JP3913154B2 - Boom operation control device for track work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a boom operation control device for a track work vehicle, and more particularly, to a track work vehicle configured by providing a work table via a boom on a vehicle body that can travel on a track and having a pantograph above a driving cabin. The present invention relates to a boom operation control device.
[0002]
[Prior art]
Such a track work vehicle travels on a track and moves to a work site, moves a work table on which an operator is boarded to a desired height by a boom provided so that the vehicle body can turn and undulate. Maintenance, inspection, etc. of the trolley wire stretched above can be performed. Electricity normally supplied to the train flows through the trolley line, and there is a problem that an operator may be electrocuted if maintenance, inspection work, etc. of the trolley line is performed in such an energized state. For this reason, the work is generally performed after the power supply to the trolley wire in the work section is stopped before the work.
[0003]
However, even if the power supply is stopped, there is a residual voltage on the trolley wire, power is accidentally supplied to the trolley wire during work, or the trolley wire goes beyond the work section where the power supply is stopped. When a work vehicle enters a section where power is being supplied, there is a risk that an operator on the work table may receive an electric shock. For this reason, a pantograph having conductivity that can come into contact with the trolley wire is provided above the driving cabin, and a grounding circuit is provided by connecting the pantograph and the track running wheel with a grounding wire. Thereby, the residual voltage of the trolley wire can be released to the track side (ground side) via the ground circuit. In addition, if power is supplied to the trolley wire during work or if it enters a section where power is supplied, the trolley wire is short-circuited to the track side via the ground circuit, so the breaker at the substation Can be operated to stop the power supply to the trolley wire.
[0004]
Here, when the work table is moved by driving the boom, the boom or the work table may interfere with the pantograph depending on the operating position of the boom. Therefore, in the track work vehicle, an interference area in which the boom or workbench may interfere with the pantograph when the boom is operated is set. A boom operation control device for restricting the movement of the boom to is mounted.
[0005]
[Problems to be solved by the invention]
Here, when the set interference area is always set as a constant area regardless of the expansion / contraction position of the pantograph, the pantograph is in the storage position and the boom operating position is above the pantograph in the interference area. In some cases, there is no possibility that the work table or the boom interferes with the pantograph even if the boom is pivoted in the left-right direction. As a result, in such an interference area, there is a problem that there is a useless area where the boom does not actually interfere but the boom cannot be moved.
[0006]
In addition, the movement of the boom to the area where there is no possibility of interference is restricted, but in order to move the boom to this area, the boom action control device is provided with an action restriction release switch for releasing the boom action restriction. There is something. However, when this operation restriction release switch is operated and the boom is moved to the above-described area where there is no possibility of interference, the pantograph actuator that expands and contracts the pantograph is configured to be operable regardless of the operating position of the boom. In some cases, the pantograph may come into contact with the boom or the workbench to cause damage to the pantograph.
[0007]
The present invention has been made in view of such problems, and eliminates a useless area where the boom does not actually interfere but cannot move the boom from the interference area. It is an object of the present invention to provide a boom operation control device for a track work vehicle that can prevent a situation in which a pantograph is damaged due to contact.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, a boom operation control device for a track work vehicle according to the present invention includes a vehicle body that is provided with a chassis behind the driver's seat and can travel on the track, and can swing and undulate freely on the chassis. A boom that is provided with a workbench at the tip and is configured to freely extend and retract, a boom actuator that drives the boom (for example, the hoisting cylinder 23, the turning motor 24, and the telescopic cylinder 25 in the embodiment); A pantograph that can be moved up and down between the extended position that contacts the trolley wire that extends over the track and is stored above the driver's seat, and the extended position of the pantograph are detected. Pantograph position detecting means (for example, the pantograph attitude detecting sensor 63 in the embodiment) and boom position detecting means for detecting the operating position of the boom with respect to the chassis ( For example, the boom position detection sensor 53) in the embodiment, the first interference area where the boom and the work table may interfere with the pantograph when the pantograph is in the extended position, and the boom and the boom when the pantograph is in the retracted position. Interference area setting means (for example, the memory 75 in the embodiment) for setting a second interference area where the workbench may interfere with the pantograph, and the first interference area and the second interference area based on a signal from the pantograph position detection means. The interference area selection means for selecting one (for example, the interference area selection circuit 73 in the embodiment) and the movement of the boom into the first interference area or the second interference area selected by the interference area selection means are regulated. Boom operation control means for controlling the operation of the boom actuator (for example, the operation control circuit 71 in the embodiment). It is.
