Door opening and closing device

Abstract

The door opening and closing device of an embodiment of the present invention comprises: a reducer (31) having an output shaft (30) for outputting a rotational force; a drive pulley (33) having a drive shaft (33a) for receiving the rotational force of the output shaft to open and close the door; a rod (62) connected to a latch for releasing the lock of the door; and a transmission mechanism (100) that can transmit the output of the output shaft to the rod (62) and the drive pulley (33). The transmission mechanism (100) comprises: an internal threaded part (101) which is connected to the output shaft in a manner that allows it to rotate around the output shaft and to move in the axial direction along the output shaft; an external threaded part (102) which is connected to the drive shaft (33a) in a manner that allows it to rotate around the drive shaft (33a); and a transmission member (103) which transmits the forward force generated when the internal threaded part (101) receives the rotational force output by the output shaft and moves while meshing with the external threaded part (102) at the fully closed position of the door to the rod (62).

Description

Technical Field

[0001] The invention relates to a door opening and closing device. Background Art

[0002] Conventionally, there is known a door opening and closing device that can open and close a door.

[0003] For example, Patent Document 1 discloses a structure including: a fixed beam fixed to a frame; a movable beam to which a door is connected and which can move laterally relative to the fixed beam; and a motor fixed to the movable beam to move the door.

[0004] The motor extends in the lateral direction. The housing (driving cam) of the motor has a groove for engaging a pin fixed to the fixed beam. The groove is formed in a spiral shape along the outer circumference of the housing. When the door is locked, the pin fixed to the fixed beam is held in a fixed position in the groove by the elastic force of the spring.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: International Publication No. 2014 / 154964 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] However, in the case of a structure in which a pin is provided to engage with the groove and the motor itself is rotated so that the pin engages with the groove to lock the door, the freedom of selection and configuration of the motor is limited. Therefore, there is room for improvement in terms of increasing the freedom of selection and configuration of the motor (drive source).

[0010] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a door opening and closing device capable of improving the degree of freedom in selecting and configuring a drive source.

[0011] Solutions for solving problems

[0012] (1) A door opening and closing device according to one embodiment of the present invention comprises: a driving member having an output shaft for outputting a rotational force transmitted from a driving source; a rotating member having a rotational shaft for receiving the rotational force of the output shaft to open and close the door; a connecting member connected to an unlocking portion for releasing the lock of the door; and a transmission mechanism capable of transmitting the output of the output shaft to the connecting member and the rotating member. The transmission mechanism comprises: one of the external threaded member and the internal threaded member connected to the output shaft in a manner that can rotate around the output shaft and can move in the axial direction of the output shaft; the other of the internal threaded member and the external threaded member connected to the rotating shaft in a manner that can rotate around the rotating shaft; and a transmission member that transmits the forward force of the one threaded member when the one threaded member and the other threaded member move while meshing with each other in response to the rotational force output by the output shaft at the fully closed position of the door to the connecting member, thereby operating the unlocking portion. The transmission mechanism transmits the rotation of the output shaft to the rotating shaft via the one screw member and the other screw member after the door is unlocked by the unlocking portion, thereby opening the door.

[0013] According to this structure, the forward force of one screw member is transmitted to the unlocking part by means of the transmission member and the connecting member, thereby releasing the door lock. After the door lock is released by the unlocking part, the rotation of the output shaft can be transmitted to the rotating shaft by means of one screw member and another screw member. Thus, the door can be opened, and therefore, no research on the drive source is required. Therefore, the freedom of selection and configuration of the drive source can be improved.

[0014] (2) In the door opening and closing device described in (1) above, the transmission member may convert the force of the one screw member moving in the axial direction into a force in a rotational direction around the output shaft and transmit the force to the connecting member.

[0015] (3) In the door opening and closing device described in (2) above, the transmission mechanism may also include a fixing pin that is fixed so as to be immovable. The transmission member may be connected to the one threaded member in a manner that allows relative rotation with respect to the one threaded member about the output shaft. The transmission member may have an opening that extends obliquely with respect to the axial direction. The fixing pin may be engaged with the opening. The one threaded member may advance in the axial direction and push the transmission member, and the transmission member may rotate relative to the one threaded member, thereby converting the force of the one threaded member when it moves in the axial direction into a force in the rotation direction about the output shaft.

[0016] (4) In the door opening and closing device described in any one of (1) to (3) above, the transmission member may be connected to the one screw member via a bearing so as to be rotatable relative to the one screw member. The one screw member may include a pressing portion that presses the bearing when advancing in the axial direction.

[0017] (5) In the door opening and closing device described in any one of (1) to (4) above, the rotating shaft may be a driving shaft of a driving pulley that drives a belt for opening and closing the door. Alternatively, after the door is unlocked, when the one threaded member abuts against the driving pulley and cannot move forward, the rotation of the output shaft is transmitted to the driving shaft via the one threaded member and the other threaded member, and the rotation of the driving shaft is transmitted to the belt, thereby causing the door to open.

[0018] (6) In the door opening and closing device described in any one of (1) to (5) above, the connecting member may include: a cylinder connected to the unlocking portion; and a piston connected to the transmission member. The piston may be connected to an elastic member that applies an elastic force to the piston. The piston may move to overcome the elastic force and abut against the cylinder, and the cylinder and the piston may move together by a predetermined distance or more, thereby releasing the lock of the door.

[0019] (7) In the door opening and closing device described in any one of (1) to (6) above, the rotating shaft may be a driving shaft of a driving pulley that drives a belt for opening and closing the door. Alternatively, when the rotation direction of the output shaft becomes a rotation in the opposite direction to the door opening action, and the one threaded member moves in the opposite direction to the forward movement direction and abuts against the driving member, the rotation of the output shaft in the opposite direction is transmitted to the driving shaft via the one threaded member and the other threaded member, so that the rotation of the driving shaft in the opposite direction to the door opening action is transmitted to the belt, thereby causing the door to close.

[0020] (8) In the door opening and closing device described in any one of (1) to (7) above, the rotating shaft may rotate on the same axis as the output shaft. The one threaded member may be the internal threaded member rotating on the same axis as the output shaft. The other threaded member may be the external threaded member rotating on the same axis as the output shaft.

[0021] (9) A door opening and closing device according to one embodiment of the present invention comprises: a driving member having an output shaft for outputting a rotational force transmitted from a driving source; a rotating member having a rotational shaft for receiving the rotational force of the output shaft to open and close the door; a connecting member connected to an unlocking portion for releasing the lock of the door; and a transmission mechanism capable of transmitting the output of the output shaft to the connecting member and the rotating member. The transmission mechanism comprises: one of the external thread member and the internal thread member connected to the output shaft in a manner that allows rotation about the output shaft; the other of the internal thread member and the external thread member connected to the rotating shaft in a manner that allows rotation about the rotating shaft and movement in the axial direction of the rotating shaft; and a transmission member that transmits the forward force of the other thread member when the one thread member and the other thread member move while meshing with each other in response to the rotational force output by the output shaft at the fully closed position of the door to the connecting member, thereby operating the unlocking portion. The transmission mechanism transmits the rotation of the output shaft to the rotating shaft via the one screw member and the other screw member after the door is unlocked by the unlocking portion, thereby opening the door.

[0022] According to this structure, the forward force of the other threaded member is transmitted to the unlocking part by means of the transmission member and the connecting member. Thus, the door is unlocked. After the door is unlocked by the unlocking part, the rotation of the output shaft is transmitted to the rotating shaft by means of one threaded member and the other threaded member, so that the door can be opened. Therefore, there is no need to conduct any research on the drive source. Therefore, the freedom of selection and configuration of the drive source can be improved.

[0023] Effects of the Invention

[0024] According to the present invention, it is possible to provide a door opening and closing device capable of improving the degree of freedom in selecting and arranging a drive source. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a perspective view of the door opening and closing device according to the first embodiment.

[0026] Figure 2 This is a perspective view of the surrounding area including the locking mechanism of the first embodiment.

[0027] Figure 3 This is a perspective view of the surrounding area including the rotating body and the supporting body according to the first embodiment.

[0028] Figure 4 It is an explanatory diagram of the operation of the restraining member according to the first embodiment.

[0029] Figure 5It is a perspective view of the periphery including a cross section of the transmission mechanism of the first embodiment cut along the YZ plane.

[0030] Figure 6 This is a perspective view of the periphery including a cross section of the transmission mechanism according to the first embodiment cut along the XY plane.

[0031] Figure 7 This is a perspective view of the surrounding area including the fixing pin according to the first embodiment.

[0032] Figure 8 This is a perspective view including a cross section of the rod according to the first embodiment.

[0033] Fig. 9 This is a perspective view for explaining the operation of the transmission mechanism according to the first embodiment.

[0034] Fig.10 This is another perspective view for explaining the operation of the transmission mechanism according to the first embodiment.

[0035] Fig.11 It is a perspective view of the surrounding area including a cross section of the transmission mechanism according to the second embodiment cut along the XY plane.

[0036] Fig.12 It is a perspective view of the surrounding area including the fixing pin according to the second embodiment.

[0037] Fig.13 It is an explanatory diagram of the arrangement of the output shaft and the rotating shaft according to a modified example of the embodiment.

