JPH1111122A - Wheel position holding device of track traveling wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a track traveling from being performed while the operation of a wheel position holding device for tire wheel is forgotten. SOLUTION: In this device, a hook oscillating hydraulic cylinder 13 is extended when a turntable is protruded downward from a housing position for operation. A hook 12 thus rocks around a hook mounting pin 11 and reaches a position for hooking a bracket pin 10. When the turntable is perfectly protruded, a tire wheel position is fixed and held in a prescribed position of a car body. Thus, the track traveling can be prevented from being performed while the operation of the wheel position holding device of tire wheel is forgotten.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track-and-land vehicle capable of traveling on roads and tracks (railroad rails), and more particularly to a type in which tire wheels (road running wheels) are separated from rails during track running. Regarding tracked vehicles.

[0002]

2. Description of the Related Art A track-and-land vehicle is constructed on the basis of a truck, and has tire wheels at four positions in front, rear, left and right of a vehicle body. Further, iron wheels (track running wheels) are attached at four positions on the front, rear, left and right sides of the vehicle body so as to be capable of extending downward and retracting upward. The vehicle body is provided with a working device such as a high working device.

[0003] Such a track-and-land vehicle is known to be a tire-wheel drive type. When traveling on a track, an iron wheel is extended on a rail, and the tire wheel is brought into contact with a rail surface to rotate and drive the tire wheel. It is designed to run. However, when the tire air pressure is low, a part of the tire may be projected downward due to deformation of the tire. In this case, the downwardly projecting portion may exceed the vehicle limit, and may damage equipment provided near the rail during track running. For this reason, a structure has been proposed in which an iron-wheel drive system is used instead of a tire-wheel drive system, and the tire wheels run away from the rail during track running.

[0004]

Generally, since the tire wheels are attached to the vehicle body via a suspension device, in order to protrude the iron wheels and separate the tire wheels from the rails, the vehicle body must have at least a deflection amount of the suspension. It is necessary to lift by a size exceeding. However, in this case, the iron wheel support member must be made considerably long, which increases the center of gravity of the vehicle body and makes the vehicle body unstable, which is not preferable. For this reason, in iron wheel drive type rail-land vehicles,
A structure has been considered in which a tire wheel position is fixedly held with respect to a vehicle body at a position substantially at the time of contact with the ground, and then the vehicle body is pulled up.

[0005] However, if the vehicle is driven on a track while forgetting the operation of fixing and maintaining the tire wheel position, the tire wheel position may exceed the vehicle limit as described above. There is a risk of damage to the equipment installed in the vehicle. Further, there is a problem that the vehicle body becomes unstable due to an elastic reaction force due to the tire pressed against the rail, and also receives a large resistance during the track running due to the rolling resistance of the tire wheel.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and it is possible to prevent a forgetting operation of fixing and holding a tire wheel position at a stage of shifting from a road running to a track running. It is intended to prevent.

[0007]

In order to achieve the above object, a wheel position holding device according to the present invention comprises a tire wheel, an iron wheel, and a turning platform. A wheel support member that is used for a track-and-land vehicle of a type in which wheels run away from a track and that operates by turning a turning platform downward from a stowed position and simultaneously activating wheel holding means to rotatably support tire wheels. A means is provided for fixing and holding the tire wheel position in a fixed position with respect to the vehicle body.

According to such a configuration, the tire wheel position is fixed and held by the wheel holding means when the turntable is extended and the vehicle body is lifted and supported, so that the tire wheel is lifted together with the vehicle body. For this reason, the tire wheels can be lifted as they are without being affected by the deflection of the suspension device, and the overhang amount of the turntable and the overhang amount of the iron wheel may be small. Furthermore, since the fixed holding operation of the tire wheel position by the wheel position holding means is performed in conjunction with the overhang operation of the turntable,
It is possible to reliably prevent the wheel position from being forgotten for fixed holding operation.

