JP7404948B2 - door closing device - Google Patents

Description

The present invention relates to a door closing device, and particularly to a door closing device including a regulating portion that regulates movement of a door body in an opening direction.

BACKGROUND ART Conventionally, door closing devices are known that include a regulating portion that regulates movement of a door body in an opening direction (see, for example, Patent Document 1).

The sliding door device (door closing device) described in Patent Document 1 is provided with a moving body that suspends a door provided at a train entrance and moves in the left-right direction. Further, the sliding door device includes a locking mechanism that maintains and locks the door body (moving body) in a closed state. The locking mechanism includes a latch bar configured to be slidable in the vertical direction. The latch bar is configured to move in and out of a latch hole provided in the movable body, and is engaged with the movable body by being engaged with the latch hole. This locks the door body. Further, a latch plate is fixed to the head of the latch rod.

Further, the sliding door device is provided with an electromagnetic solenoid. The electromagnetic solenoid is configured such that a plunger provided in the electromagnetic solenoid projects upward when the electromagnetic solenoid is turned on. The plunger projecting upward contacts the latch plate and presses the latch plate, thereby lifting the latch bar via the latch plate. As a result, the latch rod is disengaged from the latch hole, whereby the engagement between the latch rod and the latch hole is released, and the door body is unlocked to the open state.

Japanese Patent Application Publication No. 2003-237569

However, in Patent Document 1, there is a problem that noise is generated during the unlocking operation due to contact (collision) between parts such as the contact (collision) between the plunger and the latch plate as described above. There is.

This invention was made to solve the above-mentioned problems, and one purpose of the invention is to reduce the noise generated when unlocking the locked state where movement of the door body is restricted. The object of the present invention is to provide a door closing device capable of closing the door.

In order to achieve the above object, a door closing device according to one aspect of the present invention includes a drive source for opening and closing a door body, and a movement of the door body in the opening direction by driving the drive source. A regulating part, the regulating part regulates the movement of the door in the opening direction by engaging with a door fixing part fixed to the door body, and also has an engagement position with the door fixing part. A pin member that is biased towards the pin member, a pin holding member that holds the pin member and moves integrally with the pin member, and a shaft, and by moving the shaft linearly and pressing the pin holding member. a shaft drive unit that moves the pin holding member in a direction away from the engagement position and moves a pin member held by the pin holding member in a direction away from the engagement position; and the pin member moves away from the engagement position. included in the regulating part when the locked state in which movement of the door body is regulated is released by releasing the engagement state between the pin member and the door body fixing part as the door body is moved in the direction A buffer section for mitigating shocks caused by collisions between parts; between the parts of the section, and at least one of the following .

In the door closing device according to one aspect of the present invention, as described above, a buffer section is provided for mitigating the impact caused by collision of parts included in the regulating section when the locked state is released. ing. Thereby, it is possible to reduce the noise generated when the parts included in the restriction part collide with each other. As a result, it is possible to reduce the noise generated when the locked state in which movement of the door body is regulated is released.

Moreover, in the door closing device according to the above-described one aspect, preferably, the buffer portion includes an elastic member. With this configuration, when the locked state in which movement of the door body is restricted is released, the impact caused by the collision of parts included in the restriction part with each other can be easily alleviated by elastic deformation of the elastic member. I can do it. As a result, it is possible to further reduce the noise generated when the parts included in the restriction part collide with each other.

Further, in the door closing device according to the above-described one aspect, preferably, the buffer section includes a first buffer member provided at the tip of the shaft on the pin holding member side. With this configuration, the first buffer member can reduce noise generated when the tip of the shaft collides with the pin holding member.

In this case, preferably, the first buffer member includes a first portion fixed to the tip of the shaft, a second portion held by the first portion and provided between the pin holding member and the first portion; including. With this configuration, the second portion can reduce the noise generated when the tip of the shaft collides with the pin holding member when releasing the locked state in which movement of the door body is restricted. can.

Further, in the door closing device in which the first buffer member includes a first part and a second part, preferably, the first part is arranged so as to surround a holding surface that holds the second part, and the holding surface, It has an annular side surface portion provided so as to extend from the holding surface side to the pin holding member side. With this configuration, since the side part is provided so as to extend from the holding surface side to the pin holding member side, even if the second part is damaged or falls off from the first part, the side part will protect the pin holding member. can be easily pressed. In addition, since the side part is provided in an annular shape, the area of the side part that collides with the pin holding member can be made relatively large, so that the locked state where movement of the door body is restricted can be made relatively large. It is possible to reduce the noise generated when the side surface collides with the pin holding member during release. Further, since the second portion is held by the holding surface, the second portion can be stably held.

Further, in the door closing device in which the first buffer member includes a first part and a second part, preferably, a first recess is provided in the surface of the pin holding member on the first buffer member side, and the buffer part is , a second buffer member disposed in the first recess of the pin holding member and abutting the second portion of the first buffer member. With this configuration, the second buffer member can further reduce the noise generated when the tip of the shaft collides with the pin holding member when releasing the locked state in which movement of the door body is restricted. can do. Further, even if the second portion falls off, the second buffer member can reduce the noise generated when the tip of the shaft and the pin holding member collide.

In this case, preferably, the portion of the second portion that comes into contact with the second buffer member is formed into a substantially flat surface. With this configuration, since the second portion and the second buffer member can be brought into surface contact, the movement of the door body is restricted compared to the case where the second portion and the second buffer member are in point contact. It is possible to reduce the noise generated when unlocking the locked state.

