JP3966652B2 - Track work vehicle - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a track work vehicle, and more particularly to a track work vehicle that has a work device on the body of a track running vehicle that runs on a train track and that runs on the train track and performs work by the work device. .
[0002]
[Prior art]
As the track work vehicle, for example, there is a track work height work vehicle having a height work device on the body of the track travel vehicle. For example, a track running height working device is configured by arranging a boom that can turn, undulate, and extend and retract on a vehicle body, and a work table on which an operator rides is attached to the tip of the boom. Thus, the work table can be moved to a desired height position. This orbital high-altitude work vehicle travels on the track to move to the work site, moves the work table on which the operator is boarded to the desired high-altitude position, and maintenance / inspection of the trolley wire by the operator Work is performed.
[0003]
By the way, a current supplied to the train normally flows through the trolley wire, and if maintenance / inspection work or the like of the trolley wire is performed in this energized state, there is a possibility that an operator may get an electric shock. For this reason, in general, the work is performed after the power supply to the trolley wire in the work section is stopped before the work.
[0004]
However, even if the power supply is stopped, there is residual voltage on the trolley line, power is accidentally supplied to the trolley line during work, or power is supplied beyond the work section where the power supply is stopped. When a work vehicle enters a certain section, there is a risk of an electric shock from an operator on the work table. Therefore, the vehicle body of the vehicle has an electric shock prevention device having a conductive contact member capable of coming into contact with and in contact with the trolley wire, and a grounding circuit that electrically connects the contact member and the track running wheel. Vehicles have been proposed. Thereby, the residual voltage can be lowered by flowing a current due to the residual voltage of the trolley wire to the track side (ground side) via the ground circuit. Also, when power is supplied to the trolley wire during work, or when a work vehicle enters the section where power is being supplied, the trolley wire is short-circuited to the track side via the ground circuit. The power supply to the trolley line can be stopped by operating the circuit breaker at the station.
[0005]
[Problems to be solved by the invention]
However, even if the work vehicle has an electric shock prevention device, if the grounding work that reduces the residual voltage of the trolley wire by making the contact member contact the trolley wire before working is mistakenly carried on the work table There is a risk that the worker who has done this will receive an electric shock. In addition, since the lifting / lowering movement of the workbench can be operated independently regardless of the operation of the electric shock prevention device, the work table is moved before the electric shock prevention device is grounded and remains on the trolley wire. When voltage is present, there is a problem that an operator on the workbench may be electrocuted.
[0006]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a track work vehicle in which there is no possibility of an electric shock from an operator on the work table even when the electric shock prevention device is erroneously operated.
[0007]
[Means for Solving the Problems]
  In order to solve the above-described problems, a track work vehicle according to the present invention is a track work vehicle that travels on a train track having a rail for a train track and a power supply trolley wire disposed above the rail. (For example, a track height working vehicle 1 in the embodiment), and a track traveling vehicle having a track traveling wheel (for example, the iron wheel 29 in the embodiment) made of a conductive material that travels on a rail, and a track traveling vehicle. Working devices (for example, the telescopic boom 17 and the work table 25 in the embodiment) provided on the vehicle body and actuators for moving the working devices up and down (for example, the telescopic cylinder 19 and the hoisting cylinder 21 in the embodiment). And can be moved up and down on the vehicle body or work equipment.AndA contact member that can contact and contact with the loli wire and has conductivity (for example, the ground plate 45 in the embodiment);A grounding circuit (for example, the grounding switch 49, the first grounding wire 81, the second grounding wire 83, and the third grounding wire 84 in the embodiment) for electrically connecting the contact member and the track running wheel;Contact member contacts the trolley wireDo you know itDetermine whether or notSizeFixing means (for example, the contact contact determination circuit 98 in the embodiment) and, SizeThe contact member comes into contact with the trolley wire by the fixing means.is doingUnless otherwise determined, actuator operation restricting means for restricting the operation of the actuator (for example, the telescopic cylinder 19 and the undulating cylinder 21 in the embodiment) in the direction in which the work device approaches the trolley line side (for example, the operation restriction circuit in the embodiment) 99).
