JP5972004B2 - Railroad car - Google Patents

Description

  The present invention relates to a track-and-rail vehicle that includes a wheel for traveling on a road and a steel wheel for running on a track, and that travels on a track by projecting downward a pair of iron wheels that are provided in front and rear of a vehicle body in a width direction.

  In conventional track and land vehicles, the iron wheels are fixed to the vehicle body when traveling by rails provided on the left and right sides of the vehicle body, so if there is a height difference between the left and right and front and rear rails, There was a problem that the iron wheel did not contact the rail.

  In order to solve such a problem, Patent Document 1 discloses that a holding bracket that supports an iron wheel is provided so as to be movable up and down between a normal position and a further downward movement position, and is always moved downward by an urging means. A track-and-rail vehicle that is biased toward a position is disclosed. In such a track-and-rail vehicle, even if there is a height difference between the left and right and front and rear rails of the running track, the holding bracket that supports the iron wheel is always biased downward, so the iron wheel floats off the track. There is no end.

JP-A-11-268509

  In this way, when the iron wheel is always movable up and down, one holding bracket is in the normal position when working on a track with a difference in height between the left and right rails without using the outrigger. The iron wheel supported by the bracket supports the vehicle body without depending on the urging force of the urging means. On the other hand, since the other holding bracket is in the downward movement position, the iron wheel supported by the holding bracket continues to support the vehicle body by the urging force of the urging means. Therefore, this urging force continues to assist the force that pushes the vehicle body on the high rail side upward and causes the vehicle body to fall to the low rail side, and the stability of the vehicle body during work on the track decreases. There is a risk of it.

For such a problem, it can be considered that the iron wheel can be switched between a state in which the steel wheel can be moved up and down and a state in which the vertical motion is locked. Thereby, when carrying out track running, the iron wheel is made to move up and down freely, and when working on the track, the up and down movement of the iron wheel is locked.
However, when the vertical movement of the iron wheel is locked, if there is a problem with the controller that controls the vertical movement lock of the iron wheel or the detector that checks the drive of each part, etc., unlock the vertical movement of the iron wheel. It becomes impossible to do. For this reason, it becomes impossible to travel on the track quickly, and it may be difficult to escape the track vehicle from the track in an emergency.

  Therefore, an object of the present invention is to provide a track-and-rail vehicle that can travel safely in an emergency.

A track-and-rail vehicle according to a first aspect of the present invention includes a wheel for traveling on a road and an iron wheel for running on a track, and by projecting downward a pair of iron wheels that are provided on both front and rear sides of the vehicle body in the width direction. A track-and-rail vehicle that travels in an orbit, and by making at least one of the left and right iron wheels in the front-rear direction move up and down, the iron wheel up-and-down mechanism that can move to different heights relative to the vehicle body, The iron wheel lock mechanism that locks the vertical movement of the iron wheel by the mechanism, the lock of the iron wheel vertical movement by the iron ring lock mechanism, the switching control means for switching the lock release, and the switching control means are separate and independent circuits. without using the control means includes a lock release circuit which unlock the vertical movement of the iron ring by steel wheel locking mechanism, and emergency track traveling operating means for operating the emergency track traveling, the unlocking times , When the emergency track traveling operation means is operated, characterized in that to unlock the vertical movement of the iron ring by steel wheels locking mechanism.

Further, road-rail vehicle according to the second invention is a road-rail vehicle according to the first inventions, iron wheels lock mechanism includes a hydraulic pump that discharges hydraulic oil, by hydraulic oil supplied from the hydraulic pump, steel wheels And a solenoid valve that controls the flow direction of hydraulic fluid between the hydraulic pump and the locking actuator, and the unlocking circuit is provided between the hydraulic pump and the locking actuator by the solenoid valve. By switching the flow direction of the hydraulic oil, the lock of the vertical movement of the iron wheel by the locking actuator is released.