Further, in the door closing device according to the first aspect, preferably, the shaft drive section includes a shaft and a solenoid main body section into which the shaft is inserted, and moves the shaft in the axial direction of the shaft by the force of a magnetic field. A solenoid is provided on the shaft on the side opposite to the pin holding member side of the shaft with respect to the solenoid body, and the shaft holds the pin by restricting movement toward the pin holding member side by the solenoid body. The solenoid includes a stopper portion that stops moving toward the member at a predetermined position, and the buffer portion includes a third buffer member provided between the stopper portion and the solenoid main body. With this configuration, the impact caused by the collision between the stopper part and the solenoid main body part can be alleviated by the third buffer member, so that when releasing the locked state in which movement of the door body is restricted, Noise generated by collision between the stopper part and the solenoid main body can be reduced.

Further, in the door closing device according to the first aspect, preferably, an engagement member that engages with the pin holding member is provided at the end of the pin member opposite to the door body fixing portion, and the pin holding member is provided with an engaging member that engages with the pin holding member. The member includes a support surface that supports the engagement member from the door body side, and the buffer section includes a sheet-shaped fourth buffer member provided to be sandwiched between the support surface and the engagement member. With this configuration, when the locked state in which movement of the door body is regulated is released, the impact caused by the collision between the support surface and the engagement member can be alleviated by the fourth buffer member. Noise generated by collision between the support surface and the engagement member can be reduced.

In this case, the pin holding member includes a through hole into which the end of the pin member is inserted and an engaging member provided at the end of the pin member is accommodated, and the through hole includes a connection between the engaging member and the through hole. A gap portion is provided between the buffer portion and the inner wall surface, and the buffer portion includes a gel-like fifth buffer member that is filled in the gap portion of the through hole and is provided so as to sandwich the engagement member between the fourth buffer member and the fourth buffer member. include. With this configuration, the engagement member is sandwiched between the fourth buffer member and the fifth buffer member, so that the engagement member is engaged inside the through hole when releasing the locked state in which movement of the door body is restricted. The impact caused by the collision between the mating member and the inner wall surface of the through hole can be alleviated. As a result, it is possible to reduce the noise generated by the collision between the engaging member and the inner wall surface of the through hole.

Further, in the door closing device according to the first aspect, preferably, the buffer section alleviates a shock caused by collision between components included in the regulating section when the door body provided on the railway vehicle is unlocked. do. With this configuration, it is possible to reduce the noise generated when the locked state in which the movement of the door body is regulated in the railway vehicle is released.

According to the present invention, as described above, it is possible to reduce the noise generated when the locked state in which movement of the door body is regulated is released.

It is a perspective view showing the composition of the door closing device by one embodiment. It is a figure for explaining operation of a door closing device by one embodiment. (FIG. 2(A) is a diagram with the door closed. FIG. 2(B) is a diagram with the door open.) FIG. 2 is a front view of the locking device in a locked state according to one embodiment. FIG. 3 is a front view of the locking device according to one embodiment when the locked state is released. 4 is a cross-sectional view taken along line 200-200 in FIG. 3. FIG. FIG. 3 is a partially enlarged cross-sectional view of the vicinity of a solenoid according to one embodiment. FIG. 2 is a perspective view showing the configuration of a solenoid according to one embodiment. FIG. 3 is a plan view showing the fixing part and the contact part as seen from the Z1 direction according to one embodiment. 6 is a partially enlarged view of the vicinity of the cap portion in FIG. 5. FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described based on the drawings.

[This embodiment]
The configuration of the door closing device 100 according to this embodiment will be described with reference to FIGS. 1 to 9.

(Configuration of door closing device)
As shown in FIG. 1, the door closing device 100 is an electric device that opens and closes door bodies A and B. The door closing device 100 is mounted on a railway vehicle. The door closing device 100 includes a drive source 10, a direction changing device 20, and a locking device 30. Note that the lock device 30 is provided to restrict movement of the door bodies A and B in the opening direction when the drive source 10 is driven. Further, the locking device 30 is an example of a "regulating section" in the claims.

In the following description, the opening/closing direction of the door bodies (A, B) will be referred to as the X direction, one of the X directions will be referred to as the X1 direction, and the other of the X directions will be referred to as the X2 direction. Further, the vertical direction is defined as the Z direction, one of the Z directions is defined as the Z1 direction (upward direction), and the other of the Z directions is defined as the Z2 direction (downward direction). A direction perpendicular to the X direction and the Z direction is defined as a Y direction, one of the Y directions is defined as a Y1 direction (vehicle inward direction), and the other Y direction is defined as a Y2 direction (vehicle outward direction). In addition, the state in which the door bodies (A, B) are moved in the closing direction and closed is called the door closed state (see Figure 2 (A)), and the state in which the door bodies (A, B) are moved in the open direction and closed is called the door closed state. Let the door be in the open state (see FIG. 2(B)).

The drive source 10 is configured to generate a drive force for opening and closing the door bodies (A, B). Specifically, the drive source 10 is constituted by an electric motor having an output shaft that rotates around a rotation center axis extending in the direction along the Y direction.

