JP2020041372A - Sliding door bounce prevention device - Google Patents

Abstract

To provide a sliding door bounce prevention device that can prevent a sliding door from bouncing without causing installation restrictions or a complex sliding door structure, and that has stable operation force and operability when the sliding door is opened and is superior in durability.SOLUTION: The sliding door bounce prevention device is composed of a roller assembly 10 that is attached to a sliding door panel directly or indirectly, and a roller reception tool that is fixed to a rail. The roller assembly 10 is composed of a roller support frame 11, a lock roller 12 that vertically moves together with a support shaft 16 (stepped pin in the figure), an elastic body 13, and a reaction reception member 14. The roller reception tool has sloping surfaces on both ends in the rail longitudinal direction. When the roller assembly 10 passes the set position for the roller reception tool, the lock roller 12 is pushed down on the sloping surface of the roller reception tool and rides on the roller reception tool. The lock roller 12 is locked by the roller reception tool and this prevents the lock roller 12 from moving backward.SELECTED DRAWING: Figure 2

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rebound prevention device for preventing rebound at a movement end point of a sliding door.

  Some sliding doors have a closer (also called a retracting device or a self-closing device), and some do not. The closer is activated when the door moves near the end of travel, from which it slows down the movement of the previous door and slowly moves the door to the end of travel (fully closed or fully open). Things.

  When the sliding door without the closer is vigorously hit against the door frame when closing or opening, the sliding door is rebounded from the movement end point. This tendency is particularly remarkable in sliding doors that adopt a door roller and reduce movement resistance.

  When the bouncing occurs, the fully closed state and the fully open state of the door are not maintained. Therefore, some devices for preventing the rebound of the sliding door have been proposed in the following Patent Documents 1 to 5 and the like.

  In Patent Document 1, a movable plate which is urged in one direction by a spring and which can swing around a pivot portion as a fulcrum supports a wheel of a door wheel attached to a door (sliding door), and further stops the movement of the wheel. A sliding door rebound preventing device in which a braking member is attached to a gate is shown.

  In Patent Document 2, a wheel supported by an elevating body urged in one direction by a spring, and a tray body having a recess into which the wheel falls are provided corresponding to the upper frame and the sliding door of the door frame. Sliding door lock is shown.

  Patent Document 3 discloses that a cantilevered elastic holding member having a free end, which is a cantilever support consisting of a main elastic piece and a sub elastic piece, is fixed to a door frame, and a protrusion provided on the elastic holding member is provided. A sliding door stopper is shown that is pushed away by a door roller and allows the door roller to enter a recess formed on the rear side of the protrusion.

  Patent Literature 4 discloses a sliding door movement suppressing mechanism provided with a movement suppressing means including a leaf spring having a shape similar to the elastic holding member of Patent Literature 3.

  In Patent Literature 5, a curved leaf spring is vertically provided near an end of a rail attached to a door, and when the sliding door moves to a movement end point, the leaf spring is sandwiched in a groove of a slider attached to the sliding door. A sliding door braking device is shown.

  In the rebound prevention device of Patent Literature 1, a wheel of a door roller is displaced while compressing a spring while being guided by a slope of a braking member, and gets over the braking member. Then, at the position where the sliding door hits the door stop post, the wheel returns from the displacement point by the force of the spring, whereby the wheel engages with the braking member and the movement end point on the closed side or the open side (to the fully closed position). The sliding door is held at the fully opened position.

  Further, in the sliding door locking device of Patent Document 2, the sliding door is stopped by the wheel of the door roller falling into the recess of the tray body.

  The sliding door stopper disclosed in Patent Literature 3 is configured such that, at a position where the door wheel has entered the recess, the elastic holding member elastically deformed when the protrusion is pushed out by the door wheel is restored, and the door wheel is returned to the original position by the protrusion returning to the original position. Is held.

  The movement suppressing means of the movement suppressing mechanism of Patent Document 4 is constituted by one leaf spring. Further, the direction of the free end of the movement suppressing means is opposite to that of the elastic holding member of Patent Literature 3, and a door wheel enters between the free end and the door frame, thereby preventing the sliding door from rebounding.

  In the braking device of Patent Literature 5, the curved leaf spring is sandwiched between the groove surfaces of the slider to increase the movement resistance and suppress the movement of the sliding door.