  According to the present invention, since the lock release circuit for unlocking the vertical movement of the iron wheel is provided independently from the switching means for switching the lock and release of the vertical movement of the iron wheel, even in an emergency, It is possible to securely release the lock of the vertical movement and travel safely.

It is a side view which shows an example of a railroad vehicle. It is a front view which shows an example of a rocking | fluctuation frame. FIG. 3 is a hydraulic circuit diagram showing an example of a swing frame locking hydraulic circuit. It is a block diagram which shows an example of the control which concerns on a rocking | fluctuation frame lock control circuit. It is a flowchart which shows an example of a rocking | fluctuation frame lock process. It is a flowchart which shows an example of a rocking | fluctuation frame lock release process. It is a flowchart which shows an example of a rocking | fluctuation frame lock emergency cancellation | release process.

  1 to 7 show an embodiment of the present invention.

  In this embodiment, when an iron wheel for track traveling is extended from a track and land vehicle and brought into contact with the track R, a road traveling wheel rises from the track R, and the vehicle body is equipped with an aerial work machine equipped with a boom or the like. An example of the type of track-and-rail vehicle will be described. In addition, the railroad work vehicle may be a vehicle equipped with a crane work machine, a machine equipped with a digging pillar machine, etc., in addition to a work machine equipped with an aerial work machine.

(Configuration of railcar)
As shown in FIG. 1, the track-and-rail vehicle 1 of the present invention is configured based on a truck vehicle having a driving cab 2 at the front portion, and road traveling wheels 6 are provided on both sides in the width direction before and after the vehicle body 3. The road traveling wheels 6 are driven by an engine E installed at the lower portion of the driving cab 2 so that the vehicle can travel on the road.

  On the chassis frame 4 that extends in the front-rear direction of the vehicle body 3 on the rear side of the driving cab 2, a subframe 5 that extends in the front-rear direction of the vehicle body 3 is provided in the same manner as the chassis frame 4. And the steel wheel bracket 7F is supported by the steel wheel part support member 9F connected to the both sides of the lower width direction of the front side of the sub-frame 5 so that rotation is possible in the front-back direction. An orbital traveling iron wheel 8F is rotatably attached to the tip of the iron wheel bracket 7F. The iron wheel bracket 7F has a position where the track running iron wheel 8F projects and contacts the track R by extension and contraction of an unillustrated overhanging storage hydraulic cylinder 10F provided between the iron wheel bracket support member 9F and the track running iron wheel 8F. Can be moved to a position in which the vehicle body 3 is stored.

  As shown in FIG. 2, a swing frame 30 extending in the width direction is pivotally supported at a lower central portion in the width direction on the rear side of the subframe 5 via a swing shaft 31 extending in the front-rear direction. Yes. And the iron ring part support member 9B which supports the iron ring bracket 7B rotatably in the front-back direction is connected to the width direction both ends of the rocking | fluctuation frame 30. As shown in FIG. An orbital traveling iron wheel 8B is rotatably attached to the tip of the iron wheel bracket 7B. Therefore, when the swing frame 30 swings, the track traveling iron wheel 8 </ b> B moves up and down together with the steel wheel support members 9 </ b> B connected to both ends of the swing frame 30.

  The steel wheel bracket 7B has a position in which the track traveling iron wheel 8B projects and contacts the track R by the expansion and contraction of the overhanging storage hydraulic cylinder 10B provided between the steel wheel support member 9B and the track traveling iron wheel 8B. 3 can be moved to the position to be stored. The track traveling iron wheels 8F and 8B are driven by a hydraulic motor that rotates in response to supply of hydraulic oil from a hydraulic pump P that operates in response to power extracted from the engine E. Further, the iron wheel brackets 7F and 7B are provided with an overhang detection device 13 (FIG. 4) for detecting whether or not the track traveling iron wheels 8F and 8B are overhanging to the position on the track R.

  As shown in FIG. 3, a swing lock mechanism 32 for locking the swing of the swing frame 30 is provided between the upper surface of the swing frame 30 and the lower surface of the sub frame 5. The swing lock mechanism 32 includes a pair of left and right swing lock cylinders 34 and a spring 35 with the swing shaft 31 interposed therebetween, and a swing frame lock hydraulic circuit 40 for operating the swing lock cylinder 34.

