Door drive system for railway vehicles

Abstract

The space between the door hanging mechanism and the drive mechanism is utilized effectively. [Solution] The door drive device for a railway vehicle according to this embodiment comprises a drive unit for driving a door that opens and closes the entrance / exit of a railway vehicle, and a locking mechanism for locking the door from moving in the opening direction when the door is in the fully closed position, wherein the locking mechanism is provided on the side opposite to the door support portion that supports the door relative to the drive unit.

Description

[Technical Field]

[0001] This invention relates to a door drive device for railway vehicles. [Background technology]

[0002] Patent Document 1 discloses a configuration for a rack and pinion drive unit for opening and closing a door panel for a railway vehicle. On the other hand, a configuration is known that includes a locking mechanism that locks the door from moving in the opening direction when the door is in the fully closed position. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Special Publication No. 2016-538170 [Overview of the project] [Problems that the invention aims to solve]

[0004] By the way, depending on where the locking mechanism for the drive unit is installed, the space between the door hanging unit and the drive unit may become narrow. In this case, the space between the door hanging unit and the drive unit cannot be used effectively.

[0005] The present invention has been made to solve the above problems and aims to provide a door drive device for railway vehicles that can effectively utilize the space between the door hanging part and the drive part. [Means for solving the problem]

[0006] As a means of solving the above problems, an embodiment of the present invention has the following configuration. (1) A door drive device for a railway vehicle according to an aspect of the present invention comprises a drive unit for driving a door that opens and closes the entrance / exit of a railway vehicle, and a locking mechanism for locking the door from moving in the opening direction when the door is in the fully closed position, wherein the locking mechanism is provided on the side opposite to the door support portion that supports the door with respect to the drive unit.

[0007] According to this configuration, a wider space can be secured between the door suspension part and the drive part as compared with the case where the lock mechanism is provided on the door suspension part side with respect to the drive part. Therefore, the space between the door suspension part and the drive part can be effectively utilized.

[0008] (2) The door drive device for a railway vehicle according to (1) above further includes a manual unlocking mechanism for unlocking the lock mechanism by manual operation. The manual unlocking mechanism includes an operation part that is manually operated, and an unlocking part to which the operating force by the manual operation is transmitted to unlock the lock mechanism. The unlocking part may be provided on the side opposite to the door suspension part with respect to the drive part.

[0009] (3) In the door drive device for a railway vehicle according to (2) above, the unlocking part may be provided on the side opposite to the drive part with respect to the lock mechanism.

[0010] (4) The door drive device for a railway vehicle according to any one of (1) to (3) above further includes a rail extending along the opening and closing direction of the door, and a slider to which the door suspension part is connected and moves along the rail. When viewed from the vehicle width direction, the drive part may overlap at least a part of the rail.

[0011] (5) In the door drive device for a railway vehicle according to any one of (1) to (4) above, the lock mechanism may include a plurality of links, a support member that rotatably supports each of the plurality of links around an axis along the vertical direction, and a receiving member that receives at least one of the support members from below in the vertical direction. [Advantages of the Invention]

[0012] According to the present invention, the space between the door suspension part and the drive part can be effectively utilized. [Brief Description of the Drawings]

[0013] [Figure 1]This is a view of a railway vehicle equipped with the door drive device for railway vehicles according to the embodiment, as seen from the outside in the vehicle width direction. [Figure 2] This is a perspective view of the door drive device for a railway vehicle according to the embodiment, as seen from the door suspension side. [Figure 3] This is a perspective view of the door drive device for a railway vehicle according to the embodiment, viewed from the opposite side of the door suspension section. [Figure 4] This is a view of the door drive device for a railway vehicle according to the embodiment, as seen from the vehicle width direction, and corresponds to the direction of arrow IV in Figure 3. [Figure 5] A perspective view including a cross-section of the locking mechanism of the embodiment. [Figure 6] This is a perspective view of the locking mechanism of the embodiment, seen from the opposite side from the door hanging section. [Figure 7] This is a bottom view showing the unlocked state of the locking mechanism of the embodiment. [Figure 8] This is a bottom view showing the locked state of the locking mechanism of the embodiment. [Figure 9] This is a diagram illustrating the arrangement of the locking mechanism in the embodiment. [Figure 10] This diagram illustrates the arrangement of the locking mechanism in the comparative example. [Modes for carrying out the invention]

[0014] Hereinafter, an embodiment of the present invention concerning a door drive device for railway vehicles will be described with reference to the drawings. In the following description, expressions indicating relative or absolute arrangements such as "parallel," "orthogonal," "center," and "coaxial" will not only mean such arrangements strictly, but will also include states in which the components are relatively displaced with tolerances or angles and distances that allow the same function to be obtained. In the drawings used in the following description, the scale of each component has been appropriately changed in order to make each component recognizable.

[0015] <Door drive system for railway vehicles> Figure 1 is a view of a railway vehicle equipped with the railway vehicle door drive device 1 of the embodiment, as seen from the outside in the vehicle width direction.

[0016] As shown in Figure 1, the railway vehicle door consists of a pair of double-sliding doors 11A and 11B that open and close the entrance / exit 10 of the railway vehicle. In Figure 1, the doors 11A and 11B are shown in the fully closed position.

[0017] In the following explanation, the Cartesian coordinate system of X, Y, and Z will be used as needed. The X direction corresponds to the longitudinal direction of the railway vehicle. The Y direction corresponds to the width direction of the railway vehicle. The Z direction corresponds to the height direction of the railway vehicle, which is perpendicular to the X and Y directions. In the following explanation, the side of the arrow in the diagram will be considered the positive (+) side, and the side opposite the arrow will be considered the negative (-) side. The +Y side corresponds to the inside of the vehicle width direction, and the -Y side corresponds to the outside of the vehicle width direction. The +Z side corresponds to the upper side in the vertical direction, and the -Z side corresponds to the lower side in the vertical direction.

