JP2024075301A - Door opening/closing device for railroad vehicle - Google Patents

Abstract

To provide a door opening/closing device for railroad vehicle for reducing the number of components.SOLUTION: A door opening/closing device for railroad vehicle includes a motor for performing opening/closing drive of a first door and a second door provided in a railroad vehicle, a first boss 31 for transmitting rotary motion of the motor to a drive pulley 21 for driving the first door, a second boss 32 engaged with the first boss 31 to convert the rotary motion into linear motion in the thickness direction of the first door, and a lock plate 44 provided in the second door to lock the second door by being engaged with a lock piston 41 provided in the second boss 32 when the second door is located at a fully closed position.SELECTED DRAWING: Figure 3

Description

The present invention relates to a door opening and closing device for railway vehicles.

The railway vehicle door opening and closing device described in Patent Document 1 includes a drive unit that drives the sliding door, a drive mechanism that transmits the driving force of the drive unit to the sliding door, and a locking mechanism that locks the sliding door in a closed position. The locking mechanism has a locked member attached to the sliding door, and a locking member that is attached to the car body and can be displaced between a locked position where the locked member is locked and an unlocked position where the locked member is not locked. The opening and closing device includes a detection means that detects the amount of drive of the drive mechanism, and a control means that displaces the locking member to the locked position when it recognizes from the amount of drive of the drive mechanism that the sliding door is in the closed position.

JP 2014-12508 A

The locking mechanism for railway vehicle doors described in Patent Document 1 above includes a detection means for detecting the amount of drive of the drive mechanism, and an actuator for driving the locking member that is separate from the drive device that drives the sliding door. For this reason, there is a demand for a locking device that reduces the number of parts and reduces costs.

A railway vehicle door opening and closing device that solves the above problems includes a motor that drives the opening and closing of a door provided on the railway vehicle, a rotating part that transmits the rotational motion of the motor to a pulley that drives the door, a conversion part that meshes with the rotating part and converts the rotational motion into linear motion in the thickness direction of the door, and an engaged part that is provided on the door and engages with the conversion part to lock the door when the door is in a fully closed position.

According to the above configuration, the rotating part transmits the rotational motion of the motor to the pulley, and the converting part converts the rotational motion of the motor into linear motion, and the converting part engages with the engaged part provided on the door by the linear motion in the thickness direction of the door. Therefore, since the converting part is driven by the motor that drives the pulley, there is no need for a separate drive device to drive the locking device that secures the door. This makes it possible to reduce the number of parts.

In the above railway vehicle door opening and closing device, it is preferable that the engaged portion includes a recess that engages with the conversion portion, and a guide portion that guides the conversion portion into the recess.
In the above railway vehicle door opening and closing device, it is preferable that the conversion portion includes an engaging portion that engages with the engaged portion, and a spring that urges the engaging portion toward the engaged portion.

In the above railway vehicle door opening and closing device, it is preferable that the engagement portion passes through a rotation center of the pulley.
In the above-mentioned railway vehicle door opening and closing device, it is preferable that the engaged portion includes a displacement portion that is displaced relative to the door, and the engaged portion is displaced by the displacement portion when the conversion portion contacts the guide portion.

In the above railway vehicle door opening and closing device, it is preferable that the engaged portion includes a spring that biases the engaged portion toward the conversion portion.
In the above-mentioned railway vehicle door opening and closing device, it is preferable that the door is a plug door that moves in the width direction of the door as well as in the thickness direction of the door, and is located inside the body of the railway vehicle when fully open, and the conversion unit presses the door in the thickness direction of the door.

In the above-mentioned railway vehicle door opening and closing device, the door comprises a first door and a second door that open from both sides, and it is preferable that the motor, the pulley, the rotating unit, and the conversion unit are provided at the top of the first door, and the engaged unit is provided at the top of the second door and extends to the top of the first door.

The present invention allows the number of parts to be reduced.