  The upper end portion of the cylinder tube 36 of the swing lock cylinder 34 is fixed to the lower surface of the subframe 5. The piston rod 38 of the swing lock cylinder 34 is provided with a piston 37 at the upper end and a plate 33 at the lower end. Furthermore, a pair of contact portions 39 are provided on the upper surface of the swing frame 30 so that the lower surface of the plate 33 contacts when the swing lock cylinder 34 is extended. A spring 35 is inserted between the swing frame 30 and the plate 33. When the swing frame 30 swings, the spring 35 acts as a cushion by urging in the vertical direction. Fulfill.

  With such a configuration of the rocking lock mechanism 32, when the rocking lock cylinder 34 extends, the lower surface of the plate 33 comes into contact with the contact portion 39. As a result, the swing lock cylinder 34 projects between the lower surface of the sub frame 5 and the upper surface of the swing frame 30 to lock the swing of the swing frame 30.

  Further, the swing lock cylinder 34 is provided with a limit switch 45 for detecting full contraction of the swing lock cylinder 34, and the upper surface of the swing frame 30 is brought into contact with the plate 33 and the contact portion 39. A proximity switch 46 for detection is provided. The extension of the swing lock cylinder 34 may be detected using the limit switch 45, or the full contraction of the swing lock cylinder 34 may be detected using the proximity switch 46. Moreover, you may perform these detection using another mechanical switch and a photoelectric sensor.

  The oscillating frame locking hydraulic circuit 40 includes a hydraulic pump P, a hydraulic electromagnetic valve 41, and oscillating lock cylinders 34L and 34R, which are connected to each other by piping. The pump port of the hydraulic solenoid valve 41 is connected to the discharge oil passage 51 of the hydraulic pump P, and the tank port of the hydraulic solenoid valve 41 is connected to the discharge oil passage 52 to the tank. A relief valve 42 is provided in the discharge oil passage 51.

  The B port of the hydraulic solenoid valve 41 is connected to a first oil passage 53 that is connected to the rocking lock cylinder 34. The first oil passage 53 branches into a first oil passage 53L and a first oil passage 53R, and is connected to the left and right swing lock cylinders 34L and 34R via pilot check valves 43L and 43R, respectively.

  The A port of the hydraulic solenoid valve 41 is connected to a second oil passage 54 that supplies pilot pressure to the pilot check valve 43. The second oil passage 54 branches into a second oil passage 54L and a second oil passage 54R, and is connected to ports for supplying pilot pressure to the pilot check valves 43L and 43R, respectively. When the pilot check valves 43L and 43R are supplied with pressure oil, the hydraulic oil flows out of the rocking lock cylinders 34L and 34R into the first oil passages 53L and 53R. The second oil passage 54 is provided with a pressure switch 44 for detecting the pilot pressure.

  The hydraulic solenoid valve 41 is a solenoid valve having four-port three-position switching. When the lock solenoid SOL41a of the hydraulic solenoid valve 41 is switched to the energized state, the pump port and the B port are connected, the discharge oil passage 51 and the first The first oil passage 53 is communicated, and the tank port and the A port are connected to communicate the second oil passage 54 and the discharge oil passage 52. When the unlocking solenoid SOL41b of the hydraulic solenoid valve 41 is switched to the energized state, the pump port and the A port are connected, the discharge oil passage 51 and the second oil passage 54 are connected, and the B port and the tank port are connected. Then, the first oil passage 53 and the discharge oil passage 52 are communicated. Further, when the lock solenoid SOL41a and the lock release solenoid SOL41b are switched to the non-energized state, the pump port is closed and the supply of pressure oil from the hydraulic pump P to the first oil passage 53 and the second oil passage 54 is shut off.

