Turntable for rail-road vehicles
The turntable for rail-road vehicles automates the direction change process by using sensors and control systems to detect obstacles and align wheels, reducing worker burden and enhancing safety during track loading and unloading operations.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KABUSHIKI KAISHA AICHI CORPORATION
- Filing Date
- 2022-09-02
- Publication Date
- 2026-07-22
AI Technical Summary
Changing the direction of a train car during track loading or unloading operations is strenuous for workers, requiring constant monitoring for obstacles and wheel alignment, which can be burdensome and unsafe.
A turntable for rail-road vehicles equipped with a vertically extendable jack, a rotating plate support member, and a grounding rotating plate, along with sensors and control systems to detect obstacles and wheel alignment, automating the direction change process.
The system reduces worker burden and enhances safety by automating the direction change, preventing collisions with obstacles and ensuring proper wheel alignment during track loading and unloading.
Smart Images
Figure 0007893690000001 
Figure 0007893690000002 
Figure 0007893690000003
Abstract
Description
Technical Field
[0001] The present invention relates to a vehicle turning device for a land-rail vehicle for performing a direction change of the land-rail vehicle capable of traveling on a road and a track.
Background Art
[0002] The land-rail vehicle is configured to be able to travel on a road by road-running wheels (hereinafter also referred to as tire wheels), and rail-running wheels (hereinafter also referred to as iron wheels) that can be respectively projected / retracted are provided on the front, rear, left, and right of a vehicle body configured to be freely travelable on the road. In a state where the rail-running wheels are projected, it has a rail-running device capable of traveling on a railway track (rail), and is widely used when performing construction and inspection of railway facilities such as trolley lines on the track. Also, the land-rail vehicle usually includes a turning device for performing a direction change of the vehicle body when loading the vehicle body from a road (for example, a level crossing) onto the track or unloading the vehicle body from the track onto the road (for example, a level crossing). Here, loading the vehicle body onto the track is referred to as "lining up", and unloading the vehicle body from the track is referred to as "leaving the line".
[0003] The turning device, also called a turntable, includes a turning jack provided on the vehicle body of the land-rail vehicle and capable of expanding and contracting in the vertical direction downward, a rotating plate support member provided at the lower end of the turning jack, and a grounding rotating plate provided rotatably around a vertical axis at the lower part of the rotating plate support member. And in the turning device, the turning jack is extended downward to ground the grounding rotating plate to lift the vehicle body from the ground, and the vehicle body is rotated by rotating the support member and the turning jack with respect to the grounding rotating plate. board By rotating the support member and the turning jack, it is possible to perform a direction change of the vehicle body.
[0004] When loading or unloading a rail-road vehicle, for example, at a level crossing, the turntable jack is extended downwards to lower the grounding plate, lifting the vehicle off the ground and supporting it so that it can rotate horizontally. From this state, when loading the vehicle, the operator pushes the vehicle to rotate it in the direction of the track laying, extends the steel wheels, and then retracts the turntable jack to place the vehicle on the track. When unloading the vehicle, the operator pushes the vehicle to rotate it in the direction of the road, retracts the steel wheels, and then retracts the turntable jack to lower the vehicle from the track onto the road (level crossing) (see, for example, Patent Document 1 below). [Prior art documents] [Patent Documents]
[0005] [Patent Document 1] Patent No. 5635817 [Overview of the Initiative] [Problems that the invention aims to solve]
[0006] When changing the direction of a train car during track loading or unloading operations, workers must pay attention to various points while performing the work. For example, when changing the direction of the train car, it is necessary to constantly monitor whether there are any obstacles in the direction of rotation, and if there are any obstacles, the obstacles must be removed or the direction change interrupted. Also, when loading the train car, it is necessary to visually check whether the protruding steel wheels are positioned on the track while pushing and rotating the train car, and to stop changing the direction of the train car when the positions of both coincide. Furthermore, the direction change of the train car is performed by the workers' own strength, and rotating (turning) the heavy train car is strenuous for the workers. Thus, changing the direction of a train car during track loading and unloading operations is a significant burden on the workers.
[0007] This invention has been made in view of the above problems, and is a turntable for rail-road vehicles that can assist in turning the vehicle body during track loading and unloading operations, thereby reducing the burden on workers. The purpose is to provide a place. [Means for solving the problem]
[0008] To solve the above problems, the turntable for a rail-road vehicle according to the present invention comprises: a turntable jack provided on the body of a rail-road vehicle capable of traveling on roads and rails, having road-traveling wheels (for example, a pair of left and right steering wheels 3S and a pair of left and right drive wheels 3D in the embodiment) and rail-traveling wheels (for example, a pair of left and right front iron wheels 12F and a pair of left and right rear iron wheels 12R in the embodiment), which is extendable vertically downward toward the body of the vehicle; a rotating plate support member provided at the lower end of the turntable jack (for example, an upper plate 131 constituting the rotating support table 130 in the embodiment); and a grounding rotating plate (for example, a lower plate 135 constituting the rotating support table 130 in the embodiment) provided at the lower part of the rotating plate support member so as to be rotatable around a vertical axis, wherein the turntable jack is extended downward to ground the grounding rotating plate and lift the vehicle body off the ground, and the turning is performed relative to the grounding rotating plate. board A turntable for a rail-road vehicle that enables the vehicle body to be turned by rotating the support member and the turntable jack, wherein, with the grounding rotating plate in contact with the ground and the vehicle body lifted off the ground, the rotation of the grounding rotating plate is controlled. board A rotary drive device (for example, a rotary drive motor 132 in the embodiment) capable of rotating a support member to change the direction of the vehicle body, a track position detector (for example, rail detectors 86, 87, 88, 89 in the embodiment) capable of detecting whether the positions of the track-running wheels and the track coincide when the vehicle body is being turned by the rotary drive device, and when the track position detector detects that the positions of the track-running wheels and the track coincide when the vehicle body is being turned by the rotary drive device, the rotary drive device rotates board The system is configured to include a rotational operation control device (for example, a control unit CU in the embodiment) that restricts the rotational operation of the support member.
