JP4274987B2 - Sliding door braking equipment rack mounting mechanism - Google Patents

Description

  The present invention relates to a mechanism for mounting a sliding door rack for a sliding door.

As a conventional sliding door braking facility, for example, as disclosed in Patent Document 1, a rotatable shaft body is projected, and a predetermined forward rotation operation of the shaft body is reversed. Compared to the brake device, the brake device is operated while being braked, the pinion provided on the brake device side and rotating in conjunction with the shaft body, and the movement of the stationary member toward the door end in the closing direction of the sliding door Sometimes it is arranged on the side that meshes with the pinion and rotates the shaft body in the positive direction, and meshes with the pinion before the sliding door is completely closed during the sliding door closing operation, so that the shaft body is moved in the positive direction. A closing braking rack that performs the closing operation of the sliding door while braking by rotating it, and a symmetrical position on the opposite side to the side where the closing braking rack is disposed at a position near the door bottom of the fixed member. Arranged and sliding door open An opening brake rack that engages with the pinion and rotates the shaft body in the positive direction before the sliding door is completely opened at the time of operation and brakes the opening operation of the sliding door while braking. Braking equipment is known.
Japanese Patent No. 2730871

  In the sliding door braking facility disclosed in Patent Document 1, the closing braking rack and the opening braking rack are attached to a frame that suspends the sliding door so as to be movable in the opening and closing directions so as to mesh with the pinion. Yes. Specifically, the closed braking rack is inserted into a dovetail groove formed on the upper surface of the lower end plate portion of the frame, and the open braking rack is formed on the lower surface of the upper end plate portion of the frame attached to the upper side of the frame. Although it is inserted into the formed dovetail groove, when a worn or damaged rack is removed and replaced with a new rack, the frame must be removed, and there is a problem that the rack replacement is very troublesome. It was. Further, if there is a clearance, that is, so-called play, at the engaging portion between the rack and the dovetail groove, there is a problem that the rack hits the groove at the moment when the pinion engages with the rack when the sliding door is opened and closed, and impact noise is generated.

  SUMMARY OF THE INVENTION An object of the present invention is to solve such problems, and it is possible to easily replace a rack that is worn or damaged with respect to a dovetail groove and a new rack, and to generate an impact sound due to play of the rack in the dovetail groove. Another object of the present invention is to provide a mechanism for mounting a rack for a braking facility for a sliding door that can prevent the above.

The sliding door braking equipment rack mounting mechanism according to claim 1 of the present invention is configured such that the sliding door suspended from the rail automatically closes along the rail, and the sliding door has a predetermined direction at the upper end of the sliding door. The pinion is attached via a braking device that brakes the rotation operation of the rotation compared to the rotation operation in the reverse direction, and the pinion is meshed with a rack attached in the groove at a position close to the door along the rail, In the sliding door braking equipment configured to apply a braking force to the sliding door by rotating the pinion in the predetermined direction by meshing the rack and the pinion when the sliding door is closed, the upper end of the groove or bottom to form an opening to the extent that the rack comes out, the rack opposite longitudinal ends in there the groove is stopped by a stopper means, the longitudinal Of the stopper section of the end, at least one of the stopper means is constituted by a movable plate in the located groove, characterized in that a movable rack on the opening side by moving the plate.

Attachment mechanism of the braking equipment rack of the sliding door according to claim 2, sliding door which is suspended from the rail automatically configured to closing along the rails, the upper end of the sliding door, the predetermined rotating operation A pinion is attached via a braking device that brakes the rotating movement in the reverse direction, and the pinion is meshed with a rack that is close to the door tip along the rail and is installed in the groove to close the sliding door. In the sliding door braking equipment configured to apply a braking force to the sliding door by rotating the pinion in the predetermined direction by meshing the rack and the pinion during movement , the groove is located at a position shifted from the rack mounting position to the door bottom side. forming an opening degree exiting rack the upper end or the bottom, the rack opposite longitudinal ends in there the groove is stopped by a stopper means, the longitudinal Among the stopper means at the end, the stopper means that contacts at least the edge of the rack near the door butt is constituted by a plate movable in the dovetail groove, and the rack is moved to the opening side by moving this plate. It is possible to do this.

