JP2009079424A - Door buffer and door structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door buffer 18 and a door structure, which do not cause an increase in labor for installation and a deterioration in appearance, which can prevent the automatic closing of a door, and which enable the easy and sure closing of the door. <P>SOLUTION: The door structure comprises an opening frame, the door and the buffer; and the buffer is equipped with a buffer body 34 which is attached to an opening, and a joint member which is attached to the door. The buffer body 34 comprises a movable portion 40 which is constituted in such a manner as to be movable in a door opening/closing direction, a joint 42 which is provided in the movable portion 40 and separably joined to the joint member immediately before the closing of the door, a holding mechanism 44 which holds the movable portion 40 in a prescribed standby position and which releases the held state of the movable portion 40 when the joint member is joined to the joint 42, and a pull-in means 46 for pulling in the movable portion 40 while controlling a speed, until the door is closed, when the holding mechanism 44 releases the held state of the movable portion 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door shock absorber that reduces the impact applied to the door and the opening by attenuating the momentum of the door when closing the door provided in the opening of the building, and a door structure including the door shock absorber. About.

  In buildings such as condominiums and detached houses, doors such as entrance doors, toilets, rooms, etc., that is, opening doors or sliding doors, are provided at the entrances or openings. In addition, the opening may be damaged or excessive sound may be generated. Moreover, when a hand is put on the opening frame, there is a possibility that a finger is pinched between the opening frame and the door.

Thus, various shock absorbers that reduce the impact applied to the door and the opening have been developed in the past. As an example, a “door closer” often used in hinged doors or a “buffer device” disclosed in Patent Document 1 is used. In addition, a “closure device” disclosed in Patent Document 2 is known.
JP-A-4-258484 JP-A-9-256729

  The conventional “door closer” applies a force in the normally closing direction to the door, forcibly closing the door while attenuating the momentum of the door, and the “buffer” counteracts the force to close the door. By applying a force to the door, the momentum of the door is attenuated. The “closing device” applies a closing force to the door immediately before the door is completely closed to forcibly close the door while attenuating the momentum of the door. Therefore, any of these can solve the above-described problems caused by the impact.

  However, since the “door closer” does not have a function of holding the door in an open state, there is a problem in that the door is closed without permission to obstruct traffic. Moreover, since it is the structure which connects a door and an opening frame, there existed a problem that the positioning operation | work and attachment operation | work of a door closer were difficult, and the removal operation | work of the door at the time of a maintenance was difficult. On the other hand, the shock absorber does not have a function to forcibly close the door, so people have to apply force to completely close the door, and people with weak power such as children and the elderly Had the problem of a heavy burden. And in the “closure device”, magnetic force is used as “force to close the door”, so that the force cannot be applied to the door until just before the door is completely closed. There was a problem.

  As a means for solving such a problem, it is conceivable to use “door closer”, “buffer device”, and “closing device” in an appropriate combination, but in that case, installation takes time and appearance. There was a risk of another problem of being bad.

  Therefore, the main problem of the present invention is to provide a door cushioning device that can prevent the door from being closed without causing an increase in installation time and deterioration in appearance, and can close the door easily and reliably. It is to provide a door structure.

  According to the first aspect of the present invention, “the impact applied to the doors 16 and 182 and the opening 12 by attenuating the momentum of the doors 16 and 182 when closing the doors 16 and 182 provided in the opening 12. A shock absorber 18 of the door for relaxing the shock absorber body 34, 136, 138, 140, 158 attached to either the door 16, 182 or the opening 12, and the door 16, 182 or And the shock absorber main body 34, 136, 138, 140, 158 is configured to be movable in the opening / closing direction of the doors 16, 182. A moving part 40, a connecting part 42 provided in the moving part 40 and detachably joined to the joining member 36 immediately before the doors 16 and 182 are closed, A holding mechanism 44 that holds the moving unit 40 at a predetermined standby position and releases the holding state of the moving unit 40 when the bonding member 36 is bonded to the bonding unit 42, and the holding mechanism 44 includes the When the holding state of the moving part 40 is released, the door shock absorber 18 "has retracting means 46, 162 that pulls in while controlling the speed of the moving part 40 until the doors 16, 182 are closed.

  In the present invention, when the doors 16 and 182 are closed, the joint portions 42 of the shock absorber main bodies 34, 136, 138, 140 and 158 are detachably joined to the joining member 36 immediately before the doors 16 and 182 are closed. Then, the holding state of the moving unit 40 by the holding mechanism 44 is released, and the moving unit 40 is pulled in while the speed is controlled by the pull-in means 46 and 162, and the doors 16 and 182 are completely closed. When the doors 16 and 182 are opened, the moving part 40 joined to the joining member 36 is moved in the pull-out direction (forward) as the doors 16 and 182 move in the opening direction. When the moving unit 40 is moved to the standby position, the moving unit 40 is held by the holding mechanism 44 and the bonded state between the bonding unit 42 and the bonding member 36 is released.

  The “standby position” means a position where the moving unit 40 waits for the joining member 36.

  According to a second aspect of the present invention, in the “door cushioning device 18” according to the first aspect, “the holding mechanism 44 is provided in the moving portion 40 so as to be movable in the opening / closing direction of the doors 16, 182. When the doors 16 and 182 are opened and the joining portion 42 is detached from the joining member 36, the doors 16 and 182 protrude from the front end surface of the moving portion 40 and are moved back in the closing direction. When the operating member 92 and the operating member 92 are projected forward from the front end surface of the moving unit 40, the retracting means 46 and 162 prevent the moving unit 40 from being retracted and protrude. And locking members 96, 116, and 118 that allow the moving unit 40 to be retracted by the retracting means 46 and 162 when the operating member 92 is pushed back. " And butterflies.

  The holding mechanism 44 in the present invention includes an operation member 92 and lock members 96, 116, and 118. When the doors 16 and 182 are opened, the operation member 92 projects from the front end surface of the moving unit 40, In addition, the lock members 96, 116, and 118 prohibit the retraction of the moving part 40 by the retraction means 46 and 162. In other words, the lock members 96, 116, and 118 are locked in conjunction with the protruding operation of the operation member 92. On the other hand, when the doors 16, 182 are closed, the operation member 92 is pushed back by the doors 16, 182, and the lock members 96, 116, 118 enable the moving unit 40 to be retracted by the retracting means 46, 162. That is, the locked state of the lock members 96, 116, and 118 is released in conjunction with the return operation of the operation member 92.

