JP2009035386A - Inspection equipment for aerial work platforms - Google Patents

Abstract

An inspection device for an aerial work vehicle capable of making an accurate determination in detecting a failure of an undulation angle detector of an absolute angle system without being affected even when the stop position at the time of inspection is an inclined ground. provide.
An absolute angle type undulation angle detector 81 for detecting an undulation angle with respect to a horizontal plane of a boom which is provided on a vehicle body so as to be able to operate up and down, and the operation of a boom according to an operation of a boom operation lever 71. A boom operation control unit 61 for controlling the motor, a grounding detector 55 for detecting whether or not the lower end of the outrigger jack projects downward, and all the outrigger jacks are ungrounded by the grounding detector 55 When the boom operation lever 71 is operated for the first time after the outrigger jack is grounded in a state in which it is detected that the grounding state has been detected, the undulation angle detected by the undulation angle detector is within a predetermined range. And a sensor determination unit 63 that determines whether or not
[Selection] Figure 1

Description

  The present invention relates to an inspection apparatus for an aerial work vehicle including a boom that can freely move up and down on a vehicle body, and an outrigger jack that supports the vehicle body on the front, rear, left, and right sides of the vehicle body.

  An aerial work vehicle has a boom that can be raised, retracted, and swiveled on the vehicle body, a workbench that is provided at the tip of the boom, and a vehicle that is provided on the front, rear, left, and right of the vehicle body and projects downward. An outrigger jack that supports the vehicle, and after the outrigger jack projects downward from the vehicle body to stably support the vehicle body, the boom is raised, retracted, swung, etc. It can be moved to.

  In the above aerial work platforms, the hoisting angle detector that detects the hoisting angle of the boom and the amount of extension of the boom is detected in order to prevent accidents such as overturning and damage to the altitude working vehicle and to ensure safety during work. The extension amount detector that detects the turning angle of the boom, the turning angle detector that detects the turning angle of the boom, etc. are always calculated from these detection results, and the overturning moment acting in the direction of overturning the vehicle body from the boom is calculated. In such a case, a safety device is provided for restricting the boom operation in the direction in which the moment increases. In order for such a safety device to operate correctly, the above-described detectors must be operating normally, so each detection is performed when the boom retracted state is detected before the start of work or after the end of work. If the detected value of the detector is within the allowable range, and if the detected value is out of the allowable range as a result, it is considered that the corresponding detector is faulty, and a buzzer is sounded to that effect. An inspection device for notifying an operator is known (see, for example, Patent Document 1 and Patent Document 2).

JP 2000-289998 A Japanese Utility Model Publication No.4-115897

  By the way, as the above-mentioned undulation angle detector, an absolute angle type that detects the undulation angle with respect to the horizontal plane of the boom is often used. With this absolute angle type undulation angle detector, work at high places is carried out with the outrigger jack extended and the vehicle body supported horizontally, so even if the work site is on a slope, it is not affected at all, and the undulation angle can be accurately Can be detected.

  As a method for checking such a undulation angle detector, when the fall angle when the boom is stored is the maximum fall angle, the undulation angle detector is detected when the detected angle is detected to be more negative than the maximum fall angle. Judge that there is an abnormality. Here, when the work site is a slope, the work vehicle at an aerial position is stopped so that the boom extends toward the lower side of the slope, and the vehicle body is leveled by the outrigger jack. When the undulation angle detector is inspected by the inspection device, the detected value by the undulation angle detector is a negative angle, so it falls below the allowable angle range. There was a problem of being mistaken for it.

  The present invention has been made in view of such a problem, and even when the stop position at the time of inspection is an inclined ground, it is not affected, and accurate determination is made in failure detection of the undulation angle detector of the absolute angle method. It is an object of the present invention to provide an inspection device for an aerial work vehicle that can perform the above.

