Door opening and closing device for railway vehicles

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

Technical Field

[0001] The present invention relates to a door opening and closing device for railway vehicles.

Background Art

[0002] In the door opening and closing device for railway vehicles described in Patent Document 1, it includes a driving device that drives a sliding door, a driving mechanism that transmits the driving force of the driving device to the sliding door, and a locking mechanism that locks the sliding door in the closed position. The locking mechanism has a locked member attached to the sliding door and a locking member attached to the vehicle body that can be displaced between a locking position for locking the locked member and an unlocking position for not locking the locked member. The opening and closing device includes detection means for detecting the driving amount of the driving mechanism and control means for displacing the locking member to the locking position when it recognizes that the sliding door is in the closed position from the driving amount of the driving mechanism.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the locking mechanism of the door for railway vehicles described in Patent Document 1 includes an actuator that drives the locking member separately from the driving device that drives the sliding door, in addition to the detection means for detecting the driving amount of the driving mechanism. Therefore, there is a demand for a locking device that reduces the number of parts and lowers the cost.

Means for Solving the Problems

[0005] A door opening and closing device for a railway vehicle that solves the above problems comprises: a motor that drives the opening and closing of a door provided on a 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 provided on the door that locks the door by engaging with the conversion part when the door is in the fully closed position.

[0006] According to the above configuration, the rotational motion of the motor is transmitted to the pulley by the rotating part, and the rotational motion of the motor is converted into linear motion by the conversion part, which then engages with the engaged part provided on the door by linear motion in the thickness direction of the door. Therefore, since the conversion part is driven by the motor that drives the pulley, a separate drive device is not required to drive the locking device that fixes the door. Thus, the number of parts can be reduced.

[0007] In the above-described door opening and closing device for railway vehicles, it is preferable that the engaged portion comprises a recess that engages with the conversion portion and a guide portion that guides the conversion portion into the recess. In the above-mentioned door opening and closing device for railway vehicles, it is preferable that the conversion unit comprises an engaging portion that engages with the engaged portion, and a spring that biases the engaging portion toward the engaged portion.

[0008] Regarding the above-mentioned door opening and closing device for railway vehicles, it is preferable that the engaging portion penetrates the rotation center of the pulley. In the above-described door opening and closing device for railway vehicles, the engaged portion preferably 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 comes into contact with the guide portion.

[0009] Regarding the above-described door opening and closing device for railway vehicles, it is preferable that the engaged portion is equipped with a spring that biases the engaged portion toward the conversion portion. Regarding the above-described door opening and closing device for railway vehicles, the door is a plug door that moves in the width direction of the door and also moves in the thickness direction of the door, and is located inside the body of the railway vehicle when fully open, and the conversion part preferably presses the door in the thickness direction of the door.

[0010] In the above-described door opening and closing device for railway vehicles, the door comprises a double-opening first door and a second door, the motor, the pulley, the rotating part, and the conversion part are provided on the upper part of the first door, and the engaged part is provided on the upper part of the second door and preferably extends to the upper part of the first door. [Effects of the Invention]

[0011] According to the present invention, the number of parts can be reduced. [Brief explanation of the drawing]

[0012] [Figure 1] This is a front view showing the schematic configuration of a door opening and closing device for railway vehicles. [Figure 2] This is a plan view showing the schematic configuration of a door opening and closing device for railway vehicles. [Figure 3] This is a cross-sectional view showing the unlocked state of the drive mechanism of the door opening and closing device for a railway vehicle according to the first embodiment. [Figure 4] This is a cross-sectional view showing the transition from the unlocked state to the locked state of the drive mechanism of the door opening and closing device for a railway vehicle according to the same embodiment. [Figure 5] This is a cross-sectional view showing the transition from the unlocked state to the locked state of the drive mechanism of the door opening and closing device for a railway vehicle according to the same embodiment. [Figure 6] This is a cross-sectional view showing the locked state of the drive mechanism of the door opening and closing device for a railway vehicle according to the same embodiment. [Figure 7] This is a cross-sectional view showing the unlocked state of the drive mechanism of the door opening and closing device for a railway vehicle according to the second embodiment. [Figure 8] This is a cross-sectional view showing the transition from the unlocked state to the locked state of the drive mechanism of the door opening and closing device for a railway vehicle according to the same embodiment. [Figure 9]It is a cross-sectional view showing the transition of the drive mechanism of the door opening / closing device for railway vehicles from the unlocked state to the locked state in the same embodiment. [Figure 10] It is a cross-sectional view showing the locked state of the drive mechanism of the door opening / closing device for railway vehicles in the same embodiment.