[0009]
According to the boom operation control device having the above-described configuration, since the interference area when the pantograph is in the extended position and when the pantograph is in the retracted position is set separately, the boom has the first interference when the pantograph is in the retracted position. Even within the area, the operation of the boom is not restricted. For this reason, when there is no possibility that the boom or the workbench actually interferes with the pantograph, it is possible to eliminate the existence of a useless interference region that restricts the operation of the boom.
[0010]
The boom operation control apparatus having the above-described configuration includes a pantograph actuator (for example, the extension spring 155 and the lowering cylinder 156 in the embodiment) that expands and contracts the pantograph, and the boom operation control means is configured such that the pantograph is retracted by the pantograph position detection means. When the boom operation position detected by the boom position detection means is within the first interference region, the operation of the pantograph actuator for extending the pantograph may be restricted.
[0011]
According to the boom operation control device having the above-described configuration, when the boom is present in the first interference region above the pantograph in the retracted state, the extension movement of the pantograph is restricted, so that damage to the pantograph can be prevented in advance. it can.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an orbital altitude work vehicle 1 as an example of a track work vehicle according to the present invention. As shown in FIG. 1, the track-and-terrain work vehicle 1 has a driver's seat 11 and a chassis 12 provided behind the driver's seat 11, and a vehicle body 10 capable of traveling on roads by tire wheels 13. A boom 30 that can be raised and lowered by a lifting cylinder 23 whose base is pivotally connected to a support column 21 that extends upward from the swivel base 20, and a tip of the boom 30. And a work table 40.
[0013]
The swivel base 20 can be swiveled horizontally by a swivel motor 24 shown in FIG. 4 provided in the chassis 12, whereby the boom 30 can be swung 360 degrees. The boom 30 has a plurality of telescopic boom members, and can be expanded and contracted by a telescopic cylinder 25 shown in FIG. The work table 40 is attached via a vertical post 31 which is provided at the tip of the boom 30 and is always kept in a vertical state, so that the floor surface of the work table 40 is always kept horizontal. Yes. Further, the work table 40 is turnable with respect to the vertical post 31 and can be turned horizontally by a horizontal turn motor 43 shown in FIG. A step 40a extending in the horizontal direction is attached to the vehicle rear side end portion of the work table 40 extending in the front-rear direction and on the right side of the vehicle.
[0014]
The boom 30 is retracted from the vehicle rear side to the front side in the fully contracted state and stored in the vehicle with the boom tip inclined obliquely downward, and the work table 40 is stored in the vehicle extended in the vehicle front-rear direction. The In this state, the step 40a extends to the vehicle right side and the vehicle rear side of the boom 30 extending forward and backward. A staircase 45 having a plurality of steps 45a is attached to the right end of the column 21 of the vehicle, and this staircase 45 is disposed near the aforementioned step 40a of the work table 40 in the retracted state. For this reason, the operator can get on and off the work table 40 by using the stairs 45.
[0015]
Further, a boom operation device 41 is provided on the work table 40. By manually operating the levers provided therein, the boom 30 is moved up and down, telescopic, swiveled, and the work table 40 is swung. It is configured to be able to perform movement. Details of the boom operation device 41 will be described later.
[0016]
A front iron wheel support member 14 and a rear iron wheel support member 15 are attached to the rear of each tire wheel 13 at four positions on the front and rear, left and right of the vehicle body 10 so as to be swingable up and down. A front iron wheel 16 and a rear iron wheel 17 are rotatably attached to each other. These iron wheels 16 and 17 are projected downward and moved upward by the operation of a steel wheel overhanging storage cylinder (not shown) provided between the lower part of the chassis 12 and the front iron wheel support member 14 or the rear iron wheel support member 15. Can be stored.
[0017]
A turntable 18 for moving the vehicle body 10 between the road and the track R and projecting downward is provided below the vehicle body 10. The turntable 18 can be extended downward and stored upward by a built-in turntable extension storage cylinder (not shown). In addition, outriggers 19 that stably support the vehicle body 10 at the time of working at a high place are provided at the front, rear, left, and right of the vehicle body 10. These outriggers 19 operate a jack extension / retraction switch (not shown) provided in a lower operation device (not shown) to extend and contract a jack cylinder provided in each outrigger 19 downward. Or can be stored upwards.