  In order to solve the above problems, an inspection apparatus for an aerial work vehicle according to the present invention includes a vehicle body, a boom that is operably provided on the vehicle body, and a detection of a undulation angle with respect to a horizontal plane of the boom. An angle-up and down angle detecting means (for example, an up-and-down angle detector 81 in this embodiment) and a boom operating means (for example, a boom operating lever 71 in this embodiment) for operating the boom. And an operation control means (for example, the controller 60 in the present embodiment) for controlling the operation of the boom according to the operation of the boom operation means, and attached to the front, rear, left and right of the vehicle body, and projecting downward to project the vehicle body An outrigger jack that supports the outer trigger and a grounding detecting means for detecting whether or not the outrigger jack projects downward and the lower end thereof is grounded (for example, First, after the grounding of the outrigger jacks, the grounding detector 55) in this embodiment and the grounding detection means detect that all the outrigger jacks have changed from the ungrounded state to the grounded state. When the boom operation means is operated, sensor determination means for determining whether or not the undulation angle detected by the undulation angle detection means is within a predetermined range (for example, sensor determination of the controller 60 of the present embodiment). Part 63).

  In the present invention, a hoisting cylinder that is disposed between the vehicle body and the boom and moves the boom up and down, and an axial force detecting means that detects an axial force acting on the hoisting cylinder (for example, the present embodiment). And a time storage means for storing a first time when all the outrigger jacks are detected to be ungrounded from the grounded state by the grounding detecting means (for example, the present embodiment) The time storage unit 64) of the controller 60 and the time storage means store the first time, and the ground detection means detects that all the outrigger jacks have changed from the ungrounded state to the grounded state. Time measuring means (for example, the time measuring unit 65 of the controller 60 in the present embodiment) for measuring the time until the second time, and the time measuring hand Elapsed time determination means for determining whether or not the measurement time from the first time to the second time measured by the above is a predetermined time or more (for example, the elapsed time determination unit 66 of the controller 60 in the present embodiment) The sensor determination means is the first to detect the boom after the grounding of the outrigger jack in a state where all the outrigger jacks have been detected as being grounded from the ungrounded state by the grounding detection means. When the operation unit is operated, the elapsed time determination unit performs the determination, and as a result, the axial force detected by the axial force detection unit when the measurement time is determined to be equal to or longer than a predetermined time. It may be configured to determine whether or not is within a predetermined range.

  Further, in the present invention, the boom is provided so as to be freely extendable and retractable, and is provided with an extension amount detecting means (for example, an extension amount detector 82 in the present embodiment) for detecting the extension amount of the boom, Turning angle detecting means (for example, turning angle detector 83 in the present embodiment) for detecting a turning angle, and the sensor determination means causes all of the outrigger jacks to change from an ungrounded state to a grounded state by the grounding detecting means. When the boom operating means is operated for the first time after the outrigger jack is grounded in a state where it has been detected, the extension amount detected by the extension amount detecting means and the turning angle detecting means It may be configured to determine whether or not the detected turning angle is within a predetermined range.

  The inspection apparatus for an aerial work vehicle according to the present invention operates the boom operating means first after all the outrigger jacks are grounded in a state in which it is detected that all the outrigger jacks have changed from the ungrounded state to the grounded state. Because the detector is inspected when the vehicle is horizontally supported, that is, with the vehicle body supported horizontally, the undulation angle of the absolute angle method is not affected even if the stopping position at the time of inspection is on a sloping ground. Accurate judgment can be made in detecting the failure of the detector, and safety during operation can be improved. In addition, since the detector is automatically inspected, the burden on the operator during the work can be reduced and can be reliably executed.

  In the present invention, a hoisting cylinder that is disposed between the vehicle body and the boom and moves the boom up and down, an axial force detecting means for detecting an axial force acting on the hoisting cylinder, and the ground contact detecting means The time storage means for storing the first time when it is detected that all the outrigger jacks have changed from the grounded state to the ungrounded state, and after the first time is stored by the time storage means, Time measuring means for measuring a time until a second time when all the outrigger jacks are detected to be in a grounded state from an ungrounded state by the grounding detecting means, and the first time measured by the time measuring means. And an elapsed time determining means for determining whether or not the measurement time from the time of the second time to the second time is a predetermined time or more, wherein the sensor determining means is connected to the ground detecting means. When the boom operating means is operated for the first time after the outrigger jack is grounded in a state where it has been detected that all the outrigger jacks have changed from the ungrounded state to the grounded state, the elapsed time determination is performed. When the measurement time is determined to be equal to or longer than the predetermined time, it is determined whether the axial force detected by the axial force detection means is within a predetermined range. It may be configured.

