Door pressing device

Abstract

To provide a door pressing device capable of suppressing complication of a structure inside a vehicle for pressing a door part for the vehicle.SOLUTION: The door pressing device 100 includes link portions 10 and 20 and a motor 30. The link parts 10 and 20 are arranged at a pressing position where the door part 102 for the vehicle in a closed state is pressed from the inside to the outside of the vehicle and an opening position where the state of pressing the door part 102 is released by rotating around a predetermined rotation axis. The motor 30 supplies a driving force for rotating the link portions 10 and 20 between the pressing position and the releasing position by electric driving.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a door stop device. [Background technology]

[0002] BACKGROUND ART Conventionally, an airtight door device has been known (see, for example, Patent Document 1).

[0003] The above-mentioned Patent Document 1 describes an airtightness maintaining device for a door that presses against a vehicle door to maintain the airtightness of the door. This airtightness maintaining device includes a cylinder device and a link member. The cylinder device has a piston rod that is moved by supplying compressed air. The link member has a pressing part that presses against the door and rotates as the piston rod of the cylinder device moves. In the airtightness maintaining device described in the above-mentioned Patent Document 1, the movement of the piston rod causes the link member to rotate, and the door is pressed by the pressing part, maintaining the airtightness of the door. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-11895 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a cylinder device using a fluid such as compressed air is used to rotate a link member and press a door arranged in a vehicle, as in the airtightness maintaining device described in Patent Document 1, the internal structure of the vehicle becomes complicated due to the need to arrange piping for supplying the fluid such as compressed air. Therefore, it is desired to prevent the internal structure of the vehicle from becoming complicated in order to press the vehicle door portion.

[0006] The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to provide a door holding device that can prevent the internal structure of a vehicle from becoming complicated in order to hold down a door portion of the vehicle. [Means for solving the problem]

[0007] In order to achieve the above object, a door holding device according to one aspect of the present invention includes a rotating member that rotates around a predetermined rotation axis to be positioned at a holding position where the vehicle door section in a closed state is held from the inside to the outside of the vehicle, and at an open position where the state of holding the door section is released, and an electric drive unit that supplies a driving force to rotate the rotating member between the holding position and the open position by electric drive.

[0008] As described above, a door holding device according to one aspect of the present invention includes an electric drive unit that supplies a driving force for electrically rotating the rotating member between the holding position and the open position. As a result, the electric drive unit electrically drives the rotating member, so the rotating member can be rotated without piping for supplying a fluid such as compressed air. Therefore, unlike when piping for supplying a fluid is required, the interior structure of the vehicle can be prevented from becoming complicated. As a result, the interior structure of the vehicle can be prevented from becoming complicated due to the need to hold down the vehicle door.

[0009] The door holding device according to the above aspect preferably further includes a holding portion that holds the pivotable member in the holding position. With this configuration, the holding portion holds the pivotable member in the holding position against external forces generated during travel. This reduces the power generated by the electric drive unit to resist external forces generated during travel, thereby enabling the electric drive unit to be made smaller. As a result, the internal structure of the vehicle is less likely to become complicated in order to hold the vehicle door. Furthermore, even when the supply of power from the electric drive unit is stopped, the holding portion can hold the pivotable member in the holding position. Therefore, it is not necessary to continue supplying power from the electric drive unit to hold the pivotable member in the holding position, thereby suppressing an increase in the amount of power consumed by the electric drive unit. Furthermore, because the holding portion can hold the pivotable member in the holding position, the maximum output of the electric drive unit can be set regardless of the magnitude of external forces generated during travel, thereby suppressing an increase in the size of the electric drive unit.

[0010] In this case, preferably, the device further includes a transmission mechanism that transmits the driving force of the electric drive unit to the rotating member, and the holding unit includes a pin member that holds the rotating member in the pressing position by abutting against at least one of the rotating member and the transmission mechanism. With this configuration, the pin member can hold the rotating member in the pressing position by abutting against at least one of the rotating member and the transmission mechanism, so that the rotating member can be easily held by the pin member, which has a relatively simple configuration.

[0011] In the door holding device including the pin member that holds the rotating member in the holding position, preferably, the rotating member includes an abutment portion that abuts against the door portion and is positioned in the holding position by rotating toward one side about a predetermined rotation axis, the electric drive unit positions the rotating member in the holding position by rotating the rotating member beyond an orthogonal position where a line connecting the predetermined rotation axis of the rotating member and the tip of the abutment portion is perpendicular to the surface of the door portion, and the pin member abuts against at least one of the rotating member and the transmission mechanism unit so as to prevent the rotating member in the holding position from rotating toward one side about the predetermined rotation axis. Here, since the rotating member is positioned in the holding position by rotating toward one side about the predetermined rotation axis, when a force is applied to the door portion from outside the vehicle, the force is applied so as to rotate the rotating member toward one side about the predetermined rotation axis. In contrast, in the present invention, the pin member is configured to abut against at least one of the rotating member and the transmission mechanism so as to prevent the rotating member, when positioned in the pressing position, from rotating toward one side about a predetermined rotation axis. Therefore, even when a force is applied to the door section from outside the vehicle, the pin member can hold the rotating member in the pressing position. Furthermore, since the rotating member is positioned in the pressing position by rotating toward one side about the predetermined rotation axis, and the pin member abuts against the rotating member so as to prevent the rotating member from rotating toward one side about the predetermined rotation axis, physical interference between the pin member and the rotating member during movement of the rotating member between the pressing position and the open position can be prevented. Therefore, the rotating member can be moved between the pressing position and the open position without providing a mechanism for moving the pin member, thereby preventing the device configuration from becoming complicated due to a mechanism for moving the pin member.

[0012] In the door holding device including the pin member that holds the pivotable member in the holding position, the pin member is preferably arranged to extend in a direction parallel to a predetermined rotation axis and is configured to be able to change between a holding position in which the pivotable member is held and a free-spin position in which the pivotable member is not held by moving in a direction parallel to the predetermined rotation axis. With this configuration, the pin member is configured to be able to change between the holding position and the free-spin position, so that by placing the pin member in the free-spin position, physical interference of the pin member with the pivotable member during rotation can be suppressed. As a result, by moving the pin member to the free-spin position, the range of rotation of the pivotable member can be easily expanded.

[0013] In this case, preferably, a handle member for moving the pin member is further provided, and the pin member moves from the holding position to the idling position when an operating force is applied to the handle member. With this configuration, the pin member can be moved from the holding position to the idling position by applying an operating force to the handle member, so that the range of rotation of the rotating member can be easily expanded even when the supply of power is stopped during a power outage or other such event.

[0014] In the door holding device according to the above aspect, preferably, the rotating members include a first rotating member and a second rotating member that are arranged along the vertical direction and each presses the door section from the inside to the outside of the vehicle, and the electric drive unit supplies a driving force for commonly rotating the first rotating member and the second rotating member. With this configuration, the first rotating member and the second rotating member that are arranged along the vertical direction can each be rotated by a common electric drive unit, which makes it possible to reduce the complexity of the device configuration and the control process for rotating the first rotating member and the second rotating member compared to when the first rotating member and the second rotating member are each rotated by an electric drive unit that is separately arranged.

[0015] In this case, the device preferably further includes a transmission mechanism that transmits driving force from the electric drive unit to the rotating member, the electric drive unit including a motor that rotates a motor shaft by electric drive, the transmission mechanism including a pinion connected to the motor shaft and a rack having a rod shape extending in the vertical direction and moving in the vertical direction as the motor rotates by engaging with the pinion, the first rotating member and the second rotating member each rotating in conjunction with the vertical movement of the rack. With this configuration, the rack-and-pinion structure formed by the pinion unit and the rack unit allows the first rotating member and the second rotating member to easily rotate in conjunction with each other. This makes it possible to easily prevent the device configuration from becoming complicated and to easily simplify the control process for rotating the first rotating member and the second rotating member.

[0016] In the door stop device in which the transmission mechanism includes a pinion and a rack, the transmission mechanism preferably includes a rod-shaped first rod connecting an upper portion of the rack to the first pivotable member and a rod-shaped second rod connecting a lower portion of the rack to the second pivotable member, wherein the first pivotable member rotates about a predetermined rotation axis as the first rod moves in response to vertical movement of the rack, and the second pivotable member rotates about a predetermined rotation axis as the second rod moves in response to vertical movement of the rack. With this configuration, the vertical movement of the rack can be transmitted to the first pivotable member by the first rod, and the vertical movement of the rack can be transmitted to the second pivotable member by the second rod. Therefore, compared to transmitting the vertical movement of the rack by gears or the like, changing the shapes of the first rod and the second rod can easily improve the degree of freedom in arranging the rack, the first pivotable member, and the second pivotable member.

[0017] In this case, the first rod portion and the second rod portion preferably have a curved rod shape. With this configuration, by curving the first rod portion and the second rod portion so as to avoid the surrounding components, the surrounding components can be arranged close to the first rod portion and the second rod portion while suppressing physical interference with the first rod portion and the second rod portion, thereby suppressing an increase in the size of the door stop device.

[0018] In the door holding device including the first and second rotating members, the electric drive unit is preferably disposed between the first and second rotating members, which are disposed along the up-down direction. With this configuration, since the electric drive unit is disposed between the first and second rotating members, it is possible to prevent the size of the door holding device from increasing in the up-down direction.

[0019] The door stop device, in which the pin member is configured to be changeable between the holding position and the idling position, preferably further includes a biasing member that biases the pin member from the idling position toward the holding position by elastic force. With this configuration, the pin member, which is in the idling position, can be easily positioned in the holding position by the biasing member. Therefore, even if the pin member is temporarily moved from the holding position to the idling position, the pin member can be easily moved to the holding position by the biasing member.

[0020] The door holding device, in which the pin member is configured to be changeable between a holding position and a free-spinning position, preferably further includes a pin drive unit that moves the pin member from the holding position to the free-spinning position, wherein the pivoting member includes an abutment portion that abuts against the door portion and is positioned in the holding position by rotating toward one side about a predetermined rotation axis, and the electric drive unit, with the pin member moved to the free-spinning position by the pin drive unit, rotates the pivoting member so that a line connecting the predetermined rotation axis of the pivoting member and the tip of the abutment portion does not cross an orthogonal position perpendicular to the surface of the door portion, thereby positioning the pivoting member in the holding position, and the pin member, with the pivoting member positioned in the holding position, is moved from the free-spinning position by the pin drive unit to the holding position, thereby holding the pivoting member in the holding position. With this configuration, the pivoting member is positioned in the holding position without crossing the orthogonal position, thereby reducing the range of rotation of the pivoting member between the open position and the holding position. Therefore, the reduced range of rotation of the pivoting member between the open position and the holding position reduces physical interference between the pivoting member and surrounding components.

[0021] In the door holding device according to the above aspect, preferably, the rotating member holds the railcar door when positioned in the holding position. With this configuration, the rotating member that holds the railcar door can be rotated by an electric drive unit that is driven electrically, so that the rotating member can be rotated by electric drive without piping for supplying a fluid such as compressed air in the railcar. Therefore, it is possible to prevent the internal structure of the railcar from becoming complicated due to the need to hold the railcar door.

[0022] The door holding device according to the above aspect preferably includes a transmission mechanism that rotates the pivotable member from the open position to the holding position by moving downward with the electric drive unit, and an open position maintaining unit that maintains the transmission mechanism in the open position even when the driving force from the electric drive unit is not supplied. With this configuration, even when the driving force from the electric drive unit is not supplied due to a power outage, the open position maintaining unit maintains the transmission mechanism in the open position, thereby preventing the pivotable member from rotating from the open position to the holding position due to downward movement of the transmission mechanism due to its own weight. As a result, even if a power outage occurs while the railway vehicle door is open, the railway vehicle door can be maintained in the open state (a state in which the door portion is not being held down) without the need for user operation.