  A turntable 11 for placing the rail vehicle 1 on the track R is provided at the lower center of the vehicle body 3. The turntable 11 can be expanded and contracted by expansion and contraction of a hydraulic cylinder, is configured to extend downward and support the vehicle body 3 while being able to turn the vehicle body 3 horizontally. Outrigger jacks 12 that lift and support the vehicle body 3 are provided on both sides of the vehicle body 3 in the width direction.

  On the vehicle body 3, the aerial work machine 20 described above is mounted. The aerial work machine 20 includes a swivel base 21 that is turnable at the rear part of the vehicle body 3, a telescopic boom 22 having a base end pivoted on the upper part of the swivel base 21, and a distal end side that can be raised and lowered, and a telescopic boom 22. And a workbench 23 provided so as to be swingable and swingable. The telescopic boom 22 can be raised and lowered by expansion and contraction of a hoisting cylinder 22 a provided between the swivel base 21. The work table 23 is always maintained in a horizontal posture regardless of the ups and downs of the telescopic boom 22 due to the expansion and contraction of the leveling cylinder 23 a provided between the telescopic boom 22 and the work table 23. In addition, the aerial work machine 20 is provided with a boom position detection device 24 for detecting the extension position and the undulation position of the extension boom 22 and a turning position detection device 25 for detecting the turning position of the turntable 21. (FIG. 4).

(Configuration of control means)
Next, control means for controlling rocking lock and unlocking of the rocking frame 30 will be described with reference to the block diagram shown in FIG.

  The controller 70 performs control to lock the swing of the swing frame 30 and control to unlock the swing of the swing frame 30. That is, the controller 70 performs control to switch between a state where the swing of the swing frame 30 is locked and a state where the swing is possible.

  On the input side of the controller 70, the operation unit 60 provided on the driving cab 2, the overhang detection device 13, the boom position detection device 24, the turning position detection device 25, the pressure switch 44, and the left and right swing lock cylinders are provided. The limit switches 45L and 45R and the proximity switches 46L and 46R are connected, and an operation signal and a detection signal are input to the controller 70.

  Further, a lock solenoid SOL41a and a lock release solenoid SOL41b of the hydraulic solenoid valve 41 are connected to the output side of the controller 70, and the lock solenoid SOL41a and the lock release solenoid SOL41b are energized and non-energized by a control signal from the controller 70, respectively. Switch to. The lock solenoid SOL41a and the lock release solenoid SOL41b cannot be energized at the same time.

  Further, the unlocking solenoid SOL 41 b of the hydraulic solenoid valve 41 is connected to an emergency switch 80 provided in the operation cab 2. The unlocking solenoid SOL41b and the emergency switch 80 are conducted when the emergency switch 80 is turned on, and are shut off when the emergency switch 80 is turned off.

  The emergency switch 80 is also connected to the emergency track controller 90. When the emergency switch 80 is turned on and the emergency switch 80 and the emergency track controller 90 are connected, the emergency track controller 90 is switched to the track. The traveling wheel 8 is rotationally driven to execute control for causing the rail vehicle 1 to travel on an emergency track.

(Oscillating frame lock process)
Next, the swing frame locking process for locking the swing of the swing frame 30 will be described with reference to FIG.
First, in step S <b> 1, the controller 70 determines whether or not a control signal indicating that a locking operation for locking the swing frame 30 has been performed from the operation unit 60. If the control signal for the lock operation is input, the controller 70 proceeds to step S2. If the control signal for the lock operation is not input, the controller 70 ends the swing frame locking process.

  In step S2, the controller 70 performs a process of switching the lock solenoid SOL41a of the hydraulic solenoid valve 41 to the energized state. Thereby, the valve of the hydraulic solenoid valve 41 is switched, and the discharge oil passage 51 and the first oil passage 53 communicate with each other, and the second oil passage 54 and the discharge oil passage 52 communicate with each other.