As shown in FIG. 2, the direction changing device 20 includes a housing 21 (see FIG. 1), a pinion gear 22, a first rack 23, a first connecting arm 24, a second rack 25, and a second connecting arm. 26 and an engaging body 27. The housing 21 has an elongated box shape extending along the X direction. A pinion gear 22, a first rack 23, a first connecting arm 24, a second rack 25, and a second connecting arm 26 are housed inside the housing 21. The pinion gear 22 is attached to the output shaft of the drive source 10. The pinion gear 22 rotates as the output shaft rotates. Note that the engaging body 27 is an example of a "door body fixing part" in the claims.

The first rack 23 is arranged in the X1 direction when the door is closed. The first rack 23 extends in the X direction. The first rack 23 moves in the X direction along the guide rail 23a by rotation of the pinion gear 22. The first connecting arm 24 connects the door body A and the first rack 23. As a result, the first connecting arm 24 moves integrally with the first rack 23 in the X direction.

Specifically, the first rack 23 moves in the X2 direction along the guide rail 23a due to the rotation of the pinion gear 22 in the R1 direction (clockwise direction). At this time, the door body A (see FIG. 1) moves in the X2 direction as the first connecting arm 24 moves in the X2 direction together with the first rack 23. This causes door body A to open. The first rack 23 moves in the X1 direction along the guide rail 23a due to rotation of the pinion gear 22 in the R2 direction (counterclockwise direction). At this time, the door body A moves in the X1 direction as the first connecting arm 24 moves in the X1 direction together with the first rack 23. This closes the door body A.

The second rack 25 is arranged on the X2 direction side when the door is closed. The second rack 25 extends in the X direction. The second rack 25 moves in the X direction along the guide rail 25a due to the rotation of the pinion gear 22. The second connecting arm 26 connects the door body B (see FIG. 1) and the second rack 25. Thereby, the second connection arm 26 moves integrally with the second rack 25 in the X direction.

Specifically, the second rack 25 moves in the X1 direction along the guide rail 25a due to rotation of the pinion gear 22 in the R1 direction (clockwise direction). At this time, the door body B moves in the X1 direction as the second connecting arm 26 moves in the X1 direction together with the second rack 25. This causes door body B to open. The second rack 25 moves in the X2 direction along the guide rail 25a due to the rotation of the pinion gear 22 in the R2 direction (counterclockwise direction). At this time, the door body B moves in the X2 direction as the second connecting arm 26 moves in the X2 direction together with the second rack 25. This closes the door body B.

The engaging body 27 has a portion that engages with a lock pin 31 (see FIG. 3) of the locking device 30, which will be described later. The engaging body 27 is a member extending in the X direction. The end of the engagement body 27 on the X2 direction side is fixed to the second connection arm 26. Thereby, the engaging body 27 moves integrally with the second connecting arm 26 in the X direction. Note that the lock pin 31 is an example of a "pin member" in the claims.

As shown in FIGS. 3 and 4, the locking device 30 restricts (locks) the movement of door body A and door body B in the ). Specifically, the lock device 30 includes a lock pin 31, a pin holding member 32, a solenoid 33, a base 34 (see FIG. 5), and a slide portion 35 (see FIG. 5). Note that the solenoid 33 is an example of a "shaft drive unit" in the claims.

The base 34 is a plate-shaped member that holds the solenoid 33 and the slide portion 35. The solenoid 33 and the slide portion 35 are fixed to the base 34 by a fastening member (not shown).

As shown in FIG. 5, the lock pin 31 is configured to restrict movement of the door body B in the opening direction by engaging with the engaging body 27 fixed to the door body B (see FIG. 3). ing. The lock pin 31 is restricted from moving only in the vertical direction (Z direction) by the pin guide member 31a. The pin guide member 31a is a guide member provided with a through hole 31b through which the lock pin 31 passes. That is, the lock pin 31 is guided in movement in the Z direction in the through hole 31b of the pin guide member 31a. Specifically, the lock pin 31 is disposed within the pin guide member 31a so as to be movable in the Z direction, with a portion of the Z1 direction side and a portion of the Z2 direction side protruding.

A male threaded portion 31f (see FIG. 9) is formed at an end portion 31d (see FIG. 9) of the lock pin 31 that protrudes in the Z1 direction. The protruding portion of the lock pin 31 in the Z2 direction comes into contact with the engaging body 27, so that the lock pin 31 and the engaging body 27 are engaged, thereby preventing the door body B (see FIG. 1) from moving in the X1 direction. It is possible to create a regulated state. Note that the movement of the door body B in the X1 direction is an example of "the movement of the door body in the opening direction" in the claims.

Further, a spring member 31c is provided in the through hole 31b of the pin guide member 31a to bias the lock pin 31 toward the engagement position between the lock pin 31 and the engaging body 27 (toward the Z2 direction side). ing.

The lock pin 31 is configured to move in the Z1 direction against the biasing force of the spring member 31c when a shaft 33a, which will be described later, moves in the Z1 direction. The lock pin 31 is configured to move the shaft 33a in the Z2 direction according to the urging force of the spring member 31c. That is, the locked state is released by moving the shaft 33a in the Z1 direction as described later. Furthermore, the shaft 33a moves in the Z2 direction due to the biasing force of the spring member 31c, thereby returning to the locked state.

As shown in FIGS. 3 and 4, the pin holding member 32 is configured to hold the lock pin 31 and move integrally with the lock pin 31. The pin holding member 32 is formed of a plate-like member made of metal (steel material). The pin holding member 32 holds the lock pin 31 by supporting a nut 31e that engages with the lock pin 31 from the Z2 direction side using a support surface 32g, as will be described later.