[0038] Description of Reference Numerals

[0039] 1. Door opening and closing device; 2. Door; 6. Driving source; 9. Latch (unlocking part); 30, 330. Output shaft; 31, 331. Speed ​​reducer (driving member); 32. Belt; 33, 333. Driving pulley (rotating member); 33a, 333a. Driving shaft (rotating shaft); 62. Rod (connecting member); 100, 200. Transmission mechanism; 101. Internal threaded member (one threaded member between the external threaded member and the internal threaded member); 101b. Pushing part; 102. External threaded member (the other threaded member between the external threaded member and the internal threaded member); 103. Transmission member; 103c. Opening; 107. Fixing pin; 108. Bearing; 120. Cylinder; 121. Piston; 122. Spring pin (elastic member). DETAILED DESCRIPTION

[0040] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0041] In the following embodiments, as a door opening and closing device, an example of a pair of double-pull doors for opening and closing the boarding and alighting entrance of a railway vehicle (vehicle) is cited for description. In the following description, expressions such as "parallel", "orthogonal", "center", "coaxial", etc., which indicate relative or absolute configurations, not only refer to configurations strictly like this, but also include states of relative displacement at angles and distances with tolerances, degrees of obtaining the same functions. In addition, in the drawings used in the following description, the scales of the components are appropriately changed to make the components recognizable.

[0042] <First embodiment>

[0043] Figure 1 It is a perspective view of the door opening and closing device according to the first embodiment.

[0044] like Figure 1 As shown, the door opening and closing device 1 includes a pair of doors 2, a fixed base 3, a sliding base 4, and a guide rail 5 (see Figure 2 ), driving source 6, restraining member 7 and locking mechanism 8.

[0045] In addition, Figure 1 In FIG, a pair of doors 2 are indicated by double-dotted lines. Figure 1 , indicating a state where the door 2 is in the fully closed position.

[0046] In the following description, the orthogonal coordinate system of X, Y, and Z is used as needed. The X direction coincides with the front-rear direction of the vehicle. The Y direction coincides with the width direction of the vehicle. The Z direction indicates the height direction (gravity direction) of the vehicle orthogonal to the X direction and the Y direction.

[0047] In the X, Y, and Z directions, the arrow side in the figure is set as the positive (+) side, and the side opposite to the arrow is set as the negative (-) side for description. Therefore, the +Y side corresponds to the outer side in the width direction, and the -Y side corresponds to the inner side in the width direction. The +Z side corresponds to the upper side in the gravity direction, and the -Z side corresponds to the lower side in the gravity direction.

[0048] The door opening and closing device 1 supports the door 2 in such a manner that the outer surface of the vehicle body side wall is flush with the outer surface of the door 2 when the door 2 is in the fully closed position. The door 2 includes a door leaf 10 and a door hanger 11 connected to the door leaf 10. The door 2 is mounted on the sliding base 4. The door hanger 11 is supported on the sliding base 4 in a state where it can move relative to the sliding base 4 in the front-rear direction.

[0049] The fixed base 3 is fixed to the vehicle body. The vehicle body is a frame constituting the skeleton of the vehicle. The fixed base 3 is provided above the vehicle boarding and alighting port 15. The fixed base 3 extends in the front-to-back direction in a manner spanning the upper edge of the boarding and alighting port 15. The two ends of the fixed base 3 in the front-to-back direction are respectively connected to the track base 9 extending in the width direction.

[0050] The sliding base 4 slides relative to the fixed base 3 in the width direction by the driving force from the driving source 6, thereby moving the door 2 in the width direction. The sliding base 4 is arranged below the fixed base 3. The sliding base 4 extends in the front-to-back direction along the upper edge of the boarding and alighting entrance 15. Both ends of the sliding base 4 in the front-to-back direction are arranged to be movable in the width direction along the track base 9.

[0051] Figure 2 This is a perspective view of the surrounding area including the locking mechanism of the first embodiment. Figure 3 This is a perspective view of the surrounding area including the rotating body and the supporting body according to the first embodiment.

[0052] like Figure 2 As shown, the guide rail 5 is divided into a boarding and alighting entrance 15 for vehicles (see Figure 1 ) is an opening and closing path 20 of the door 2 for opening and closing. The guide rail 5 is provided above the boarding and alighting entrance 15. The guide rail 5 is supported by a fixed base 3 (refer to Figure 1 The guide rail 5 is mounted on the fixed base 3 by using a plurality of fastening members such as bolts.

[0053] The opening and closing path 20 includes a straight portion 21 along the front-rear direction and an inclined portion 22 inclined relative to the straight portion 21. A connecting portion 23 between the straight portion 21 and the inclined portion 22 is curved in an arc shape. Figure 2 In FIG. 2 , a part of the straight line portion 21 is indicated by a two-dot chain line.

[0054] like Figure 1 As shown, the drive source 6 outputs a driving force for moving the door 2. For example, the drive source 6 is a motor. The output shaft of the motor rotates around an axis along the front-to-back direction. For example, the output shaft of the motor is configured to be rotatable in one direction and the other direction around an axis along the front-to-back direction (rotatable forward and reverse). The drive source 6 is connected to a movable power cable 29, a so-called cable drag chain (registered trademark). The drive source 6 is supported on the sliding base 4 by means of a transmission mechanism or the like. The drive source 6 is configured to be movable in the width direction as the sliding base 4 moves in the width direction.

[0055] Figure 5 It is a perspective view of the periphery including a cross section of the transmission mechanism of the first embodiment cut along the YZ plane.

[0056] like Figure 5 As shown, the door opening and closing device 1 includes: a speed reducer 31 (an example of a driving member) having an output from a driving source 6 (see Figure 1) output shaft 30 for receiving the rotational force transmitted by the output shaft 30; a driving pulley 33 (an example of a rotating member) having a driving shaft 33a (an example of a rotating shaft) for receiving the rotation of the output shaft 30 to open and close the door; a rod 62 (an example of a connecting member, see Figure 1 ), which is used to release the latch 9 (an example of an unlocking unit, see Figure 2 and a transmission mechanism 100, which can transmit the output of the output shaft 30 to the rod 62 and the drive pulley 33.

[0057] like Figure 1 As shown in FIG. 1 , the reducer 31 reduces the speed of the driving force from the driving source 6 and outputs the reduced speed. The reducer 31 also functions as a power conversion mechanism that converts the direction of the driving force from the driving source 6. The reducer 31 converts the rotation of the output shaft of the motor around the axis along the front-rear direction into the rotation around the axis along the width direction. Figure 5 As shown, the reducer 31 is connected to the slide base 4 via a bracket 80 .

[0058] The drive shaft 33a rotates on the same axis as the output shaft 30. The drive pulley 33 is rotatable around an axis along the width direction on the same axis as the output shaft 30. The drive pulley 33 is provided on the -X side of the slide base 4. The drive pulley 33 is connected to the slide base 4 by means of a bearing 82 and a bracket 83 so as to be rotatable around an axis along the width direction on the same axis as the output shaft 30.

[0059] like Figure 1 As shown, in the front-rear direction of the slide base 4, a driven pulley 34 is provided on the side opposite to the driving pulley 33 (i.e., the +X side of the slide base). The driven pulley 34 is rotatable about an axis parallel to the driving axis of the driving pulley 33 (axis along the width direction).

[0060] A belt 32 for opening and closing the door 2 is mounted on the driving pulley 33 and the driven pulley 34. The belt 32 moves (revolves) around the driving pulley 33 and the driven pulley 34 in conjunction with the rotation of the driving pulley 33. The door hanger 11 is connected to the belt 32. Therefore, the door hanger 11 moves in the front-rear direction as the belt 32 moves.

[0061] In addition, a connecting member 35 is installed on the belt 32 so as to move along with the movement of the belt 32. Figure 3 As shown, the connecting member 35 supports a rotating member 36 and a supporting member 37 .

[0062] For example, the rotating member 36 is a roller that rolls along the opening and closing path 20. The rotating member 36 is driven by a driving source 6 (see Figure 1 ) driving force and gate 2 (reference Figure 1 ) move as one.

[0063] The rotor 36 rolls along the opening and closing path 20 while being guided by the guide rail 5 when the door 2 is opened and closed. The rotor 36 is rotatably connected to the connecting member 35 about an axis extending in the height direction. The rotor 36 is formed into a circular shape when viewed from the height direction.

[0064] like Figure 1 As shown, the door 2 on the −X side of the pair of doors 2 is connected to the upper portion of the belt 32 via the door hanger 11 and the connecting member 35 . On the other hand, the door 2 on the +X side is connected to the lower portion of the belt 32 via the door hanger 11 .

[0065] As described above, the belt 32 is mounted on the driving pulley 33 and the driven pulley 34, which are located at positions separated from each other in the front-to-back direction. Therefore, the upper part and the lower part of the belt 32 move in the opposite directions in the front-to-back direction. Therefore, when the belt 32 moves, the door 2 and the connecting member 35 on the -X side and the door 2 on the +X side move in the opposite directions in the front-to-back direction.

[0066] The driving force from the driving source 6 is transmitted to the belt 32, and the door hanger 11 and the connecting member 35 connected to the belt 32 move, so that the pair of doors 2 are moved from Figure 1 The fully closed position shown (a position where the outer surface of the vehicle body side wall is flush with the outer surface of the door 2) moves to the fully open position.

[0067] The fully open position refers to a position where the pair of doors 2 opens the entrance 15 (fully open) and the pair of doors 2 are outside the vehicle. Figure 1 In the example, the door 2 on the -X side first moves from the fully closed position to the outer side in the width direction (specifically, including the inclined movement in the width direction), and then moves straightly in the -X direction to reach the fully open position. On the other hand, the door 2 on the +X side first moves from the fully closed position to the outer side in the width direction (specifically, including the inclined movement in the width direction), and then moves straightly in the +X direction to reach the fully open position.

[0068] In addition, the driving method of the door is not limited to the so-called belt type in which the door opening and closing device includes the above-mentioned belt 32.

[0069] For example, the door driving method may be a so-called screw method or a so-called rack and pinion method, and can be appropriately changed according to required specifications.

