JP2007331505A - Vehicle body posture restoration device in vehicle body tilt controller of railway car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body posture restoration device in vehicle body tilt control of a railway car capable of certainly detecting abnormal rise of an air spring without interposing an electric means when vehicle body tilt control using the air spring fails, and capable of rapidly causing the vehicle body to restore a horizontal posture by instantly emitting a large volume of air in the air spring. <P>SOLUTION: A safety valve 22 for making an exhaust volume at least larger than of a supply system in a pressure air supply/exhaust system to the air spring 3, and for opening/closing the safely valve 22 by pilot pressure is interposed at a guiding branch 33 by branching a flow path 31 of the pressure air supply/exhaust system to the air spring 3. The guiding branch 33 has its bore larger than that of the flow path 31 of the pressure air supply/exhaust system, and has its end open to the atmosphere. When an abnormality occurs in a vehicle body tilt controller 10 and the height of the air spring 3 excessively rises, a pilot valve 23 is opened through a pilot pressure releasing valve 24 by an air spring height detection means 6a, and the air in the air spring 3 is exhausted by pressuring and opening the safely valve 22 by the pilot pressure. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention supports a vehicle body on a carriage via a pair of left and right air springs, detects the height of the left and right air springs by air spring height detection means, and keeps the vehicle body constant by an automatic height adjustment valve. The vehicle body of a railway vehicle that adjusts the height or forcibly leans the vehicle body to one side by adjusting the height of the left and right air springs by a pressurized air supply / exhaust system dedicated to vehicle body inclination control More particularly, the present invention relates to a vehicle body posture return device that reliably detects an excessive rise (abnormal rise) of an air spring and quickly returns the vehicle body to a horizontal position.

  As a prior art of the vehicle body posture returning device that returns the vehicle body horizontally when the air spring is excessively raised in the above-described vehicle body tilt control device, as shown in FIG. The provided lever 59 rotates downward in response to the rise of the air spring, and the contact piece 57 attached to the rotating shaft 56a that rotates integrally with the lever 59 contacts the plunger 58a of the exhaust valve 58, thereby exhausting. A structure in which the valve 58 is opened and the air spring is exhausted has been proposed (see, for example, Patent Document 1).

As another prior art, as shown in FIG. 9, the exhaust valve is replaced with a limit switch 68, and an eccentric cam 67 in place of the contact piece 57 is in contact with the limit switch 68 and the limit switch 68 is operated. Then, the power supply of the solenoid valve for supplying / exhausting air to the air spring for performing the vehicle body tilt control and the shutoff valve for shutting off the route to the automatic height adjusting valve 56 for the control is cut off, and the automatic height adjustment is performed. There has been proposed a structure in which the air spring is exhausted by the valve 56 and the air spring is returned to the standard height (see also Patent Document 1).
Japanese Patent Laid-Open No. 11-78875 (paragraphs 0011 to 0027 and FIGS. 6 and 11)

However, each prior art (the former and the latter) described in Patent Document 1 described above has room for improvement in the following points. That is,
In the former case (see Fig. 8), the exhaust valve can only be opened within the range in which the air spring is abnormally rising, so it is possible to suppress the abnormal increase, but the air spring is at the standard height (horizontal state). It is impossible to return to

  In the case of the latter (see FIG. 9), the air spring can be returned to the standard height unlike the former, but since it is a return by exhaust using an automatic height adjustment valve, a considerable amount of time is required to return. Takes a quick return. That is, at the time of vehicle body tilt control, the flow path between the automatic height adjustment valve and the air spring is shut off by the shut-off valve, and air supply / exhaust to the air spring is performed by the pressurized air supply / exhaust system dedicated to the vehicle body tilt control. On the other hand, when performing mechanical body posture control using the automatic height adjustment valve when not controlled, the automatic height adjustment valve functions to maintain the vehicle body posture state equivalent to that of a conventional vehicle when not controlled. This is a prerequisite. When the vehicle body tilt control fails, it is required that the vehicle body has a function of quickly returning the vehicle body to a horizontal state from the state where the vehicle body is inclined to one side. Exhaust has a non-buffering area where the exhaust valve does not operate until the lever rotates by a predetermined angle. Therefore, when the lever starts to rotate, the exhaust amount remains zero, and then the exhaust amount suddenly increases and is kept almost constant. The exhaust amount is a constant rate irrespective of the height of the air spring, that is, exhaust is performed to the end without changing the exhaust flow rate. Therefore, it is difficult to immediately return a large amount of air in the air spring exceeding the reference height to quickly return the vehicle body to a horizontal posture.