  The invention described in claim 3 is the “door cushioning device 18” described in claim 1 or 2, wherein “the pulling means 46, 162 applies a force required for pulling to the moving part 40, 134 and 156, and a damper 110 that applies a force required for speed control to the moving unit 40 ".

  In the present invention, the restoring force of the springs 108, 134, 156 constituting the retracting means 46, 162 is applied to the moving part 40, and the doors 16, 182 are completely closed by this restoring force. In the process of completely closing the doors 16 and 182, the momentum of the doors 16 and 182 is attenuated by the damper 110, thereby controlling the speed at which the moving unit 40 is drawn.

  The invention described in claim 4 is the “door cushioning device 18” described in claim 1 or 2, wherein “the pull-in means 46 applies a force required for pull-in to the moving portion 40 or a compression coil spring 108 or compression. The tension coil spring 108 or the compression coil spring 134 is disposed so that the expansion / contraction direction thereof is orthogonal to the movement direction of the moving portion, and the tension coil spring 108 or the compression coil spring 134 is provided. Is applied to the moving part 40 via the direction changing means 144, 146, 148 ".

  In order to expand and contract the tension coil spring 108 or the compression coil spring 134, it is necessary to secure a sufficient expansion / contraction space in the expansion / contraction direction. The expansion / contraction space is moved in the moving direction of the moving unit 40, that is, in the opening / closing direction of the doors 16 and 182. It may be difficult to secure due to the structure of the doors 16, 182 or the opening 12. Therefore, in the present invention, by arranging the tension coil spring 108 or the compression coil spring 134 so that the expansion / contraction direction thereof is orthogonal to the movement direction of the moving unit 40, the expansion / contraction space is set with respect to the moving direction of the moving unit 40. The direction perpendicular to the opening / closing direction of the door 16 can be secured, and the direction of the force of the tension coil spring 108 or the compression coil spring 134 is converted by the direction conversion means 144, 146, 148 to the moving unit 40. It is trying to grant.

  The invention described in claim 5 is the “door cushioning device 18” described in claim 1 or 2, wherein “the retracting means 162 is connected to the moving unit 40, and the link mechanism 160. A torsion coil spring 156 that applies a force required for pulling to the moving part 40 via a link, and a damper 110 that applies a force required for speed control to the moving part 40 via the link mechanism 160. It is characterized by.

  In the present invention, the force of the torsion coil spring 156 and the damper 110 is applied to the moving unit 40 via the link mechanism 160.

  According to the sixth aspect of the present invention, “the opening frame 14 provided in the opening 12, the doors 16 and 182 provided in the opening frame 14, and the doors 16 and 182 when the doors 16 and 182 are closed” The door structure 10 includes a shock absorber 18 that reduces shock applied to the doors 16, 182 and the opening 12 by dampening the momentum, and the shock absorber 18 is the door 16, 182 or the opening 12. A shock absorber main body 34, 136, 138, 140, 158 attached to any one of the above, and a joining member 36 attached to either the door 16, 182 or the opening 12 above, The shock absorber main bodies 34, 136, 138, 140, 158 are provided in the moving unit 40 configured to be movable in the opening / closing direction of the doors 16, 182 and the moving unit 40. Immediately before the doors 16 and 182 are closed, the joining part 42 detachably joined to the joining member 36 and the moving part 40 are held in a predetermined standby position, and the joining part 42 is A holding mechanism 44 that releases the holding state of the moving unit 40 when the bonding member 36 is bonded, and the holding mechanism 44 releases the holding state of the moving unit 40 until the doors 16 and 182 are closed. This is a door structure 10 "having pull-in means 46 that pulls in while the moving unit 40 is controlled in speed.

  The present invention is a door structure 10 using the door shock absorber 18 according to claim 1.

  According to the first to fifth aspects of the present invention, the joining portion 42 of the shock absorber main body 34, 136, 138, 140, 158 is joined to the joining member 36 immediately before the doors 16, 182 are closed, and thereafter, the retracting means. Since the moving part 40 is pulled in with the speed controlled by 46, it is possible to prevent the doors 16 and 182 and the opening 12 from being subjected to an impact.

  In addition, since the doors 16 and 182 are completely closed by the force applied from the retracting means 46, even a weak person such as a child or an elderly person can easily and surely close the doors 16 and 182. And in the state which opened the doors 16 and 182 completely, since the joining state of the junction part 42 and the joining member 36 is cancelled | released, the problem that the doors 16 and 182 close without permission and obstruct traffic can be eliminated. .

  Furthermore, it is only necessary to attach the shock absorber main body 34, 136, 138, 140, 158 to one of the doors 16, 182 or the opening 12, and to attach the joining member 36 to either one of the doors 16, 182. In addition, there is no worry that the appearance will deteriorate, and the door can be easily removed during maintenance.

  According to the second aspect of the invention, the lock members 96, 116, and 118 are locked in conjunction with the pushing operation of the operation member 92, and the lock member 96 is interlocked with the return operation of the operation member 92. 116, 118 are released from the locked state, so that even when an external force in the pulling direction acts on the moving unit 40, the moving unit 40 is not undesirably pulled, and malfunction of the moving unit 40 can be prevented.

  FIG. 1 is a partial sectional plan view showing a door structure 10 to which the present invention is applied, and FIG. 2 is a front view showing the door structure 10. Note that “front-rear direction” and “up-down direction” used in the following description are used for convenience of description, and correspond to “front-rear direction” and “up-down direction” shown in FIGS.

  The door structure 10 (FIGS. 1 and 2) includes an opening frame 14 provided in the opening 12, a door 16 provided in the opening frame 14, and attenuating the momentum of the door 16 when the door 16 is closed. The door 16 and the shock absorber 18 that reduces the impact applied to the opening 12 are configured.

  The opening 12 is a part of a building such as a condominium or a detached house, which serves as an entrance / exit for an entrance, a toilet, a room, etc., and an entrance / exit of a fitting such as storage, and an opening frame 14 is provided on the inner edge of the opening 12. ing.

  As shown in FIG. 2, the opening frame 14 has two vertical frames 20 provided on the left and right side edges of the opening 12 and a horizontal frame 22 provided on the upper edge of the opening 12. A groove 24 (FIG. 1) is formed in the vertical frame 20 and the horizontal frame 22, and a rod-like door stop 26 on which the door 16 hits the groove 24 is attached.