[0018] The railway vehicle door drive device 1 comprises a drive unit 2 for driving doors 11A and 11B that open and close the entrance / exit 10 of the railway vehicle, a locking mechanism 3 for locking the doors 11A and 11B from moving in the opening direction when they are in the fully closed position, and a manual unlocking mechanism 4 for releasing the lock of the locking mechanism 3 by manual operation.

[0019] Figure 2 is a perspective view of the railway vehicle door drive device 1 of the embodiment, viewed from the side of the door suspension parts 12A and 12B. Figure 3 is a perspective view of the railway vehicle door drive device 1 of the embodiment, viewed from the opposite side of the door suspension parts 12A and 12B. Figure 4 is a view of the railway vehicle door drive device 1 of the embodiment, viewed from the vehicle width direction, and corresponds to arrow IV in Figure 3. Referring to Figures 2 to 4, the railway vehicle door drive device 1 further comprises a rail 5 extending along the opening and closing direction of the doors 11A and 11B, and a slider 6 to which the door hanging parts 12A and 12B are connected and which moves along the rail 5. Viewed from the vehicle width direction, the drive unit 2 overlaps with at least a portion of the rail 5.

[0020] Rail 5 extends in the X direction above the entrance / exit 10. Doors 11A and 11B are provided to move back and forth along rail 5. Door hangers 12A and 12B are connected to the upper edges of doors 11A and 11B. Doors 11A and 11B have thickness in the Y direction. Door hangers 12A and 12B are supported on rail 5 via sliders 6 so as to be movable in the X direction relative to rail 5. The upper parts of door hangers 12A and 12B are connected to the lower parts of sliders 6. Sliders 6 may be provided with rollers that can roll on rail 5.

[0021] <Drive Unit> The drive unit 2 comprises a motor 20 (an example of an actuator), a rack and pinion mechanism 30, and a planetary gear mechanism 40. The motor 20 is positioned between the vertical rails 5, near the center in the X direction at the entrance / exit 10. The motor 20 has a direct-drive output shaft 20a that can rotate in both forward and reverse directions. The output shaft 20a of the motor 20 extends in the Y direction. When the motor 20 is driven, the doors 11A and 11B are opened and closed, the doors 11A and 11B are locked, and the doors 11A and 11B are unlocked.

[0022] The rack and pinion mechanism 30 comprises racks 31A and 31B to which the doors 11A and 11B are attached, and a pinion 32 that meshes with the racks 31A and 31B. There are two racks 31A and 31B. The racks 31A and 31B extend in the X direction parallel to the rail 5.

[0023] Above the entrance / exit 10, a base 15 supporting each component is fixed to the side wall of the railway vehicle. A rack support 16 supporting racks 31A and 31B is fixed to the base 15. Racks 31A and 31B are supported by the rack support 16 so as to be movable in the X direction. The two racks 31A and 31B are arranged parallel to each other with a vertical gap between them. The teeth of the two racks 31A and 31B are arranged to face each other.

[0024] The pinion 32 is positioned between the two racks 31A and 31B on both sides (vertically), near the center in the X direction of the entrance / exit 10. The pinion 32 simultaneously meshes with the teeth of each of the two racks 31A and 31B. The pinion 32 is rotatably positioned around an axis along the Y direction.

[0025] Each of the two racks 31A and 31B has a connecting member 50A and 50B at one end. The connecting members 50A and 50B are fixed to the door hanging parts 12A and 12B via sliders 6. Each of the two racks 31A and 31B is connected to the corresponding doors 11A and 11B via the connecting members 50A and 50B.

[0026] The rack and pinion mechanism 30 is composed of two racks 31A and 31B and a pinion 32. The rack and pinion mechanism 30 drives the two doors 11A and 11B to open and close. The rack and pinion mechanism 30 connects the pair of doors 11A and 11B to each other, enabling symmetrical opening and closing movements of the doors 11A and 11B.

[0027] Doors 11A and 11B are positioned close to each other along rail 5 in the closing direction A CLS ,B CLS And, in the opening direction A, they move away from each other. OPN ,B OPN It is movable in both directions. The opening direction A of one door 11A OPN and the opening direction B of the other door 11B OPN These are in opposite directions. The closing direction of one door 11A is A CLS and the closing direction B of the other door 11B CLS These are opposite directions.

[0028] The planetary gear mechanism 40 is supported by the base 15. The planetary gear mechanism 40 selectively distributes the output of the motor 20 to the rack and pinion mechanism 30 and the locking mechanism 3. The planetary gear mechanism 40 includes a sun gear 41, an internal gear 42 (an example of a first output section), a carrier 43 (an example of a second output section), and a planetary gear 44.

[0029] The sun gear 41 is rotatably supported about an axis along the Y direction by bearings or the like (not shown). A plurality (e.g., four) of planetary gears 44 are arranged on the outer periphery of the sun gear 41. The planetary gears 44 are configured to be capable of rotation and revolution. The internal gear 42 has internal teeth that mesh with the planetary gears 44. The carrier 43 rotatably supports the planetary gears 44 around the sun gear 41.

[0030] The sun gear 41, the internal gear 42, and the carrier 43 are arranged on the same axis as the axis of the pinion 32. Each of the sun gear 41, the internal gear 42, and the carrier 43 is arranged such that adjacent members (meshing members) can rotate relative to each other.

[0031] The output shaft 20a of the motor 20 is connected to the sun gear 41. The output of the motor 20 is input to the sun gear 41. Note that the sun gear 41 and the output shaft 20a are not necessarily directly connected to each other, and may be connected via a reduction mechanism or the like.

[0032] The internal gear 42 is connected to the pinion 32 of the rack-and-pinion mechanism 30 by fastening members such as bolts. The internal gear 42 can transmit the output of the motor 20 to the pinion 32. With the above configuration, the rack-and-pinion mechanism 30 can move the doors 11A, 11B in the opening directions A OPN , B OPN and the closing directions A CLS , B CLS and is movable.