Further, the fixed holding of the tire wheel positions once performed must not be released except for a state where the vehicle body is supported only by the tire wheels on the road. Therefore, the track-and-land vehicle further includes a turntable storage detecting means and a wheel storage detecting means in addition to the holding operation control means for controlling the holding operation of the wheel supporting member by the wheel holding means, and the turntable storage detecting means and the wheel storage detecting means. It is preferable that the holding operation control means permits release of the wheel position holding by a signal from the means.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings, taking a tracked vehicle equipped with a wheel position holding device of the present invention as an example. The track-and-land vehicle 1 provided with the wheel position holding device of the present invention is configured based on a truck as shown in FIG. 2, and has tire wheels (road running wheels) attached to four positions in front, rear, left and right of the vehicle body 2. 3 allows the vehicle to travel on the road. Further, iron wheels (track running wheels) 4 are rotatably attached to an iron wheel support member 4a which is swingably supported by the vehicle body 2 at four positions in front, rear, left and right of the vehicle body 2.

The iron wheel supporting member 4a is oscillated by the expansion and contraction operation of the iron wheel projecting and retracting hydraulic cylinder 5. By oscillating the iron wheel supporting member 4a, the iron wheel 4 is extended downward or stored upward. And so on. Further, the pitch between the left and right iron wheels 4, 4 can be changed according to the width of the rail (track) R for railway. Rail-mounted vehicle 1 mounted on rail R with all steel wheels 4 overhanging
Can drive on the rail R by driving the iron wheel 4 by an iron wheel drive hydraulic motor (not shown).

At the center of the lower part of the vehicle body 2, a turntable 6 for mounting the track-and-land vehicle 1 on the rail R and moving it is mounted. The turntable 6 can be extended downward or retracted upward by the expansion / contraction operation of the turntable extension storage hydraulic cylinder 7, and further, the vehicle body 2 is moved to the turntable 6 by a vehicle body turning hydraulic motor 8. It can be turned horizontally.

When construction or inspection of railway equipment such as a tension line and a trolley line on the rail R is performed by the rail-land vehicle 1 having such a configuration, first, the tire wheels 3 are driven to travel along the road to near the work site. Run and move. It should be noted that the iron wheel 4 and the turntable 6 are in a stowed state during such road running.

When the vehicle arrives at a railroad crossing near the work site, the vehicle stops across the rail R, and the turntable overhanging storage lever 21 mounted on the vehicle body 2 is operated to cause the turntable 6 to protrude. The body 2 is supported. Then, the vehicle body turning hydraulic motor 8 is driven to horizontally turn the vehicle body 2 with respect to the turntable 6, and the left and right iron wheels 4, 4 are positioned on the rail R. Here, when the pitch of the left and right iron wheels 4, 4 is different from the width of the rail R, the pitch of the left and right iron wheels 4, 4 is fixed according to the width of the rail R. Then, by operating the iron wheel overhanging storage lever 20 attached to the vehicle body 2, all the iron wheels 4 are extended, and the turntable 6 is retracted by operating the turntable overhanging storage lever 21 to move the iron wheel 4 to the rail. Place on R.

Next, the iron wheel 4 is driven by the hydraulic motor (not shown) for driving the iron wheel, travels on the rail R, moves to the destination, and performs work. When the work is completed, the vehicle travels again on the rail R and moves up to the railroad crossing, and the turning body 6 supports and turns the vehicle body 2. At this time, the iron wheel 4 is stored. Then, after the turntable 6 is retracted and the vehicle body is lowered on the road, the tire wheels 3 are driven to travel on the road and move to another place.