  Further, since the air spring is exhausted using an electric circuit by a limit switch, reliability in fail-safe is lacking compared to mechanical means.

  The present invention has been made in view of the above points. In a railway vehicle that performs vehicle body tilt control (including normal vehicle body posture control) using an air spring, an electrical means is not used at the time of vehicle body tilt control failure. Providing a vehicle body posture return device for vehicle body tilt control that can detect abnormal rises in air springs and immediately discharge large volumes of air in the air springs to quickly return the vehicle body to a horizontal posture. The purpose is to do.

  In order to achieve the above object, a vehicle body posture return device in a vehicle body tilt control device according to the present invention supports a vehicle body via a pair of left and right air springs on a carriage, and includes air spring height detection means. The height of the left and right air springs is detected, and the vehicle body is adjusted to a constant height by an automatic height adjustment valve, or the height of the left and right air springs is adjusted by a pressurized air supply / exhaust system dedicated to vehicle body tilt control. In a vehicle body tilt control device for forcibly tilting the vehicle body to one side by adjusting the pressure, the exhaust capacity is made larger than at least the air supply system of the pressurized air supply / exhaust system to the air spring, and A safety valve that opens and closes with a pilot pressure is provided by branching the flow path of the pressurized air supply / exhaust system to the air spring and interposed in the branch path. Enlarging and one end of the atmosphere When the air spring height rises excessively due to an abnormality occurring in the vehicle body tilt control device, the pilot valve is opened by the air spring height detecting means, and the safety valve is pressurized and opened by the pilot pressure. The air in the air spring is configured to be exhausted.

  According to the vehicle body posture returning apparatus having the above-described configuration, the heights of the left and right air springs are kept constant by the automatic height adjustment valves during normal traveling. On the other hand, when the vehicle body tilt control is activated when traveling on a curved road, for example, the shutoff valve shuts off the air circuit that passes through the automatic height adjustment valve, and air supply / exhaust to the air spring by the air supply / exhaust system dedicated to vehicle body tilt control Carried out. In this state, if an abnormality occurs in the vehicle body tilt control and the air spring height rises excessively, the pilot valve operates, the pilot pressure acts on the safety valve, the safety valve is pressurized, and the communication path to the atmosphere (atmosphere) The opening is opened, and the air in the air spring is discharged. Even if the supply of pressurized air from the air supply valve dedicated to vehicle body tilt control to the air spring is continued in this state, the exhaust capacity of the safety valve is compared with the amount supplied by the air supply valve dedicated to vehicle body tilt control. Since the air spring is enlarged, the air in the air spring is discharged smoothly, and the height of the air spring is quickly contracted to return to the standard height. In addition, not only in the operation state of the vehicle body tilt control, but also when the air spring height rises excessively in a state where the left and right air springs are maintained at a constant height by the automatic height adjustment valve during normal traveling, Similarly, the pilot valve operates, the pilot pressure acts on the safety valve, the safety valve is pressurized, the communication path (atmosphere release port) with the atmosphere is opened, and the air in the air spring is discharged.