Further, the pin holding member 32 includes a flat plate portion 32a that is pressed by a shaft 33a of the solenoid 33, which will be described later, and a cap portion 32b into which an end portion 31d of the lock pin 31 is inserted. The flat plate portion 32a and the cap portion 32b are fastened together by a fastening member (not shown). The cap portion 32b is arranged on the surface of the flat plate portion 32a on the Z1 direction side. Note that the flat plate portion 32a and the cap portion 32b may be integrally formed.

Furthermore, a slider attachment portion 36 (see FIG. 5) attached to a slider 35b (described later) is fastened to the pin holding member 32 by a fastening member (not shown). That is, the pin holding member 32 (flat plate portion 32a and cap portion 32b) is configured to move integrally with the slider mounting portion 36. Note that in FIGS. 3 and 4, illustration of the slider mounting portion 36 is omitted for the sake of simplification. Furthermore, the slider mounting portion 36 is made of the same material as the pin holding member 32.

The solenoid 33 has a shaft 33a that moves forward and backward in the Z direction. Further, the solenoid 33 has a solenoid body portion 33b into which a shaft 33a is inserted. The solenoid 33 is configured to linearly move the shaft 33a in the Z direction (the axial direction of the shaft) by the force of the magnetic field generated inside the solenoid body 33b. Note that the shaft 33a is made of metal (for example, stainless steel).

The solenoid 33 is configured to press the pin holding member 32 (flat plate portion 32a) with the shaft 33a by linearly moving the shaft 33a toward the Z1 side (pin holding member 32 side). As a result, the solenoid 33 moves the pin holding member 32 in the direction away from the engagement position between the lock pin 31 and the engaging body 27 (to the Z1 direction side), and also moves the lock pin 31 held by the pin holding member 32 is configured to move in a direction away from the engagement position (in the Z1 direction) (see FIG. 4). As the lock pin 31 is moved in the direction away from the engagement position, the engagement between the lock pin 31 and the engagement body 27 is released, thereby restricting the movement of the door bodies A and B. The locked state will be released.

Here, in this embodiment, the locking device 30 includes a buffer section 40 for alleviating the impact caused by the collision of components included in the locking device 30 when the locked state is released. Specifically, the buffer portion 40 prevents at least the metal parts from colliding with each other. Details of the buffer section 40 will be described later.

As shown in FIG. 5, the slide portion 35 includes a slide rail 35a and a slider 35b. The slide rail 35a extends in the Z direction. The slide rail 35a is fixed to the base 34. The slider 35b is attached to be movable in the Z direction along the slide rail 35a. A slider attachment portion 36 is attached to the slider 35b.

(Composition of buffer section)
In this embodiment, as shown in FIGS. 3 and 4, the buffer section 40 includes a buffer member 41 provided at the tip end 33c of the shaft 33a on the pin holding member 32 side. Specifically, the buffer member 41 is provided between the tip portion 33c of the shaft 33a and the pin holding member 32 (flat plate portion 32a). Note that the buffer member 41 is an example of a "first buffer member" in the claims.

Specifically, as shown in FIG. 6, the buffer member 41 includes a fixing part 41a fixed to the tip end 33c of the shaft 33a. Moreover, the buffer member 41 is held by the fixing part 41a and includes an abutting part 41b provided between the pin holding member 32 (flat plate part 32a) and the fixing part 41a. The fixed part 41a and the contact part 41b are formed separately. Thereby, if either the fixing part 41a or the contact part 41b is damaged, it is only necessary to replace the damaged one. Note that the contact portion 41b is fixed by being bonded to a holding surface 41c, which will be described later, of the fixing portion 41a. Further, the fixing portion 41a and the contact portion 41b are examples of a “first portion” and a “second portion” in the claims, respectively.

Furthermore, the fixing portion 41a is fixed to the tip 33c of the shaft 33a by inserting the tip 33c of the shaft 33a into a recess 41d provided at the end on the shaft 33a side (Z2 direction side). The tip 33c of the shaft 33a and the inner wall surface of the recess 41d are bonded with adhesive.

Furthermore, in this embodiment, the fixing part 41a has a holding surface 41c that holds the abutting part 41b. The holding surface 41c has a flat surface shape extending orthogonally to the Z direction. The fixing portion 41a also has an annular (see FIG. 7) side surface portion 41e that is arranged to surround the holding surface 41c and extends from the holding surface 41c side to the pin holding member 32 (flat plate portion 32a) side. have In other words, the fixing portion 41a is provided with the holding surface 41c and the side surface portion 41e, thereby forming a recessed portion in which the abutment portion 41b is arranged.

Further, the contact portion 41b is provided so as to protrude toward the pin holding member 32 side from the end portion of the side surface portion 41e on the pin holding member 32 side. Specifically, the length L1 from the lower end (Z2 side end) of the fixed part 41a to the upper end (Z1 side end) of the contact part 41b is longer than the length L2 of the fixed part 41a in the Z direction. big. The length L2 of the fixed part 41a is such that even if the contact part 41b falls off from the fixed part 41a, the pin holding member 32 (flat plate part 32a) can be pressed by the upper end (end on the Z1 side) of the side surface part 41e. The length is such that the locked state can be released by Specifically, the difference (L1-L2) between the length L1 and the length L2 is, for example, about 2 mm. Note that the difference between the length L1 and the length L2 is smaller than the length L2. Further, the difference between the length L1 and the length L2 is smaller than the stroke (distance that can be moved in the Z direction) of the shaft 33a.

