JP2001336346A - Automatic closing device for sliding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic closing device for a sliding door capable of efficiently adjusting a cummulative amount of repulsive force without taking any labor or time. SOLUTION: The automatic closing device body 20 mounted to the sliding door 1 includes a repulsive force accumulating means 24 for accumulating repulsive force in the opposite direction with the movement of the sliding door 1 in the opening direction and an adjusting means 25 for adjusting a cummulative amount of the repulsive force, and a locking means 51 making locking operation for preventing the decrease of the repulsive force of the repulsive force accumulating means 24 by locking with a driving gear 29 engaging with the repulsive force accumulating means 24 is provided to the automatic closing device body 20, and a lock releasing means 22 for releasing the locking operation by coming into contact with the locking means 51 is mounted to the sliding door 1 side when the automatic closing device body 20 is mounted to the sliding door 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door self-closing device configured to automatically perform a closing operation of a sliding door.

[0002]

2. Description of the Related Art As a self-closing type sliding door apparatus for automatically closing a sliding door, the present inventor has devised one as shown in FIGS.

[0003] In FIG. 13, reference numeral 1 denotes a sliding door of a hanging type;
Numerals indicate openings, which are opened and closed by the sliding door 1, 3, 4 and 5, which are an upper frame, a door frame and a door frame fixed at positions around the opening. A guide rail 6 is attached along the lower surface of the upper frame 3 so as to extend in the lateral direction, and a guide roller 7 for supporting the sliding door 1 is provided on a rail portion 6a of the guide rail 6 at a position close to the door end. It is slidably contacted with the butt side so as to freely roll.

A substantially L-shaped support bracket 11 for supporting the guide roller 7 on the door tip side is built in an upper end portion of the sliding door 1 on the door tip side. That is, FIG.
As shown in FIG. 15A and FIG. 15, a bracket recess 12 is formed in the upper end corner of the sliding door 1 on the door top side. Be stopped. Support bracket 1
A support shaft 14 is erected on the upper side 1 in a state where the position can be adjusted by a nut 13, and a guide roller 7 on a door end side is supported by a support rod 15 protruding laterally from an upper end of the support shaft 14. It is rotatably supported. In addition, the arrangement | positioning location of this support bracket 11 grade | etc., Is covered with the cover 16 for blindfolds, and is provided so that it may not be seen from the front and back side of the sliding door 1. FIG.

As shown in FIGS. 14B, 16 and 17, a self-closing device main body 20 for automatically performing the closing operation of the sliding door 1 is built in the upper end of the sliding door 1 on the side of the door end. After the assembly, the location of the self-closing device main body 20 and the like is provided so as not to be seen from the front and back sides of the sliding door 1.

That is, as shown in FIG. 16 and the like, a main body recess 21 for accommodating the self-closing device main body 20 is formed at the upper end corner of the sliding door 1 on the door end side. And
A longitudinally extending portion 22 a of a substantially L-shaped mounting bracket 22 is fixed to a rear wall surface of the main body concave portion 21 with a screw 36. Further, an outer shell of the self-closing device main body 20 is formed between a laterally extending portion 22b extending laterally from the lower end of the vertically extending portion 22a toward the door butt side and a bottom surface of the main body concave portion 21. The self-closing device main body 20 is accommodated in the main body concave portion 21 with the bottom surface portion 23d of the box-shaped accommodation case 23 held therebetween.

As shown in FIG. 18 and FIG. 19, the self-closing device main body 20 is disposed in an upright posture at a storage case 23 and at a position near the door end in the storage case 23, and is provided by a repulsive force due to unwinding. A spiral spring 24 as a repulsive force accumulating means for performing a closing operation of the sliding door, a central end of the spiral spring 24 is locked, and one side end surface thereof is exposed so as to face outside from the storage case 23. And a pair of leaf springs 27 that elastically clamp a hex nut 26 attached to the shaft 25 from above and below to regulate the position of the shaft 25. And a spiral spring case 2 in which the outer peripheral end of the spiral spring 24 is locked.
8, a driving gear 29 as a driving wheel body which is fitted to the spiral spring case 28 and has an upper part protruding above the housing case 23, and is disposed at a position near the door in the housing case 23, An oil damper 30 as a braking means for exerting a braking function only in a predetermined rotation direction and braking the closing operation when the sliding door 1 is moved in the closing direction, and is externally fitted to the oil damper 30 and driven. Gear 31 as a braking wheel, which is arranged to mesh with the gear 29, and an upper extension 2 extending upward from the housing case 23.
3a, and a support rod 32 rotatably supporting the guide roller 7 on the door bottom side. And
In the guide rail 6, a rack 33 that meshes with the driving gear 29 corresponding to a range in which the driving gear 29 moves with the sliding door 1 in a state where the self-closing device main body 20 is assembled to the sliding door 1. Is attached.