  The vehicle body posture return device in the vehicle body tilt control device for a railway vehicle (Claim 2) supports the vehicle body via a pair of left and right air springs on the carriage, and the left and right air springs by air spring height detection means. An automatic height adjustment valve that detects the height of the vehicle and adjusts the vehicle body to a constant height, and a pressurization dedicated to vehicle body tilt control, which is separate from the pressurized air supply system that passes through the automatic height adjustment valve In a vehicle body inclination control device for a railway vehicle provided with an air supply / exhaust system, a shutoff valve is provided in a flow path between the automatic height adjustment valve and the air spring, and the shutoff valve performs the shutoff valve during vehicle body tilt control. The flow path between the automatic height adjustment valve and the air spring is shut off, and the air spring is supplied and exhausted by a pressurized air supply / exhaust system dedicated to the vehicle body tilt control. It is configured to perform vehicle body posture control by a valve, and the pressurization The air supply / exhaust system has a capacity that is at least larger than that of the air supply system, and a safety valve that opens and closes with pilot pressure is a branch path that branches the supply / exhaust system flow path to the air spring and opens one end to the atmosphere. The branch passage also has a larger diameter than the flow path of the air supply / exhaust system, and a pilot valve and a pilot pressure release valve are interposed in series in this order between the pressurized air source and the safety valve, The air spring height detection means opens and closes the pilot valve and the pilot pressure release valve, and normally the pilot valve is opened and the pilot pressure release valve is closed, while the air spring height is excessive. The pilot valve is closed before the valve is lifted, and the pilot pressure release valve is set to be opened when the air spring height is excessively increased.

  According to the vehicle body posture returning apparatus having the above-described configuration, the heights of the left and right air springs are kept constant by the automatic height adjustment valves during normal traveling. On the other hand, when the vehicle body tilt control is activated when traveling on a curved road, the air circuit via the automatic height adjustment valve is shut off by the shutoff valve, and the air spring is supplied and exhausted by the air supply and exhaust system dedicated to the vehicle body tilt control. Is done. In this state, if an abnormality occurs in the vehicle body tilt control and the air spring height rises excessively, the pilot valve is activated and opened, and the pilot pressure is supplied from the pressurized air source to the safety valve via the pilot pressure release valve. Acting, the safety valve is pressurized, the communication path (atmosphere opening port) with the atmosphere is opened, and the air in the air spring is discharged. The pilot pressure release valve is in a closed state (a state in which the pilot pressure acts on the safety valve) when the air spring is operated near the standard height (preferably slightly higher), so when the pilot valve is opened At the same time, pilot pressure acts on the safety valve. In addition, when the pilot valve is exhausted from the air spring and falls below the maximum rising height, the pilot valve is activated and closed, but the pilot pressure is maintained in the state of acting on the safety valve, so the exhaust from the air spring releases the pilot pressure. The operation continues until the valve is activated and opened (the pilot valve does not act on the safety valve), in other words, until the air spring returns to or close to the standard height.

  According to a third aspect of the present invention, there is provided a vehicle body inclination air supply / exhaust pipe shut-off valve that is opened and closed by a pilot pressure in a flow path of the pressurized air supply / exhaust system dedicated to the vehicle body inclination control. The opening / closing operation of the road shutoff valve can also be performed by the air spring height detecting means via the pilot valve and the pilot pressure release valve. Here, the vehicle body inclined supply / exhaust line shut-off valve is normally opened, the safety valve is normally closed, and both safety valves are opened and closed in the opposite direction.

  With this configuration, when the air spring rises excessively, the safety valve is opened to discharge the air in the air spring, and at the same time, the air spring is pressurized from the pressurized air source through the control air supply / exhaust system. Since the supply of air is shut off by the vehicle body inclined supply / exhaust pipe shutoff valve, the time required for the height of the air spring to return to the standard height can be further shortened, and the vehicle body can be restored more reliably.

  According to a fourth aspect of the present invention, the shutoff valve is opened during the vehicle body tilt control failure, and can be switched to a pressurized air supply system using the automatic height control valve.

  In this way, for example, in the state where the vehicle body is tilted to one side by the vehicle tilt control and the direction of tilt is reversed or when the air spring is abnormally stretched, the air in the air spring that has been expanded and increased is increased. Is discharged and quickly returned to the standard height, and thereafter it can be maintained at a constant height by the automatic height adjustment valve.

  The safety valve may be an air operated valve.

  If it does in this way, an air operation valve can be opened and closed by pilot pressure.