[0023] In this case, preferably, the open position maintaining unit has a maintaining force that restricts downward movement of the transmission mechanism due to its own weight when no driving force is supplied from the electric drive unit, and allows downward movement of the transmission mechanism when driving force from the electric drive unit is supplied. With this configuration, the open position maintaining unit restricts downward movement of the transmission mechanism due to its own weight when no driving force is supplied from the electric drive unit, so that in the event of a power outage while the transmission mechanism is in the open position, the open state of the railway vehicle door (a state in which the door unit is not being pressed) can be maintained. Furthermore, when driving force from the electric drive unit is supplied to the transmission mechanism, the open position maintaining unit allows downward movement of the transmission mechanism, so that the railway vehicle door can be changed from an open state to a pressed state. [Effects of the Invention]

[0024] According to the present invention, as described above, it is possible to prevent the structure inside the vehicle from becoming complicated in order to hold down the door portion for the vehicle. [Brief explanation of the drawings]

[0025] [Figure 1]1 is a perspective view showing a railway vehicle provided with a door holding device according to a first embodiment. [Figure 2] 1 is a schematic side view of a door holding device according to a first embodiment, seen from the opening and closing direction of a door portion. [Figure 3] FIG. 4 is a perspective view for explaining the configuration of a link portion and a holding portion. [Figure 4] FIG. 2 is an exploded perspective view illustrating the configuration of a motor. [Figure 5] FIG. 10 is a schematic diagram for explaining the arrangement of the link portion in the open position. [Figure 6] 10A and 10B are schematic diagrams for explaining movement of a link portion from a release position to a pressing position. [Figure 7] FIG. 10 is a perspective view illustrating movement of a pin member in a holding portion. [Figure 8] FIG. 10 is a schematic diagram for explaining movement of a link portion during a power outage. [Figure 9] FIG. 10 is a schematic side view of a door holding device according to a second embodiment, as seen from the opening and closing direction of a door portion. [Figure 10] FIG. 10 is a perspective view for explaining the configuration of a holding portion in the second embodiment. [Figure 11] FIG. 10 is a perspective view for explaining the configuration of a third embodiment. [Figure 12] 10A and 10B are schematic diagrams for explaining the operation of an open position maintaining unit in the third embodiment. [Figure 13] 11 is an enlarged view of the open position maintaining portion for explaining the operation of the open position maintaining portion from the pressing position to the open position in the third embodiment. FIG. [Figure 14] 10A and 10B are schematic diagrams for explaining the operation of an open position maintaining unit in the third embodiment. [Figure 15] 10 is a schematic diagram illustrating movement of a link portion from a release position to a pressing position in a third embodiment. FIG. [Figure 16] 11 is an enlarged view of the open position maintaining portion for explaining the operation of the open position maintaining portion from the open position to the pressing position in the third embodiment. FIG. [Figure 17]10A and 10B are schematic diagrams showing an example of the arrangement of holding parts in a first modified example of the first embodiment of the present invention. [Figure 18] FIG. 10 is a schematic view showing an example of a rod portion according to a second modified example of the first embodiment of the present invention. [Figure 19] FIG. 10 is a perspective view showing an example of a pin member of a holding portion according to a third modified example of the first embodiment of the present invention. [Figure 20] FIG. 10 is a schematic diagram illustrating movement of a link portion from a release position to a pressing position according to a fourth modified example of the first embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0027] [First embodiment] The configuration of a door holding device 100 according to a first embodiment of the present invention will be described with reference to FIGS.

[0028] (Configuration of door retaining device) As shown in FIG. 1, a door holding device 100 is mounted on a railway vehicle 101. The door holding device 100 is an electric device that holds a door section 102 provided on the railway vehicle 101 outward (toward the Y2 direction). Note that FIG. 1 shows the railway vehicle 101 with the door section 102 closed, as viewed from inside the vehicle. The door section 102 is a plug-in door that opens and closes by sliding in an opening / closing direction (X direction) by a door opening / closing device 103 disposed in a transom portion above the door section 102, and is pressed toward the outside of the vehicle when closed. In the railway vehicle 101, a pair of door holding devices 100 is disposed for each door section 102. The door holding devices 100 are fixed to the body of the railway vehicle 101 by fixing frame members of the door holding devices 100. The pair of door holding devices 100 are disposed on each side of the door section 102 in the left-right direction (opening / closing direction: X direction) when the door section 102 is closed. The railcar 101 is an example of a "vehicle" in the claims.

[0029] In the following description, the left-right direction, which is the opening and closing direction of the door portion 102, is referred to as the X direction, one of the X directions is referred to as the X1 direction, and the other of the X directions is referred to as the X2 direction. The up-down direction (vertical direction) is referred to as the Z direction, one of the Z directions, the vertically upward direction, is referred to as the Z1 direction, and the other of the Z directions, the vertically downward direction, is referred to as the Z2 direction. The front-rear direction, which is a direction perpendicular to the opening-closing direction (X direction) and the up-down direction (Z direction), is referred to as the Y direction, one of the Y directions, the vehicle interior direction, is referred to as the Y1 direction, and the other of the Y directions, the vehicle exterior direction, is referred to as the Y2 direction.

[0030] As shown in FIG. 2, one door holding device 100 includes a link unit 10, a link unit 20, a motor 30, and a transmission mechanism unit 40. FIG. 2 shows one of the pair of door holding devices 100, which is located on the X2 side, as viewed from the X1 side. The link unit 10 is an example of a "first rotating member" and a "rotating member" in the claims. The link unit 20 is an example of a "second rotating member" and a "rotating member" in the claims. The motor 30 is an example of an "electric drive unit" and a "motor" in the claims.

[0031] The link unit 10 and the link unit 20 are arranged along the Z direction, which is the up-down direction. The link unit 10 is arranged on the upper side in the Z1 direction. The link unit 20 is arranged on the lower side in the Z2 direction. The transmission mechanism unit 40 transmits the driving force of the motor 30 to the link unit 10 and the link unit 20, causing the link unit 10 and the link unit 20 to rotate. When the link unit 10 and the link unit 20 rotate due to the driving force of the motor 30, they each press the door unit 102 from the inside to the outside of the railway vehicle 101. The railway vehicle 101 is provided with a packing member 104 that abuts against the peripheral edge of the door unit 102. The packing member 104 is a flexible elastic member such as rubber that deforms when pressed by the door unit 102. In the railway vehicle 101, the packing member 104 deforms to seal the peripheral edge of the door unit 102, thereby maintaining airtightness inside.

[0032] As shown in FIG. 3 , the link unit 10 rotates around a predetermined rotation axis A10, and the link unit 20 rotates around a predetermined rotation axis A20. In the first embodiment, the link unit 10 and the link unit 20 are positioned at a pressing position and an open position by rotating around the rotation axis A10 and the rotation axis A20, respectively. The pressing position is a position where the link unit 10 and the link unit 20 press the door unit 102 in the Y2 direction from the inside to the outside of the railway vehicle 101 when the link unit 10 and the link unit 20 are closed. The open position is a position where the link unit 10 and the link unit 20 no longer press the door unit 102. In the link unit 10, the rotation axis A10 is aligned with the X direction. When viewed from the X1 side, the link unit 10 rotates in the A11 direction, which is a clockwise direction around the rotation axis A10, and in the A12 direction, which is a counterclockwise direction around the rotation axis A10. Similarly, in link unit 20, rotation axis A20 is disposed along the X direction. When viewed from the X1 direction, link unit 20 rotates in direction A21, which is a clockwise direction about rotation axis A20, and in direction A22, which is a counterclockwise direction about rotation axis A20. That is, link unit 10 and link unit 20 rotate about rotation axes A10 and A20, which are parallel to each other. Note that the positions of rotation axes A10 and A20 are fixed with respect to railway vehicle 101 and do not move even when link units 10 and 20 and a motor 30 and transmission mechanism unit 40, which will be described later, are operated.

[0033] The link portions 10 and 20 have the same shape. Each of the link portions 10 and 20 is formed by combining a pair of triangular plate-like members. Rotation axes A10 and A20 are located at the center of the link portions 10 and 20, respectively. The link portions 10 and 20 also have abutment portions 11 and 21, respectively. The abutment portions 11 and 12 abut against the door portion 102 as the link portions 10 and 20 rotate. The abutment portions 11 and 12 include, for example, roller members. The abutment portion 11 is located at the tip of the link portion 10, and the roller member rotates while abutting against the door portion 102. The abutment portion 21 is similarly located at the tip of the link portion 20, and the roller member rotates while abutting against the door portion 102. The abutting portions 11 and 21 rotate about rotation axes parallel to the rotation axes A10 and A20, respectively. Furthermore, the link portion 10 is rotatably connected to the tip portion of a rod portion 43 (described later) at a base end portion 12 opposite the abutting portion 11. Similarly, the link portion 20 is rotatably connected to the tip portion of a rod portion 44 (described later) at a base end portion 22 opposite the abutting portion 21. The rotation axes of the base end portions 12 and 22 are parallel to the rotation axes A10 and A20, respectively.

[0034] 2, the motor 30 is a rotary electric motor. The motor 30 is, for example, a brushless DC motor. In the first embodiment, the motor 30 supplies a driving force for electrically driving the link unit 10 and the link unit 20 to rotate together between the pressing position and the release position.

[0035] As shown in FIG. 4, for example, the motor 30 includes an output shaft 31, a rotor 32, a stator 33, a winding section 34, and an encoder 35. The output shaft 31 is connected to the rotor 32. The rotor 32 is configured to be rotatable relative to the stator 33, and a permanent magnet is fixed to its surface. The stator 33 is provided with a winding section 34. In the motor 30, a driving current is applied from a control unit 70 (see FIG. 1) to the winding section 34, thereby generating a force in the stator 33 for rotating the rotor 32. As the rotor 32 rotates, the output shaft 31 connected to the rotor 32 rotates integrally with the rotor 32. The encoder 35 outputs a signal indicating the rotation of the output shaft 31 to the control unit 70. The motor 30 is disposed such that the output shaft 31 extends along the X direction. Furthermore, as shown in FIG. 2, in the first embodiment, the motor 30 is disposed between a link section 10 and a link section 20 that are disposed along the vertical direction (Z direction) relative to each other. The output shaft 31 is an example of the "motor rotating shaft" in the claims.

[0036] As shown in Fig. 2, the transmission mechanism 40 includes a pinion 41, a rack 42, a rod 43, and a rod 44. The transmission mechanism 40 transmits the driving force of the motor 30 to the link units 10 and 20. Specifically, the transmission mechanism 40 transmits the driving force of the rotational movement of the output shaft 31 of one motor 30, thereby causing the link units 10 and 20 to rotate in conjunction with each other. The rod units 43 and 44 are examples of a "first rod unit" and a "second rod unit," respectively, as defined in the claims.

[0037] The pinion unit 41 is connected to the output shaft 31 of the motor 30. Specifically, the pinion unit 41 is a pinion gear that is fixed to the output shaft 31 and rotates integrally with the output shaft 31. The motor 30 rotates the pinion unit 41 by electrically driving the output shaft 31 around the X direction as the rotation axis. The pinion unit 41 is a disk-shaped gear, and has teeth arranged on its circumferential edge that engage with the rack unit 42. The teeth of the pinion unit 41 mesh with the rack unit 42, thereby transmitting the rotational drive generated by the electric drive of the motor 30 to the rack unit 42.

[0038] The rack portion 42 has a rod shape that extends in the vertical direction (Z direction). The rack portion 42 has teeth that mate with the pinion portion 41. The teeth of the rack portion 42 are arranged side by side in the vertical direction. By mating with the pinion portion 41, the rack portion 42 moves in the vertical direction with the rotation of the motor 30. In other words, a rack-and-pinion structure is formed by the pinion portion 41 and the rack portion 42. The position of the rack portion 42 is fixed in the X direction and the Y direction, and it slides up and down in the Z direction with the rotation of the pinion portion 41.