In the bottom of the housing case 23 on the side of the door,
A hole 23b through which the laterally extending portion 22b of the mounting bracket 22 is inserted is formed, and the side of the door end of the storage case 23 is extended downward.
The sliding door 1 is stopped by the screw 37 at the lower extension 23c.

As shown in FIG. 19, an end face of the shaft body 25 exposed to the outside from the housing case 23 is provided with:
An adjusting operation section 25a such as a groove is formed so that it can be easily rotated by a jig such as a flathead screwdriver. The shaft body 25 can be rotated by engaging the tip of a jig such as a flathead screwdriver with the adjusting operation section 25a. I can do it. Further, a screw hole 23f into which the rotation preventing screw 35 can be screwed is formed at a substantially central position on the side surface of the door end of the housing case 23.

In the above configuration, when the sliding door 1 is opened, the driving gear 29 meshed with the rack 33 rotates,
A repulsive force due to the unwinding force is accumulated in the spiral spring 24.
Therefore, when the hand is released from the sliding door 1, the spiral spring 24
The driving gear 29 presses against the rack 33 to the side of the door due to the repulsion force, and the sliding door 1 automatically closes by the reaction force. At this time, the closing operation of the sliding door 1 is performed while being braked by the oil damper 30 via the braking gear 31 meshed with the driving gear 29, and the sliding door 1 is slowly closed at a substantially constant speed. Therefore, it is possible to reliably prevent the sliding door 1 and the door frame 4 from being damaged or generating noise when the sliding door 1 is closed. When the sliding door 1 is opened, the oil damper 30 is rotated in a direction that does not generate a braking force. Therefore, when the sliding door 1 is opened, the opening operation can be performed with a small force.

When assembling the self-closing device body 20 to the sliding door 1, the mounting bracket 22 is attached to the sliding door 1 in advance, and the rotation preventing screw 35 is screwed into the housing case 23 to rotate the driving gear 29. After the state becomes impossible, the amount of repulsive force accumulated in the spiral spring 24 is adjusted with a jig such as a flathead screwdriver. Thereafter, with the self-closing device main body 20 along the guide rail 6 and the rack 33, the self-closing device main body 20 is moved to the main body while the sliding door 1 is moved so that the self-closing device main body 20 enters the main body concave portion 21. Push it into the recess 21. At this time, when the self-closing device main body 20 is pushed halfway into the main body concave portion 21, the housing case 2
3 is sandwiched between the laterally extending portion 22b of the mounting bracket 22 and the bottom surface of the main body concave portion 21, so that the self-closing device main body 20 is supported by the sliding door 1 even when the hand is released. Thus, the pushing operation can be performed relatively easily. Thereafter, the self-closing device main body 20 is completely pushed into the main body concave portion 21 to fix the screw 37 to the sliding door 1 and remove the rotation preventing screw 35 to remove the driving gear 29.
Becomes rotatable so that the closing operation of the sliding door 1 can be performed.

As described above, when the self-closing device main body 20 is completely pushed into and built into the main body concave portion 21, only the arrangement space for the sliding door 1 is required, and the self-closing device main body 20 cannot be seen from the outside. The appearance is good.

When adjusting the amount of repulsive force accumulated in the spiral spring 24 at the time of maintenance or the like, after removing the screw 37 attached to the lower extension 23c of the housing case 23, the shaft of the self-closing device main body 20 is removed. The self-closing device body 20 is exposed so that the body 25 is exposed.
The sliding door 1 is moved with respect to
5, the force from the self-closing device body 20 is applied to the rack 3
3 to prevent the sliding door 1 from moving, and then adjust the amount of repulsive force accumulated in the spiral spring 24 with a jig such as a flathead screwdriver.

[0014]

However, FIG.
19, when adjusting the amount of repulsive force accumulated in the spiral spring 24, including when the self-closing device main body 20 is assembled, the screwing work and the removing work of the rotation preventing screw 35 are performed. Since it is necessary, much labor and time are required, and the workability may be reduced.