[0033] <Lock mechanism> The locking mechanism 3 is provided on the side opposite to the door hanging parts 12A and 12B that support the doors 11A and 11B relative to the drive unit 2. The locking mechanism 3 is movable between a locked position in which it engages with the locking pins 60A and 60B to lock the doors 11A and 11B in their fully closed position, and an unlocked position in which it does not engage with the locking pins 60A and 60B. The locking mechanism 3 locks the doors 11A and 11B from moving in the opening direction when they are in their fully closed position and are driven by the drive unit 2. The locking mechanism 3 is configured to be operable by the output of the motor 20.

[0034] The lock pins 60A and 60B are fixed to connecting members 50A and 50B that connect the lock mechanism 3 and the racks 31A and 31B. The lock pins 60A and 60B extend vertically upward from the inward portion in the X direction at the top of the connecting members 50A and 50B. The lock pins 60A and 60B are movable together with the doors 11A and 11B. The lock pins 60A and 60B move together with the doors 11A and 11B by receiving driving force from the drive unit 2.

[0035] When doors 11A and 11B are in the fully closed position, the lock pins 60A and 60B are restrained by the lock mechanism 3. This restricts the movement of doors 11A and 11B in the X direction (especially in the opening direction A). OPN ,B OPN The movement to the door is locked. The locking mechanism 3 locks the doors 11A and 11B when they are in the fully closed position and the doors 11A and 11B are in the opening direction A. OPN ,B OPN Restrict movement to [location].

[0036] Figure 5 is a perspective view including a cross-section of the locking mechanism 3 of the embodiment. Figure 6 is a perspective view of the locking mechanism 3 of the embodiment viewed from the opposite side from the door hanging portion. Referring together to Figures 5 and 6, the locking mechanism 3 comprises a plurality of links 62a, 62b, 62c, a support member 64 that rotatably supports each of the plurality of links 62a, 62b, 62c around an axis along the vertical direction, and a receiving member 69 that receives at least one support member 64 from below in the vertical direction.

[0037] In the example shown in Figure 5, the receiving member 69 supports the support member 64 of the central link 62a, one of the three links 62a, 62b, and 62c, from below in the vertical direction. The receiving member 69 may also be configured to support the support members 64 of the other links 62b and 62c from below in the vertical direction. The configuration of the receiving member 69 can be changed according to the design specifications.

[0038] Figure 7 is a bottom view showing the unlocked state of the locking mechanism 3 of the embodiment. Figure 8 is a bottom view showing the locked state of the locking mechanism 3 of the embodiment. Referring together to Figures 7 and 8, the locking mechanism 3 comprises vertically extending rotating shafts 65A and 65B, rotating members 66A and 66B that can rotate between an unlocked position and a locked position with respect to the rotating shafts 65A and 65B as the center of rotation, a locking slider 80 that moves by receiving a driving force from the carrier 43 (see Figure 4), and a link mechanism 61 that pushes the rotating members 66A and 66B to rotate in accordance with the movement of the locking slider 80.

[0039] The rotating shafts 65A and 65B are located vertically above the racks 31A and 31B. The rotating members 66A and 66B are supported on the base 15 via the rotating shafts 65A and 65B. The rotating members 66A and 66B are in the opening direction A OPN ,B OPN Or closing direction A CLS ,B CLS By contact with the moving lock pins 60A and 60B, the rotating members 66A and 66B can rotate around the rotating shafts 65A and 65B as the center of rotation. The rotating members 66A and 66B have concave first recesses 67A and 67B and second recesses 68A and 68B that are recessed inward (towards the rotating shafts 65A and 65B) from the outer periphery of the rotating members 66A and 66B when viewed from the vertical direction. The first recesses 67A and 67B and the second recesses 68A and 68B open outward from the rotating members 66A and 66B when viewed from the vertical direction. The first recesses 67A and 67B and the second recesses 68A and 68B are spaced apart from each other in the circumferential direction of the rotating members 66A and 66B when viewed from the vertical direction.

[0040] The rotating members 66A and 66B, when viewed from the vertical direction, include a first wall 66c provided between the first recesses 67A and 67B and the second recesses 68A and 68B in the circumferential direction of the rotating members 66A and 66B, and a second wall 66d provided on the opposite side of the first wall 66c, with the first recesses 67A and 67B in between, in the circumferential direction of the rotating members 66A and 66B. When viewed from the vertical direction, the first wall 66c and the second wall 66d are curved outward from the rotating members 66A and 66B.

[0041] The rotating members 66A and 66B are provided with bulging portions 66e that function as retaining parts for preventing the lock pins 60A and 60B from coming loose. When viewed from the vertical direction, the bulging portion 66e bulges in the direction in which the second recesses 68A and 68B of the first wall body 66c open, near the second recesses 68A and 68B.

[0042] The first recesses 67A and 67B of the rotating members 66A and 66B are located in the opening direction A of the rotating shafts 65A and 65B. OPN ,B OPN Return springs 74A and 74B are provided to apply elastic force to the rotating members 66A and 66B so that they face sideways. For example, the return springs 74A and 74B are torsion springs. One end of the return springs 74A and 74B is attached to the base-side protrusions 75A and 75B provided on the base body 15. The other end of the return springs 74A and 74B is attached to the rotating-side protrusions 76A and 76B provided on the first wall 66c of the rotating members 66A and 66B.

[0043] When the rotating members 66A and 66B are not subjected to any external force, the first recesses 67A and 67B are opened in direction A by the elastic force of the return springs 74A and 74B. OPN ,B OPN Facing sideways, and with the second recesses 68A and 68B in the closed direction A CLS ,B CLS It is held in a position facing sideways. On the other hand, lock pins 60A and 60B are in the closing direction A CLS ,B CLSWhen the rotating members 66A and 66B move towards the fully closed position, the first wall 66c (the edge on the side of the first recess 67A and 67B) of the rotating members 66A and 66B is pushed by the lock pins 60A and 60B. As a result, the rotating members 66A and 66B rotate in the directions of arrows E1 and E2 with the rotation axis 65A and 65B as the center of rotation, against the elastic force of the return springs 74A and 74B. Then, the second recesses 68A and 68B of the rotating members 66A and 66B move closer to the link mechanism 61.