When the track-and-land vehicle 1 travels on the track only by the driving force of the iron wheel 4 as described above, it is desirable that the tire wheels 3 for road travel do not contact the rail R. Therefore, the tire wheel position is fixedly held at a predetermined position of the vehicle body 2 as shown in FIG. 2, but the wheel position holding device according to the present invention is provided in order to reliably perform the operation of fixing and holding the tire wheel position. Can be

[0017]

[Configuration of Wheel Position Holding Device] FIG. 1 shows the configuration of the wheel position holding device. A wheel support member (bearing) 17 that rotatably supports an axle 16 of the tire wheel 3 is attached to the leaf spring 1.
Bracket 9 fastened to U bolt 19 fixed to 8
, A bracket pin 10 is fixedly provided. A wheel position hook 12 is pivotally connected to a hook mounting pin 11 which is located above the bracket pin 10 and fixed to the vehicle body 2. Further, one end of a hook swinging hydraulic cylinder 13 that expands and contracts by hydraulic pressure is mounted on the vehicle body 2, and the other end is mounted in the middle of the hook 12. The hook 12 is swung about the hook mounting pin 11 by the expansion and contraction operation of the hook swing hydraulic cylinder 13. When the hook 12 is swung around the hook mounting pin 11 by the extension operation of the hook swing hydraulic cylinder 13, and the longitudinal direction of the hook 12 is substantially vertical,
The hook portion 12a of the hook 12 is located below the bracket pin 10.

When the vehicle body 2 is on a road and the turntable 6 is not overhanging, the vehicle body 2 is
When the hook 12 swings due to the extension operation of the hook swing cylinder 13 and the longitudinal direction of the hook 12 becomes substantially up and down, the bracket 8 is supported. The pin is located at the position of the solid line 10 and is separated from the hook hook 12a.

A limit switch (first limit switch) 22 for detecting the storage state of the turntable 6 is provided near the turntable 6 or the turntable storage portion of the vehicle body 2. When the cylinder 7 contracts and the turntable 6 is completely stored in the vehicle body, it is turned on, the turntable overhanging storage hydraulic cylinder 7 extends from the retracted state, and the turntable 6 is slightly extended downward. When it is off. In addition, a limit switch (second limit switch) 23 for detecting the storage state of the iron wheel 4 is provided near the iron wheel support member 4a or the vicinity of the iron wheel support member mounting portion of the vehicle body 2, so that the iron wheel overhanging storage hydraulic cylinder 5 contracts. When the iron wheel 4 is completely retracted, it turns on,
It turns off when the iron ring overhanging storage hydraulic cylinder 5 extends from the retracted state and the iron wheel 4 is slightly overhanging.

Next, a description will be given of an operation control device of the turntable overhang storage hydraulic cylinder 7 and the hook swing hydraulic cylinder 13 with reference to FIG. Here, regarding the port (connection port) of each hydraulic cylinder, the side with the rod is the second port and the opposite side is the instep port. When the hydraulic motor 28 is driven, the hydraulic oil in the oil tank 30 is sucked up by the hydraulic pump 27 through the suction filter 29 and the second control valve 2
Sent to 6. The second control valve has four ports, a port 33 communicating with the hydraulic pump 27 and a port 3 communicating with the oil tank 30.
In addition to 4, a port 35 communicating with the first control valve 25 and a port 36 communicating with the second port of all the hook swing hydraulic cylinders 13 (a pipe branches midway) are provided. Also, the first control valve 2
5 also has four ports. In addition to the port 37 communicating with the second control valve and the port 38 communicating with the oil tank 30, the instep ports of all the hydraulic cylinders 7 for overturning and retracting the hydraulic cylinders 7 and the instep ports of all the hydraulic cylinders 13 for swinging the hooks are provided. Port 39 (both pipes branch midway) and a port 40 (piping branches midway) that communicates with all the ports of the hydraulic cylinders 7 for overturning and storage. In the middle of the piping between the instep port and the port B of each hydraulic cylinder, a pilot check valve 3
2 are provided.

The first control valve 25 is a manual directional control valve, and the valve is switched by manual operation of the turntable overhang storage lever 21. The first control valve 25 is always in the neutral position 2 by the force of the spring when the turntable overhang storage lever 21 is not operated.
5b. The second control valve 26 is a solenoid-type directional control valve. When the hook swing lever 24 provided on the vehicle body 2 is manually operated under a certain condition (described later), the solenoid 26c is electromagnetically transmitted to the solenoid 26c via the hook swing controller 15. Force is applied and the valve is switched. When the hook swing lever 24 is not operated, it is always in the normal position 26a by the force of the spring.
Located in.