JP-A-11-287065 JP-A-07-233661 JP 09-189168 A JP-A-2015-132095 JP-A-09-242415

  The bouncing prevention device disclosed in Patent Literature 1 has a configuration in which the wheel passes over the braking member when the swing center of the movable plate moves ahead of the wheel and when the wheel moves ahead of the swing center of the movable plate. It is conceivable that the resistance at the time will be different.

  That is, as shown in FIG. 18A, when the door 30 moves in a direction in which the swing center 41 of the movable plate 40 precedes the wheels 42, the wheels 42 are pulled and the free end side of the movable plate 40 is moved. Rolling down the slope 43a of the braking member 43 while pushing down.

  On the other hand, when the wheel 42 moves ahead of the swing center 41 of the moving plate 40, as shown in FIG. 18B, the wheel 42 together with the moving plate 40 The force of the spring 44 for urging acts on the slope in the direction of rolling upward, and the force for pushing down the free end of the movable plate 40 is reduced.

  Due to the difference in this situation, the center of swing of the moving plate moves ahead of the wheel and the wheel moves ahead of the center of swing of the moving plate and the The resistance when climbing over the member increases.

  Due to this, the force applied when closing and opening the door (sliding door) and the operational feeling are different.

  In addition, in the sliding door, a lower load sliding door that guides the door roller with the rail provided on the threshold and a rail in the upper frame of the door frame, and a door roller that is guided by the rail and runs is attached to the upper part of the door. There is a type in which a door is hung by a door car and moved (a so-called hanging door).

  Among them, the latter hanging door has a large size from the swinging fulcrum of the moving plate to the supporting point of the wheel because the door bobbin for preventing rebound shown in Patent Document 1 is embedded in the door. Yes, subject to installation restrictions on dimensions.

  For this reason, there are cases in which the sliding door cannot be used, and even in the case where the sliding door can be used, it is necessary to provide the sliding door at a location different from the traveling door roller, and the structure of the sliding door becomes complicated.

  The sliding door locking device of Patent Literature 2 also supports the wheels with a swingable elevating body, so that the same problem as the rebound preventing device of Patent Literature 1 occurs.

  In the sliding door stopper and the movement suppressing mechanism described in Patent Literatures 3 and 4, an excessive force is applied to the leaf spring when the door roller enters the holding portion and escapes from the holding portion. Therefore, early fatigue / deterioration of the leaf spring due to repeated use is conceivable, and the life is likely to be shortened.

  The sliding door braking device of Patent Document 5 also adds resistance to the movement of the door by sandwiching the leaf spring while elastically deforming the leaf spring with a slider, so that early fatigue and deterioration of the leaf spring can be considered, and the service life may be shortened. high.

  The present invention can prevent the rebound of a sliding door without incurring restrictions on installation and complicating the structure of the sliding door, and has a constant operating force and operational feeling when the sliding door is closed and opened, and has excellent durability. The object of the present invention is to provide an anti-bounce device for a vehicle.

In order to solve the above-mentioned problems, the present invention provides a sliding door rebound prevention device described below.
The rebound prevention device is a device that guides a door wheel attached to a door by a rail supported by a door frame and provides the door with a sliding door that opens and closes the door, thereby preventing the door from rebounding at a movement end point.
The roller assembly includes a roller assembly that is directly or indirectly attached to the door, and a roller receiver fixed to the rail.

The roller assembly has a pair of left and right side plates arranged in parallel with a guide groove extending vertically from the lower end to the vicinity of the upper end in a position corresponding to the center of the rail in the longitudinal direction of the rail. Roller support frame consisting of a bottom plate connecting the lower end of the area excluding the part,
A locking roller that has a support shaft for vertically moving both ends into the guide groove, and is supported by the support shaft and moves up and down with the support shaft;
An elastic body for urging the locking roller upward and a reaction force receiving member supported by the side plate and receiving a reaction force of the elastic body.

The roller receiver has slopes inclined in opposite directions at both ends in the rail longitudinal direction,
When the roller assembly passes through the installation point of the roller receiver, the locking roller is pushed down by one of the slopes and rides over the roller receiver, and the locking roller is retained by the roller receiver and It is configured such that the backward movement of the locking roller is prevented.