[0044] As shown in Figure 8, when doors 11A and 11B are in the fully closed position, the lock pins 60A and 60B are inserted into the first recesses 67A and 67B of the rotating members 66A and 66B. As a result, the lock pins 60A and 60B and the rotating members 66A and 66B engage with each other.

[0045] As shown in Figure 4, the locking slider 80 moves by receiving a driving force from the carrier 43. The locking slider 80 is a component for switching between the locked and unlocked states of the doors 11A and 11B. The carrier 43 is connected to a moving member 81 that moves the locking slider 80. The carrier 43 can transmit the output of the motor 20 to the link mechanism 61 via the moving member 81 and the locking slider 80.

[0046] The movable member 81 and the locking slider 80 are movable along a guide shaft 82 that extends in the X direction parallel to the racks 31A and 31B. Both ends of the guide shaft 82 in the X direction are fixed to the rack support 16. The movable member 81 and the locking slider 80 are provided so as to be able to reciprocate along the guide shaft 82 in the X direction. The movable member 81 and the locking slider 80 constitute a switching mechanism for switching between a locked state and an unlocked state. The movable member 81 is connected to the carrier 43 so as to be able to move in the locking direction C and the unlocking direction D as the carrier 43 rotates.

[0047] The locking slider 80 includes shaft mounting portions 80a and 80b attached to the guide shaft 82, an upper wall portion 80c extending in the Y direction from the upper ends of the shaft mounting portions 80a and 80b, and a protruding shaft 80d projecting upward from the upper wall portion 80c. The shaft mounting portions 80a and 80b are provided as a pair, spaced apart in the X direction via a movable member 81. The movable member 81 is attached to the guide shaft 82 at a position sandwiched between the pair of shaft mounting portions 80a and 80b.

[0048] The guide shaft 82 is provided with lock springs 83A and 83B that apply elastic force to the locking slider 80, pushing the shaft mounting portions 80a and 80b of the locking slider 80 in the locking direction C. For example, the lock springs 83A and 83B are compression coil springs. The lock springs 83A and 83B prevent the locking slider 80 from returning to the unlocked position when it is in the locked position.

[0049] As shown in Figure 7, the protruding shaft 80d of the locking slider 80 can contact the projection 62d of the link 62a. For example, when the locking slider 80 moves in the unlocking direction D, the protruding shaft 80d changes the position of the link 62a. As a result, the posture (position) of the link mechanism 61 changes. A roller may be rotatably mounted on the protruding shaft 80d with the protruding shaft 80d as the center of rotation.

[0050] The link mechanism 61 is configured to deform horizontally, allowing it to be bent in a zigzag (Z-shape) manner relative to the X direction when viewed from the vertical (see Figure 7), and to be in a straight line extending along the X direction (see Figure 8). The link mechanism 61 is formed by connecting multiple (for example, three) links 62a, 62b, and 62c. Of the three links 62a, 62b, and 62c, the central link 62a is connected to a connecting pin 63a. This allows the central link 62a to rotate freely relative to the base 15.

[0051] The central link 62a extends so as to straddle the connecting pin 63a when viewed from the vertical direction. A first pin 63b extending in the vertical direction is provided at one end of the central link 62a. A second pin 63c extending in the vertical direction is provided at the other end of the central link 62a. The central link 62a is provided with a projection 62d that protrudes outward from the central link 62a when viewed from the vertical direction. The projection 62d is provided in the portion of the central link 62a between the connecting pin 63a and the first pin 63b when viewed from the vertical direction.

[0052] Two links 62b and 62c, located on the sides of the connecting pin 63a, are connected to the central link 62a so as to be rotatable relative to each other. One of the two links 62b, 62c, is connected to one end of the central link 62a via the first pin 63b so as to be rotatable relative to each other. The other of the two links 62b, 62c, is connected to the other end of the central link 62a via the second pin 63c so as to be rotatable relative to each other.

[0053] One link 62b extends from the first pin 63b toward one of the rotating members 66B when viewed from the vertical direction. A third pin 63d extending vertically is provided on the part of one link 62b that is on the side of the rotating member 66B. The other link 62c extends from the second pin 63c toward the other rotating member 66A when viewed from the vertical direction. The portion of the other link 62c facing the other rotating member 66A is provided with a fourth pin 63e that extends vertically.

[0054] The third pin 63d and the fourth pin 63e are located at the end of the link mechanism 61. Guide grooves 70A and 70B are formed in the base body 15, extending parallel to the locking direction C. A pair of guide grooves 70A and 70B are provided spaced apart in the X direction. The upper end of the third pin 63d is inserted into one of the guide grooves 70B. This allows the third pin 63d to move in the X direction along the guide groove 70B. The upper end of the fourth pin 63e is inserted into the other guide groove 70A. This allows the fourth pin 63e to move in the X direction along the other guide groove 70A. With the above configuration, the movement of pins 63d and 63e is guided by guide grooves 70A and 70B.

[0055] Furthermore, rollers may be rotatably attached to the upper ends of pins 63d and 63e (the portions inserted into guide grooves 70A and 70B). This reduces the frictional resistance of pins 63d and 63e against the inner walls of guide grooves 70A and 70B, and allows for smoother movement of pins 63d and 63e. Furthermore, rollers may be rotatably attached to the lower ends of pins 63d and 63e (the parts that come into contact with the rotating members 66A and 66B). This reduces frictional resistance during the relative movement of pins 63d and 63e and rotating members 66A and 66B, thereby stabilizing the locking operation.

[0056] As shown in Figure 8, when doors 11A and 11B are in the fully closed position, the lock pins 60A and 60B enter into the first recesses 67A and 67B of the rotating members 66A and 66B, causing the lock pins 60A and 60B and the rotating members 66A and 66B to engage with each other. Also, when doors 11A and 11B are in the fully closed position, the opening direction A of links 62b and 62c OPN ,B OPN As the ends of the links 62b and 62c and the rotating members 66A and 66B engage with each other, the ends of the links 62b and 62c and the rotating members 66A and 66B engage with each other. At this time, the link mechanism 61 is in a straight line along the X direction.