The vehicle body posture return device in the vehicle body tilt control device according to the present invention has the following excellent effects. That is, the vehicle body posture return device of the present invention is a safety device that can be applied to a railway vehicle equipped with an air spring regardless of the presence or absence of a vehicle body control mechanism that forcibly tilts the vehicle body to one side when traveling on a curved road or the like. During normal traveling, the height of the left and right air springs is kept constant by the automatic height adjustment valve, and when traveling on a curved road, in the operating state of the vehicle body tilt control, it passes through the automatic height adjustment valve by the shut-off valve. The air circuit is shut off, and air supply / exhaust to the air spring is performed by an air supply / exhaust system dedicated to vehicle body tilt control. In any of these conditions, if an abnormality occurs and the air spring height rises excessively (the amount of air in the air spring exceeds the reference value and the height becomes excessively high), the pilot valve operates. The pilot pressure is applied to the safety valve from the pressurized air source via the pilot pressure release valve, the safety valve is pressurized and the communication path (atmosphere release port) to the atmosphere is opened, and the air in the air spring is released. Discharged. As a result, the vehicle body can be quickly lowered and returned to the horizontal position, so that the safety in traveling is high and the time that adversely affects the riding comfort can be shortened in a very short time. And
1) Since the pilot pressure for opening and closing the safety valve can be easily controlled by using the pilot valve and the pilot pressure release valve, the return of the air spring height, which has been difficult in the past, can be reliably realized.

  2) Since there are many types of safety valves and the degree of freedom of selection is large, it is possible to quickly return the air spring height.

  3) Since the main part of the vehicle body posture return device can be configured with only the pneumatic circuit and the mechanical operating mechanism, the structure is more than that of a similar device using conventional electric air spring upper limit regulating means and vehicle body tilt control abnormality judging means. Is simple and does not use electrical means, so it is highly reliable.

  Embodiments of a vehicle body posture return device in a vehicle body tilt control device for a railway vehicle according to the present invention will be described below with reference to the drawings.

  FIG. 1 is an air circuit diagram showing an embodiment of a vehicle body posture return device in a vehicle body tilt control device of a railway vehicle according to the present invention, and FIG. 2 is an opening / closing operation of a pilot valve and a pilot pressure release valve in the vehicle body posture return device of FIG. FIG. 3 shows an embodiment of a specific mechanism in which an automatic height adjustment valve (leveling valve, hereinafter referred to as LV), a pilot valve, and a pilot pressure release valve in FIG. 4 is a right side view of FIG. FIG. 5 is a front sectional view of a vehicle schematically showing a vehicle body inclination control device having a vehicle body posture return device according to an embodiment of the present invention. In the case of the railway vehicle 1 of this example, the vehicle body inclination control device is shown. 11 includes a vehicle body tilt control means 10.

  As shown in FIG. 5, the railway vehicle 1 includes a vehicle body 2 and carts 5 at front and rear portions of the vehicle body 2. Air springs 3 are installed on the left and right carts 5 on the front and rear, and the vehicle body 2 is placed on a pair of left and right air springs 3 and 3 and is elastically supported. The bogie frame 50 of the bogie 5 and the bottom of the vehicle body 2 are connected by a traction device (not shown). Each carriage 5 includes wheels 52 and 52 on both sides of an axle 51, and each wheel 52 is placed on a rail 55 so as to be able to travel.

  Further, the vehicle 1 includes an automatic height adjustment air supply / exhaust system 6 'for keeping the height of the vehicle body 2 constant with respect to passengers getting on and off, load fluctuations during traveling, and the like when traveling on a curved road. Further, a vehicle body tilt control air supply / exhaust system 10 ′ for forcibly tilting the vehicle body 2 toward the inner track side on the carriage 5 is provided.

  The automatic height adjustment air supply / exhaust system 6 'has, as main components, an automatic height adjustment valve (leveling valve, hereinafter referred to as LV) 6 and 6 with a pair of left and right air spring height sensors (air spring height detecting means). I have. The LVs 6 and 6 are installed on both sides of the bottom of the vehicle body 2 on both sides of the bogie frame 50, and extend horizontally from one end of the lever (air spring height detecting means) 6a of each LV 6 and 6 and the bogie frame 50 to the side. The tip of the provided support tool 53 is connected by a connecting rod 6c that extends upward, which will be described later. On the other hand, the vehicle body tilt control air supply / exhaust system 10 ′ includes a pair of left and right control air supply / exhaust valves 10, 10 as main components.