  As shown in FIGS. 1 and 2, the door 16 includes a plate-like door panel 28 that closes the opening 12, and handles 30 attached to both main surfaces of the door panel 28. The opening frame 14 is attached to the vertical frame 20 via a hinge 32 so as to be freely opened and closed. Therefore, when the door 16 is opened, the handle 30 is put on the hand and the door panel 28 is rotated in the opening direction (forward). When the door 16 is closed, the handle 30 is put on the hand and the door 30 is turned on. The panel 28 is rotated in the closing direction (backward).

  As shown in FIGS. 1 and 2, the shock absorber 18 includes a shock absorber main body 34 attached to the opening 12 via the opening frame 14, and a joining member attached to the door 16 so as to face the shock absorber main body 34. 36.

  As shown in FIGS. 3 and 4, the shock absorber main body 34 includes a case 38, a moving part 40, a joint part 42, a holding mechanism 44, a retracting means 46, and lid bodies 48 a and 48 b. Yes.

  As shown in FIG. 5, the case 38 is a box-shaped member having a substantially rectangular shape in plan view formed of synthetic resin, metal, or the like. A groove-shaped damper accommodating space 50 is formed in the longitudinal direction in the center of the case 38. In a portion extending from the longitudinal center of the case 38 to the front end, a moving portion receiving space 52 having a substantially U-shape in plan view is formed so as to surround the front end of the damper receiving space 50. .

  The moving part accommodating space 52 is constituted by two groove-like sliding spaces 52a and 52b extending in parallel with the damper accommodating space 50 on both sides of the damper accommodating space 50, and a connecting space 52c that connects them. The front surface of the part accommodating space 52 is opened at the front end surface 38 c of the case 38. A locking step portion 54 for preventing the moving portion 40 from falling off is formed on the inner side surfaces of the sliding spaces 52a and 52b.

  Further, a groove-like spring accommodating space 56 is formed in parallel to the damper accommodating space 50 in a portion extending from the longitudinal center of the case 38 to the rear end, and the front end of the spring accommodating space 56 is a moving part. An opening is formed so as to communicate with one sliding space 52 a of the accommodation space 52, and a protruding spring locking portion 58 is formed on the inner surface of the rear end portion of the spring accommodation space 56. Furthermore, a plurality of (four in this embodiment) through-holes 60 through which fixing screws (not shown) are inserted are formed on both sides in the width direction of the case 38.

  And other components, such as the moving part 40, the junction part 42, the holding mechanism 44, the drawing-in means 46, and the cover bodies 48a and 48b, are incorporated in this case 38 (FIGS. 3 and 4).

  As shown in FIG. 6, the moving part 40 is a substantially U-shaped member in a plan view formed of synthetic resin or metal, and is slidably disposed in the sliding spaces 52 a and 52 b of the case 38. The sliding part 62a and 62b and the connection part 64 which connects these front-end parts are comprised.

  One sliding portion 62a has a groove-like spring accommodating space 66, and the rear end portion of the spring accommodating space 66 is one sliding space 52a in the moving portion accommodating space 52 (FIG. 5) of the case 38. A protrusion-like spring locking portion 68 is formed on the inner surface of the front end portion of the spring accommodating space 66. The other sliding portion 62 b has a groove-like operation member accommodation space 70, the rear end portion of the operation member accommodation space 70 is closed, and the front end portion is opened at the front end surface of the moving portion 40. Yes. A locking step 71 for preventing the operation member 92 from falling off is formed on the inner side surface of the operation member accommodation space 70.

  The connecting portion 64 is a portion facing the damper accommodating space 50 of the case 38 across a space 72 formed between the sliding portions 62a and 62b. The connecting portion 64 includes a piston 114 that constitutes a damper 110 described later. An accommodating space 74 for accommodating the locking head 114c is formed. A slit 78 that allows the piston rod 114 b to pass through is formed in the wall 76 that partitions the accommodation space 74 and the space 72. Therefore, in a state where the locking head 114c is stored in the accommodation space 74, the locking head 114c is locked to the wall 76 (FIG. 4).

  Further, locking projections 80 that are locked to the locking step portions 54 of the case 38 are formed on both side surfaces in the width direction at the rear end portion of the moving portion 40, that is, on the outer end surfaces of the sliding portions 62a and 62b. A substantially square through hole 82 for forming the holding mechanism 44 is formed in the outer wall 70a that constitutes the operation member accommodating space 70 in the sliding portion 62b. A bearing hole 84 is formed in the rear part of the pair of opposing surfaces. Further, a magnet accommodating space 86 for forming the joint portion 42 is formed at the front end portions of the sliding portion 62 a and the connecting portion 64.

  The joining portion 42 is a portion that is detachably joined to the joining member 36 immediately before the door 16 is closed, and is integrally provided at the front end portion of the moving portion 40. That is, the joining portion 42 has a magnet housing space 86 formed at the front end portion of the sliding portion 62 a and the connecting portion 64, and a substantially rectangular plate-like magnet 90 housed in the magnet housing space 86. The entire front end portion of the sliding portion 62 a and the connecting portion 64 is the joint portion 42.

  In addition, the joining part 42 of a present Example should just be a part joined to the joining member 36 by magnetic force (magnetic attachment), and when the joining member 36 is a "magnet", it replaces with the magnet 90, iron etc. The “ferromagnetic material” may be used. Further, the magnet 90 or the ferromagnetic body constituting the joining portion 42 may be provided exposed on the front end surface of the moving portion 40. Further, in place of the “magnetic type” joining portion 42 as in the present embodiment, a “hook type” or “suction cup type” joining portion that is detachably joined to the joining member 36 immediately before the door 16 is closed. (Not shown) may be used.

  The holding mechanism 44 holds the moving part 40 at a predetermined standby position, and releases the holding state of the moving part 40 when the joining member 36 is joined to the joining part 42, as shown in FIG. Furthermore, the operation member 92 and the compression coil spring 94 housed in the operation member housing space 70 of the moving unit 40, the through hole 82 of the moving unit 40, and the lock member 96 disposed in the through hole 82 are configured. . Here, the “standby position” means a position where the moving part 40 waits for the joining member 36, and means a position where the moving part 40 protrudes from the moving part accommodation space 52 to the maximum in this embodiment.

  The operation member 92 is for operating the lock member 96 and has a rod-like operation portion main body 98 having a substantially square cross section. A substantially square through-hole 100 that can communicate with the through-hole 82 of the moving unit 40 is formed at a predetermined position of the operation unit main body 98. A locking projection 93 that is locked to the locking step 71 of the portion 40 is formed. A cushion material 102 such as rubber or urethane is attached to the front end portion of the operation unit main body 98.

