch 93 turned off, but the work platform 8 can be lowered without turning on the release switch 93.

[0022] Returning to FIG. 1, a lower operation device 10 is provided at the rear end of the vehicle body 3. Similar to the upper operation device 9, the lower operation device 10 is provided with a boom operation lever for operating the boom 5 including the slewing platform 4 and a swing operation switch for operating the swing operation of the work platform 8. Thereby, an operator on the ground can control the slewing operation of the slewing platform 4, the raising and lowering operation and the telescoping operation of the boom 5, the swing operation of the work platform 8, etc. from the ground by operating these boom operation levers and swing operation switches. Also, the lower operation device 10 is provided with an input device and an output device (described later) for various data for exchanging information with a control unit 30 described later.

[0023] Next, referring to the functional block diagram shown in FIG. 3, the schematic configuration of each part for performing the operation control of the work vehicle of the present embodiment will be described. The control unit 30 shown in this figure controls the operation of various actuators such as the slewing motor 41, the lifting cylinder 42, the telescoping cylinder 43, and the swing motor 44 described above based on the operation of various operation levers and operation switches provided in the upper operation device 9 or the lower operation device 10. Therefore, operation signals such as the boom operation lever 91, the swing operation switch 92, and the release switch 93 of the upper operation device 9 shown in FIG. 2 are output to the control unit 30. Also, similar operation signals are output to the control unit 30 for the lower operation device 10.

[0024] In the lower operation device 10, as described aboveCon It is provided with a card reader 101 and a keyboard 102 as input devices for various data for communicating with the trolley unit 30, and a display 103 as an output device. The card reader 101 reads predetermined information from a memory built in a contactless IC card and outputs it to the control unit 30. In the present embodiment, the contactless IC card is, for example, a membership card issued by a rental company that rents out the aerial work platform 1, and the card reader 101 reads the membership number stored in the memory of the membership card (contactless IC card) and outputs it to the control unit 30. The keyboard 102 is used to input various data to be stored in a regulation information memory 31 provided in the control unit 30 described later, or to input a password required by the control unit 30 when inputting data into the regulation information memory 31. The display 103 displays the data stored in the regulation information memory 31 output by the control unit 30 according to the operation of the keyboard 102 and a operation status memory 32 described later.

[0025] In the present embodiment, the various actuators described above are operated hydraulically, and electromagnetic proportional control valves are arranged in the hydraulic unit 40 corresponding to the various actuators described above, and the control unit 30 controls the valve opening of the electromagnetic proportional control valves corresponding to the various hydraulic actuators, thereby controlling the operation of the hydraulic actuators 41 to 44.

[0026] The hydraulic unit 40 described above is supplied with hydraulic oil in the hydraulic oil tank T by the hydraulic pump P, and the hydraulic pump P is operated by the driving force of the engine E that drives the vehicle body 3. More specifically, a PTO (Power Take-Off mechanism) is incorporated in the transmission of the engine E, and when the PTO operation lever 15 in the driver's cab 2 is operated from off to on, the mechanism part of the power take-off mechanism PTO operates, and the driving force of the engine E is transmitted from the drive wheels of the vehicle body 3 to the hydraulic pump P. When the PTO operation lever 15 is operated from on to off, the driving force of the engine E is transmitted from the hydraulic pump P to the drive wheels of the vehicle body 3. The on / off signal of the PTO operation lever 15 is output to the control unit 30 together with the on / off signal of the engine key switch 11 provided in the driver's cab 2 for starting / stopping the engine E by the engine key (also referred to as the "ignition key").

[0027] The control unit 30 also receives the detection values from the detection device 20 that detects the attitude of the boom 5, the load on the work platform 8, etc. The detection device 20 includes a turning angle detector 21 that detects the turning angle position of the turntable 4 with respect to the vehicle body 3, an elevation angle detector 22 that detects the elevation angle of the boom 5, an extension amount detector 23 that detects the extension amount of the boom 5, a swing angle detector 24 that detects the swing angle of the work platform 8, a work platform load detector 25 that detects the load on the work platform 8, and an inclination angle detector 26 that detects the forward / backward tilt angle of the aerial work platform 1 with respect to the horizontal plane, etc. And each detection data output from each detector of the detection device 20 is input to the control unit 30.