1 is a front view showing a schematic configuration of a railway vehicle door opening and closing device; 1 is a plan view showing a schematic configuration of a railway vehicle door opening and closing device; 2 is a cross-sectional view showing an unlocked state of a drive mechanism of the railway vehicle door opening and closing device of the first embodiment. FIG. 4 is a cross-sectional view showing a transition from an unlocked state to a locked state of the drive mechanism of the railway vehicle door opening and closing device of the embodiment. FIG. 4 is a cross-sectional view showing a transition from an unlocked state to a locked state of the drive mechanism of the railway vehicle door opening and closing device of the embodiment. FIG. 2 is a cross-sectional view showing a locked state of the drive mechanism of the railway vehicle door opening and closing device of the embodiment. FIG. FIG. 11 is a cross-sectional view showing an unlocked state of a drive mechanism of a railway vehicle door opening and closing device according to a second embodiment. 4 is a cross-sectional view showing a transition from an unlocked state to a locked state of the drive mechanism of the railway vehicle door opening and closing device of the embodiment. FIG. 4 is a cross-sectional view showing a transition from an unlocked state to a locked state of the drive mechanism of the railway vehicle door opening and closing device of the embodiment. FIG. 2 is a cross-sectional view showing a locked state of the drive mechanism of the railway vehicle door opening and closing device of the embodiment. FIG.

First Embodiment
A first embodiment of a railway vehicle door opening and closing device will be described below with reference to Figures 1 to 6. The railway vehicle door opening and closing device is a device for opening and closing doors provided on a railway vehicle.

As shown in Figures 1 and 2, a first door 1 and a second door 2 that open in both directions are provided on the side of the body of a railway vehicle. When opening and closing, the first door 1 and the second door 2 move in the front-to-rear direction of the railway vehicle and also move in the width direction of the body of the railway vehicle. In other words, when fully open, the first door 1 and the second door 2 are plug doors that protrude from the opening of the car body where the first door 1 and the second door 2 are provided to the outside of the car body and are located on the outside of the car body. The railway vehicle door opening and closing device 10 is provided inside the car body, above the opening.

(Railway vehicle door opening/closing device 10)
The railway vehicle door opening/closing device 10 includes a fixed base 11, two rail bases 12, and a slide base 13. The fixed base 11 is a member extending in the front-rear direction of the car body and is fixed to the car body. The rail bases 12 are members extending in the width direction of the car body and are provided at both ends of the lower part of the fixed base 11. The slide base 13 is a member extending in the front-rear direction of the car body and is supported by the two rail bases 12 so as to be movable in the front-rear direction of the car body. A first door hanger 24 and a second door hanger 25 are provided on the slide base 13 so as to be movable in the front-rear direction of the car body. The first door hanger 24 supports the first door 1. The second door hanger 25 supports the second door 2.

The railway vehicle door opening and closing device 10 includes a guide rail 26 and a connecting member 27. The guide rail 26 extends in the front-rear direction of the car body, with one end curved inwardly toward the car body. The connecting member 27 is supported by the slide base 13 so as to be movable in the front-rear direction of the car body. A guide roller 28 that fits into the guide rail 26 is attached to the connecting member 27. The guide roller 28 moves along the guide rail 26. Thus, the connecting member 27 moves along the guide rail 26 together with the guide roller 28.

As shown in FIG. 3, the railway vehicle door opening and closing device 10 includes a motor 20 (see FIG. 1), a transmission mechanism 30, and a locking mechanism 40. The motor 20, the transmission mechanism 30, and the locking mechanism 40 are provided on the slide base 13 and are provided on the upper part of the first door 1. The motor 20 includes a reduction gear 20A and drives the first door 1 and the second door 2 to open and close. The motor 20 is connected to the transmission mechanism 30 via the reduction gear 20A. The transmission mechanism 30 is connected to the locking mechanism 40. The transmission mechanism 30 includes a first boss 31, a second boss 32, and a shaft 33. The first boss 31 is a cylindrical member and is connected at the output of the reduction gear 20A. The second boss 32 is a cylindrical member and fits around the outer periphery of the first boss 31. The outer periphery of the first boss 31 and the inner periphery of the second boss 32 are fitted with an axial groove and a steel ball, forming a structure that transmits torque and guides the axial movement of the second boss 32. When the first boss 31 rotates, the second boss 32 rotates while moving axially. The second boss 32 converts the rotational motion of the motor 20 into linear motion in the thickness direction of the first door 1. A shaft 33 is integrally provided on the central axis inside the second boss 32. The transmission mechanism 30 also includes the configuration of the lock mechanism 40.

A part of the drive pulley 21 is fitted inside the second boss 32. The drive pulley 21 is a cylindrical member and is provided on the slide base 13. The shaft 33 passes through the center of rotation of the drive pulley 21. The inner peripheral surface of the second boss 32 is provided with a female thread. The outer peripheral surface of the part of the drive pulley 21 that is inserted into the second boss 32 is provided with a male thread. The second boss 32 and the drive pulley 21 are connected by a screw. The first boss 31 functions as a rotating part that transmits the rotational motion of the motor 20 to the drive pulley 21. The second boss 32 functions as a converting part that converts the rotational motion into linear motion.