  Each control supply / exhaust valve 10, 10 is connected to a corresponding left or right air spring 3 via a pipe 32, and each LV 6, 6 is directly connected to a corresponding LV shut-off valve 7, 7 and a corresponding pipe 31. It is connected to the left or right air spring 3. Each of the LVs 6 and 6 and the control supply / exhaust valves 10 and 10 are connected to an air tank 15 as a source air reservoir (a pressurized air source) by pipes 31 ′ and 32 ′.

  The vehicle body tilt control means 8 closes the LV cutoff valves 7 and 7 when the vehicle 1 travels on a curved road. Then, the control air supply / exhaust valves 10 and 10 are controlled to open and close based on the data of the curved road, and the vehicle body tilt control is performed to tilt the vehicle body 2 toward the inner track side. Specifically, the pressurized air is supplied from the air tank 15 only to the air spring 3 on the outer gauge side of the left and right air springs 3 or 3, or the air in the air spring 3 on the inner gauge side is discharged at the same time. By adjusting (changing) the height of the left and right air springs 3 and 3, the vehicle body 2 is forcibly tilted toward the inner gauge, reducing the centrifugal force that acts on the vehicle body 2 when traveling on curved roads. It is possible to improve the ride comfort of passengers and at the same time speed up by running on a curved road without reducing the running speed.

  Thus, when the vehicle 1 passes through the curved road, the LV shutoff valves 7 and 7 are opened, and at the same time, the control supply / exhaust valves 10 and 10 are closed. In the state where the LV shutoff valves 7 and 7 are opened and the control air supply and exhaust valves 10 and 10 are closed, the left and right LVs 6 and 6 as the automatic height adjustment air supply and exhaust system 6 'are the rotation angle of the lever 6a. The vehicle body 2 is maintained at a constant height and level by supplying pressurized air from the air tank 15 to the left and right air springs 3 and 3 according to the direction of rotation, and discharging air from the air springs 3 and 3. 2 automatic height adjustment is performed.

  The vehicle body posture returning device 21 which is a characteristic part of the present invention branches a pressurized air supply pipe 31 to the air spring 3 as shown in FIG. 1 showing one air spring 3 and its air circuit. One end of the branch pipe 33 is opened to the atmosphere, and an air operation valve (safety valve) 22 is provided in the branch pipe 33. The air actuated valve 22 has a larger diameter than the pressurized air supply pipe 31 and the vehicle body inclination control pipe 32, and the branch pipe 33 has a larger diameter than the pipes 31 and 32. Is used. On the other hand, the pilot pressure supply pipe 34 is branched from a pipe 31 ′ that connects both the LV 6 and the air tank 15 in order to control the opening and closing of the air operating valve 22. The pilot pressure supply pipe 34 is provided with a pilot valve 23 of a 2-port 2-position switching valve and a pilot pressure release valve 24 of a 3-port 2-position switching valve connected in series in this order. Is connected to the pilot pressure inlet 22 a of the air operating valve 22.

  In this example, as shown in FIG. 6A, a two-position switching air operated valve having three ports of A port, P port, and R port is used as the air operating valve 22, and in the normal state, the spool 22b is provided. The A port and the R port are urged upward by the spring 22c, and in this example, since the commercially available three-port air operated valve 22 is used, the R port is blocked by the plug 22d. . One end of the branch pipe 33 is connected to the A port of the air operated valve 22, but the R port is closed, so that the air operated valve 22 is normally closed. When the pilot pressure acts on the air operating valve 22 and the spool 22b descends against the spring 22c as shown in FIG. 6B, the A port and the P port communicate with each other and the air is released.

