JP2003314138A - Braking device for sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact device which enables a sliding door to be lightly opened from a braking state by facilitating the adjustment of a braking force. <P>SOLUTION: A braking member 10 is installed in either of the sliding door 1 and a frame body 5 into which the sliding door 1 is to be fitted; and a plate cam 20, which is to be rotated by contact and friction with the braking member 10, is installed in the other one of them in such a manner as to be urged in a direction orthogonal to the braking member 10. Just at the closing of the sliding door 1, the braking member 10 is brought into contact with a curved surface 20a of the plate cam 20, so that the plate cam 20 can brake the sliding door 1 by pushing the braking member 10 while being rotated. Just at the closing of the sliding door 1, since a radius of the plate cam 20, which is brought into contact with the braking member 10, is made longer with the rotation of the plate cam 20, the braking force is made greater with the rotation of the plate cam 20. When the sliding door 1 is separated from a door stop 7, frictional resistance is extremely low by virtue of the rotation of the plate cam 20 in a direction in which the radius of the plate 20 is made shorter. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door braking device that operates when the sliding door is closed to stop the sliding door quietly at the door stop.

[0002]

2. Description of the Related Art Conventionally, when a sliding door is closed, there are cases in which the end surface of the sliding door hits the door stop strongly and an impulsive sound is produced, or the sliding door bounces off. A braking device that operates when the sliding door is closed has been proposed.

As an example thereof, Japanese Patent Laid-Open No. 9-242415
In the gazette, a leaf spring that extends along the rail is provided at the end of a rail that is hung from the Kamoi, and the leaf spring and the guide groove of the sliding door make sliding contact at the end of closing the sliding door. There has been proposed a braking device that buffers the momentum of a sliding door by the frictional resistance of the sliding door.

This conventional braking device has a simple structure and can be provided at a low cost. However, the leaf spring is easily fatigued by use, the braking force is attenuated as the fatigue progresses, and maintenance is troublesome. is there. Further, if the braking force by the leaf spring is set to be strong, the resistance when the sliding door is opened becomes large, which is disadvantageous for children and the elderly.

Further, in Japanese Unexamined Patent Publication No. 11-44148, a pair of brake plates are arranged on the upper surface of the sliding door on the door-contact side so as to face each other along the running direction of the sliding door, and the upper frame of the sliding door frame Brake pieces inserted between the pair of brake plates are arranged on the lower surface of the contact side, and when the brake pieces are inserted in contact between the brake plates, the opposing brake plates contract and stop the sliding door. A brake device has been proposed in which the brake plate is opened when the brake piece is pulled out. Further, the brake piece in this brake device is provided with a dimension adjusting means for adjusting the dimension of the brake piece in the width direction, thereby solving the problem of maintenance of the brake device in the conventional example.

[0006]

However, in this device, since the brake piece is provided with the dimension adjusting means in the width direction of the brake piece to adjust the braking force, the structure of the brake piece becomes complicated. However, there is a drawback in that it takes time and effort to assemble it. In addition, this device
Since the contact distance between the brake plate and the brake piece is long, the dimension of the device in the longitudinal direction becomes long, and there is also a drawback that the mounting area of the device becomes large. In addition, this device
When the brake pieces are pulled out from between the brake plates, the frictional resistance at the time of initial movement in which the brake plates are in the expanded state cannot be said to be small, and there is a demand for a device that can be released more lightly.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a compact braking device in which the braking force can be easily adjusted and the sliding door can be lightly released from the braking state.

[0008]

According to the present invention, a brake member is installed on either one of a sliding door or a frame body on which the sliding door is built, and the other is rotated by contact friction with the brake member. The plate cam is installed so as to be urged in a direction orthogonal to the brake member, and when the door is closed, the brake member comes into contact with the curved surface of the plate cam, so that the plate cam rotates to move the brake member. It is characterized in that the sliding door is braked by pressing, and by adopting such a configuration, when the door is closed, the radius of the plate cam that is in contact with the brake member along with the rotation of the plate cam is large. As a result, the braking force increases with the rotation of the plate cam, and the sliding door can be stopped quietly. Further, when the sliding door is separated from the door stop, it rotates in the direction in which the radius of the plate cam in contact with the brake member becomes smaller, so that the frictional resistance is extremely small and the sliding door can be lightly released from the braking state.