  With this configuration, it is detected that all the outrigger jacks have been changed from the ungrounded state to the grounded state, and after the all outrigger jacks are grounded, the boom operating means is operated first, and all the outriggers are operated. When the time from the first time when the jacks are changed from the grounded state to the ungrounded state until the second time when all the outrigger jacks are changed from the ungrounded state to the grounded state is a predetermined time or more, that is, the boom When the axial force of the undulating cylinder becomes almost zero after a sufficient amount of time has elapsed since the storage, the detector is inspected, so the axial force detector outputs the specified axial force (nearly zero) It is possible to accurately perform a so-called zero point inspection to determine whether or not a fault has occurred, not only in the detection of faults in the undulation angle detector of the absolute angle method, but also in fault detection of the axial force detector Ri can make an accurate judgment, it can contribute to the improvement of the work at the time of safety. Moreover, since this inspection work is performed automatically, a burden on an operator can be reduced and work efficiency can be improved.

  In addition, in a state where it has been detected that all the outrigger jacks have changed from the ungrounded state to the grounded state, after all the outrigger jacks are grounded, the boom operation means is operated first, and all the outrigger jacks are When the time from the first time when the grounding state is changed to the ungrounded state to the second time when all the outrigger jacks are changed from the ungrounded state to the grounded state is less than a predetermined time, the shaft of the hoisting cylinder is Since the force remains and the axial force detection may be inaccurate, the failure detection of the axial force detector is not performed.

  In the present invention, the boom is provided so as to freely extend and rotate, and includes an extension amount detection means for detecting the extension amount of the boom, and a turning angle detection means for detecting the turning angle of the boom, The sensor determination means is the first operation of the boom operation means after the grounding of the outrigger jack in a state in which it is detected by the grounding detection means that all the outrigger jacks have changed from an ungrounded state to a grounded state. It may be configured to determine whether or not the extension amount detected by the extension amount detection unit and the turning angle detected by the turning angle detection unit are within a predetermined range.

  With this configuration, when detecting the failure of the undulation angle detector of the absolute angle method, it is possible to simultaneously detect the failure of the extension amount detector and the turning angle detector, thereby improving the safety during work. Can do. In addition, since these inspection operations are performed automatically, the actual operation can be started without taking time for the inspection operation, and the work efficiency can be improved.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows an aerial work vehicle 1 equipped with an inspection device according to the present invention. Before describing the inspection device according to the present invention, the configuration of the aerial work vehicle 1 will be described first.

  The aerial work vehicle 1 is provided with a traveling wheel 11 and can be traveled from a driving cabin 12. A truck-type vehicle body 10, a swivel base 20 provided on the car body 10, and an upward extension from the swivel base 20. A boom (extensible boom) 30 having a base end supported by a foot pin 22 on the upper portion of the support column 21 provided on the support 21 and a work board 40 for boarding an operator attached to the distal end of the boom 30 are provided. Configured.

  The swivel base 20 is attached to the rear part of the vehicle body 10 so as to be rotatable 360 degrees around the vertical axis. A turning motor (hydraulic motor) 23 is provided inside the vehicle body 10. By rotating the turning motor 23, the turntable 20 can be horizontally turned through a gear (not shown). The boom 30 has a base boom 30a, an intermediate boom 30b, and a distal boom 30c that are nested, and the booms 30a, 30b, and 30c are relatively moved by a telescopic operation of a telescopic cylinder (hydraulic cylinder) 31 provided therein. The boom 30 can be extended and contracted in the axial direction. Further, a hoisting cylinder (hydraulic cylinder) 24 is straddled between the base end boom 30a and the column 21 of the swivel base 20, and the hoisting cylinder 24 is caused to move up and down by extending and retracting the hoisting cylinder 24. Can do.

  A vertical post holding bracket 32 is attached to the tip of the tip boom 30c, and the lower end of the vertical post 33 is pivotally supported by the vertical post holding bracket 32. The vertical post 33 is configured so that a vertical posture is always maintained by a leveling device (not shown) provided in the boom 30 regardless of the undulation angle of the boom 30.