[0008]
  According to the track work vehicle configured in this way, SizeThe contact member comes into contact with the trolley wire by the fixing means.is doingIf it is not determined, the actuator operation restricting means restricts the operation of the actuator in the direction in which the work device approaches the trolley line. For this reason,Bring the contact member into contact with the trolley wireWorkers can not work without static elimination work.ButThe risk of electric shock can be prevented beforehand.
[0009]
  In the track work vehicle according to the first aspect of the present invention, the determination means includes:It is composed of a pressing mechanism that presses the contact member against the trolley wire and makes contact, and a load detection means that detects the force that the contact member receives from the trolley wire, and the force detected by the load detection means exceeds a predetermined value. When the contact member is in contact with the trolley wire.The
  In the track work vehicle according to the second aspect of the present invention,The determining means includes position determining means for detecting whether the contact member moves up and down and determines whether or not the contact member is in contact with and in contact with the trolley wire. It is configured to determine that the contact member is in contact with the trolley wire when it is determined to be in the contact-contact position.Yes.
[0010]
  In addition, the track work vehicle described above is provided between the contact member and the track running wheel.TouchIn parallel with ground circuitElectricallyA connected detection circuit (for example, the first voltage detection line 85, the second voltage detection line 86, the third voltage detection line 87, and the voltage detection changeover switch 88 in the embodiment), a contact member provided on the detection circuit, and a track running Voltage detecting means for detecting the voltage between the wheels for use (for example, voltage detector 53 in the embodiment) and wheel contact determination means for determining whether or not the track running wheel is in contact with the rail (for example, implementation) An iron ring contact determination circuit 100)AndThe wheel for track running is in contact with the rail by the wheel contact determination means.DeterminedStateAtWhen the voltage value detected by the pressure detection means exceeds a predetermined value,And sizeThe contact member comes into contact with the trolley wire by the fixing means.is doingThe state of judgingAtWhen the voltage detected by the pressure detector exceeds the specified valueIn at least one of the casesThe actuator operation restricting means may restrict the operation of the actuator in the direction in which the work device approaches the trolley line.
[0011]
  The wheel for track running is in contact with the rail by the wheel contact determination means.DeterminedStateAtWhen the voltage value detected by the pressure detection means exceeds a predetermined value, for example, when the contact member is in poor contact with the trolley wire, there is a possibility that a residual voltage remains on the trolley wire. In this case, the actuator operation restricting means restricts the operation of the actuator in the direction in which the work device approaches the trolley line. Also, SizeThe contact member is in contact with the trolley wire by the fixing means.I thinkIf the voltage value detected by the voltage detecting means exceeds a predetermined value in a fixed state, for example, if the ground circuit is electrically connected poorly, there is a possibility that a residual voltage may remain on the trolley wire. In this case, the actuator operation restricting means restricts the operation of the actuator in the direction in which the work device approaches the trolley line.The
[0012]
  in this wayBy providing the determination means, it is possible to determine whether or not the contact member is in contact with the trolley wire, and it is possible to determine whether or not the track traveling wheel is in contact with the rail. In addition, by providing a detection circuit and voltage detection means, even if a contact failure of the contact member to the trolley wire or an electrical connection failure between the contact member and the rail occurs, a residual voltage remaining on the trolley wire by the voltage detection means. The operator's electric shock can be prevented in advance by reliably determining the presence or absence of the actuator and restricting the operation of the actuator.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. The present embodiment shows an aspect of an orbital aerial work platform that is driven to rotate by contacting a track traveling wheel with the rail when traveling on a rail for a train track. FIG. 1 shows a track and field work vehicle of the present invention. As shown in FIG. 1, the track-and-terrain work vehicle 1 is configured with a truck traveling on a road as a base, and has a driving cabin 5 in front of the vehicle body 3, and a front wheel below the driving cabin 5. A (road driving front wheel) 7 is provided, and a rear wheel (road driving rear wheel) 9 is provided below the rear side of the vehicle body 3. The rear wheel 9 is connected to an engine (not shown) provided on the vehicle body 3 and is configured such that the rear wheel 9 is rotationally driven by the driving force of the engine. Outrigger jacks 11 that stably support the vehicle body 3 by grounding the front end portions are provided behind the front wheels 7 and the rear wheels 9, respectively. A center jack (not shown) that lifts the railroad work vehicle 1 itself is provided at a substantially central lower portion of the vehicle body 3.