[0039] The rod portion 43 connects the upper portion of the rack portion 42 to the link portion 10. The rod portion 44 connects the lower portion of the rack portion 42 to the link portion 20. The rod portions 43 and 44 move integrally with the rack portion 42 in the vertical direction (Z direction). Specifically, the rod portion 43 is connected to the rack portion 42 via a plate 45. The plate 45 is fixed to the upper end of the rack portion 42 and moves integrally with the rack portion 42. The rod portion 43 is attached to the plate 45 so as to be rotatable around the X direction as a rotation axis. As the rack portion 42 slides up and down, the rod portion 43 moves in the vertical direction (Z direction) while changing its rotation angle with respect to the plate 45. Similarly, the rod portion 44 is connected to the rack portion 42 via a plate 46. The plate 46 is fixed to the lower end of the rack portion 42 and moves integrally with the rack portion 42. The rod portion 44 is attached to the plate 46 so as to be rotatable around the X direction as a rotation axis. Like rod portion 43, rod portion 44 moves in the vertical direction (Z direction) while changing its rotation angle with respect to plate 46 due to the vertical sliding movement of rack portion 42. In the first embodiment, rod portion 43 and rod portion 44 have a curved bar shape. Rod portion 43 and rod portion 44 each have a curved shape that warps downward in the Z2 direction. Rod portion 43, which has a curved bar shape, is connected to plate 45 at its base end and to link portion 10 at its tip end. Similarly, rod portion 44, which has a curved bar shape, is connected to plate 46 at its base end and to link portion 20 at its tip end.

[0040] The link unit 10 rotates about the predetermined rotation axis A10 as the rod unit 43 moves due to the vertical movement of the rack unit 42. The link unit 20 rotates about the predetermined rotation axis A20 as the rod unit 44 moves due to the vertical movement of the rack unit 42. That is, the link units 10 and 20 rotate in conjunction with each other as the rack unit 42 moves in the vertical direction (Z direction). For example, when the pinion unit 41 rotates clockwise as viewed from the X1 direction due to the driving of the motor 30, the rack unit 42 slides downward in the Z2 direction. Then, the rod units 43 and 44 connected to the rack unit 42 move in such a way that they are pulled downward, causing the link units 10 and 20 to rotate clockwise together (in the A11 and A21 directions).

[0041] Note that, like the link portions 10 and 20, the rod portions 43 and 44 have the same shape. The angles of the rod portions 43 and 44 relative to the rack portion 42 are the same, and the angles of the link portions 10 and 20 relative to the rack portion 42 are also the same. Therefore, when the rack portion 42 moves, the link portions 10 and 20 rotate in unison by equal angles. That is, the link portions 10 and 20 rotate in conjunction with the movement of the rack portion 42 while maintaining equal angles relative to the door portion 102. Therefore, when the motor 30 rotates the link portions 10 and 20 from the open position to the pressing position, the abutting portion 11 of the link portion 10 and the abutting portion 21 of the link portion 20 press the door portion 102 while aligning their positions in the Y direction, which is the direction in which the door portion 102 is pressed.

[0042] As shown in FIG. 3, the door holding device 100 includes a holding unit 50 and a holding unit 60. The holding unit 50 and the holding unit 60 are disposed separately from the motor 30 and hold the link unit 10 and the link unit 20 in the holding position. Note that FIG. 3 shows the link unit 10 and the link unit 20 in the holding position and held by the holding unit 50 and the holding unit 60, respectively. Note that the holding unit 50 and the holding unit 60 are each fixed to a frame member of the door holding device 100 (not shown). Therefore, the positions of the holding units 50 and 60 are fixed regardless of the rotation of the motor 30, the movement of the rack unit 42, and the movement of the rod units 43 and 44.

[0043] The holding unit 50 and the holding unit 60 include a pin member 51 and a pin member 61, respectively. The pin member 51 and the pin member 61 are rod-shaped members extending along the X direction, which is parallel to the rotation axis A10 and the rotation axis A20. The pin member 51 abuts against the link unit 10 to hold the link unit 10 in the pressing position. When the link unit 10 is placed in the pressing position, the pin member 51 abuts against a portion of the link unit 10 between the position (center portion) of the rotation axis A10 and the abutment portion 11 (from above in the Z1 direction). That is, the pin member 51 abuts against the link unit 10 so as to prevent the link unit 10, when placed in the pressing position, from rotating toward the A11 direction about the rotation axis A10. Like the pin member 51, the pin member 61 abuts against the link unit 20 to hold the link unit 20 in the pressing position. When the link part 20 is in the pressing position, the pin member 61 abuts against a portion between the position (center portion) of the rotation axis A20 and the abutment portion 21 (from the upper side) in the Z1 direction. The pin member 61 abuts against the link part 20 so as to prevent the link part 20, in the pressing position, from rotating toward the A21 direction about the rotation axis A20. The A11 direction side about the rotation axis A10 and the A21 direction side about the rotation axis A20 are examples of "one side about a predetermined rotation axis" in the claims.

[0044] As shown in FIG. 1, the control unit 70 that controls the drive of the motor 30 is disposed, for example, above the door portion 102 in the closed state. The control unit 70 controls the drive of the motor 30 by outputting a drive current to the motor 30. The control unit 70 includes, for example, a microcomputer (microcontroller) including a CPU (Central Processing Unit). The control unit 70 is also configured to be able to communicate with a vehicle control device (not shown). Each control unit 70 controls the drive of the motor 30 to hold the door portion 102 based on an input signal from the vehicle control device. The control unit 70 is disposed in common for the pair of door holding devices 100.

[0045] (Door holding action) Next, the pressing operation of the link unit 10 and the link unit 20 on the door unit 102 will be described with reference to Figures 5 and 6. The link unit 10 and the link unit 20 move from the open position to the pressing position by the driving force of the motor 30, and when placed in the pressing position, press the door unit 102 for the railway vehicle 101 outward. The control unit 70 controls the driving of the motor 30 to press the door unit 102 outward from the railway vehicle 101 when the door unit 102 of the railway vehicle 101 is closed. In the following explanation, the operation of the link unit 10 will be explained using the drawings. The operation of the link unit 20 is similar to that of the link unit 10, so its explanation will be omitted.

[0046] As shown in FIG. 5, while the door opening / closing device 103 is opening and closing the door section 102, the link section 10 is positioned in the open position. In the open position, the link section 10 is positioned away from the door section 102. In addition, in the open position, the link section 10 is positioned at an angle obtained by rotating the link section 10 at a predetermined angle in the A12 direction with respect to a line perpendicular to the surface of the door section 102. Note that the "positioning angle" here refers to the angle formed by a line connecting the position of the rotation center of the rotation axis A10 of the link section 10 and the tip of the abutting portion 11 with respect to a line perpendicular to the surface of the door section 102 on the Y1 direction side. In other words, the positioning angle of the line connecting the position of the rotation axis A10 of the link section 10 and the tip of the abutting portion 11 at an orthogonal position perpendicular to the surface of the door section 102 is set to 0 degrees, and the angle represents the magnitude of the angle rotated in the A11 direction or the A12 direction around the rotation axis A10. Furthermore, when the link unit 10 is in the open position, it abuts against the pin member 51 so as to restrict rotation in the A12 direction. Specifically, when the link unit 10 is in the open position, the pin member 51 abuts from above (the Z1 direction) against a portion between the position (central portion) of the rotation axis A10 and the base end portion 12. Similarly, when the link unit 20 is in the open position, the pin member 61 abuts against the portion so as to restrict rotation in the A22 direction.

[0047] As shown in FIG. 6, a drive signal from the control unit 70 initiates the operation of pressing down the door unit 102. The motor 30 rotates the link unit 10 in the direction A11, which is one side, about a predetermined rotation axis A10, thereby moving the motor 30 from the open position to the pressing position. When moving from the open position to the pressing position, for example, the motor 30 is rotated clockwise as viewed from the X1 direction, causing the rack unit 42 to move downward (toward the Z2 direction). This causes the rod unit 43 to move downward, thereby rotating the link unit 10 in the direction A11. The control unit 70 pre-stores a control variable corresponding to the rotation angle of the motor 30 from the open position to the pressing position. The control unit 70 outputs a drive current to the winding unit 34 of the motor 30 to rotate the motor 30 by a preset and stored rotation angle. For example, the control unit 70 controls the rotation of the motor 30 by feedback control based on a signal from the encoder 35.

[0048] In detail, by rotating the link unit 10 in the A11 direction from the open position, the abutment portion 11 of the link unit 10 abuts against the surface of the door unit 102. By further rotating the link unit 10 in the A11 direction, the door unit 102 is pressed by the link unit 10 and moves toward the Y2 direction, which is the outside of the railway vehicle 101. Then, by further rotating the link unit 10 in the A11 direction, the door unit 102 abuts against the packing member 104. By further rotating the link unit 10 in the A11 direction by the motor 30, it is rotated to an orthogonal position where the arrangement angle is 0 degrees. At the orthogonal position, the door unit 102 is positioned in a position where it is pressed most outward (toward the Y2 direction). In the first embodiment, the motor 30 rotates the link unit 10 beyond the orthogonal position where the arrangement angle is 0 degrees, thereby positioning it in the pressing position.

[0049] When the link unit 10 is disposed in the pressing position, the door unit 102 moves in the Y1 direction inward from the orthogonal position, but the packing member 104 is pressed in the Y direction. Therefore, a force in the Y1 direction acts on the door unit 102 due to the elastic force of the packing member 104, pushing it back toward the inside of the railway vehicle 101. Because the link unit 10 is disposed in the pressing position beyond the orthogonal position, when a force in the Y1 direction is applied from the door unit 102, the link unit 10 tries to rotate in the A11 direction. In contrast, in the first embodiment, the pin member 51 is disposed to suppress rotation in the A11 direction, so the link unit 10 is held in the pressing position. Then, because the link unit 10 is held in the pressing position by the pin member 51 of the holder 50 against the force pushing the door unit 102 back in the Y1 direction, airtightness of the door unit 102 is maintained.

[0050] Furthermore, when the link unit 10 is in the pressing position, the control unit 70 stops the power supplied to the motor 30. That is, after the link unit 10 is moved to the pressing position by the electric drive, when the link unit 10 is in the pressing position, the holding unit 50, which is arranged separately from the motor 30 that supplies the driving force by the electric drive, holds the link unit 10 in the pressing position without supplying the driving force by the electric drive. The movement of the link unit 20 from the open position to the pressing position is the same as that of the link unit 10. That is, the link unit 20 is rotated in the A21 direction beyond the orthogonal position, similar to the link unit 10, by the movement of the rack unit 42, which is common to the link unit 10. Note that when the airtightness of the door unit 102 is to be released, the control unit 70 rotates the link units 10 and 20 in the opposite directions, A12 and A22, respectively, from the pressing position to the open position.

[0051] (Operation during power outage) Next, with reference to Figures 1, 7, and 8, a description will be given of how to release the state in which the door section 102 is held down when the supply of power is stopped. If the supply of power is stopped when the link sections 10 and 20 are in the holding position, the supply of power to the motor 30 is stopped, and therefore the link sections 10 and 20 cannot be rotated by electric drive. In the first embodiment, the door holding device 100 is configured so that the link sections 10 and 20 can be manually moved to the open position (a position separated from the door section 102) even when the supply of power is stopped when the link sections 10 and 20 are in the holding position.