Further, when the sliding door 1 is used, the rotation preventing screw 35 is unnecessary, so that it must be stored in a separately determined place. However, after the sliding door 1 has been used for a long period of time, the repulsive force is accumulated again. When trying to adjust the amount,
In some cases, the storage location of the rotation preventing screw 35 is lost, or the rotation preventing screw 35 is lost, so that the amount of repulsive force accumulation cannot be adjusted.

An object of the present invention is to provide a self-closing device for a sliding door that can efficiently adjust the amount of repulsive force accumulated without taking much trouble and time. Things.

[0017]

According to a first aspect of the present invention, there is provided a repulsive force accumulating means for accumulating a repulsive force in a reverse direction as a sliding door moves in an opening direction; A self-closing device for the sliding door, wherein the self-closing device main body is provided with an adjusting means for adjusting the force accumulation amount, and the sliding door is automatically closed by the repulsive force accumulated when the sliding door is opened. A locking means is provided in the body of the self-closing device for performing a locking operation for preventing a decrease in the repulsive force of the repulsive force accumulating means by engaging a component interlocking with the force accumulating means, and is detachable from the self-closing device main body. And a lock release means for contacting the lock means when mounted on the self-closing device body and releasing the lock operation. The self-closing device main body may be attached to the sliding door, but may be attached to a frame facing the opening that is opened and closed by the sliding door or a portion in the vicinity thereof.

According to this structure, the lock release means is detached from the main body of the self-closing device, so that the locking operation of the lock means prevents the reduction of the repulsive force of the repulsive force accumulating means. Can be adjusted freely. On the other hand, when the unlocking means is attached to the main body of the self-closing device, the unlocking means contacts the locking means and the locking action by the locking means is released.

According to a second aspect of the present invention, in the self-closing device for a sliding door according to the first aspect, the main body of the self-closing device is mounted in the sliding door. The invention according to claim 3 is
The self-closing device for a sliding door according to claim 2, wherein the unlocking means is attached to the sliding door, and when the self-closing device main body is built in the sliding door, the unlocking means comes into contact with the locking means to perform the unlocking operation. On the other hand, when the self-closing device main body is outside the predetermined accommodation position of the sliding door, the locking state of the locking means is maintained.

According to this configuration, while the self-closing device main body can be freely adjusted by the adjusting means while the self-closing device main body is taken out of the sliding door, the self-closing device main body is built in the sliding door. By simply pushing the lock, the unlocking operation is performed by the unlocking means, and the self-closing operation function can be sufficiently exhibited.

According to a fourth aspect of the present invention, in the self-closing device for a sliding door according to any one of the first to third aspects, a spiral spring is used as the repulsive force accumulating means, and the spiral spring rotates by the repulsive force. A driving wheel to be driven and braking means for braking the movement of the sliding door in the closing direction as compared with the movement of the sliding door in the opening direction are provided in the self-closing device main body, and the locking means is a lock releasing means. In a state in which the driving wheel is not in contact with the driving wheel, the driving wheel or the braking wheel interlocked with the driving wheel is engaged by the biasing force to prevent rotation of the driving wheel. is there.

According to this configuration, the self-closing device main body can be realized with a relatively simple configuration, and the self-closing device main body can be satisfactorily built in the sliding door. According to a fifth aspect of the present invention, in the self-closing device for a sliding door according to any one of the first to fourth aspects, when the self-closing device main body is mounted, the self-closing device main body is placed substantially horizontally in the sliding door. This is a mounting bracket for holding the self-closing device main body while guiding it in the direction and preventing the self-closing device main body from moving up and down.

According to this configuration, since the mounting bracket for mounting the self-closing device main body is also used as the unlocking means, the mounting bracket and the unlocking means are provided separately from each other. The number of parts can be reduced.

According to a sixth aspect of the present invention, in the self-closing device for a sliding door according to the fifth aspect, the locking means comprises a leaf spring. According to this configuration, the number of components can be reduced as compared with a case where the urging means for urging the locking means is separately provided.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. Note that components having substantially the same functions as those of the sliding door self-closing device shown in FIGS. 13 to 19 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 1 and 2, the self-closing device for the sliding door 1 is not provided with a rotation preventing screw 35 or a screw hole for screwing the screw. Locking means for preventing the reduction of the repulsive force of the spiral spring 24 by engaging with a driving gear 29 as a driving wheel which is interlocked with the spiral spring 24 as a repulsive force accumulating means on the self-closing device body 20 attached to the Block body 51 as
A compression spring 52 and a slide plate 53 are provided. The slide plate 53 is slidably disposed in the lateral direction on the bottom surface of the storage case 23, and comes into contact with the distal end of the mounting bracket 22 when the self-closing device main body 20 is mounted in the main body concave portion 21. As shown in FIG. 1, the block body 51 is moved to a position where the block body 51 is separated from the driving gear 29. On the other hand, the compression spring 52 is
1 is urged in a direction to be engaged with the driving gear 29,
When the self-closing device main body 20 is taken out from the main body concave portion 21, or as shown in FIG.
When the block body 51 is pulled out from the predetermined storage position, the block body 51 is engaged with the driving gear 29.