[0057] When the link mechanism 61 is in a straight line, the lock pins 60A and 60B are in the opening direction A. OPN ,B OPN When a force is applied to the rotation of the rotating members 66A and 66B, the rotation is restricted as follows: The opening direction A of both ends of the link mechanism 61 in a straight state (links 62b and 62c) OPN ,B OPNThe ends of the rotating members 66A and 66B are held in place by the peripheral portions of the second recesses 68A and 68B of the rotating members 66A and 66B. For example, when the link mechanism 61 is in a straight line and the rotating members 66A and 66B attempt to rotate in the directions of arrows F1 and F2, a bulge 66e is formed in the portion where the rotational force is transmitted from links 62b and 62c to the rotating members 66A and 66B. This makes it difficult for links 62b and 62c to come out of the second recesses 68A and 68B of the rotating members 66A and 66B. Therefore, the opening direction A of the lock pins 60A and 60B that are engaged with the rotating members 66A and 66B OPN ,B OPN Movement to the rotating members 66A and 66B is restricted by the first recesses 67A and 67B of the rotating members 66A and 66B.

[0058] <Operation of each part in the unlocked state> As shown in Figure 7, in the unlocked state, the link mechanism 61 is bent in a zigzag (Z-shape) manner with respect to the X direction. As shown in Figure 4, for example, when the sun gear 41 of the planetary gear mechanism 40 is driven by the motor 20 in the unlocked state, the driving force input to the sun gear 41 is transmitted as follows: The driving force input to the sun gear 41 is transmitted to the pinion 32 via the internal gear 42, or it causes the planetary gear 44 to revolve and rotate the carrier 43. When the carrier 43 rotates, the moving member 81 moves in the locking direction C.

[0059] During the normal closing operation of doors 11A and 11B, the planetary gear 44 rotates in conjunction with the rotation of the sun gear 41 of the planetary gear mechanism 40. As a result, the driving force of the sun gear 41 is transmitted to the pinion 32 via the internal gear 42, causing the pinion 32 to rotate. The rotation of the pinion 32 causes the racks 31A and 31B to open in direction A. OPN ,B OPN Or closing direction A CLS ,B CLS Move to this position. This will drive doors 11A and 11B to open and close.

[0060] <Mechanical operation when the door closes> For example, the operation of moving doors 11A and 11B from the fully open position to the fully closed position and locking doors 11A and 11B with the locking mechanism 3 is performed as follows. First, in order to move doors 11A and 11B from the fully open position to the fully closed position, the output shaft 20a of the motor 20 is rotated in one direction. As a result, the driving force of the motor 20 is transmitted in the order of sun gear 41, planetary gear 44, and internal gear 42. The driving force transmitted to the internal gear 42 rotates the pinion 32. Due to the rotation of the pinion 32, the racks 31A and 31B and the doors 11A and 11B connected to the racks 31A and 31B move in the closing direction A CLS ,B CLS Move to [destination].

[0061] Doors 11A and 11B are closed in direction A. CLS ,B CLS When moved to this position, lock pins 60A and 60B also close in direction A. CLS ,B CLS They move to the following position. Then, as shown in Figure 7, the lock pins 60A and 60B rotate the rotating members 66A and 66B around the rotation axis 65A and 65B in the direction of arrows E1 and E2, against the elastic force of the return springs 74A and 74B. As a result, the lock pins 60A and 60B enter the first recesses 67A and 67B of the rotating members 66A and 66B.

[0062] Then, the lock pins 60A and 60B reach the fully closed position together with the doors 11A and 11B. As shown in Figure 8, in the fully closed position of the doors 11A and 11B, the lock pins 60A and 60B engage with the rotating members 66A and 66B by entering into the first recesses 67A and 67B of the rotating members 66A and 66B. In the fully closed position of the doors 11A and 11B, both ends of the link mechanism 61 in the X direction (the opening direction A of links 62b and 62c) are in a straight line. OPN ,B OPN The end portion of the rotating members 66A and 66B engages with the rotating members 66A and 66B by fitting into the second recesses 68A and 68B of the rotating members 66A and 66B.

[0063] Both ends of the link mechanism 61 in a straight state are held by being sandwiched between the peripheral portions of the second recesses 68A and 68B of the rotating members 66A and 66B. For example, when the rotating members 66A and 66B attempt to rotate in the directions of arrows F1 and F2 due to the elastic force of the return springs 74A and 74B, a bulge 66e is formed in the portion where the rotational force is transmitted from links 62b and 62c to the rotating members 66A and 66B. This makes it difficult for links 62b and 62c to come out of the second recesses 68A and 68B of the rotating members 66A and 66B. Therefore, the opening direction A of the lock pins 60A and 60B that are engaged with the rotating members 66A and 66B OPN ,B OPN Movement to the door is restricted by the first recesses 67A and 67B of the rotating members 66A and 66B. In other words, the doors 11A and 11B are locked.

[0064] As described above, after the doors 11A and 11B move to the fully closed position due to the output of the motor 20, the locking mechanism 3 is activated by the output of the motor 20. This locks the doors 11A and 11B. Therefore, by simply driving the sun gear 41 of the planetary gear mechanism 40 with a single motor 20, it is possible to achieve locking that is linked to the closing operation of the doors 11A and 11B.

[0065] In addition, when locked, the system is double-locked by a lock that restricts the rotation of the rotating members 66A and 66B by the link mechanism 61, and by a lock that restricts the deformation of the link mechanism 61 from a straight state to a bent state by the locking slider 80. This ensures that, for example, even if the motor 20 experiences a power failure due to a power outage or malfunction in the vehicle, and the rotation of the output shaft 20a of the motor 20 becomes free, the opening of the doors 11A and 11B is extremely reliably prevented by the double locking mechanism. For example, even if the vehicle experiences a power outage, it is possible to prevent the doors 11A and 11B from unexpectedly opening due to wind pressure or the like.