Mode for Carrying Out the Invention

[0013] (First Embodiment) Hereinafter, a first embodiment of a door opening / closing device for railway vehicles will be described with reference to FIGS. 1 to 6. The door opening / closing device for railway vehicles is a device for opening and closing a door provided on a railway vehicle.

[0014] As shown in FIGS. 1 and 2, double-opening first door 1 and second door 2 are provided on the side surface of the vehicle body of the railway vehicle. When the first door 1 and the second door 2 are opened and closed, they move in the front-rear direction of the railway vehicle and also move in the width direction of the vehicle body of the railway vehicle. That is, when fully opened, the first door 1 and the second door 2 protrude outside the vehicle body from the opening of the vehicle body where the first door 1 and the second door 2 are provided, and are plug doors located outside the vehicle body. The door opening / closing device 10 for railway vehicles is provided inside the vehicle body and at the upper part of the opening.

[0015] (Door Opening / Closing Device 10 for Railway Vehicles) The door opening / closing device 10 for railway vehicles 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 vehicle body and is fixed to the vehicle body. The rail base 12 is a member extending in the width direction of the vehicle body and is provided at both ends of the lower part of the fixed base 11, respectively. The slide base 13 is a member extending in the front-rear direction of the vehicle body and is supported by the two rail bases 12 so as to be movable in the front-rear direction of the vehicle 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 vehicle body. The first door hanger 24 supports the first door 1. The second door hanger 25 supports the second door 2.

[0016] The door opening and closing device 10 for railway vehicles includes a guide rail 26 and a connecting member 27. The guide rail 26 extends in the longitudinal direction of the vehicle body, and one end thereof is curved inward of the vehicle body. The connecting member 27 is supported by a slide base 13 so as to be movable in the longitudinal direction of the vehicle 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. Therefore, the connecting member 27 moves along the guide rail 26 together with the guide roller 28.

[0017] As shown in FIG. 3, the door opening and closing device 10 for railway vehicles includes a motor 20 (see FIG. 1), a transmission mechanism 30, and a lock mechanism 40. The motor 20, the transmission mechanism 30, and the lock mechanism 40 are provided on the slide base 13 and on the upper part of the first door 1. The motor 20 includes a speed reducer 20A and drives the opening and closing of the first door 1 and the second door 2. The motor 20 is connected to the transmission mechanism 30 via the speed reducer 20A. The transmission mechanism 30 is connected to the lock 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 speed reducer 20A. The second boss 32 is a cylindrical member and fits on 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 by an axial groove and steel balls, and are structured to guide torque transmission and the axial movement of the second boss 32. When the first boss 31 rotates, the second boss 32 rotates while moving axially. The rotational movement of the motor 20 is converted into a linear movement in the thickness direction of the first door 1 by the second boss 32. A shaft 33 is integrally provided on the central axis inside the second boss 32. Note that the transmission mechanism 30 also includes the configuration of the lock mechanism 40.

[0018] A portion 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 rotation center of the drive pulley 21. The inner circumferential surface of the second boss 32 is provided with female threads. The outer circumferential surface of the portion of the drive pulley 21 that is inserted into the second boss 32 is provided with male threads. The second boss 32 and the drive pulley 21 are connected by screws. 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 conversion part that converts rotational motion into linear motion.

[0019] On the slide base 13, opposite to the position where the drive pulley 21 is located in the front-rear direction, a driven pulley 22 is provided (see Figures 1 and 2). An endless drive belt 23 is stretched over 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 upper side of the drive belt 23. The second door hanger 25 is connected to 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.

[0020] The locking mechanism 40 comprises a locking member 29, a locking piston 41, a first spring 42, a second spring 43, and a locking plate 44. The locking piston 41 is positioned in the housing chamber 13A of the slide base 13 and protrudes from the slide base 13. The locking piston 41 is mounted at the tip of the shaft 33 so as to be axially movable. The first spring 42 is provided on the outer circumference of the locking piston 41 and biases the locking piston 41 away from the shaft 33. The second spring 43 is provided on the outer circumference of the locking piston 41 and biases the locking piston 41 towards the shaft 33. The first spring 42 and the second spring 43 exert approximately the same biasing force.

[0021] As shown in Figures 1 and 2, a locking member 29 is fixed to the upper edge of the second door 2. The locking member 29 is a plate-shaped member that extends from the upper part of the first door 1. The locking member 29 moves integrally with the second door 2.