[0018]
In addition, when the work is performed on the track R, the electric power of the trolley wire T stretched over the track R is released to the track side (grounded) to the electric vehicle at the track and land aerial work 1 so as to prevent the operator's electric shock. An electric shock prevention device 100 is provided to prevent this. The electric shock prevention device 100 extends upward from the chassis 12 immediately behind the driver's seat 11 and bends and extends above the driver's seat 11, and is provided at the tip of the support member 110. And the pantograph 150 installed on the top of the pedestal 120, and a grounding wire 160 for grounding electrically connected to the pantograph 150.
[0019]
The gantry 120 includes a lower base 121 attached to the front end of the support member 110 in a state of extending substantially horizontally, a scissor link mechanism 130 having a lower end attached to the lower base 121, and the scissor link mechanism 130. And an upper base 140 attached to the upper end.
[0020]
As shown in FIG. 2, the scissor link mechanism 130 includes two left and right first arms 131 (the left-right direction is a direction perpendicular to the planes of FIGS. 1 and 2) provided with the upper side inclined backward. The left and right second arms 132 having the same length are provided with the upper side inclined forward. The central portion of the first arm 131 and the central portion of the second arm 132 are connected by a pin P1. It is pivoted. The lower end of the first arm 131 is pivotally connected to the front of the lower base 121 by a pin P2, and the lower end of the second arm 132 is formed to extend in the front-rear direction on the side surface of the lower base 121 by the pin P3. It is attached so as to be slidable along the groove 122. The upper end of the first arm 131 is pivotally connected to the rear of the upper base 140 by a pin P4, and the upper end of the second arm 132 is formed by extending in the front-rear direction on the side surface of the upper base 140 by the pin P5. It is attached so as to be slidable along the groove 141 formed. A lifting cylinder 145 shown in FIG. 4 that pivots the first arm 131 and the second arm 132 is pivotally connected between the second arm 132 and the lower base 121.
[0021]
Since the scissor link mechanism 130 has such a configuration, when the first arm 131 and the second arm 132 are laid down, the upper end portion is lowered, and when both the arms 131 and 132 are raised, the upper end portion is raised. Will rise. Accordingly, the upper base 140 is translated in the vertical direction, and the upper base 140 is moved between the storage position where the upper base 140 is stored on the lower base 121 and the protruding position above the lower base 121. The pantograph 150 installed on the upper base 140 can be projected upward and stored downward. When the pantograph 150 is changed from the retracted state to the extended state, the upper base 140 moves in the direction of the arrow A in FIG. 2, and therefore moves forward as well as moving upward. For this reason, when the pantograph 150 projects upward, it can be offset forward by the distance L shown in FIG. 2 rather than when the pantograph 150 is moved upward just above the lower base 121.
[0022]
As shown in FIG. 1, the pantograph 150 includes a base 151 attached on the upper base 140, a first arm 152 provided on the base 151, and a second arm attached to the distal end of the first arm 152. 153 and a slot plate 154 attached to the tip of the second arm 153. Each of the first arm 152 and the second arm 153 is configured to be movable up and down, and the first arm 151 and the second arm 153 are raised and lowered by the overhanging spring 155 shown in FIG. Is extended upward (in this extended attitude, the sliding plate 123 comes into contact with the trolley wire T from below). The extension spring 155 shown in FIG. 3B is in an extended state when the pantograph 150 is in a retracted state, and when the pantograph 150 is in a non-retracted state, the extension spring 155 is contracted to bring the pantograph 150 into an extended state. Further, a lowering cylinder 156 is installed on the upper base 140 shown in FIG. 3 (b), and the first arm 152 and the second arm 153 projecting from the lowering cylinder lie down to contract the pantograph 150 downward. (At this time, the first arm 152 and the second arm 153 are both in a horizontal state). The pantograph 150 includes a locking device 157 shown in FIG. 3A that holds the pantograph 150 in the retracted position by fixing the second arm 153 with the first arm 152 and the second arm 153 in the retracted position. Is provided. When the pantograph 150 is in the retracted state, the locking device 157 has a locking portion (not shown) that is slidably locked to lock the second arm 153, and swings the locking portion so that the second arm 153 moves. And a main body (not shown) for releasing the lock.