A pair of plate cams are installed to face each other,
It is preferable that the pair of plate cams press the brake member while winding the brake member by contacting and inserting the brake member between the pair of plate cams. When the sliding door is pulled away from the door stop, it rotates in a direction in which the radius of the pair of plate cams contacting the brake member becomes smaller. Therefore, the brake member can be easily pulled out from between the plate cams, and the sliding door can be lightly released from the braking state.

Further, it is preferable to provide an urging force adjusting means for adjusting the urging force of the plate cam.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a sliding door braking device of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 6 show a first embodiment of a sliding door braking device according to the present invention, and a brake member fixed to the upper frame 5a side of a frame body 5 on which the sliding door 1 is built. 10 and a brake cam device 21 installed in the sliding door 1 provided with a pair of plate cams 20, 20 that rotate due to contact friction with the brake member 10.

A rail 6 having an inverted L-shaped cross section is fixed in a running groove 8 formed in the lower surface of the upper frame 5a of the frame body 5, and the brake member 10 in this embodiment is shown in FIG. As shown, it is a rectangular plate material in which a mounting slit 10a is formed, and the rail 6 is provided in the slit 10a.
Is fixed to the end of the rail 6 near the door stop 7 by inserting. The brake member 10 is made of synthetic resin, hard rubber, or the like.
It is molded using a material that easily generates frictional thrust.

The sliding door 1 is provided with a guide groove 2 into which the rail 6 is fitted and which is inserted into the upper surface of the sliding door 1.
A recess 3 opened to a and the upper surface is formed so as to communicate with the guide groove 2, and the brake cam device 21 in the present embodiment is embedded in the recess 3 of the sliding door 1.

As shown in FIGS. 2 to 4, the brake cam device 21 includes a frame 22 of the device and a plate cam 2 installed on the upper surface of a support wall 22a of the frame 22 so as to face each other.
0 and 20, and biasing force adjusting means 23 for adjusting the biasing force applied to the plate cams 20 and 20 in the inward direction.

The frame 22 includes a bottom wall 22b and both side walls 22.
c, 22c, a rear wall 22d, and the support wall 22a. The rear wall 22d is provided with a cutout groove 24 for communicating with the guide groove 2 of the sliding door 1 and for inserting the rail 6 therein. . Further, the bottom wall 22b and the support wall 22a are formed with long holes 26, 27 in the width direction of the frame 22, respectively, and the long hole 26, 27 has a shaft pin 25 for pivotally supporting the plate cam 20. Is inserted and is movable in the width direction of the frame 22.

The pair of plate cams 20 and 20 are axially supported by shaft pins 25 and 25, respectively, and are arranged so that their curved surfaces 20a face the door contact side 1a.
The rotation (outside rotation) in the opening direction is restricted. Around the shaft pin 25 on the lower surface of the plate cam 20, a torsion coil spring 28 having one end locked to the back surface of the plate cam 20 and the other end locked to the support wall 22a is arranged. 20 is a curved surface 20a due to the torsion coil spring 28.
Is urged in the direction of opening.

Therefore, when the brake member 10 is inserted between the cam plates 20 and 20 to apply a rotational pressure to the cam plates 20 and 20, the cam plates 20 and 20 resist the force of the torsion coil spring 28 and form a curved surface 20a. Rotate in the closing direction of (rotate inward). Then, when the brake member 10 comes out, the cam plates 20, 20 rotate in the opening direction of the curved surface 20a, and automatically return to the restricted position by the force of the torsion coil spring 28.

The shaft pin 25 is inserted into the shaft hole of the cam plate 20 so as to rotatably support the cam plate 20 and the long hole 26 of the support wall 22a of the frame 22 and slides. Flange portion 2 supported on the upper surface of the block 29
5b and a lower shaft portion 25c which is inserted through the shaft hole of the slide block 29 and whose lower end portion is fitted into a long hole 27 formed in the bottom wall 22b of the frame 22. It is mounted so as to be movable along the long holes 26 and 27.