[0009] In the rail-road vehicle turntable with the above configuration, an obstacle detector is provided to detect obstacles in the direction of rotational movement of the vehicle body which is turned by the rotational drive device, and when the obstacle detector detects that there is an obstacle in the direction of rotational movement of the vehicle body, the rotational operation control device controls the rotation of the rotational drive device board It is preferable to configure the support member to restrict rotational movement.
[0010] In the rail-road vehicle turntable with the above configuration, a vehicle body tilt angle detector is provided to detect the tilt angle of the vehicle body which is turned by the rotary drive device, and when the tilt angle of the vehicle body detected by the vehicle body tilt angle detector deviates from a predetermined threshold, the rotation operation control device controls the rotation of the rotary drive device board It is preferable to configure the support member to restrict rotational movement.
[0011] In the rail-road vehicle turntable with the above configuration, the turntable jack has two telescopic post sections (for example, the left telescopic post 121L and the right telescopic post 121R in the embodiment) that are spaced apart from each other and can extend and retract independently in the vertical direction, and is configured to extend and retract in the vertical direction by the extension and retraction of the two telescopic post sections, and the rotating plate support member is attached so as to connect the lower ends of the two telescopic post sections, and preferably comprises a rotation angle detector capable of detecting the rotation angle position of the rotating plate support member with respect to the grounding rotating plate, and a vehicle body tilt angle correction control device (for example, the control unit CU in the embodiment) that corrects the tilt angle of the vehicle body by adjusting the extension amount of the two telescopic post sections based on the rotation angle position of the rotating plate support member detected by the rotation angle detector when the tilt angle of the vehicle body detected by the vehicle body tilt angle detector deviates from the threshold, thereby correcting the tilt angle of the vehicle body. [Effects of the Invention]
[0012] According to the turntable for rail-road vehicles of the present invention, with the grounding rotating plate in contact with the ground and the vehicle body lifted off the ground, the rotational drive device rotates the grounding rotating plate. boardThe support members are rotated to change the direction of the vehicle body, and while the vehicle body is being turned, the track position detector detects that the position of the track-running wheels matches that of the track, and the rotation operation control device then rotates the rotation drive device. board By restricting the rotational movement of the support members, it becomes easier to change the direction of the vehicle body when placing it on the track and to align the track-running wheels with the track, thereby reducing the burden on workers.
[0013] Furthermore, the rail-road vehicle turntable with the above configuration is equipped with an obstacle detector that detects obstacles in the direction of rotation of the vehicle body which is turned by the rotary drive device, and when the obstacle detector detects that there is an obstacle in the direction of rotation of the vehicle body, the rotation operation control device turns the rotary drive device board By configuring the system to restrict the rotational movement of the support member, it becomes possible to prevent the vehicle body from coming into contact with obstacles, thereby enhancing safety.
[0014] Furthermore, in the rail-road vehicle turntable with the above configuration, a vehicle body tilt angle detector is provided to detect the tilt angle of the vehicle body being turned by the rotary drive device, and when the tilt angle of the vehicle body detected by the vehicle body tilt angle detector deviates from a predetermined threshold, the rotation operation control device controls the rotation of the rotary drive device board By configuring the system to restrict the rotational movement of the support members, it becomes possible to prevent the vehicle from changing direction while it is excessively tilted, thereby enhancing safety.
[0015] In this case, the jack for vehicle turning has two telescopic post parts that are arranged side by side with a gap between them and can be independently telescoped in the vertical direction. It is configured to be telescoped in the vertical direction by the telescoping of the two telescopic post parts. The rotary plate support member is attached so as to connect the lower end parts of the two telescopic post parts. A rotary angle detector capable of detecting the rotary angle position of the rotary plate support member with respect to the grounding rotary plate, and when the inclination angle of the vehicle body detected by the vehicle body inclination angle detector deviates from the threshold value, based on the rotary angle position of the rotary plate support member detected by the rotary angle detector, it preferably includes a vehicle body inclination angle correction control device that adjusts the extension amount of each of the two telescopic post parts to correct the inclination angle of the vehicle body. By configuring it in this way, it becomes possible to continuously change the direction of the vehicle body while correcting the inclination angle of the vehicle body.
