JP2009138400A - Sliding door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manually open a manually opening/closing sliding door lightly with a small force in a manually opening/closing sliding door device capable of applying a brake to the sliding door just before the sliding door is fully closed. <P>SOLUTION: The upper end of the sliding door 1 is slidably fitted into a groove 2a in the lower surface of the upper frame 2 of an entrance. A braking device 9 for applying a brake just before the sliding door 1 is fully closed is buried in a recessed part 10 in the upper end of the sliding door 1. The braking device 9 comprises: a sliding door pulling means 13 having a rope 12 delivered from a power spring case 11; a damper 14 for damping by applying a brake just before the sliding door 1 is fully closed; a magnet 16 secured to the end of the piston rod 14a of the damper 14 integrally with the other end of the rope 12 and having an upper end positioned in the groove 2a of the upper frame 2; a magnetic body 17 so installed in the recessed part 10 as to be attracted to the magnet 16 at a slight interval; and a contact member 18 with which the magnet 16 is brought into contact for attraction just before the sliding surface 1 is fully closed in the groove 2a of the upper frame 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sliding door device in which a brake is applied when a sliding door is closed (a state immediately before the sliding door is completely closed) or when a sliding door is opened (a state immediately before the sliding door is completely opened) in a manually opening / closing type sliding door. Is.

In this type of conventional manually openable / closable sliding door, for example, a device disclosed in Patent Document 1 is known as a sliding door device in which a brake is applied when the sliding door is closed.
What is disclosed in Patent Document 1 is “a case in which an entrance guide groove of an engagement pin provided in a sliding door or a drawer is formed along an opening / closing direction, and the opening / closing direction of the sliding door or the drawer in the case. The slider has a rack gear formed along the sliding direction, and one end is locked to the slider, the other end is locked to the case, and the sliding door or drawer is pulled into the slider. A spring member for applying a biasing force in a direction, a rotary damper having a pinion gear meshing with the rack gear, and an engagement that is swingably provided on the slider and engages with a slide guide groove formed in the case It has a protrusion and is in a relationship of engaging with and disengaging from an engaging pin that has entered the entrance guide groove of the case when the sliding door or drawer is opened and closed. The sliding guide groove is formed with a temporary stop portion formed of a bent guide groove continuously from the slide guide groove, and is engaged with the opening operation of the sliding door or the drawer. The operating cam and the slider are moved to the opening side against the biasing force of the spring member via the pin, and the engagement protrusion is guided to the bending guide groove side at the opening side end of the slide guide groove. As a result, the operating cam swings and the engagement pin is disengaged, and the engaging protrusion of the operating cam is engaged with the bent guide groove to be temporarily stopped. As the drawer is closed, the engagement pin swings the operating cam to release the temporary stop state, and the slider receives the braking force from the rotary damper while being biased by the spring member. Thereby moving the interference side, the actuating cam sliding door or drawer retraction device was set to pull up to the position tight sliding door or drawer via the engagement pin. "A.

As is clear from the above configuration, the retracting device disclosed in Patent Document 1 uses a spring member as means for applying a biasing force in the retracting direction to the sliding door.
JP 2006-299578 A

  In the configuration of the retracting device described in Patent Document 1, a spring member is used to apply a biasing force in the retracting direction to the sliding door, and when the sliding door is manually opened, a force is applied in the direction of pulling and extending the spring member. As a result, there is a problem that the sliding door feels very heavy.

  SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and is a manually openable / closable sliding door device in which a brake is applied when the sliding door is closed or opened, and the sliding door is manually opened or closed. The object is to provide a sliding door device that can be lightly operated with a small force.