[0022] As shown in Figure 3, the lock plate 44 is fixed to the tip of the locking member 29. An engagement hole 44A is provided on the side 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. An inclined surface 44B is provided at the tip of the lock plate 44, which the lock piston 41 contacts. The lock piston 41 is guided to the engagement hole 44A by the inclined surface 44B as the locking member 29 moves together with the second door 2. The lock piston 41 functions as an engaging part that engages with the engagement hole 44A. The engagement hole 44A functions as an engaged part and a recess into which the engaging part engages. The lock plate 44 functions as an engaged part. The inclined surface 44B functions as a guide part 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.

[0023] (action) Next, the operation of the railway vehicle door opening and closing device 10 will be explained with reference to Figures 3 to 6. As shown in Figure 3, in the unlocked state of the railway vehicle door opening and closing device 10, the second boss 32 has moved toward the first boss 31, and the lock piston 41 has moved away from the engagement hole 44A of the lock plate 44 and is not engaged with the engagement hole 44A.

[0024] This section describes the operation of the railway vehicle door opening and closing device 10 from the unlocked state to the locked state. As shown in Figure 4, when the motor 20 rotates in the closing direction, the output shaft of the reduction gear 20A rotates in the closing direction, causing the second boss 32 to rotate in the closing direction via the first boss 31. The second boss 32 moves axially outward from the vehicle, guided by the first boss 31 by a screw. When the second boss 32 contacts the drive pulley 21 and its axial movement stops, the second boss 32 and the drive 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 with the second door 2 approaches the fully closed position, the lock piston 41 contacts the inclined surface 44B of the lock plate 44.

[0025] Next, as shown in Figure 5, as the lock plate 44 provided on the locking member 29, which moves together with the second door 2, approaches the fully closed position, the lock piston 41 continues the closing operation while being pushed back toward the interior of the vehicle. The lock piston 41 then rides up onto the inclined surface 44B of the lock plate 44.

[0026] Next, as shown in Figure 6, the lock piston 41 locks the second door 2 by engaging with the engagement hole 44A of the lock plate 44 when fully closed. 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 also becomes immobile.

[0027] This section describes the operation of the railway vehicle door opening and closing device 10 from the locked state to the unlocked state. As shown in Figure 3, when the motor 20 rotates in the opening direction, the output shaft of the reduction gear 20A rotates in the opening direction, causing the second boss 32 to rotate in the opening direction via the first boss 31. The second boss 32 moves axially inward towards the vehicle interior, guided by the first boss 31 by a screw. As the shaft 33 moves inward towards the vehicle interior along with the second boss 32, the lock piston 41 moves inward towards the vehicle interior by the second spring 43, and the lock piston 41 disengages from the engagement hole 44A. Thus, the second door 2 is unlocked. In the unlocked state, the drive pulley 21 rotates together with the second boss 32 to perform the opening operation.

[0028] As described above, the lock piston 41 engages with the engagement hole 44A when the first door 1 and second door 2 are closed by the closing drive, thereby locking the first door 1 and second door 2. Conversely, the lock piston 41 disengages from the engagement hole 44A when the first door 1 and second door 2 are opened by the opening drive, thereby unlocking the first door 1 and second door 2.

[0029] 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 linear motion of the first door 1 in the thickness direction causes the lock piston 41 to engage with the lock plate 44 provided on the lock member 29, which moves together with the second door 2. For this reason, since the lock piston 41 is driven by the motor 20 that drives the drive pulley 21, a separate drive device is not required to drive the locking device that fixes the first door 1 and the second door 2. Thus, the number of parts can be reduced.

[0030] (1-2) As the second door 2 moves, the inclined surface 44B of the lock plate 44 engages the lock piston 41 with the engagement hole 44A 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 movement of the second door 2 guides the lock piston 41 to the inclined surface 44B, allowing the lock piston 41 to engage with the engagement hole 44A of the lock plate 44.

[0031] (1-3) The device is equipped with a first spring 42 that biases 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 due to the inclined surface 44B can be absorbed by the first spring 42.

[0032] (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 configuration of the lock piston and lock plate in this embodiment of the railway vehicle door opening and closing device differs from that of the first embodiment. The following description will focus on the differences from the first embodiment.