  The pilot valve 23 and the pilot pressure release valve 24 that control the opening and closing of the air operating valve 22 are provided with roller levers 23a and 24a, plungers (not shown), and the like, and mechanically switches the pilot pressure air circuit by mechanical operation. A valve is used. In this example, as shown in FIG. 3, the pilot valve 23 and the pilot pressure release valve 24 are assembled to the existing LV valve 6 symmetrically about the valve shaft 6b of the lever 6a as air spring height detecting means. Yes. As shown in FIG. 4, the valve shaft 6b of the lever 6a of the LV valve 6 is extended, and an eccentric cam 6c is attached to the valve shaft extension 6b so as to be integrally rotatable. Roller portions 23b and 24b of roller levers 23a and 24a of the pilot valve 23 and the pilot pressure release valve 24 abut on the eccentric cam 6c, and the eccentric cam 6c is rotated by the rotation of the lever 6a. The release valve 24 is opened and closed. In this example, as shown in FIG. 2, in a normal state, that is, when the air spring 3 is at or near the standard height, the pilot valve 23 is opened and the pilot pressure release valve 24 is closed. In this example, when the air spring 3 slightly rises from the normal state and exceeds the standard height, the pilot valve 23 is closed, but the pilot pressure release valve 24 is kept closed, and the air spring 3 remains at the upper limit (maximum The pilot pressure release valve 24 is opened when the height reaches (upward height), but the pilot valve 23 is configured to remain closed until the end.

  As described above, the vehicle body posture return device 21 according to the present invention is configured. Here, operations of the vehicle body tilt control device 11 and the vehicle body posture return device 21 will be described with reference to FIGS. 1 and 5.

  In the normal running state, the lever 6a of the LV valve 6 is substantially horizontal as shown in FIG. 3, and the pilot valve 23 and the pilot pressure release valve 24 do not operate. That is, since the pilot valve 23 is already in the closed state and the pilot pressure release valve 24 is in the open state, no pilot pressure is generated. Therefore, the air operating valve 22 is in the closed state shown in FIG. Absent. In this state, the automatic height adjustment air supply / exhaust system 6 'is functioning, and the base end is fixed to the LV (height control valve) 6, 6 and the valve shaft 6b of these LV 6, 6 so as to be integrally rotatable. In addition to the lever 6a, the lever 6a and a connecting rod 6d for connecting the support frame 53 of the carriage frame 50 are provided, and the distance (interval) between the carriage 5 and the vehicle body 2 is constant even when the load of the vehicle body 2 changes. In other words, the supply / exhaust control is mechanically performed by the LVs 6 and 6 so that the height of the air springs 3 and 3 is always constant. In the vehicle body posture return device 21 according to the present invention, an abnormality occurs and the air spring 3 rises excessively in a state where the vehicle body 2 is controlled to be kept at a constant height by the LVs 6 and 6 during normal travel. However, the specific operation is common to the operation during the vehicle body tilt control and will be described later.

  On the other hand, the shift from the automatic height adjustment control to the vehicle body tilt control is data relating to a curved road (for example, the start position of the curved road, the curve radius, the cant amount), the traveling direction (up / down), etc. In this example, the vehicle-related data is transmitted / received using ATC, and the vehicle body tilt control means 10 receives the position correction signal and the traveling speed signal of the vehicle 1 from an external device on the track or an instrument in the vehicle 1. The vehicle body inclination control means 10 determines the necessary inclination angle of the vehicle body 2 in consideration of the radius of curvature of the curved road, the cant amount of the curved road, the traveling speed of the vehicle 1, etc., and the vehicle body 2 is controlled to be inclined. Is done. When the vehicle body tilt control is performed, pressurized air is supplied to the air spring 3 on the outer gauge side, and when the height of the air spring 3 rises, the pilot 6a and the eccentric cam rotate to pilot through the roller lever 24a. The pressure release valve 24 is activated and closed. However, at this point, since the pilot valve 23 is not operated and is closed, the air operated valve 22 is not operated, that is, since it is closed, the air spring 3 rises and becomes high. Yes. It is assumed that an abnormality occurs in this state and the height of the air spring 3 exceeds the reference maximum height and becomes excessively high.