In this configuration, when the self-closing device main body 20 is removed from the sliding door 1 or pulled out slightly from the main body concave portion 21, the block body 51 is engaged with the driving gear 29, and the driving gear 29 and the spiral spring 24 is locked,
As a result, a reduction in the repulsive force of the spiral spring 24 as the repulsive force accumulating means is prevented. Further, in this state, the sliding door 1 is relatively moved with respect to the self-closing device main body 20 so that the shaft body 25 as the adjusting means is exposed to the outside. Can be adjusted freely. On the other hand, the self-closing device main body 20 is
, The block body 51 is pushed into the door top side via the slide plate 53 by the mounting bracket 22 as an unlocking means.
1 is separated from the driving gear 29, and the self-closing operation is performed satisfactorily.

As described above, by merely attaching the self-closing device main body 20 to the sliding door 1 or pulling it out of the sliding door 1, the unlocking operation for the driving gear 29 (that is, the spiral movement) is performed in conjunction with this operation. Since the self-closing force exerting operation of the sliding door 1 by the repulsive force of the spring 24) and the locking operation to the driving gear 29 (the self-closing force inhibiting operation of the sliding door 1 by the repulsive force of the spiral spring 24) are automatically performed, This eliminates the need for the conventional operation of the rotation preventing screw, thereby improving the work efficiency when adjusting the amount of accumulated repulsive force. In addition, since the rotation prevention screw is not required, the storage location of the rotation prevention screw is lost or the rotation prevention screw is lost, so that it is impossible to adjust the repulsive force accumulation amount as in the related art. Nothing.

A relatively simple structure in which a block 51 as a locking means, a compression spring 52 and a slide plate 53 are added to the structure shown in FIG. 19 (however, the rotation preventing screw 35 and the screw hole are not provided). The self-closing device main body 20 can be realized with a simple configuration, and the self-closing device main body 20 can be satisfactorily built in the sliding door 1, so that the self-closing device main body 20 cannot be seen from the outside and the appearance is improved.

Further, since the mounting bracket 22 for mounting the self-closing device main body 20 is also used as the unlocking means, the mounting bracket 22 and the unlocking means are provided separately from each other. The number of parts can be reduced, and the manufacturing cost can be reduced.

FIGS. 3 and 4 show a self-closing device for a sliding door according to a second embodiment of the present invention. In this embodiment, the locking means comprises a driving gear 29 and a braking gear 31. Is supported by a support shaft (not shown) or the like so as to be swingable, and one end 55a of which is bent upward. And a helical spring 56 biased to engage the gear 31. The other end 55b of the engagement lever 55 is swelled downward, and is capable of abutting on the laterally extending portion 22b of the mounting bracket 22 used as the unlocking means.

In this configuration, when the self-closing device main body 20 is removed from the sliding door 1 or pulled out slightly from the main body concave portion 21, the engaging lever 55 engages with the braking gear 31 interlocked with the driving gear 29. Thus, the driving gear 29 and the spiral spring 24 are locked. In particular, as shown in FIG. 3, with the self-closing device main body 20 pulled out from the main body concave portion 21 so that the shaft body 25 as the adjusting means is exposed to the outside, the engagement lever 55 is moved to the braking gear 31. The locking operation is performed by engaging with the shaft member 25. Therefore, when the shaft body 25 is visible to the outside, the adjustment of the repulsive force accumulation amount can be performed freely and reliably without being conscious, and the operability is improved. Is good.

From this state, as shown in FIG.
When the self-closing device main body 20 is completely pushed into the predetermined storage position of the main body concave portion 21, the laterally extending portion 22b of the mounting bracket 22 abuts on the other end 55b of the engaging lever 55, and one end of the engaging lever 55 55a is released from the braking gear 31 and unlocked, and as a result, the self-closing device main body 20 is in a state where the self-closing operation is performed well.