A driven pulley 22 is provided on the opposite side of the position where the drive pulley 21 is provided in the front-rear direction of the slide base 13 (see Figures 1 and 2). An endless drive belt 23 is hung between the drive pulley 21 and the driven pulley 22. A first door hanger 24, a second door hanger 25, and a connecting member 27 are connected to the drive belt 23. The first door hanger 24 and the connecting member 27 are connected to the belt on the upper side of the drive belt 23. The second door hanger 25 is connected to the belt on the lower side of the drive belt 23. Therefore, the first door hanger 24 and the connecting member 27 and the second door hanger 25 move in opposite directions.

The lock mechanism 40 includes a lock member 29, a lock piston 41, a first spring 42, a second spring 43, and a lock plate 44. The lock piston 41 is disposed in the accommodation chamber 13A of the slide base 13 and protrudes from the slide base 13. The lock piston 41 is provided at the tip of the shaft 33 so as to be movable in the axial direction. The first spring 42 is provided on the outer periphery of the lock piston 41 and biases the lock piston 41 in a direction away from the shaft 33. The second spring 43 is provided on the outer periphery of the lock piston 41 and biases the lock piston 41 in a direction approaching the shaft 33. The first spring 42 and the second spring 43 bias with approximately the same force.

As shown in Figures 1 and 2, a locking member 29 is fixed to the top of the second door 2 near the door tip. The locking member 29 is a plate-shaped member that extends to the top of the first door 1. The locking member 29 moves together with the second door 2.

3, the lock plate 44 is fixed to the tip of the lock member 29. An engagement hole 44A is provided on the surface of the lock plate 44 facing the slide base 13. When the lock piston 41 is inserted into the engagement hole 44A, the second door 2 is fixed in the fully closed position and cannot move. Thus, the second door 2 is locked. A slope 44B with which the lock piston 41 comes into contact is provided on the tip of the lock plate 44. The lock piston 41 is guided to the engagement hole 44A by the slope 44B as the lock member 29, which moves together with the second door 2, moves. The lock piston 41 functions as an engagement portion that engages with the engagement hole 44A. The engagement hole 44A functions as an engaged portion and a recessed portion with which the engagement portion engages. The lock plate 44 functions as an engaged portion. The slope 44B functions as a guide portion that guides the lock piston 41 to the engagement hole 44A. The first spring 42 biases the lock piston 41 toward the lock plate 44. The first spring 42 is compressed when the lock piston 41 comes into contact with the inclined surface 44B.

(Action)
Next, the operation of the railway vehicle door opening and closing device 10 will be described with reference to FIGS.
As shown in Figure 3, when the railway vehicle door opening and closing device 10 is in the unlocked state, the second boss 32 moves toward the first boss 31, and the lock piston 41 moves away from the engagement hole 44A of the lock plate 44 and does not engage with the engagement hole 44A.

The operation of the railway vehicle door opening and closing device 10 to change from the unlocked state to the locked state will be described.
As shown in Fig. 4, when the motor 20 rotates in the closing direction, the output shaft of the reduction gear 20A rotates in the closing direction, and the second boss 32 rotates in the closing direction via the first boss 31. The second boss 32 moves axially toward the outside of the vehicle while being guided by the first boss 31 by a screw. When the second boss 32 comes into contact with the driving pulley 21 and stops moving in the axial direction, the second boss 32 and the driving pulley 21 rotate together to perform the closing operation. At this time, the lock piston 41 is pushed by the shaft 33 and protrudes from the slide base 13. When the lock plate 44 provided on the lock member 29 that moves together with the second door 2 approaches the fully closed position, the lock piston 41 comes into contact with the inclined surface 44B of the lock plate 44.

Next, as shown in FIG. 5, when the lock plate 44 attached to the lock member 29 that moves with the second door 2 approaches the fully closed position, the lock piston 41 continues the closing operation while being pushed back toward the inside of the vehicle. Then, the lock piston 41 rides up the slope 44B of the lock plate 44.

As shown in FIG. 6, the lock piston 41 engages with the engagement hole 44A of the lock plate 44 when the second door 2 is fully closed, thereby locking the second door 2. In the locked state, the drive pulley 21 cannot rotate in the closing direction. When the second door 2 is locked, the first door 1 cannot move either.