[0070] The screw method is a method in which a motor rotates a screw shaft equivalent to a bolt to open and close a door mounted on a ball nut equivalent to a nut. The rack and pinion method is a method in which a motor rotates a gear of a rack and pinion mechanism to open and close a door mounted on a rack track.

[0071] like Figure 3As shown, the support member 37 extends upward from the connecting member 35. For example, the support member 37 is a pin extending in the height direction. The support member 37 is driven by the drive source 6 (see Figure 1 ) driving force and gate 2 (reference Figure 1 The support member 37 is provided separately from the rotating member 36 so as not to contact the guide rail 5 when the door 2 is opened or closed.

[0072] The restraining member 7 is on the door 2 (refer to Figure 1 ) constrains the rotating member 36 at the fully closed position of the guide rail 5. The constraining member 7 is arranged offset relative to the guide rail 5 in the height direction. The constraining member 7 is provided below the guide rail 5. The constraining member 7 is provided to be rotatable around a shaft 39 extending in the height direction.

[0073] The upper part of the shaft 39 is fixed to the guide rail 5. Figure 2 As shown, a torsion spring 40 (elastic member) is wound around the shaft 39 .

[0074] Hereinafter, the position where the door is not restrained is referred to as the “unrestrained position”, and the position where the rotor 36 is restrained at the fully closed position of the door 2 is referred to as the “restrained position”. The restrained position is the same position as the fully closed position of the door 2. Figure 1 to Figure 3 The position of the restraining member 7 shown and Figure 4 The position of the restraining member 7 indicated by a solid line represents the restraining position. Figure 4 The position of the restraining member 7 indicated by the double-dashed line represents the non-restrained position.

[0075] The torsion spring 40 keeps the restraining member 7 in the non-restraining position ( Figure 4 An elastic force is applied to the restraining member 7 in the manner of the double-dotted line position).

[0076] The restraining member 7 is held in the non-restraining position ( Figure 4 Hereinafter, the direction in which the door 2 is closed is referred to as a "closing direction".

[0077] The closing direction refers to the movement direction of the door 2 from the fully open position to the fully closed position. When the door 2 is closed from the fully open position, it first moves straightly in the front-to-back direction, and then moves inward in the width direction (specifically, it also includes inclined movement in the width direction). In this way, when the door 2 moves in the closing direction, the movement direction changes between the initial stage and the final stage.

[0078] In each of the drawings, the direction in which the door 2 on the −X side of the pair of doors 2 is closed is referred to as a closing direction, which is indicated by an arrow Vc direction (specifically, a component of the closing direction along the front-rear direction).

[0079] When the rotating member 36 moves in the closing direction Vc along the opening and closing path 20, the restraining member 7 is pressed by the rotating member 36, thereby moving from the non-restraining position ( Figure 4 The double-dotted line position) to the constraint position ( Figure 4 The position of the solid line) moves.

[0080] like Figure 2 As shown, the restraining member 7 includes a first arm 41 and a second arm 42 arranged in sequence along the closing direction Vc. The first arm 41 and the second arm 42 are connected to each other in a U-shaped manner when viewed from the height direction. Figure 4 In the case where the first arm 41 does not cross the closed path 20, the second arm 42 crosses the closed path 20. When the restraining member 7 is located at the restraining position ( Figure 4 In the case of the solid line position), the first arm 41 and the second arm 42 cross the closed path 20.

[0081] like Figure 4 As shown, when the restraining member 7 is located at the non-restraining position, the first arm 41 is arranged at a position avoiding the opening and closing path 20 ( Figure 4 When the restraining member 7 is located at the non-restraining position, the +Y side end of the first arm 41 is located closer to the −Y side than the opening and closing path 20 .

[0082] The first arm 41 has a restraining wall 43 which is inclined toward the closing direction Vc when viewed from the height direction when the restraining member 7 is in the non-restraining position. The restraining wall 43 is a wall that restrains the support member 37 (see FIG. 1 ) at the fully closed position of the door 2. Figure 3 The restraining wall 43 constitutes the inner surface of the groove 44 formed in the first arm 41.

[0083] The second arm 42 is arranged to be separated from the first arm 41 in the closing direction Vc. The second arm 42 has a first surface 45 which is formed when the restraining member 7 is in the non-restraining position ( Figure 4 and the second surface 46, which is located in the restraining position (the double-dotted line position) when the inclined portion 22 is perpendicular; and the second surface 46, which is located in the restraining position ( Figure 4 The solid line position) is perpendicular to the inclined portion 22.

[0084] The first surface 45 is connected to the second surface 46 in a manner inclined toward the +X direction relative to the second surface 46 when viewed from the height direction. Figure 4 The first surface 45 crosses the +Y side of the inclined portion 22 (the portion not crossed by the second surface 46) when the restraining member 7 is in the restraining position ( Figure 4When the restraining member 7 is located at the restraining position, the first surface 45 is arranged at a position closer to the +X side than the inclined portion 22.

[0085] The second surface 46 constitutes the inner surface of the U-shaped opening 47 formed in the restraining member 7. The second surface 46 is located in the non-restraining position ( Figure 4 The second surface 46 crosses the -Y side of the inclined portion 22 (the portion not crossed by the first surface 45) when the restraining member 7 is in the restraining position ( Figure 4 The solid line position) crosses the inclined portion 22 as a whole.

[0086] The restraining member 7 includes a held portion 48 held by the locking mechanism 8. The held portion 48 is provided on the opposite side of the portion (e.g., the portion provided with the second arm 42) of the restraining member 36 across the shaft 39. The held portion 48 extends in a direction orthogonal to the shaft 39 when viewed from the height direction. The held portion 48 is provided when the restraining member 7 is in the restraining position ( Figure 4 In the case of the solid line position), the held portion 48 extends toward the -X direction from the portion close to the shaft 39. The held portion 48 and the restraining member 7 are formed integrally with the same member.

[0087] The restraining member 7 is provided with a pressing member 50 that presses a switch 51 when the restraining member 7 is located at the restraining position. For example, the switch 51 is a switch that detects that the door 2 is locked at the fully closed position.

[0088] The pressing member 50 is provided on the side in the closing direction Vc relative to the shaft 39. The pressing member 50 is provided on the side opposite to the held portion 48 across the shaft 39.

[0089] The pressing member 50 is installed in a detachable manner relative to the restraining member 7. The pressing member 50 has a long hole 52 along the rotation direction (circumferential direction of the shaft 39) of the restraining member 7. The pressing member 50 is installed on the restraining member 7 using a plurality of (for example, two in this embodiment) bolts 53 arranged along the long hole 52.

[0090] The locking mechanism 8 remains in the restraining position ( Figure 4 The position of the solid line) is a constraint member 7. Figure 2 As shown, the locking mechanism 8 has a locking mechanism 8 which utilizes a drive source 6 (see Figure 1 ) is driven by a lever 59. The lever 59 is provided with an arm 61 and a rod 62 (see Figure 1 )'s connecting rod mechanism 60 is connected to the driving source 6.

[0091] When the restraining member 7 moves to the restraining position, the lever 59 is pressed by the held portion 48 of the restraining member 7 (specifically, a portion extending upward from the top end of the held portion 48). Figure 2 Therefore, the latch 9 inside the locking mechanism 8 is locked, and the held portion 48 of the restraining member 7 is supported by the lever 59. Thus, at the fully closed position of the door 2, the rotating member 36 and the supporting member 37 are restrained by the restraining member 7. Thus, the door 2 is locked (locked state).

[0092] On the other hand, when the arm 61 is pulled by the driving force from the driving source 6, the latch 9 inside the locking mechanism 8 is unlocked, and the lever 59 moves along the same direction as the arm 61. Figure 2 Therefore, the held portion 48 of the restraining member 7 is released from the support of the lever 59. As a result, the restraining member 7 is moved to the non-restrained position ( Figure 4 Thus, the restraint of the restraining member 7 on the rotating member 36 and the supporting member 37 is released, and the lock of the door 2 is released (unlocked state).

[0093] Figure 4 1 is an explanatory diagram of the operation of the restraining member 7 according to the first embodiment. Figure 4 In FIG. 1 , the restraining member 7 located at the restraining position is indicated by a solid line, and the restraining member 7 located at the non-restraining position is indicated by a two-dot chain line.

[0094] The elastic force from the torsion spring 40 is always applied to the restraining member 7. Therefore, in a state where no external force is applied to the restraining member 7, the restraining member 7 is maintained in the non-restrained position ( Figure 4 When the restraining member 7 is in the non-restraining position, the rotating member 36 and the supporting member 37 can utilize the power from the driving source 6 (refer to Figure 1 )'s driving force moves integrally with the door 2.

[0095] Rotating member 36 (refer to Figure 3 ) When the door 2 is opened or closed, the rotating member 36 is guided by the guide rail 5 and rolls along the opening and closing path 20. Specifically, when the door 2 is closed from the fully open position, the rotating member 36 first moves along the straight portion 21 (refer to Figure 2 ) moves straightly, and then moves inward in the width direction along the inclined portion 22 (specifically, including the inclined movement in the width direction). In this way, the rotating member 36 changes its movement direction in the initial stage and the final stage during the movement in the closing direction.

[0096] On the other hand, the support member 37 (see Figure 3) moves along a path separated downward from the opening and closing path 20 in a manner that does not contact the guide rail 5 when the door 2 is opened or closed.