  The work table 40 has a box shape, and is rotatably attached to the upper end portion of the vertical post 33 via a work table holding bracket 41 that protrudes to the outside. A swing motor (hydraulic motor) 42 is provided inside the work table holding bracket 41, and the work table 40 is swung around the vertical post 33 (horizontal) by rotating the swing motor 42. Swivel motion). Here, since the vertical post 33 is always maintained in the vertical posture as described above, as a result, the floor surface of the work table 40 is always held horizontally regardless of the undulation angle of the boom 30.

  The work table 40 is provided with a boom operation lever 71 for turning, raising and lowering the boom 30, and a work table operation lever 72 for swinging the work table 40. The operation signal output by the operation of the boom operation lever 71 is input to the boom operation control unit 61 of the controller 60 installed in the vehicle body 10 (see FIG. 1). The boom operation control unit 61 of the controller 60 corresponds to the first control valve V1 corresponding to the turning motor 23, the second control valve V2 corresponding to the telescopic cylinder 31, and the hoisting cylinder 24 based on the operation signal of the boom operation lever 71. Each spool (not shown) of the third control valve V3 is electromagnetically driven. The work table operation lever 72 directly (mechanically) drives a spool (not shown) of the fourth control valve V4 corresponding to the swing motor 42.

  A hydraulic pump P provided in the vehicle body 10 is rotationally driven by an engine, an electric motor, or the like (not shown), and the swing motor 23 telescopic cylinder 31 and undulation cylinder are passed through the first to fourth control valves V1, V2, V3, V4. 24 and the swing motor 42 are supplied with pressure oil. For this reason, the turning motor 23 telescopic cylinder 31 and the hoisting cylinder 24 can be operated as desired by operating the boom operating lever 71, and the swing motor 42 can be operated as desired by operating the worktable operating lever 72.

  Outrigger jacks 50 are provided at four positions on the front, rear, left and right of the vehicle body 10, and the vehicle body 10 can be stably supported by projecting sideways and downward (extending operation) and grounding. Each of the outrigger jacks 50 is attached to an outer post 51 that extends downward to the side of the vehicle body 10, an inner post 52 that is retractable downward in the outer post 51, and a lower end portion of the inner post 52. A grounding plate 53 and a jack cylinder 54 which is built in the outer post 51 and the inner post 52 and expands and contracts with respect to the outer post 51 by expanding and contracting.

  The overhanging operation (extension operation of the jack cylinder 54) and the retracting operation (contraction operation of the jack cylinder 54) of each outrigger jack 50 are performed by operating a jack operation lever 73 provided at the rear of the vehicle body 10. When the jack operation lever 73 is operated, the jack control valve VJ is electromagnetically driven via the jack operation control unit 62 of the controller 60, and the hydraulic oil from the hydraulic pump P is supplied to each jack cylinder 54 to expand and contract. The jack cylinder 54 can be extended (outrigger operation of the outrigger jack 50), or the jack cylinder 54 can be contracted (storage operation of the outrigger jack 50). Each outrigger jack 50 is provided with a ground detector 55 comprising a limit switch that detects whether or not the lower end portion (ground plate 53) of the outrigger jack 50 is grounded. Outputs an on signal, and outputs an off signal in other states. These on / off signals of the ground detector 55 are input to a sensor determination unit 63 of a controller described later. In FIG. 1, only one outrigger jack 50 and one jack control valve VJ are shown for simplification, but in actuality, it corresponds to a total of four outrigger jacks 50 provided on the vehicle body 10 in the front-rear and left-right directions. There are four jack cylinders 54 and four jack control valves VJ. There are also four ground detectors 55 each.

  When performing an aerial work using the aerial work vehicle 1 having such a configuration, the operator operates a jack operation lever 73 provided at the rear portion of the vehicle body 10 to input an overhang operation for each outrigger jack 50. Then, after each outrigger jack 50 is extended to the grounded state and the vehicle body 10 is brought into a stable posture, the vehicle 10 enters the work table 40 from above the vehicle body 10 through a step (not shown). Then, the boom operation lever 71 and the work table operation lever 72 provided on the work table 40 are operated to move the work table 40. Thereby, the worker on the work table 40 can move the work table 40 to an arbitrary position by his own lever operation and perform a desired work at a high place. In addition, after the work at the high place is completed, the worker on the work table 40 performs the lever operation himself to bring the boom 30 into the retracted posture, and gets off the work table 40. And after confirming that this worker got down on the ground, the jack operation lever 73 is operated and each outrigger jack 50 is stored.