The slide block 2 supporting the shaft pin 25
A bracket 30 having a key shape in a plan view is screwed to the plate 9. The bracket 30 includes screw rods 31, 31 projecting from both sides of the operation panel 32 in the urging force adjusting means 23.
And is supported by the screw rods 31 and 31 in contact with the operation panel 32.

Further, adjusting plates 33, 33 having screw holes are engraved on the screw rods 31, 31 so as to be non-rotatably and movably mounted. The adjusting plates 33, 33 and the bracket 3 are attached.
Open coil springs 34, 34 are interposed between 0 and 30.

Therefore, the pair of cam plates 20, 20 are formed by the slide blocks 29, 29 and their brackets 30, 30.
Via the open coil springs 34, 34 are urged inwardly. Therefore, the brake member 10 inserted between the cam plates 20 and 20 comes into contact with the brake member 10 while being biased in the orthogonal direction, and a braking force is generated.

When adjusting the urging force of the cam plates 20, 20, the operation panel 32 of the urging force adjusting means 23 exposed upward from the support wall 22a is turned to rotate the screw rods 31, 31 to adjust the adjusting plate. Open and close 33, 33 to open coil spring 3
The degree of compression of 4 and 34 is changed. By this operation, the spring load changes and the braking force is adjusted.

In the present embodiment configured as described above, when the brake member 10 is inserted between the pair of plate cams 20, 20 when the door is closed, the plate cams 20, 20 are brought into contact friction. Rotates inward against the force of the torsion coil spring 28, and the brake member 10 is wound while being pressed from both sides by the urging force of the opening coil spring 34.

As shown in FIG. 6, the curved surface 20a of the plate cams 20, 20 coming into contact with the brake member 10 changes as the rotation of the plate cams 20, 20 progresses, and the radius thereof increases. The braking force works strongly with the rotation of the plate cams 20, 20. Therefore, the sliding door 1 stops quietly, and the generation of impact noise and the rebound of the sliding door are prevented.

When the sliding door 1 in the braking state is separated from the door stop 7, the plate cams 20, 20 contacting the brake member 10 are rotated in the reverse direction in the direction of decreasing radius.
The resistance of the brake member 10 coming out from between the plate cams 20, 20 is extremely small, and the sliding door 1 can be lightly released from the braking state.

FIGS. 7 to 8 show an example in which the sliding door 1 to which the above braking device is applied is a sliding sliding door that is driven by a suspension vehicle 15.

A downward guide groove 2 is provided in the lower surface of the sliding door 1, and the brake cam device 21 is embedded in the lower end portion of the sliding door 1 on the door rear side. Further, the brake member 10 is
The lower frame 5b of the frame 5 is a molded product in which the brake plate 12 is provided on the mounting plate 11 so as to project, and also serves as a guide for the sliding door 1.
Is screwed to the upper surface of.

When applied to the above sliding door 1, the sliding door 1
Is guided by the brake member 10 that is fitted into the guide groove 2 of the sliding door 1, and when the door is closed, the brake cam device 21 installed at the door bottom and the brake member 10 fixed to the lower frame 5b. Come into contact with each other and brake the traveling of the sliding door 1.

9 to 11 show a second embodiment of the sliding door braking device according to the present invention. The thick plate-shaped brake member 10 having the inclined surface 13 screwed to the lower surface in the running groove 6 of the upper frame 5a is rotated by the contact friction between the brake member 10 and in the direction orthogonal to the brake member 10. The brake cam device 21 is provided with one urging plate cam 20.

Brake cam device 2 in the present embodiment
Reference numeral 1 denotes an outer case 40 which is embedded in a recess 3 which is open to the door-contact side 1a and an upper surface of a sliding door 1, and an inner case 41 which is screwed in the outer case 40 so as to be vertically adjustable.
And the curved surface 20a from the upper end opening 41a of the inner case 41.
And a cam plate 20 whose downward rotation is restricted by a restricting rod 42 provided in the inner case 41 and the cam plate 20 is rotatably supported to support both ends of the shaft pin 43 in the inner case. 42, a bracket 44 fitted in the vertically long hole 41b, a coil spring 45 for biasing the bracket 44 upward, and a bracket 45 rotatably mounted in the inner case 41.
Bell crank 4 which supports the coil spring 45 in a biased state
6 and the biasing force adjusting means 23 including an adjusting screw 47 screwed to the lower end of the bell crank 46.