[0052] As shown in FIG. 1 , the door holding device 100 of the first embodiment includes a handle member 80. The handle member 80 receives manual operation for opening and closing the door section 102 during a power outage or the like in the railway vehicle 101. In addition, the handle member 80 receives operation for moving the pin members 51 and 61. A wire 81 is connected to the handle member 80. One end of the wire 81 is connected to the handle member 80. The other end of the wire 81 is connected to the holding unit 50 and the holding unit 60 of the door holding device 100. In the door holding device 100 of the first embodiment, the pin member 51 of the holding unit 50 and the pin member 61 of the holding unit 60 are configured to be changeable between a holding position in which the link unit 10 and the link unit 20 are held, and a free-wheeling position in which the link unit 10 and the link unit 20 are not held. In the following explanation, the operation of the link portion 10 and the holding portion 50 will be explained using the drawings, and the operation of the link portion 20 and the holding portion 60 will not be explained as they have the same configuration as the link portion 10 and the holding portion 50, respectively.

[0053] As shown in FIG. 7 , in the first embodiment, the pin member 51 is configured to be changeable between a holding position and an idling position by moving along the X direction, which is a direction parallel to the rotation axis A10. In the holding position, the pin member 51 is positioned in a state where it protrudes in the X1 direction and abuts against the link portion 10, which is positioned in the holding position. On the other hand, in the idling position, the pin member 51 is positioned in a state where it retracts in the X2 direction and does not abut against the link portion 10. In other words, when the pin member 51 is positioned in the idling position, the link portion 10 is not held in the holding position and idling. In the first embodiment, when opening or closing the door portion 102 during a power outage, the handle member 80 is positioned to move the pin member 51 from the holding position to the idling position so as to release the door portion 102 from being pressed against the outside of the railway vehicle 101. The pin member 51 moves from the holding position to the idling position when an operating force is applied to the handle member 80.

[0054] Specifically, when an operating force is applied to the handle member 80 to move the pin member 51, a force is applied to the wire 81 connected to the holding unit 50. As a result, the pin member 51 connected to the wire 81 moves from the holding position to the idling position. In other words, when the handle member 80 is operated and the wire 81 is pulled, the pin member 51 moves in the X2 direction to move to the idling position. Note that the pin member 61 of the holding unit 60 disposed below is also configured to move in the X2 direction from the holding position to the idling position when an operating force is applied to the handle member 80.

[0055] As shown in FIG. 8 , when the link unit 10 is in the pressing position, if an operating force is applied to the handle member 80 and the pin members 51 and 61 of the holders 50 and 60 move to the idling position, the elastic force of the pressed packing member 104 and the gravity acting on the rack unit 42 cause the link unit 10 to rotate in the A11 direction, the link unit 20 to rotate in the A21 direction, and the rack unit 42 to move downward in the Z2 direction. The link unit 10 rotates in the A11 direction so as to overlap with the pin member 51 as viewed from the X direction. Then, as the link unit 10 rotates in the A11 direction, the door unit 102 and the packing member 104 separate. As the door unit 102 and the packing member 104 separate, the elastic force from the packing member 104 is lost. However, the rack unit 42 continues to move downward due to the gravity acting on the rack unit 42, causing the link unit 10 to further rotate in the A11 direction. During a power outage, the link unit 10 is placed in an open position where it is no longer pressing down on the door unit 102. Even in the open position during a power outage, the link unit 10 is placed at a position spaced apart from the door unit 102. In the first embodiment, when the link unit 10 is placed at the open position during a power outage, which is placed by operating the handle member 80, the link unit 10 is placed at a position overlapping the pin member 51 when viewed from the X direction, which is the direction in which the pin member 51 extends.

[0056] Here, the door holding device 100 is provided with a pin member 53, which is a fixed pin, separate from the pin member 51 of the holding unit 50. For example, when the link unit 10 is disposed in the open position during a power outage, the pin member 53 abuts against a portion between the position (center portion) of the rotation axis A10 of the link unit 10 and the base end portion 12 from the Z2 direction side, which is below the link unit 10. That is, the pin member 53 suppresses rotation of the link unit 10 disposed in the open position in the A11 direction during a power outage. Like the pin member 51, the pin member 53 is a rod-shaped member extending along the X direction. The pin member 53 is fixed to, for example, a frame member of the door holding device 100 (not shown). Unlike the pin member 51, the pin member 53 is configured not to move in the X direction. This allows the link unit 10 to be held in the open position during a power outage. Note that the link unit 10 abuts against the pin member 53, thereby restricting its rotation in the A11 direction, and thus stopping the movement of the rack unit 42. Note that when the link unit 10 is disposed in the open position during a power outage, the link unit 10 and the pin member 51 of the holding unit 50, which is disposed in the idling position, are disposed so as to overlap each other as viewed from the X direction. Note that the pin member 53 is disposed in a position where it does not abut against the link unit 10 when the link unit 10 rotates from the open position (open position in FIG. 5 ) to the holding position due to the driving force of the motor 30. Similarly, the link unit 20 is also restricted from rotating in the A21 direction about the rotation axis A20 by abutting against a fixing pin (not shown). Note that a fixing pin that holds the link unit 20 in the open position during a power outage may not be disposed on the link unit 20 side.

[0057] Here, when the power outage is resolved, the door holding device 100 changes the angle of the link units 10 and 20 from a state in which they are disposed in the open position during the power outage (the open position state during the power outage in FIG. 8) to a state in which they are disposed in the normal open position (the normal open position state in FIG. 6) by the driving force of the motor 30. In other words, when the power outage is resolved, the door holding device 100 again moves the link units 10 and 20 to the normal open position shown in FIG. 6 by the electric drive of the motor 30. Thereafter, the door holding device 100 rotates the link units 10 and 20 between the normal open position and the holding position as a normal operation.

[0058] Therefore, as shown in FIG. 7 , the holding portion 50 of the pin member 51 includes a biasing member 52. In the first embodiment, the biasing member 52 biases the pin member 51 from the idling position toward the holding position by elastic force. When the operating force on the handle member 80 is released, the biasing member 52 biases the pin member 51 in the X1 direction to return to the holding position. The biasing member 52 includes, for example, a coil spring. When the power outage is resolved and the operating force on the handle member 80 is released, the control unit 70 causes the motor 30 to rotate the link unit 10 in the A12 direction from the open position during the power outage to the normal open position. When the link unit 10 is positioned on the A11 side of the holding position, the link unit 10 and the pin member 51 are positioned overlapping each other as viewed from the X direction. Therefore, even when biased in the X1 direction by the biasing member 52, the pin member 51 abuts against the X2 side of the link unit 10 and does not move to the holding position, and the link unit 10 becomes rotatable. When the link portion 10 has rotated to the holding position, the pin member 51 and the link portion 10 are arranged so as not to overlap each other when viewed from the X direction, and the pin member 51 returns to the holding position due to the biasing force of the biasing member 52. As a result, the door holding device 100 operates in the same manner as before the power outage.

[0059] [Effects of the first embodiment] In the first embodiment, the following effects can be obtained.

[0060] As described above, the first embodiment includes a motor 30 (electric drive unit) that supplies a drive force for electrically rotating the link units 10 and 20 (rotating members) between the pressing position and the release position. As a result, the motor 30 rotates the link units 10 and 20 by electric drive, and the link units 10 and 20 can be rotated without arranging piping for supplying a fluid such as compressed air. Therefore, unlike when piping is arranged for supplying a fluid, the internal structure of the railway vehicle 101 (vehicle) can be prevented from becoming complicated. As a result, the internal structure of the railway vehicle 101 can be prevented from becoming complicated in order to press the door unit 102 for the railway vehicle 101.

[0061] Furthermore, when a cylinder device using a fluid such as compressed air is used to hold the door portion 102 of the railway vehicle 101 (car), regular maintenance and inspection of the degree of sealing of the fluid is required to ensure normal operation of the cylinder device. Maintenance and inspection of a cylinder device using a fluid requires checking the inside of the device, and each time maintenance and inspection is performed, the amount of movement of the cylinder device must be adjusted in accordance with the rotation of the link portions 10 and 20 (rotating members). This increases the amount of work required for maintenance and inspection. In contrast, in the first embodiment, the link portions 10 and 20 are rotated by electric drive using the motor 30 (electric drive portion), so the amount of work required for maintenance and inspection can be reduced compared to when a cylinder device using a fluid is used.

[0062] In the first embodiment, as described above, the door holding device 100 includes the holding units 50 and 60 that hold the link units 10 and 20 (rotating members) in the holding positions. As a result, the holding units 50 and 60 hold the link units 10 and 20 in the holding positions against external forces generated during travel. This reduces the power generated by the motor 30 (electric drive unit) to resist external forces generated during travel, allowing the motor 30 to be made smaller. As a result, the internal structure of the railway vehicle 101 (car) is prevented from becoming more complex in order to hold the door unit 102 for the railway vehicle 101. Furthermore, even when the supply of power from the motor 30 is stopped, the holding units 50 and 60 can hold the link units 10 and 20 in the holding positions. Therefore, it is not necessary to continue supplying power from the motor 30 to hold the link units 10 and 20 in the holding positions, thereby preventing an increase in the amount of power consumed by the motor 30. Furthermore, since the holding portions 50 and 60 can hold the link portions 10 and 20 in the holding position, the maximum output of the motor 30 can be set regardless of the magnitude of the external force generated during driving, thereby preventing the motor 30 from becoming larger.

[0063] In the first embodiment, as described above, the door holding device 100 includes a transmission mechanism 40 that transmits the driving force of the motor 30 (electric drive unit) to the link units 10 and 20 (rotating members). The holding units 50 and 60 include pin members 51 and 61 that hold the link units 10 and 20 in the holding position by abutting against the link units 10 and 20, which are at least one of the link units 10 and 20 and the transmission mechanism 40. As a result, the pin members 51 and 61 can hold the link units 10 and 20 in the holding position by abutting against the link units 10 and 20, which are at least one of the link units 10 and 20 and the transmission mechanism 40, so the link units 10 and 20 can be easily held by the pin members 51 and 61, which have a relatively simple configuration.

[0064] In the first embodiment, as described above, the link unit 10 (rotating member) includes an abutting portion 11 that abuts against the door unit 102, and is positioned at the pressing position by rotating toward one side (the A11 direction side) about the predetermined rotation axis A10. The link unit 20 (rotating member) includes an abutting portion 21 that abuts against the door unit 102, and is positioned at the pressing position by rotating toward one side (the A21 direction side) about the predetermined rotation axis A20. The motor 30 (electric drive unit) positions the link units 10 and 20 at the pressing position by rotating them beyond the orthogonal position where the straight lines connecting the predetermined rotation axes A10 and A20 of the link units 10 and 20 with the tips of the abutting portions 11 and 12 are perpendicular to the surface of the door unit 102. The pin members 51 and 61 abut against at least one of the link units 10 and 20 and the transmission mechanism unit 40, that is, the link units 10 and 20, so as to prevent the link units 10 and 20, which are arranged in the pressing position, from rotating toward one side (the A11 direction side and the A21 direction side) about the predetermined rotation axes A10 and A20. Here, the link units 10 and 20 are arranged in the pressing position beyond the orthogonal position by rotating toward one side (the A11 direction side and the A21 direction side) about the predetermined rotation axes A10 and A20, so that when a force is applied to the door unit 102 from outside the railway vehicle 101 (vehicle), a force is applied that rotates the link units 10 and 20 toward the A11 direction side and the A21 direction side. In contrast to this, in the first embodiment, the pin members 51 and 61 are configured to abut against at least one of the link sections 10 and 20 and the transmission mechanism section 40, so as to prevent the link sections 10 and 20, when positioned in the holding position, from rotating toward the A11 direction and the A21 direction.Therefore, even if force is applied to the door section 102 from outside the railway vehicle 101, the pin members 51 and 61 can hold the link sections 10 and 20 in the holding position.Furthermore, since link sections 10 and 20 are positioned at the pressing position by rotating in the A11 direction and the A21 direction, and pin members 51 and 61 abut to prevent link sections 10 and 20 from rotating toward the A11 direction and the A21 direction, it is possible to prevent pin members 51 and 61 from physically interfering with link sections 10 and 20 when link sections 10 and 20 move between the pressing position and the release position. Therefore, link sections 10 and 20 can be moved between the pressing position and the release position without providing a configuration for moving pin members 51 and 61, and it is possible to prevent the device configuration from becoming complicated due to a configuration for moving pin members 51 and 61.