  When the air spring 3 reaches the upper limit and the lever 6a and the eccentric cam 6c rotate, the pilot valve 23 is operated via the roller lever 23a to be in an open state. Here, the pilot pressure circuit from the air tank 15 to the pilot pressure introduction port 22a of the air operating valve 22 is opened, and the air operating valve 22 switches the spool against the spring as shown in FIG. Is in communication with the P port, that is, the air operated valve 22 is opened. Since the diameter of the branch pipe 33 and the air operated valve 22 (the passage from the A port to the P port) is larger than the diameter of the pipes 31 and 32, the supply of pressurized air to the air spring 3 continues. Even in this state, the air in the air spring 3 is discharged and the height of the air spring 3 is lowered. When the height of the air spring 3 falls below the upper limit, the pilot valve 23 is closed via the roller lever 23a by the rotation of the lever 6a and the eccentric cam 6c. As a result, the pilot pressure circuit to the air operated valve 22 is closed, but if the pilot pressure is applied once to the air operated valve 22, the pressurized state continues unless the pilot pressure is released from the pilot pressure release valve 24. The discharge of air from the air spring 3 continues. When the air spring 3 returns to the standard height, the pilot release valve 24 is opened via the roller lever 24a by the rotation of the lever 6a and the eccentric cam 6c, so that it acts on the pilot pressure inlet 22a of the air operating valve 22. The pilot pressure which has been released is released, and the air operating valve 22 is closed by the spool 22b being switched by the urging force of the spring 22c. Thereby, the exhaust from the air spring 3 is completed.

  Next, FIG. 7 is an air circuit diagram showing another embodiment of the vehicle body posture returning apparatus according to the present invention, which corresponds to FIG.

  The vehicle body posture return device 21 ′ of the vehicle body tilt control device 11 according to this embodiment is different from the above embodiment in that the control air supply / exhaust valve 10 and the air in the left and right vehicle body tilt control air supply / exhaust system 10 ′ as shown in FIG. This is because an air-actuated valve (vehicle body inclined supply / exhaust pipe shutoff valve) 25 as a safety valve is interposed in the pipe 32 connecting the spring 3. As the air actuated valve 25 used in this example, a 2-position switching air operated valve having three ports of A port, P port, and R port, which is operated by a pilot pressure like the air actuated valve 22, is used. The valve 23 and the pilot pressure release valve 24 are used for opening and closing operations. However, unlike the air actuated valve 22, the air actuated valve 25 is closed by plugging the R port of the air actuated valve 22 shown in FIG. 6 with a plug 22d so that the P port is opened. deep. Since other configurations are the same as those in the embodiment shown in FIG. 1, common members are denoted by the same reference numerals in FIG. 7 and description thereof is omitted.

  In the vehicle body posture return device 21 ′ of the present embodiment, when the air spring 3 rises excessively, the air operating valve 22 is opened to discharge the air in the air spring 3, and at the same time, the control air supply / exhaust valve is discharged from the air tank 15. Since the supply of pressurized air to the air spring 3 is stopped via 10, the time required for the height of the air spring 3 to return to the standard height is further shortened, and the vehicle body is returned more reliably. . Although the air operated valves 22 and 25 are shown as an example of the safety valve, the present invention is not limited to this, and it goes without saying that various air operated valves operated by pilot pressure can be used.

It is an air circuit diagram showing an embodiment of a vehicle body posture return device in a vehicle body tilt control device of a railway vehicle according to the present invention. FIG. 2 is a diagram (valve timing chart) showing a relationship between an opening / closing operation and an operation timing of a pilot valve and a pilot pressure release valve in the vehicle body posture return device of FIG. 1. FIG. 2 is a front view showing an embodiment of a specific mechanism in which an automatic height adjusting valve (leveling valve, hereinafter referred to as LV), a pilot valve, and a pilot pressure release valve in FIG. 1 are integrated. FIG. 4 is a right side view of FIG. 3. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front cross-sectional view of a vehicle schematically showing a vehicle body tilt control device for a railway vehicle equipped with a vehicle body posture return device according to an embodiment of the present invention. FIG. 6A is a cross-sectional view showing a normal state (closed state) of an air operated valve as an example of a safety valve, and FIG. 6B is a cross-sectional view showing an open state of the air operated valve. It is an air circuit diagram which shows another Example of the vehicle body attitude | position return apparatus which concerns on this invention, and respond | corresponds to FIG. It is a perspective view which shows the prior art example of a vehicle body posture return apparatus. It is a perspective view which shows another prior art example of a vehicle body posture return apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Railcar 2 Car body 3 Air spring 5 Carriage 6 'Automatic height adjustment supply / exhaust system 6 LV (leveling valve / automatic height adjustment valve)
6a lever (air spring height detection means)
6b valve shaft 6c eccentric cam 6d connecting rod 7 LV shut-off valve (switching valve)
8 Car body tilt control means 10 'Car body tilt control air supply / exhaust system 10 Control air supply / exhaust valve 11 Car body tilt control device 15 Air tank (pressurized air source)
21 · 21 ′ body posture return device 22 safety valve (air operated valve; air operated valve)
23 Pilot valve 24 Pilot pressure release valve 25 Car body inclined supply / exhaust line shut-off valve (air operated valve; air operated valve)
50 bogie frame