[0097] When the rotating member 36 moves in the closing direction Vc along the opening and closing path 20, the rotating member 36 first engages with the second arm 42 ( Figure 4 Then, when the rotating member 36 moves further in the closing direction Vc along the opening and closing path 20, the rotating member 36 overcomes the elastic force of the torsion spring 40 and pushes the second arm 42 in the closing direction Vc. The second arm 42 is pushed in the closing direction Vc by the rotating member 36, so that the restraining member 7 is moved from the non-restraining position ( Figure 4 The double-dotted line position) to the constraint position ( Figure 4 The position of the solid line) moves (rotates).

[0098] When the restraining member 7 moves to the restraining position ( Figure 4 When the lever 59 moves along the solid line position, the lever 59 is pressed by the held portion 48 of the restraining member 7. Figure 2 The locking mechanism 8 moves in the direction of the arrow Lm. Therefore, the latch 9 inside the locking mechanism 8 is locked. Due to the locking of the latch 9, the locking mechanism 8 utilizes the lever 59 (refer to Figure 2 ) holds the retained portion 48 of the restraining member 7 located in the fully closed position (restraint position) of the door 2.

[0099] When the restraining member 7 is located at the restraining position, the first arm 41 and the second arm 42 respectively cross the closed path 20. Figure 3 As shown, the first arm 41 restricts the rotation member 36 and the support member 37 from moving in the direction opposite to the closing direction Vc along the opening and closing path 20 when the restraining member 7 is in the restraining position. The second arm 42 restricts the rotation member 36 from moving further in the direction of the arrow Vc along the opening and closing path 20 when the restraining member 7 is in the restraining position.

[0100] The restraining wall 43 of the first arm 41 restrains the support 37 from moving in the direction opposite to the arrow Vc when the restraining member 7 is located at the restraining position.

[0101] Thus, the rotating member 36 and the supporting member 37 are restrained by the restraining member 7 at the fully closed position of the door 2. As the rotating member 36 and the supporting member 37 are restrained by the restraining member 7, the door 2 is locked (locked state).

[0102] When the restraining member 7 is located at the restraining position, the switch 51 is pressed by the pressing member 50 (see Figure 4 ). Thus, it is detected that the door 2 is locked at the fully closed position.

[0103] On the other hand, when the door 2 is changed from the locked state to the unlocked state, the arm 61 is pulled by the driving force from the driving source 6 (see Figure 2 ). As a result, the latch 9 inside the locking mechanism 8 is unlocked, and the lever 59 moves along the Figure 2 Therefore, the held portion 48 of the restraining member 7 is released from the support of the lever 59. As a result, the restraining member 7 is moved to the non-restrained position ( Figure 4 The restraint of the restraining member 7 is released, so that the rotating member 36 and the supporting member 37 (refer to Figure 3 ) can be moved in the direction opposite to the closing direction Vc along the opening and closing path 20. Thus, the lock of the door 2 is released (unlocked state).

[0104] Figure 6 It is a perspective view of the periphery including a cross section of the transmission mechanism 100 according to the first embodiment cut along the XY plane. Figure 7 It is a perspective view of the surrounding area including the fixing pin 107 according to the first embodiment.

[0105] like Figure 6 As shown, the transmission mechanism 100 includes an internal thread 101 (an example of one of the external thread and the internal thread), a external thread 102 (an example of the other of the external thread and the internal thread), and a transmission member 103 .

[0106] The internal thread member 101 rotates on the same axis as the output shaft 30. The internal thread member 101 is connected to the output shaft 30 in a manner that it can rotate around the output shaft 30 and can move in the axial direction along the output shaft 30. The internal thread member 101 is formed in a cylindrical shape extending in the axial direction along the output shaft 30. A threaded portion 101a that meshes with the external thread member 102 is provided on the inner periphery of the +Y side portion of the internal thread member 101.

[0107] A sleeve 104 extending in the axial direction of the output shaft 30 is fixed to the output shaft 30. The sleeve 104 includes a sleeve body 104a extending in the axial direction of the output shaft 30 and a flange 104b protruding radially outward (outward in a direction orthogonal to the axial direction) from the -Y side of the sleeve body 104a.

[0108] The outer periphery of the sleeve 104 and the inner periphery of the internal thread member 101 are fitted to each other by splines via the balls 105 .

[0109] A plurality of grooves 104c (hereinafter also referred to as "sleeve side grooves 104c") are provided on the outer periphery of the sleeve 104 at a portion located closer to the +Y side than the flange 104b. The plurality of grooves 104c extend parallel to the axial direction of the output shaft 30 and are arranged in the circumferential direction.

[0110] A plurality of grooves 101c (hereinafter also referred to as "internal thread side grooves 101c") are provided on the inner circumference of the internal thread member 101 at a portion located closer to the -Y side than the threaded portion 101a. The plurality of grooves 101c extend parallel to the axial direction of the output shaft 30 and are arranged in the circumferential direction.

[0111] Balls 105 are fitted in the sleeve side groove 104c and the internal thread member side groove 101c. A plurality of balls 105 are provided between the outer periphery of the sleeve 104 and the inner periphery of the internal thread member 101 (in Figure 6 In the example, two are arranged in the axial direction in each groove). In the ball 105, the portion on the output shaft 30 side is engaged with the sleeve side groove 104c. In the ball 105, the portion on the side opposite to the output shaft 30 is engaged with the internal thread member side groove 101c. When the internal thread member 101 rotates around the output shaft 30, or when the internal thread member 101 moves in the axial direction along the output shaft 30, the ball 105 rolls in each groove.

[0112] In addition, the outer periphery of the sleeve 104 and the inner periphery of the internal thread member 101 are not limited to being fitted to each other by splines via the balls 105 .

[0113] For example, the outer periphery of the sleeve 104 and the inner periphery of the internal thread member 101 may be engaged with each other by splines without interposing the balls 105. For example, the sleeve 104 may not be fixed to the output shaft 30. For example, the internal thread member 101 may be connected to the output shaft 30 in a manner that is rotatable about the output shaft 30 and movable in the axial direction of the output shaft 30.

[0114] The external thread 102 rotates on the same axis as the output shaft 30. The external thread 102 is connected to the drive shaft 33a so as to be rotatable around the drive shaft 33a of the drive pulley 33. The external thread 102 is provided on the same axis as the drive shaft 33a. A threaded portion 102a meshing with the internal thread 101 is provided on the outer periphery of the external thread 102.

[0115] The transmission member 103 converts the force of the internal thread 101 when it moves in the axial direction of the output shaft 30 into a force in the rotation direction around the output shaft 30 and transmits it to the rod 62. The transmission member 103 is connected to the internal thread 101 so as to be rotatable relative to the internal thread 101 around the output shaft 30.

[0116] The transmission member 103 includes a transmission portion body 103 a extending in the axial direction along the output shaft 30 , and a transmission arm 103 b extending radially outward (outward in a direction orthogonal to the axial direction) from the transmission portion body 103 a .

[0117] The transmission part body 103a is arranged between the speed reducer 31 and the driving pulley 33 in the axial direction along the output shaft 30. The transmission part body 103a is arranged in a manner spaced apart from the speed reducer 31 and the driving pulley 33 in the axial direction along the output shaft 30. The transmission part body 103a is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the flange 104b of the sleeve 104.

[0118] The transmission arm 103b extends radially outward from the -Y side of the transmission portion main body 103a. Figure 6 In the state, the transmission arm 103b extends obliquely from the +Z side portion of the transmission portion main body 103a so as to be located on the +X side as it goes toward the +Z side.

[0119] A −Y side portion of a transmission shaft 106 extending in the Y direction is connected to a tip portion of the transmission arm 103 b (a portion farthest from the transmission portion main body 103 a in the radial direction outward).

[0120] like Figure 7 As shown in FIG. 1 , the transmission member 103 has an opening 103c extending obliquely with respect to the axial direction along the output shaft 30. The opening 103c is a through hole opened in the transmission portion body 103a in the radial direction (direction orthogonal to the axial direction). Figure 7 In the state, the opening 103c extends obliquely (curves) from the vicinity of the +Y end of the transmission unit main body 103a so as to be located on the -X side along the outer circumference of the transmission unit main body 103a as it goes toward the -Y side.

[0121] like Figure 5 As shown, the transmission mechanism 100 has a fixing pin 107 fixed so as not to move relative to the slide base 4. The fixing pin 107 extends in the Z direction. The +Y side of the support plate 110 extending in the Y direction is connected to the slide base 4. The lower part of the fixing pin 107 is connected to the -Y side of the support plate 110. Figure 7 As shown, the upper portion of the fixing pin 107 is engaged with the opening 103 c of the transmission member 103 .

[0122] like Figure 6 As shown, the transmission member 103 is connected to the internal thread member 101 by means of a bearing 108 so as to be relatively rotatable relative to the internal thread member 101. The bearing 108 is provided between the outer periphery of the internal thread member 101 and the inner periphery of the transmission part body 103a. The internal thread member 101 has a pressing portion 101b that presses the bearing 108 when advancing in the axial direction of the output shaft 30.

[0123] “Advancing in the axial direction of the output shaft 30 ” means that the internal thread member 101 moves toward the drive pulley 33 (moves toward the +Y side in the present embodiment) in the axial direction of the output shaft 30 .

[0124] The pressing portion 101b protrudes radially outward (outward in a direction perpendicular to the axial direction) from the -Y end of the internal thread member 101. The pressing portion 101b has an outer diameter that is the same as that of the flange 104b of the sleeve 104. Figure 6 In this state, the -Y side surface of the pressing portion 101b contacts the +Y side surface of the flange 104b.