[0065] In the first embodiment, as described above, the pin members 51 and 61 are arranged to extend in a direction parallel to the predetermined rotation axes A10 and A20, and are configured to be able to change between a holding position in which the link portions 10 and 20 (rotating members) are held and an idling position in which the link portions 10 and 20 are not held by moving in a direction parallel to the predetermined rotation axes A10 and A20. As the pin members 51 and 61 are configured to be able to change between the holding position and the idling position, by placing the pin members 51 and 61 in the idling position, it is possible to prevent the pin members 51 and 61 from physically interfering with the rotation of the link portions 10 and 20. As a result, by moving the pin members 51 and 61 to the idling position, it is possible to easily expand the range of rotation of the link portions 10 and 20.

[0066] Furthermore, when using a cylinder device using a fluid such as compressed air, the operating range (stroke) is mechanically limited, and stable positioning is only achieved at both ends of the operating range (the extended position on the pressure side and the retracted position on the atmospheric pressure side). Therefore, the operating range of the cylinder device may limit the layout of the device configuration. In contrast, in the first embodiment, the link units 10 and 20 are rotated between the pressing position and the release position by the motor 30, which performs rotational motion and thus limits the operating range relatively little. This prevents limitations on the layout of the device configuration, further reducing the complexity of the device configuration. Furthermore, because the motor 30, which performs rotational motion, rotates the link units 10 and 20 between the pressing position and the release position, unlike a cylinder device, the rotational range of the link units 10 and 20 can be effectively and easily expanded by moving the pin member 51 from the pressing position beyond the orthogonal position to the idling position.

[0067] In the first embodiment, as described above, the door holding device 100 includes the handle member 80 for moving the pin members 51 and 61. The pin members 51 and 61 move from the holding position to the idling position when an operating force is applied to the handle member 80. As a result, the pin members 51 and 61 can be moved from the holding position to the idling position by applying an operating force to the handle member 80, so that the range of rotation of the link portions 10 and 20 (rotating members) can be easily expanded even when the supply of power is stopped during a power outage or other such event.

[0068] In the first embodiment, as described above, the door holding device 100 includes a link unit 10 (first rotating member) and a link unit 20 (second rotating member) that are arranged along the vertical direction and each press the door unit 102 from the inside to the outside of the railway vehicle 101 (vehicle). The motor 30 (electric drive unit) supplies a driving force for commonly rotating the link unit 10 and the link unit 20. This allows the link unit 10 and the link unit 20, which are arranged along the vertical direction, to be rotated by the common motor 30. This makes it possible to reduce the complexity of the device configuration and the control process for rotating the link unit 10 and the link unit 20 compared to when the link unit 10 and the link unit 20 are rotated by electric drive units that are separately arranged.

[0069] In the first embodiment, as described above, the door holding device 100 includes a transmission mechanism 40 that transmits driving force from the motor 30 (electric drive unit) to the link units 10 and 20 (rotating members). The door holding device 100 includes the motor 30 that rotates the output shaft 31 (motor rotation shaft) by electric drive. The transmission mechanism 40 includes a pinion unit 41 connected to the output shaft 31. The transmission mechanism 40 also includes a rack unit 42 that has a rod shape extending in the vertical direction and moves in the vertical direction as the motor 30 rotates by engaging with the pinion unit 41. The link unit 10 (first rotating member) and the link unit 20 (second rotating member) rotate in conjunction with the vertical movement of the rack unit 42. As a result, the rack-and-pinion structure formed by the pinion unit 41 and the rack unit 42 allows the link units 10 and 20 to easily rotate in conjunction with each other. Therefore, it is possible to easily prevent the device configuration from becoming complicated, and also to easily simplify the control process for rotating the link portion 10 and the link portion 20.

[0070] In the first embodiment, as described above, the transmission mechanism 40 includes a rod-shaped rod portion 43 (first rod portion) that connects the upper portion of the rack portion 42 and the link portion 10 (first rotating member), and a rod-shaped rod portion 44 (second rod portion) that connects the lower portion of the rack portion 42 and the link portion 20 (second rotating member). The link portion 10 rotates about a predetermined rotation axis A10 as the rod portion 43 moves with the up-down movement of the rack portion 42. The link portion 20 rotates about a predetermined rotation axis A20 as the rod portion 44 moves with the up-down movement of the rack portion 42. This allows the rod portion 43 to transmit the up-down movement of the rack portion 42 to the link portion 10, and the rod portion 44 to transmit the up-down movement of the rack portion 42 to the link portion 20. Therefore, compared to when the vertical movement of rack portion 42 is transmitted by gears or the like, by changing the shapes of rod portions 43 and 44, the degree of freedom in the arrangement of rack portion 42 and link portions 10 and 20 can be easily improved.

[0071] In the first embodiment, as described above, the rod portion 43 (first rod portion) and the rod portion 44 (second rod portion) have a curved rod shape. As a result, by curving the rod portions 43 and 44 so as to avoid surrounding members, the surrounding members can be arranged close to each other while suppressing physical interference with the rod portions 43 and 44, and therefore the door holding device 100 can be prevented from becoming large.

[0072] In the first embodiment, as described above, the motor 30 (electric drive unit) is disposed between the link unit 10 (first rotating member) and the link unit 20 (second rotating member) which are disposed along the up-down direction. As a result, since the motor 30 is disposed between the link unit 10 and the link unit 20, it is possible to prevent the size of the door holding device 100 from increasing in the up-down direction.

[0073] In the first embodiment, as described above, the door holding device 100 includes the biasing member 52 that biases the pin member 51 from the idling position toward the holding position by elastic force. This allows the pin member 51, which is positioned in the idling position, to be easily positioned in the holding position by the biasing member 52. Therefore, even when the pin member 51 is temporarily moved from the holding position to the idling position, the pin member 51 can be easily moved to the holding position by the biasing member 52.

[0074] In the first embodiment, as described above, the link units 10 and 20 (rotating members) hold the door unit 102 for the railway vehicle 101 when they are arranged in the holding position. As a result, the link units 10 and 20 holding the door unit 102 of the railway vehicle 101 can be rotated by the motor 30 (electric drive unit) driven by electric power, so that the link units 10 and 20 can be rotated by electric power without arranging piping for supplying fluid such as compressed air in the railway vehicle 101. Therefore, it is possible to prevent the internal structure of the railway vehicle 101 from becoming complicated in order to hold the door unit 102 for the railway vehicle 101.

[0075] [Second embodiment] Next, the configuration of a door holding device 200 according to a second embodiment will be described with reference to Figures 9 and 10. In the second embodiment, the link portion 10 and the link portion 20 are positioned in the holding position by rotating so as not to exceed the orthogonal position. Note that the same components as those in the first embodiment are given the same reference numerals and their description will be omitted.

[0076] (Configuration of the door holding device according to the second embodiment) As shown in Fig. 9, the door holding device 200 according to the second embodiment includes a link unit 210, a link unit 220, a motor 30, a transmission mechanism unit 240, and a holding unit 250. Similar to the door holding device 100 of the first embodiment, the door holding device 200 is an electrically driven device that holds outward a door unit 102 provided on a railway vehicle 101 (see Fig. 1), and a pair of door holding devices 200 are arranged for one door unit 102. The link unit 210 is an example of a "first rotating member" and a "rotating member" in the claims. The link unit 220 is an example of a "second rotating member" and a "rotating member" in the claims.

[0077] Like the link units 10 and 20 of the first embodiment, the link units 210 and 220 are respectively rotated about rotation axes A10 and A20 along the X direction to be positioned at a pressing position where the closed door unit 102 is pressed in the Y2 direction from the inside to the outside of the railway vehicle 101, and at an open position where the pressing state of the door unit 102 is released. The link unit 210 includes an abutting portion 211 that abuts against the door unit 102, and is positioned at the pressing position by rotating from the open position toward one side (A12 direction) about the predetermined rotation axis A10. The link unit 220 includes an abutting portion 221 that abuts against the door unit 102, and is positioned at the pressing position by rotating from the open position toward one side (A22 direction) about the predetermined rotation axis A20. In the second embodiment, the rotation directions of the link units 210 and 220 between the open position and the pressing position are different from those in the first embodiment. That is, in the second embodiment, the A12 direction side about the rotation axis A10 and the A22 direction side about the rotation axis A20 are examples of "one side about a predetermined rotation axis" in the claims. Also, like the link units 10 and 20 of the first embodiment, the link units 210 and 220 are arranged along the Z direction, which is the up-down direction. The link unit 210 is arranged on the upper side in the Z1 direction, and the link unit 220 is arranged on the lower side in the Z2 direction.

[0078] Similar to the transmission mechanism 40 of the first embodiment, the transmission mechanism 240 transmits the driving force generated by the rotation of the output shaft 31 of one motor 30, thereby rotating the link portion 210 and the link portion 220 in conjunction with each other. The transmission mechanism 240 includes a pinion portion 241, a rack portion 242, a rod portion 243, and a rod portion 244. The rod portion 243 and the rod portion 244 are examples of the "first rod portion" and the "second rod portion" in the claims, respectively.

[0079] The pinion portion 241 is connected to the output shaft 31 of the motor 30, similar to the pinion portion 41 of the first embodiment. The rack portion 242 has a rod shape extending in the vertical direction (Z direction), similar to the rack portion 42 of the first embodiment. By fitting with the pinion portion 241, the rack portion 242 slides vertically in response to the rotation of the motor 30. The rod portion 243 is attached to the rack portion 242 so as to be rotatable about the X direction as a rotation axis, similar to the rod portion 43 of the first embodiment, and connects the upper portion of the rack portion 242 to the link portion 210. The rod portion 244 is attached to the rack portion 242 so as to be rotatable about the X direction as a rotation axis, similar to the rod portion 44 of the first embodiment, and connects the lower portion of the rack portion 242 to the link portion 220. In the second embodiment, the rod portions 243 and 244 have a linear rod shape. As in the first embodiment, the link portion 210 rotates about a predetermined rotation axis A10 as the rod portion 243 moves due to the vertical movement of the rack portion 242. The link portion 220 rotates about a predetermined rotation axis A20 as the rod portion 244 moves due to the vertical movement of the rack portion 242.

[0080] Note that the link portion 210 and the link portion 220 have the same shape, and the rod portion 243 and the rod portion 244 have the same shape. However, unlike the first embodiment, the angle of the rod portion 243 relative to the rack portion 242 and the angle of the rod portion 244 relative to the rack portion 242 are arranged so that they are inclined in opposite directions. In this case, too, the link portion 210 and the link portion 220 are arranged so that their arrangement angles relative to the door portion 102 are the same when they are arranged in the pressing position. In other words, when they are arranged in the pressing position, the force that the link portion 210 applies to the door portion 102 and the force that the link portion 220 applies to the door portion 102 are equal in magnitude.