  This rebound prevention device is provided at the upper part of the door when the sliding door for preventing rebound is an upper suspension sliding door that opens and closes the door by guiding the door roller with a rail supported by the upper frame of the door frame, The roller assembly is attached to a door unit having the door roller, and the two roller receivers are fixed to the rail.

  Further, when the sliding door for installing the device is a lower load type sliding door that opens and closes the door by guiding the door wheel attached to the lower part of the door with the first rail laid on the sill of the door frame, A roller assembly is mounted on the top of the door, and the two roller receivers are provided with a second rail supported by the upper frame of the door frame, and are fixed to the second rail.

  The elastic body is preferably a torsion coil spring. When a torsion coil spring is used as the elastic body, the locking roller is rotatably fitted to the coil portion of the torsion coil spring, and a support shaft supporting the locking roller is inserted inside the coil portion of the torsion coil spring. .

  The reaction force receiving member is formed of a pin (preferably a spring pin) whose both ends are pressed into pin holes provided in the left and right side plates, and two of the pins are viewed from the side of the side plate. In this state, both ends of the torsion coil spring are supported by the pins arranged symmetrically with respect to the guide groove.

  For an upper hanging sliding door, the roller assembly can be attached to the door bogie unit by inserting the roller supporting frame inside the door bogie supporting frame of the door bogie unit.

  The door roller unit is a combination of a door roller support frame, a door roller, and a housing incorporating a position adjustment mechanism for the door roller. The door support frame of the door unit has a U-shaped frame in front view that is constituted by left and right side plates arranged in parallel and a bottom plate connecting lower ends of the left and right side plates.

  On the outer surfaces of the left and right side plates, there are provided support shafts projecting at right angles to the longitudinal direction of the rails, and the door rollers are supported on the support shafts.

  The support shafts are provided at a total of four places on the front, rear, left and right, and therefore, there are a total of four door rollers in one door roller unit.

  The door unit is provided at the top of the door and at the top of the door, respectively. The door rebound prevention by the apparatus of the present invention can achieve the purpose of rebound prevention using only one set of roller assemblies and two roller receivers.

  It is also possible to attach a roller assembly to each of the door units on the door end side and the door end side, and simultaneously lock the locking rollers of the two roller assemblies to roller receivers provided at different locations. However, in consideration of the reduction of the movement resistance of the door, it is preferable to use a combination of one roller assembly and two roller receivers.

  The roller assembly is attached only to the door unit on the door end side, and the two roller receivers are engaged when the door is completely closed and fully opened (fully closed and fully opened). It is best practice to place each in a position where it engages and retains.

  The two roller receiving members used in the anti-bounce device of this embodiment have a bottom surface disposed between the slopes at both ends in the longitudinal direction of the rail. It is preferable to gently incline the direction in which the height is reduced on the side to be held together.

  In the apparatus for preventing the sliding door from rebounding according to the present invention, the locking roller of the roller assembly moves up and down to get over the roller receiving member.

  For this reason, there is almost no difference in resistance when the engaging roller runs over the roller receiving member in the opposite direction and gets over, and the operational feeling is similar to the force applied when the door is closed and opened.

  In addition, since the rebound preventing device of the present invention has the roller assembly attached to the door unit of the sliding door, there is no dimensional restriction on the installation and the structure of the sliding door is not complicated.

  Further, the elastic body for returning the locking roller pushed by the roller receiving member to its original position may be a torsion coil spring or a compression coil spring, which is less susceptible to fatigue and deterioration due to repeated use than a leaf spring. Life can be extended.

  Note that a torsion coil spring is used as the elastic body, and the locking roller is rotatably fitted to the coil portion of the torsion coil spring, and a support shaft supporting the locking roller is provided inside the coil portion of the torsion coil spring. The spring-back preventing device, in which both ends of the torsion coil spring are supported by pins crossed between the left and right side plates of the roller support frame, can simplify the structure as much as possible and reduce the cost.

  Further, two roller receiving members are provided at positions where the locking rollers of the roller assembly are engaged and retained when the door is fully closed and fully opened, and the bottom surfaces of the two roller receiving members are set in opposite directions. In addition, the rebound prevention device tilted in a direction in which the height dimension from the top surface to the bottom surface decreases on the side where the locking roller is retained, when the locking roller moves to the maximum height of the roller receiver, , The locking roller naturally rolls down on the sloped bottom surface.