[0023]
The ground plate 160 for grounding electrically connected thereto extends downward along the arms 153 and 152, the scissor link mechanism 130, and the support member 110 in the slot plate 154 shown in FIG. It passes through the inside and is connected from the rear part of the chassis 12 to the left or right rear wheel 17. The rear iron wheel 17 (which is also the front iron wheel 16) is electrically insulated from the vehicle body 10, and the left and right rear iron wheels 17 are also insulated from each other.
[0024]
Next, the boom operation control apparatus according to the present invention mounted on the roadside altitude work vehicle 1 configured as described above will be described. The boom operation control device has functions of preventing the pantograph 150 from interfering with the boom 30 and the work table 40 and controlling the operation of the pantograph 150 and the boom 30. As shown in FIG. 4, the boom operation control device 50 operates the boom 30 and the work table 40 shown in FIG. 1 (the turning motion, the undulation motion, the expansion and contraction motion, and the swing motion of the work table 40). The operation device 41, the pantograph operation device 51 for operating the telescopic operation of the gantry 120 and the pantograph 150 shown in FIG. 1, the locking device 157 for locking the pantograph 150, and the operation of the boom 30 and the work table 40 shown in FIG. A boom position detection sensor 53 for detecting the position, a boom extension sensor 59 for detecting the extension amount of the boom 30, and a pantograph attitude detection sensor 63 for detecting the attitude of the pantograph 150 shown in FIG. , A boom 30, a pedestal 120, a pantograph 150, a control unit 71 including an operation control circuit 71 that controls the operation of the lock device 157. It is configured to have a roller 70.
[0025]
The boom operation device 41 is provided on the work table 40 shown in FIG. 1, and the hydraulic control valves V <b> 1 to V <b> 4 are operated via the operation control circuit 71 of the controller 70 by tilting an operation lever provided therein. Can be proportionally driven. Details of the controller 70 will be described later. These hydraulic control valves V1 to V4 are the actuators (the hoisting cylinder 23, the telescopic cylinder 25, the swing motor) described above relating to the movement of the work table 40 shown in FIG. 1 from a hydraulic pump driven by a traveling engine (not shown) mounted on the vehicle. 24 and the horizontal swing motor 43) are controlled to supply and discharge hydraulic oil, whereby the actuator performs an operation according to the tilting operation of the operation lever. For this reason, the operator who has boarded the work table 40 shown in FIG. 1 can perform the raising / lowering movement, the expansion / contraction movement, the turning movement, and the swinging movement of the work table 40 by operating the operation lever. It is possible to move the table 40 to a desired position and perform work at a high place.
[0026]
As shown in FIG. 1, the pantograph operation device 51 includes a pantograph operation switch 52 that is provided on the work table 40 and performs an extended storage operation of the pantograph 150 and the gantry 120. The pantograph operation switch 52 is a toggle switch that can select whether the pantograph 150 and the pedestal 120 are in the retracted position or the extended position, and the switching operation of the pantograph operation switch 52, that is, the switch 52 is switched to the pantograph 150. Switching from the position for selecting the retracted posture (hereinafter, this position is referred to as “stored selected position”) to the position for selecting the projecting posture of the pantograph 150 (hereinafter, referred to as “extended selected position”). In response to an operation signal output by an operation or an operation of switching the switch 52 from the overhang selection position to the storage selection position, the positions of the hydraulic control valves V5 and V6 shown in FIG. 4 are switched.
[0027]
As shown in FIG. 4, these hydraulic control valves V5 and V6 control the supply and discharge of the hydraulic oil supplied from the hydraulic pump described above to the lowering cylinder 156 and the lifting cylinder 145. 156 and the elevating cylinder 145 perform an expansion operation or a contraction operation in accordance with the position selected by the pantograph operation switch 52 shown in FIG. More specifically, when the pantograph operation switch 52 shown in FIG. 1 is selected to the overhang selection position, the operation control circuit 71 first extends the lifting cylinder 145 to extend the gantry 120 shown in FIG. The upper base 140 shown in FIG. 1 is moved to the upper position. When the upper base 140 moves to the upper position, the locking device 157 shown in FIG. 3A is operated to release the locked state of the pantograph 150, and the pantograph 150 is extended. On the other hand, when the pantograph operation switch 52 shown in FIG. 1 is selected to the storage selection position, the operation control circuit 71 first moves the lowering cylinder 156 in a contracted manner to bring the pantograph 150 shown in FIG. At the same time that the pantograph 150 is in the retracted position, the locking device 157 shown in FIG. 3 locks the pantograph 150 in the retracted position. Then, the operation control circuit 71 moves the elevating cylinder 145 in a contracted manner to bring the gantry 120 shown in FIG. 1 into the retracted state. For this reason, the operator who has boarded the work table 40 can change the pantograph 150 from the retracted position to the extended position or from the extended position to the retracted position by operating the pantograph operation switch 52.