[0066] <Mechanical operation when opening a door> For example, the operation of unlocking doors 11A and 11B by the locking mechanism 3 and moving doors 11A and 11B from the fully closed position to the fully open position is performed as follows. As shown in Figure 4, in order to move doors 11A and 11B from the fully closed position to the fully open position, the output shaft 20a of the motor 20 is rotated in the opposite direction (opposite to the direction during closing). When the output shaft 20a of the motor 20 is rotated in the opposite direction while doors 11A and 11B are locked, the carrier 43 rotates in the clockwise direction (right-hand direction on the paper) as shown in Figure 4. As a result, the moving member 81 and the locking slider 80 move in the unlocking direction D against the elastic force of the lock springs 83A and 83B.

[0067] At this time, the protruding shaft 80d (see Figure 8) of the locking slider 80 moves in the unlocking direction D. As a result, the central link 62a of the link mechanism 61 rotates around the connecting pin 63a as its center of rotation. This causes the link mechanism 61 to transition from the straight state shown in Figure 8 to the bent state shown in Figure 7. As a result, the pins 63d and 63e located at both ends of the link mechanism 61 disengage from the second recesses 68A and 68B of the rotating members 66A and 66B, releasing their engagement with the rotating members 66A and 66B. Therefore, the rotation of the rotating members 66A and 66B is permitted, and the locks on the doors 11A and 11B are released. The rotating members 66A and 66B are pushed in the directions of arrows F1 and F2, with the rotation axis 65A and 65B as the center of rotation, by the elastic force of the return springs 74A and 74B.

[0068] As shown in Figure 4, for example, when the amount of rotation of the carrier 43 reaches a predetermined amount, the movement of the locking slider 80 in the unlocking direction D is limited by the deformation limits of the lock springs 83A and 83B. However, the limitation of the movement of the locking slider 80 in the unlocking direction D is not limited to the lock springs 83A and 83B being compressed to their deformation limits. For example, the limitation of the movement of the locking slider 80 in the unlocking direction D may be achieved by the carrier 43 contacting the base 15 at a predetermined position. For example, the limitation of the movement of the locking slider 80 in the unlocking direction D may be achieved by changing the length of the guide grooves 70A and 70B into which the pins 63d and 63e of the link mechanism 61 are inserted, thereby limiting the movement of the pins 63d and 63e by the walls of the guide grooves 70A and 70B.

[0069] For example, when the movement of the locking slider 80 in the unlocking direction D is restricted, the driving force of the sun gear 41 is transmitted to the internal gear 42. The driving force transmitted to the internal gear 42 rotates the pinion 32. The rotation of the pinion 32 causes the racks 31A, 31B and the doors 11A, 11B connected to the racks 31A, 31B to move in the opening direction A OPN ,B OPN It moves to the fully open position. As a result, doors 11A and 11B move toward the fully open position.

[0070] <Manual unlocking mechanism> Referring to Figures 1 to 4, the manual unlocking mechanism 4 comprises an operating unit 90 that is operated manually, and an unlocking unit 91 that receives the operating force from the manual operation and releases the lock of the locking mechanism 3. The unlocking unit 91 is located on the opposite side of the drive unit 2 from the door hanging units 12A and 12B. The unlocking unit 91 is located on the opposite side of the drive unit 2 from the locking mechanism 3. In this embodiment, the unlocking unit 91, locking mechanism 3, and drive unit 2 are arranged in the order of top to bottom in the vertical direction.

[0071] The operating unit 90 is connected to the unlocking unit 91 via the traction members 95A and 95B. For example, the operating unit 90 is configured to include an operating handle that can be operated manually. The operating unit 90 is capable of transmitting operating force to the unlocking unit 91 via the traction members 95A and 95B.

[0072] For example, the manual unlocking mechanism 4 may be positioned to be operable from inside the vehicle or from outside the vehicle. For instance, the manual unlocking mechanism 4 may be positioned in a location where it can be operated by passengers, crew, station staff, etc., in emergencies. The arrangement of the manual unlocking mechanism 4 can be changed according to the design specifications.

[0073] For example, the traction members 95A and 95B are cables. One end of the traction members 95A and 95B is connected to the operating unit 90. The other end of the traction members 95A and 95B is connected to the unlocking unit 91. The traction members 95A and 95B transmit linear motion (operating force along the X direction) transmitted from the operating unit 90 to the unlocking unit 91. A pressing force (elastic force) is applied to the traction members 95A and 95B by elastic parts such as the springs 94A and 94B that constitute the unlocking unit 91. As a result, a pulling force is applied to the traction members 95A and 95B in the +X direction.

[0074] The unlocking unit 91 comprises blocks 92A and 92B, shafts 93A and 93B, and elastic parts such as springs 94A and 94B. The other ends of the traction members 95A and 95B are connected to the blocks 92A and 92B. The blocks 92A and 92B are movable in the X direction along the shafts 93A and 93B.

[0075] On the other hand, block 92A is subjected to a pressing force (elastic force) from an elastic part such as spring 94A. On the other block 92B, a pressing force (elastic force) is acting from an elastic part such as a spring 94B.

[0076] Blocks 92A and 92B are moved by being pulled in the -X direction by traction members 95A and 95B connected to the operating unit 90. Blocks 92A and 92B move against the pressing force of springs 94A and 94B as their respective traction members 95A and 95B are pulled in the -X direction. Blocks 92A and 92B can operate independently of each other.

[0077] <Example of a locked state> Referring to Figures 1 to 8, for example, under normal conditions such as when a train is in motion, doors 11A and 11B are in the fully closed position and locked by the locking mechanism 3. For example, they are locked when a train is in motion or when boarding or alighting is not possible through the door on the opposite side of the platform.

[0078] In Figure 3, the cables (traction members 95A, 95B) are pulled in the +X direction by the pressing force (elastic force) of the elastic parts such as springs 94A, 94B. At this time, blocks 92A, 92B are pulled in the +X direction together with the traction members 95A, 95B.