Further, in this embodiment, the buffer member 41 includes an elastic member. Specifically, the contact portion 41b is made of resin such as urethane. Note that the fixing portion 41a is made of metal. Note that the fixing portion 41a may be made of resin as an elastic member, similar to the contact portion 41b. In this case, the contact portion 41b and the fixing portion 41a may be integrally formed.

Further, a recess 32e is provided in a surface 32d of the pin holding member 32 (flat plate portion 32a) on the buffer member 41 side. Note that the recess 32e is an example of a "first recess" in the claims.

Here, in this embodiment, the buffer section 40 includes a buffer member 42 that is disposed in the recess 32e of the pin holding member 32 (flat plate section 32a) and contacts the contact section 41b of the buffer member 41. The buffer member 42 is bonded to the bottom surface (Z1 side surface) 32f of the recess 32e. Note that the buffer member 42 is an example of a "second buffer member" in the claims.

As shown in FIG. 8, the buffer member 42 has a circular shape when viewed from the Z2 direction side. The buffer member 42 is provided so as to overlap the entire fixed portion 41a in the Z direction.

Further, the buffer member 42 includes an elastic member. Specifically, the buffer member 42 is made of resin such as chloroprene rubber.

Further, in this embodiment, as shown in FIG. 6, the portion of the contact portion 41b that contacts the buffer member 42 is formed into a substantially flat surface shape. Specifically, the contact portion 41b includes a circular end surface 41f that contacts the buffer member 42. That is, the contact portion 41b makes surface contact with the buffer member 42. Further, the diameter r of the end surface 41f is, for example, about 10 mm. Note that the contact portion 41b has a cylindrical shape that tapers in the Z1 direction. That is, the contact portion 41b has a truncated cone shape.

Further, the end surface 41f of the contact portion 41b and the buffer member 42 are in contact with each other in the locked state in which the lock pin 31 and the engaging body 27 are engaged. That is, the contact state between the contact portion 41b and the buffer member 42 is maintained during the unlocking operation of the locked state.

Further, a buffer member 50 is attached to the lower surface 33d of the solenoid main body 33b on the Z2 direction side. The buffer member 50 is an annular member provided so that the shaft 33a passes through it. Further, the buffer member 50 is made of PET resin. Note that the buffer member 50 may be made of other materials (eg, urethane resin, chloroprene rubber, etc.).

The solenoid 33 also includes a stopper portion 33e provided on the shaft 33a on the side opposite to the tip portion 33c of the shaft 33a on the pin holding member 32 side (Z1 direction side) with respect to the solenoid body portion 33b. The stopper portion 33e is provided closer to the Z2 direction than the buffer member 50. Since the stopper portion 33e is fixed to the shaft 33a, it moves in the Z direction as the shaft 33a moves in the Z direction. Further, the stopper portion 33e stops the movement of the shaft 33a toward the pin holding member 32 at a predetermined position by restricting movement toward the pin holding member 32 (Z1 direction side) by the solenoid body portion 33b. It is configured as follows.

Moreover, the stopper part 33e is an annular member provided so that the shaft 33a passes through it. Note that the stopper portion 33e is a metal member.

Here, in this embodiment, the buffer section 40 includes a buffer member 43 provided between the stopper section 33e and the solenoid main body section 33b (buffer member 50). Specifically, the buffer member 43 is provided so as to overlap the upper surface 33f (the surface on the Z1 direction side) of the stopper portion 33e. Thereby, when the locked state is released, the stopper portion 33e moves in the Z1 direction together with the shaft 33a, and thereby the buffer member 43 moves in the Z1 direction. Then, the buffer member 43 comes into contact with the buffer member 50 (see FIG. 4), thereby stopping the movement of the shaft 33a. Note that, like the stopper portion 33e, the buffer member 43 is also an annular member provided so that the shaft 33a passes through it. Note that the buffer member 43 is an example of a "third buffer member" in the claims.

Moreover, the buffer member 43 includes an elastic member. Specifically, the buffer member 42 is made of resin such as chloroprene rubber.

As shown in FIG. 9, a nut 31e that engages with the pin holding member 32 (flat plate portion 32a) is provided at an end portion 31d of the lock pin 31 on the opposite side from the engaging body 27. Further, the pin holding member 32 (flat plate portion 32a) includes a support surface 32g that supports the nut 31e from the door body A and B sides (Z2 direction side). The support surface 32g is a surface that engages with the nut 31e. Further, the nut 31e is engaged (screwed) with the male threaded portion 31f of the lock pin 31. Note that the nut 31e is an example of an "engaging member" in the claims.

Furthermore, a nut 31h is provided on the end portion 31d of the lock pin 31 so as to overlap with the nut 31e on the Z1 direction side of the nut 31e. The nut 31h is provided to prevent the nut 31e from loosening.

With this configuration, the shaft 33a (see FIG. 3, etc.) engages with the pin holding member 32 (flat plate part 32a) by pressing the pin holding member 32 (flat plate part 32a) in the Z1 direction. The nut 31e is moved in the Z1 direction, and the lock pin 31 that is engaged (threaded) with the nut 31e is moved in the Z1 direction. As a result, the engagement between the lock pin 31 and the engaging body 27 is released, and the locked state of the locking device 30 is released.