[0081] The holding unit 250 is disposed separately from the motor 30 and holds the link units 210 and 220 in the pressing position. The holding unit 250 has a rod-shaped pin member 251 that abuts against the link unit 210 to hold the link units 210 and 220 in the pressing position. Note that in the second embodiment, no holding unit that abuts against the link unit 220 is disposed, and only the holding unit 250 that abuts against and holds the link unit 210 is disposed. In this case, too, the link units 210 and 220 rotate in conjunction with each other, so that the link unit 220 is also held by the holding unit 250 holding the link unit 210. Similar to the pin member 51 in the first embodiment, the pin member 251 is a rod-shaped member that is disposed to extend along the X direction, which is a direction parallel to the rotation axis A10 and the rotation axis A20. Like the pin member 51 of the first embodiment, the pin member 251 is configured to be able to change between a holding position and an idling position by moving along the X direction, which is a direction parallel to the rotation axis A10. As in the first embodiment, when the pin member 251 is positioned at the holding position on the X1 direction side, the link portion 210 abuts against the pin member 251 and is held at the pressing position. When the pin member 251 is positioned at the idling position on the X2 direction side, the link portion 210 rotates without abutting against the pin member 251. Note that, although the second embodiment illustrates an example in which the holding portion 250 abutting against the link portion 210 is disposed, a holding portion abutting against the link portion 220 may also be disposed. Furthermore, both a holding portion abutting against the link portion 210 and a holding portion abutting against the link portion 220 may also be disposed. In this case, the load acting on each holding portion is distributed, thereby reducing the load acting on each holding portion, and therefore each holding portion can be made smaller.

[0082] As shown in FIG. 10 , in the second embodiment, the holding unit 250 has a pin driving unit 254. The pin driving unit 254 moves the pin member 251 from the holding position to the idling position. The pin driving unit 254 includes, for example, a solenoid actuator. The pin driving unit 254 is operated by a control signal from the control unit 70 (see FIG. 1 ). The pin driving unit 254 moves the pin member 251 from the holding position to the idling position by moving it in the X2 direction using electromagnetic force. The pin driving unit 254 also moves the pin member 251 from the idling position to the holding position. The pin driving unit 254 includes, for example, a biasing member such as a coil spring that biases the pin member 251 in the X1 direction from the idling position toward the holding position using elastic force. The pin driving unit 254 moves the pin member 251 to the idling position using a driving force generated by an electromagnetic force while resisting the elastic force of the biasing member. When the driving force is released, the pin member 251 moves from the idling position to the holding position due to the elastic force of the biasing member. In the second embodiment, the holding unit 250 is configured so that the position of the pin member 251 can be changed by control processing of the control unit 70.

[0083] (Door holding action) 9, in the second embodiment, the motor 30 places the link portions 210 and 220 in the pressing position by rotating the pin member 251 so as not to pass the orthogonal position while the pin driving portion 254 has moved the pin member 251 to the idling position. As in the first embodiment, the orthogonal position is a position where the placement angle is 0 degrees, and where the line connecting the position of the rotation center of the rotation axis A10 and the tip of the abutting portion 211, and the line connecting the position of the rotation center of the rotation axis A20 and the tip of the abutting portion 221, are perpendicular to the surface of the door portion 102.

[0084] Specifically, in the second embodiment, the link portions 210 and 220 are disposed at positions where, in the open position, their arrangement angle is rotated a predetermined angle in the A11 direction with respect to a line perpendicular to the surface of the door portion 102. The door holding device 200 of the second embodiment includes a pin member 253. The pin member 253 abuts from below (the Z2 direction side) against a portion between the position (central portion) of the rotation axis A10 of the link portion 210 and the base end portion 212 of the link portion 210 so as to prevent the link portion 210, disposed in the open position, from rotating in the A11 direction of the rotation axis A10. The pin member 253 is a rod-shaped member extending along the X direction, similar to the pin member 251. The pin member 253 is fixed, for example, to a frame member (not shown) of the door holding device 200. Unlike the pin member 251, the pin member 253 is configured not to move in the X direction. By disposing the pin member 253, the link portions 210 and 220 are held in the open position so as not to rotate in the A11 direction.

[0085] When the link portions 210 and 220 are rotated from the release position to the holding position, the rack portion 242 is moved upward (toward the Z1 direction) by the driving force of the motor 30, and the link portions 210 and 220 are rotated to the holding position without the arrangement angle exceeding the orthogonal position. In the second embodiment, a holding portion 250 that holds the link portion 210 is disposed midway along the path along which the link portion 210 moves from the release position to the holding position. Therefore, when the link portion 210 rotates from the release position to the holding position, the pin member 251 of the holding portion 250 is disposed in an idling position by the pin driving portion 254 so as not to come into contact with the link portion 210. Then, with the link portions 210 and 220 disposed in the holding position, the pin member 251 is moved from the idling position by the pin driving portion 254 to the holding position, thereby holding the link portions 210 and 220 at the holding position. In the second embodiment, the pin member 251 abuts from below (the Z2 direction side) against a portion between the position (center portion) of the rotation axis A10 of the link member 210 arranged in the pressing position and the base end portion 212 of the link member 210 so as to prevent the link member 210 from rotating in the A11 direction of the rotation axis A10. In the second embodiment, the arrangement angle at the pressing position is an angle that does not exceed the orthogonal position, so that when an external force is applied to the door member 102, a force that tends to rotate the link members 210 and 220 arranged in the pressing position in the A11 direction and the A21 direction is applied. Because the pin member 251 of the holder 250 prevents the link member 210 from rotating in the A11 direction, the link members 210 and 220 are held in the pressing position even when an external force is applied to the door member 102.

[0086] As shown in FIG. 10 , a wire 81 is connected to the holding portion 250, as in the first embodiment. The wire 81 is connected to the handle member 80 (see FIG. 1 ). As in the first embodiment, when an operating force is applied to the handle member 80 during a power outage or the like, the wire 81 moves the pin member 251 from the holding position to the idling position. When the pin member 251 moves to the idling position due to an operating force on the handle member 80 while the link portions 210 and 220 are disposed in the pressing position, the elastic force of the pressed packing member 104 and gravity acting on the rack portion 42 cause the link portions 210 and 220 to rotate in the directions A11 and A21 and move to the open position. In the second embodiment, the open position to which the link portions 210 and 220 are moved by the driving force of the motor 30 and the open position to which the link portions 210 and 220 are moved by operating the handle member 80 are the same position.

[0087] [Effects of the second embodiment] In the second embodiment, the following effects can be obtained.

[0088] In the second embodiment, as described above, the door holding device 200 includes a pin drive unit 254 that moves the pin member 251 from the holding position to the idling position. The link unit 210 (rotating member) includes an abutting portion 211 that abuts against the door unit 102, and is positioned at the holding position by rotating toward one side (A12 direction side) about the predetermined rotation axis A10. The link unit 220 (rotating member) includes an abutting portion 221 that abuts against the door unit 102, and is positioned at the holding position by rotating toward one side (A22 direction side) about the predetermined rotation axis A20. With the pin member 251 moved to the idling position by the pin driving unit 254, the motor 30 (electric driving unit) rotates the link portions 210 and 220 so that the straight lines connecting the predetermined rotation axes A10 and A20 of the link portions 210 and 220 with the tips of the abutting portions 211 and 221 do not cross an orthogonal position where the straight lines cross the surface of the door door 102. With the link portions 210 and 220 positioned in the pressing position, the pin member 251 is moved from the idling position to the holding position by the pin driving unit 254, thereby holding the link portions 210 and 220 in the pressing position. As a result, the link portions 210 and 220 are positioned in the pressing position without crossing the orthogonal position, and therefore the range of rotation of the link portions 210 and 220 between the open position and the pressing position can be reduced. Therefore, when the link parts 210 and 220 rotate between the release position and the pressing position, the range of rotation is small, and therefore physical interference between the link parts 210 and 220 and surrounding members can be suppressed.

[0089] [Third embodiment] Next, the configuration of a door holding device 600 according to a third embodiment will be described with reference to Figures 1, 2, and 11 to 16. The door holding device 600 according to the third embodiment includes an open position maintaining unit 691 and an open position maintaining unit 692 that maintain the transmission mechanism unit 640 in the open position even when no driving force is supplied by the motor 30. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted.

[0090] (Configuration of the door holding device according to the third embodiment) As shown in FIG. 11, the door holding device 600 according to the third embodiment includes a transmission mechanism 640 that rotates the link portion 10 from the open position toward the holding position by moving downwards using the motor 30, and an open position maintaining portion 691 and an open position maintaining portion 692 that maintain the transmission mechanism 640 in the open position even when no driving force is supplied by the motor 30.

[0091] As shown in FIG. 11, the transmission mechanism 640 in the third embodiment includes a pinion portion 41, a plate 645 fixed to the upper side of the rack portion 42, a plate 646 fixed to the lower side of the rack portion 42, a rod portion 643 connecting the upper portion of the rack portion 42 and the link portion 10 via the plate 645, and a rod portion 644 connecting the lower portion of the rack portion 42 and the link portion 20 via the plate 646.

[0092] As shown in FIG. 11 , the plate 645 is provided with a plate protrusion 645a that protrudes in the Y2 direction. Furthermore, a plate protrusion 645b that protrudes in the Z1 direction is provided on the X2-side surface of the plate protrusion 645a. Details of the plate protrusion 645b will be described later. Furthermore, a rod 643 is attached to the Y2-side of the X1-side surface of the plate protrusion 645a so as to be rotatable relative to the plate protrusion 645a around the X-direction as a rotation axis. Furthermore, the plate 645 is fixed to the upper side of the rack 42 and moves integrally with the rack 42, which moves in the up-down direction (Z-direction). Therefore, the rod 643 moves in the up-down direction (Z-direction) while changing its rotation angle relative to the plate protrusion 645a. By providing the rod 643 and the plate protrusion 645b on different surfaces, the X1-direction side and the X2-direction side, of the plate protrusion 645a, it is possible to prevent interference between the rod 643 and the plate protrusion due to movement.

[0093] The plate 645 is also provided with an abutment portion 645c that abuts against a pin member 651 (holding portion 650) extending along the Y1 direction. Specifically, the abutment portion 645c has a portion that extends in the Y2 direction at its upper end (on the Z1 direction side), and is configured so that the lower end of the portion of the abutment portion 645c extending in the Y2 direction abuts against the pin member 651, thereby restricting downward movement of the transmission mechanism portion 640 (see FIG. 15(c)).

[0094] The plate 646 is also provided with a plate protruding portion 646a protruding in the Y2 direction and a contact portion 646c that contacts the pin member 661 (holding portion 660). A plate convex portion 646b protruding in the Z1 direction is provided on the X2 direction surface of the plate protruding portion 646a, and a rod portion 644 is attached to the Y2 direction side of the X1 direction surface of the plate protruding portion 646a; however, as this has the same configuration as the upper plate 645, a description thereof will be omitted.

[0095] In the third embodiment, the rod portion 643 has a curved rod shape that is convex in the Y1 direction. The rod portion 643 is connected to the plate protrusion 645a at its base end and to the link portion 10 at its tip end. Similarly, the rod portion 644 is connected to the plate protrusion 646a at its base end and to the link portion 20 at its tip end.

[0096] (Open position maintenance part) 1, 2, and 11 to 16, the open position maintaining unit 691 will be described. Note that the open position maintaining unit 692 is similar to the open position maintaining unit 691, and therefore description thereof will be omitted.

[0097] FIG. 12 shows the positional relationship between the open position maintaining portion 691 and the plate protrusion 645b when the link portion 10 transitions from the pressing position to the normal open position. FIG. 12(a) shows the state in which the link portion 10 is in the pressing position, in which the open position maintaining portion 691 and the plate protrusion 645b are spaced apart. FIG. 13(a) is a diagram corresponding to FIG. 12(a) and is an enlarged view of the open position maintaining portion 691 and the plate protrusion 645b in the pressing position. As shown in FIG. 13(a), the open position maintaining portion 691 has a pin 691a configured to be biased in the Y1 direction by a biasing member 691c arranged on the Y2 side, and a pin 691b configured to be biased in the Y2 direction by a biasing member 691d arranged on the Y1 side, which are arranged to face each other in the Y direction. 14(a) is a diagram corresponding to FIG. 13(a) and shows the open position maintaining portion 691 and the plate protrusion 645b as viewed from the Y1 direction, and the open position maintaining portion 691 is fixed to the railway vehicle 101 (see FIGS. 1 and 2). Specifically, the open position maintaining portion 691 is attached to a wall surface 101a that is fixed to the railway vehicle 101. Note that the plate 645 is omitted from FIG. 13.