[0014]
A swivel base 13 capable of swiveling is provided at the upper rear end of the vehicle body 3, and a swivel motor 15 is provided in the car body 3 below the swivel base 13. Is configured to do. A base end portion of the telescopic boom 17 is pivotally connected to the upper portion of the swivel base 13. A telescopic cylinder 19 is built in the telescopic boom 17, and the telescopic boom 17 is configured to telescopically operate when the telescopic cylinder 19 is telescopically operated. Both ends of the hoisting cylinder 21 are pivotally connected between the lower surface of the telescopic boom 17 and the bottom of the swivel base 13, and the telescopic boom 17 is configured to hoist when the hoisting cylinder 21 is extended.
[0015]
The swing motor 15, the undulating cylinder 21, and the telescopic cylinder 19 are driven via a PTO mechanism (not shown) that extracts the driving force of the engine, and a hydraulic pump (not shown) is rotationally driven by the extracted driving force. By controlling the supply of hydraulic oil discharged from the hydraulic pump, the turning motor 15, the hoisting cylinder 21, and the telescopic cylinder 19 are operated. Here, the ON / OFF operation of the PTO mechanism is performed by a switching operation of a PTO selector switch 22 provided in the operation cabin 5.
[0016]
A rod-like worktable support member 23 pivotally pivotable in the vertical direction is pivotally connected to the distal end portion of the telescopic boom 17. A work table 25 on which an operator can board is mounted on the work table support member 23. A leveling cylinder (not shown) is built in the distal end portion of the telescopic boom 17, and the distal end portion of the leveling cylinder is pivotally connected to the lower end portion of the work table support member 23. The leveling cylinder operates in conjunction with the raising / lowering operation of the telescopic boom 17 and always keeps the work table support member 23 in a vertical state. For this reason, the work table 25 is always held in a horizontal state. A boom operating device 27 for operating the hoisting cylinder 21, the telescopic cylinder 19, and the swing motor 15 is disposed on the work table 25, and a trolley wire T is disposed above the operation cabin 5 for work on the rail R. A grounding operation device 43 that operates a grounding device 41 that releases the remaining electricity to the rail R is provided.
[0017]
At each rear of the outrigger jacks 11 at the front and rear of the vehicle body 3, an iron wheel 29 is provided in a state of being rotatably held by an iron wheel holding frame 31. The iron wheel holding frame 31 is pivotally supported so as to extend and retract with respect to the support frame 33 fixed to the vehicle body 3, and the iron wheel 29 projects onto the rail R by the expansion and contraction operation of the iron wheel lifting cylinder (not shown). Or stored.
[0018]
The roadside altitude work vehicle 1 has an electric shock prevention device 40 for preventing an electric shock of an operator who is on the work table 25, and the entire structure of the electric shock prevention device 40 will be described with reference to FIG. The electric shock prevention device 40 includes an urging device 47 that urges the slot plate 45 toward the trolley wire T, and a ground changeover switch 49 for causing electricity remaining on the trolley wire T to flow to either the left rail LR or the right rail RR. The first and second continuity check detectors 51 and 52 for detecting whether or not the iron wheel 29 shown in FIG. 1 is in contact with the rail R and the potential difference between the slot plate 45 and the rail R are detected. The voltage detector 53, the controller 55 for controlling the operation of the telescopic boom 17 shown in FIG. 1, and the hoisting cylinder 21 and the telescopic cylinder 19 for moving the work table 25 shown in FIG.
[0019]
As shown in FIG. 1, the urging device 41 includes a support member 57 that protrudes upward from the vehicle body 3 immediately behind the driving cabin 5 and bends upward from the driving cabin 5, and a front end portion of the supporting member 57. A plate-like lower base 59 that extends substantially horizontally above the operating cabin 5, a scissor link mechanism 61 that expands and contracts vertically on the lower base 59, and an upper end of the scissor link mechanism 61. A plate-like upper base 63 attached to the upper part and a grounding pantograph 65 attached to the upper base 63 are configured.