The pin holding member 32 also includes a through hole 32h into which an end 31d (male thread 31f) of the lock pin 31 is inserted and a nut 31e provided at the end 31d of the lock pin 31 is accommodated. Specifically, the through hole 32h is provided in the cap portion 32b. A nut 31h is also accommodated in the through hole 32h of the cap portion 32b.

The through hole 32h of the cap portion 32b is provided with a recess 32i into which the outer peripheral edge 31g of the nut 31e is inserted. The recess 32i is provided circumferentially around the lock pin 31 in accordance with the shape of the annular nut 31e.

Here, as described above, after the pin holding member 32 (flat plate part 32a) and the lock pin 31 move integrally in the Z1 direction, the movement of the shaft 33a (see FIG. 3, etc.) is stopped and the pin At the moment when the movement of the holding member 32 is stopped, an inertial force acts on the lock pin 31, so that only the lock pin 31 attempts to move further in the Z1 direction. In this case, the outer peripheral edge 31g of the nut 31e is caught in the recess 32i, thereby preventing the lock pin 31 from moving in the Z1 direction. On the other hand, the outer peripheral edge 31g of the nut 31e collides with the cap portion 32b in the recess 32i.

Immediately after this, when the nut 31e returns to the Z2 direction side (supporting surface 32g), the nut 31e collides with the supporting surface 32g of the pin holding member 32 (flat plate portion 32a).

Here, in this embodiment, the buffer section 40 includes a sheet-shaped buffer member 44 that is provided so as to be sandwiched between the support surface 32g and the nut 31e. Specifically, the buffer member 44 is an annular member provided so that the lock pin 31 passes through it. Note that the buffer member 44 is an example of a "fourth buffer member" in the claims.

The buffer member 44 has a thickness t in the Z direction. By providing this buffer member 44, it is possible to reduce the gap C1 in the Z direction between the recess 32i and the outer peripheral edge 31g of the nut 31e. As a result, it is possible to reduce the noise generated when the nut 31e collides with the cap portion 32b in the recess 32i. Note that the gap C1 in the Z direction between the recess 32i and the outer peripheral edge 31g of the nut 31e may be set to zero.

Further, the buffer member 44 includes an elastic member. Specifically, the buffer member 44 is made of resin such as Teflon (registered trademark). This makes it easier for the nut 31e to slip, so it is possible to reduce noise caused by friction in the nut 31e. Note that the buffer member 44 may be made of urethane resin, chloroprene rubber, or the like.

Further, the through hole 32h is provided with a gap C2 between the nut 31e and the nut 31h and the inner wall surface 32j of the through hole 32h. This allows the lock pin 31 to move minutely in a plane perpendicular to the Z direction. That is, the lock pin 31 is not completely restrained from moving in the plane perpendicular to the Z direction within the through hole 32h. As a result, when a force is applied to the lock pin 31 in the plane, it is possible to prevent the lock pin 31 from being damaged. Note that the gap portion C2 includes the above-mentioned gap C1.

Here, in this embodiment, the buffer section 40 includes a gel-like buffer member 45 that is filled in the gap C2 of the through hole 32h and is provided so as to sandwich the nut 31e between the buffer member 44 and the buffer member 44. That is, as described above, when the outer circumferential edge 31g of the nut 31e collides with the cap portion 32b in the recess 32i, the outer circumferential edge 31g of the nut 31e collides with the cap portion 32b via the buffer member 45. Further, the buffer member 45 also enters the recess 32i. Note that the buffer member 45 is an example of a "fifth buffer member" in the claims.

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

In the present embodiment, as described above, the locking device 30 (regulating section) allows the parts included in the locking device 30 to It includes a buffer section 40 for mitigating the impact caused by a collision. This makes it possible to reduce the noise generated when the parts included in the locking device 30 collide with each other. As a result, it is possible to reduce the noise generated when the locked state in which movement of the door bodies (A, B) is regulated is released.

Moreover, in this embodiment, as mentioned above, the door closing device 100 is configured so that the buffer section 40 includes an elastic member. As a result, when releasing the locked state in which the movement of the door bodies (A, B) is regulated, the impact caused by the collision of the parts included in the locking device 30 (regulating part) is absorbed by the elastic deformation of the elastic member. , can be easily relieved. As a result, the noise generated when the parts included in the locking device 30 collide with each other can be further reduced.

Further, in this embodiment, as described above, the door closing device 100 is configured such that the buffer section 40 includes the buffer member 41 (first buffer member) provided at the tip end 33c of the shaft 33a on the pin holding member 32 side. Configure. Thereby, the noise generated when the tip 33c of the shaft 33a and the pin holding member 32 collide can be reduced by the buffer member 41.