  When the discharge oil passage 51 and the first oil passage 53 communicate with each other, the pressure oil is supplied from the hydraulic pump P to the first oil passage 53, and the vibration is passed through the first oil passage 53L and the first oil passage 53R. Pressure oil is supplied to the dynamic lock cylinder 34L and the swing lock cylinder 34R. As a result, the swing lock cylinder 34L and the swing lock cylinder 34R extend, and the swing frame 30 is fixed to the sub-frame 5 and the swing is restricted. In the present embodiment, the state in which the lock solenoid SOL41a of the hydraulic solenoid valve 41 is energized and pressure oil is supplied from the hydraulic pump P to the swing lock cylinders 34L, 34R is referred to as a swing lock transition state.

  In step S3, the controller 70 has input from both the proximity switch 46L and the proximity switch 46R a detection signal indicating that the rocking lock cylinder 34 is extended and the plate 33 is in contact with the contact portion 39. Judging. When the detection signal is input from the proximity switch 46L and the proximity switch 46R, the process proceeds to step S4. When the detection signal is not input from either the proximity switch 46L or the proximity switch 46R, until the detection signal is input. The process of step S3 is repeated.

  In step S4, the controller 70 performs a process of switching the lock solenoid SOL41a of the hydraulic solenoid valve 41 to a non-energized state. Thereby, the valve of the hydraulic solenoid valve 41 is switched, the discharge oil passage 51 is shut off, and the supply of the pressure oil to the first oil passage 53 and the second oil passage 54 is stopped. At this time, the first oil passage 53, the second oil passage 54, and the discharge oil passage 52 are in communication with each other, but since no pressure oil is supplied from the hydraulic pump P, the oil from the rocking lock cylinder 34 is not supplied. While the outflow of the hydraulic oil is regulated by the pilot check valve 43, the hydraulic oil is freely present in the pipes of the first oil passage 53, the second oil passage 54, and the discharge oil passage 52. Therefore, the swing lock cylinder 34 remains extended, and the state where the swing of the swing frame 30 is restricted is maintained. In the present embodiment, the lock solenoid SOL41a and the lock release solenoid SOL41b of the hydraulic solenoid valve 41 are in a non-energized state, and no hydraulic oil is supplied or discharged in the first oil passage 53 and the second oil passage 54. This is called the rocking lock state.

  In this embodiment, in the rocking lock state, the discharge oil passage 51 is shut off, and the first oil passage 53, the second oil passage 54, and the discharge oil passage 52 are communicated. In the rocking lock state, the discharge oil passage 51, the discharge oil passage 52, the first oil passage 53, and the second oil passage 54 may be blocked.

  In this embodiment, it is determined in step S3 whether or not the rocking lock cylinder 34 is extended. However, the present invention is not limited to this. For example, a predetermined time (for example, 3) after switching to the rocking lock transition state is determined. It may be determined whether or not (second) has elapsed, and when the predetermined time has elapsed since switching to the rocking lock transition state, it may be switched to the rocking lock state in step S4.

(Oscillation frame lock release processing)
Next, with reference to FIG. 6, a swing frame lock release process for the controller 70 to perform a process of releasing the swing lock of the swing frame 30 will be described.
First, in step S <b> 11, the controller 70 determines whether or not a control signal indicating that a lock release operation for releasing the swing of the swing frame 30 has been performed from the operation unit 60 is input. If the control signal for the unlocking operation is input, the controller 70 proceeds to step S12. If the control signal for the unlocking operation is not input, the controller 70 ends the swing frame unlocking process.

  In step S <b> 12, the controller 70 executes a lock release determination process for determining whether or not the rocking lock of the rocking frame 30 can be unlocked. Specifically, whether or not a detection signal indicating that all the track traveling iron wheels 8 are projected until they contact the track R is input from the boom detection device 13, whether the boom boom is detected from the boom position detection device 24. A detection signal indicating whether the turning position of the swivel base 21 is within a predetermined range is input from the turning position detection device 25 as to whether a detection signal indicating that the telescopic position and the undulation position 22 are within the predetermined range is input. Judgment based on whether or not. Then, when all of these detection signals are input, it is determined that the rocking lock of the rocking frame 30 is to be released. When any of the detection signals is not input, it is determined that the lock is not released.