  In the sliding door device according to claim 1 of the present invention, the upper end of the sliding door provided to be freely opened and closed in the opening serving as the doorway is slidably fitted in a groove formed in the lower surface of the upper frame of the doorway. A braking device is embedded in the recess at the upper end of the sliding door to apply the brake immediately before the sliding door is completely closed, and the braking device is extended from the mainspring spring case containing the mainspring spring and one end of the mainspring is pulled out from the mainspring spring case. A sliding door retracting means composed of a wire or other cable-like body fixed to a reel around which a spring is wound, a damper for buffering and buffering immediately before the sliding door is completely closed, and a tip of the piston rod of the damper A magnet fixed integrally with the other end of the cord-like body and having an upper end positioned in a groove formed in the lower surface of the upper frame; and a mainspring spring case A magnet provided in a fixed position in the recess so as to be attracted to the magnet with a small gap so as to hold the state in which the substantially full length of the piston rod of the damper protrudes by a predetermined length. And a contact member made of a magnetic material such as iron provided so that the magnet comes into contact with and adsorbs at a position before the sliding door closes in a groove formed on the lower surface of the upper frame. The rear ends of the mainspring spring case and the damper case are directed toward the door bottom of the sliding door, and the tip of the piston rod of the damper and the magnet are directed toward the door end of the sliding door. Thus, the braking device is housed.

  The sliding door device according to claim 2, wherein the upper end of the sliding door provided to be freely opened and closed in the opening serving as the doorway is slidably fitted in a groove formed in the lower surface of the upper frame of the doorway, and the upper end of the sliding door A braking device is embedded in the recess of the main body in order to apply the brake immediately before the sliding door is fully opened. The braking device is extended from the mainspring spring case containing the mainspring spring, and one end of the mainspring spring is wound around the mainspring spring case. A sliding door retracting means comprising a wire or other cord fixed to a rotating reel, a damper for braking and buffering immediately before the sliding door is completely opened, and the cord at the tip of the piston rod of the damper A magnet that is fixed integrally with the other end of the upper frame and has an upper end positioned in a groove formed in the lower surface of the upper frame, and a cord-like body from the mainspring spring case. A magnetic body such as a magnet provided in a fixed position in the recess so as to attract with a small gap with the magnet so as to maintain a state in which the piston rod of the damper protrudes substantially the entire length. A contact member made of a magnetic material such as iron provided so that the magnet comes into contact with and adsorbs at a position before the sliding door opens in a groove formed in the lower surface of the upper frame, The braking device is placed in the recess at the top of the sliding door so that the rear end of the mainspring spring case and the damper case is directed toward the door of the sliding door and the tip of the piston rod of the damper and the magnet are directed toward the door bottom of the sliding door. It is stored.

  The sliding door device according to claim 3, wherein the upper end of the sliding door provided in the opening serving as the doorway is suspended by the rail and can be opened and closed along the rail, and the sliding door is located in the recess at the upper end or the lower end of the sliding door. A braking device is embedded to apply the brake immediately before the spring is completely closed, and the braking device is extended from the mainspring spring case containing the mainspring spring, and one end is fixed to the reel around which the mainspring spring is wound. A sliding door pull-in means comprising a cable-like body such as a wire, a damper for braking and buffering immediately before the sliding door is completely closed, and the other end of the cord-like body at the end of the piston rod of this damper A magnet which is fixed to the upper end or the lower end of the magnet and is located in a groove formed in the rail or the upper surface of the lower frame; A cord-like body is pulled out from the spring case by a predetermined length, and the position is fixed in the recess so as to attract the magnet with a slight gap so as to maintain the state in which the almost full length of the piston rod of the damper is maintained. And a magnetic material such as iron provided so that the magnet comes into contact with and adsorbs at a position before the sliding door closes in the rail or the groove formed in the upper surface of the lower frame. And a rear end portion of the mainspring spring case and the damper case is directed toward the door bottom of the sliding door in the recess at the upper end or lower end of the sliding door, and the tip of the piston rod of the damper and The braking device is housed so that the magnet faces the sliding door.