  Therefore, the door moves toward the fully closed position or the fully open position without applying much force.

It is a front view which shows an example of use of the rebound prevention device of this invention in simplified form. It is a perspective view which shows the state before attaching the example of the roller assembly of the rebound prevention device of this invention to the door roller unit of an upper hanging sliding door. FIG. 3 is a perspective view showing a state in which the roller assembly of FIG. 2 is attached to a door unit of a suspended sliding door. FIG. 3 is an exploded perspective view of the roller assembly of FIG. FIG. 3 is a longitudinal sectional side view of the roller assembly of FIG. 2. FIG. 3 is a plan view of the roller assembly of FIG. 2. It is a side view which shows the other example of a roller assembly. FIG. 8 is a plan view of the roller assembly of FIG. 7. (A) is a top view of the torsion coil spring employ | adopted for the roller assembly, (b) is a front view of the same torsion coil spring. It is a perspective view showing the state where the door roller unit to which the roller assembly of the bounce prevention device of the present invention was attached moved to near the fully closed point of the door. It is a side view which shows the state which the locking roller of the roller assembly same as the above was pushed down to the maximum by the roller receiver of the closing side of the door fixed to the rail. It is a side view which shows the state which the locking roller of the same roller assembly moved to the fully closed position of the door over the roller receiver of the closing side of the door fixed to the rail. FIG. 13 is a perspective view showing the state of FIG. 12 as viewed obliquely from the side. It is a side view which shows the roller receiver and the positional relationship at the time of a door fully opening of the locking roller which got over the roller receiver. It is an end elevation which shows an example of the rail of an upper hanging sliding door. It is a longitudinal section showing another example of a roller assembly of a bounce prevention device of the present invention. It is a front view which shows another example of use of the rebound prevention device of this invention in simplified form. (A) is an explanatory view of the movement of the wheel when the swing center of the moving plate moves ahead of the wheel in the conventional rebound preventing device, and (b) is a diagram in which the wheel is moved in the conventional rebound preventing device. It is explanatory drawing regarding the movement of the wheel at the time of moving ahead of the rocking center of FIG.

  An embodiment of the rebound preventing device for a sliding door according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the illustrated sliding door bounce prevention device 1 is fixed to a roller assembly 10 mounted on a door unit (upper hanging unit) 31 of an upper hanging door and a rail (upper hanging rail) 37. And two roller receivers 20.

  The rail 37 is attached to the lower surface of the upper frame 38 a of the door frame 38, and the door unit 31 is suspended from the rail 37.

  As shown in detail in FIGS. 2 to 6, the roller assembly 10 includes a roller supporting frame 11, a locking roller 12 supported by the roller supporting frame 11 so as to be vertically movable, and the locking roller 12 facing upward. The elastic body 13 includes a biasing elastic body 13 and a reaction force receiving member 14 receiving a reaction force of the elastic body 13.

  The roller support frame 11 includes left and right side plates 11a arranged in parallel and a bottom plate 11b connecting lower ends of both side plates 11a. The bottom plate 11b is cut off in the longitudinal direction of the rail 37 (hereinafter simply referred to as the rail longitudinal direction), and does not exist at the center of the side plate 11a in the longitudinal direction of the rail.

  At the center of the side plate 11a of the roller support frame 11 in the rail longitudinal direction, a guide groove 15 (see FIGS. 2, 4, and 5) which is open to the lower ends of the left and right side plates 11a and extends vertically from the open ends to near the upper ends of the both side plates 11a. 5 (see FIG. 5).

  The locking roller 12 is a sleeve-shaped hollow roller, is indirectly supported by the support shaft 16, and is incorporated between the left and right side plates 11 a.

  The illustrated elastic body 13 is the torsion coil spring shown in FIG. A locking roller 12 is rotatably fitted to a coil portion 13a of the elastic body (torsion coil spring) 13, and a support shaft 16 is passed through the coil portion 13a.

  As shown in FIGS. 5 and 6, the support shaft 16 is inserted inside the coil portion 13a of the elastic body (torsion coil spring) 13, and both ends penetrating the coil portion 13a are slidable in the guide groove 15. Has been inserted.