[0098] As shown in Figure 12(b), when plate 645 moves upward (in the Z1 direction) from the pressing position shown in Figure 12(a), plate protrusion 645b comes into contact with pins 691a and 691b. Figure 13(b) shows the positional relationship between plate protrusion 645b and pins 691a and 691b at this time. In Figure 13(b), when plate protrusion 645b moves further upward (in the Z1 direction) from the contact position between plate protrusion 645b and pins 691a and 691b, plate protrusion 645b is inserted into open position maintaining portion 691 against the biasing force of pins 691a and 691b.

[0099] FIG. 12(c) shows the normal open position. When the plate 645 is in the open position of the link unit 10, the plate protrusion 645b is fully inserted into the open position maintaining portion 691. FIG. 13(c) is a diagram corresponding to FIG. 12(c) and is an enlarged view of the open position maintaining portion 691 and the plate protrusion 645b in the normal open position. The surface of the plate protrusion 645b that contacts the pin 691a is recessed in the Y1 direction, and the surface that contacts the pin 691b is recessed in the Y2 direction. In the open position, a biasing force is applied to these recesses from the pins 691a and 691b. FIG. 14(b) is a diagram corresponding to FIG. 13(c) and shows the open position maintaining portion 691 and the plate protrusion 645b as viewed from the Y1 direction. As shown in Figure 14(b), the open position maintaining unit 691 is attached to a wall surface 101a that is fixed to the railway vehicle 101 (see Figures 1 and 2), and therefore the plate 645 (transmission mechanism unit 640) is fixed to the railway vehicle 101 via the open position maintaining unit 691, so that the plate 645 (transmission mechanism unit 640) is maintained in the open position.

[0100] Furthermore, in the third embodiment, when the link unit 10 is in the open position, the transmission mechanism unit 640 is maintained in the open position by an open position maintaining unit 691. Here, the open position maintaining unit 691 has a maintaining force that restricts downward movement of the transmission mechanism unit 640 due to its own weight when no driving force is supplied by the motor 30, and allows downward movement of the transmission mechanism unit 640 when driving force is supplied by the motor 30.

[0101] FIG. 15 shows the positional relationship between the open position maintaining portion 691 and the plate protrusion 645b when the link unit 10 transitions from the normal open position to the pressing position. FIG. 15(a) shows the state in which the link unit 10 is in the open position. In the open position, the plate protrusion 645b is inserted into the open position maintaining portion 691. By inserting the plate protrusion 645b into the open position maintaining portion 691, the plate 645 is maintained in the open position. Therefore, when the driving force of the motor 30 (see FIG. 11) is not supplied, downward movement of the plate 645 (transmission mechanism 640) due to its own weight is restricted. Therefore, when the link unit 10 is in the open position, even if the driving force of the motor 30 (see FIG. 11) is not supplied due to a power outage, the open position maintaining portion 691 maintains the open position without requiring any operation by the user. 16(a) is a diagram corresponding to FIG. 15(a) and is an enlarged view of the open position maintaining portion 691 and the plate protrusion 645b in the open position. As shown in FIG. 16(a), in the open position, the surface of the plate protrusion 645b that abuts against the pin 691a is recessed in the Y1 direction, and the surface of the plate protrusion 645b that abuts against the pin 691b is recessed in the Y2 direction. The biasing forces applied to these recesses by the pins 691a and 691b cause the plate protrusion 645b (plate 645) to be maintained in the open position by the open position maintaining portion 691.

[0102] 15(b), when a driving force is supplied from the motor 30 (see FIG. 11), the transmission mechanism 640 moves downward (in the Z2 direction), and the plate protrusion 645b also moves downward. FIG. 16(b) is a view corresponding to FIG. 15(b) and is an enlarged view of the open position maintaining portion 691 and the plate protrusion 645b. As shown in FIG. 16(b), the pins 691a and 691b are pushed apart along the recesses of the plate protrusion 645b as the plate protrusion 645b moves downward, so that the plate protrusion 645b is pulled out of the open position maintaining portion 691. Thereafter, as shown in FIG. 15(c), the transmission mechanism 640 moves downward (in the Z2 direction) and abuts against the pin member 651 protruding in the Y1 direction at the abutment portion 645c. This restricts the downward movement of the transmission mechanism 640 (in the Z2 direction). The link unit 10 then rotates in the A11 direction about the predetermined rotation axis A10 in conjunction with the downward (Z2) movement of the transmission mechanism 640, thereby reaching the pressing position, and the abutment portion 645c of the transmission mechanism 640 abuts against the pin member 651. Therefore, the link unit 10 is in the pressing position, and the rotation of the link unit 10, which rotates in the A11 direction about the predetermined rotation axis A10 in conjunction with the downward (Z2) movement of the transmission mechanism 640, is also restricted. Therefore, the link unit 10 is held in the pressing position. Also, FIG. 16(c) corresponds to FIG. 15(c) and is an enlarged view of the open position maintaining portion 691 and the plate protrusion 645b in the pressing position. As shown in FIG. 16(c), in the pressing position, the open position maintaining portion 691 and the plate protrusion 645b are spaced apart in the vertical direction (Z direction).

[0103] [Effects of the third embodiment] As described above, the third embodiment includes the transmission mechanism 640 that rotates the link unit 10 and the link unit 20 from the open position toward the pressing position by moving downward by the motor 30, and the open position maintaining unit 691 and the open position maintaining unit 692 that maintain the transmission mechanism 640 in the open position even when the driving force from the motor 30 is not supplied. Therefore, even when the driving force from the motor 30 is not supplied due to a power outage, the open position maintaining unit 691 and the open position maintaining unit 692 maintain the transmission mechanism 640 in the open position, so that the rotation of the link unit 10 and the link unit 20 from the open position to the pressing position caused by the downward movement of the transmission mechanism 640 due to its own weight can be suppressed. As a result, even if a power outage occurs when the door unit 102 is open, the open state of the door unit 102 (a state in which the door unit 102 is not pressed) can be maintained without the need for a user operation.

[0104] Furthermore, in the third embodiment, as described above, the open position maintaining unit 691 and the open position maintaining unit 692 have a maintaining force that restricts downward movement of the transmission mechanism unit 640 due to its own weight when no driving force is supplied by the motor 30, and allows downward movement of the transmission mechanism unit 640 when driving force is supplied by the motor 30. Therefore, the open position maintaining unit 691 and the open position maintaining unit 692 restrict downward movement of the transmission mechanism unit 640 due to its own weight when no driving force is supplied by the motor 30, so that if a power outage occurs while the transmission mechanism unit 640 is in the open position, the open state of the door unit 102 (a state in which the door unit 102 is not being pressed) can be maintained. Furthermore, when driving force of the motor 30 is supplied to the transmission mechanism unit 640, the open position maintaining unit 691 and the open position maintaining unit 692 allow downward movement of the transmission mechanism unit 640, so that the door unit 102 can be changed from an open state to a pressed state.

[0105] [Variations] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims rather than the above description of the embodiments, and further includes all modifications (variations) within the meaning and scope of the claims.

[0106] For example, in the first and second embodiments, examples have been shown in which the holding units 50, 60, and 250 that hold the link units 10, 20, 210, and 220 (rotating members) in the holding position are provided separately from the motor 30 (electric drive unit), but the present invention is not limited to this. In the present invention, the rotational position of the rotating members may be maintained by the power of the motor (electric drive unit) without providing a holding unit. Also, a brake may be provided in the electric drive unit to maintain the rotational position of the rotating members.

[0107] Furthermore, in the first embodiment, the pin member 51 that contacts the link portion 10 (first rotating member) and the pin member 61 that contacts the link portion 20 (second rotating member) are arranged, and in the second embodiment, the pin member 251 that contacts the link portion 210 (first rotating member) is arranged, and no pin member that contacts the link portion 220 (second rotating member) is arranged, but the present invention is not limited to this. In the present invention, at least one pin member (holding portion) may be arranged when multiple rotating members are rotated in conjunction with each other. Furthermore, instead of a rotating member, a pin member that contacts a transmission mechanism such as a first rod portion, a second rod portion, a rack portion, and a pinion portion may be arranged. For example, as shown in FIG. 17 , a pin member 351a in a holding unit 350a according to a first modification of the first embodiment may be abutted against the rod portion 43 (first rod portion) rather than the link portion 10 (rotating member), thereby holding the link portion 10 in the pressing position. Similarly, as shown in FIG. 17 , a pin member 351b in a holding unit 350b may be abutted against the plate 45, thereby holding the link portion 10 in the pressing position. Similarly, as shown in FIG. 17 , a pin member 351c in a holding unit 350c may be abutted against the link portion 10 from the lower side (Z2 direction side) rather than the upper side (Z1 direction side) of the link portion 10, thereby holding the link portion 10 in the pressing position. Furthermore, multiple pin members (holding units) may be arranged so as to abut against both the rotating member and the transmission mechanism. Furthermore, the holding unit may include a claw, a clamp, an engaging member, or the like, instead of a pin member. When multiple rotating members are rotated in conjunction with each other, by arranging multiple pin members (holding portions) so that they abut against each of the multiple rotating members, the force applied to the holding portions can be dispersed more effectively than when one holding portion is arranged for multiple rotating members, thereby preventing the holding portion from becoming larger. Also, by arranging the pin members (holding portions) so that they abut directly against the rotating members rather than the transmission mechanism, the rotating members can be held more reliably because no other members are involved, compared to when the holding portion is arranged at a position away from the rotating members, such as the transmission mechanism.

[0108] Furthermore, in the above-described first and second embodiments, an example was shown in which the link sections 10 and 210 (first rotating members) and the link sections 20 and 220 (second rotating members) rotate in conjunction with each other due to the operation of the motor 30 (electric drive unit), but the present invention is not limited to this. In the present invention, one or more than three rotating members may be provided. When multiple rotating members are provided, one rotating member may be rotated by one electric drive unit. In other words, multiple electric drive units may be provided individually so as to correspond to each of the multiple rotating members. Furthermore, three or more rotating members may be rotated in conjunction with each other by one electric drive unit.

[0109] In the first and second embodiments, the transmission mechanism 40 and 240 transmit the power of the motor 30 (electric drive unit) by a rack-and-pinion structure having the pinion units 41 and 241 and the rack units 42 and 242, but the present invention is not limited to this. In the present invention, the transmission mechanism may transmit the power of the electric drive unit by a ball screw, a belt and pulley, or meshing of gears. Furthermore, the electric drive unit may include an electrically driven actuator other than a motor, such as a solenoid coil.

[0110] In the first embodiment, an example was described in which curved rod-shaped rod portion 43 (first rod portion) and rod portion 44 (second rod portion) were connected to rack portion 42, and in the second embodiment, an example was described in which straight rod-shaped rod portion 243 (first rod portion) and rod portion 244 (second rod portion) were connected to rack portion 242. However, the present invention is not limited to this. In the present invention, the movement of the rack portion may be transmitted to the rotating member by a non-rod-shaped member. Also, the rotating member may be directly fitted to the rack portion to rotate. Furthermore, when arranging the first rod portion and the second rod portion, they may be linear or curved. For example, as in the rod portion 443 according to a second modified example of the first embodiment shown in FIG. 18, linear rod portions (first rod portion and second rod portion) rotatably connected to link portion 10 may be arranged. In this case, by making the first rod portion and the second rod portion linear, stress concentration can be alleviated, and the first rod portion and the second rod portion can be made smaller and lighter while maintaining the same strength. Also, the first rod portion and the second rod portion may have different shapes.