  5. The sliding door device according to claim 4, wherein the upper end of the sliding door provided in the opening serving as the doorway is suspended by the rail and can be opened and closed along the rail, and the sliding door is disposed in the recess at the upper end or the lower end of the sliding door. A braking device is embedded in order to apply the brake immediately before fully opening, and the braking device is extended from the mainspring spring case containing the mainspring spring, and one end is fixed to the reel around which the mainspring spring is wound. A sliding door pull-in means composed of a cable-like body such as a wire, a damper for braking and buffering immediately before the sliding door is fully opened, and the other end of the cord-like body at the tip of the piston rod of this damper A magnet that is fixed to the upper end or the lower end of the magnet and is located in a groove formed in the rail or the upper surface of the lower frame, and the mainspring. A cord-like body is pulled out from the case for a predetermined length, and is fixed in the recess so as to be attracted with a slight gap with the magnet so as to maintain a state in which almost the entire length of the piston rod of the damper protrudes. Magnetic material, such as a magnet, and a magnetic material, such as iron, provided so that the magnet comes into contact with and adsorbs at a position before the sliding door opens in the groove formed in the rail or the upper surface of the lower frame The spring spring case and the rear end of the damper case face the door end of the sliding door in the recess at the upper or lower end of the sliding door, and the tip of the piston rod of the damper and the magnet The braking device is housed so that the door faces in the direction of the door bottom of the sliding door.

  According to a fifth aspect of the present invention, there is provided a sliding door device comprising a shock absorbing compression spring for receiving the rear end portion of the damper case and absorbing the shock.

  As described above, in the sliding door device of the present invention, when the sliding door is manually closed, even when the sliding door is manually closed strongly, the magnet contacts the contact member when the sliding door is closed, and the contact member is adsorbed at that moment. As the magnet leaves the magnetic body and the cord-like body is wound up in the mainspring spring case, a force is applied in the direction of closing the sliding door, the sliding door tries to move in the closing direction, and after the magnet contacts the contact member, the mainspring spring Due to the winding force of the cord-like body, the piston rod of the damper moves in the direction to be pushed into the case, and the sliding door can be closed at a low speed while the brake is applied. The sliding door device of the present invention uses a mainspring spring to move the sliding door in the closing direction from when it is closed, and when starting to open the sliding door, a force to pull out the cord-like body from the mainspring spring case is applied. Compared to the case where such a spring member is used, the sliding door can be moved very lightly. Similarly, when the sliding door is manually opened, the sliding door can be closed at a low speed by applying a brake when the sliding door is opened. The sliding door device of the present invention uses a mainspring spring to move the sliding door in the opening direction from the time of opening, and when the sliding door starts to close, a force to pull out the cord-like body from the mainspring spring case is applied. Compared with the case where such a spring member is used, the sliding movement of the sliding door becomes very light. Furthermore, by providing a shock absorbing compression spring to absorb the shock by receiving the rear end of the damper case, even if the sliding door is manually closed strongly or the sliding door is manually opened strongly, The impact of the magnet on the contact member can be absorbed by the action of the damper piston rod being pushed into the case and the compression spring after the damper, and the front end of the sliding door (the lower end of the rear end relative to the direction of movement) Can be prevented).

Embodiments of the present invention will be specifically described below with reference to the drawings.
First, the first embodiment shown in FIGS. 1 to 5 will be described. Reference numeral 1 denotes a sliding door that is manually opened and closed, and at an indoor predetermined position, an upper frame 2, a door-end side frame 3, and a door-end side frame. An opening 6 serving as an entrance formed by the frame 4 and the lower frame 5 is provided so as to be freely opened and closed.

  The upper end of the sliding door 1 is slidably fitted into a groove 2a formed on the lower surface of the upper frame 2, and the lower end of the sliding door 1 has door wheels 7 and 7 provided at positions close to the door tip and the door bottom. The sliding door 1 can be freely opened and closed by being fitted into a groove 5 a formed in the lower frame 5. Reference numeral 8 denotes a finger hook portion formed at a position closer to the door tip on the front and back surfaces of the sliding door 1.

  A braking device 9 is embedded at the upper end of the sliding door 1 to apply a brake when the sliding door 1 is closed. Reference numeral 10 denotes a recess formed long at the upper end of the sliding door 1 in the direction of the door tip and the door butt, and the braking device 9 is embedded in the recess 10.