[0079] <Example of unlocking operation> For example, in an emergency or during maintenance, the operating unit 90, which includes an operating handle that can be manually operated, is operated. As a result, blocks 92A and 92B are pulled in the -X direction via the traction members 95A and 95B. Blocks 92A and 92B move in the -X direction along shafts 93A and 93B, resisting the pressing force of elastic parts such as springs 94A and 94B.

[0080] Then, blocks 92A, 92B, the locking slider 80, and the moving member 81 move together in the -X direction. That is, the locking slider 80 moves in the unlocking direction D. As a result, the protruding shaft 80d of the locking slider 80 comes into contact with the link 62a, and the link 62a rotates as described above, resulting in the unlocked state (see Figure 7). This releases the lock on doors 11A and 11B by the locking mechanism 3.

[0081] <Effects and Effects> As described above, the railway vehicle door drive device 1 according to this embodiment includes a drive unit 2 that drives doors 11A and 11B that open and close the entrance / exit 10 of the railway vehicle, and a locking mechanism 3 that locks the doors 11A and 11B from moving in the opening direction when they are in the fully closed position. The locking mechanism 3 is provided on the side opposite to the drive unit 2 from the door suspension parts 12A and 12B that support the doors 11A and 11B.

[0082] With this configuration, compared to the case where the locking mechanism 3 is provided on the door hanging parts 12A and 12B side relative to the drive unit 2, a larger space can be secured between the door hanging parts 12A and 12B and the drive unit 2. Therefore, the space between the door hanging parts 12A and 12B and the drive unit 2 can be used effectively.

[0083] Figure 9 illustrates the arrangement of the locking mechanism in the embodiment. Figure 10 illustrates the arrangement of the locking mechanism in the comparative example. As shown in Figure 10, in the comparative example where the locking mechanism is located on the door hanging side relative to the drive unit, there is a possibility that the locking mechanism may come into contact with the curved portion of the lintel. In the comparative example, in order to avoid the locking mechanism coming into contact with the curved portion of the lintel, the drive unit, locking mechanism, and unlocking unit must be installed at an angle to allow clearance (see dashed line in Figure 10). In contrast, in this embodiment, as shown in Figure 9, the locking mechanism is provided on the opposite side of the door support section from the drive unit, thereby avoiding contact between the locking mechanism and the curved portion of the door frame. Furthermore, the distance from the door frame to the drive unit can be shortened (see dashed line in Figure 9).

[0084] The railway vehicle door drive device 1 according to this embodiment further includes a manual unlocking mechanism 4 for manually unlocking the lock mechanism 3. The manual unlocking mechanism 4 includes an operating part 90 that is operated manually, and an unlocking part 91 that receives the operating force from the manual operation and unlocks the lock mechanism 3. The unlocking part 91 is provided on the side opposite to the door suspension parts 12A and 12B relative to the drive unit 2. The unlocking part 91 is provided on the side opposite to the drive unit 2 relative to the lock mechanism 3. With this configuration, compared to the case where the unlocking unit 91 is provided on the door hanging unit 12A, 12B side relative to the drive unit 2, a larger space can be secured between the door hanging unit 12A, 12B and the drive unit 2. Therefore, the space between the door hanging unit 12A, 12B and the drive unit 2 can be effectively utilized. For example, it is possible to avoid situations where the unlocking unit 91 comes into contact with the curved portion of the door frame. The distance from the door frame to the drive unit 2 can be shortened.

[0085] The door drive device 1 for railway vehicles according to this embodiment further comprises a rail 5 extending along the opening and closing direction of the doors 11A and 11B, and a slider 6 to which the door hanging parts 12A and 12B are connected and which moves along the rail 5. When viewed from the vehicle width direction, the drive unit 2 overlaps with at least a portion of the rail 5. With this configuration, the door drive device 1 for railway vehicles can be made smaller in the vertical direction of the vehicle compared to the case where the drive unit 2 does not overlap with the entire rail 5 when viewed from the vehicle width direction.

[0086] The locking mechanism 3 according to this embodiment comprises a plurality of links 62a, 62b, 62c, a support member 64 that rotatably supports each of the plurality of links 62a, 62b, 62c around an axis along the vertical direction, and a receiving member 69 that receives at least one support member 64 from below in the vertical direction. With this configuration, the receiving member 69 can prevent the downward displacement of links 62a, 62b, and 62c due to gravity.

[0087] <Variation> It should be noted that the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0088] In the embodiments described above, the door drive device for railway vehicles further includes a manual unlocking mechanism for releasing the lock mechanism by manual operation. The manual unlocking mechanism comprises an operating part that is operated manually and an unlocking part that receives the operating force from the manual operation to release the lock mechanism. The unlocking part is provided on the side of the drive unit opposite to the door suspension part, and the unlocking part is provided on the side of the lock mechanism opposite to the drive unit. However, the invention is not limited to this example. For example, the unlocking part may be provided on the side of the drive unit relative to the lock mechanism (between the lock mechanism and the drive unit). The installation configuration of the unlocking part can be changed according to the design specifications.

[0089] In the embodiments described above, the door drive device for railway vehicles further comprises a rail extending in the direction of opening and closing the door, and a slider to which the door hanger is connected and which moves along the rail, and the drive unit is shown overlapping with at least a portion of the rail when viewed from the vehicle width direction, but it is not limited to this. For example, the drive unit does not have to overlap with the entire rail when viewed from the vehicle width direction. The installation configuration of the drive unit when viewed from the vehicle width direction can be changed according to the design specifications.

[0090] In the embodiments described above, the locking mechanism was explained using an example comprising a plurality of links, a support member that rotatably supports each of the plurality of links around an axis along the vertical direction, and a receiving member that receives at least one support member from below in the vertical direction. However, it is not limited to this example. For example, the receiving member may be configured to receive at least one support member from a direction different from the vertical direction. The configuration of the receiving member can be changed according to the design specifications.