[0111] Furthermore, in the above-described first and second embodiments, an example was shown in which the link sections 10 and 210 (first rotating members) are arranged above, the link sections 20 and 220 (second rotating members) are arranged below, and the motor 30 (electric drive section) is arranged between the link sections 10 and 210 and the link sections 20 and 220, but the present invention is not limited to this. In the present invention, the first rotating members and the second rotating members may be arranged along the horizontal direction. Furthermore, the electric drive section may be arranged outside the first rotating members and the second rotating members, rather than between the first rotating members and the second rotating members.

[0112] In the first embodiment, the link sections 10 and 20 (rotating members) are positioned in the pressing position by rotating past the orthogonal position relative to the door section 102, and in the second embodiment, the link sections 210 and 220 (rotating members) are positioned in the pressing position without passing the orthogonal position, but the present invention is not limited to this. In the present invention, the rotating members may be positioned in an orthogonal position perpendicular to the surface of the door section and then positioned in the pressing position where they press the door section.

[0113] In the first embodiment, the pin members 51 and 61 are configured to be changeable between the holding position and the idling position, but the present invention is not limited to this. In the present invention, the pin members may be fixed and not move. In this case, in the event of a power outage, the rotating member may be configured to rotate manually along a path similar to the rotation caused by the motor (electric drive unit).

[0114] In the first and second embodiments, the pin members 51, 61, and 251 are moved from the holding position to the idling position by the wire 81 connected to the handle member 80, but the present invention is not limited to this. In the present invention, the pin members may be moved by transmitting an operating force using hydraulic pressure or compressed air instead of a wire. Alternatively, the operating force may be transmitted using a mechanical structure such as a screw or gear. Alternatively, the handle member may not be provided, and the rotating member may be automatically moved to the release position when the power supply is stopped during a power outage or other such event.

[0115] In the first and second embodiments, the pin member 51 is biased from the idling position toward the holding position by an elastic force, but the present invention is not limited to this. In the present invention, the pin member may be moved to the holding position by manual power. Alternatively, the pin member may be moved to the holding position by electric drive. The pin member may also be moved to the holding position by gravity, magnetic force, or the like.

[0116] Furthermore, in the above-described first and second embodiments, examples have been shown in which the link sections 10 and 210 (first rotating members) and the link sections 20 and 220 (second rotating members) have the same shape, and the rod sections 43 and 243 (first rod sections) and the rod sections 44 and 244 (second rod sections) have the same shape, but the present invention is not limited to this. In the present invention, the first rotating member and the second rotating member may have different shapes. Also, the first rod section and the second rod section may have different shapes.

[0117] Furthermore, in the first embodiment, when the link portion 10 (rotating member) is positioned in the open position set by operation of the handle member 80, the link portion 10 is positioned so as to overlap the pin member 51 as viewed from the direction in which the pin member 51 extends. However, the present invention is not limited to this. In the present invention, even when the rotating member is positioned in the open position set by operation of the handle member, the rotating member may be positioned so as not to overlap the pin member as viewed from the direction in which the pin member extends. For example, the rotating member may be positioned to the open position by rotating past the position of the pin member. In this case, it is conceivable that the pin member will move from the idling position to the holding position due to the rotating member rotating past the position of the pin member, induced by the biasing member. In consideration of this, the pin member may be configured to prevent the rotating member from rotating in one direction about a predetermined rotation axis, but not prevent the rotating member from rotating in the other direction. For example, as in the case of pin member 551 in holding portion 550 according to the third modified example of the first embodiment shown in Figure 19, by arranging an inclined surface 551d on the tip side of pin member 551, when link portion 10 (rotating member) rotates to one side around a predetermined rotation axis (clockwise direction as viewed from the X1 side: A11 direction), side portion 551e of the rod-shaped pin member abuts against link portion 10, etc., thereby suppressing the rotation, and when link portion 10 rotates to the other side (counterclockwise direction: A12 direction), link portion 10, etc. abuts against inclined surface 551d on the tip side, so that the rotation is not suppressed.

[0118] Furthermore, in the above first to third embodiments, an example has been shown in which the door portion 102 provided on the railway vehicle 101 is held down, but the present invention is not limited to this. In the present invention, the door portion provided on a vehicle other than a railway vehicle may also be held down.

[0119] The configuration of the second embodiment may be combined with the configuration of the first embodiment. For example, the holding unit 250 of the second embodiment may be applied to the holding unit 50 of the first embodiment. In this case, as in FIG. 9 , the motor 30 may also position the link units 10 and 20 in the pressing position by rotating the pin member so as not to exceed the orthogonal position when the pin member is moved to the idling position by the pin drive unit, as in the first embodiment. Specifically, as in the fourth modified example of the first embodiment shown in FIG. 20 , when a triangular link unit 10 (rotating member) and a curved rod unit 43 are arranged as in the first embodiment, the link unit 10 rotates in the A12 direction from the release position to the pressing position so as not to exceed the orthogonal position when the pin member 251 of the holding unit 250 is moved to the idling position on the X2 direction side by the pin drive unit 254 (see FIG. 10 ). Then, when the link unit 10 is disposed in a pressing position that does not exceed the orthogonal position, the pin member 251 of the holding unit 250 moves to a holding position in the X1 direction, so that even if an external force is applied to the door unit 102, the holding unit 250 suppresses rotation and holds the link unit 10 in the pressing position. Note that in the fourth modified example, similar to the operation during a power outage in the first embodiment, the link unit 10 is suppressed from rotating in the A11 direction by the pin member 53, which is a fixed pin, in the open position.

[0120] In the third embodiment, the biasing force of the pins 691a and 691b is used to maintain the transmission mechanism 640 in the open position, but the present invention is not limited to this. In the present invention, the transmission mechanism 640 may be maintained in the open position using a magnet.

[0121] In the third embodiment, an example was shown in which the open position maintaining unit 691 is provided on the link unit 10 side and the open position maintaining unit 692 is provided on the link unit 20 side, but the present invention is not limited to this. In the present invention, only one of the open position maintaining unit 691 on the link unit 10 side and the open position maintaining unit 692 on the link unit 20 side may be provided. [Explanation of symbols]

[0122] 10, 210 Link portion (first rotating member, rotating member) 20, 220 Link portion (second rotating member, rotating member) 30 Motor (electric drive unit, motor) 31 Output shaft (motor rotating shaft) 40, 240, 640 Transmission mechanism 41, 241 Pinion part 42, 242 rack section 43, 243, 443, 643 Rod part (first rod part) 44, 244, 644 Rod part (second rod part) 50, 60, 250, 350a, 350b, 350c, 550, 650, 660 Holding part 51, 61, 251, 351a, 351b, 351c, 551, 651, 661 Pin members 80 Handle member 100, 200, 600 door stopper 101 Railway vehicles (vehicles) 102 Door section

Claims

1. a rotating member that rotates about a predetermined rotation axis to be positioned at a pressing position where the vehicle door portion in a closed state is pressed from the inside to the outside of the vehicle, and at an open position where the state of pressing the door portion is released; a motor-driven drive unit that supplies a driving force for rotating the rotating member between the pressing position and the open position by motor-driven operation;

2. The door holding device according to claim 1 , further comprising a holding portion that holds the rotating member at the holding position.

3. a transmission mechanism that transmits a driving force from the electric drive unit to the rotating member, The door holding device according to claim 2 , wherein the holding portion includes a pin member that holds the rotating member at the holding position by contacting at least one of the rotating member and the transmission mechanism portion.

4. the rotating member includes an abutting portion that abuts against the door portion, and is disposed at the pressing position by rotating toward one side about the predetermined rotation axis, the electric drive unit rotates the rotating member beyond an orthogonal position where a line connecting the predetermined rotation axis of the rotating member and the tip of the abutting portion is orthogonal to a surface of the door part, thereby placing the rotating member at the pressing position; 4. The door holding device according to claim 3, wherein the pin member abuts against at least one of the rotating member and the transmission mechanism so as to prevent the rotating member, when positioned at the holding position, from rotating toward one side around the predetermined rotation axis.

5. 4. The door stop device according to claim 3, wherein the pin member is arranged to extend in a direction parallel to the predetermined rotation axis, and is configured to be able to change between a holding position in which the rotating member is held and a free-spinning position in which the rotating member is not held by moving in a direction parallel to the predetermined rotation axis.

6. a handle member for moving the pin member; The door holding device according to claim 5, wherein the pin member moves from the holding position to the free-spinning position when an operating force is applied to the handle member.

7. The rotating members include a first rotating member and a second rotating member that are arranged along the up-down direction and each presses the door portion from the inside toward the outside of the vehicle, The door holding device according to any one of claims 1 to 6, wherein the electric drive unit supplies a drive force for rotating the first rotating member and the second rotating member in common.

8. a transmission mechanism that transmits a driving force from the electric drive unit to the rotating member, the electric drive unit includes a motor that rotates a motor rotation shaft by electric drive, The transmission mechanism includes: a pinion portion connected to the motor rotary shaft; a rack portion having a rod shape extending in the vertical direction and fitted with the pinion portion to move in the vertical direction by rotation of the motor, The door holding device according to claim 7 , wherein the first rotating member and the second rotating member rotate in conjunction with each other in response to vertical movement of the rack portion.

9. the transmission mechanism includes a rod-shaped first rod portion connecting an upper portion of the rack portion and the first rotating member, and a rod-shaped second rod portion connecting a lower portion of the rack portion and the second rotating member, the first rotation member rotates about the predetermined rotation axis when the first rod portion is moved by vertical movement of the rack portion, The door holding device according to claim 8 , wherein the second rotation member rotates about the predetermined rotation axis when the rack portion moves up and down to move the second rod portion.

10. The door retaining device according to claim 9 , wherein the first rod portion and the second rod portion have a curved rod shape.

11. The door holding device according to claim 7 , wherein the electric drive unit is disposed between the first rotating member and the second rotating member which are disposed along the vertical direction.

12. The door holding device according to claim 5 or 6, further comprising a biasing member that biases the pin member from the idling position toward the holding position by means of an elastic force.

13. a pin driving unit that moves the pin member from the holding position to the idling position, the rotating member includes an abutting portion that abuts against the door portion, and is disposed at the pressing position by rotating toward one side about the predetermined rotation axis, the electric drive unit, with the pin member moved to the idling position by the pin drive unit, rotates the rotating member so that a straight line connecting the predetermined rotation axis of the rotating member and the tip of the abutting portion does not exceed an orthogonal position perpendicular to the surface of the door portion, thereby placing the rotating member at the pressing position; 7. The door holding device according to claim 5, wherein the pin member is moved from the free-spinning position to the holding position by the pin drive unit while the rotating member is positioned at the holding position, thereby holding the rotating member at the holding position.

14. The door holding device according to any one of claims 1 to 6, wherein the rotating member holds the door portion for a railway vehicle when the rotating member is disposed at the holding position.

15. a transmission mechanism that rotates the rotating member from the release position toward the pressing position by moving downward with the electric drive unit; The door holding device according to any one of claims 1 to 6, further comprising an open position maintaining unit that maintains the transmission mechanism unit in the open position even when no driving force is supplied by the electric drive unit.

16. 16. The door retaining device of claim 15, wherein the open position maintaining unit has a maintaining force that restricts downward movement of the transmission mechanism unit due to its own weight when no driving force is supplied by the electric drive unit, and allows downward movement of the transmission mechanism unit when driving force is supplied by the electric drive unit.

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