[0028]
The boom position detection sensor 53 includes a turning angle sensor 54 for detecting the turning angle of the boom 30 shown in FIG. 1, a undulation angle sensor 55 for detecting the undulation angle of the boom 30 with respect to the chassis 12, and the work table 40 shown in FIG. And a swing angle sensor 56 that detects a turning angle (swing angle) with respect to the vertical post 31. Detection signals from these sensors are sent to the operation control circuit 71, and the operation control circuit 71 calculates the positions of the boom 30 and the work table 40 with respect to the vehicle body 10 shown in FIG. The handling of the calculated position information of the boom 30 and the work table 40 will be described later. The boom extension sensor 59 has a function of detecting the extension amount of the boom 30 shown in FIG. The boom extension sensor 59 may be a limit switch, which outputs a full contraction signal (ON signal) when the boom 30 is in a fully contracted state, and outputs an extend signal (OFF signal) when the boom 30 is extended from the fully contracted state. You may make it output.
[0029]
The pantograph posture detection sensor 63 has a pantograph limit switch (not shown) attached to the pantograph 150 shown in FIG. 1, and a gantry extension sensor (not shown) attached to the lifting cylinder 145 shown in FIG. Configured. The pantograph limit switch is performed by detecting whether or not the pantograph 150 shown in FIG. 1 is in the overhanging posture and whether or not the pantograph 150 is in the retracted posture. This is a configuration in which the pantograph 150 shown in FIG. 1 can take only one of the retracted posture and the extended posture in which the sliding plate 154 contacts the trolley wire T. This is because it can be said that it is in the extended position when it is in the posture and in the retracted posture. The gantry extension sensor outputs an extension signal corresponding to the extension amount of the lift cylinder 145. For this reason, the interference area selection circuit 73 of the controller 70, which will be described later, receives an extension signal from the gantry extension sensor when the gantry 120 shown in FIG. 1 is in the extension state and a pantograph limit switch when the pantograph 150 is in the extended posture. 1 can be determined that the pantograph 150 and the gantry 120 shown in FIG. 1 are in the extended state, and the extension of the gantry extension sensor when the gantry 120 shown in FIG. 1 is in the retracted state. When the signal and the storage signal from the pantograph limit switch indicating that the pantograph 150 is in the storage posture are received, it can be determined that the pantograph 150 and the gantry 120 are in the storage state.
[0030]
Next, the controller 70 will be described. The controller 70 includes the above-described operation control circuit 71, interference area selection circuit 73, and memory 75. First, the memory 75 will be described. In the memory 75, when the pantograph 150 and the gantry 120 shown in FIG. 1 are in the extended position, the boom 30 or the work table 40 shown in FIG. And a movement region of the boom 30 (hereinafter referred to as “a first interference region”) in which the boom 30 or the work platform 40 may interfere with the pantograph 150 when each of the pantograph 150 and the gantry 120 is in the retracted state. "Second interference area") is set. More specifically, as shown in FIG. 5, the first interference region W1 is attached to the end of the work table 40 when the boom 30 is turned with the work table 40 facing in the vehicle left-right direction. The region within the turning angle range θ1 of the boom 30 that is likely to interfere with the mount 120 (see FIG. 5A) and the boom 30 interferes with the pantograph 150 when the boom 30 is tilted down. This is a three-dimensional region composed of a region (see FIG. 5B) within the hoisting angle range λ1 of the boom 30 that has a possibility. On the other hand, as shown in FIG. 6, the second interference region W2 is a region within the turning angle range θ1 of the boom 30 described above when the pantograph 150 and the gantry 120 are in the retracted state (see FIG. 6A). ) And a region within the hoisting angle range λ2 of the boom 30 where the boom 30 interferes with the pantograph 150 when the boom 30 is tilted down (see FIG. 6B).