  The compression coil spring 94 imparts a force pushing forward to the operation member 92, and is disposed behind the operation member 92 in the operation member accommodation space 70. The length of the compression coil spring 94 is such that the operation member 92 can be completely accommodated in the operation member accommodation space 70 when compressed, and the operation member 92 is moved forward from the front end surface of the moving unit 40 when restored. The restoring force F1 of the compression coil spring 94 is set to be smaller than the joining force F2 between the joining portion 42 and the joining member 36 (F1 <F2). Therefore, the joining state (joining force F2) between the joining portion 42 and the joining member 36 is not undesirably released by the restoring force F1 of the compression coil spring 94.

  The lock member 96 prohibits the retracting means 46 from retracting the operating portion 92 when the operating member 92 projects forward from the front end surface of the moving portion 40, and the projecting operating member 92 is pushed back. It is a member that sometimes allows the moving part 40 to be retracted by the retracting means 46, and has a triangular prism-shaped lock member main body 104 having a substantially right triangle in plan view, and rotations projecting on both upper and lower surfaces of the right angle portion of the lock member main body 104. And a shaft 106. The rotation shaft 106 of the lock member 96 is rotatably fitted in a bearing hole 84 provided in the through hole 82.

  In the holding mechanism 44, when the operation member 92 protrudes forward from the front end surface of the moving unit 40, the lock member 96 is pushed by the inner surface of the through hole 100 toward the outside as shown in FIG. It is rotated. Then, as shown in FIG. 7D, one acute angle portion 96 a of the lock member 96 protrudes from the opening outside the through hole 82, and the other acute angle portion 96 b is inside the through hole 82. It is arranged close to the side surface of 92. On the other hand, when the protruding operation member 92 is pushed back, as shown in FIG. 8E, the through hole 100 of the operation member 92 and the through hole 82 of the moving portion 40 are communicated with each other, and the lock member 96 is The case 38 is pushed by the front end face 38c and rotated inward. Then, as shown in FIG. 8F, one acute angle portion 96a of the lock member 96 is accommodated in the through hole 82, and the other acute angle portion 96b is inside the through hole 100 from the opening inside the through hole 82. Is projected to. The series of operations of the holding mechanism 44 will be described in detail later.

  When the holding mechanism 44 releases the holding state of the moving part 40, the pulling means 46 pulls in the moving part 40 while controlling the speed until the door 16 is closed. As shown in FIGS. 108 and a damper 110.

  The tension coil spring 108 applies a force required for pulling to the moving part 40, and as shown in FIG. 4, one end of the tension coil spring 108 is a spring lock formed in the spring accommodating space 56 of the case 38. The other end of the tension coil spring 108 is locked to a spring locking portion 68 formed in the spring accommodating space 66 of the moving portion 40. The length of the tension coil spring 108 is set so as to be extended when the moving part 40 is pulled out from the case 38. The restoring force F3 of the tension coil spring 108 is based on the joining force F2 between the joining part 42 and the joining member 36. Is set to be small (F3 <F2). Therefore, the joining state (joining force F2) between the joining portion 42 and the joining member 36 is not undesirably released by the restoring force F3 of the tension coil spring 108.

  The damper 110 applies a force required for speed control (a force that resists the pulling force) to the moving unit 40, and as shown in FIG. 4, a cylindrical cylinder 112 filled with oil therein. And a piston 114 inserted into the cylinder 112 so as to be able to advance and retreat. The piston 114 has a hole through which oil passes, and is provided at a piston head 114a disposed in the cylinder 112, a piston rod 114b whose rear end is connected to the piston head 114a, and a front end of the piston rod 114b. And a locking head 114c. The cylinder 112 is accommodated in the damper accommodating space 50 formed in the case 38, and the locking head 114 c of the piston 114 is accommodated in the accommodating space 74 formed in the moving portion 40 and is locked to the wall 76. Has been.

  As the damper 110, instead of the “oil type damper” of this embodiment, a “friction type damper”, a “rotary damper”, or other types of dampers may be used.

  The joining member 36 (FIGS. 1 and 2) is a plate-like member made of a ferromagnetic material (iron or the like) that can be joined to the magnet 90 of the joining portion 42, and a position facing the shock absorber main body 34 on the surface of the door 16. Are attached by fixing means (not shown) such as screws or adhesives.

  The joining member 36 of the present embodiment may be any member that is joined (magnetically attached) to the joining portion 42 by a magnetic force, and when the joining portion 42 is configured using a ferromagnetic material such as iron. The joining member 36 may be formed of a magnet. Further, instead of the “magnetic type” joining member 36 as in the present embodiment, a “hook type” or “suction cup type” joining member (not shown) that can be detachably joined to the joining portion 42 is used. May be. Furthermore, in order to make the joining member 36 inconspicuous, a decorative sheet having the same pattern as the door panel 28 may be attached to the surface of the joining member 36 or the same color as the door panel 28 may be applied.

  When constructing the door structure 10 (FIGS. 1 and 2), the opening frame 14 is attached to the opening 12 of the building, and then the door is placed on one vertical frame 20 constituting the opening frame 14 via a hinge 32. 16 is attached. And a part of the door stop 26 provided in the upper part of the opening frame 14 (horizontal frame 22) is cut off, and the shock absorber main body 34 is attached to the part using a fixing screw (not shown). Moreover, the joining member 36 is attached to the upper part of the door panel 28 which comprises the door 16 with a screw | thread or an adhesive agent (illustration omitted). Depending on the structure of the opening 12, the opening frame 14 may be unnecessary. In this case, the shock absorber main body 34 is directly attached to the upper part of the opening 12.

  In the door structure 10, when the door 16 is completely closed, as shown in FIG. 7A, the joining member 36 provided on the door 16 is connected to the joining portion 42 (FIG. 4) constituting the shock absorber main body 34. In this state, the moving part 40 is drawn into the moving part accommodating space 52 (FIG. 5) of the case 38 by the drawing means 46. Further, in this state, the through hole 100 of the operation member 92 and the through hole 82 of the moving unit 40 are communicated, and one acute angle portion 96a of the lock member 96 is accommodated in the through hole 82, and the other The acute angle portion 96b protrudes into the through hole 100 from the opening inside the through hole 82.