Brief Description of Drawings
[0016] [Figure 1] It is a side view showing the appearance of a rail-land working vehicle provided with a vehicle turning device according to the present invention. [Figure 2] It is a perspective view from the rear of the vehicle body showing the schematic configuration of the above-mentioned vehicle turning device for rail-land vehicles. [Figure 3] It is a front view from the rear of the vehicle body showing the schematic configuration of the lower part of the above-mentioned vehicle turning device for rail-land vehicles. [Figure 4] It is a plan view showing one aspect of the rotary angle position of the lower plate with respect to the upper plate in the rotary support table of the above-mentioned vehicle turning device for rail-land vehicles. [Figure 5] It is a plan view showing another aspect of the rotary angle position of the lower plate with respect to the upper plate in the above-mentioned rotary support table. [Figure 6] It is a schematic view showing the positional relationship between the rotation center position of the lower plate, the iron wheel, and various detectors in the above-mentioned rotary support table. [Figure 7] It is a block diagram showing the control configuration of the above-mentioned vehicle turning device for rail-land vehicles. [Figure 8] It is a schematic view showing the first stage of the procedure for the wire laying operation of the above-mentioned rail-land working vehicle. [Figure 9] It is a schematic view showing the second stage of the procedure for the wire laying operation of the above-mentioned rail-land working vehicle. [Figure 10]This is a schematic diagram showing the third stage of the track installation procedure for the rail-road work vehicle described above. [Figure 11] This is a schematic diagram showing the fourth stage of the track installation procedure for the rail-road work vehicle described above. [Figure 12] This flowchart shows the flow of operation control when the vehicle body rotates using the above-mentioned turntable for rail-road vehicles. [Modes for carrying out the invention]
[0017] Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a side view of a rail-road work vehicle 1 equipped with a rail-road vehicle turntable according to the present invention. In Figure 1, the rail-road work vehicle 1 has a body 2 with a driver's cabin 4 at the front, and is based on a truck vehicle that can travel on roads with road-traveling wheels consisting of a pair of left and right tire wheels, which are steering wheels 3S, arranged at the front of the body 2, and a pair of left and right tire wheels, which are drive wheels 3D, arranged at the rear of the body 2. The body 2 has a body frame consisting of a chassis frame 5 and a subframe 6 mounted on the chassis frame 5. Here, although only the left steering wheel 3S and drive wheel 3D of the body 2 are shown in Figure 1, the same steering wheel 3S and drive wheel 3D are also provided on the right side of the body 2.
[0018] Work jacks 15 are provided behind the steering wheels 3S and behind the drive wheels 3D on the vehicle body 2. The work jacks 15 consist of an upper jack body 15a fixed to the vehicle body frame, a lower jack body 15b that is movable downward within the upper jack body 15a, and a jack cylinder 16 connected to the upper jack body 15a and the lower jack body 15b. When this jack cylinder 16 is driven to extend and retract, the lower jack body 15b extends and retracts downward relative to the upper jack body 15a. The work jacks 15 are mainly used when the rail-road work vehicle 1 is performing work. When the jack cylinder 16 is driven to extend and retract, the lower jack body 15b extends and retracts downward, lifting and supporting the vehicle body 2, thereby stably supporting the entire vehicle body 2. On the rear side of the work jack 15 behind the steering wheel 3S, there is a front iron wheel 12F supported so as to be able to swing up and down relative to the vehicle frame, and a front iron wheel swing cylinder 13F for swinging the front iron wheel 12F up and down between a stowed position (shown by a dashed line in the figure) and an extended position (shown by a solid line in the figure). Also, on the rear side of the work jack 15 behind the drive wheel 3D, there is a rear iron wheel 12R supported so as to be able to swing up and down relative to the vehicle frame, and a rear iron wheel swing cylinder 13R for swinging the rear iron wheel 12R up and down between a stowed position (shown by a dashed line in the figure) and an extended position (shown by a solid line in the figure).
[0019] Here, the storage position described above refers to the position in which the front iron wheel 12F and rear iron wheel 12R are raised to a predetermined height above the road surface when the rail-road work vehicle 1 travels on a road or the like using the steering wheel 3S and drive wheel 3D (the position of the front iron wheel 12F and rear iron wheel 12R shown by the dashed line in Figure 1). The extended position described above refers to the position in which the front iron wheel 12F and rear iron wheel 12R are extended to a position in which the front iron wheel 12F and rear iron wheel 12R are located on the track, the steering wheel 3S and drive wheel 3D are located above the track 50, and the vehicle can travel on the track 50 using the front iron wheel 12F and rear iron wheel 12R.
[0020] Although Figure 1 only shows the front iron wheel 12F and rear iron wheel 12R on the left side of the vehicle body 2, the same front iron wheel 12F and rear iron wheel 12R are also provided on the right side of the vehicle body 2. Furthermore, although only the work jack 15, front iron wheel oscillating cylinder 13F, and rear iron wheel oscillating cylinder 13R provided on the left side of the vehicle body 2 are shown, the same work jack 15, front iron wheel oscillating cylinder 13F, and rear iron wheel oscillating cylinder 13R are also provided on the right side of the vehicle body 2.
[0021] A turntable 110 is provided at the lower center of the vehicle body 2. The turntable 110 consists of a turntable jack 120 provided at the lower part of the vehicle body 2 and capable of extending downwards, and a rotating support table 130 provided at the lower end of the turntable jack 120. The turntable jack 120 has two telescopic posts (left telescopic post 121L and right telescopic post 121R) that are offset from each other in the front-rear direction and spaced apart from each other in the left-right direction (vehicle width direction). The left telescopic post 121L is configured to extend downwards in the vertical direction by the extension and retraction drive of a turntable extension cylinder 122L provided inside it. Similarly, the right telescopic post 121R is configured to extend downwards in the vertical direction by the extension and retraction drive of a turntable extension cylinder 122R provided inside it. The extension and retraction range of L and the extension and retraction range of the right extension post 121R can be adjusted to be the same as or different from each other. The turntable jack 120 is configured to extend and retract downwards in the vertical direction by the extension and retraction of the two extension posts 121L and 121R.