When neither the turntable overhang storage lever 21 nor the hook swing lever 24 is operated, the first control valve is in the neutral position 25.
b and the second control valve is in the normal position 26a. At this time, if the hydraulic pump 27 is operating, the hydraulic oil sucked from the oil tank 30 is sent from the port 37 of the second control valve 26a to the port 39, and further to the port 33 of the first control valve 25a. Since the oil is shut off, the pressure of the oil in the pipe increases, and the oil is discharged into the oil tank 30 by the relief valve 31. In this state, the turntable overhang storage hydraulic cylinder 7
Neither does the hook swing hydraulic cylinder 13 operate.

[0023]

[Operation of Wheel Position Holding Apparatus] First, the operation at the time of transition from road running to track running will be described. The vehicle body 2 is supported on the road (above the railroad crossing) only by the tire wheels 3. At this time, the turntable 6 is in the retracted state (the first limit switch 22 is on), and the iron wheel 4 is also in the retracted state (second state). The limit switches 23 are all on).

When the turntable extension storage lever 21 provided on the vehicle body 2 is manually operated to extend the turntable extension storage hydraulic cylinder 7, the turntable 6 starts to protrude downward (the first limit switch 22). Turns off). The hook swing hydraulic cylinder 13 is also extended at the same time as the turntable extension storage hydraulic cylinder 7 is extended, whereby the hook 12 is pivoted about the hook mounting pin 11 and the hook 12a of the hook 12 is bracketed. It is located below the pin 10. The operation of the hook 12 is completed before the turntable 6 comes into contact with the ground (when the unevenness of the ground is taken into consideration, the extension operation of the hook swing hydraulic cylinder 13 is started shortly after the start of extension of the turntable overhang storage hydraulic cylinder 7). Preferably completed).
At this time, the outer shape of the tire wheel 3 is at the position of the solid line 14 and the bracket pin is at the position of the solid line 10.

When the turntable 6 further protrudes and touches the ground, the vehicle body 2 starts to lift at that time. In response to the lifting movement of the vehicle body 2, the tire wheels 3 move the leaf spring (suspension device) 1 with respect to the vehicle body 2.
8, the leaf spring 18
The deflection is gradually released and the tire wheels 3
Tries to remain in place with the ground contact. However, since the hook 12a of the hook 12 is located immediately below the bracket pin 10 as shown in FIG. 1, when the turntable 6 is further extended, the deflection of the leaf spring 18 is completely released. Before the hook 12a is hooked on the bracket pin 10, the tire wheel 3 leaves the ground while being fixedly held by the hook 12 at a position slightly downward from the position of the tire outer shape 14. The outer shape of the tire wheel at this time is 2
The dotted line 14a and the bracket pin are located at the position indicated by the two-dot chain line 10a. In FIG. 1, the upward movement of the vehicle body-side structure with respect to the lifting movement of the vehicle body 2 is performed in the same manner as the tire wheel-side structure is moved downward (for convenience of illustration).
To 14a, from bracket pin 10 to 10a).

When the turntable 6 is further extended, the tire wheels 3 are lifted up together with the vehicle body 2 while keeping the positions fixed. Therefore, the overhang of the turntable 6 may be small, and the overhang of the iron wheel 4 may be small (the length of the iron wheel support member 4a may be short).

After the turntable 6 is completely extended and the vehicle body 2 is supported, the turntable 6 is turned horizontally to turn the left and right iron wheels 4, 4.
4 is located on the rail R. Here, the left and right iron wheels 4,
If the pitch of the iron wheels 4 is different from the width of the rail R, the pitch of the left and right iron wheels 4 is fixed according to the width of the rail R. Then, the iron-wheel overhang storage lever 20 provided on the vehicle body 2 is operated to extend the iron-wheel overhang storage hydraulic cylinder 5 to extend the iron wheel 4 (all the second limit switches are turned off). Then, the turntable 6 is gradually retracted to put the left and right iron wheels 4, 4 on the rail R, and then the iron wheels 4 are driven by an iron wheel driving hydraulic motor (not shown) to travel on the track.