  Next, the inspection device provided in the aerial work vehicle 1 will be described. As shown in FIG. 1, an inspection device provided in an aerial work vehicle 1 according to the present invention includes an outrigger jack 50, a boom operation lever 71, a controller 60, and an operation for turning on and off the controller 60. The power switch SW for performing the operation, the ground detector 55, the undulation angle detector 81, the extension amount detector 82, the turning angle detector 83, and the axial force detector 84 are configured.

  The undulation angle detector 81 is provided at the base end of the boom 30 and detects the undulation angle of the boom 30 with respect to the horizontal plane (so-called absolute angle method). The extension amount detector 82 is provided in the boom 30 and detects the extension amount of the boom 30. The turning angle detector 83 is provided in the vehicle body 10 and detects the turning angle of the boom 30 (the turntable 20) with respect to the vehicle body 10. The axial force detector 84 is provided at the lower end portion of the hoisting cylinder 24 and includes a load cell that detects the axial force by directly receiving the pressing force from the hoisting cylinder 24. All of the detection information of the detectors 81 to 84 is input to the sensor determination unit 63 of the controller 60.

  The time storage unit 64 of the controller 60 is for storing the first time when the ground detector 55 detects that all the outrigger jacks 50 are changed from the grounded state to the ungrounded state. The time 1 is input to the time measuring unit 65 of the controller 60. The time measuring unit 65 is a second time when all the outrigger jacks 50 are detected to be in the grounded state from the ungrounded state by the grounding detector 55 after the first time is stored in the time storage unit 64. The measured time is input to the elapsed time determination unit 66 of the controller 60. The elapsed time determination unit 66 determines whether or not the measurement time from the first time to the second time measured by the time measurement unit 65 is equal to or longer than a predetermined time, specifically after the boom 30 is stored. It is determined whether or not a necessary time has elapsed until the axial force of the undulation cylinder 24 becomes substantially zero after a lapse of time. The determination result by the elapsed time determination unit 66 is a sensor determination unit 63 of the controller 60. Is input. In this embodiment, the measurement time is assumed to be 8 hours. However, the measurement time is not limited to this, and the relationship between the temperature at the work site and the nature of the hydraulic oil used in the undulation cylinder, etc. It can be set as appropriate in consideration of various conditions.

  The sensor determination unit 63 of the controller 60 is configured so that the power switch SW is turned on and the ground detector 55 detects that all the outrigger jacks 50 are changed from the ungrounded state to the grounded state. When the boom operation lever 71 is first operated after the ground contact, that is, when the vehicle body is horizontally supported, the undulation angle detected by the undulation angle detector 81 and the extension amount detector 82 are detected. It is determined whether the extension amount and the turning angle detected by the turning angle detector 83 are within a predetermined range.

  In addition, the sensor determination unit 63 is configured to ground the outrigger jack 50 when the power switch SW is turned on and the ground detector 55 detects that all the outrigger jacks 50 have been changed from the ungrounded state to the grounded state. After that, when the boom operation lever 71 is operated for the first time, the elapsed time determination unit 66 makes a determination. As a result, when the measurement time is determined to be longer than the predetermined time, that is, the boom 30 is stored. When it is determined that the axial force of the hoisting cylinder 24 has become substantially zero after a sufficient time has elapsed, it is determined whether or not the axial force detected by the axial force detector 84 is within a predetermined range. (Specifically, it is determined whether or not the axial force detector 84 outputs a predetermined axial force (substantially zero)).

  When the sensor determination unit 63 detects an abnormality in the detectors 81 to 84, an alarm is performed by an alarm device 90 such as a buzzer. The alarm operation may be configured such that not only an audible notification by a buzzer or the like but also a visual notification by a lamp, a liquid crystal display, or the like.