[0022] The rotating support table 130 is configured with an upper plate 131 horizontally provided at the lower end of the turntable jack 120 so as to connect the lower ends of two telescopic posts 121L and 121R, and a lower plate 135 horizontally provided below the upper plate 131 so as to be rotatable around a vertical axis. The turntable 110 makes it possible to change the direction of the vehicle body 2 by extending the turntable jack 120 downward to bring the lower plate 135 of the rotating support table 130 to the ground and lifting the vehicle body 2 off the ground, and by rotating the upper plate 131 and the turntable jack 120 relative to the lower plate 135. The turntable device 110 will be described in detail later.
[0023] An operating box 70 is provided at the left end of the subframe 6 in the middle of the vehicle body's longitudinal direction. This operating box 70 has operating devices for controlling the operation of the turntable 110 described above, and its details will be described later.
[0024] At the front of the mounting area (front of the subframe 6) behind the driver's cabin 4, there is a slewing platform 20 that is driven by a slewing motor 21 and is configured to rotate horizontally. A boom 30 is attached to a support column 22 extending upward from this slewing platform 20, with a foot pin 23 as the axis, so as to be able to swing (luff) up and down. The boom 30 is composed of a base boom 30a, an intermediate boom 30b, and a tip boom 30c, which are nested together and attached to the support column 22 by the foot pin 23 so as to be able to luff. A boom telescopic cylinder 31 is provided inside the boom 30, and the boom 30 can be extended and retracted in the longitudinal direction by the extension and retraction drive of this boom telescopic cylinder 31. A boom luffing cylinder 32 is mounted between the base boom 30a and the support column 22, and the boom 30 can be luffed in the vertical plane by the extension and retraction drive of this boom luffing cylinder 32.
[0025] A work platform support bracket 35 is attached to the tip of the boom 30c so as to be able to swing within the luffing surface of the boom 30. The work platform support bracket 35 is configured so that its upper surface is always kept horizontal regardless of the luffing angle of the boom 30, by the extension and retraction drive of a leveling cylinder 36 provided inside. The extension and retraction operation of the leveling cylinder 36 is controlled according to the detection value of an inclination angle sensor (not shown) that detects the inclination angle of the work platform 40. The work platform 40 is mounted on the upper surface of this work platform support bracket 35 so as to be able to rotate horizontally. A swivel motor 41 is provided inside the work platform support bracket 35, and by driving this swivel motor 41, the work platform 40 can be rotated horizontally (swivel operation) relative to the work platform support bracket 35. As described above, the upper surface of the work platform support bracket 35 is always kept horizontal, so that the floor surface of the work platform 40 is also kept horizontal regardless of the luffing angle of the boom 30. The work platform 40 is equipped with a work platform operation box 42 which has an operating device for controlling the drive of various hydraulic actuators such as a slewing motor 21, a boom extension cylinder 31, a boom luffing cylinder 32, and a swivel motor 41.
[0026] The rail-road work vehicle 1 configured as described above can retract its front iron wheels 12F and rear iron wheels 12R, and travel on roads and other surfaces using its steering wheels 3S and drive wheels 3D. It can also extend its front iron wheels 12F and rear iron wheels 12R onto the track and travel on the track. Thus, it is equipped with the aforementioned turntable 110 to switch between road travel and track travel.
[0027] As mentioned above, the turntable 110, as shown in Figure 2, has a left telescopic post 121L and The turntable jack 120 is composed of a right telescopic post 121R and a rotating support table 130 provided at the lower end of the turntable jack 120. The rotating support table 130 is composed of an upper plate 131 provided horizontally at the lower end of the turntable jack 120 so as to connect the lower ends of the left telescopic post 121L and the right telescopic post 121R, and a lower plate 135 provided horizontally and rotatably around a rotational axis O that extends vertically below the upper plate 131 via a turntable bearing 134. The outer ring of the turntable bearing 134 is fixed to the upper surface of the lower plate 135, and a large-diameter rotating gear 136 is fixed to this outer ring. A rotary drive motor 132 is provided on the side of the upper plate 131, and a pinion gear 133 is attached to a drive shaft that protrudes downward from this rotary drive motor 132. This pinion gear 133 meshes with the rotary gear 136. Therefore, when the rotary drive motor 132 rotates the pinion gear 133, it transmits rotational driving force to the rotary gear 136 that meshes with it, causing the lower plate 135, to which the rotary gear 136 is attached, to rotate relative to the upper plate 131.
[0028] The left telescopic post 121L and the right telescopic post 121R have similar configurations, and here we will explain using the left telescopic post 121L as an example. The left telescopic post 121L is composed of an outer post 123 fixed to the vehicle frame, an inner post 124 arranged to move up and down within the outer post 123, a turntable telescopic cylinder 122L (see Figure 3) located within the left telescopic post 121L, and a base plate 125 fixed to the upper surface of the upper plate 131 of the rotating support table 130. The lower end of the turntable telescopic cylinder 122L is pin-connected to the base plate 125, and the inner post 124 is connected to the base plate 125 via this pin connection so that it can swing slightly. As a result, the rotating support table 130 is configured to tilt slightly relative to the left telescopic post 121L. The configuration of the right telescopic post 121R and the relationship between the right telescopic post 121R and the rotating support table 130 are the same as described above, so we will omit the explanation.