[0125] Both ends of the rod 62 in the front-rear direction are connected to the transmission shaft 106 of the transmission member 103 and the arm shaft 65 of the arm 61 (see Figure 2 ). The rod 62 extends linearly in a manner of being mounted between the transmission shaft 106 and the arm shaft 65. The -X end of the rod 62 is configured to be rotatable with the transmission shaft 106 as the rotation center. The +X end of the rod 62 is configured to be rotatable with the arm shaft 65 as the rotation center. For example, an adjustment member that can adjust the interval between the transmission shaft 106 and the arm shaft 65 may also be provided on the rod 62.

[0126] The rod 62 preferably has rigidity sufficient to transmit the rotational force of one of the transmission member 103 and the arm 61 to the other. For example, a metal shaft member can be cited as the rod 62. For example, the rod 62 is preferably a member that can be regarded as an ideal rigid body.

[0127] Furthermore, the rod 62 may not be a member that does not deform regardless of the force applied, but may be a member that slightly deforms when a force equal to or greater than a certain value is applied.

[0128] Figure 8 It is a perspective view including a cross section of the rod 62 according to the first embodiment.

[0129] like Figure 8 As shown, the rod 62 has an arm shaft 65 and the latch 9 (see Figure 2 ) connected to the cylinder 120 and the transmission member 103 (refer to Figure 6 ) is connected to a piston 121. The piston 121 is connected to a spring pin 122 (an example of an elastic member) that applies elastic force to the piston 121. In the cylinder 120, a cover member 123 is installed at a portion where the piston 121 enters.

[0130] Cylinder 120 is formed in a cylindrical shape along the longitudinal direction of rod 62. Cover member 123 has a convex portion 123a (hereinafter also referred to as "cylinder-side convex portion 123a") protruding radially inward (inward in a direction perpendicular to the longitudinal direction of rod 62) along the inner circumference of cylinder 120.

[0131] The piston 121 extends along the longitudinal direction of the rod 62. The piston 121 has a convex portion 121a (hereinafter also referred to as "piston side convex portion 121a") protruding from the outer circumference of the top end portion of the piston 121 (the portion closest to the bottom 120a of the cylinder 120) to the radial outside (outside in a direction orthogonal to the longitudinal direction of the rod 62). The piston side convex portion 121a is arranged in the cylinder 120.

[0132] The top end of the piston 121 is connected to the cylinder 120 via a spring pin 122. Figure 8 In the state, the piston-side convex portion 121 a is arranged in a manner with a gap from the bottom portion 120 a of the cylinder 120 and the cylinder-side convex portion 123 a in the longitudinal direction of the rod 62 .

[0133] Fig. 9 This is a perspective view for explaining the operation of the transmission mechanism according to the first embodiment. Fig.10 FIG. 2 is another perspective view for explaining the operation of the transmission mechanism of the first embodiment. Fig. 9 and Fig.10 , it indicates the state where the door 2 is locked at the fully closed position.

[0134] like Fig. 9 As shown, at the fully closed position of the door 2, the push portion 101b of the internal thread member 101 contacts the flange 104b of the sleeve 104. At the fully closed position of the door 2, when the output shaft 30 rotates, the internal thread member 101 rotates with the sleeve 104. The internal thread member 101 receives the rotational force output by the output shaft 30 and moves toward the +Y side while meshing with the external thread member 102 (an example of forward movement).

[0135] Furthermore, when the internal thread 101 moves to the +Y side, the door 2 is in a locked state, and therefore, the external thread 102 and the driving pulley 33 do not rotate.

[0136] In this embodiment, the internal thread 101 moves toward the +Y side and presses the transmission member 103, and the transmission member 103 rotates relative to the internal thread 101. Thus, the force of the internal thread 101 moving toward the +Y side is converted into a force in the rotation direction around the output shaft 30.

[0137] Specifically, when the internal thread member 101 moves toward the +Y side, the transmission member 103 moves toward the +Y side by means of the bearing 108. Fig.10 As shown, the transmission member 103 has an opening 103c extending obliquely with respect to the axial direction of the output shaft 30, and the fixing pin 107 is fitted into the opening 103c. Therefore, the transmission member 103 rotates by a predetermined angle by the movement of the internal thread 101 to the +Y side.

[0138] The "predetermined angle" is an angle determined by the degree of inclination of the opening 103c of the transmission member 103 relative to the axial direction of the output shaft 30. For example, the predetermined angle is set so that the latch 9 (see Figure 2 )The degree of unlocking. Fig.10 In the example of Fig. 9 ) to the +Y side, the transmission member 103 moves clockwise (along Fig.10 The device rotates in the direction of arrow R1.

[0139] The transmission member 103 receives the rotational force of the output shaft 30 when the door 2 is in the fully closed position, and when the internal thread member 101 and the external thread member 102 move while meshing with each other, the force of moving the internal thread member 101 toward the +Y side (an example of a forward force) is transmitted to the rod 62, thereby activating the latch 9.

[0140] In this embodiment, if Figure 8 As shown, the piston 121 moves against the elastic force of the spring pin 122 and comes into contact with the cylinder 120 , and the cylinder 120 and the piston 121 move integrally by a predetermined distance or more, thereby releasing the lock of the door 2 .

[0141] Specifically, if Fig.10 As shown, when the transmission member 103 rotates in the direction of arrow R1, the rod 62 is pulled in the direction of arrow M1 via the transmission arm 103b and the transmission shaft 106.

[0142] In this embodiment, if Figure 8 As shown, the rod 62 has a latch 9 (see Figure 2 ) connected to the cylinder 120 and the transmission member 103 (refer to Fig.10 ) is connected to the piston 121. In addition, the piston 121 is connected to the spring pin 122.

[0143] Therefore, when the rod 62 is moved Fig.10 When the piston 121 is pulled in the direction of the arrow M1, it overcomes the elastic force of the spring pin 122 and moves to Figure 8 When the piston 121 overcomes the elastic force of the spring pin 122 and moves to abut against the cylinder 120 with the help of the cover member 123, the cylinder 120 and the piston 121 move together. Figure 8 When the cylinder 120 and the piston 121 move integrally, as described above, the arm 61 (refer to Figure 4 ) is pulled, the latch 9 is unlocked, thereby releasing the lock of the door 2.

[0144] In addition, if Figure 8As shown in FIG. 1 , the piston side protrusion 121a is arranged with a gap between it and the cylinder side protrusion 123a in the longitudinal direction of the rod 62. Therefore, the gap becomes the gap between the cylinder 120 and the piston side protrusion 121a. Figure 8 Therefore, it is possible to prevent the door 2 from being accidentally unlocked.

[0145] Moreover, in the longitudinal direction of the rod 62, the piston side protrusion 121a is arranged to be spaced apart from the bottom 120a of the cylinder 120. Therefore, when the door 2 is unlocked by using an emergency unlocking device (not shown), the piston 121 does not move, and the cylinder 120 moves to the left. Figure 8 The cylinder 120 moves in the direction of the arrow M2. Figure 8 The door is moved in the direction of arrow M2, whereby the latch 9 is unlocked and the door is released.

[0146] In addition, the interval between the piston side protrusion 121a in the longitudinal direction of the rod 62 and the bottom 120a of the cylinder 120 is larger than the amount corresponding to the unlocking of the door 2. Therefore, even if the cylinder 120 moves an amount corresponding to the unlocking of the door 2, the movement is not hindered by the piston 121.

[0147] like Fig. 9 As shown, after the door 2 is unlocked by the latch 9 , the transmission mechanism 100 transmits the rotation of the output shaft 30 to the drive shaft 33 a via the internal thread 101 and the external thread 102 , thereby opening the door 2 .

[0148] In this embodiment, after the door 2 is unlocked, when the internal thread 101 abuts against the drive pulley 33 and cannot move forward, the rotation of the output shaft 30 is transmitted to the drive shaft 33a via the internal thread 101 and the external thread 102. Thus, the rotation of the drive shaft 33a is transmitted to the belt 32, so that the door 2 is opened.

[0149] As described above, when the door 2 is unlocked, the external thread 102 and the drive pulley 33 become rotatable. The internal thread 101 receives the rotational force output by the output shaft 30, and moves toward the +Y side while meshing with the external thread 102, thereby contacting the drive pulley 33 ( Fig. 9 The internal threaded member 101 indicated by the double-dotted line is located in the state). If the internal threaded member 101 contacts the driving pulley 33, it cannot move to the +Y side. Therefore, the rotational force output by the output shaft 30 is transmitted to the driving shaft 33a by means of the internal threaded member 101 and the external threaded member 102. Then, the rotation of the driving shaft 33a is transmitted to the belt 32, so that the door 2 is opened.

[0150] Next, the movement of the door 2 in closing operation from the state where the door 2 is unlocked at the fully opened position of the door 2 will be described. The movement of the door 2 in closing operation is the opposite movement to the movement of the door 2 in opening operation described above.

[0151] In the present embodiment, the rotation direction of the output shaft 30 is the rotation in the opposite direction to the opening action of the door 2, and the internal threaded member 101 moves in the direction opposite to the forward movement direction and abuts against the reducer 31. Thus, the rotation of the output shaft 30 in the opposite direction is transmitted to the drive shaft 33a by means of the internal threaded member 101 and the external threaded member 102. Thus, the rotation of the drive shaft 33a in the opposite direction to the opening action of the door 2 is transmitted to the belt 32, so that the door 2 performs a closing action.

[0152] Specifically, if Fig. 9 As shown, at the fully open position of the door 2, the +Y end of the internal thread member 101 contacts the drive pulley 33 ( Fig. 9 The state where the internal thread member 101 is located is indicated by a double-dashed line). When the output shaft 30 rotates in the direction opposite to the opening action of the door 2 at the fully open position of the door 2, the internal thread member 101 rotates with the help of the sleeve 104. The internal thread member 101 receives the rotational force output by the output shaft 30 and moves to the -Y side (an example of the direction opposite to the forward movement) while meshing with the external thread member 102.