Further, in this embodiment, as described above, the buffer member 41 (first buffer member) is held by the fixing part 41a (first part) fixed to the tip end 33c of the shaft 33a, and the fixing part 41a, The door closing device 100 is configured to include a contact portion 41b (second portion) provided between the pin holding member 32 and the fixed portion 41a. This reduces the noise generated when the tip 33c of the shaft 33a collides with the pin holding member 32 when releasing the locked state in which the movement of the door bodies (A, B) is regulated. This can be reduced by

Further, in this embodiment, as described above, the fixing part 41a (first part) is arranged to surround the holding surface 41c that holds the contact part 41b (second part), and The door closing device 100 is configured to include an annular side surface portion 41e extending from the surface 41c side to the pin holding member 32 side. As a result, since the side surface portion 41e is provided to extend from the holding surface 41c side to the pin holding member 32 side, even if the contact portion 41b is damaged or falls off from the fixing portion 41a, the side surface portion 41e holds the pin. The member 32 can be easily pressed. Further, since the side surface portion 41e is provided in an annular shape, the area of the surface of the side surface portion 41e that collides with the pin holding member 32 can be made relatively large, so that the door bodies (A, B) can be moved. It is possible to reduce the noise generated when the side surface portion 41e collides with the pin holding member 32 when releasing the locked state in which the pin holding member 32 is restricted. Further, since the contact portion 41b is held by the holding surface 41c, the contact portion 41b can be stably held.

Furthermore, in the present embodiment, as described above, the buffer portion 40 is arranged in the recess 32e (first recess) of the pin holding member 32, and the contact portion 41b (second recess) of the buffer member 41 (first buffer member). The door closing device 100 is configured to include a buffer member 42 (second buffer member) that comes into contact with the second buffer member. This reduces the noise generated when the tip 33c of the shaft 33a and the pin holding member 32 collide when the buffer member 42 releases the locked state in which movement of the door bodies (A, B) is restricted. This can be further reduced. Further, even if the contact portion 41b falls off, the buffer member 42 can reduce the noise generated when the tip portion 33c of the shaft 33a and the pin holding member 32 collide.

Further, in this embodiment, as described above, the door is arranged such that the portion of the contact portion 41b (second portion) that contacts the buffer member 42 (second buffer member) is formed into a substantially flat surface shape. A closing device 100 is configured. As a result, the contact portion 41b and the buffer member 42 can be brought into surface contact, so the movement of the door bodies (A, B) is restricted compared to the case where the contact portion 41b and the buffer member 42 are in point contact. It is possible to reduce the noise generated when unlocking the locked state.

Further, in this embodiment, as described above, the door closing device 100 is configured such that the buffer section 40 includes the buffer member 43 (third buffer member) provided between the stopper section 33e and the solenoid main body section 33b. Configure. As a result, the shock caused by the collision between the stopper part 33e and the solenoid main body part 33b can be alleviated by the buffer member 43, so that when the locked state in which movement of the door bodies (A, B) is regulated is released. In addition, noise generated by the collision between the stopper portion 33e and the solenoid body portion 33b can be reduced.

Further, in this embodiment, as described above, the buffer section 40 is a sheet-shaped buffer member 44 (fourth buffer member) provided to be sandwiched between the support surface 32g and the nut 31e (engaging member). The door closing device 100 is configured to include the following. Thereby, when releasing the locked state in which the movement of the door bodies (A, B) is regulated, the shock caused by the collision between the support surface 32g and the nut 31e can be alleviated by the buffer member 44. Noise generated by the collision between the support surface 32g and the nut 31e can be reduced.

Further, in this embodiment, as described above, the buffer portion 40 is filled in the gap C2 of the through hole 32h, and the nut 31e (engaging member) is sandwiched between the buffer member 44 (fourth buffer member). The door closing device 100 is configured to include the provided gel-like buffer member 45 (fifth buffer member). As a result, when the nut 31e is sandwiched between the buffer member 44 and the buffer member 45, the nut 31e is held inside the through hole 32h when releasing the locked state in which movement of the door body (A, B) is restricted. The impact caused by the collision between the inner wall surface 32j of the through hole 32h and the inner wall surface 32j of the through hole 32h can be alleviated. As a result, noise generated by the collision between the nut 31e and the inner wall surface 32j of the through hole 32h can be reduced.

In addition, in this embodiment, as described above, the buffer section 40 allows parts included in the locking device 30 (regulating section) to The door closing device 100 is configured to reduce the impact caused by the collision. Thereby, it is possible to reduce the noise generated when the locked state in which the movement of the door bodies (A, B) is regulated in the railway vehicle is released.

[Modified example]
Note that the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the description of the embodiments described above, and further includes all changes (modifications) within the meaning and range equivalent to the claims.

For example, in the embodiment described above, the buffer section 40 includes an elastic member, but the present invention is not limited thereto. If the buffer part has a lower hardness than metal, it does not need to include an elastic member.

Further, in the above embodiment, an example is shown in which the shaft 33a is linearly moved by the solenoid 33, but the present invention is not limited to this. Any mechanism other than a solenoid (for example, a hydraulic cylinder) may be used as long as it is a mechanism for linearly moving the shaft 33a.

Further, in the above embodiment, the buffer section 40 includes the buffer member 41 (first buffer member), the buffer member 42 (second buffer member), the buffer member 43 (third buffer member), and the buffer member 44 (second buffer member). Although an example including a buffer member 45 (fifth buffer member) and a buffer member 45 (fifth buffer member) is shown, the present invention is not limited thereto. The buffer section 40 includes a buffer member 41 (first buffer member), a buffer member 42 (second buffer member), a buffer member 43 (third buffer member), a buffer member 44 (fourth buffer member), and a buffer member 44 (fourth buffer member). It suffices if at least one of the member 45 (fifth buffer member) is included.

Further, in the above embodiment, an example was shown in which the contact portion 41b (second portion) is held by the fixing portion 41a (first portion), but the present invention is not limited to this. The contact portion 41b may be directly fixed to the shaft 33a.