When adjusting the upward biasing force of the cam plate 20, the biasing force means 2 exposed in front of the outer case 40 is used.
3 is operated with a driver, the adjusting screw 47 is turned, and the bell crank 46 is rotated around the support shaft 48 as a fulcrum to change the compression degree of the coil spring 45 and adjust the spring load.

In this embodiment, as shown in FIG. 11, when the door is closed, the inclined surface 13 of the brake member 10 is used.
And the curved surface 20a of the plate cam 20 come into contact with each other, and the plate cam 20 rotates due to contact friction. Since the radius of the plate cam 20 that is in contact with the brake member 10 increases with the rotation, the braking force works strongly with the rotation of the plate cam 20. Therefore, the sliding door 1 is braked and stops quietly.

When the sliding door 1 is separated from the door stop 7, the plate cam 20 in contact with the brake member 10 is rotated in the reverse direction in a direction in which the radius of the plate cam 20 decreases. Therefore, the initial resistance of the sliding door 1 is extremely small, and the sliding door 1 can be lightly released from the braking state. The cam plate 20 separated from the brake member 10 returns to the position of the regulating rod 42 by its own weight.

[0035]

The present invention is carried out in the form as described above, and has the following effects.

The sliding door braking device of the present invention comprises a brake member and a plate cam that is biased in a direction orthogonal to the brake member and rotates by contact friction with the brake member. As a result, the braking force is made to act strongly, so that the impact sound generated when the door is closed and the rebound of the sliding door are prevented. Also, when pulling the sliding door away from the door stop,
Since the plate cam smoothly rotates in the reverse direction and the braking force is quickly lost, the force at the initial movement of opening the sliding door can be small,
Even weak children and the elderly can open it lightly.

Further, in this braking device, since the braking portion that comes into contact with the braking member is a plate cam that rotates by contact, the dimension in the longitudinal direction of the braking device becomes short, and it can be made compact and unobtrusive. .

Further, since this braking device is provided with the urging force adjusting means of the plate cam, the braking force can be easily adjusted corresponding to the damping of the braking force.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a sliding door braking device of the present invention.

FIG. 2 is a plan view showing a brake cam device in the braking device of FIG.

3 is a vertical cross-sectional view of FIG.

4 is a cross-sectional view of FIG.

5 is an explanatory view showing a mounting position of the braking device in FIG. 1. FIG.

FIG. 6 is a view showing an operating state of the braking device of FIG. 1,
(A) is an explanatory diagram before braking, (b) is in the middle of braking, and (c) is an explanatory diagram when braking is completed.

FIG. 7 is an explanatory diagram showing an example in which the braking device of FIG. 1 is used for a sliding door.

FIG. 8 is a perspective view showing a brake member used in FIG.

FIG. 9 is a sectional view showing a second embodiment of the sliding door braking device of the present invention.

FIG. 10 is an exploded perspective view of the braking device shown in FIG.

FIG. 11 shows an operating state of the braking device of FIG.
(A) is an explanatory diagram before braking, (b) is in the middle of braking, and (c) is an explanatory diagram when braking is completed.

[Explanation of symbols]

1 sliding door, 10 brake member, 20 plate cam, 20a
Curved surface, 23 biasing force adjusting means

Claims (3)

[Claims] 1. A brake member is installed on either one of a sliding door or a frame body on which the sliding door is built, and a plate cam that rotates due to contact friction with the brake member is provided on the other of the sliding member and the brake member. It is installed so as to be biased in the orthogonal direction, and when the door is closed, the brake member comes into contact with the curved surface of the plate cam, so that the plate cam rotates to press the brake member to brake the sliding door. A braking device for a sliding door characterized by the above. 2. A pair of plate cams are installed so as to face each other, and a brake member is inserted into contact between the pair of plate cams so that the pair of plate cams press the brake member while winding it. The sliding door braking device according to claim 1. 3. The urging force adjusting means for adjusting the urging force of the plate cam is provided.
The sliding door braking device described.