[0153] When the internal thread 101 receives the rotational force output by the output shaft 30 and moves toward the -Y side while meshing with the external thread 102, the internal thread 101 abuts against the reducer 31 via the sleeve 104. If the internal thread 101 abuts against the reducer 31, it cannot move toward the -Y side ( Fig. 9 The internal threaded member 101 indicated by the solid line is located in the state). Therefore, the rotational force output by the output shaft 30 is transmitted to the drive shaft 33a via the internal threaded member 101 and the external threaded member 102. Then, the rotation of the drive shaft 33a in the opposite direction to the opening action of the door 2 is transmitted to the belt 32, so that the door 2 performs a closing action.

[0154] As described above, the door opening and closing device 1 of the present embodiment comprises: a reducer 31 having an output shaft 30 for outputting a rotational force transmitted from a driving source 6; a drive pulley 33 having a drive shaft 33a (rotational shaft) for receiving the rotational force of the output shaft 30 to open and close the door 2; a rod 62 connected to a latch 9 for releasing the lock of the door 2; and a transmission mechanism 100 that can transmit the output of the output shaft 30 to the rod 62 and the drive pulley 33.

[0155] The transmission mechanism 100 includes: an internal threaded member 101 (a threaded member), which is connected to the output shaft 30 in a manner that can rotate around the output shaft 30 and can move in the axial direction along the output shaft 30; an external threaded member 102 (another threaded member), which is connected to the drive shaft 33a in a manner that can rotate around the drive shaft 33a; and a transmission member 103, which receives the rotational force output by the output shaft 30 at the fully closed position of the door 2 and transmits the forward force of the internal threaded member 101 to the rod 62 when the internal threaded member 101 and the external threaded member 102 are engaged with each other and move, thereby operating the latch 9.

[0156] After the door 2 is unlocked by the latch 9, the transmission mechanism 100 transmits the rotation of the output shaft 30 to the drive shaft 33a by means of the internal thread 101 and the external thread 102, thereby opening the door 2. The transmission member 103 converts the force of the internal thread 101 when it moves in the axial direction into a force in the rotation direction centered on the output shaft 30 and transmits it to the rod 62.

[0157] The transmission mechanism 100 includes a fixing pin 107 that is fixed so as not to move.

[0158] The transmission member 103 is connected to the internal thread 101 so as to be rotatable relative to the internal thread 101 about the output shaft 30 .

[0159] The transmission member 103 has an opening 103 c extending obliquely with respect to the axial direction.

[0160] The fixing pin 107 is fitted into the opening 103c.

[0161] The internal thread 101 moves forward in the axial direction to press the transmission member 103 , and the transmission member 103 rotates relative to the internal thread 101 , thereby converting the force of the internal thread 101 moving in the axial direction into a force in the rotation direction around the output shaft 30 .

[0162] The transmission member 103 is connected to the internal thread member 101 via a bearing 108 so as to be relatively rotatable with respect to the internal thread member 101 .

[0163] The internal thread member 101 includes a pressing portion 101 b that presses the bearing 108 when moving forward in the axial direction.

[0164] The rotating shaft 33 a is a driving shaft 33 a of a driving pulley 33 for driving a belt 32 for opening and closing the door 2 .

[0165] After the door 2 is unlocked, when the internal thread 101 contacts the drive pulley 33 and cannot move forward, the rotation of the output shaft 30 is transmitted to the drive shaft 33a via the internal thread 101 and the external thread 102. Thus, the rotation of the drive shaft 33a is transmitted to the belt 32, so that the door 2 opens.

[0166] The rod 62 includes a cylinder 120 connected to the latch 9 and a piston 121 connected to the transmission member 103 .

[0167] The piston 121 is connected to a spring pin 122 that applies elastic force to the piston 121. The piston 121 moves against the elastic force and abuts against the cylinder 120, and the cylinder 120 and the piston 121 move integrally by a predetermined distance or more, thereby unlocking the door 2.

[0168] The output shaft 30 rotates in the opposite direction to the opening of the door 2, and the internal thread 101 moves in the opposite direction to the forward movement and contacts the reducer 31, so that the reverse rotation of the output shaft 30 is transmitted to the drive shaft 33a via the internal thread 101 and the external thread 102. Thus, the rotation of the drive shaft 33a in the opposite direction to the opening of the door 2 is transmitted to the belt 32, so that the door 2 performs a closing action.

[0169] The drive shaft 33a rotates on the same axis as the output shaft 30. One threaded member is an internal threaded member 101 that rotates on the same axis as the output shaft 30. The other threaded member is an external threaded member 102 that rotates on the same axis as the output shaft 30.

[0170] According to this structure, the forward force of the internal thread 101 is transmitted to the latch 9 by means of the transmission member 103 and the rod 62. Thus, the door 2 is unlocked, and after the door 2 is unlocked by the latch 9, the rotation of the output shaft 30 is transmitted to the drive shaft 33a by means of the internal thread 101 and the external thread 102, so that the door 2 can be opened. Therefore, there is no need to conduct any research on the drive source 6. Therefore, the freedom of selection and configuration of the drive source 6 can be improved.

[0171] In addition, the transmission member 103 converts the force of the internal thread member 101 when it moves in the axial direction into a force in the rotation direction centered on the output shaft 30, and transmits it to the rod 62. As a result, compared with the case where the force of the internal thread member 101 when it moves in the axial direction is only transmitted to the rod 62, the configuration freedom of each component can be improved.

[0172] In addition, the transmission mechanism 100 is provided with a fixing pin 107 which is fixed so as not to move. The transmission member 103 is connected to the internal thread member 101 in a manner that it can rotate relative to the internal thread member 101 with the output shaft 30 as the center. The transmission member 103 has an opening 103c extending obliquely with respect to the axial direction. The fixing pin 107 is engaged with the opening 103c. The internal thread member 101 advances in the axial direction and pushes the transmission member 103, and the transmission member 103 rotates relative to the internal thread member 101. Thus, the force of the internal thread member 101 when it moves in the axial direction is converted into a force in the rotation direction with the output shaft 30 as the center.

[0173] For example, if a power conversion mechanism having a plurality of gear trains is provided to convert the force moving in the axial direction along the output shaft 30 into a force in the rotational direction, the structure may become complicated due to the increase in the number of components. In contrast, according to the present structure, the transmission mechanism 100 can be realized with a simple structure including the fixing pin 107 and the transmission member 103 having the opening 103c.

[0174] The transmission member 103 is connected to the internal thread 101 via a bearing 108 so as to be relatively rotatable with respect to the internal thread 101. The internal thread 101 includes a pressing portion 101b that presses the bearing 108 when the internal thread 101 moves forward in the axial direction.

[0175] For example, if the internal threaded member 101 and the transmission member 103 are in direct contact with each other, the rotation of the transmission member 103 may be relatively slow due to the increase in friction between the internal threaded member 101 and the transmission member 103. In contrast, according to this structure, when the internal threaded member 101 moves forward in the axial direction, the pressing portion 101b presses the bearing 108, thereby enabling the rotation of the transmission member 103 to be relatively smooth.

[0176] In addition, the rotating shaft 33a is a driving shaft 33a of the driving pulley 33 for driving the belt 32 for opening and closing the door 2. After the door 2 is unlocked, when the internal thread 101 abuts against the driving pulley 33 and cannot move forward, the rotation of the output shaft 30 is transmitted to the driving shaft 33a by means of the internal thread 101 and the external thread 102. Thus, the rotation of the driving shaft 33a is transmitted to the belt 32, so that the door 2 is opened.

[0177] According to this configuration, in the belt drive type, compared with the case where a power conversion mechanism having a plurality of gear trains is provided, the opening operation of the door 2 can be realized with a simple configuration.

[0178] In addition, the rod 62 includes a cylinder 120 connected to the latch 9 and a piston 121 connected to the transmission member 103. The piston 121 is connected to a spring pin 122 that applies an elastic force to the piston 121. The piston 121 moves against the elastic force and abuts against the cylinder 120, and the cylinder 120 and the piston 121 move integrally by a predetermined distance or more, thereby releasing the lock of the door 2.

[0179] According to this structure, the cylinder 120 and the piston 121 are moved integrally by a predetermined distance or more against the elastic force of the spring pin 122, thereby unlocking the door 2. For example, the piston 121 can be pulled manually to unlock the door without moving the transmission mechanism 100.

[0180] Furthermore, when the rotation direction of the output shaft 30 becomes a rotation in the opposite direction to the opening action of the door 2, and the internal threaded member 101 moves in the opposite direction to the forward movement direction and abuts against the reducer 31, the reverse rotation of the output shaft 30 is transmitted to the drive shaft 33a via the internal threaded member 101 and the external threaded member 102. Thus, the rotation of the drive shaft 33a in the opposite direction to the opening action of the door 2 is transmitted to the belt 32, so that the door 2 performs a closing action.

[0181] According to this configuration, in the belt drive type, compared with the case where a power conversion mechanism having a plurality of gear trains is provided, the closing operation of the door 2 can be realized with a simple configuration.

[0182] In addition, the drive shaft 33a rotates on the same axis as the output shaft 30. One threaded member is an internal threaded member 101 that rotates on the same axis as the output shaft 30. The other threaded member is an external threaded member 102 that rotates on the same axis as the output shaft 30. According to this structure, compared with the case where one threaded member is an external threaded member and the other threaded member is an internal threaded member, it does not matter if there is less research on the drive shaft 33a (it is sufficient to provide the external threaded member 102 on the drive shaft 33a). Therefore, the transmission mechanism 100 can be realized with a simple structure.