[0020]
The scissor link mechanism 61 includes a pair of link mechanisms 67 provided at both ends of the lower base 59 in the left-right direction of the vehicle body, and a lifting cylinder (not shown) that expands and contracts the link mechanism 67 in the vertical direction. . The link mechanism 67 pivotally connects the intermediate portions of the two rod-shaped link members 69, and both ends of one link member 69 pivot to the lower base 59 and the upper base 63, and the other link member 69. Both end portions are connected to the lower base 59 and the upper base 63 so as to be slidable in the front-rear direction. For this reason, when the two link members 69 fall down, the link mechanism 67 contracts and expands, and the scissor link mechanism 61 expands and contracts in the vertical direction.
[0021]
The grounding pantograph 65 includes a base 71 mounted on the upper base 63, a first arm 73 provided on the base 71 so as to be swingable in the vertical direction, and a vertical direction at the tip of the first arm 73. A second arm 75 slidably provided on the top, a third arm 77 slidably provided on the tip of the second arm 75 in the vertical direction, and a slot attached to the tip of the third arm 77. It has a plate 45 and is configured to be able to bend and extend. The first arm 73 to the third arm 77 are provided with a pressing mechanism having a damper or the like (not shown), and the grounding pantograph 65 is locked in a folded state. When the lock is released, the pressing mechanism automatically moves upward. It bends and stretches, and always urges the slot plate 45 to the trolley line T with a predetermined force. The base 71 is provided with a load detection sensor 79 for detecting a force acting on the slot 45 from the trolley line T in order to determine whether the slot 45 is in contact with and in contact with the trolley line T. . Instead of the load detection sensor 79, a stroke sensor that detects the extension amount of the lifting cylinder can be used. In this case, the extension amount of the lifting cylinder and the positional relationship in the vertical direction of the slot plate 45 are determined in advance, and if the detected extension amount exceeds a predetermined value, the slot plate 45 contacts the trolley wire T. The controller 55 shown in FIG.
[0022]
A first ground line 81 is connected to the slot plate 45 shown in FIG. On the other hand, the second and third ground wires 83 and 84 are connected to the left and right wheel members 82L and 82R constituting the rear iron wheel 29R via rotating brushes. The left and right wheel members 82L and 82R roll on the left and right rails LR and RR, respectively, but the left and right wheel members 82L and 82R are electrically insulated by an insulating portion 82a. For this reason, the second and third ground wires 83 and 84 are electrically connected to the left and right rails LR and RR via the left and right wheel members 82L and 82R, respectively. The first ground line 81 is provided with a ground switch 49, and when the ground switch 49 is switched, the first ground line 81 is connected to the second or third ground lines 83 and 84. The ground change switch 49 is operated by operating the ground change lever 49L.
[0023]
A first voltage detection line 85 connected separately from the first ground line 81 is connected to the slot plate 45, and the left and right wheel members 82L, 82R are connected to the second and third voltage detection lines 86, 86 via rotating brushes. 87 is connected. A voltage detection changeover switch 88 is provided between the first voltage detection line 85 and the second and third voltage detection lines 86, 87. When the voltage detection changeover switch 88 is switched, the first voltage detection line 85 and the second voltage detection line are switched. The detection line 86 or the third voltage detection line 87 is connected. The voltage detection changeover switch 88 operates in conjunction with the ground changeover switch 49. That is, when the ground selector switch 49 is operated so that the first ground line 81 and the second ground line 83 are connected, the voltage detection selector switch 88 so that the first voltage detection line 85 and the second voltage detection line 86 are connected. When the ground selector switch 49 is operated so that the first ground line 81 and the third ground line 84 are connected, the voltage detection switching is performed so that the first voltage detection line 85 and the third voltage detection line 87 are connected. When the switch 88 is activated and the ground selector switch 49 is in the neutral state, the state of the voltage detection selector switch 88 corresponding to the state before the ground selector switch 49 is in the neutral state is maintained. The first voltage detection line 85 is provided with a resistor 89, and a voltage detector 53 for detecting a potential difference between both ends when a current flows through the resistor 89 is attached to both ends of the resistor 89. .