[0028] Next, referring to FIG. 4, the content of the data stored in the regulation information memory 31 incorporated in the control unit 30 will be described. The regulation information memory 31 stores the above-described member numbers of the rental company and regulation data for regulating the lift of the workbench 8 corresponding to each member number. For example, in the example shown in FIG. 4(a), information on whether or not to regulate the lift of the workbench 8 corresponding to each member number is stored. For example, it is set that member numbers 1 and 2 do not regulate the lift of the workbench 8 (that is, there is no lift regulation). In this case, the workbench 8 can be raised and lowered within the range of the maximum lift of the boom 5. Also, it is set that member numbers 3 and 5 regulate the lift of the workbench 8 (that is, there is lift regulation). In this case, the lift of the workbench 8 is restricted to 10 m or less (that is, below the regulated lift). Also, member number 4 indicates that information on whether or not to regulate the lift is not stored. In this case, even if the member number is input from the card reader 101, the control unit 30 does not perform operation control of the slewing platform 4, the boom 5, the workbench 8, etc. according to the operation signals output from the various operation levers and operation switches.

[0029] Therefore, when the rental company lends out the aerial work platform 1 to a member, it is necessary to store in the regulation information memory 31 information on whether or not to regulate the lift for the member number of that member using the keyboard 102 and the display 103. In the present embodiment, for example, when an administrator of the rental company stores new data in the regulation information memory 31, or when changing or deleting the data stored in the regulation information memory 31, it is configured such that those operations cannot be performed unless a predetermined password is input from the keyboard 102. However, such a configuration is not essential, and it may be configured such that the data in the regulation information memory 31 can be deleted or changed without inputting the password.

[0030] In addition to the presence or absence of lift regulations, each member number is associated with lift limit data indicating the upper limit of the lift (restricted lift). Here, the lift limit data is represented by a numerical value indicating meters. For example, the lift limit data for member number 1 is "12", and the workbench 8 is restricted from being raised or lowered beyond 12 m. Similarly, the lift limit data for member number 3 is "8", and the workbench 8 is restricted from being raised or lowered beyond a lift range of 8 m. Also, when the lift limit data is "0", it means that no lift restriction is set. In this case, the workbench 8 can be raised or lowered within the maximum lift range of the boom 5 (or within the range of the regulation if there is a regulation).

[0031] Note that the restricted lift may be set only within the maximum lift of the boom 5 or within the regulated range if the lift is regulated. For example, if a lift regulation is set for member number 3, even if an attempt is made to set the restricted lift to 12 (i.e., a value exceeding the regulated lift of 10 m), the control unit 30 will not store such lift limit data in the regulation information memory 31.

[0032] The control unit 30 restricts the lift of the workbench 8 calculated based on the elevation angle and the extension amount of the boom 5 output from the elevation angle detector 22 and the extension amount detector 23 of the detection device 20, based on the presence or absence of lift regulation and the restricted lift stored in the regulation information memory 31 (these information are also referred to as "regulation information"). Here, while referring to the schematic diagram shown in FIG. 5, a method for the control unit 30 to restrict the lift of the workbench 8 based on the presence or absence of lift regulation and the restricted lift stored in the regulation information memory 31 will be described.

[0033] The aerial work platform 1 shown in FIG. 5 has a maximum extension amount of the boom 5 of L MAX , a minimum extension amount of the boom 5 of L MIN , a maximum elevation angle of the boom 5 of θ MAX , and a maximum depression angle of the boom 5 of θ MINIt is defined as follows. The maximum elevation angle refers to the angle from the state where the boom 5 is horizontal to the state where it stands upright to the maximum extent, and the maximum depression angle refers to the angle from the state where the boom 5 is horizontal to the state where it lies down to the maximum extent. Therefore, in Fig. 5, the maximum lift of the boom 5 is H MAX (which is 15 m in this embodiment). Also, the maximum working radius with respect to the swivel center axis C of the turntable 4 is R MAX It is. This maximum working radius R MAX is equal to the maximum extension amount L when the elevation angle of the boom 5 is horizontal MAX . In Fig. 5, it is assumed that the swivel center axis C is perpendicular to the ground.