According to a third aspect of the present invention, there is provided the sliding door braking equipment rack mounting mechanism comprising means for pressing the end of the rack near the door bottom against the bottom of the groove.

  As described above, the sliding door braking equipment rack mounting mechanism according to the present invention forms an opening so that the rack can be pulled out at an appropriate position in the longitudinal direction of the dovetail groove. Of the stopper means at both ends in the longitudinal direction, at least one of the stopper means is constituted by a plate movable in the dovetail groove, and the rack can be moved to the opening side by moving the plate. Because there is, move the plate in the groove, move until the end of the rack reaches the opening, pull out the rack from the opening in this state, remove the worn or damaged rack, replace with a new rack be able to. In addition, a rack provided to apply the braking force when the sliding door is opened is configured such that the end of the rack near the door bottom of the rack provided to apply the braking force when the sliding door is closed is pressed against the bottom of the groove. Since the end of the rack near the door end is pressed against the bottom of the groove, the pinion does not rattle when the pinion enters the rack, and the pinion enters the rack. No impact sound is generated.

Embodiments of the present invention will be specifically described below with reference to the drawings.
First, the first embodiment shown in FIGS. 1 to 14 will be described. Reference numeral 1 denotes a sliding door, which is an upper frame 2 provided at a predetermined position such as an indoor doorway, a door-end side frame 3, a door. It is provided in an opening formed by the buttock side frame 4 and the floor 5.

Doors 8 and 9 are rotatably supported through brackets 6 and 7 extending upward at predetermined positions near the door tip and door butt near the upper end of the sliding door 1, respectively.
Further, an inclined frame 10 having a substantially L-shaped cross section is fixed to the upper frame 2 so as to be slightly inclined toward the door end side, and the door wheels 8 and 9 can roll on a rail 11 formed on the inclined frame 10. It is mounted on. Therefore, the sliding door 1 automatically closes when the doors 8 and 9 roll on the inclined rail 11 to the door end side by the weight of the sliding door 1.

  A guide roller 12 is installed on the floor 5 to guide the sliding door 1 in the opening / closing direction. A stopper roller 14 that is engaged with a stopper 13 provided near the door bottom of the inclined frame 10 is attached to the bracket 7 near the door bottom. An inspection cover 15 is provided on the front side of the upper frame 2.

  A brake device 16 is attached to the bracket 6 near the door. As shown in FIGS. 4 to 6, the braking device 16 includes a case main body 18 in which a sealed flow path 17 in which oil is sealed is formed, a lid body 19 attached to the case main body 18, and a pump chamber. 20, a gear pump 23 in which first and second gears 21 and 22 are arranged, a check valve 24 that allows oil to pass only in one direction, and an adjustment shaft portion 25a exposed to the outside. A flow rate adjustment valve 25 that can adjust the flow rate of oil by rotating is provided.

  A shaft body 27 to which the first gear 21 is fixed projects horizontally from the back side of the case body 18, and a pinion 28 is fixed to the projecting portion of the shaft body 27. The pinion 28 is made of metal or hard synthetic resin.

  As shown in FIG. 4, the closed flow path 17 of the braking device 16 includes first and second communication passages 17 a and 17 b communicating with meshing portions of the first and second gears 21 and 22, and the first and second communication passages 17 a and 17 b. The first and second main passages 17c and 17d for communicating between the second communication passages 17a and 17b and the check valve 24, the first and second communication passages 17a and 17b, and the tip of the flow rate adjusting valve 25 Is inserted into the first and second auxiliary passages 17e and 17f, and the first and second communication passages 17a and 17b are the first and second main passages. Branching into 17c, 17d and first and second auxiliary passages 17e, 17f.