  Therefore, when the locking roller 12 moves up and down, the coil portion 13a of the torsion coil spring moves up and down together with the support shaft 16 penetrating the hole of the locking roller 12.

  2 and 5 where the side plate 11a is viewed from the side, two reaction force receiving members 14 are arranged at symmetric positions with respect to the guide groove 15. The illustrated reaction force receiving member 14 is a spring pin, and the spring pin is press-fitted into a pin hole 11c provided in the side plate 11a and is laterally suspended between the left and right side plates 11a.

  Both ends of the elastic body (torsion coil spring) 13 are supported by the reaction force receiving member 14 as can be seen from FIGS.

  For this reason, when the coil portion 13a is pushed down, the elastic body 13 is elastically deformed to generate an elastic restoring force, and the elastic restoring force returns to the original position when the locking roller 12 stops receiving the pushing force. I do.

  The elastic body 13 is preferably an exemplary torsion coil spring in consideration of simplification and downsizing of the roller assembly 10, but is not limited to the torsion coil spring.

  A coil spring is employed in place of the torsion coil spring. As shown in FIG. 16, a retainer 17 which moves up and down together with the support shaft 16 is provided, and an elastic body is provided between the retainer 17 and the bottom plate 11b of the roller support frame 11. 13 (coil spring) is also conceivable.

  7 and 8, the reaction force receiving member 14 may be attached to the side plate 11a so as to be vertically movable.

  The roller assembly 10 shown in FIGS. 7 and 8 is provided with a vertical groove 11d which is opened at the upper edge of the side plate 11a at a symmetrical position with respect to the guide groove 15 of the side plate 11a of the roller support frame 11, and the vertical groove 11d Both ends of the reaction force receiving member 14 are inserted so as to be vertically movable.

  The reaction force receiving member 14 employed in the roller assembly 10 of FIGS. 7 and 8 is a stepped pin having a small diameter at both ends, and a portion excluding both ends having a diameter larger than the groove width of the vertical groove 11d. The stepped pin supports both ends of the elastic body 13 (the torsion coil spring in the figure).

  The roller assembly 10 shown in FIGS. 7 and 8 does not require a step of press-fitting a reaction force receiving member (spring pin) which is indispensable for the roller assembly shown in FIGS.

  The roller receiving member 20 shown in FIGS. 1 and 10 to 14 is a member having the same function as the braking member of Patent Document 1, and has slopes 20a inclined in opposite directions at both ends in the rail longitudinal direction. 20b (see FIGS. 10 to 12 and FIG. 14). Further, it has a bottom surface 20c slightly inclined with respect to the horizontal plane.

  As shown in FIG. 1, the door roller units 31 are provided at the top of the door 30 (the right side of the door in the figure) and the upper side of the door end (the left side of the door in the figure) of the door 30. As shown in FIGS. 2 and 3, the door unit 31 is configured by combining a door support frame 32, a door (wheel) 33, and a housing 34 having a built-in position adjustment mechanism for the door roller.

  The door roller support frame 32 is a U-shaped frame in front view composed of left and right side plates 32a arranged in parallel and a bottom plate 32b connecting lower ends of the left and right side plates 32a.

  The left and right side plates 32a have on their outer surfaces a support shaft 35 projecting at right angles to the longitudinal direction of the rail 37 (see FIGS. 1 and 10 to 15), and the door shaft 33 is supported on the support shaft 35. ing. Two support shafts 35 are provided before and after each of the left and right side plates 32a, and therefore, there are a total of four door rollers 33 in one door roller unit 31.

  As shown in detail in FIG. 15, the rail 37 includes left and right side walls 37a, a top wall 37b connecting the left and right side walls 37a, an inwardly extending portion 37c provided at a lower end of the left and right side walls 37a, and It is a rail with a downward opening composed of a rail 37d provided at the protruding end of the overhang portion 37c, and the door wheel 33 runs on the rail 37d.

  The illustrated rail 37d is a ridge, but when the rolling surface of the door wheel 33 is a convex arc, a concave arc groove for receiving the convex arc rolling surface is provided.