[0034] For example, when the member number read by the card reader 101 is "3", the control unit 30 reads the presence or absence of lift regulation and the restricted lift corresponding to the member number 3 from the regulation information memory 31. As shown in Fig. 4(a), in the regulation information memory 31, there is a lift regulation for the member number 3, and the restricted lift H LIM3 is stored as 8 m. Thereby, the control unit 30 controls the elevation and telescopic operations of the boom 5 so that the lift of the work platform 8 does not exceed 8 m. Specifically, based on the elevation angle of the boom 5 and the extension amount of the boom 5 output from the elevation angle detector 22 and the extension amount detector 23 of the detection device 20, the lift of the work platform 8 is calculated. When the calculated lift reaches 8 m, even if the operator operates the boom operation lever 91 to increase the elevation angle or the extension amount of the boom 5, the control unit 30 does not operate the elevation cylinder 42 or the telescopic cylinder 43 so as not to increase the lift any further.

[0035] Here, when the operator operates the operation lever so as to increase the elevation angle of the boom 5 from the position indicated by the solid line in FIG. 5 for the workbench 8, the control unit 30 operates the undulating cylinder 42 so that the elevation angle of the boom 5 increases, and at the same time operates the telescopic cylinder 43 so that the extension amount of the boom 5 decreases. As shown by the dashed arrow in FIG. 5, the control unit 30 controls the workbench 8 to horizontally move in the direction of the turning center axis C while maintaining a lifting height of 8 m.

[0036] When the operator No. 3 operates the boom 5 in such a state where the operation of the boom 5 is restricted in this way, the allowable movement range of the tip of the boom 5 is the range indicated by the hatching in FIG. 5. However, when the operator operates the boom operation lever 91 while keeping the restriction release switch 93 turned on in a state where the lifting height of the workbench 8 reaches 8 m, the tip of the boom 5 can move beyond the allowable movement range. For example, when the boom 5 is at the position indicated by the solid line in FIG. 5 and the operator operates the boom operation lever 91 to increase the elevation angle or the extension amount of the boom 5 while turning on the restriction release switch 93, the control unit 30 operates the undulating cylinder 42 or the telescopic cylinder 43 according to the operation so that the elevation angle or the extension amount of the boom 5 increases.

[0037] Here, when the tip of the boom 5 is within the allowable movement range and when it is outside the allowable movement range, the control unit 30 controls the operation of the undulating cylinder 42 or the telescopic cylinder 43 so that the moving speed of the workbench 8 is different even if the boom operation lever 93 is operated with the same operation amount. For example, the operation of the undulating cylinder 42 or the telescopic cylinder 43 is controlled so that the moving speed of the workbench 8 is slower when the tip of the boom 5 is moving outside the allowable movement range than when it is moving within the allowable movement range.

[0038] When the tip of the boom 5 moves beyond the allowable movement range and the operator turns off the restriction release switch 93, the control unit 30 stops the operation of the elevation cylinder 42 or the telescopic cylinder 43 and stops the operation of the boom 5 even if the boom operation lever 91 is being operated. At this time, if the operator operates the boom operation lever 91 in the direction of returning the tip of the boom 5 within the allowable movement range (for example, an operation to decrease the elevation angle of the boom 5 or an operation to decrease the extension amount of the boom 5), the control unit 30 controls the operation of the elevation cylinder 42 or the telescopic cylinder 43 according to the operation of the boom operation lever 91 even when the restriction release switch 93 is off.

[0039] Next, when the tip of the boom 5 moves beyond the allowable movement range with the restriction release switch 93 turned on, and as a result, the lift of the work platform 8 reaches the restricted lift H REG (10 m), in this case, even when the restriction release switch 93 is turned on, the control unit 30 restricts the operation of the elevation cylinder 42 or the telescopic cylinder 43 that would result in a further lift. However, if the operator operates the boom operation lever 91 in the direction of returning the tip of the boom 5 within the allowable movement range, the elevation cylinder 42 or the telescopic cylinder 43 is operated according to the operation of the boom operation lever 91. Note that the restriction release switch is not limited to one that releases the above-described restricted lift. For example, a restriction release switch that can release the restriction function may be provided for cases where an abnormality occurs, such as when the aerial work platform cannot be moved unless the restriction function for improving the safety such as preventing the aerial work platform from tipping over is released. As a device for realizing the above-described restriction function, for example, there is an interlock device for the jack boom that restricts the operation of the boom so that it cannot operate without installing a jack and restricts the storage of the jack so that it cannot be stored unless the boom is stored.