[0033] (Railway vehicle door opening and closing device 10) As shown in Figure 7, a rotating lock plate 45 is provided at the tip of the locking member 29 in place of the locking plate 44 of the first embodiment. The rotating lock plate 45 rotates around a rotation axis 46 relative to the locking member 29. A torsion spring 45C is provided on the rotation axis 46. The rotating lock plate 45 is biased by the torsion spring 45C in the direction toward the slide base 13. An engagement hole 45A is provided on the surface of the rotating lock plate 45 that faces the slide base 13. The shaft 33 passes through a through hole 13B in 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. An inclined surface 45B is provided at the tip of the rotating lock plate 45, which the shaft 33 contacts. The lock piston 41 is guided to the engagement hole 45A by the inclined surface 45B as the lock member 29 moves together with the second door 2. The rotating lock plate 45 rotates when the shaft 33 comes into contact with the inclined surface 45B. The shaft 33 functions as an engaging part that engages with the engagement hole 45A. The engagement hole 45A functions as an engaged part that the engaging part engages with. The rotating lock plate 45 functions as a fixed part. The inclined surface 45B functions as a guide part that guides the shaft 33 to the engagement hole 45A. The lock piston 41, the first spring 42, and the second spring 43 are not provided. The rotating shaft 46 corresponds to the displacement part.

[0034] (action) Next, the operation of the railway vehicle door opening and closing device 10 will be explained with reference to Figures 7 to 10.

[0035] As shown in Figure 7, in the unlocked state of the railway vehicle door opening and closing device 10, the second boss 32 has moved toward the first boss 31, and the shaft 33 has moved away from the engagement hole 45A of the rotating lock plate 45 and is not engaged with the engagement hole 45A.

[0036] This section describes the operation of the railway vehicle door opening and closing device 10 from the unlocked state to the locked state. As shown in Figure 8, when the motor 20 rotates in the closing direction, the output shaft of the reduction gear 20A rotates in the closing direction, causing the second boss 32 to rotate in the closing direction via the first boss 31. The second boss 32 moves axially outward from the vehicle, guided by the first boss 31 by a screw. When the second boss 32 contacts the drive pulley 21 and its axial movement stops, the second boss 32 and the drive pulley 21 rotate together to perform the closing operation. At this time, the shaft 33 protrudes from the slide base 13. As the rotating lock plate 45 provided on the lock member 29, which moves with the second door 2, approaches the fully closed position, the shaft 33 contacts the inclined surface 45B of the lock plate 44.

[0037] Next, as shown in Figure 9, when the rotating lock plate 45, which is provided on the locking member 29 that moves together with the second door 2, approaches the fully closed position, the rotating lock plate 45 rotates clockwise to continue the closing operation. Then, the shaft 33 rides up onto the inclined surface 45B of the rotating lock plate 45.

[0038] Next, as shown in Figure 10, when fully closed, the rotation lock plate 45 returns to its original position, and the shaft 33 engages with the engagement hole 45A of the rotation 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 also becomes immobile.

[0039] This section describes the operation of the railway vehicle door opening and closing device 10 from the locked state to the unlocked state. As shown in Figure 7, when the motor 20 rotates in the opening direction, the output shaft of the reduction gear 20A rotates in the opening direction, causing the second boss 32 to rotate in the opening direction via the first boss 31. The second boss 32 moves axially inward towards the vehicle interior, guided by the first boss 31 by a screw. As the shaft 33 moves inward towards the vehicle interior along with the second boss 32, the shaft 33 disengages from the engagement hole 45A. Thus, the second door 2 is unlocked. In the unlocked state, the drive pulley 21 rotates together with the second boss 32 to perform the opening operation.

[0040] As described above, the closing drive, which is used to close the first door 1 and the second door 2, causes the shaft 33 to engage with the engagement hole 45A, thereby locking the first door 1 and the second door 2. Conversely, the opening drive, which is used to open the first door 1 and the second door 2, causes the shaft 33 to disengage from the engagement hole 45A, thereby unlocking the first door 1 and the second door 2.

[0041] 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 of the first door 1 in the thickness direction causes the shaft 33 to engage with the rotating lock plate 45 provided on the lock member 29, which 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, a separate drive device is not required to drive the locking device that fixes the first door 1 and the second door 2. Thus, the number of parts can be reduced.

[0042] (2-2) As the locking member 29 moves along with the second door 2, the shaft 33 is engaged with the engagement hole 45A of the rotating lock plate 45 by the inclined surface 45B of the rotating lock plate 45. Therefore, even if the shaft 33 comes into contact with the rotating 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 rotating lock plate 45.

[0043] (2-3) When the shaft 33 comes into contact with the inclined surface 45B, the rotation lock plate 45 rotates. Therefore, movement of the rotation lock plate 45 is permitted when the shaft 33 comes into contact with the inclined surface 45B.

[0044] (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 toward the shaft 33 and returned to its original position.

[0045] (2-5) The first boss 31 is provided on the upper part of the first door 1, and the locking plate 44 is provided on the second door 2 and extends to the upper part of the first door 1. Therefore, when the first door 1 is fully closed to lock it, the first door 1 and the second door 2 come closer together, causing the locking piston 41 of the first boss 31 and the locking plate 44 to come closer together and engage.