  The oil sent out from the first or second main passages 17c, 17d is regulated in only one direction through the check valve 24, and at the same time, the oil sent out from the first or second sub passages 17e, 17f is adjusted. Through the communication passage 17g, the flow is circulated by the flow rate adjusted in advance by the flow rate adjusting valve 25.

  Further, the check valve 24 holds the float ball 24b in the adjustment chamber 24a, thereby restricting the flow of oil from the lower main passage 17d to the upper main passage 17c. When the gear 21, the shaft body 27, and the pinion 28 rotate in the direction a, braking is performed by oil flow resistance.

  Since the oil flow from the upper first main passage 17c to the lower second main passage 17d is not restricted by the check valve 24, the first gear 21, shaft 27, and pinion 28 are When rotating in the b direction, the oil flow resistance is not so much received, and the first gear 21, the shaft body 27, and the pinion 28 rotate easily without being braked in the b direction.

  Further, as shown in FIGS. 1 and 3, a closed braking rack 29 having a tooth surface facing upward is provided on the upper surface of the lower end plate portion at a location near the door tip on the lower surface portion of the inclined frame 10. The lower end engages and is attached to the formed dovetail groove 30, and the pinion 28 meshes with the closed braking rack 29 at a predetermined position before the sliding door 1 is completely closed.

  Accordingly, in a state where the pinion 28 is engaged with the closing brake rack 29, when the sliding door 1 is moved in the closing direction (direction c), the closing operation is braked because the pinion 28 rotates in the direction a. On the other hand, if the sliding door 1 is moved in the opening direction (d direction), the pinion 28 rotates in the b direction, so that the opening operation can be easily performed.

  Further, as shown in FIG. 1, an auxiliary frame 31 having an inverted L-shaped cross section is attached to the upper portion of the inclined frame 10 near the door butt, and the tooth surface of the auxiliary frame 31 faces downward. The open brake rack 32 is attached to the dovetail groove 33 formed on the lower surface of the upper end plate portion with the upper end engaged, and the pinion 28 is attached to the open brake rack 32 in a predetermined range before the sliding door 1 is completely opened. Are designed to mesh. Accordingly, in a state where the pinion 28 is engaged with the opening braking rack 32, when the sliding door 1 is moved in the opening direction (d direction), the opening operation is restricted because the pinion 28 rotates in the a direction. When trying to move the sliding door 1 in the closing direction (c direction), the pinion 28 rotates in the b direction, so that the closing operation can be easily performed.

  As shown in FIGS. 3 and 7, the closing braking rack 29 is formed of a rack member 29a near the door tip and a rack member 29b near the door bottom. The rack member 29a near the door end is made of a hard synthetic resin such as nylon resin, and the rack member 29b near the door bottom is formed of an elastic material such as urethane rubber.

  Further, as shown in FIG. 8, the open braking rack 32 is formed of a rack member 32a near the door bottom and a rack member 32b near the door tip. The rack member 32a near the door bottom is made of a hard synthetic resin such as nylon resin, and the rack member 32b near the door tip is formed of an elastic material such as urethane rubber.

  In the above configuration, when the hand is released from the opened sliding door 1, the sliding door 1 automatically closes when the doors 8 and 9 roll on the inclined rail 11 to the door end side by the weight of the sliding door 1. Then, the pinion 28 provided on the shaft body 27 of the braking device 16 meshes with the closing braking rack 29, and the closing operation of the sliding door 1 is braked.

  When the closed sliding door is manually opened, the sliding door 1 is opened by manually rolling the doors 8 and 9 on the inclined rail 11 toward the door bottom, and the shaft 27 of the braking device 16 is opened. The provided pinion 28 meshes with the opening braking rack 32 to brake the opening operation of the sliding door 1.