[0040] Also, for example, when the membership number read by the card reader 101 is "1", The control unit 30 reads the presence or absence of the lift regulation and the limit lift corresponding to member number 1 from the regulation information memory 31. As shown in Fig. 4(a), in the regulation information memory 31, there is no lift regulation for member number 1, and the limit lift H LIM1 is stored as 12 m. Thereby, the control unit 30 controls the raising / lowering operation and the telescoping operation of the boom 5 so that the lift of the workbench 8 does not exceed 12 m. Here, since the control content when the lift of the workbench 8 does not exceed the limit lift and the control content when it exceeds (and has exceeded) the limit lift are the same as those in the case of member number 3 described above, detailed description is omitted.

[0041] In the example shown in Fig. 4(a), the member number was associated with the presence or absence of the lift regulation and the value of the limit lift. However, for example, as shown in Fig. 4(b), the configuration of the information stored in the regulation information memory 31 may be made simpler. In the example shown in Fig. 4(b), in the regulation information memory 31, regarding the qualification information represented by "0" (indicating that the qualification information has not been input) or "1" (indicating that the qualification information has been input), information indicating that the lift of the workbench 8 is regulated (there is lift regulation) corresponding to "0" is stored, and information indicating that the lift of the workbench 8 is not regulated (there is no lift regulation) corresponding to "1" is stored. Then, the card reader 101 outputs "0" as the qualification information to the control unit 30 in the initial state, and when detecting a skill training completion certificate of a non-contact IC card storing information indicating that a predetermined skill training has been completed, outputs "1" as the qualification information to the control unit 30. Thereby, when "1" is not output as the qualification information from the card reader 101 to the control unit 30 (that is, if the qualification information remains "0"), the control unit 30 limits the lift of the workbench 8 to 10 m or less.

[0042] Next, while restricting the lift of the work platform 8 based on the regulation information stored in the regulation information memory 31, the control unit 30 stores the operating statuses of the slewing platform 4, the boom 5, the work platform 8, the upper operating device 9, the lower operating device 10, etc. during the operation of the aerial work platform 1 in the operating status memory 32 shown in FIG. 3. Here, the content of the operating status data stored in the operating status memory 32 will be described with reference to FIG. 6. First, as shown in FIG. 6(a), the control unit 30 incorporates a clock such as an RTC (Real Time Clock), and when it receives the member number from the card reader 101, it stores the member number, the year, month, day, and time when the member number was received in a predetermined storage area of the operating status memory 32. Here, the year, month, day, and time when the member number was received are stored as the time when the aerial work platform 1 started operating (start time of operation). After receiving the member number from the card reader 101, the control unit 30 sequentially stores various operating status data indicating the operating status in the operating status memory 32 at predetermined time intervals (every 5 seconds in this embodiment) together with the elapsed time since the start of operation. In this embodiment, as shown in FIG. 6(b), 11 types of operating status data from A to K are stored as various operating status data. First, the operating status data A is data indicating the on / off state of the PTO operation lever 15, where "0" indicates that the PTO operation lever 15 is off and "1" indicates that the PTO operation lever 15 is on. The operating status data B is data indicating the load of the work platform 8 output from the load detector 25. The operating status data C is data indicating the telescopic length of the boom 5 output from the extension amount detector 24. The operating status data D is data indicating the elevation angle of the boom 5 output from the elevation angle detector 22. The operating status data E is data indicating the slewing angle of the slewing platform 4 output from the slewing angle detector 21.

[0043] After receiving the member number from the card reader 101, the control unit 30 sequentially stores various operating status data indicating the operating status in the operating status memory 32 at predetermined time intervals (every 5 seconds in this embodiment) together with the elapsed time since the start of operation. In this embodiment, as shown in FIG. 6(b), 11 types of operating status data from A to K are stored as various operating status data. First, the operating status data A is data indicating the on / off state of the PTO operation lever 15, where "0" indicates that the PTO operation lever 15 is off and "1" indicates that the PTO operation lever 15 is on. The operating status data B is data indicating the load of the work platform 8 output from the load detector 25. The operating status data C is data indicating the telescopic length of the boom 5 output from the extension amount detector 24. The operating status data D is data indicating the elevation angle of the boom 5 output from the elevation angle detector 22. The operating status data E is data indicating the slewing angle of the slewing platform 4 output from the slewing angle detector 21.