  Next, the operation of the inspection device according to the present invention will be described. First, with the outrigger jack 50 and the boom 30 stored in the vehicle body 10, after moving the vehicle to the vicinity of the work site, the operator operates the jack operation lever 73 to move each outrigger jack 50 to its lower end. After the part (grounding plate 53) is extended until it is in a grounded state, the vehicle body 10 is stably supported, the vehicle 10 is placed on the work table 40. Then, after the power switch SW is turned on, the boom operation lever 71 and the work table operation lever 72 are operated in order to move the work table 40 to an arbitrary position.

  During this time, the sensor determination unit 63 of the controller 60 performs processing as shown in FIG. When the power switch SW is turned on (step S1), the sensor determination unit 63 determines whether or not the ground detector 55 detects that all the outrigger jacks 50 have changed from the ungrounded state to the grounded state. Specifically, it is determined whether or not the vehicle body 10 is horizontally supported (step S2).

  If it is determined in step S2 that the ground detector 55 has detected that all the outrigger jacks 50 are in the grounded state from the ungrounded state, the first boom control lever 71 is It is determined whether or not an operation has been performed (step S3). On the other hand, if it is determined in step S2 that the ground detector 55 has not detected that all the outrigger jacks 50 have been changed from the ungrounded state to the grounded state, the current routine processing is terminated, and the next routine processing is completed. Move on.

  In step S3, when it is determined that the operation of the boom operation lever 71 is performed first, the determination by the elapsed time determination unit 66 is performed, and as a result, the measurement time (that is, time) measured by the time measurement unit 65 is determined. The time from when the first time is stored in the storage unit 64 until the second time when all the outrigger jacks 50 are detected to be in the grounded state from the ungrounded state by the grounding detector 55) is a predetermined time. Specifically, it is determined whether or not the axial force of the hoisting cylinder 24 has become substantially zero after a sufficient time has elapsed since the boom 30 was stored (step S4). On the other hand, when it is determined in step S3 that the operation of the boom operation lever 71 has not been performed for the first time, the current routine process is terminated, and the next routine process is started.

  In step S4, if the elapsed time determination unit 66 determines that the measurement time is equal to or longer than the predetermined time, whether or not the axial force detected by the axial force detector 84 is within a predetermined range (here, substantially zero). That is, it is determined whether the axial force detector 84 is normal (step S5). On the other hand, in step S4, if the elapsed time determination unit 66 determines that the measurement time is not equal to or longer than the predetermined time, the axial force detector 84 is not checked, and the process proceeds to step S7.

  When it is determined in step S5 that the axial force detected by the axial force detector 84 is within the predetermined range, that is, when it is determined that the axial force detector 84 is normal, the process proceeds to step S7. On the other hand, when it is determined that the axial force detected by the axial force detector 84 is not within the predetermined range, that is, when it is determined that the axial force detector 84 is out of order, the alarm device 90 is activated. The operator is notified of this (step S6), and the process proceeds to step S7.

  In step S7, it is determined whether the undulation angle detected by the undulation angle detector 81, the extension amount detected by the extension amount detector 82, and the turning angle detected by the turning angle detector 83 are within a predetermined range. To do. In step S7, when it is determined that the values detected by the undulation angle detector 81, the extension amount detector 82, and the turning angle detector 83 are within the predetermined ranges, that is, the detectors 81 to 83 are normal. If it is determined that this is the case, the present process is terminated as it is. On the other hand, when it is determined in step S7 that the values detected by the undulation angle detector 81, the extension amount detector 82, and the turning angle detector 83 are not within the predetermined ranges, that is, the detectors 81 to 83 are faulty. If it is determined, the alarm device 90 is activated to notify the operator to that effect (step S8), and the process is terminated.

  If the above-described processing is performed by the sensor determination unit 63 and all the detectors to be inspected are normal, the worker continues to work at a high place. Then, after the work at the high place is completed, the worker on the work table 40 operates the levers 71 and 72 by himself to bring the boom 30 into the retracted position and gets off the work table 40. And after confirming that this worker got down on the ground, the jack operation lever 73 is operated and each outrigger jack 50 is stored.

  In addition, as a result of the above processing performed by the sensor determination unit 63, if the detector to be inspected has a failure and the alarm device 90 is activated, the correction of the corresponding detector is promptly performed. Appropriate measures such as getting started can be taken before working at high places, and safety at the time of work can be achieved.