As described above, since the fixed holding of the tire wheel position, which is essential during the track running, is performed in conjunction with the overhang operation of the turntable 6, forgetting to hold the fixed tire wheel position can be reliably prevented.

Further, by fixing and holding the tire wheel 3 in a state of being separated from the rail R, a problem caused by traveling on a track while keeping the tire wheel 3 in contact with the rail R, that is, a deformed portion of the tire wheel 3 May cause damage to equipment near the rail R when the vehicle exceeds the vehicle limit, instability of the vehicle body due to the elastic reaction force of the tire wheel 3 pressed against the rail R, or during track running due to rolling resistance of the tire wheel 3 A problem such as generation of a large resistance can be prevented.

In order to prevent the vehicle from traveling on the track with the tire wheel positions not fixedly held, the wheel positions are fixed and held by the hooks 12 at the start of the track running, and all the iron wheels 4 are extended. Otherwise, it is preferable to adopt a structure that cannot drive the iron wheel driving hydraulic motor (not shown).

The hydraulic circuit diagram (FIG. 4) shows the operation of the turning cylinder overhanging storage hydraulic cylinder 7 and the hook swing hydraulic cylinder 13 in the process of overhanging the turning stand 6 (simultaneously the wheel position holding device is operated) and retracting. explain. When the turntable 6 is extended, the turntable extension storage lever 21 is manually operated in a state where the hook swing lever 24 is not operated (the second control valve is in the normal position 26a) to set the first control valve 25a.
Switch to. As a result, the hydraulic oil pumped up by the hydraulic pump 27 passes through the port 37 from the port 37 of the second control valve 26a, flows into the port 33 of the first control valve 25a, and flows out of the port 35. The hydraulic oil further flows into the instep port of each turntable overhang storage hydraulic cylinder 7 to extend the turntable overhang storage hydraulic cylinder 7, respectively, and at the same time, flows out from the second port of the turntable overhang storage hydraulic cylinder 7. Hydraulic oil is supplied to port 3 of the first control valve 25a.
It is discharged from 6 through the port 34 to the oil tank 30. As a result, the turntable 6 protrudes.

In this process, the hydraulic oil which has flowed out of the port 36 of the first control valve 25a flows into the instep port of each of the turntable overhang storage hydraulic cylinders 7, and at the same time, the instep port of each of the hook swing hydraulic cylinders 13. The hydraulic oil that has flowed into the second control valve 26a from the port 40 of the second control valve 26a
Through the oil tank 30. As a result, the hook swing hydraulic cylinder 13 is extended, and the hook 12 swings to fix and hold the tire wheel position. In this manner, the fixed holding of the tire wheel position is performed simultaneously with the operation of extending the turntable 6 (see the flow indicated by the solid line in FIG. 3).

As described above, since the extension operation of the hook swing hydraulic cylinder 13 is completed before the turntable 6 comes into contact with the ground, when the turntable 6 is no longer extended, the turntable extension is stored. Since all the extension operations of the hydraulic cylinder 7 and the hook swing hydraulic cylinder 13 have been completed, the operation of the hook swing operation lever 24 is stopped (released).
Alternatively, a detecting means for detecting that the turntable 6 is completely extended, and a display panel for displaying the completion of the extension of the turntable 6 may be provided via the detecting means. When the hand is released from the hook swing operation lever 24, the first control valve becomes the neutral position 25b, and all the hydraulic oil sucked up by the hydraulic pump 27 is discharged from the relief valve 31 into the oil tank 30.