[0183] <Second embodiment>

[0184] Fig.11 It is a perspective view of the periphery including a cross section of the transmission mechanism 200 according to the second embodiment cut along the XY plane. Fig.12 It is a perspective view of the surrounding area including the fixing pin 107 according to the second embodiment.

[0185] In the first embodiment described above, an example is given in which the transmission shaft 106 of the transmission member 103 is connected to the rod 62 (see Fig. 9 ) is described, but is not limited thereto. For example, Fig.11As shown, the transmission shaft 106 of the transmission member 103 may also be connected to the rod 62 via a link mechanism 230. Fig.11 and Fig.12 In the present invention, the same structures as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

[0186] like Fig.11 As shown in FIG. 1 , the transmission mechanism 200 includes a link mechanism 230 that connects the transmission shaft 106 of the transmission member 103 and the rod 62 . The link mechanism 230 includes a link shaft 231 and a link member 232 .

[0187] Both ends of the connecting rod shaft 231 in the front-to-back direction are connected to the transmission shaft 106 of the transmission member 103 and the first connecting rod shaft 233 of the connecting rod member 232. The connecting rod shaft 231 extends linearly in a manner of being bridged between the transmission shaft 106 and the first connecting rod shaft 233. The -X end of the connecting rod shaft 231 is configured to be rotatable with the transmission shaft 106 as the rotation center. The +X end of the connecting rod shaft 231 is configured to be rotatable with the first connecting rod shaft 233 as the rotation center. For example, an adjustment member that can adjust the interval between the transmission shaft 106 and the first connecting rod shaft 233 may also be provided on the connecting rod shaft 231.

[0188] The link member 232 is formed into a V-shape when viewed from the Z direction. The link member 232 can rotate around a fixed shaft 235 extending in the Z direction as a rotation center. The lower portion of the fixed shaft 235 is fixed to a bracket 240 connected to the slide base 4. The link member 232 has a first link shaft 233 and a second link shaft 234, which are arranged in a manner separated from the fixed shaft 235 and extend in the Z direction in parallel with the fixed shaft 235. The first link shaft 233 and the second link shaft 234 are arranged at different positions in the circumferential direction around the fixed shaft 235.

[0189] Both ends of the rod 62 in the front-rear direction are connected to the second link shaft 234 of the link member 232 and the arm shaft 65 of the arm 61. The -X end of the rod 62 is rotatable around the second link shaft 234. The +X end of the rod 62 is rotatable around the arm shaft 65.

[0190] like Fig.12 As shown, the transmission member 103 has an opening 103c extending obliquely with respect to the axial direction of the output shaft 30. The fixing pin 107 is engaged with the opening 103c, so that the transmission member 103 rotates by a predetermined angle by the movement of the internal thread 101 to the +Y side. Fig.12 When the connecting rod shaft 231 rotates in the direction of arrow R1, the connecting rod shaft 231 is rotated in the direction of arrow R1 by the transmission arm 103b and the transmission shaft 106. Fig.12The connecting rod 232 is pulled in the direction of the arrow M21. As a result, the rotational force of the connecting rod 231 is transmitted to the connecting rod member 232 via the first connecting rod 233. Therefore, the connecting rod member 232 rotates along the fixed axis 235 as the center of rotation. Fig.12 Thus, the rod 62 is rotated in the direction of the arrow R21 by the second connecting rod shaft 234. Fig.12 Pull in the direction of arrow M22. Fig.12 When the rod 62 is pulled in the direction of the arrow M22, as described above, the arm 61 is pulled, the latch 9 is unlocked, and the door 2 is unlocked. After the door 2 is unlocked, the door 2 is opened as described above. In addition, the movement of the door 2 when closing is opposite to the movement of the door 2 when opening.

[0191] In addition, the technical scope of the present invention is not limited to the above-mentioned embodiment, and various changes can be added within the scope not departing from the gist of the present invention.

[0192] In the above-mentioned embodiment, an example is given in which the transmission member converts the force of the internal threaded part when it moves in the axial direction into a force in the rotation direction centered on the output shaft and transmits it to the rod, but it is not limited to this. For example, the transmission member can also only transmit the force of the internal threaded part when it moves in the axial direction to the rod. For example, the form of the transmission force of the transmission member can be changed according to the required specifications.

[0193] In the above-mentioned embodiment, the transmission mechanism is provided with a fixing pin which is fixed so as not to move. The transmission member is connected to the internal threaded member in a manner that it can rotate relative to the internal threaded member with the output shaft as the center. The transmission member has an opening extending obliquely with respect to the axial direction. The fixing pin is engaged with the opening. The internal threaded member advances in the axial direction and pushes the transmission member, and the transmission member rotates relative to the internal threaded member, thereby converting the force of the internal threaded member when it moves in the axial direction into a force in the rotation direction with the output shaft as the center.

[0194] In the above-mentioned embodiment, such examples are cited for explanation, but the invention is not limited thereto. For example, the transmission mechanism may not have a fixing pin. For example, the transmission mechanism may have a fixing member, the fixing member has a fixing hole provided at a fixed position, and the transmission member has a convex portion engaged with the fixing hole. For example, a power conversion mechanism having a plurality of gear trains may be provided to convert the force moving in the axial direction along the output shaft into a force in the rotational direction. For example, the structural form of the transmission mechanism may be changed according to the required specifications.

[0195] In the above-described embodiment, an example is given in which the transmission member is connected to the internal thread member via a bearing so as to be relatively rotatable with respect to the internal thread member, and the internal thread member includes a pressing portion that presses the bearing when advancing in the axial direction, but the present invention is not limited thereto.

[0196] For example, the transmission member may be in direct contact with the internal threaded member without the aid of a bearing. For example, the internal threaded member may also have a pressing portion that pushes the transmission member without the aid of a bearing when advancing in the axial direction. For example, the connection form of the transmission member and the internal threaded member can be changed according to the required specifications.

[0197] In the above-mentioned embodiment, the rotating shaft is a driving shaft of a driving pulley that drives a belt for opening and closing the door. After the door is unlocked, when the internal threaded member abuts against the driving pulley and cannot move forward, the rotation of the output shaft is transmitted to the driving shaft by means of the internal threaded member and the external threaded member. Thus, the rotation of the driving shaft is transmitted to the belt, so that the door opens.

[0198] In the above-mentioned embodiment, such an example is cited for explanation, but it is not limited to this. For example, a power conversion mechanism having a plurality of gear trains may be provided, and the rotation of the drive shaft may be transmitted to the belt by means of the gear trains. For example, in the case where the door driving method is not the above-mentioned belt drive type but a screw type (a method in which a motor is used to rotate a screw shaft equivalent to a bolt to open and close a door installed on a ball nut equivalent to a nut), the rotating shaft may also be a screw shaft. For example, in the case where the door driving method is a rack and pinion method (a method in which a motor is used to rotate a gear of a rack and pinion mechanism to open and close a door installed on a rack track), the rotating part having a rotating shaft may also be a gear. For example, the form of the rotating shaft and the rotating part can be changed according to the door driving method and required specifications.

[0199] In the above-mentioned embodiment, the rod (an example of a connecting member) includes a cylinder connected to the unlocking portion and a piston connected to the transmission member. The piston is connected to a spring pin (an example of an elastic member) that applies elastic force to the piston. The piston moves against the elastic force and abuts against the cylinder, and the cylinder and the piston move integrally for a predetermined distance or more, thereby releasing the lock of the door.

[0200] In the above-mentioned embodiment, such examples are cited for explanation, but the invention is not limited thereto. For example, the rod may not have a cylinder and a piston. For example, the connecting member may not be a rod. For example, the connecting member may be a cable, a sprocket, or a shaft. For example, the piston may not be connected to the spring pin. For example, the piston may be connected to other elastic members such as a coil spring, a leaf spring, or a torsion spring. For example, the structural form of the connecting member may be changed according to the required specifications.

[0201] In the above-mentioned embodiment, the rotation direction of the output shaft is the rotation in the opposite direction to the door opening action. When the internal thread member moves in the direction opposite to the forward movement direction and abuts against the reducer, the rotation of the output shaft in the opposite direction is transmitted to the drive shaft by means of the internal thread member and the external thread member. As a result, the rotation of the drive shaft in the opposite direction to the door opening action is transmitted to the belt, so that the door closes.

[0202] In the above embodiment, such an example is cited for explanation, but the present invention is not limited thereto. For example, a power conversion mechanism having a plurality of gear trains may be provided, and the rotation of the drive shaft in the opposite direction to the door opening action may be transmitted to the belt by means of the gear trains. For example, the form of transmitting the rotation of the output shaft to the drive shaft may be changed according to the required specifications.

[0203] In the above-mentioned embodiment, an example in which one threaded member is an internal threaded member and the other threaded member is an external threaded member is given for explanation, but the present invention is not limited thereto. For example, one threaded member may be an external threaded member and the other threaded member may be an internal threaded member. For example, the structural form of the transmission mechanism may be changed according to the required specifications.

[0204] In the above-mentioned embodiment, the drive shaft rotates on the same axis as the output shaft. One threaded member is an internal threaded member that rotates on the same axis as the output shaft. The other threaded member is an external threaded member that rotates on the same axis as the output shaft.

[0205] The above embodiment is described by citing such an example, but is not limited thereto. For example, the drive shaft may rotate on an axis different from that of the output shaft, one threaded member may be an internal threaded member rotating on the same axis as the output shaft, and the other threaded member may be an external threaded member rotating on an axis different from that of the output shaft.