  When opening the door 16, a hand is put on the handle 30 (FIGS. 1 and 2) to rotate the door 16 in the opening direction. Then, as illustrated in FIG. 7B, the joining member 36 and the moving unit 40 joined thereto are moved in the opening direction (forward) of the door 16 as the door 16 moves. When the moving unit 40 is moved to the standby position, the locking projection 80 is locked to the locking step 54, the moving unit 40 is stopped, and the through hole 82 of the moving unit 40 is formed in the case 38. It arrange | positions ahead of the front-end surface 38c. Accordingly, the lock member 96 can be turned to the outside (the outer surface side of the moving unit 40). That is, the “standby position” where the moving unit 40 is held by the holding mechanism 44 is defined by the locking projection 80 being locked to the locking step portion 54.

  When the door 16 is further rotated in the opening direction, the joining portion 42 is detached from the joining member 36, and as shown in FIG. 7C, the joining member 36 is separated from the front end face of the moving portion 40 that has already been stopped. Thus, the opening of the front end portion in the operation member accommodation space 70 is opened. Then, the operation member 92 is pushed out from the opening by the compression coil spring 94, and accordingly, the lock member 96 is pushed by the inner surface of the through hole 100 and rotated outward (outer surface side of the moving unit 40).

  In the state where the pushing of the operation member 92 by the compression coil spring 94 is completed, as shown in FIG. 7D, one acute angle portion 96a of the lock member 96 protrudes outside from the opening outside the through hole 82, and this acute angle The portion is locked to the front end surface 38 c of the case 38. Further, the other acute angle portion 96 b is disposed in the through hole 82 in the vicinity of the side surface of the operation member 92, and the acute angle portion abuts on the side surface of the operation member 92, thereby rotating the lock member 96 inward. Movement is prohibited. Therefore, even when an external force in the retracting direction is applied to the moving unit 40, the moving unit 40 is not undesirably pulled, and malfunction of the moving unit 40 can be prevented. That is, the holding state of the moving unit 40 by the holding mechanism 44 is maintained.

  On the other hand, when the door 16 is closed, the hand 16 is put on the handle 30 (FIGS. 1 and 2) to rotate the door 16 in the closing direction. Then, as shown in FIG. 8E, the joining member 36 is brought into contact with the front end surface of the operation member 92, and the operation member 92 is biased by the compression coil spring 94 as the door 16 rotates in the closing direction. Pushed back against. When the operation member 92 is completely pushed into the operation member accommodation space 70 of the moving unit 40, the joining member 36 is brought into contact with the front end surface of the moving unit 40 and the joining unit 42 (FIGS. 3 and 4). Is removably joined. In this state, the through hole 100 of the operation member 92 and the through hole 82 of the moving unit 40 are communicated, and the lock member 96 can be turned inward. When the joining member 36 comes into contact with the front end surface of the moving part 40, an impact is applied to the moving part 40. Since the damper 110 of the retracting means 46 is connected to the moving part 40, the moving part 40 is moved by the impact. The part 40 is not pushed in immediately.

  In this embodiment, the joining member 36 is brought into contact with the front end surface of the operation member 92, but the joining member 36 is not opposed to the operation member 92 as in the case where the small joining member 36 is used. Alternatively, the door 16 may come into contact with the front end surface of the operation member 92. That is, the operation member 92 only needs to be configured to be pushed back by the door 16 moved in the closing direction.

  When the lock member 96 can be turned inward, the moving unit 40 is pulled in by the pull-in means 46, and the lock member 96 is pushed by the front end face 38c of the case 38 and rotated inward. Thereby, one acute angle portion 96a of the lock member 96 is accommodated in the through hole 82, and the engagement state of the acute angle portion with respect to the front end surface 38c of the case 38 is completely released. Thereafter, the moving unit 40 is further retracted while the speed is controlled by the retracting means 46, and the door 16 is completely closed as shown in FIG. 8 (F).

  In a state where the door 16 is completely closed, the joining member 36 provided on the door 16 is joined to the joining portion 42 (FIGS. 3 and 4), so that the door 16 does not open undesirably. Therefore, it is not always necessary to provide a “latch mechanism” on the door 16 and the opening frame 14, the configuration of the door structure 10 can be simplified, and the annoying operating noise of the “latch mechanism” can be eliminated.

  In the door structure 10, when the joining member 36 attached to the door 16 hits the moving portion 40, the momentum of the door 16 is attenuated, and thereafter, the door 16 is completely closed while the speed is controlled by the retracting means 46. Therefore, if a gap that allows fingers to enter between the door 16 and the opening frame 14 when the joining member 36 hits the moving portion 40 can be secured, an accident that pinches fingers can be prevented. Therefore, in the present embodiment, by adjusting the mounting position of the shock absorber main body 34 or the protruding length of the moving portion 40, a clearance that allows fingers to enter between the door 16 and the opening frame 14 is secured. Yes.

  In the above-described embodiment, the “triangular prism-like” lock member 96 is used in the holding mechanism 44, but “the shape of the lock member 96” and “the operation mechanism” can be appropriately changed. For example, FIG. 9 and FIG. 10 and the lock member 118 shown in FIGS. 13 and 14 may be used.

  The lock member 116 shown in FIGS. 9 and 10 includes a quadrangular prism-shaped lock member main body 120 having a substantially parallelogram in plan view, and rotating shafts 122 protruding on both upper and lower surfaces of one obtuse angle portion of the lock member main body 120. Have. The bearing hole 124 for supporting the lock member 116 is formed in a groove shape extending in the thickness direction of the outer wall 70a at the rear part of the pair of opposed surfaces opposed to the through hole 82 in the vertical direction. A rotating shaft 122 is fitted so as to be rotatable and slidable.

  In the door structure 10 using the lock member 116, when the door 16 is completely closed, as shown in FIG. 11A, the through hole 100 of the operation member 92 and the through hole 82 of the moving unit 40 are communicated with each other. One acute angle portion 116 a of the lock member 116 is accommodated in the through hole 82, and the other acute angle portion 116 b protrudes into the through hole 100 from the opening inside the through hole 82.

  When the door 16 is rotated in the opening direction when the door 16 is opened, as shown in FIG. 11B, the joining member 36 and the moving portion 40 joined to the door 16 move as the door 16 moves. The moving portion 40 is stopped at the standby position, and the through hole 82 of the moving portion 40 is disposed in front of the front end surface 38 c of the case 38. Thereby, the movement to the outer side (the outer surface side of the moving part 40) of the lock member 116 is attained.

  When the door 16 is further rotated in the opening direction and the joining member 36 is pulled away from the front end face of the moving part 40, that is, when the joining part 42 is detached from the joining member 36, as shown in FIG. Is pushed out by the compression coil spring 94, and the lock member 116 is pushed by the inner surface of the through hole 100 and rotated around the rotation shaft 122, and the outer side of the through hole 82 (the moving part 40) along the bearing hole 124. To the outer surface side).