  As shown in FIGS. 2 and 3, the roller assembly 10 fits the roller support frame 11 inside a door roller support frame 32 provided in the door roller unit 31 on the door end side, and attaches the bottom plate 11 b to the bottom plate 32 b of the door roller support frame 32. And fixed on the door unit 31 by fastening screws Fs.

  As shown in FIG. 1, two roller receivers 20 are provided inside the rail 37 at different positions.

  One of the two roller receiving members 20 is located at a position where the locking roller 12 of the roller assembly 10 is engaged and retained when the door 30 is completely closed (in FIG. 1, near the right end of the upper frame 38a). Installed in

  The other is installed at a position where the locking roller 12 of the roller assembly 10 is engaged and retained when the door 30 is fully opened (in FIG. 1, near the middle point of the upper frame 38a).

  As can be seen from FIGS. 11 and 14, the directions of inclination of the bottom surface 20c of the two roller receiving members 20 are opposite to each other, and the height is on the side where the locking roller 12 is engaged and retained. It is in a decreasing direction.

  The inclination angle of the bottom surface 20c is extremely small. For example, it is set to 5 ° or less. The inclination angle may be about 2 to 3 °.

  The two roller receivers 20 have the same shape and the same size and are mounted in opposite directions. For this reason, the resistance when the door 30 moves in the closing direction and the locking roller 12 gets over the roller receiving member 20 and the resistance when the door 30 moves in the opening direction and the locking roller 12 gets over the roller receiving member 20. The resistances are substantially equal, and the force applied when closing and opening the door and the operational feeling are stable with little difference.

  In the illustrated anti-rebound device 1, the locking roller 12 of the roller assembly 10 contacts the slope 20 a of the roller receiver 20 mounted near the door-side end of the rail 37 immediately before the door 30 is completely closed. As shown in FIG. 11, the elastic body 13 is elastically deformed and pushed down to the maximum height of the roller receiving member 20 (the part where the bottom surface 20c projects maximum downward).

  The locking roller 12 that has moved to this position rolls down on the bottom surface 20c because the bottom surface 20c of the roller receiver 20 is inclined.

  Then, when the vehicle has moved onto the slope 20b, it is pushed upward by the elastic restoring force of the elastic body 13, and engages with the slope 20b at the position where the door 30 is completely closed as shown in FIG. The engagement prevents the backward movement of the locking roller 12, thereby preventing the door 30 from rebounding at the fully closed position.

  When the door 30 is opened, the same operation as when the door 30 is closed prevents the door 30 from rebounding. FIG. 14 shows the engagement state of the locking roller 12 with the roller receiver 20 when the door 30 is fully opened.

  When the door 30 is completely closed, the locking roller 12 is engaged with the roller receiver 20 on the right side in FIG. 1, and when the door 30 is fully opened, it is engaged with the roller receiver 20 on the left side in FIG.

  The illustrated anti-bounce device 1 has a simple and compact structure, and can be easily added to an existing upper hanging door.

  In addition, the urging of the locking roller 12 can be performed by using the elastic body 13 formed of a wire material, and an unreasonable load is not applied to the elastic body 13 due to the displacement of the locking roller 12, so that the life is excellent and the life is long. It is possible to provide something that withstands the use of

  As shown in FIG. 17, the bouncing prevention device according to the present invention has a lower load in which a door roller 33A is attached to a lower portion of a door 30, and the door roller 33A rolls on a first rail 39a laid on a threshold. It can be used for sliding doors.

  For the lower load type sliding door, the roller assembly 10A is preferably mounted on the upper part of the door 30 in a state of being embedded, and further, the grooved locking roller fits on the lower surface of the upper frame 38a of the door frame 38 and rolls. The second rail 39b is provided, and the two roller receiving members 20A on which the grooved locking rollers roll and ride over are fixed to the second rail 39b.

  The roller assembly 10A is preferably one in which the locking roller 12 of the roller assembly 10 described above is replaced with a locking roller with a groove. The roller receiving member 20A is preferably formed such that the inclined surface and the bottom surface of the above-described roller receiving member 20 have convex arc surfaces on which the grooved locking rollers fit.