[0029] As described above, in the rotating support table 130, the lower plate 135 is rotatable around the rotation center axis O relative to the upper plate 131. Specifically, as shown in Figure 4, the lower plate 135 can be rotated 360° around the rotation center axis O to any rotation angle position, with the rotation angle position where its short side extends in the front-rear direction (the direction of the front-rear axis A1 extending front-rear through the rotation center axis O) and its long side extends in the left-right direction (the direction of the left-right axis A2 extending in the vehicle width direction through the rotation center axis O) being used as the reference rotation angle position. The lower plate 135 has a shape that is 180° rotationally symmetric in a plan view. When the lower plate 135, which is in the reference rotation angle position, is rotated 90° clockwise or counterclockwise around the rotation center axis O, the lower plate 135 moves to a rotation angle position (also called the "right-angle rotation angle position") in which its longitudinal direction extends in the front-to-back direction (direction of the front-to-back axis A1) and its short direction extends in the left-to-right direction (direction of the left-to-right axis A2), as shown in Figure 5.
[0030] In the turntable 110, the turntable jack 120 can be extended downward to bring the lower plate 135 of the rotating support table 130 into contact with the ground, thereby lifting and supporting the vehicle body 2. In this lifted and supported state, the vehicle body 2 can be turned around by rotating the upper plate 131 and the turntable jack 120 relative to the lower plate 135, allowing for track loading and unloading operations. This turnaround is performed by rotating the upper plate 131, the turntable jack 120, and the connected vehicle body 2 relative to the lower plate 135 using the rotary drive motor 132, while the vehicle body 2 is lifted and supported by the turntable 110. Thus, the rotary drive motor 132 is capable of outputting a large rotational driving force that is sufficient to rotate the vehicle body 2 that is lifted and supported by the turntable 110.
[0031] The turntable 110 is located at the lower center of the vehicle body 2, but the vertically extending rotation axis O, which serves as the rotation center of the lower plate 135 relative to the upper plate 131, is located at the center of gravity of the rail-road work vehicle 1. Furthermore, the left and right pair of front iron wheels 12F, 12F are positioned symmetrically in the width direction of the vehicle body, and the left and right pair of rear iron wheels 12R, 12R are also positioned symmetrically in the width direction of the vehicle body. That is, as shown in Figure 6, with respect to the front and rear axis A1 that extends forward and backward through the rotational axis O, the left and right pair of front iron wheels 12F, 12F and the left and right pair of rear iron wheels 12R, 12R are positioned symmetrically on the left and right. In addition, the front iron wheel axis A3 connecting the left and right pair of front iron wheels 12F, 12F and the rear iron wheel axis A4 connecting the left and right pair of rear iron wheels 12R, 12R are parallel to the left and right axis A2 that extends in the width direction through the rotational axis O. Note that in Figure 6, the rail-road work vehicle 1 is shown in a simplified external shape, and only the components necessary for explanation are schematically illustrated so that their positional relationships can be seen. For example, for the turntable 110, only the lower plate 135 is shown, and the shape of the lower plate 135 is also simplified and shown as a rectangle.
[0032] As shown in Figure 6, the rail-road work vehicle 1 (vehicle body 2) is equipped with four obstacle detectors 81, 82, 83, and 84, four rail detectors 86, 87, 88, and 89, a vehicle body tilt angle detector 91, and a turntable rotation angle detector 93. The obstacle detectors 81, 82, 83, and 84 are detectors that detect whether or not there is an obstacle in the direction of rotational movement when the vehicle body 2, which is lifted and supported by the turntable device 110, is changed direction. For example, they output a detection signal whose output value changes depending on the presence or absence of an obstacle and the distance to the obstacle. The obstacle detectors 81, 82, 83, and 84 are provided on the front left side, front right side, rear left side, and rear right side of the vehicle body 2, respectively.
[0033] Rail detectors 86, 87, 88, and 89 are detectors that detect whether the position of the iron wheels of the vehicle body 2 being turned during track installation work matches the position of the track (whether the iron wheels are directly above the track), and they output a detection signal whose output value changes depending on the distance to the track, for example. Rail detectors 86, 87, 88, and 89 are installed near the left front iron wheel 12F, near the right front iron wheel 12F, near the left rear iron wheel 12R, and near the right rear iron wheel 12R, respectively.
[0034] The vehicle body tilt angle detector 91 is a detector that detects the tilt of the vehicle body 2, and outputs a detection signal whose output value changes according to the tilt angle of the vehicle body 2. The vehicle body tilt angle detector 91 is located in the center of the vehicle body 2. The turntable rotation angle detector 93 is a detector that detects the rotation angle of the upper plate 131 and the vehicle body 2 relative to the lower plate 135 of the rotation support table 130 when the vehicle body 2 is lifted and supported by the turntable device 110 to change direction, and outputs a detection signal whose output value changes according to the rotation angle. The turntable rotation angle detector 93 is located on the rotation support table 130.