  In the above-described embodiment, the closing braking rack 29 and the opening braking rack 32 are formed from the rack members 29a and 29b and the rack members 32a and 32b, respectively. 32 may be formed of only the rack member 29a and the rack member 32a.

Furthermore, although the right-opening sliding door 1 is shown in the above embodiment, it is needless to say that it can be applied to a left-opening sliding door.
Further, the braking device 16 may be one utilizing oil flow resistance, one utilizing oil viscosity, one utilizing frictional resistance, one utilizing a one-way clutch, or the like.

  Furthermore, in the above-described embodiment, an example in which the sliding door 1 is automatically closed along the inclined rail 11 has been shown. However, in order to automatically close the sliding door 1, a spring spring is used. Can also be used.

  The overall configuration of the sliding door braking facility has been described above. Next, the mounting portion of the closed braking rack 29 with respect to the dovetail groove 30 will be described. First, the rack mounting portion in the first embodiment is illustrated in FIG. As shown in FIGS. 9 to 14, one end of a rack member 29 b near the door bottom is joined to one end, and the other end of the rack member 29 a near the door end is fixed as stopper means inserted from the end of the groove 30. The movement toward the door end side is stopped by the plate 36 for use. A female screw hole 36 a is formed in the plate 36, and the male screw 37 is screwed into the female screw hole 36 a and the tip of the male screw 37 is tightened while being in contact with the bottom 30 a of the groove 30. 36, the other end of the rack member 29a that is fixed to the dovetail groove 30 and inserted into the dovetail groove 30 is in contact with the flanges 30b on both sides of the upper end along the longitudinal direction of the groove 30. One end of the plate 36 comes into contact with the plate. The rack members 29a and 29b both have the same cross-sectional shape, and are provided with flanges 29d and 29e at the lower end and engaged with the flange 30b at the upper end of the groove 30 on both sides along the longitudinal direction. The tooth portions 29f and 29g at the upper end of the groove 30 protrude upward from between the flange portions 30b of the groove 30. Further, protrusions 29h and 29i are formed along the longitudinal direction on the upper surfaces of the flange portions 29d and 29e at the lower ends of the rack members 29a and 29b. One end of the plate 36 comes into contact with the flanges 29d and 29e at the lower ends of the rack members 29a and 29b as described above to stop the movement of the rack member 29a closer to the door to the other end side. On the other end side of the rack member 29b near the door bottom, a protrusion 30c is formed as a stopper means that protrudes downward from the flange 30b by striking the flange 30b of the groove 30 from above. The protrusion 30c is brought into contact with the other end of the rack member 29b near the door butt to stop the movement of the other end of the rack member 29b near the door butt. That is, the closing braking rack 29 composed of the rack member 29a near the door and the rack member 29b near the door bottom is sandwiched between the plate 36 and the protrusion 30c, and the longitudinal movement in the dovetail groove 30 is stopped. At the same time, the other end of the rack member 29b near the door bottom starts to mesh with the pinion 28 when the sliding door 1 is closed, and is pressed against the bottom 30a of the groove 30 by the caulking protrusion 30c. No rattling occurs and no impact sound is generated when the pinion 28 enters the rack member 29b. The closed braking rack 29 made of a synthetic resin material needs to be replaced due to wear or breakage. In this case, the closed braking rack 29 is closed so that the replacement work can be performed with the inclined frame 10 attached to the upper frame 2. An opening 30d is formed at the upper end of the dovetail 30 so that the rack can be pulled out at the upper end of the dovetail groove 30 at the middle portion of the mounting position of the braking rack 29 without the flange 30b at the upper end of the dovetail 30. Thus, when the closing brake rack 29 is replaced, the dead end is stopped by the protrusion 30c. Therefore, the male screw 37 is loosened and the plate 36 is moved in the groove 30 so that the entire closing brake rack 29 is moved. The other end of the rack member 29b near the door butt is moved until it is positioned at the opening 30d, and the closing braking rack 29 is worn by pulling the closing braking rack 29 obliquely upward from the opening 30d in this state. The rack 29 is removed, and the new closed braking rack is installed in the groove 30 in the reverse procedure.