  The braking device 9 includes a mainspring spring case 11 that houses a mainspring spring (not shown), and a cord-like body 12 such as a wire that is fed from the mainspring spring case 11 and fixed at a reel 11a around which the mainspring spring is wound. The sliding door retracting means 13, the damper 14 for braking and buffering when the sliding door 1 is closed, and the other end of the cord 12 attached to the tip of the piston rod 14 a of the damper 14 are integrally fixed. In addition, the magnet mounting member 15 for mounting the magnet integrally, and the hole 15a penetrating in the vertical direction of the magnet mounting member 15, the lower end is exposed from the lower end of the hole 15a, and the upper end is the upper frame 2 The magnet 16 provided so as to be positioned in the groove 2a formed on the lower surface, and the cord-like body from the mainspring spring case 11 2 is pulled out by a predetermined length, and is provided in a fixed position in the recess 10 so as to be attracted to the magnet 16 with a slight gap so as to maintain a state in which almost the entire length of the piston rod 14a of the damper 14 protrudes. Magnetic material 17 such as a magnet and a magnetic material such as iron provided so that the magnet 16 comes into contact with and adsorbs at a position before the sliding door 1 closes in a groove 2a formed on the lower surface of the upper frame 2. A contact member 18 made of a material, and a shock absorbing compression spring 19 provided between a rear end portion of the case 14b of the damper 14 and the mainspring spring case 11, and the mainspring spring case 11 and The parts excluding the magnetic body 17 and the contact member 18 are housed in a rail-shaped recess 21 of a long mold 20 fitted in the recess 10.

  The braking device 9 is housed in the recessed portion 10 of the sliding door 1 in a state in which parts excluding the mainspring spring case 11, the magnetic body 17, and the contact member 18 are built in the rail-shaped recessed portion 21 of the elongated mold member 20. At that time, the rear end portions of the mainspring spring case 11 and the case 14b of the damper 14 are directed toward the door bottom of the sliding door 1, and the tip of the piston rod 14a of the damper 14 and the magnet 16 are directed to the door end of the sliding door 1. It is stored so that it faces. In the state where the sliding door 1 is closed, the magnetic body 17 is configured to be located closer to the door end side of the sliding door 1 than the contact member 18.

  In the sliding door device provided with the braking device 9 as described above, when the sliding door 1 is open, the cord-like body 12 is drawn out from the mainspring spring case 11, and the piston rod 14a is almost fully extended from the case 14b of the damper 14. The magnet 16 attracts and holds the magnetic body 17 in this state. The sliding door 1 is manually closed. Even when the sliding door 1 is manually closed, when the sliding door 1 is closed, the magnet 16 abuts against the contact member 18 to attract the contact member 18, and the instantaneous magnet 16 As the wire 12 moves away from the magnetic body 17 and is wound in the mainspring spring case 11 and a force is applied in the closing direction of the sliding door 1, the sliding door 1 tries to move in the closing direction. After the contact with 18, the winding force of the cord-like body 12 by the mainspring spring moves in a direction in which the piston rod 14 a of the damper 14 is pushed into the case 14 b, and the sliding door 1 is closed on the door side side while being braked. It closes at a low speed until it contacts the frame 3.

  When the sliding door 1 is manually closed strongly, depending on the force, the magnet 16 may come into contact with the contact member 18 and the sliding door 1 may be turned forward, that is, the bottom end of the sliding door 1 may be lifted. In the sliding door device according to the present embodiment, the shock absorbing compression spring 19 provided between the rear end portion of the case 14b of the damper 14 and the mainspring spring case 11 is provided as described above. Can be absorbed by the action of the piston rod 14a of the damper 14 being pushed into the case 14b and the compression spring 19 after the damper 14 even if it is manually closed strongly. The slippage in front of the sliding door 1 can be prevented.

  When the closed sliding door 1 is opened manually, the sliding door 1 is opened halfway with the magnet 16 adsorbing the contact member 18, while the cord-like body 12 is pulled out from the mainspring spring case 11 and the damper. The piston rod 14a of the 14 is also in a state where the entire length protrudes. At that time, the magnetic body 17 is attracted by the magnet 16 and the cord-like body 12 is pulled out from the mainspring spring case 11, and the piston rod 14a of the damper 14 is The state in which the entire length protrudes is maintained, and in this state, the magnet 16 is separated from the contact member 18 and the sliding door 1 is opened until it hits the door bottom side frame 4. When the sliding door 1 is opened, the extra force is applied to the sliding door 1 when the sliding door 1 starts to open. The force that pulls the magnet 16 away from the contact member 18 and the force that pulls the cord-like body 12 from the mainspring spring case 11. And the opening movement of the sliding door 1 becomes very light compared with the case where a spring member is used.