[0024]
First and second contact lines 90 and 91 are connected to the left and right wheel members 82L and 82R constituting the front iron wheel 29F via a rotating brush. Since the front iron wheel 29F has the same configuration as the rear iron wheel 29R, description thereof is omitted. Further, third and fourth contact wires 92, 93 are connected to the left and right wheel members 82L, 82R constituting the rear iron wheel 29R via a rotating brush. Between the 1st and 3rd contact lines 90 and 92 and the 2nd and 4th contact lines 91 and 93, the 1st and 2nd contact switches 94 and 95 which connect or intercept these are provided, respectively. The first and second contact switches 94 and 95 are configured to operate by operating the contact switching lever 96, and when one contact switch is turned on, the other contact switch is turned off. First and second continuity check detectors 51 and 52 are provided on the third contact line 92 and the fourth contact line 93. When the first abutment switch 94 is turned on when the front iron wheel 29F and the rear iron wheel 29R are in contact with the rail LR, the first continuity check detector 51 has the front iron wheel 29F / rear iron wheel 29R / rail R / first. The third contact lines 90 and 92 form a closed circuit to detect that the continuity check detector 51 is conductive. The detection of continuity means that the front iron wheel 29F and the rear iron wheel 29R are in contact with the rail R. The second continuity check detector 52 has the same function as that of the first continuity check detector 51, and therefore the description thereof is omitted.
[0025]
Next, the controller 55 will be described. The controller 55 includes an operation control circuit 97, a contact contact determination circuit 98, an operation restriction circuit 99, an iron wheel contact determination circuit 100, and a voltage determination circuit 101. The operation control circuit 97 controls the operation of the operation control valve 37 that controls the operation of the swing motor 15, the hoisting cylinder 21, the telescopic cylinder 19, and the lifting cylinder 35 based on operation signals from the boom operation device 27 and the ground operation device 43. When the load value from the load detection sensor 79 exceeds a predetermined value, the contact contact determination circuit 98 determines that the slot 5 is in contact with the trolley wire T, and the result is an operation restriction circuit. Send to 99. When the first or second continuity check detectors 51 and 52 output a detection value indicating that the first or second continuity check detectors 51 and 52 are conductive, the front wheel 29F and the rear wheel 29R are in contact with the rail R. And the result is sent to the operation regulating circuit 99.
[0026]
The voltage determination circuit 101 determines whether or not the voltage value detected by the voltage detector 53 exceeds a predetermined value (usually 0 V), and sends the result to the operation restriction circuit 99. In the operation restricting circuit 99, the slot plate 45 is in contact with the trolley wire T before the telescopic boom 17 is lifted from the state where the PTO changeover switch 22 is operated and the driving force of the engine is taken out. When the determination result of the abutting contact determination circuit 98 is not received, {circle around (2)} the front iron wheel 29F and the rear iron wheel 29R are rails while the PTO changeover switch 22 is operated and the driving force of the engine is taken out. When the determination result of the iron wheel contact determination circuit 98 indicating that the contact is on R is received, when the determination result that the voltage determination circuit 101 exceeds the predetermined value is received, (3) PTO changeover switch 22 is operated and the driving force of the engine is taken out. When the contact contact determination circuit 98 receives a determination result indicating that the slot plate 45 is in contact with the trolley wire T, the voltage determination is performed. When the determination result that the circuit 101 exceeds the predetermined value is received, the operation of the operation control valves 37 and 37 connected to the hoisting cylinder 21 and the telescopic cylinder 19 in the direction to raise the work table 25 to the trolley line T side. To regulate.
[0027]
The operation control valve 37, the boom operation device 27, the ground operation device 43, the load detection sensor 79, the operation restriction release switch 38, and the PTO changeover switch 22 are electrically connected to the controller 55. The operation restriction release switch 38 is operated when it is desired to release the upward movement restriction of the work table 25 by the operation restriction circuit 99.
[0028]
Next, the operation of the track-and-terrain work vehicle 1 of the present invention will be described. First, the work table 25 is stored on the vehicle body 3 shown in FIG. 1, the grounding pantograph 65 is stored on the base 71, the scissor link mechanism 61 is reduced, and the grounding device 41 is stored on the lower substrate 59. . Then, the roadside rear wheel 9 that is grounded on the road is rotationally driven to move the roadway work vehicle 1 to a railroad crossing close to the work site. Then, the vehicle is placed on the rail R, the iron wheel holding frame 31 is extended from the support frame 33, the iron wheel 29 is brought into contact with the rail R, and the road front wheel 7 and the rear wheel 9 are moved from the rail R. Set the unit apart upward. Then, the steel wheel 29 is driven to rotate, and the vehicle moves along the rail R to the work site.