  In step S13, the controller 70 determines whether or not it is determined in step S12 that the swing lock of the swing frame 30 is to be released. If it is determined that the swing lock of the swing frame 30 is to be released, the process proceeds to step S13, and if it is determined not to release the swing lock of the swing frame 30, the swing frame 30 is End the unlocking process.

  In step S14, the controller 70 performs a process of switching the lock release solenoid SOL41b to the energized state. Thereby, the valve of the hydraulic solenoid valve 41 is switched, the discharge oil passage 51 and the second oil passage 54 communicate, and the first oil passage 53 and the discharge oil passage 52 communicate.

  By connecting the discharge oil passage 51 and the second oil passage 54, pressure oil is supplied from the hydraulic pump P to the pilot check valves 43 </ b> L and 43 </ b> R via the second oil passage 54. Thereby, the pilot check valves 43L and 43R are switched, and the outflow of pressure oil from the swing lock cylinders 34L and 34R to the first oil passages 53L and 53R is allowed. Therefore, the pressure oil in the swing lock cylinders 34L and 34R is released, the swing lock cylinders 34L and 34R can be reduced, and the swing frame 30 is not fixed to the subframe 5. In the present embodiment, a state in which the lock release solenoid SOL41b is energized and pressure oil is released from the swing lock cylinders 34L, 34R is referred to as a swing lock release state.

  As described above, when the unlocking operation is performed in the operation unit 60, when it is determined by the unlocking determination that the rocking lock of the rocking frame 30 is to be released, the rocking lock is released. On the other hand, for example, when the telescopic boom 22 is extended more than a predetermined value and the boom position detection device 24 has not detected that the telescopic position of the telescopic boom 22 is within a predetermined range, the swing frame 30 is not swung. Since it is determined not to release the movement lock, even if the lock release operation is performed in the operation unit 60, the switching to the rocking lock release state is not performed.

(Rocking frame lock emergency release processing)
Next, a swing frame lock emergency release process for releasing the swing lock of the swing frame 30 by operating the emergency switch 80 will be described with reference to FIG.
In step S21, when the emergency switch 80 is ON and the unlock solenoid SOL41b and the emergency switch 80 are conductive, the unlock solenoid SOL41b is energized in step S22. Further, when the emergency switch 80 is OFF in step S21 and the unlock solenoid SOL41b and the emergency switch 80 are shut off, in step S23, the unlock solenoid SOL41b is turned off.

  That is, the lock release solenoid SOL41b is switched to the energized state by conducting with the emergency switch 80 without inputting a control signal. Since the emergency switch 80 is a momentary switch that automatically returns to OFF when not operated, the unlocking solenoid SOL41b is switched to the energized state only when the operator is operating the emergency switch 80.

  As described above, in the present embodiment, the process of releasing the rocking lock of the rocking frame 30 includes the rocking frame unlocking process controlled by the controller 70 according to the operation of the operation unit 60, and the emergency switch 80. There are two types of swing frame lock emergency release processing using.

  When the swing frame unlocking process is performed, the controller 70 does not operate normally due to a failure or the like, or the overhang detection device 13, the boom position detection device 24, or the turning position detection device 25 has a problem, and the detection signal is output. If not outputted, the rocking lock of the rocking frame 30 cannot be released even if the operation unit 60 is operated. However, in the swing frame lock emergency release process, the emergency switch 80 is connected to the lock release solenoid SOL41b without going through the controller 70. Therefore, by operating the emergency switch 80, the lock release solenoid SOL41b is energized. You can switch to the state. Therefore, even if the controller 70 or the various detection devices described above has a problem, even if the orbital travel must be performed, the rocking lock of the swing frame 30 is surely released and the orbital travel can be performed safely. It can be carried out.