The operation of the railway vehicle door opening and closing device 10 to change from a locked state to an unlocked state will be described.
As shown in Fig. 3, when the motor 20 rotates in the opening direction, the output shaft of the reduction gear 20A rotates in the opening direction, and the second boss 32 rotates in the opening direction via the first boss 31. The second boss 32 moves axially toward the inside of the vehicle while being guided by the first boss 31 by the screw. When the shaft 33 moves toward the inside of the vehicle together with the second boss 32, the lock piston 41 moves toward the inside of the vehicle by the second spring 43, and the lock piston 41 is disengaged from the engagement hole 44A. Thus, the second door 2 is unlocked. In the unlocked state, the drive pulley 21 rotates integrally with the second boss 32 to perform the opening operation.

As described above, the first door 1 and the second door 2 are locked by the lock piston 41 engaging with the engagement hole 44A due to the closing drive for closing the first door 1 and the second door 2. The first door 1 and the second door 2 are unlocked by the lock piston 41 disengaging from the engagement hole 44A due to the opening drive for opening the first door 1 and the second door 2.

Next, the effects of the first embodiment will be described.
(1-1) The first boss 31 transmits the rotational motion of the motor 20 to the drive pulley 21, and the second boss 32 converts the rotational motion of the motor 20 into linear motion. Then, the lock piston 41 engages with the lock plate 44 provided on the lock member 29 that moves together with the second door 2 by the linear motion in the thickness direction of the first door 1. Therefore, since the lock piston 41 is driven by the motor 20 that drives the drive pulley 21, there is no need for a separate drive device to drive the lock device that fixes the first door 1 and the second door 2. This makes it possible to reduce the number of parts.

(1-2) As the second door 2 moves, the lock piston 41 is engaged with the engagement hole 44A of the lock plate 44 by the slope 44B of the lock plate 44. Therefore, even if the lock piston 41 comes into contact with the lock plate 44 before the second door 2 reaches the fully closed position, the lock piston 41 is guided by the slope 44B as the second door 2 moves, and the lock piston 41 can be engaged with the engagement hole 44A of the lock plate 44.

(1-3) A first spring 42 is provided to bias the lock piston 41 toward the inclined surface 44B. Therefore, when the lock piston 41 comes into contact with the inclined surface 44B, the displacement of the lock piston 41 caused by the inclined surface 44B can be absorbed by the first spring 42.

Second Embodiment
A second embodiment of the railway vehicle door opening and closing device will be described below with reference to Figures 7 to 10. The railway vehicle door opening and closing device of this embodiment differs from the first embodiment in the configuration of the lock piston and the lock plate. The following description will focus on the differences from the first embodiment.

(Railway vehicle door opening/closing device 10)
As shown in FIG. 7, a rotation lock plate 45 is provided at the tip of the lock member 29 instead of the lock plate 44 of the first embodiment. The rotation lock plate 45 rotates around a rotation shaft 46 relative to the lock member 29. A torsion spring 45C is provided on the rotation shaft 46. The rotation lock plate 45 is biased in a direction approaching the slide base 13 by the torsion spring 45C. An engagement hole 45A is provided on the surface of the rotation lock plate 45 on the slide base 13 side. The shaft 33 penetrates the through hole 13B of the slide base 13 and protrudes from the slide base 13. When the shaft 33 is inserted into the engagement hole 45A, the second door 2 is fixed in the fully closed position and cannot move. Thus, the second door 2 is locked. A slope 45B with which the shaft 33 comes into contact is provided at the tip of the rotation lock plate 45. The lock piston 41 is guided to the engagement hole 45A by the slope 45B as the lock member 29, which moves together with the second door 2, moves. The rotation lock plate 45 rotates when the shaft 33 comes into contact with the inclined surface 45B. The shaft 33 functions as an engaging portion that engages with the engaging hole 45A. The engaging hole 45A functions as an engaged portion with which the engaging portion engages. The rotation lock plate 45 functions as a fixed portion. The inclined surface 45B functions as a guiding portion that guides the shaft 33 to the engaging hole 45A. The lock piston 41, the first spring 42, and the second spring 43 are not provided. The rotation shaft 46 corresponds to a displacement portion.

(Action)
Next, the operation of the railway vehicle door opening and closing device 10 will be described with reference to FIGS.

As shown in FIG. 7, when the railway vehicle door opening/closing device 10 is in the unlocked state, the second boss 32 moves toward the first boss 31, and the shaft 33 moves away from the engagement hole 45A of the rotary lock plate 45 and does not engage with the engagement hole 45A.