[0046] (Other embodiments) Each of the above embodiments can be implemented with the following modifications. Each of the above embodiments and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0047] In each of the above embodiments, a locking member 29 is provided on the second door 2 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.

[0048] In each of the above embodiments, slopes 44B and 45B may be omitted. In the first embodiment described above, the first spring 42 and the second spring 43 may be omitted. In the second embodiment described above, the torsion spring 45C may be omitted.

[0049] In the second embodiment described above, the rotating lock plate 45 is made to rotate on a rotation axis 46 relative to the locking member 29. However, rotation is not required as long as the lock plate is displaced relative to the locking member 29 so that the shaft 33 can be guided into the engagement hole 45A.

[0050] In each of the above embodiments, the lock piston 41 engages with the engagement hole 44A, or the shaft 33 engages with the engagement hole 45A. However, it does not have to be an engagement hole; any shape or component that engages with the lock piston 41 or shaft 33 is acceptable as long as it can restrict the movement of the lock piston 41 or shaft 33 in the longitudinal direction of the vehicle body.

[0051] In the above embodiments, a plug door is provided in which the door is located on the outside of the vehicle body when fully open and displaced from the outside of the vehicle body to the opening when the door is closed. However, a plug door may also be provided in which the door is located on the inside of the vehicle body when fully open and displaced 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 when fully closed the door is pressed against the vehicle body, the airtightness of the vehicle body can be improved.

[0052] In the embodiments described above, plug doors that perform plugging operations were used. However, any belt-driven door opening and closing device for railway vehicles may be a sliding door that does not perform plugging operations. Also, it may be a single-leaf door instead of a double-leaf door.

[0053] In each of the above embodiments, if the structure is composed of multiple objects, those multiple objects may be integrated, and conversely, if the structure is composed of a single object, it may be divided into multiple objects. Whether or not the objects are integrated, the structure should be configured in a way that achieves the objective of the invention. [Explanation of symbols]

[0054] 1…First Door 2…Second door 10…Route changeover device for railway vehicles 11…Fixed base 12... Rail base 13…Slide base 13A... Containment Chamber 13B...Through hole 20…motor 20A…Reducer 21… Drive pulley 22... Driven pulley 23… Drive belt 24...1st Hanga 25…Second Hanga 26… Guide rail 27…Connecting member 28... Guide roller 29... Locking component 30…Transmission mechanism 31...First boss as a conversion unit 32... The second boss as a rotating part 33…Shaft as an engaging part 40… Locking mechanism 41... Locking piston as an engaging part 42...First spring 43... Second spring 44... Locking plate as the engaged part 44A...Engagement hole as a recess 44B... Slope as a guide section 45... Rotating lock plate as the engaged part 45A…Engagement hole 45B... Slope as a guide section 45C... Torsion spring 46... Rotation axis as a displacement part

Claims

1. A motor that drives the opening and closing of doors installed on railway vehicles, A rotating part that transmits the rotational motion of the motor to a pulley that drives the door, A conversion unit that engages with the rotating unit and converts the rotational motion into linear motion in the thickness direction of the door, The door includes an engaging portion which is provided on the door and locks the door by engaging with the conversion portion when the door is in the fully closed position. A door opening and closing device for railway vehicles.

2. The engaged portion comprises a recess that engages with the conversion portion and a guide portion that guides the conversion portion into the recess. A door opening and closing device for a railway vehicle according to claim 1.

3. The conversion unit comprises an engaging portion that engages with the engaged portion, and a spring that biases the engaging portion toward the engaged portion. The door opening and closing device for a railway vehicle according to claim 2.

4. The engagement portion penetrates the rotation center of the pulley. The door opening and closing device for a railway vehicle according to claim 3.

5. The engaged portion includes a displacement portion that is displaced relative to the door, The engaged portion is displaced by the displacement portion when the conversion portion comes into contact with the induction portion. The door opening and closing device for a railway vehicle according to claim 2.

6. The engaged portion is equipped with a spring that biases the engaged portion toward the conversion portion. The door opening and closing device for a railway vehicle according to claim 5.

7. The door is a plug door that moves in the width direction and the thickness direction of the door, and is located inside the body of the railway vehicle when fully open. The conversion unit presses the door in the thickness direction of the door. A door opening and closing device for a railway vehicle according to claim 1.

8. The aforementioned door comprises a first door and a second door that open in a double-leaf configuration. The motor, the pulley, the rotating part, and the conversion part are provided on the upper part of the first door. The engaged portion is provided on the upper part of the second door and extends to the upper part of the first door. A door opening and closing device for a railway vehicle according to any one of claims 1 to 7.

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