  By the way, in the embodiment described above, the magnetic body 17 that attracts the magnet 16 may be an iron plate. The magnetic body 17 can be attached to the front end of the rail-shaped recess 21 of the mold member 20 so as to attract the magnet 16 with a slight gap. Further, the compression spring 19 for absorbing the shock may be disposed so as to receive the rear end portion of the case 14b of the damper 14 and absorb the shock, and the compression spring 19 is not necessarily limited to the rear end portion of the case 14b of the damper 14. And the mainspring spring case 11 may not be provided.

  Next, the second embodiment shown in FIG. 6 will be described. In the first embodiment described above, the sliding door 1 is braked when the sliding door 1 is closed. In the embodiment, sliding doors are symmetrically arranged so as to be applied to the door end side and the door bottom side of the sliding door 1 so that the brake is applied both when the sliding door 1 is closed and when it is opened, that is, the sliding door 1 is divided into left and right when viewed from the front. 1 is embedded with braking devices 9 and 9A. The disposition state of the braking device 9 on the door end side is the same as that of the first embodiment, and the braking device 9A on the door end side is disposed facing the opposite side of the braking device 9 on the door end side. Yes. That is, the braking device 9A on the door bottom side is embedded in the recess 10 at the upper end of the sliding door 1 to apply the brake immediately before the sliding door 1 is fully opened, and this braking device 9A accommodates the mainspring spring. A sliding door pull-in means 13 comprising a mainspring spring case 11 and a cord-like body 12 such as a wire which is fed from the mainspring spring case 11 and one end of which is wound around the mainspring spring, and immediately before the sliding door 1 is completely opened. And a damper 14 for braking and buffering, and a groove 2a formed integrally with the other end of the cord-like body 12 at the tip of the piston rod 14a of the damper 14 and having an upper end formed on the lower surface of the upper frame 2 And a magnet 16 provided to be positioned at a position, and a cord 12 is pulled out from the mainspring spring case 11 by a predetermined length, and the piston of the damper 14 A magnetic body 17 such as a magnet provided in a fixed position in the recess 10 so as to be attracted to the magnet 16 with a slight gap so as to maintain a state in which the substantially entire length of the pad 14a protrudes; A contact member 18 made of a magnetic material such as iron is provided so that the magnet 16 comes into contact with and adsorbs in a position before the sliding door 1 opens in a groove 2a formed in the lower surface of the upper frame 2. The rear ends of the mainspring spring case 11 and the case 14b of the damper 14 face the direction of the door of the sliding door 1 in the recess 10 at the upper end of the sliding door 1, and the tip of the piston rod 14a of the damper 14 and the magnet 16 are the sliding door. The braking device 9A is accommodated so as to face the door-toe 1 of 1. The braking device 9A on the door bottom side also includes a shock absorbing compression spring 19 for receiving the rear end portion of the case 14b of the damper 14 and absorbing the shock. Other configurations are the same as those of the first embodiment.

  Next, the third embodiment shown in FIG. 7 to FIG. 8 will be described. In the first and second embodiments, the sliding door 1 is in a groove 2a formed on the lower surface of the upper frame 2 of the entrance / exit. In the third embodiment, the sliding door 1 is hung on a rail 22 attached in a groove 2a formed in the lower surface of the upper frame 2 of the entrance / exit. The braking devices 9 and 9A are embedded in the recess 10 at the upper end of the sliding door 1 in the same manner as in the first and second embodiments. The upper ends of the magnets 16 of the devices 9 and 9A are located in the rail 22, and the magnets 16 abut on the rail 22 at a position before the sliding door 1 closes and a position before the sliding door 1 opens. Each contact member 18 is provided as That. In addition, the door 22 attached to the upper end of the sliding door 1 is received on the rail 22, and the sliding door 1 can be opened and closed. The door wheel 23 moves when the sliding door 1 is opened and closed, but the door wheel 23 is configured not to contact the contact member 18. Other configurations are the same as those of the second embodiment.