The operation of the railway vehicle door opening and closing device 10 to change from the unlocked state to the locked state will be described.
As shown in Fig. 8, when the motor 20 rotates in the closing direction, the output shaft of the reduction gear 20A rotates in the closing direction, and the second boss 32 rotates in the closing direction via the first boss 31. The second boss 32 moves axially toward the outside of the vehicle while being guided by the first boss 31 by a screw. When the second boss 32 comes into contact with the drive pulley 21 and stops moving in the axial direction, the second boss 32 and the drive pulley 21 rotate together to perform the closing operation. At this time, the shaft 33 is in a state of protruding from the slide base 13. When the rotation lock plate 45 provided on the lock member 29 that moves together with the second door 2 approaches the fully closed position, the shaft 33 comes into contact with the inclined surface 45B of the lock plate 44.

Next, as shown in FIG. 9, when the rotation lock plate 45 provided on the lock member 29 that moves with the second door 2 approaches the fully closed position, the rotation lock plate 45 rotates clockwise to continue the closing operation. Then, the shaft 33 rides up the slope 45B of the rotation lock plate 45.

Next, as shown in FIG. 10, when the second door 2 is fully closed, the rotary lock plate 45 returns to its original position and the shaft 33 engages with the engagement hole 45A of the rotary lock plate 45, thereby locking the second door 2. In the locked state, the drive pulley 21 cannot rotate in the closing direction. When the second door 2 is locked, the first door 1 cannot move either.

The operation of the railway vehicle door opening and closing device 10 to change from a locked state to an unlocked state will be described.
As shown in Fig. 7, when the motor 20 rotates in the opening direction, the output shaft of the reduction gear 20A rotates in the opening direction, and the second boss 32 rotates in the opening direction via the first boss 31. The second boss 32 moves axially toward the inside of the vehicle while being guided by the first boss 31 by the screw. When the shaft 33 moves toward the inside of the vehicle together with the second boss 32, the shaft 33 is disengaged from the engagement hole 45A. Thus, the second door 2 is unlocked. In the unlocked state, the drive pulley 21 rotates integrally with the second boss 32 to perform the opening operation.

As described above, the shaft 33 engages with the engagement hole 45A by the closing drive for closing the first door 1 and the second door 2, thereby locking the first door 1 and the second door 2. Also, the shaft 33 disengages from the engagement hole 45A by the opening drive for opening the first door 1 and the second door 2, thereby unlocking the first door 1 and the second door 2.

Next, the effects of the second embodiment will be described.
(2-1) The first boss 31 transmits the rotational motion of the motor 20 to the drive pulley 21, and the second boss 32 converts the rotational motion of the motor 20 into linear motion. Then, the linear motion in the thickness direction of the first door 1 causes the shaft 33 to engage with the rotary lock plate 45 provided on the lock member 29 that moves together with the second door 2. For this reason, since the shaft 33 is driven by the motor 20 that drives the drive pulley 21, there is no need for a separate drive device for driving the lock device that fixes the first door 1 and the second door 2. This makes it possible to reduce the number of parts.

(2-2) As the locking member 29 moves together with the second door 2, the inclined surface 45B of the rotation lock plate 45 causes the shaft 33 to engage with the engagement hole 45A of the rotation lock plate 45. Therefore, even if the shaft 33 comes into contact with the rotation lock plate 45 before the second door 2 reaches the fully closed position, the movement of the second door 2 guides the shaft 33 to the inclined surface 45B, allowing the shaft 33 to engage with the engagement hole 45A of the rotation lock plate 45.

(2-3) When the shaft 33 comes into contact with the inclined surface 45B, the rotation lock plate 45 rotates. Therefore, when the shaft 33 comes into contact with the inclined surface 45B, the rotation lock plate 45 can be allowed to move.

(2-4) The rotation lock plate 45 is equipped with a torsion spring 45C that biases the rotation lock plate 45 toward the shaft 33. Therefore, after the shaft 33 comes into contact with the inclined surface 45B, the rotation lock plate 45 can be rotated back toward the shaft 33.

(2-5) The first boss 31 is provided on the top of the first door 1, and the lock plate 44 is provided on the second door 2 and extends to the top of the first door 1. Therefore, when the first door 1 is fully closed to be locked, the first door 1 and the second door 2 approach each other, so that the lock piston 41 of the first boss 31 and the lock plate 44 approach each other and can be engaged.

Other Embodiments
The above-described embodiments may be modified as follows: The above-described embodiments and the following modifications may be combined with each other to the extent that no technical contradiction occurs.