[0091] In the embodiments described above, the locking mechanism was explained as moving from the unlocked position to the locked position by receiving a driving force from the drive unit when the door is moved in the closing direction and then stops, but it is not limited to this. For example, the locking mechanism may move from the unlocked position to the locked position by receiving a driving force from a drive unit other than the drive unit. For example, the locking mechanism may lock the door from moving in the opening direction by receiving a driving force from a second drive unit (a drive unit different from the drive unit that drives the doors that open and close the entrances and exits of railway vehicles) when the door is in the fully closed position. For example, the drive unit is not limited to having a single motor, but may have multiple motors. For example, after the door moves to the fully closed position by the output of the first motor, the door may be locked by the locking mechanism being activated by the output of a second motor different from the first motor. The manner in which the locking mechanism moves from the unlocked position to the locked position can be changed according to the design specifications.

[0092] In the embodiments described above, the drive unit was described as having a rack and pinion mechanism comprising a rack to which the door is attached and a pinion that meshes with the rack, but it is not limited to this. For example, the drive unit may have a belt mechanism or a ball screw mechanism, not just a rack and pinion mechanism. For example, the door drive system is not limited to the so-called rack and pinion system, in which the door opening and closing device has the above-described rack and pinion mechanism and rotates the pinion with a motor to open and close the door attached to the rack. For example, the door drive system may be a so-called belt type, in which the door is connected to a belt stretched between a drive pulley and a driven pulley located spaced apart from each other, and the door is opened and closed by the movement of the belt. For example, the door drive system may be a so-called screw type, in which a screw shaft corresponding to a bolt is rotated with a motor to open and close a door attached to a ball nut corresponding to a nut. For example, the door drive system can be changed according to the design specifications. The configuration of the drive unit can be changed according to the door drive system and design specifications.

[0093] In the embodiments described above, the drive unit was explained using an example that includes a motor (an example of an actuator) and a planetary gear mechanism to which the driving force of the motor is input, but it is not limited to this. For example, the drive unit may include a solenoid instead of a motor. For example, the configuration of the actuator constituting the drive unit can be changed according to the design specifications. For example, the drive unit may include other power transmission mechanisms such as a belt mechanism or a ball screw mechanism instead of a planetary gear mechanism. The configuration of the drive unit can be changed according to the design specifications.

[0094] In the embodiments described above, the planetary gear mechanism was described as having an internal gear (first output unit) that outputs a driving force to the pinion, and a carrier (second output unit) that outputs a driving force to move the locking mechanism between the unlocked position and the locked position when the door stops, but it is not limited to this. For example, the planetary gear mechanism is not limited to connecting the sun gear to the output shaft of the motor, the internal gear to the pinion, and the carrier to the traction member, but the sun gear may be connected to the pinion and the internal gear to the output shaft of the motor. For example, the configuration of the first output unit and the second output unit can be changed according to the configuration and design specifications of the planetary gear mechanism.

[0095] In the embodiments described above, the locking mechanism was described as having a locking slider that moves in response to a driving force from the carrier, and a link mechanism that pushes a rotating member to rotate in accordance with the movement of the locking slider, but it is not limited to this. For example, the locking mechanism does not have to include a locking slider. For example, the link mechanism may push a rotating member to rotate in accordance with the rotation of the carrier. For example, the link mechanism is not limited to having three links. For example, the link mechanism may have two links or four or more links. The configuration of the link mechanism can be changed according to the configuration and design specifications of the door. The configuration of the locking mechanism can be changed according to the design specifications.

[0096] Furthermore, it is possible to replace the components in the above-described embodiments with well-known components without departing from the spirit of the present invention. Also, the above-described modifications may be combined. Among the embodiments disclosed herein, those composed of multiple objects may be integrated, and conversely, those composed of a single object may be divided into multiple objects. Whether or not they are integrated, the invention can be constructed in a way that achieves its objective. In the embodiments disclosed herein, those in which multiple functions are provided in a distributed manner may have some or all of those multiple functions integrated into a single unit, and conversely, those in which multiple functions are integrated may have some or all of those functions provided in a distributed manner. Whether the functions are integrated or distributed, the configuration should be such that the objective of the invention can be achieved. [Explanation of symbols]

[0097] 1...Road vehicle door drive device, 2...Drive unit, 3...Locking mechanism, 4...Manual unlocking mechanism, 5...Rail, 6...Slider, 10...Entrance / exit, 11A,11B...Door, 12A,12B...Door hanging part, 62a,62b,62c...Link, 64...Support member, 69...Receiving member, 90...Operating unit, 91...Unlocking unit

Claims

1. A drive unit that operates the doors that open and close the entrances and exits of railway vehicles, The door is equipped with a locking mechanism that locks the door from moving in the opening direction when the door is in the fully closed position, The locking mechanism is provided on the side opposite to the door support section that supports the door relative to the drive section. Door drive mechanism for railway vehicles.

2. The system further includes a manual unlocking mechanism for releasing the lock mechanism by manual operation, The aforementioned manual unlocking mechanism is A manually operated control unit, The unlocking unit includes an unlocking unit to which the operating force from the manual operation is transmitted and which releases the lock on the locking mechanism, The unlocking unit is provided on the side opposite to the door hanging unit relative to the drive unit. A door drive device for a railway vehicle according to claim 1.

3. The unlocking unit is provided on the opposite side of the locking mechanism from the drive unit. The door drive device for a railway vehicle according to claim 2.

4. A rail extending along the opening and closing direction of the aforementioned door, The door hanging section is further connected to a slider that moves along the rail, Viewed from the vehicle width direction, the drive unit overlaps with at least a portion of the rail, A door drive device for a railway vehicle according to any one of claims 1 to 3.

5. The locking mechanism is Multiple links, A support member that rotatably supports each of the aforementioned plurality of links around an axis along the vertical direction, The system comprises a receiving member that receives at least one of the support members from below in the vertical direction, A door drive device for a railway vehicle according to any one of claims 1 to 3.

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