  Next, the mounting portion of the closed braking rack 29 in the second embodiment will be described with reference to FIGS. 15 to 18. In this second embodiment, on the other end side of the rack member 29 a near the door. A door connected to a rack member 29a closer to the door tip is caused by abutting a protrusion 30e as a stopper means projecting downward to a flange 30b formed by caulking the flange 30b of the dovetail groove 30 from above. On the other end side of the rack member 29b near the bottom, it is formed on the protruding portion 29i on the upper surface of the flange 29e at the lower end of the rack member 29b near the door bottom, and is formed by staking the flange 30b of the groove 30 from above The projecting portion 30f that protrudes downward is brought into contact with the closing brake rack 29 so as to be slidable in the groove 30 and fixed as a stopper means inserted in the dove groove 30. Movement of the closing braking rack 29 to the door trailing end side is adapted to be stopped by the over door 38. Similarly to the first embodiment, the plate 38 is fixed to the groove 30 by tightening a male screw 39 to be screwed into the female screw hole 38a. As a result, the closing braking rack 29 composed of the rack member 29a near the door end and the rack member 29b near the door bottom is sandwiched between the plate 38 and the protrusion 30e, and the longitudinal movement in the dovetail groove 30 is prevented. The other end portion of the rack member 29b near the door bottom starts to engage with the pinion 28 when the sliding door 1 is closed, and the protrusion 30f by caulking comes into contact with the protrusion 29i. Since the movement in the direction is restricted, there is no backlash in the groove 30, and no impact sound is generated when the pinion 28 enters the rack member 29b. Further, at a position slightly deviated from the mounting position of the closing braking rack 29 to the door bottom side, the flange 30b at the upper end of the groove 30 is eliminated within a length range of about 8 cm, and the rack is pulled out at the upper end of the dove groove 30. The opening 30g is formed.

  When the closing brake rack 29 is replaced, the dead end is stopped by the protrusion 30e. Therefore, the male screw 39 is loosened and the plate 38 is moved in the groove 30 so that the entire closing brake rack 29 is moved closer to the door bottom. The rack member 29b is moved until the other end of the rack member 29b is positioned at the opening 30g, and the closing brake rack 29 is worn or damaged by pulling the closing brake rack 29 obliquely upward from the opening 30g in this state. 29 is removed, and the new closed braking rack is installed in the groove 30 in the reverse procedure.

  Next, the mounting portion of the closed braking rack 29 in the third embodiment will be described with reference to FIG. 19. In the second embodiment, the upper surface of the flange 29e at the lower end of the rack member 29b near the door bottom. The projecting portion 30 f of the projecting portion 29 i of the projecting portion 29 i that is formed by caulking by striking the flange portion 30 b of the groove 30 from above is brought into contact lightly enough that there is a closing braking rack 29 and can slide in the groove 30. However, in the third embodiment, the protrusions 29h and 29i are not formed on the upper surfaces of the flanges 29d and 29e at the lower ends of the rack members 29a and 29b near the door tips and the door bottoms, but the doors A small protrusion 29j is formed on the upper surface of the flange 29e on both sides of the lower end in the vicinity of the other end of the rack member 29b, and the protrusion 30j is formed by caulking the flange 30b of the groove 30 from above. And it is brought into contact with protrusion 30f protruding towards. Other configurations are the same as those of the second embodiment. As a result, the other end of the rack member 29b near the door bottom starts to mesh with the pinion 28 when the sliding door 1 is closed, and the protrusion 30f due to caulking comes into contact with the protrusion 29j so that the vertical movement in the groove 30 occurs. Therefore, rattling in the groove 30 is eliminated, and no impact sound is generated when the pinion 28 enters the rack member 29b.