[0206] For example, Fig.13 As shown, the output shaft 330 of the speed reducer 331 and the rotating shaft 333a of the driving pulley 333 may also be arranged on different axes. For example, the rotating shaft 333a may also rotate on an axis parallel to the output shaft 330. For example, the output side teeth 330b arranged on the outer periphery of the output shaft 330 and the rotating side teeth 333b arranged on the outer periphery of the rotating shaft 333a may also be arranged in a mutually meshing manner. For example, the output side teeth 330b may also be arranged at intervals along the output shaft 330 (in Fig.13 For example, the number of rotating side teeth 333b may be plural and spaced apart along the rotating shaft 333a (in the example of FIG. Fig.13 For example, the arrangement of the output shaft and the rotating shaft can be changed according to the required specifications.

[0207] In the above-mentioned embodiment, an example in which the output shaft is the output shaft of a reducer is cited for explanation, but the invention is not limited thereto. For example, the output shaft may also be the output shaft of a motor. That is, the driving member having an output shaft is not limited to a reducer, but may also be a motor. For example, the form of the driving member having an output shaft may be changed according to the required specifications. For example, the unlocking portion is not limited to a latch, but may also be other mechanisms or components for unlocking the door.

[0208] For example, the door opening and closing device may include: a driving member having an output shaft that outputs a rotational force transmitted from a driving source; a rotating member having a rotating shaft that receives the rotational force of the output shaft to open and close the door; a connecting member connected to an unlocking portion for releasing the lock of the door; and a transmission mechanism that can transmit the output of the output shaft to the connecting member and the rotating member. Alternatively, the transmission mechanism may include: one threaded member in the external threaded member or the internal threaded member that is connected to the output shaft in a manner that can rotate around the output shaft and can move along the axial direction of the output shaft; the other threaded member in the internal threaded member or the external threaded member that is connected to the rotating shaft in a manner that can rotate around the rotating shaft; and a transmission member that transmits the forward force of one threaded member when one threaded member and the other threaded member move while meshing with each other when receiving the rotational force output by the output shaft at the fully closed position of the door to the connecting member, thereby operating the unlocking portion. The transmission mechanism may be configured such that after the door is unlocked by the unlocking portion, the rotation of the output shaft is transmitted to the rotating shaft via the one screw member and the other screw member, thereby opening the door.

[0209] According to this structure, the forward force of one screw member is transmitted to the unlocking part by means of the transmission member and the connecting member, thereby releasing the door lock. After the door lock is released by the unlocking part, the rotation of the output shaft is transmitted to the rotating shaft by means of one screw member and another screw member. Thus, the door can be opened, and therefore, no research on the drive source is required. Therefore, the freedom of selection and configuration of the drive source can be improved.

[0210] In the above-mentioned embodiment, the example in which the internal thread member on the speed reducer side can move forward is given for description, but the invention is not limited thereto. For example, the internal thread member on the driving pulley side may also move forward.

[0211] For example, a door opening and closing device includes: a driving member having an output shaft that outputs a rotational force transmitted from a driving source; a rotating member having a rotating shaft that receives the rotational force of the output shaft to open and close the door; a connecting member connected to an unlocking portion for releasing the lock of the door; and a transmission mechanism that can transmit the output of the output shaft to the connecting member and the rotating member. The transmission mechanism includes: one threaded member in the external threaded member or the internal threaded member connected to the output shaft in a manner that can rotate around the output shaft; the other threaded member in the internal threaded member or the external threaded member connected to the rotating shaft in a manner that can rotate around the rotating shaft and can move in the axial direction of the rotating shaft; and a transmission member that receives the rotational force output by the output shaft at the fully closed position of the door and causes one threaded member to move while meshing with the other threaded member, and transmits the forward force of the other threaded member to the connecting member, thereby operating the unlocking portion. The transmission mechanism may be configured such that after the door is unlocked by the unlocking portion, the rotation of the output shaft is transmitted to the rotating shaft via the one screw member and the other screw member, thereby opening the door.

[0212] According to this structure, the forward force of the other screw member is transmitted to the unlocking part by means of the transmission member and the connecting member, thereby releasing the door lock. After the door lock is released by the unlocking part, the rotation of the output shaft is transmitted to the rotating shaft by means of the one screw member and the other screw member. Thus, the door can be opened, and therefore, no research on the drive source is required. Therefore, the freedom of selection and configuration of the drive source can be improved.

[0213] In the above-mentioned embodiment, the example in which the door opening and closing device has a pair of double-pull doors for opening and closing the boarding and alighting door of a railway vehicle is cited for explanation, but the invention is not limited thereto. For example, the door opening and closing device may also be provided in a vehicle other than a railway vehicle. For example, the door opening and closing device may also have a single-pull door.

[0214] Furthermore, the components in the above-described embodiments may be replaced with well-known components without departing from the spirit of the present invention. In addition, the above-described modifications may be combined.

[0215] In the embodiments disclosed in this specification, for a component composed of multiple objects, the multiple objects can also be integrated, and conversely, a component composed of one object can be divided into multiple objects. Regardless of whether it is integrated or not, it can be constructed in a manner that can achieve the purpose of the invention.

Claims

1. A door opening and closing device, in, The door opening and closing device has: A driving member having an output shaft for outputting a rotational force transmitted from a driving source; A rotating member having a rotating shaft for receiving the rotating force of the output shaft to open and close the door; a connecting member connected to an unlocking portion for releasing the lock of the door; and a transmission mechanism capable of transmitting the output of the output shaft to the connecting member and the rotating member, The transmission mechanism comprises: A threaded member of the external threaded member and the internal threaded member, which is connected to the output shaft in a manner that is rotatable about the output shaft and movable in the axial direction of the output shaft; The other threaded member of the internal threaded member and the external threaded member is connected to the rotating shaft in a manner rotatable around the rotating shaft; and a transmission member that receives the rotational force output by the output shaft at the fully closed position of the door and transmits the forward force of the one threaded member when the one threaded member and the other threaded member move while meshing with each other to the connecting member, thereby operating the unlocking portion; The transmission mechanism transmits the rotation of the output shaft to the rotating shaft via the one screw member and the other screw member after the door is unlocked by the unlocking portion, thereby opening the door.

2. The door opening and closing device according to claim 1, in, The transmission member converts the force of the one screw member when it moves in the axial direction into a force in a rotation direction around the output shaft, and transmits the force to the connecting member.

3. The door opening and closing device according to claim 2, in, The transmission mechanism further includes a fixing pin that is fixed so as to be unable to move. The transmission member is connected to the one screw member in a manner that it can rotate relative to the one screw member about the output shaft. The transmission member has an opening extending obliquely with respect to the axial direction, The fixing pin is engaged with the opening, The one screw member advances in the axial direction to press the transmission member, and the transmission member rotates relative to the one screw member, thereby converting the force of the one screw member moving in the axial direction into a force in a rotation direction centered on the output shaft.

4. The door opening and closing device according to any one of claims 1 to 3, in, The transmission member is connected to the one threaded member via a bearing so as to be rotatable relative to the one threaded member. The one screw member includes a pressing portion that presses the bearing when advancing in the axial direction.

5. The door opening and closing device according to any one of claims 1 to 3, in, The rotating shaft is a driving shaft of a driving pulley for driving a belt for opening and closing the door. After the door is unlocked, when the one threaded member abuts against the drive pulley and cannot move forward, the rotation of the output shaft is transmitted to the drive shaft via the one threaded member and the other threaded member, and the rotation of the drive shaft is transmitted to the belt, thereby opening the door.

6. The door opening and closing device according to any one of claims 1 to 3, in, The connecting member comprises: a cylinder connected to the unlocking portion; and a piston connected to the transmission member, The piston is connected to an elastic member that applies elastic force to the piston. The piston moves against the elastic force and comes into contact with the cylinder, and the cylinder and the piston move integrally by a predetermined distance or more, thereby releasing the lock of the door.

7. The door opening and closing device according to any one of claims 1 to 3, in, The rotating shaft is a driving shaft of a driving pulley for driving a belt for opening and closing the door. When the rotation direction of the output shaft becomes a rotation in the opposite direction to the opening action of the door, when the one threaded component moves in the direction opposite to the forward movement direction and abuts against the driving member, the rotation of the output shaft in the opposite direction is transmitted to the driving shaft with the aid of the one threaded component and the other threaded component, so that the rotation of the driving shaft in the opposite direction to the opening action of the door is transmitted to the belt, thereby causing the door to close.

8. The door opening and closing device according to any one of claims 1 to 3, in, The rotating shaft rotates on the same axis as the output shaft, The one threaded member is the internal threaded member that rotates on the same axis as the output shaft, The other threaded member is the external threaded member that rotates on the same axis as the output shaft.

9. A door opening and closing device, in, The door opening and closing device has: A driving member having an output shaft for outputting a rotational force transmitted from a driving source; A rotating member having a rotating shaft for receiving the rotating force of the output shaft to open and close the door; a connecting member connected to an unlocking portion for releasing the lock of the door; and a transmission mechanism capable of transmitting the output of the output shaft to the connecting member and the rotating member, The transmission mechanism comprises: A threaded member of the external threaded member and the internal threaded member, which is connected to the output shaft in a manner that can rotate around the output shaft; The other of the internally threaded member and the externally threaded member is connected to the rotating shaft so as to be rotatable about the rotating shaft and movable in the axial direction along the rotating shaft; and a transmission member that receives the rotational force output by the output shaft at the fully closed position of the door and transmits the advancing force of the other threaded member to the connecting member when the one threaded member and the other threaded member move while meshing with each other, thereby operating the unlocking portion; The transmission mechanism transmits the rotation of the output shaft to the rotating shaft via the one screw member and the other screw member after the door is unlocked by the unlocking portion, thereby opening the door.

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