[0044] The operation status data F is data indicating the lift of the workbench 8 calculated by the control unit 30 based on the telescopic length and the pitching angle of the boom 5. The operation status data G is data indicating the working radius of the boom 5 (the horizontal distance from the center axis C of rotation to the tip of the boom 5) calculated by the control unit 30 based on the telescopic length and the pitching angle of the boom 5. The operation status data H is data indicating the forward / backward tilt angle of the aerial work platform 1 output from the tilt angle detector 26 . The operation status data I is data indicating the presence or absence of a signal output from the upper operation device 9. "0" indicates that no operation signal is output from the upper operation device 9 to the control unit 30, and "1" indicates that some operation signal is output from the upper operation device 9 to the control unit 30. The operation status data J is data indicating the presence or absence of a signal output from the lower operation device 10. "0" indicates that no operation signal is output from the lower operation device 10 to the control unit 30, and "1" indicates that some operation signal is output from the lower operation device 10 to the control unit 30. The operation status data K is data indicating the on / off state of the restriction release switch 93. "0" indicates that the restriction release switch 93 is off, and "1" indicates that the restriction release switch 93 is on

[0045] As described above, as shown in FIG. 6(b), the control unit 30 stores the operation status data A to K in the operation status memory 32 in time series every time 5 seconds elapse after the aerial work platform 1 starts operating. Then, when the engine key switch 11 is turned off, the storage of the operation status data A to K ends, and as shown in FIG. 6(a), the date, month, year, and time at that time are stored as the operation end time in a predetermined storage area of the operation status memory 32

[0046] Various operating status data stored in the operation status memory 32 can be displayed on the display 103 by inputting a predetermined command from the keyboard 102 of the lower operation device 10 to the control unit 30. Further, for example, a USB (Universal Serial Bus) connector may be provided on the lower operation device 10 so that various data stored in the operation status memory 32 can be saved to a USB memory inserted into this USB connector. In this case, an application capable of outputting various operating status data to a monitor or a printer may be installed in the personal computer in advance, and various operating status data stored in the USB memory can be output from the personal computer to the monitor or the printer.

[0047] By analyzing the contents of various operating status data stored in the operation status memory 32, in the future, when performing the same work at a work site similar to the work site where the operation status data is stored, it is possible to determine useful functions for performing the work more efficiently. Here, FIG. 7 shows a table summarizing examples of the analysis of the operation status data. In the table shown in FIG. 7, in the "Type of work vehicle" column, types such as a self-propelled work vehicle and a work vehicle using a truck vehicle (truck-mounted type) are indicated. Here, when "Common" is described in the "Type of work vehicle" column, it means that it is common to all types of work vehicles. In the "Operation status data" column, among the operation status data A to K shown in FIG. 6, the operation status data to be analyzed is indicated. In the "Trend" column, the trend shown by the operation status data to be analyzed is indicated. In the "Analysis result" column, based on the trend shown by the operation status data to be analyzed, what events occurred during the work are indicated. In the "Desirable function" column, when working at the work site where the operation status data was obtained based on the analysis result, what functions it is desirable for the work vehicle to have are described.

[0048] In the case of No.1 in the table of Fig. 7, the operating condition data F and G indicated that while the change in the working radius was significant, the change in the lift was small. In this case, it is presumed that the workbench had a lot of horizontal movement. Therefore, when using an aerial work platform equipped with a boom-type lifting device, it can be said that it is desirable for the aerial work platform to be equipped with a horizontal movement control function for linearly moving the workbench within the horizontal plane. In the case of No.2 in the table of Fig. 7, the operating condition data F and G indicated that while the change in the lift was significant, the change in the working radius was small. In this case, it is presumed that the workbench had a lot of vertical movement. Therefore, when using an aerial work platform equipped with a boom-type lifting device, it can be said that it is desirable for the aerial work platform to be equipped with a vertical movement control function for linearly moving the workbench within the vertical plane.

[0049] In the case of No.3 in the table of Fig. 7, it was a case where the changes in the numerical values of the operating condition data C, D, and E were repetitive. In this case, it is presumed that the workbench frequently moved back and forth in the same place. Therefore, it can be said that it is desirable for the work vehicle to be equipped with a teaching playback function. In the case of No.4 in the table of Fig. 7, during the period when the operating condition data A indicated that the PTO operation lever 15 was on during the operation of the work vehicle, the operating condition data I and J indicated that the output of the operation signals from the upper operating device and the lower operating device was small. In this case, it is presumed that even though the engine E was operating during the work at the work site, the work devices such as the lifting device were not operating much. Therefore, it can be said that it is desirable for the work vehicle to be equipped with an idling stop function.