[0035] In the turntable 110, as described above, the turntable jack 120 is extended downward to extend the rotating support table 130 downward to support the vehicle body and perform track loading and unloading operations. However, when traveling on the road or track, the turntable jack 120 is retracted upward to move the rotating support table 130 upward for storage and retention. When extending the rotating support table 130 downward or moving the rotating support table 130 upward for storage and retention, the lower plate 135 of the rotating support table 130 is rotated around the rotation center axis O, and the lower plate 135 is rotated to a predetermined rotation angle position. For example, when performing track loading and unloading operations, the lower plate 135 is rotated to a rotation angle position where the longitudinal direction of the lower plate 135 is perpendicular to the direction in which the track extends, and the short direction is parallel to the direction in which the track extends. Furthermore, when storing and holding the rotary support table 130, the lower plate 135 is rotated and held to a reference rotation angle position where the longitudinal direction of the lower plate 135 extends in the left-right direction (direction of the left-right axis A2) and the short direction extends in the front-back direction (direction of the front-back axis A1).
[0036] Next, the operation control of the extension and retraction of the turntable jack 120 and the rotation of the rotary support table 130 in the turntable device 110 will be explained with additional reference to Figure 7. The construction box 70 is equipped with a turntable rotation control device 71 and a turntable lifting control device 72. These control devices are equipped with operating tools such as operating levers and operating dials, and when these tools are operated, they output an operation signal to the control unit CU according to the direction and amount of operation. The control unit CU controls the drive of the rotary drive motor 132 in accordance with the operation signal output from the turntable rotation control device 71 to control the rotation operation of the rotary support table 130. In addition, the control unit CU controls the drive of the turntable telescopic cylinders 122L and 122R in accordance with the operation signal output from the turntable lifting control device 72 to control the extension and retraction operation of the turntable jacks 120.
[0037] The turntable extension cylinders 122L and 122R are hydraulically driven, and electromagnetic proportional control valves corresponding to the turntable extension cylinders 122L and 122R are installed in the hydraulic valve unit VU. The hydraulic valve unit VU is supplied with hydraulic fluid from the hydraulic fluid tank T by a hydraulic pump P, which is driven by the driving force transmitted from the engine E for vehicle propulsion via the power take-off mechanism PTO. The control unit CU controls the drive of the turntable extension cylinders 122L and 122R by controlling the drive of the electromagnetic proportional control valves corresponding to the turntable extension cylinders 122L and 122R.
[0038] Furthermore, the control unit CU receives detection signals from obstacle detectors 81, 82, 83, 84, rail detectors 86, 87, 88, 89, vehicle tilt angle detector 91, and turntable rotation angle detector 93 as the vehicle body 2 is turned during track loading and unloading operations. Based on the detection signals from obstacle detectors 81, 82, 83, 84, the control unit CU determines the presence or absence of an obstacle, and if an obstacle is detected, it restricts the driving of the rotary drive motor 132. In other words, at this time, even if an operation signal is output from the turntable rotation operation device 71, the control unit CU does not respond to it and restricts the driving of the rotary drive motor 132 to stop the rotation of the vehicle body 2. This prevents the vehicle body 2 from coming into contact with an obstacle. If the detected obstacle is removed, the control unit CU determines that there is no obstacle and allows the rotation of the vehicle body 2 to continue.
[0039] Furthermore, the control unit CU determines, based on detection signals from rail detectors 86, 87, 88, and 89, whether the position of the wheels of the vehicle body 2, which is being turned during track installation, matches the position of the track. If it determines that they match, it restricts the driving of the rotary drive motor 132. In other words, at this time, even if an operation signal is output from the turntable rotation operation device 71, the control unit CU does not respond to it and restricts the driving of the rotary drive motor 132 to stop the rotation of the vehicle body 2. This allows the vehicle body 2 to be stopped while the position of the wheels of the vehicle body 2 matches the position of the track.
[0040] Furthermore, the control unit CU constantly checks the tilt angle of the vehicle body 2 based on the detection signal from the vehicle body tilt angle detector 91. When the tilt angle of the vehicle body 2 deviates from a predetermined threshold, it restricts the drive of the rotary drive motor 132 to stop the rotation of the vehicle body 2. Then, it determines the rotation angle of the vehicle body 2 based on the detection signal from the turntable rotation angle detector 93 and corrects the tilt of the vehicle body 2 according to that rotation angle. Specifically, it adjusts the operating amounts of the turntable telescopic cylinders 122L and 122R to adjust the extension operating amounts of the left telescopic post 121L and the right telescopic post 121R, thereby correcting the tilt of the vehicle body 2. If the tilt angle of the vehicle body 2 falls below the threshold due to this tilt correction, it allows the rotation of the vehicle body 2. This prevents the vehicle body 2 from becoming unstable due to excessive tilting during rotation.
[0041] Next, the operation of switching between road travel and track travel using the turntable 110 (track loading and track unloading operations) will be explained with additional reference to Figures 8 to 11. In these figures, the rail-road work vehicle 1 is shown in a simplified form, and only the components necessary for the explanation are schematically shown so that their positional relationships are clear. For the turntable 110, only the lower plate 135 is shown. The shape of the lower plate 135 is also simplified and shown as a rectangle.