Further, in the embodiment described above, an example was shown in which the side surface portion 41e of the fixing portion 41a (first portion) is formed in an annular shape, but the present invention is not limited to this. The side surface portion 41e may have a shape other than an annular shape. For example, the side surface portion 41e may include a plurality of linearly formed portions.

Further, in the above embodiment, an example was shown in which the buffer member 42 (second buffer member) is provided in the recess 32e of the pin holding member 32, but the present invention is not limited to this. The buffer member 42 (second buffer member) may be attached to the surface 32d of the pin holding member 32 on the Z2 direction side (see FIG. 6).

Further, in the above embodiment, an example was shown in which the portion (end surface 41f) of the contact portion 41b (second portion) that contacts the buffer member 42 (second buffer member) is formed into a flat surface shape. The present invention is not limited to this. The end surface 41f of the contact portion 41b (second portion) may have a shape other than a flat surface (for example, a spherical shape).

Further, in the above embodiment, an example was shown in which the locking device 30 (regulating section) restricts the movement of the door bodies (A, B) provided in the railway vehicle, but the present invention is not limited to this. The locking device 30 (regulating section) may be configured to restrict movement of a door provided in a vehicle other than a railway vehicle (for example, an elevator and a bus).

10 Drive source 27 Engagement body (door body fixing part)
30 Lock device (regulating part)
31 Lock pin (pin member)
31d End 31e Nut (engaging member)
32 Pin holding member 32d Surface 32e Recess (first recess)
32g Support surface 32h Through hole 32j Inner wall surface 33 Solenoid (shaft drive part)
33a Shaft 33b Solenoid body portion 33c Tip portion 33e Stopper portion 40 Buffer portion 41 Buffer member (first buffer member)
41a Fixed part (first part)
41b Contact part (second part)
41c Holding surface 41e Side part 42 Buffer member (second buffer member)
43 Buffer member (third buffer member)
44 Buffer member (4th buffer member)
45 Buffer member (fifth buffer member)
100 Door closing device A, B Door body C2 Gap part

Claims (11)

A drive source for opening and closing the door body,
a regulating part that regulates movement of the door body in the opening direction when the drive source is driven;
The regulation department is
By engaging with a door body fixing portion fixed to the door body, movement of the door body in the opening direction is restricted, and the door body is urged toward a position of engagement with the door body fixing portion. a pin member;
a pin holding member that holds the pin member and moves integrally with the pin member;
The pin member has a shaft, and by linearly moving the shaft and pressing the pin holding member, the pin holding member is moved in a direction away from the engagement position and is held by the pin holding member. a shaft drive unit that moves the shaft in a direction away from the engagement position;
As the pin member is moved in a direction away from the engagement position, the engagement state between the pin member and the door body fixing portion is released, thereby restricting movement of the door body. a buffer section for mitigating the impact caused by the collision of parts included in the regulating section when the locked state is released ;
The buffer section is
between the pin member and the pin holding member;
between the pin holding member and the shaft driving section;
A door closing device provided between parts of the shaft drive unit and at least one of the parts . The door closing device according to claim 1, wherein the buffer section includes an elastic member. The door closing device according to claim 1 or 2, wherein the buffer section includes a first buffer member provided at a tip end of the shaft on the pin holding member side. The first buffer member includes a first portion fixed to the tip end of the shaft, and a second portion held by the first portion and provided between the pin holding member and the first portion. The door closing device according to claim 3, comprising: The first portion includes a holding surface that holds the second portion, and an annular side surface that is arranged to surround the holding surface and extends from the holding surface side to the pin holding member side. The door closing device according to claim 4, comprising: A first recess is provided on a surface of the pin holding member on the first buffer member side,
The door closing device according to claim 4 or 5, wherein the buffer section includes a second buffer member disposed in the first recess of the pin holding member and abuts on the second portion of the first buffer member. The door closing device according to claim 6, wherein a portion of the second portion that comes into contact with the second buffer member is formed into a substantially flat surface. The shaft drive section is
A solenoid that has the shaft and a solenoid body into which the shaft is inserted, and that moves the shaft by the force of a magnetic field in the axial direction of the shaft;
The shaft is provided on the opposite side of the solenoid main body from the tip of the shaft on the pin holding member side, and movement of the shaft toward the pin holding member is restricted by the solenoid main body. a stopper portion that stops the pin from moving toward the pin holding member at a predetermined position;
The door closing device according to any one of claims 1 to 7, wherein the buffer section includes a third buffer member provided between the stopper section and the solenoid main body section. An engagement member that engages with the pin holding member is provided at an end of the pin member opposite to the door body fixing part,
The pin holding member includes a support surface that supports the engagement member from the door body side,
The door closing device according to any one of claims 1 to 8, wherein the buffer portion includes a sheet-shaped fourth buffer member provided to be sandwiched between the support surface and the engagement member. The pin holding member includes a through hole into which the end of the pin member is inserted and the engaging member provided at the end of the pin member is accommodated;
The through hole is provided with a gap between the engaging member and an inner wall surface of the through hole,
The door according to claim 9, wherein the buffer portion includes a gel-like fifth buffer member that is filled in the gap portion of the through hole and is provided so that the engagement member is sandwiched between the fourth buffer member and the fourth buffer member. Closing device. Any one of claims 1 to 10, wherein the buffer section alleviates a shock caused by a collision between parts included in the restriction section when the locked state of the door body provided on the railway vehicle is released. The door closing device described in section.

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