DESCRIPTION OF SYMBOLS 1 Sliding door rebound prevention device 10, 10A Roller assembly 11 Roller support frame 11a Side plate 11b Bottom plate 11c Pin hole 11d Vertical groove 12 Locking roller 13 Elastic body 13a Coil portion 14 Reaction force receiving member 15 Guide groove 16 Support shaft 17 Retainer 20, 20A Roller receivers 20a, 20b Slope 20c at both ends Bottom 30 Door 31 Door unit 32 Door support frame 32a Side plate 32b Bottom plate 33, 33A Door 34 Housing 35 Support shaft 37 Rail 37a Side wall 37b Top wall 37c Inward extension 37d Rail 38 door Frame 38a Upper frame 39a First rail 39b Second rail 40 Moving plate 41 Center of swing 42 Wheel 43 Braking member 43a Slope 44 Spring Fs Fastening screw

Claims (6)

A door wheel (33) attached to the door (30) is guided by a rail (37) supported by a door frame (38) and provided on a sliding door that opens and closes the door (30) to prevent the sliding door from rebounding at the end point of movement. A device,
A roller assembly (10) attached directly or indirectly to said door (30), and two roller receivers (20) fixed to a rail (37);
The roller assembly (10) includes a left and right side plate (11a) having a parallel arrangement in which a guide groove (15) extending vertically from the lower end to the vicinity of the upper end is provided at a central portion in the rail longitudinal direction so as to correspond to the position. A roller support frame (11) including a bottom plate (11b) connecting lower ends of regions of the left and right side plates (11a) except for a central portion in a rail longitudinal direction;
A locking roller (12) having a support shaft (16) for vertically moving both ends thereof into the guide groove (15), supported by the support shaft (16) and moving up and down together with the support shaft (16); ,
An elastic body (13) for urging the locking roller (12) upward;
A reaction force receiving member (14) supported by the side plate (11a) and receiving a reaction force of the elastic body (13);
The two roller receivers (20) have slopes (20a, 20b) inclined in opposite directions at both ends in the rail longitudinal direction,
When the roller assembly (10) passes through the installation point of the roller receiver (20), the locking roller (12) is pushed down by one of the slopes (20a, 20b) and the roller receiver (20) is pushed down. And the locking roller (12) is retained by the roller receiving member (20) to prevent the locking roller (12) from moving backward. The sliding door is an upper-hanging sliding door that opens and closes a door (30) by guiding a door roller (33) by a rail (37) supported by an upper frame (38a) of a door frame (38),
The roller assembly (10) is attached to a door unit (31) having the door roller (33) provided above the door (30), and the two roller receivers (20) are attached to the rail (37). 2. The apparatus according to claim 1, which is fixed to the sliding door.   3. The roller assembly (10) according to claim 2, wherein the roller assembly (10) is attached to the door roller unit (31) by inserting the roller support frame (11) inside a door roller support frame (32) of the door roller unit (31). The sliding door bounce prevention device described in the above. The sliding door is a lower-load type sliding door that opens and closes a door (30) by guiding a door roller attached to a lower part of a door (30) by a first rail (39a) laid on a sill of a door frame (38). Yes,
A second rail in which the roller assembly (10A) is mounted on top of the door (30) and the two roller receivers (20A) are supported by an upper frame (38a) of the door frame (38). 2. The sliding door rebound prevention device according to claim 1, further comprising: a first door provided on the second rail, the second door being fixed to the second rail. The elastic body (13) is a torsion coil spring, and the locking roller (12) is rotatably fitted to the coil portion (13a) of the torsion coil spring, and a spindle supporting the locking roller (12). (16) is inserted inside the coil portion (13a) of the torsion coil spring,
The reaction force receiving member (14) is constituted by pins whose both ends are pressed into pin holes (11c) provided in the left and right side plates (11a),
Two of the pins are arranged symmetrically with respect to the guide groove (15) in a state where the side plate (11a) is viewed from the side, and both ends of the torsion coil spring are supported by the pins. The rebound prevention device for a sliding door according to any one of claims 1 to 4.   The two roller receivers (20) have a bottom surface (20c) disposed between slopes (20a, 20b) at both ends in the rail longitudinal direction, and the bottom surface (20c) of the two roller receivers (20). Sliding door according to any of the preceding claims, wherein 20c) is gently inclined in opposite directions and in a direction in which the height decreases on the side where the locking roller (12) is engaged and retained. Anti-bounce device.

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