  When replacing the closing brake rack 29, the male screw 39 is loosened and the plate 38 is moved in the groove 30 in the same manner as in the second embodiment, and the entire closing brake rack 29 is a rack member near the door bottom. The other end of 29b is moved until it is located at the opening 30g, and in this state, the closed braking rack 29 is removed by pulling the closing braking rack 29 obliquely upward from the opening 30g. The procedure for reversing the new closed braking rack is the reverse of the procedure for removing the rack, and the rack is mounted in the groove 30. In this third embodiment, when the closed braking rack 29 is pulled out when the closed braking rack 29 is replaced, the closed braking rack 29 is easily pulled out when the projection 29j is removed from the projection 30f caused by the caulking. be able to.

  Furthermore, the attachment portion of the closed braking rack 29 in the fourth embodiment will be described with reference to FIGS. 20 to 21. In the second embodiment and the third embodiment, the closed braking rack 29 is described. In order to restrict the movement of the rack member 29b near the door butt, the dovetail portion 30b of the groove 30 is squeezed from above, but in the fourth embodiment, the other end of the rack member 29b near the door butt. A recess 29k is formed in the lower end of the door to fit the tip of the fixing plate 38 that stops the movement of the closing braking rack 29 toward the door butt side, and the tip of the fixing plate 38 inserted into the dovetail groove 30 is formed. The male screw 39 for screwing the plate 38 into the female screw hole 38 a is tightened in a state in which is inserted into the recess 29 k and fixed to the groove 30. Other configurations are the same as those of the second embodiment and the third embodiment. As a result, the other end of the rack member 29b near the door bottom starts to mesh with the pinion 28 when the sliding door 1 is closed, and the leading end of the fixing plate 38 is inserted into the recess 29k. Movement is restricted, rattling in the groove 30 is eliminated, and no impact sound is generated when the pinion 28 enters the rack member 29b.

  When replacing the closing brake rack 29, the male screw 39 is loosened and the plate 38 is moved in the groove 30 in the same manner as in the second embodiment, and the entire closing brake rack 29 is a rack member near the door bottom. The other end of 29b is moved until it is located at the opening 30g, and in this state, the closed braking rack 29 is removed by pulling the closing braking rack 29 obliquely upward from the opening 30g. The procedure for reversing the new closed braking rack is the reverse of the procedure for removing the rack, and the rack is mounted in the groove 30.

  By the way, in the second to fourth embodiments described above, the protrusion 30e formed by caulking by striking the flange portion 30b of the groove 30 from above is provided on the other end side of the rack member 29a near the door. In this way, the movement of the closed braking rack 29 to the door end side is stopped, but as in the first embodiment, the fixing plate inserted in the groove 30 moves to the door end side. The movement may be stopped.

  In order to replace the rack 29, the flange 30b at the upper end of the dovetail groove 30 is eliminated within a length range of about 8 cm, and openings 30d and 30g are formed at the upper end of the dovetail groove 30 so that the rack can be removed. In addition, an opening that allows the rack to be removed may be formed in the bottom 30a of the dovetail groove 30.

Further, although the plates 36 and 38 fixed by screwing are used to stop the end of the closed braking rack 29, a plate-like plate may be used.
Further, the second to fourth embodiments described above relate to the mounting portion of the closed braking rack 29 with respect to the dovetail groove 30, but the same applies to the mounting portion of the open braking rack 32 with respect to the dovetail groove 33. It is possible to implement.