  In the state where the pushing of the operation member 92 by the compression coil spring 94 is completed, as shown in FIG. 11D, one acute angle portion 116a of the lock member 116 protrudes outside from the opening outside the through hole 82, and this acute angle. The portion is locked to the front end surface 38 c of the case 38. Further, the other acute angle portion 116 b is disposed in the through hole 82 in the vicinity of the side surface of the operation member 92, and the acute angle portion is brought into contact with the side surface of the operation member 92, thereby moving the lock member 116 inward. Is prohibited.

  On the other hand, when the door 16 is turned in the closing direction when the door 16 is closed, the door 16 or the joining member 36 is brought into contact with the front end portion of the operation member 92 as shown in FIG. With this rotation, the operating member 92 is pushed back against the bias of the compression coil spring 94. When the operation member 92 is completely pushed into the operation member accommodation space 70 of the moving unit 40, the bonding member 36 is removably bonded to the front end surface of the moving unit 40 by the bonding unit 42. In this state, the through hole 100 of the operation member 92 and the through hole 82 of the moving unit 40 are communicated, and the lock member 116 can be moved inward.

  When the inward movement of the lock member 116 becomes possible, the moving part 40 is retracted by the retracting means 46, the lock member 116 is pushed and rotated by the front end surface 38 c of the case 38, and the inward of the through hole 82. Moved towards. Thereby, one acute angle portion 116a of the lock member 116 is accommodated in the through hole 82, and the engagement state of the acute angle portion with the front end surface 38c of the case 38 is completely released. Thereafter, the moving unit 40 is further retracted while the speed is controlled by the retracting means 46, and the door 16 is completely closed as shown in FIG.

  The lock member 118 shown in FIGS. 13 and 14 has a shape obtained by cutting a regular octagonal column in half, and a surface corresponding to the cut surface is directed forward in the through hole 82, and the moving portion Two inclined surfaces 126a and 126b that are inclined with respect to the moving direction of 40 are directed rearward.

  The operation member 92 used for operating the lock member 118 is formed with a recess 128 that accommodates a part of the lock member 118, and an inclined surface 130 a is formed on one inclined surface of the lock member 118 at the rear of the recess 128. It is formed in parallel with 126a. The inclined surface 130 a functions as an “extrusion surface” that abuts against one inclined surface 126 a of the lock member 118 and pushes the lock member 118 outward from the opening outside the through hole 82. On the other hand, an inclined surface 130 b is formed at the front end portion of the case 38 in parallel with the other inclined surface 126 b of the lock member 118. The inclined surface 130 b functions as a “pushing surface” that contacts the other inclined surface 126 b of the lock member 118 and pushes the lock member 118 into the through hole 82.

  In the door structure 10 using the lock member 118, when the door 16 is completely closed, as shown in FIG. 15A, the concave portion 128 of the operation member 92 and the through hole 82 of the moving portion 40 are communicated with each other. The lock member 118 is accommodated across both the recess 128 and the through hole 82.

  When the door 16 is rotated in the opening direction when the door 16 is opened, as shown in FIG. 15B, the joining member 36 and the moving portion 40 joined to the door 16 move as the door 16 moves. The moving portion 40 is stopped at the standby position, and the through hole 82 of the moving portion 40 is disposed in front of the inclined surface (pushing surface) 130b formed at the front end portion of the case 38. Is done. Thereby, the movement to the outer side (the outer surface side of the moving part 40) of the lock member 118 is attained.

  When the door 16 is further rotated in the opening direction and the joining member 36 is pulled away from the front end face of the moving part 40, that is, when the joining part 42 is detached from the joining member 36, as shown in FIG. Is pushed out by the compression coil spring 94, and accordingly, the lock member 118 is pushed by the inclined surface (pushing surface) 130 a and moved toward the outside of the through hole 82.

  In the state where the pushing of the operation member 92 by the compression coil spring 94 is completed, as shown in FIG. 15D, a part of the lock member 118 protrudes outside from the opening outside the through hole 82, and this protruding part The inclined surface 126b formed in the rear part is locked to the inclined surface (pushing surface) 130b. Further, the side surface of the lock member 118 on the operation member 92 side is disposed in the through hole 82 in the vicinity of the side surface of the operation member 92, and the side surface of the lock member 118 abuts on the side surface of the operation member 92, thereby Inward movement is prohibited.

  On the other hand, when the door 16 is closed, if the door 16 is rotated in the closing direction, the door 16 or the joining member 36 is brought into contact with the front end portion of the operation member 92 as shown in FIG. With this rotation, the operating member 92 is pushed back against the bias of the compression coil spring 94. When the operation member 92 is completely pushed into the operation member accommodation space 70 of the moving unit 40, the bonding member 36 is removably bonded to the front end surface of the moving unit 40 by the bonding unit 42. In this state, the concave portion 128 of the operation member 92 and the through hole 82 of the moving portion 40 are communicated with each other, so that the lock member 118 can be moved inward.

  When the lock member 118 can move inward, the moving unit 40 is pulled in by the pull-in means 46, and the lock member 118 is pushed by the inclined surface (push surface) 130 b and moved toward the inside of the through hole 82. . Thereby, the lock member 118 is accommodated over both the recessed part 128 and the through-hole 82, and the latching state with respect to the inclined surface (pressing surface) 130b of the inclined surface 126b is completely cancelled | released. Thereafter, the moving unit 40 is further retracted while the speed is controlled by the retracting means 46, and the door 16 is completely closed as shown in FIG.

  The lock member 118 of the present embodiment has a shape obtained by cutting a regular octagonal prism in half, and in the through hole 82, there are two inclined surfaces 126a inclined with respect to the moving direction of the moving portion 40, and Although 126b is directed rearward, at least one of these inclined surfaces 126a or 126b may be changed to an arcuate curved surface 126c as shown in FIG. 17 (A) or (B). A curved surface 126c shown in FIG. 17A is obtained by forming only a portion corresponding to the inclined surface 126a or 126b in an arc shape, and a curved surface 126c shown in FIG. 17B is formed on the inclined surface 126a or 126b. It is formed in an arc shape including not only the corresponding part but also the front corner part.

  Further, in the above-described holding mechanism 44, the operation member 92 is pushed forward by the restoring force of the compression coil spring 94. However, as shown in FIG. 18, the operation member 92 is operated by the repulsive force of the two magnets 132a and 132b having different polarities. The member 92 may be pushed forward, or the operation member 92 may be pushed forward by the elasticity of another elastic material such as rubber.