- In each of the above embodiments, the second door 2 is provided with a locking member 29 to lock the second door 2. However, a locking member may be provided on the first door 1, and the transmission mechanism and locking mechanism may be arranged to engage with this locking member.

In each of the above-described embodiments, the inclined surface 44B and the inclined surface 45B may be omitted.
In the first embodiment, the first spring 42 and the second spring 43 may be omitted.
In the second embodiment, the torsion spring 45C may be omitted.

- In the second embodiment described above, the rotation lock plate 45 rotates on the rotation shaft 46 relative to the lock member 29. However, as long as the lock plate can be displaced relative to the lock member 29 and the shaft 33 can be guided into the engagement hole 45A, it does not have to rotate.

In each of the above embodiments, the lock piston 41 engages with the engagement hole 44A, and the shaft 33 engages with the engagement hole 45A. However, as long as it is possible to restrict the movement of the lock piston 41 or the shaft 33 in the fore-aft direction of the vehicle body, it does not have to be an engagement hole, and any shape or member that engages with the lock piston 41 or the shaft 33 will suffice.

- In each of the above embodiments, the door is a plug door that is located on the outside of the vehicle body when fully open and displaces from the outside of the vehicle body to the opening when the door is closed. However, the door may be a plug door that is located on the inside of the vehicle body when fully open and displaces from the inside of the vehicle body to the opening when the door is closed. In this case, the door is pushed in the thickness direction of the door by the conversion part, so that the door is pressed against the vehicle body when fully closed, thereby improving the airtightness of the vehicle body.

- In each of the above embodiments, a plug door is used that performs a plug operation. However, if the door opening and closing device for a railroad vehicle is a belt-driven type, a sliding door that does not perform a plug operation may be used. Also, a single door may be used instead of a double door.

- In each of the above embodiments, if something is made up of multiple objects, the multiple objects may be integrated, and conversely, if something is made up of a single object, it may be divided into multiple objects. Regardless of whether they are integrated or not, it is sufficient that the object of the invention can be achieved.

REFERENCE SIGNS LIST 1...first door 2...second door 10...railway vehicle door opening/closing device 11...fixed base 12...rail base 13...slide base 13A...accommodation chamber 13B...through hole 20...motor 20A...reduction gear 21...driving pulley 22...driven pulley 23...driving belt 24...first hanger 25...second hanger 26...guide rail 27...connecting member 28...guide roller 29...locking member 30...transmission mechanism 31...first boss as conversion part 32...second boss as rotating part 33...shaft as engaging part 40...locking mechanism 41...lock piston as engaging part 42...first spring 43...second spring 44...lock plate as engaged part 44A...engagement hole as recess 44B...inclined surface as guiding part 45...rotating lock plate as engaged part 45A...engagement hole 45B...inclined surface as guiding part 45C: Torsion spring 46: Rotating shaft as a displacement portion

Claims (8)

A motor that drives a door provided in a railway vehicle to open and close;
A rotating part that transmits the rotational motion of the motor to a pulley that drives the door;
A conversion part that engages with the rotation part and converts the rotational motion into a linear motion in the thickness direction of the door;
an engaged portion provided on the door and configured to engage with the conversion portion to lock the door when the door is in a fully closed position. The railway vehicle door opening and closing device according to claim 1 , wherein the engaged portion comprises a recess that engages with the conversion portion, and a guide portion that guides the conversion portion into the recess. The railway vehicle door opening and closing device according to claim 2 , wherein the conversion portion includes an engaging portion that engages with the engaged portion, and a spring that urges the engaging portion toward the engaged portion. The railway vehicle door opening and closing device according to claim 3 , wherein the engagement portion passes through a rotation center of the pulley. The engaged portion includes a displacement portion that is displaceable relative to the door,
The railway vehicle door opening and closing device according to claim 2 , wherein the engaged portion is displaced by the displacement portion when the conversion portion comes into contact with the guide portion. The railway vehicle door opening and closing device according to claim 5 , wherein the engaged portion includes a spring that biases the engaged portion toward the converting portion. the door is a plug door that moves in a width direction of the door and in a thickness direction of the door, and is located inside a body of the railway vehicle when fully open;
The railway vehicle door opening and closing device according to claim 1 , wherein the conversion portion presses the door in a thickness direction of the door. The door includes a first door and a second door that open from both sides,
the motor, the pulley, the rotating unit, and the converting unit are provided on an upper portion of the first door,
The railway vehicle door opening and closing device according to any one of claims 1 to 7, wherein the engaged portion is provided on an upper portion of the second door and extends to an upper portion of the first door.

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