[0042] When performing track installation work, first, as shown in Figure 8, the rail-road work vehicle 1 is brought into the level crossing and stopped. At this time, it is necessary to move the rail-road work vehicle 1 so that the rotation center axis O of the lower plate 135 in the turntable 110 is located in the center of the rails R,R. This is because, as mentioned above, the left and right pairs of front iron wheels 12F, 12F and the left and right pairs of rear iron wheels 12R, 12R are positioned symmetrically with respect to the front and rear axis A1 that extends forward and backward through the rotation center axis O (see Figure 6). Figure 8 shows the state in which the rotation center axis O of the lower plate 135 is located in the center of the rails R,R. At this time, the lower plate 135 is stored and held at a reference rotation angle position in which its longitudinal direction extends in the left-right direction (direction of the left-right axis A2) and its short direction extends in the front-rear direction (direction of the front-rear axis A1).
[0043] Therefore, the worker performing the track installation work operates the turntable rotation operation device 71 in the operation box 70 to drive the rotation drive motor 132 and rotates the lower plate 135 to a rotation angle position where the longitudinal direction of the lower plate 135 is perpendicular to the direction in which the rails R,R extend. Next, the worker operates the turntable lifting operation device 72 in the operation box 70 to extend the turntable jack 120 downward and move the rotation support table 130 downward, bringing the lower plate 135 to the ground and lifting and supporting the vehicle body 2 with the turntable device 110.
[0044] Next, the operator operates the turntable rotation control device 71 to drive the rotary drive motor 132, rotating the vehicle body 2, which is lifted and supported by the turntable device 110. While the vehicle body 2 is rotating due to the rotary drive motor 132, the control unit CU determines whether there are any obstacles in the direction of rotation of the vehicle body 2 based on detection signals from obstacle detectors 81, 82, 83, and 84. When rotating the vehicle body 2 to the right, the control unit CU may determine the presence or absence of obstacles based on detection signals from obstacle detectors 82 and 83, and when rotating the vehicle body 2 to the left, it may determine the presence or absence of obstacles based on detection signals from obstacle detectors 81 and 84. If there is an obstacle, the control unit CU restricts the rotation of the vehicle body 2 by the rotary drive motor 132 and stops the vehicle body 2. On the other hand, if there is no obstacle or if it is removed, the rotation of the vehicle body 2 by the rotary drive motor 132 continues.
[0045] Furthermore, while the vehicle body 2 is rotating due to the rotary drive motor 132, the control unit CU determines, based on detection signals from rail detectors 86, 87, 88, and 89, whether the positions of the left and right pair of front iron wheels 12F, 12F and the left and right pair of rear iron wheels 12R, 12R of the vehicle body 2 being changed direction match the positions of the rails R, R. When they match, the control unit CU restricts the driving of the rotary drive motor 132 and stops the vehicle body 2. This makes it possible to position the left and right pair of front iron wheels 12F, 12F and the left and right pair of rear iron wheels 12R, 12R directly above the rails R, R.
[0046] Next, the operator performing the track-laying work extends the steel wheels and then operates the turntable lifting device 72 to retract the turntable jacks 120 upward, raising the rotation support table 130 (upper plate 131 and lower plate 135). This releases the lifting support of the vehicle body 2 by the turntable device 110, and the pair of left and right front steel wheels 12F, 12F and the pair of left and right rear steel wheels 12R, 12R are placed on the rails R, R, as shown in Figure 1. If the lower plate 135 is in the reference rotation angle position at this time (if the lower plate 135 has returned to the reference rotation angle position by rotating the vehicle body 2), there is no need to rotate the lower plate 135, and the track-laying work is completed. On the other hand, if the lower plate 135 is not in the reference rotation angle position, the operator operates the turntable rotation device 71 to drive the rotation drive motor 132, rotates the lower plate 135 to the reference rotation angle position, and stores and holds it, thereby completing the track-laying work.
[0047] Furthermore, while the vehicle body 2 is rotating due to the rotary drive motor 132, the vehicle body tilt angle detector 91 Based on the detection signal, the control unit CU checks the tilt angle of the vehicle body 2, and when the control unit CU determines that the tilt angle deviates from a predetermined threshold, the drive of the rotary drive motor 132 is restricted and the rotation of the vehicle body 2 is stopped. Then, according to the rotation angle of the vehicle body 2 determined based on the detection signal from the turntable rotation angle detector 93, the control unit CU adjusts the extension amount of the left telescopic post 121L and the right telescopic post 121R, and the tilt of the vehicle body 2 is corrected.
[0048] The above describes the on-track operation, in which the rail-road work vehicle 1, which has traveled along the road to the level crossing, is transferred to the rails R,R within the level crossing. However, by performing the reverse operation within the level crossing, the rail-road work vehicle 1 can be moved from the rails R,R to the road. In the detour operation, the alignment of the left and right pairs of front steel wheels 12F, 12F and left and right pairs of rear steel wheels 12R, 12R of the vehicle body 2 with the rails R,R is not performed based on detection signals from rail detectors 86, 87, 88, and 89.