  Further, when the emergency switch 80 is turned on, the rocking lock of the rocking frame 30 is released, and the track vehicle 1 is tracked. For example, the track vehicle 1 is urgently moved to escape the track vehicle 1 from the track. In the case where it is necessary to operate the railcar 1, only the emergency switch 80 is operated, and the rail vehicle 1 can be traversed while the swing frame 30 is swingable.

  In this embodiment, the emergency switch 80 is connected to the unlocking solenoid SOL41b and the emergency track controller 90. When the emergency switch 80 is turned on, the unlocking solenoid SOL41b is energized and the emergency switch 80 is turned on. The track running controller 90 controls emergency track running. However, the emergency switch 80 may be a switch dedicated to the emergency release of the rocking lock of the rocking frame 30 by connecting only with the unlocking solenoid SOL41b. Also, the emergency switch is turned on when a predetermined condition is satisfied, for example, the emergency switch 80 can be turned on only when a detection signal from the overhang detection device 13 is input. It may be.

  In the present embodiment, the swing frame 30 corresponds to an iron wheel vertical movement mechanism, and the swing lock mechanism 32 corresponds to an iron wheel lock mechanism. The controller 70 corresponds to the switching control means, and the circuit connecting the unlock solenoid SOL41b and the emergency switch 80 corresponds to the unlock circuit. Further, the emergency switch 80 corresponds to an emergency track running operation means, and the swing lock cylinder 34 corresponds to a lock actuator.

DESCRIPTION OF SYMBOLS 1 Railroad vehicle 2 Driving cab 3 Car body 4 Chassis frame 5 Subframe 6 Road running wheel 7 Iron wheel bracket 8 Rail running iron wheel 9 Iron wheel support member 10 Overhang storage hydraulic cylinder 11 Turntable 12 Outrigger jack 13 Overhang detection device 20 Work place 21 Pivoting platform 22 Telescopic boom 23 Work platform 24 Boom position detection device 25 Swing position detection device 30 Swing frame 31 Swing shaft 32 Swing lock mechanism 33 Plate 34 Swing lock cylinder 35 Spring 36 Cylinder tube 37 Piston 38 Piston rod 39 Contact portion 40 Oscillating frame lock hydraulic circuit 41 Hydraulic solenoid valve 42 Relief valve 43 Pilot check valve 44 Pressure switch 45 Limit switch 46 Proximity switch 51 Discharge oil passage 52 Drain oil passage 53 First oil passage 54 First 2 oil passage 60 operation unit 70 controller 0 emergency switch 90 emergency track traveling controller E Engine P hydraulic pump R trajectory

Claims (2)

A track-and-rail vehicle comprising a wheel for road traveling and a steel wheel for orbital traveling, and orbiting by projecting downward a pair of steel wheels that are paired in the width direction provided on both front and rear sides of the vehicle body,
An iron wheel vertical movement mechanism capable of moving to different heights with respect to the vehicle body by allowing at least one of the left and right iron wheels in the front-rear direction to move up and down,
An iron ring locking mechanism that locks the vertical movement of the iron wheel by the iron wheel vertical movement mechanism,
Switching control means for switching the lock of the iron wheel up and down by the iron ring lock mechanism, and release of the lock;
An independent circuit separate from the switching control means, and without using the switching control means, a lock releasing circuit for releasing the lock of the vertical movement of the iron wheel by the iron wheel locking mechanism ;
Emergency track running operation means for manipulating emergency track running, and
The unlocking circuit releases the lock of the vertical movement of the iron wheel by the iron wheel lock mechanism when the emergency track running operation means is operated . The iron ring lock mechanism
A hydraulic pump that discharges hydraulic oil;
A locking actuator that locks the vertical movement of the iron wheel by hydraulic oil supplied from a hydraulic pump;
A solenoid valve for controlling the flow direction of hydraulic oil between the hydraulic pump and the actuator for locking,
The unlock circuit is
The track-and-rail vehicle according to claim 1 , wherein the lock of the vertical movement of the iron wheel by the locking actuator is released by switching the flow direction of the hydraulic oil between the hydraulic pump and the locking actuator by a solenoid valve.

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