It is a front view which shows the whole structure of the sliding door apparatus in the 1st Embodiment of this invention. It is a side view which shows the principal part of the sliding door apparatus. It is a front view which shows the arrangement | positioning state of the braking device of the sliding door apparatus, a pinion, and the rack for a closed braking. It is a front view which shows the state which removed the cover body in the braking device of the sliding door apparatus. It is a rear view of the brake device. It is a top view of the brake device. It is explanatory drawing which shows the contact state of the same pinion. It is explanatory drawing which shows the arrangement | positioning state of the rack for open brakes, and the contact state of a pinion in the sliding door apparatus. It is a perspective view of a dovetail groove part state in the state where the same closed braking rack was removed. It is a perspective view which shows the state which attached the rack for the same closed braking to a dovetail groove. It is the A section expanded sectional view of FIG. It is the B section expanded sectional view of FIG. It is the C section expanded sectional view of FIG. It is a perspective view which shows the state which removes the rack for the same closed braking from a groove | channel. It is a perspective view of the dovetail groove part state in the state which removed the rack for closed braking in the 2nd Embodiment of this invention. It is a perspective view which shows the state which attached the rack for the same closed braking to a dovetail groove. It is the D section expanded sectional view of FIG. It is the E section expanded sectional view of FIG. It is a principal part expanded sectional view which shows the state which attached the rack for closed braking to the dovetail groove in the 3rd Embodiment of this invention. It is a perspective view which shows the state which attached the rack for closed braking in the dovetail groove in the 4th Embodiment of this invention. It is the F section expanded sectional view of FIG.

Explanation of symbols

1 Sliding door 8, 9 Door 11 Rail 16 Braking device 28 Pinion 29 Closed braking rack 29a Rack member 29b near the door end Rack member 29d, 29e Near the door butt 29f, 29g Teeth 29h, 29i Projection 29k Concave portion 29j Protrusion 30 Dovetail groove 30a Bottom portion 30b Protrusion portion 30c Protrusion portion 30d Opening portion 30e Protrusion portion 30f Protrusion portion 30g Opening portion 32 Opening braking rack 32a Closer door rack member 32b Closer doorside rack member 33 Dovetail groove 36 Plate 36a Female screw hole 37 Male screw 38 Plate 38a Female screw hole 39 Male screw

Claims (3)

The sliding door hung on the rail is configured to automatically close along the rail, and a pinion is provided at the upper end of the sliding door via a braking device that brakes the rotating operation in a predetermined direction compared to the rotating operation in the reverse direction. And the pinion is meshed with a rack that is close to the door tip along the rail and installed in the groove, and the pinion is rotated in the predetermined direction by meshing the rack and the pinion when the sliding door is closed. In the sliding door braking equipment configured to apply a braking force to the sliding door, an opening is formed at an intermediate portion at a rack mounting position and at the top or bottom of the groove so that the rack can be pulled out. Both ends in the longitudinal direction are stopped by stopper means, and at least one of the stopper means at both ends in the longitudinal direction is the above-mentioned stopper means. Constituted by movable plate in the groove, the braking equipment rack attachment mechanism of the sliding door, characterized in that a movable rack on the opening side by moving the plate. The sliding door hung on the rail is configured to automatically close along the rail, and a pinion is provided at the upper end of the sliding door via a braking device that brakes the rotating operation in a predetermined direction compared to the rotating operation in the reverse direction. And the pinion is meshed with a rack that is close to the door tip along the rail and installed in the groove, and the pinion is rotated in the predetermined direction by meshing the rack and the pinion when the sliding door is closed. In the sliding door braking facility configured to apply a braking force to the sliding door, an opening is formed at a position shifted from the rack mounting position toward the door bottom side so that the rack can be pulled out at the top or bottom of the groove. Both ends in the longitudinal direction are stopped by stopper means in the dovetail groove, and at least the end of the rack near the door butt among the stopper means at both ends in the longitudinal direction The abutting the stopper means is constituted by a movable plate in the located groove, the mounting of the braking equipment rack sliding doors, characterized in that a movable rack on the opening side by moving the plate mechanism. 3. The sliding door rack installation mechanism for a sliding door according to claim 1, further comprising means for pressing the end of the rack near the door bottom against the bottom of the groove .

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