[0031]
When the pantograph posture detection sensor 63 determines that the pantograph 150 and the gantry 120 shown in FIG. 5 are in the extended position, the interference area selection circuit 73 shown in FIG. The first interference area W1 is read, and when the pantograph posture detection sensor 63 determines that the pantograph 150 and the gantry 120 shown in FIG. 6 are in the storage position, the second interference area W2 is read from the memory 75. Yes.
[0032]
As described above, the operation control circuit 71 controls the operation of the hydraulic control valves V1 to V6 according to the operation of the boom operation device 41 or the pantograph operation device 51, and the boom 30, the work table 40, the gantry 120, and the like shown in FIG. While controlling the operation of the pantograph 150, it has the following functions. That is, the operation control circuit 71 moves the boom 30 shown in FIG. 1 within the area except the first interference area W1 shown in FIG. 5 or the second interference area W2 shown in FIG. 6 selected by the interference area selection circuit 73. In addition, the operation of the hydraulic control valves V1 to V6 is controlled so as to restrict the movement of the boom 30 into the selected first interference region W1 or second interference region W2.
[0033]
For this reason, when the vehicle shown in FIG. 1 is placed on the rail R and the pantograph 150 and the gantry 120 are brought into the overhanging state, the interference region selection circuit 73 responds to the overhanging signal from the pantograph attitude detection sensor 63. The first interference area W1 shown in FIG. The operation control circuit 71 controls the operation of the boom actuator (that is, the swing motor 24, the hoisting cylinder 23, the telescopic cylinder 25, and the horizontal swing motor 43) in accordance with the operation of the boom operation device 41, but the boom position detection sensor 53. When the operating position of the boom 30 and the work table 40 shown in FIG. 5 detected by the above is the position where the boom 30 is about to enter the first interference area W1, the boom 30 of the boom actuator is allowed to enter the first interference area W1. Regulates the operation of the boom actuator. For this reason, when the pantograph 150 and the gantry 120 shown in FIG. 5 are in the extended state, it is possible to prevent the boom 30 and the work table 40 from coming into contact with the pantograph 150 and the gantry 120.
[0034]
In addition, when the pantograph 150 and the gantry 120 shown in FIG. 6 are set in the retracted state, the interference area selection circuit 73 changes the second interference area W2 shown in FIG. read out. The operation control circuit 71 controls the operation of the boom actuator in accordance with the operation of the boom operation device 41. The operation positions of the boom 30 and the work table 40 shown in FIG. If the position is about to enter the interference area W2, the operation of the boom actuator that causes the boom 30 to enter the second interference area W2 of the boom actuator is restricted. For this reason, when the pantograph 150 and the gantry 120 are in the retracted state, it is possible to prevent the boom 30 and the work table 40 from coming into contact with the pantograph 150 and the gantry 120 in advance.
[0035]
Here, as shown in FIG. 6B, when the operating position of the boom 30 when the pantograph 150 and the gantry 120 are in the retracted state is located outside the second interference area W2 and within the first interference area W1. Since the interference area selection circuit 73 shown in FIG. 4 selects the second interference area W2, the operation control circuit 71 shown in FIG. 4 does not restrict the operation of the boom 30 located outside the second interference area W2. For this reason, even if the operation position of the boom 30 is outside the second interference region W2, the operation according to the present invention is compared with the case where the operation of the boom 30 is regulated when the operation position is within the first interference region W1. The boom operation control device 50 shown in FIG. 4 does not have a wasteful interference area where the boom 30 does not actually interfere but cannot be operated, and can improve work efficiency.
[0036]
Further, as shown in FIG. 6B, the operation control circuit 71 is located in the first interference region W1 above the pantograph 150 in the retracted state when the tip of the boom 30 or the work table 40 is in the retracted state. If at least one of the gantry 120 is extended, the pantograph 150 may come into contact with the boom 30 or the work table 40 to damage the pantograph 150. Therefore, the operation control circuit 71 shown in FIG. 4 is detected by the pantograph posture detection sensor 63 that the pantograph 150 and the gantry 120 are in the retracted position, and is detected by the boom position detection sensor 53 and the boom extension sensor 59 shown in FIG. When the operating positions of the boom 30 and the work platform 40 are detected to be within the first interference region W1 and above the pantograph 150, the lift cylinder 145 shown in FIG. The operation is restricted and the unlocking operation of the pantograph 150 by the lock device 157 shown in FIG. 3 is restricted. For this reason, the situation where the pantograph 150 and the gantry 120 extend and the pantograph 150 comes into contact with the boom 30 or the work table 40 can be prevented in advance, and the pantograph 150 can be prevented from being damaged.