[0049] Next, the flow of operation control by the control unit CU when the direction of the vehicle body 2 is changed during track installation work will be explained with additional reference to Figure 12. First, when the direction change (turning) of the vehicle body 2 begins, the control unit CU determines whether the tilt angle of the vehicle body 2 has deviated from a predetermined threshold (S1). If it is determined that it has not deviated, it allows the rotation of the vehicle body 2 (S2) and proceeds to step S3. On the other hand, if it is determined that it has deviated, it restricts the rotation of the vehicle body 2 (S7), corrects the tilt of the vehicle body 2 (S8), and returns to step S1. In step S3, it determines whether an obstacle has been detected. If it is determined that no obstacle has been detected, it allows the rotation of the vehicle body 2 (S4) and proceeds to step S5. On the other hand, if it is determined that an obstacle has been detected, it restricts the rotation of the vehicle body 2 (S9) and returns to step S3. If an obstacle is detected, the process cycles through steps S3 → S9 → S3 until the obstacle is removed. Once the obstacle is removed, the process proceeds from step S3 to step S4, allowing the vehicle body 2 to rotate, and then proceeds to step S5. In step S5, it is determined whether the positions of the pair of front wheels 12F, 12F and the pair of rear wheels 12R, 12R on the left and right of the vehicle body 2 match the positions of the rails R, R. If it is determined that they do not match, the process returns to step S1. If it is determined that they do match, the rotation of the vehicle body 2 is restricted (S6), and the direction change of the vehicle body 2 is completed.
[0050] In addition, in the above-described embodiment, if an obstacle is detected or if the tilt of the vehicle body 2 deviates from a threshold is detected while the vehicle body 2 is rotating due to the rotary drive motor 132, the operator may be alerted by sound, light, etc. Also, during the rotation of the vehicle body 2 in track installation work, the operator may be notified by sound, light, etc. when the positions of the left and right pair of front iron wheels 12F, 12F and the left and right pair of rear iron wheels 12R, 12R of the vehicle body 2 approach the position of rail R, R.
[0051] In the embodiments described above, a rail-road vehicle equipped with a work device for working at heights was used as an example of a rail-road vehicle to which the present invention is applied. However, the present invention is not limited to this, and can be applied to rail-road vehicles equipped with, for example, a crane or other various work devices, as well as to rail-road vehicles for transporting materials that are not equipped with work devices. [Explanation of symbols]
[0052] 1. Rail-road work vehicle 2 car bodies 3S Steering Wheel 3D drive wheels 12F Front Iron Wheel 12R Rear Iron Wheel 70 Control Box 81, 82, 83, 84 Obstacle detectors 86, 87, 88, 89 Rail detectors 91 Vehicle body tilt angle detector 93 Turntable rotation angle detector 110 Turntable 120 Turntable Jack 121L Left-extending post 121R Right-hand telescopic post 130 Rotating Support Table 131 Top plate 132 Rotary drive motor 135 Lower plate CU Control Unit
Claims
1. A turntable for a rail-road vehicle, comprising: a turntable jack mounted on the body of a rail-road vehicle capable of traveling on roads and rails, having road-traveling wheels and rail-traveling wheels, and extending and retracting vertically downward toward the body of the vehicle; a rotating plate support member provided at the lower end of the turntable jack; and a grounding rotating plate rotatably mounted on the lower part of the rotating plate support member around a vertical axis, wherein the turntable device allows the vehicle body to be lifted off the ground by extending the turntable jack downward to ground the grounding rotating plate, and the direction of the vehicle body to be changed by rotating the rotating plate support member and the turntable jack relative to the grounding rotating plate, A rotary drive device is provided that, with the grounding rotating plate in contact with the ground and the vehicle body lifted from the ground, rotates the rotating plate support member relative to the grounding rotating plate to change the direction of the vehicle body, In a situation where the vehicle body is being turned by the aforementioned rotary drive device, a track position detector capable of detecting whether or not the positions of the track-running wheels and the track coincide, A turntable for a rail-road vehicle, comprising: a rotational operation control device that restricts the rotational operation of the rotating plate support member by the rotational drive device when the track position detector detects that the positions of the track-running wheels and the track coincide while the vehicle body is being turned by the rotational drive device.
2. The vehicle body is equipped with an obstacle detector that detects obstacles in the direction of rotational movement of the vehicle body which is changed direction by the aforementioned rotary drive device, The turntable for rail-road vehicles according to claim 1, characterized in that when the obstacle detector detects the presence of an obstacle in the direction of rotational movement of the vehicle body, the rotational operation control device restricts the rotational operation of the rotational drive device of the rotational plate support member.
3. The vehicle body tilt angle detector is provided to detect the tilt angle of the vehicle body which is changed in direction by the aforementioned rotary drive device, The turntable for rail-road vehicles according to claim 1 or 2, characterized in that when the inclination angle of the vehicle body detected by the vehicle body inclination angle detector deviates from a predetermined threshold, the rotation operation control device restricts the rotation operation of the rotation plate support member by the rotation drive device.
4. The aforementioned turntable jack has two telescopic post sections arranged side by side at a distance from each other and independently capable of extending and retracting in the vertical direction, and is configured to extend and retract in the vertical direction by the extension and retraction of these two telescopic post sections. The rotating plate support member is attached so as to connect the lower ends of the two telescopic post sections. A rotation angle detector capable of detecting the rotation angle position of the rotating plate support member relative to the grounding rotating plate, The turntable for rail-road vehicles according to claim 3, further comprising a vehicle body tilt angle correction control device that, when the tilt angle of the vehicle body detected by the vehicle body tilt angle detector deviates from the threshold, adjusts the extension amount of each of the two telescopic post portions based on the rotation angle position of the rotating plate support member detected by the rotation angle detector to correct the tilt angle of the vehicle body.