[0029]
When the vehicle arrives at the work site, the operator switches the changeover switch 22 to take out the driving force of the engine so that the telescopic boom 17 can be operated, and then the operator gets out of the driving cabin 5 and works via the vehicle body 3. Board the board 25. Then, the ground switch 49L is operated to place the ground switch 49 in a neutral state, and the electrical connection between the slot plate 45 and the rear iron wheel 29R is cut off. Then, the operator operates the contact switching lever 96 to turn on the first contact switch 94 to connect the first and third contact lines 90 and 92. When the first and third contact wires 90 and 92 are connected, the first continuity check detector 51 outputs a continuity signal indicating that the continuity is present, and this continuity signal is sent to the iron wheel contact determination circuit 100. The iron wheel contact determination circuit 100 determines that the front iron wheel 29F and the rear iron wheel 29R are in contact with the rail LR based on the conduction signal, and sends the result to the operation restriction circuit 99.
[0030]
Then, the operator operates the ground switching lever 49L to operate the ground switching switch 49 to connect the first ground line 81 and the second ground line 83. At the same time, the first contact switch 94 is turned off, and the first contact line 90 and the third contact line 92 are cut off. Thereby, the possibility that a large current flows through the first continuity check detector 51 can be prevented, and the first continuity check detector 51 can be protected. When the ground switch 49 is activated, the voltage detection switch 88 is activated, the first voltage detection line 85 and the second voltage detection line 86 are connected, and the slot plate 45 and the rear iron wheel 29R are electrically connected.
[0031]
Then, the operator operates the grounding operation device 43 to extend the lifting cylinder 35 and bends and stretches the grounding pantograph 65 shown in FIG. 1 to move the slot plate 45 upward and contact the trolley wire T. Let At the same time, the load detection sensor 79 detects the magnitude of the force acting on the slot plate 45 from the trolley wire T, and this detection value is sent to the contact contact determination circuit 98, and the contact contact is made based on this detection value. The determination circuit 98 determines that the detected value exceeds the predetermined value, and sends the result to the operation restriction circuit 99. When a stroke sensor is used instead of the load detection sensor 79, the stroke value of the stroke sensor is sent to the contact contact determination circuit 98, and the contact contact determination circuit 98 determines that the stroke value exceeds a predetermined value. The result is sent to the operation regulating circuit 99.
[0032]
Here, the detected voltage value detected by the voltage detector 53 is sent to the voltage determination circuit 101, and the voltage determination circuit 101 compares the detected voltage value with a predetermined value, and the detected voltage value exceeds the predetermined value. The determination result is sent to the operation regulation circuit 99. Based on the contact determination result of the contact contact determination circuit 98, the contact determination result of the iron wheel contact determination circuit 100, and the determination result that the detected voltage value of the voltage determination circuit 101 exceeds a predetermined value, the operation restriction circuit 99 is undulated. The operation of the operation control valve 37 for extending the cylinder 21 is restricted.
[0033]
If the contact contact determination circuit 98 makes contact determination and the iron wheel contact determination circuit 100 makes contact determination, the charges remaining on the trolley line T are usually the first ground line 81 and the second ground line. 83 and flows into the rail LR. However, when the first ground wire 81 and the second ground wire 83 are in poor contact or the second ground wire 83 is in poor contact with the rear iron wheel 29R, the electrical connection between the trolley wire T and the rear iron wheel 29R is not possible. Insufficient charge is left on the trolley wire T. If the worker works on the work table 25 without knowing such a state, there is a risk of electric shock. Therefore, the first and second voltage detections having the resistor 89 in parallel with the first and second ground lines 81 and 83 are possible. The lines 85 and 86 are provided, and the voltage between the resistors 89 is detected by the voltage detector 53, whereby the residual voltage remaining on the trolley line T can be detected. If there is a residual voltage, the operation restriction circuit 99 restricts the extension operation of the telescopic cylinder 19 and the undulation cylinder 21. For this reason, by detecting the residual voltage with the voltage detector 53, it is possible to detect the residual voltage of the trolley wire T due to poor contact, and to prevent electric shock of the operator.