[0050] No. 5 in the table of FIG. 7 indicates a case where the operating condition data F showed that the lift of the lifting device hardly reached the maximum lift or the specified lift. In this case, it is presumed that it was not necessary to fully raise the lift of the lifting device during operation. Therefore, for example, among the same series of aerial work platforms, it can be said that an aerial work platform with a maximum lift one rank lower is suitable. No. 6 in the table of FIG. 7 indicates a case where the operating condition data F showed that the lift of the lifting device frequently reached the maximum lift or the specified lift. In this case, it is presumed that the lift of the lifting device was used up to the upper limit during operation. Therefore, for example, among the same series of aerial work platforms, it can be said that an aerial work platform with a maximum lift one rank higher is suitable.

[0051] No. 7 in the table of FIG. 7 indicates a case where the operating condition data B showed that the load on the work platform was close to the upper limit value. In this case, it is presumed that the loading capacity (load) of the work floor was large. Therefore, it can be said that a so-called platform-type aerial work platform equipped with a large work floor with a large loading load is suitable. No. 8 in the table of FIG. 7 indicates a case where the operating condition data A showed that the period during which it was turned on after sunset (judgeable from the operation start time and elapsed time) was longer than during the day. In this case, it is presumed that there are many night-time operations. Therefore, it can be said that an aerial work platform with a battery unit that can switch the drive source of the hydraulic pump P (see FIG. 3) from the engine E to an electric motor as a noise countermeasure is suitable.

[0052] No. 9 in the table of FIG. 7 indicates a case where the operating condition data H showed that the forward tilt angle or the rear tilt angle of the aerial work platform was equal to or greater than a predetermined value (for example, 5 degrees). In this case, it is presumed that the work is frequently carried out on a sloping ground. Therefore, it can be said that an aerial work platform equipped with a so-called front long jack, in which the stroke of the front jack is longer than the stroke of the rear jack provided on the aerial work platform, is suitable. No. 10 in the table of FIG. 7 indicates a case where the operating condition data A showed that the PTO operation lever 15 was frequently turned on / off. In this case, it is presumed that the aerial work platform frequently made short-distance movements. Therefore, it can be said that an aerial work platform equipped with a so-called roller jack is suitable.

[0053] In Table No. 11 of FIG. 7, the operation status data K indicated a case where the on-operation of the regulation release switch had been frequently performed. In this case, it is presumed that the safety functions (for example, an interlock device for a jack boom that restricts the operation of the boom so that it cannot be operated unless a jack is installed, and a working range restricting device that restricts the storage of the jack unless the boom is stored) installed in the aerial work platform for preventing the aerial work platform from tipping over and the like had been frequently released. Therefore, there is a possibility that a third party such as an unqualified person had operated the lifting device, and it is necessary to confirm whether the person who used the aerial work platform had the qualification. In Table No. 12 of FIG. 7, the operation status data B indicated a case where an excessive load had been detected in front of, on the side of, above, or below the work platform. In this case, it is presumed that an abnormal impact had been applied to the work platform, or that the work platform had been pressed against a wall surface or the like that was the work target, resulting in a situation that is unlikely to occur during normal operation. Therefore, there is a possibility that a third party such as an unqualified person had operated the lifting device, and it is necessary to confirm whether the person who used the aerial work platform had the qualification. In Table No. 13 of FIG. 7, according to the operation status data I and K, the frequency of outputting an operation signal from the lower operation device was higher than that from the upper operation device. In this case, since the operation of the lifting device by the lower operation device was frequent, it is presumed that a plurality of workers had been working. Therefore, for example, when an aerial work platform rented by a rental company to its member had stored such operation status data, the rental company could propose to rent out the aerial work platform together with an operator of the lifting device for the purpose of reducing labor costs when the member next performs a similar operation.