After turning the turntable 6, the process of retracting the turntable 6 is performed in the same manner as when the turntable 6 is extended, with the hook swing lever 24 being kept as it is (the second control valve is in the normal position 26a). The first control valve is switched to 25c by operating the chassis overhang storage lever 21. Then the hydraulic pump 27
The hydraulic oil that has been sucked up and passed through the port 37 or the port 39 of the second control valve 26a flows into the port 33 of the first control valve 25c, and flows out of the port 36. This hydraulic oil flows into the port B of the turntable overhang storage hydraulic cylinder 7, while the hydraulic oil flowing out of the instep port of the turntable overhang storage hydraulic cylinder 7 is supplied to the port 35 of the first control valve 25 c.
Through the port 34 and into the oil tank 30. As a result, the turntable overhang storage hydraulic cylinder 7 contracts,
The turntable 6 is stored. In this process, the hook swing hydraulic cylinder 13 does not operate.

Next, the operation of shifting from track running to road running will be described. Immediately after finishing the track running, the turntable 6 is completely retracted (the first limit switch is on), and the iron wheel 4 is in the extended state (all the second limit switches are off).

In this state, the turntable 6 is gradually extended and the vehicle body 2 is lifted. When the turntable 6 is completely extended, the vehicle body 2 is supported. By operating the iron wheel overhanging storage lever 20, the iron wheel overhanging and retracting hydraulic cylinder 5 is contracted to store the iron wheel 4 (all the second limit switches are turned on), and the turntable 6 is turned horizontally to turn the vehicle body 2
At the point where you drop the vehicle onto the road. When the turntable 6 is gradually stored, the tire wheels 3 come into contact with the ground. When the turntable 6 is further stored and completely stored (the first limit switch is turned on), the vehicle body 2 is supported only by the tire wheels 3.

The operation of the overturning and retracting hydraulic cylinder 7 during the overhang of the turntable 6 (the wheel position holding device does not operate) and the storing process will be described with reference to FIG. When the turntable 6 is overhanged, the same process as when shifting from road running to track running is performed. The difference is that the hook swing hydraulic cylinder 13 is already in the extended state. That is, the hydraulic oil that has passed through the first control valve 25a only extends the turntable overhanging storage hydraulic cylinder 7 and does not operate the hook swing hydraulic cylinder 13 (as the hydraulic oil is pushed out of the turntable 6 as described above). Attempts to flow into the instep port of the hook swing hydraulic cylinder 13, but the hook swing hydraulic cylinder 13 is only blocked because the hook swing hydraulic cylinder 13 is already in the extended state.) Thereafter, when the turntable 6 is retracted, the contraction process of the turntable overhang storage hydraulic cylinder 7 goes through the same process as in the transition from road running to track running.

Finally, the operation of releasing the fixed holding of the tire wheel position after this will be described. The fixed holding of the tire wheel position is released by contracting the hook swing hydraulic cylinder 13 which has been extended to fix and hold the tire wheel position. First, the hook swing lever 24 attached to the vehicle body 2 is released. It is performed by manual operation. In order to prevent the risk of accidentally releasing the fixed holding of the tire wheel position during track running, the hook swinging lever 24 has the iron wheel 4 stored therein and the turntable 6 completely stored as described above. 3 only when the vehicle body 2 is supported, that is, when the first limit switch is on and the second switches are not all on, even if the hook swinging lever 24 is operated, the hook swinging controller 15 causes the hook swinging controller 15 to swing. A signal for causing the contraction operation of the dynamic hydraulic cylinder 13 is not output (see the flow indicated by the broken line in FIG. 3).

As described above, in a state where the iron wheel 4 is stored and the turntable 6 is also completely stored and the vehicle body 2 is supported only by the tire wheels 3, the leaf spring 18 bends due to the weight of the vehicle body 2 and the hook 12 And the bracket pin 10 are separated (moved from the two-dot chain line 10a to the solid line 10) (see FIG. 2). When the hook swing lever 24 is manually operated to contract the hook swing hydraulic cylinder 13 via the hook swing controller 15, the hook 12 swings around the hook mounting pin 11 and is stored in the vehicle body 2, Release of the fixed holding of the tire wheel position is completed. Only after that, the vehicle travels on the road with the tire wheels 3.