[0034]
In addition, while the work table 25 is stored in the vehicle body 3, the operator contacts the contact plate 45 with the trolley wire T, but forgets to operate the ground switching lever 49 </ b> L and between the contact plate 45 and the rear iron wheel 29 </ b> R. Are not electrically connected to each other, the contact contact determination circuit 98 determines contact, and the voltage determination circuit 101 determines that the detected voltage value exceeds a predetermined value. Based on the above, the operation restricting circuit 99 restricts the operation of the operation control valve 37 for extending the telescopic cylinder 19 and the undulating cylinder 21.
[0035]
For this reason, even if the operator makes a mistake in the static elimination work, the voltage detector 53 detects the residual voltage and the operation restricting circuit 99 restricts the raising and lowering movement of the telescopic boom 17. Therefore, it is possible to reliably prevent the operator from receiving an electric shock. Can do.
[0036]
Further, in a state where the work table 25 is stored in the vehicle body 3, the boom operating device 27 is operated to expand and contract in a state where the operator forgets the operation of bringing the ground plate 45 into contact with the trolley wire T by the ground operating device 43. When the boom 17 is to be raised and lowered, the operation restriction circuit 99 restricts the operation of the operation control valve 37 for extending the hoisting cylinder 21 based on the determination result that the contact contact determination circuit 98 is not in contact. To do. That is, the work of bringing the scraper plate 45 into contact with the trolley wire T is one of the most important works in the static elimination work. Therefore, if the static elimination work is not performed before the telescopic boom 17 is activated, the operation restriction is performed. The circuit 99 regulates the lifting operation of the telescopic boom 17. For this reason, an electric shock of an operator can be prevented beforehand.
[0037]
Next, the operation of the roadside altitude work vehicle 1 when the vehicle is moved to another work site (a power outage section where no power is supplied to the trolley line T) will be described. In a power outage period in which there is no possibility of electric power being supplied to the trolley line T and there is no possibility of residual charges on the trolley line T, there is no possibility that the operator may receive an electric shock, so the operator operates the operation restriction release switch 38 to operate the operation restriction circuit. 99 operation is regulated. As a result, it is possible to prevent a situation in which the movement of the work table 25 is restricted even though it is not necessary to perform the static elimination work, and it is possible to prevent a reduction in work efficiency of the entire work.
[0038]
【The invention's effect】
  According to the track vehicle for work vehicles according to the present invention,, SizeThe contact member comes into contact with the trolley wire by the fixing means.is doingIf it is not determined, the actuator operation restricting means restricts the operation of the actuator in the direction in which the work device approaches the trolley line side,Bring the contact member into contact with the trolley wireSince the work cannot be performed unless the static elimination work is performed, it is possible to prevent the operator from getting an electric shock.
[0039]
  In the present invention, it is further determined that the contact member is in contact with the trolley wire when the force detected by the load detection means exceeds a predetermined value when the determination means includes a pressing mechanism and a load detection means. The position determining means determines whether the contact member is in a position where the contact member is in contact with the trolley line, and the position determination means makes contact with the trolley line. It is configured to determine that the contact member is in contact with the trolley wire when it is determined to be in the position.is doing.Thereby, even if a track work vehicle is placed in an area where the height of the trolley wire is changed, the contact contact of the contact member can be reliably determined.
[0040]
  Further, the detection voltage value exceeds a predetermined value in a state where the wheel contact determination means determines contact on the rail of the track traveling wheel.IfJudgment meansByContact memberButTrolley wireWhatDetermined to be in contactIn the stateWhen the detected voltage value exceeds the specified valueIn at least one of the following cases:Actuator operation restricting means restricts the operation of the actuator in the direction in which the work device approaches the trolley wire sideIs preferred. ThisIf the grounding circuit is a contact member,Even if you make a mistakeSince the voltage detecting means detects the residual charge of the trolley wire and the actuator operation restricting means restricts the operation of the actuator, it is possible to prevent the operator from getting an electric shock.