[0054] ​Note that the work equipment mounted on the work vehicle is not limited to the lifting device, and may be, for example, a hole-digging device for hole-digging and parking or a crane device of a crane truck. In this case, when information indicating that the qualifications required to operate the work equipment is input to the control unit, the control unit controls so that the hole-digging device or the crane device does not operate. Further, the work vehicle in the present embodiment is an aerial work vehicle equipped with a boom-type lifting device, but the lifting device is not limited to the boom type, and the same configuration can be made and the same effect can be obtained even in a so-called scissors type or vertical type lifting device. Further, in the above embodiment, the case where the owner of the aerial work vehicle is a rental company and the user of the aerial work vehicle is a person who has concluded a rental contract for the aerial work vehicle with the rental company has been described as an example. For example, the owner of the aerial work vehicle may be a company that performs electrical work or construction work, and the user of the aerial work vehicle may be an employee of the company. Then, a non-contact IC card having a memory in which the employee numbers of each employee are stored may be used as an employee card, and the function of the work equipment may be configured to be restricted based on the employee numbers.

[0055] Further, in the above-described embodiment, the case where the member number stored in the member card is read by the card reader 101 has been described as an example, but the present invention is not limited to such a configuration, and a method of inputting the member number using the immobilizer function may be adopted. For example, a key switch is provided in the lower operation device 10, and the lower operation device 10 is configured not to be operable unless this key switch is turned on. Then, an electronic chip is embedded in the key of this key switch, and when the rental company lends the aerial work vehicle to a member, the member number of the member is stored in the electronic chip embedded in the key. In such a configuration, when the key switch is turned on, the member number stored in the electronic chip embedded in the key is read and transmitted to the control unit 30.

[0056] In the above-described embodiment, the control unit 30 has been described by taking as an example the case where there is no particular restriction on the input of the member number read by the card reader 101. However, for example, the control unit 30 may be configured to accept the member number read by the card reader 101 or the like only when a predetermined personal identification number is input from the keyboard 102. Further, the keyboard 102 may be configured to input a member number (or administrator ID) and a password, and the control unit 30 may be configured to accept the member number (or administrator ID) input from the keyboard 102 when the member number and password input from the keyboard 102 match the member number (or administrator ID) and password previously stored in the control unit 30. By configuring in this way, the input of the member number can be limited to those with specific authority. Therefore, for example, even if a person possesses a membership card, the aerial work vehicle will not be used unless the rental company permits the person to use the aerial work vehicle.

[0057] Furthermore, the present invention is not limited to a truck-mounted type work vehicle. For example, the same configuration can be applied to an aerial work vehicle having iron wheels and being capable of traveling on a track, or an aerial work vehicle having a crawler device and being configured to be capable of traveling freely, and the same effects can be obtained.

Explanation of Signs

[0058] 1 Aerial work vehicle 2 Driver's cab 3 Vehicle body 4 Slewing platform 5 Boom 6 Vertical post 8 Work platform 9 Upper operating device 10 Lower operating device 11 Engine key switch 15 PTO operation lever 20 Detection device 30 Control unit 31 Regulation information memory 32 Operating status memory 40 Hydraulic Unit 91a Regulation Height Setting Switch 91b Regulation Working Radius Setting Switch 92 Regulation Release Switch 93 Alarm Device 101 Touch Panel

Claims

1. A work vehicle comprising a travelable vehicle body, a lifting device provided on the vehicle body, an operating device operated by an operator to operate the lifting device, and an operation control device that controls the operation of the lifting device according to the operation of the operating device, an attribute information reading device that reads the attribute information from a storage medium storing the attribute information of the operator, a lift limit information storage device that stores, in association with the attribute information, lift limit information indicating an upper limit of the lift of the lifting device that operates according to the operation of the operating device, and a lift regulation device that regulates an operation exceeding the upper limit of the lift of the lifting device by the operation control device according to the lift limit information corresponding to the attribute information read by the attribute information reading device. The work vehicle is characterized by comprising the above.

2. an operation status storage device that stores, at predetermined time intervals, operation information indicating the operation status of the lifting device after the start of operation, in association with the attribute information read by the attribute information reading device, an operation information output device that outputs the operation information stored in the operation status storage device, The work vehicle according to claim 1, characterized by comprising the above.

3. The work vehicle according to claim 1 or 2, characterized by having an information input restriction device that restricts the input of the lift limit information associated with the attribute information to the lift limit information storage device to a specific person, and prevents the lift limit information stored in the lift limit information storage device from being changed or deleted by a person other than the specific person.

Images