  By the way, in this 3rd Embodiment, although braking device 9 and 9A are embed | buried under the upper end of the sliding door 1, the lower end of the sliding door 1 suspended by the rail 22 was formed in the upper surface of the lower frame 5 of the entrance / exit. The magnets 16 are slidably positioned in the grooves, and the magnets 16 are positioned in the grooves formed on the upper surface of the lower frame 5. 18 may be provided.

As described above, in the sliding door device suspended from the rail 22, the braking devices 9 and 9 </ b> A can be provided on either the upper end or the lower end of the sliding door 1.
Furthermore, in the second and third embodiments, the braking devices 9 and 9A are provided on the door end side and the door bottom side of the sliding door 1, respectively, but on either the door tip side or the door bottom side of the sliding door 1 Only the braking device 9 or 9A may be provided.

  By the way, as the damper 14 used in each of the above-described embodiments, an air damper, an oil damper, or the like can be used.

It is a front view showing the whole sliding door device in the state where the sliding door in the 1st embodiment of the present invention was opened. It is a front view showing the whole sliding door device in the state where the same sliding door was closed. It is the perspective view seen from the upper direction of the braking device embed | buried under the upper end of the sliding door. It is a principal part expanded sectional front view of the sliding door apparatus in the state in which the sliding door was opened. It is a principal part expanded sectional front view of the sliding door apparatus in the state in which the sliding door was closed. It is a front view which shows the principal part of the sliding door apparatus in the state by which the sliding door in the 2nd Embodiment of this invention was closed. It is a front view which shows the principal part of the sliding door apparatus in the state by which the sliding door in the 3rd Embodiment of this invention was closed. It is principal part side surface sectional drawing of the sliding door apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding door 2 Upper frame 2a Groove 3 Door end side eaves frame 4 Door bottom side eave frame 5 Lower frame 5a Groove 6 Opening part 7 Door 8 Finger hook part 9, 9A Braking device 10 Recessed part 11 Spring spring case 11a Reel 12 Cord-like body 13 Sliding door retracting means 14 Damper 14a Piston rod 14b Case 15 Magnet mounting member 15a Hole 16 Magnet 17 Magnetic body 18 Contact member 19 Compression spring 20 Mold material 21 Recess 22 Rail 23 Door

Claims (5)