[Brief description of the drawings]
FIG. 1 shows a front view of a track height work vehicle according to an embodiment of the present invention.
FIG. 2 is an overall configuration diagram of an electric shock prevention device for an orbital work platform according to an embodiment of the present invention.
[Explanation of symbols]
1 Track height work vehicle (track work vehicle)
3 body
17 Telescopic boom (working device)
19 Telescopic cylinder (actuator)
21 Undulating cylinder (actuator)
25 Work table (work equipment)
29 Iron Wheel (Railway Wheel)
45 Slot plate (contact member)
49 Grounding switch (grounding circuit)
51 First continuity check detector (wheel contact determination means)
52 Second continuity check detector (wheel contact determination means)
53 Voltage detector (voltage detection means)
81 First ground wire (ground circuit)
83 Second ground wire (ground circuit)
84 Third ground line (ground circuit)
85 First voltage detection line (detection circuit)
86 Second voltage detection line (detection circuit)
87 Third voltage detection line (detection circuit)
88 Voltage detection selector switch (detection circuit)
98 Contact contact determination circuit (position determination means, contact contact determination means)
99 Operation restriction circuit (Actuator operation restriction means)
100 Iron wheel contact determination circuit (wheel contact determination means)
R rail
T trolley wire

Claims (3)

A track working vehicle that travels on a train track having a rail for a train track and a power supply trolley wire disposed above the rail,
A track traveling vehicle having a track traveling wheel made of a conductive material traveling on the rail; and
A working device provided on the vehicle body of the track vehicle so as to be movable up and down;
An actuator for moving the working device up and down;
A contact member that is provided on the vehicle body or the work device so as to be movable up and down, is in contact with the trolley wire, and has conductivity;
A grounding circuit that electrically connects the contact member and the track running wheel;
Determination means for determining whether or not the contact member is in contact with the trolley wire;
As long as the said contact member by judging means is not determined to be abutting contact with the contact wire, and an actuator actuating regulating means for regulating the operation of said actuator in a direction to approach the working device to the trolley wire side Have
The determination unit includes a pressing mechanism that presses and contacts the contact member against the trolley wire, and a load detection unit that detects a force that the contact member receives from the trolley wire. A track work vehicle configured to determine that the contact member is in contact with the trolley wire when the detected force exceeds a predetermined value. A track working vehicle that travels on a train track having a rail for a train track and a power supply trolley wire disposed above the rail,
A track traveling vehicle having a track traveling wheel made of a conductive material traveling on the rail; and
A working device provided on the vehicle body of the track vehicle so as to be movable up and down;
An actuator for moving the working device up and down;
A contact member that is provided on the vehicle body or the work device so as to be movable up and down, is in contact with the trolley wire, and has conductivity;
A grounding circuit that electrically connects the contact member and the track running wheel;
Determination means for determining whether or not the contact member is in contact with the trolley wire;
Actuator operation restricting means for restricting the operation of the actuator in a direction in which the working device approaches the trolley wire side unless the contact means is determined to be in contact with and contact with the trolley wire by the determining means. Have
The determination means includes position determination means for detecting whether the contact member moves up and down and determines whether the contact member is in contact with the trolley wire. when the contact member is determined to be in a position abutting contact with the trolley wire, you, wherein the contact member is configured to determine that contact the contact wire and contact orbit work vehicle. A detection circuit electrically connected in parallel with the grounding circuit between the contact member and the track traveling wheel, and a voltage detection provided in the detection circuit for detecting a voltage between the contact member and the track traveling wheel. Means and wheel contact determination means for determining whether or not the track running wheel is in contact with the rail,
The voltage detected by the voltage detection means exceeds a predetermined value when the wheel contact determination means determines that the track running wheel is in contact with the rail; and the determination When the voltage value detected by the voltage detecting means exceeds a predetermined value in a state where it is determined that the contact member is in contact with and in contact with the trolley wire by means, at least in any case 3. The track work vehicle according to claim 1 or 2 , wherein the actuator operation restricting means restricts the operation of the actuator in a direction in which the work device is brought closer to the trolley line side.

Images