[0037]
Note that the ground wire 160 of the electric shock prevention device 100 shown in FIG. 1 described above does not necessarily have to be connected to the rear iron wheel 17 as in the above-described embodiment, and may be the front iron wheel 16 or the like. Furthermore, the application target of the present invention is not limited to the above-mentioned track and land aerial work vehicle 1 that can travel on both the road and the track R, and is a track work vehicle that can travel only on the track R. Also good. Further, the pantograph 150 is not limited to the prevention of electric shock, and may be one for measuring the height of the trolley wire T.
[0038]
【The invention's effect】
As described above, according to the boom operation control device for a track work vehicle according to the present invention, since the interference area when the pantograph is in the extended position and the retracted position is set separately, the pantograph is stored. Even if the boom is in the first interference area when in the position, the operation of the boom is not restricted. For this reason, when there is no possibility that the boom or the workbench actually interferes with the pantograph, it is possible to eliminate the existence of a useless interference region that restricts the operation of the boom.
[Brief description of the drawings]
FIG. 1 is a side view of an orbital high altitude work vehicle that is an example of a track work vehicle equipped with a boom operation control device according to the present invention.
FIG. 2 is a side view showing a configuration of a gantry provided on the above-mentioned track and land work vehicle.
FIGS. 3A and 3B show a pantograph provided on the above-mentioned track and field aerial work vehicle, wherein FIG. 3A is a front view of the pantograph in a retracted state, and FIG. 3B is a plan view of the pantograph in a retracted state. .
FIG. 4 is a block diagram of a boom operation control device according to the present invention.
FIG. 5 shows a first interference region set in the boom operation control apparatus according to the present invention, wherein FIG. 5 (a) is a plan view of the first interference region, and FIG. 5 (b) is a diagram of the first interference region. It is a side view.
6A and 6B show a second interference area set in the boom operation control apparatus according to the present invention. FIG. 6A is a plan view of the second interference area, and FIG. It is a side view.
[Explanation of symbols]
1 Railroad high altitude work vehicle (track work vehicle)
10 body
11 Driver's seat
12 chassis
23 Hoisting cylinder (Boom actuator)
24 slewing motor (boom actuator)
25 Telescopic cylinder (boom actuator)
30 boom
40 workbench
50 Boom operation control device
53 Boom position detection sensor
63 Pantograph posture detection sensor (pantograph position detection sensor)
71 Operation control circuit (boom operation control means)
73 Interference area selection circuit (interference area selection means)
75 memory (interference area setting means)
150 pantograph
155 Overhang spring (punter actuator)
156 Lowering cylinder (punter actuator)
W1 first interference area
W2 Second interference area
R orbit
T trolley wire

Claims (2)

A vehicle body equipped with a chassis behind the driver's seat and capable of traveling on the track,
A boom which is provided on the chassis so as to be pivotable and movable up and down, and is provided with a work table at a distal end portion and configured to be freely extendable and retracted;
A boom actuator for driving the boom;
A pantograph that is provided above the driver's seat and can be vertically expanded and contracted between an extended position that contacts a trolley wire stretched above the track and a storage position that is stored above the driver's seat;
Pantograph position detecting means for detecting the expansion / contraction position of the pantograph;
Boom position detecting means for detecting an operating position of the boom with respect to the chassis;
When the pantograph is in the extended position, the boom and the work table may interfere with the pantograph, and when the pantograph is in the retracted position, the boom and the work table are Interference area setting means for setting a second interference area that may interfere with the pantograph;
Interference area selection means for selecting one of the first interference area and the second interference area according to a signal from the pantograph position detection means;
A boom operation control means for controlling the operation of the boom actuator so as to restrict the movement of the boom into the first interference area or the second interference area selected by the interference area selection means. A boom operation control device for an orbital work vehicle. A pantograph actuator that expands and contracts the pantograph;
The boom operation control means is detected when the pantograph position detecting means detects that the panter is in the retracted position, and the boom operating position detected by the boom position detecting means is within the first interference region. The boom operation control device for a track work vehicle according to claim 1, wherein the operation of the pantograph actuator for extending the pantograph is restricted.

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