The upper end of the sliding door that can be opened and closed in the opening serving as the doorway is slidably fitted in a groove formed on the lower surface of the upper frame of the doorway, and the sliding door is completely closed in the recess at the upper end of the sliding door. A braking device is embedded to apply the brake immediately before, and the braking device includes a mainspring spring housing the mainspring spring and a wire that is fed from the mainspring spring case and fixed to a reel around which the mainspring is wound. A sliding door pull-in means comprising a cord-like body, a damper for braking and buffering immediately before the sliding door is completely closed, and an upper end fixed integrally with the other end of the cord-like body at the tip of the piston rod of the damper A magnet provided so as to be positioned in a groove formed in the lower surface of the upper frame, and a cord-like body drawn out from the mainspring spring case by a predetermined length, and the damper A magnetic body such as a magnet provided in a fixed position in the recess so as to attract the magnet with a slight gap so as to maintain a state in which the substantially entire length of the piston rod protrudes; A recess formed at the upper end of the sliding door, which is made up of a contact member made of a magnetic material such as iron provided so that the magnet comes into contact with and adsorbs at a position before the sliding door closes in a groove formed on the lower surface. The braking device is housed in such a way that the rear end of the mainspring spring case and the damper case is directed toward the door bottom of the sliding door, and the tip of the damper piston rod and the magnet are directed toward the door end of the sliding door. A sliding door device. The upper end of the sliding door that can be opened and closed in the opening serving as the doorway is slidably fitted in a groove formed on the lower surface of the upper frame of the doorway, and the sliding door opens completely in the recess at the upper end of the sliding door. A braking device is embedded to apply the brake immediately before, and the braking device includes a mainspring spring housing the mainspring spring and a wire that is fed from the mainspring spring case and fixed to a reel around which the mainspring is wound. A sliding door pull-in means comprising a cord-like body, a damper for braking and buffering immediately before the sliding door is fully opened, and an upper end fixed integrally with the other end of the cord-like body at the tip of the piston rod of the damper A magnet provided so as to be positioned in a groove formed in the lower surface of the upper frame, and a cord-like body is pulled out from the mainspring spring case by a predetermined length, and the damper A magnetic body such as a magnet provided in a fixed position in the recess so as to attract the gap between the magnet and the magnet so as to maintain a state in which the entire length of the stone rod protrudes, and a lower surface of the upper frame And a contact member made of a magnetic material such as iron provided so that the magnet comes into contact with and adsorbs at a position before the sliding door opens in the groove formed in the groove, and in a recess at the upper end of the sliding door Check that the braking device is housed so that the rear end of the mainspring spring case and damper case faces the door end of the sliding door, and the tip of the piston rod of the damper and the magnet point toward the door bottom of the sliding door. Characteristic sliding door device. The upper end of the sliding door provided in the opening serving as the doorway is suspended from the rail and can be opened and closed along the rail. The brake is applied immediately before the sliding door is completely closed in the recess at the upper or lower end of the sliding door. A braking device is embedded in the main body, and the braking device includes a mainspring spring case that houses a mainspring spring, and a wire-like body such as a wire that is fed from the mainspring spring case and fixed at one end to a reel around which the mainspring spring is wound. The sliding door retracting means, a damper for braking and buffering immediately before the sliding door is completely closed, and the end of the piston rod of the damper are fixed integrally with the other end of the cord-like body, and the upper end or the lower end is in the rail. Alternatively, a cord-like body is placed from the magnet provided so as to be positioned in a groove formed on the upper surface of the lower frame and the mainspring spring case. A magnetic body such as a magnet provided in a fixed position in the recess so as to be attracted to the magnet with a slight gap so as to maintain a state in which the length of the piston rod of the damper protrudes substantially the entire length. And a contact member made of a magnetic material such as iron provided so that the magnet comes into contact with and adsorbs at a position before the sliding door closes in a groove formed in the rail or the upper surface of the lower frame. The spring spring case and the rear end of the damper case are directed toward the door bottom of the sliding door, and the tip of the piston rod of the damper and the magnet are directed toward the door end of the sliding door. A sliding door device characterized in that a braking device is housed so as to face. The upper end of the sliding door provided in the opening serving as the doorway is suspended from the rail and can be opened and closed along the rail, and the brake is applied immediately before the sliding door is fully opened in the recess at the upper or lower end of the sliding door. A braking device is embedded in the main body, and the braking device includes a mainspring spring case that houses a mainspring spring, and a wire-like body such as a wire that is fed from the mainspring spring case and fixed at one end to a reel around which the mainspring spring is wound. The sliding door retracting means, a damper for braking and buffering immediately before the sliding door is completely opened, and the other end of the cord-like body are integrally fixed to the tip of the piston rod of the damper, and the upper end or the lower end is in the rail. Alternatively, a cord-like body is formed to a predetermined length from the magnet provided so as to be positioned in a groove formed on the upper surface of the lower frame and the mainspring spring case. A magnetic body such as a magnet provided in a fixed position in the recess so as to attract and draw a slight gap with the magnet to maintain a state in which the piston rod of the damper protrudes substantially the entire length. It is composed of a contact member made of a magnetic material such as iron provided so that the magnet comes into contact with and adsorbs at a position before the sliding door opens in a groove formed in the rail or the upper surface of the lower frame. The rear end of the mainspring spring case and the damper case are oriented in the direction of the door of the sliding door, and the tip of the piston rod of the damper and the magnet are oriented in the direction of the door edge of the sliding door in the recess at the upper end or lower end of the sliding door. A sliding door device characterized in that a braking device is housed in the door. The sliding door device according to any one of claims 1 to 4, further comprising a shock absorbing compression spring for receiving the rear end portion of the damper case and absorbing the shock.

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