  Further, in the above-described retracting means 46, the moving part 40 is retracted by the restoring force of the tension coil spring 108. However, as shown in FIG. 18, the moving part 40 is retracted by the restoring force of the compression coil spring 134. Good. Further, in the retracting means 46, the tension coil spring 108 or the compression coil spring 134 may be disposed inside the damper 110 for the purpose of downsizing.

  The tension coil spring 108 or the compression coil spring 134 constituting the retracting means 46 has its expansion / contraction direction in the moving direction of the moving unit 40 as in the shock absorber main body 136, 138, 140 shown in FIG. It may be arranged so as to form a predetermined angle with respect to it.

  A shock absorber main body 136 shown in FIG. 19 has the tension coil spring 108 and the damper 110 of the retracting means 46 arranged so as to extend in a direction orthogonal to the moving direction of the moving part 40, and the auxiliary moving part is disposed on the tension coil spring 108 and the damper 110. 142 is connected, and the auxiliary moving part 142 and the moving part 40 are connected by a bar 144 as “direction changing means”. The bar 144 changes the direction of the force of the tension coil spring 108 and the damper 110 and applies the force to the moving unit 40. One end of the bar 144 is rotatably connected to the auxiliary moving unit 142 via the rotating shaft 144a. The other end of the bar 144 is rotatably connected to the moving unit 40 via the rotating shaft 144b.

  On the other hand, the shock absorber main body 138 shown in FIG. 20 uses a wire 146 instead of the bar 144 as the “direction changing means” of the shock absorber main body 136 (FIG. 19). The other end of the wire 146 is fixed to the moving unit 40. The wire 146 is guided by a guide roller 146a provided in the case 38 so as to move at a substantially right angle.

  Further, as can be seen from FIG. 22, the shock absorber main body 140 shown in FIG. 21 extends the tension coil spring 108 and the damper 110 of the retracting means 46 so as to extend in a direction perpendicular to the moving direction of the moving unit 40, and The auxiliary moving part 142 is connected to the tension coil spring 108 and the damper 110, and the movement of the auxiliary moving part 142 is transmitted to the moving part 40 via a gear mechanism 148 as “direction changing means”. In this shock absorber 140, the tension coil spring 108, the damper 110, and the auxiliary moving part 142 are accommodated in the lower case 38a, the moving part 40 is accommodated in the upper case 38b, and the lower case 38a, the upper case 38b, Are stacked in two steps.

  The gear mechanism 148 includes a first rack 150 provided on the side surface of the auxiliary moving unit 142 and extending in the moving direction, a second rack 152 provided on the side surface of the moving unit 40 and extending in the moving direction, and a first rack 150. And a pinion 154 engaged with each of the rack 150 and the second rack 152. The first rack 150 and the second rack 152 are orthogonal to each other when the lower case 38 a and the upper case 38 b are stacked in two upper and lower stages, and the pinion 154 includes the first rack 150 and the second rack 152. Are attached to the lower case 38a so as to be rotatable.

  When the moving unit 40 is retracted in the shock absorber main body 140, the auxiliary moving unit 142 is moved by the retracting means 46 in a direction orthogonal to the direction in which the door 16 is closed. Then, the movement of the auxiliary moving unit 142 is transmitted from the first rack 150 to the moving unit 40 via the pinion 154 and the second rack 152, and the moving unit 40 is moved in the direction to close the door 16.

  However, the angle formed between the expansion / contraction direction of the tension coil spring 108 or the compression coil spring 134 and the movement direction of the moving portion 40 is not limited to 90 degrees as shown in FIG. 19, FIG. 20, or FIG. It is. Further, as the “direction changing means”, a cam mechanism or a link mechanism may be used in addition to the bar 144, the wire 146, or the gear mechanism 148.

  In the above embodiment, the pull-in means 46 is constituted by the tension coil spring 108 and the damper 110. However, as shown in FIG. 23, a torsion coil spring 156 may be used instead of the tension coil spring 108. .

  In the shock absorber main body 158 shown in FIG. 23, the torsion coil spring 156, the damper 110, and the link mechanism 160 constitute the retracting means 162, and the restoring force of the torsion coil spring 156 is transmitted to the moving unit 40 via the link mechanism 160. It is a thing.

  The link mechanism 160 includes a first rod-shaped link 160a, a second rod-shaped link 160b, and a joint 160c, and one end of the first rod-shaped link 160a and one end of the second rod-shaped link 160b rotate via the joint 160c. It is connected freely. A locking protrusion 164 protruding upward and a sliding protrusion 166 protruding downward are formed at the other end of the first rod-shaped link 160a, and the other end of the second rod-shaped link 160b is formed at the other end. Is formed with a circular through hole 168 penetrating in the vertical direction.

  Further, on the bottom surface of the case 38 in the shock absorber main body 158, a groove 170 extending in the moving direction of the moving unit 40, a support protrusion 172 that supports the link mechanism 160 and the torsion coil spring 156, and a support protrusion 174 that supports the damper 110 are provided. Is formed.

  When the retracting means 162 is configured, the locking protrusion 164 of the link mechanism 160 is locked to the moving portion 40, the sliding protrusion 166 is slidably inserted into the groove 170, and the through-hole 168 is the supporting protrusion. 172 is rotatably fitted. Further, the torsion coil spring 156 is fitted to the support protrusion 172 via the spacer 176, one end of the torsion coil spring 156 is locked to the side wall of the case 38, and the other end is provided to the second rod-shaped link 160 b of the link mechanism 160. The hole 178 is locked. The cylinder 112 of the damper 110 is rotatably attached to the support protrusion 174, and the piston 114 of the damper 110 is connected to the joint 160c of the link mechanism 160.

  In a natural state in which no external force is applied to the torsion coil spring 156, as shown in FIG. 24A, the other end of the torsion coil spring 156 is disposed at a position away from the groove 170, and the second rod-like link 160b of the link mechanism 160. Is disposed at a position substantially orthogonal to the groove 170. Therefore, the other end of the first rod-shaped link 160 a is disposed at the rear end portion of the groove 170, and accordingly, the moving unit 40 is disposed inside the case 38. That is, the moving unit 40 is pulled into the case 38.