  Although the preferred embodiments of the present invention have been described so far, the scope of the present invention is not limited to those shown in the above-described embodiments.

  For example, in the above embodiment, the axial force detector 84 that detects the axial force acting on the undulation cylinder 24 is a load cell type that directly receives the pressing force from the undulation cylinder 24, but other types (undulations) It may be composed of a strain gauge affixed to the rod portion of the cylinder 24, and its resistance value may be changed according to the axial force of the undulating cylinder 24).

  Moreover, in the said embodiment, although the object to which the inspection apparatus of this invention is applied was the aerial work vehicle 1 which has the work platform 40 for operator boarding in the front-end | tip part of a boom, it is not limited to this. The present invention can be applied to any boom working vehicle having a crane vehicle or a digging pillar car having another working machine at the tip of the boom.

The block diagram of the inspection apparatus which concerns on this invention is shown. 1 shows a front view of an aerial work vehicle equipped with an inspection device according to the present invention. FIG. The flowchart explaining the flow of a process of the sensor determination part which concerns on this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aerial work vehicle 10 Vehicle body 24 Hoisting cylinder 30 Boom 50 Outrigger jack 55 Grounding detector (grounding detection means)
60 controller (work control means)
63 Sensor determination unit (sensor determination means)
64 Time storage unit (time storage means)
65 Time measuring unit (time measuring means)
66 Elapsed time determination unit (elapsed time determination means)
71 Boom operation lever 81 Relief angle detector (relief angle detecting means)
82 Extension amount detector (Extension amount detection means)
83 Turning angle detector (turning angle detection means)
84 Axial force detector (Axial force detection means)
SW Power switch

Claims (3)

The car body,
A boom that is provided on the vehicle body so as to be movable up and down, etc .;
An absolute angle type undulation angle detecting means for detecting the undulation angle with respect to the horizontal plane of the boom;
Boom operating means for performing an operation for operating the boom;
An operation control means for controlling the operation of the boom according to the operation of the boom operation means;
Outrigger jacks attached to the front, rear, left and right of the vehicle body and projecting downward to support the vehicle body,
A grounding detection means for detecting whether or not the outrigger jack projects downward and the lower end thereof is grounded;
When the boom operating means is first operated after the grounding of the outrigger jack in a state where it is detected that all the outrigger jacks are in the grounded state from the ungrounded state by the grounding detecting means, An inspection apparatus for an aerial work vehicle, comprising: sensor determination means for determining whether the undulation angle detected by the undulation angle detection means is within a predetermined range. A hoisting cylinder that is disposed between the vehicle body and the boom and moves the boom up and down; and an axial force detecting means that detects an axial force acting on the hoisting cylinder;
Time storage means for storing a first time when all of the outrigger jacks are detected to be ungrounded from a grounded state by the grounding detecting means;
Measures the time from when the first time is stored by the time storage means to the second time when all the outrigger jacks are detected to be in the grounded state from the ungrounded state by the grounding detecting unit. Time measuring means to perform,
Elapsed time determination means for determining whether or not the measurement time from the first time to the second time measured by the time measurement means is a predetermined time or more,
The sensor determination means is the first operation of the boom operation means after the grounding of the outrigger jack in a state in which it is detected by the grounding detection means that all the outrigger jacks have changed from an ungrounded state to a grounded state. Is performed by the elapsed time determination means, and as a result, when it is determined that the measurement time is equal to or longer than a predetermined time, the axial force detected by the axial force detection means falls within a predetermined range. 2. The inspection apparatus for an aerial work vehicle according to claim 1, wherein it is determined whether or not the vehicle is within the range. The boom is provided so as to be freely extendable and turnable,
An extension amount detecting means for detecting the extension amount of the boom;
Turning angle detecting means for detecting the turning angle of the boom,
The sensor determination means is the first operation of the boom operation means after the grounding of the outrigger jack in a state in which it is detected by the grounding detection means that all the outrigger jacks have changed from an ungrounded state to a grounded state. 2 or 3, wherein it is determined whether or not the extension amount detected by the extension amount detection means and the turning angle detected by the turning angle detection means are within a predetermined range. The inspection apparatus for an aerial work vehicle described in 2.

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