By adopting such a structure, there is no danger that the fixed holding of the tire wheel position is released even if the hook swing lever 24 is operated by mistake during traveling on the track, and there is no fear of causing an unexpected accident.

The operation of the hook swing hydraulic cylinder 13 associated with the above-described wheel position fixing / holding release operation will be described with reference to FIG. After the iron wheel 4 is stored (the second limit switch is turned on) and the turntable 6 is also stored (the first limit switch is also turned on), the turntable overhang storage lever 21 is left as it is (the first control valve is in the neutral position 25b). Hook swing lever 2)
Operate 4 manually. Then the hook swing controller 15
Sends an electromagnetic signal to the solenoid 26c of the second control valve, the second control valve is switched to 26b, and the hydraulic pump 27
Hydraulic oil sucked up at port 3 of the second control valve 26b
7 to the port 40, the hook swing hydraulic cylinder 13
Flows into Otsu Port. On the other hand, the operating oil flowing out of the instep port of the hook swing hydraulic cylinder 13 is supplied to the first control valve 25b.
, And is discharged into the oil tank 30 through the port 34. This makes the hook swing hydraulic cylinder 1
3 contracts, swings the hook 12, and releases the fixed holding operation of the wheel position.

[0042]

As described above, according to the wheel position holding device of the present invention, the wheel position holding means operates in conjunction with the overhang operation of the turntable, so that forgetting to fix and hold the wheel position is reliably prevented. Damage to equipment near the rail during track running, which can occur if wheel positions are forgotten, instability of the vehicle body due to the elastic reaction force of the tire caused by the tire wheel being pressed against the rail, tire wheels during track running Problems such as generation of resistance due to rolling resistance can be prevented. In addition, since the fixed holding of the wheel position cannot be released unless the iron wheels are stored and the turntable is also stored, there is no danger that the fixed holding of the wheel position is released by mistake during traveling on the track.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a wheel position holding device of the present invention.

FIG. 2 is a side view showing a configuration of a rail-land vehicle provided with the wheel position holding device of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a wheel position holding device according to the present invention.

FIG. 4 is a hydraulic circuit diagram of the wheel position holding device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rail land vehicle 2 body 3 tire wheel (road running wheel) 4 iron wheel (track running wheel) 4 a iron wheel support member 6 turntable 10 bracket pin 11 hook mounting pin 12 hook 13 hook swing hydraulic cylinder 14 tire outer shape 17 wheel support Member 18 Leaf spring 19 U bolt R rail

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsutomu Takeda 41-1 Higashimine Sugawa, Aiji Corp. 414-1 Aichi Corporation Shinji Works

Claims (2)

[Claims] 1. A road traveling wheel, a track traveling wheel,
A turntable that projects downward from a storage position stored in the vehicle body, lifts and supports the vehicle body, and allows the vehicle body to turn horizontally in this state; It travels using traveling wheels, and at the time of traveling on a track, a wheel position holding device of a track-and-land vehicle configured to protrude the track traveling wheels on the track and travel with the road traveling wheels away from the track. A wheel supporting member for rotatably supporting the road running wheel, a wheel holding means capable of fixing and holding the wheel supporting member at a predetermined position with respect to the vehicle body; A wheel position holding device for a railroad vehicle, wherein the wheel holding means is operated to fix and hold the wheel support member at the predetermined position. 2. A holding operation control means for controlling a holding operation of the wheel supporting member by the wheel holding means; a wheel storage detecting means for detecting a storage state of the track running wheels; and a storage state of the turntable. A turntable storage detecting means for detecting, by a signal from the turntable storage detecting means and the wheel storage detecting means, the holding operation control means permits release of the wheel position holding by the wheel support member. The wheel position holding device for a rail-land vehicle according to claim 1, wherein