  When the moving part 40 joined to the joining member 36 is moved forward when the door 16 is opened, the other end of the first rod-shaped link 160a connected to the moving part 40 as shown in FIG. Is moved forward, and accordingly, the second rod-shaped link 160 b is rotated about the support protrusion 172 against the bias of the torsion coil spring 156. Therefore, in a state where the moving unit 40 is pulled out, the restoring force of the torsion coil spring 156 can be applied to the moving unit 40 as a “retraction force”. In addition, when the moving unit 40 is retracted, the piston 114 of the damper 110 is pushed into the cylinder 112 as the joint 160c moves, so that the speed control function of the damper 110 can be effectively exhibited.

  In the shock absorbers of the above-described embodiments, the shock absorber main bodies 34, 136, 138, 140, 158 are attached to the opening 12, and the joining member 36 is attached to the doors 16, 182. Conversely, the joining member 36 may be attached to the opening 12 and the shock absorber main bodies 34, 136, 138, 140, and 158 may be attached to the doors 16 and 182.

  Further, the shock absorbers of the above-described embodiments may be applied to a “sliding door” as shown in FIG. 25 in addition to the “folding door” as shown in FIGS. 1 and 2. In the door structure 180 illustrated as an example of the “sliding door”, the door 182 is reciprocated in a direction parallel to the main surface (the left-right direction in FIG. 25), thereby opening and closing the opening 12. Therefore, in the door structure 180, the joining member 36 and the shock absorber main body 34 (136, 138, 140, 158) constituting the shock absorber 18 are parallel to the main surface of the door 182 (opening / closing direction). Will be arranged facing each other.

  Furthermore, in the shock absorber of each of the above-described embodiments, the distal end portion of the operation member 92 may be configured to freely swing, and the distal end portion may move according to the angle of the door 16. In this case, the distal end portion of the operation member 92 and the joining member 36 can be joined more smoothly and reliably.

Partial sectional plan view showing the door structure (folding door) Front view showing door structure (folding door) Perspective view showing shock absorber main body Top view showing shock absorber body Perspective view showing the case The perspective view which shows a moving part, a junction part, and a holding mechanism Diagram showing the operation of the shock absorber (when opening the door) Diagram showing the operation of the shock absorber (when closing the door) Partial sectional plan view showing a modified example of the holding mechanism The perspective view which shows the lock member used with the holding mechanism shown in FIG. The figure which shows operation | movement (when opening a door) of the holding mechanism shown in FIG. The figure which shows operation | movement (when a door is closed) of the holding mechanism shown in FIG. Partial sectional plan view showing a modified example of the holding mechanism The perspective view which shows the lock member used with the holding mechanism shown in FIG. The figure which shows operation | movement (when a door is opened) of the holding mechanism shown in FIG. The figure which shows operation | movement (when a door is closed) of the holding mechanism shown in FIG. The figure which shows the modification of the lock member used with the holding mechanism shown in FIG. The top view which shows the modification of a holding mechanism and drawing-in means Plan view showing another shock absorber body (using bar) Plan view showing another shock absorber body (using wire) A perspective view showing another shock absorber main body (using a gear mechanism) The disassembled perspective view which shows the shock absorber main body shown in FIG. An exploded perspective view showing another shock absorber main body (using a torsion coil spring and a link mechanism) The perspective view which shows operation | movement of the buffering device main body shown in FIG. Front view showing another door structure (sliding door)

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Door structure 16,182 ... Door 18 ... Shock absorber 28 ... Door panel 34,136,138,140,158 ... Shock absorber main body 36 ... Joining member 38 ... Case 38c ... Front end surface 40 of case ... Moving part 42 ... Joining Portion 44 ... Holding mechanism 46 ... Retracting means 48a, 48b ... Lid 82 ... Through hole 84 ... Bearing hole 86 ... Magnet housing space 90 ... Magnet 92 ... Operation member 94 ... Compression coil springs 96, 116, 118 ... Lock member 104 ... Lock Main body 106 ... Rotating shaft 108 ... Tension coil spring 110 ... Damper 112 ... Cylinder 114 ... Piston 132a, 132b ... Magnet 142 ... Auxiliary moving part 144 ... Bar 146 ... Wire 148 ... Gear mechanism

Claims (6)

A door cushioning device that reduces the impact applied to the door and the opening by attenuating the momentum of the door when closing the door provided in the opening, wherein either the door or the opening A shock absorber main body attached to the door, and a joining member attached to either the door or the opening,
The shock absorber main body is configured to be movable in the opening and closing direction of the door, and a joint portion that is provided in the moving portion and is detachably joined to the joining member immediately before the door is closed. A holding mechanism that holds the moving part at a predetermined standby position and releases the holding state of the moving part when the joining member is joined to the joining part; and A door cushioning device having pull-in means for pulling in while controlling the speed of the moving section until the door is closed when the holding state is released.   The holding mechanism is provided in the moving part so as to be movable in the opening / closing direction of the door, and protrudes from a front end surface of the moving part when the door is opened and the joining part is detached from the joining member, and An operation member pushed back by the door moved in the closing direction, and when the operation member protrudes forward from a front end surface of the moving unit, the pulling means prohibits the pulling of the moving unit, and The door cushioning device according to claim 1, further comprising: a lock member that enables the moving unit to be retracted by the retracting means when the protruding operation member is pushed back.   The door cushion according to claim 1, wherein the pulling means includes a spring that applies a force required for pulling to the moving unit, and a damper that applies a force required for speed control to the moving unit. apparatus.   The pull-in means includes a tension coil spring or a compression coil spring that applies a force required for pulling to the moving part, and the tension coil spring or the compression coil spring has an expansion / contraction direction orthogonal to the movement direction of the moving part. The door cushioning device according to claim 1, wherein a force of the tension coil spring or the compression coil spring is applied to the moving unit via a direction changing unit.   The pull-in means includes a link mechanism connected to the moving unit, a torsion coil spring that applies a force required for pulling to the moving unit via the link mechanism, and speed control to the moving unit via the link mechanism. The door cushioning device according to claim 1, further comprising a damper that applies a required force. An opening frame provided in the opening, a door provided in the opening frame, and a shock absorber that reduces the impact applied to the door and the opening by attenuating the momentum of the door when closing the door. It is a door structure, and the shock absorber includes a shock absorber main body attached to either the door or the opening, and a joining member attached to either the door or the opening. And
The shock absorber main body is configured to be movable in the opening and closing direction of the door, and a joint portion that is provided in the moving portion and is detachably joined to the joining member immediately before the door is closed. A holding mechanism that holds the moving part at a predetermined standby position and releases the holding state of the moving part when the joining member is joined to the joining part; and A door structure having pull-in means for pulling in while controlling the speed of the moving unit until the door is closed when the holding state is released.

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