Claims (5)

The vehicle body is supported on the carriage via a pair of left and right air springs, and the height of the left and right air springs is detected by air spring height detection means, and the vehicle body is adjusted to a constant height by an automatic height adjustment valve. Or a vehicle body tilt control device for a railway vehicle that forcibly tilts the vehicle body to one side by adjusting the height of the left and right air springs by a pressurized air supply / exhaust system dedicated to vehicle body tilt control,
A safety valve that opens and closes with a pilot pressure is made larger than at least the air supply system of the pressurized air supply / exhaust system to the air spring, and the flow path of the pressurized air supply / exhaust system to the air spring is branched And the branch path has a larger diameter than the flow path of the pressurized air supply / exhaust system and opens one end to the atmosphere,
When an abnormality occurs in the vehicle body tilt control device and the air spring height rises excessively, a pilot valve is opened by the air spring height detection means, and the air spring is pressurized and opened by pressurizing the safety valve with a pilot pressure. A vehicle body posture return device in a vehicle body tilt control device for a railway vehicle, characterized in that the air inside the vehicle is exhausted. An automatic height adjustment valve that supports the vehicle body via a pair of left and right air springs on the carriage and detects the height of the left and right air springs by an air spring height detection means to adjust the vehicle body to a constant height. And a vehicle body tilt control device for a railway vehicle equipped with a pressurized air supply / exhaust system dedicated to vehicle body tilt control, which is a separate system from the pressurized air supply system via the automatic height adjustment valve,
A shutoff valve is provided in the flow path between the automatic height adjustment valve and the air spring, and the flow path between the automatic height adjustment valve and the air spring is shut off by the shutoff valve during vehicle body tilt control. In addition, while performing supply and exhaust to the air spring by the pressurized air supply and exhaust system dedicated to the vehicle body tilt control, the vehicle body posture control by the automatic height adjustment valve when not controlled,
A safety valve having a capacity larger than that of at least the air supply system of the pressurized air supply / exhaust system and opened / closed by a pilot pressure is branched into the air supply / exhaust system flow path to the air spring and one end is opened to the atmosphere. Intervening in the branch path, this branch path also has a larger diameter than the flow path of the air supply and exhaust system,
A pilot valve and a pilot pressure release valve are provided in series in this order between a pressurized air source and the safety valve, and the pilot valve and the pilot pressure release valve are opened and closed by the air spring height detecting means. In the normal state, the pilot valve is opened and the pilot pressure release valve is closed. On the other hand, the pilot valve is closed and the air spring height is excessively increased before the air spring height is excessively increased. A vehicle body posture return device in a vehicle body tilt control device for a railway vehicle, wherein the release valve is set to open. A vehicle body inclination air supply / exhaust line shut-off valve that opens and closes with a pilot pressure is interposed in the flow path of the pressurized air supply / exhaust system dedicated to the vehicle body inclination control. 3. The vehicle body posture return device in a vehicle body tilt control device for a railway vehicle according to claim 2, wherein the pilot height and the pilot pressure release valve are used by a spring height detection means.   4. The vehicle body tilt control device for a railway vehicle according to claim 2, wherein the shut-off valve is opened during the vehicle body tilt control failure and is switched to a pressurized air supply system by the automatic height control valve. Body posture return device.   The vehicle body posture return device in a vehicle body tilt control device for a railway vehicle according to any one of claims 1 to 4, wherein the safety valve is an air operated valve.

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