Also in this embodiment, the self-closing device main body 20 is simply attached to the sliding door 1 or pulled out from the sliding door 1, and the unlocking operation and the locking operation are automatically performed in conjunction with this operation. Therefore, the operation of the rotation prevention screw as in the related art is not required, and the work efficiency when adjusting the amount of repulsive force accumulation is improved. In addition, since the rotation preventing screw is not required, the loss of the rotation preventing screw does not make it impossible to adjust the amount of repulsive force accumulation. Also, the one shown in FIG.
Self-closing device body 20 can be realized with a relatively simple configuration in which an engagement lever 55 and a helical spring 56 as locking means are added to the self-closing device main body 20.
Since the self-closing device main body 20 can be satisfactorily built in the sliding door 1, the self-closing device main body 20 cannot be seen from the outside, and the appearance is improved. Further, since the mounting bracket 22 for mounting the self-closing device main body 20 is also used as the unlocking means, the number of parts is reduced as compared with a case where the mounting bracket 22 and the unlocking means are separately provided. And the manufacturing cost can be reduced.

FIGS. 5 to 8 show a self-closing device for a sliding door according to a third embodiment of the present invention. And a leaf spring 57 arranged to be able to move up and down along. As shown in FIG. 7, a bent portion 57a and a projecting engagement portion 57b are formed on the upper portion of the leaf spring 57. Above the place where the leaf spring 57 is provided, A regulating rib 23f that regulates the upper end from moving upward is attached to the housing case 23. Further, a tapered surface 57c is formed at the lower end of the leaf spring 57. As shown in FIG. 8, a portion corresponding to the tapered surface 57c in the laterally extending portion 22b of the mounting bracket 22 is located on the distal end side (close to the door end). Side) is notched, while the base (closer to the door) 22d protrudes upward.

In this configuration, when the self-closing device main body 20 is removed from the sliding door 1 or pulled out slightly from the main body concave portion 21, the projecting engagement portion 57b of the leaf spring 57 is moved to the driving gear as shown in FIG. Braking gear 3 linked to 29
1 and the drive gear 29 and the spiral spring 24 are locked. In particular, as shown in FIG. 5, the self-closing device main body 20 is moved so that the shaft 25 as the adjusting means is exposed to the outside.
Is pulled out from the main body concave portion 21, the projecting engagement portion 57b of the leaf spring 57 engages with the braking gear 31 to perform a locking operation. Also, the adjustment of the amount of repulsive force can be freely and reliably adjusted without being conscious of the dimensions of the self-closing device main body 20, and the operability is improved.

From this state, as shown in FIG.
When the self-closing device main body 20 is completely pushed into the predetermined storage position of the main body concave portion 21, the laterally extending portion 22 of the mounting bracket 22 is
b, the projecting engagement portion 57 of the leaf spring 57 at the base portion 22d.
b, etc., are pushed up, and the protruding engagement portion 57b is disengaged from the braking gear 31, and as a result, the self-closing device main body 20 is in a state in which the self-closing operation is favorably performed.

Also in this embodiment, the one shown in FIG. 19 (however, it does not have the rotation preventing screw 35 or the screw hole)
In addition, a leaf spring 57 as a locking means is added to the self-closing device main body 20 with a relatively simple configuration in which the shape of the mounting bracket 22 and the structure for mounting the leaf spring 57 in the storage case 23 are slightly changed. Since the self-closing device main body 20 can be satisfactorily built in the sliding door 1, the self-closing device main body 20 cannot be seen from the outside, and the appearance is improved. In addition, since the rotation preventing screw is not required, the loss of the rotation preventing screw does not make it impossible to adjust the amount of repulsive force accumulation. In addition, since the locking means is constituted only by the leaf spring 57, the number of parts can be reduced and the manufacturing cost can be reduced. Further, similarly to the above embodiment, since the mounting bracket 22 for mounting the self-closing device main body 20 is also used as the lock releasing means, the mounting bracket 22 and the lock releasing means are separately provided. The number of parts can be reduced, and the manufacturing cost can be reduced.

FIGS. 9 to 12 show a sliding door self-closing device according to a fourth embodiment of the present invention. In this embodiment, a locking means is fixed to the upper side of the oil damper 30. And a leaf spring 60 fastened together by a nut 30a. As shown in FIG. 11, the leaf spring 60 has a projection 60a projecting along the thickness direction of the teeth of the braking gear 31 formed at a lower portion thereof. Horizontal extension part 2
A contact surface 60b that can be freely contacted is formed on 2b. In a mounted state where no external force is applied, the leaf spring 60 is formed such that its lower side approaches the braking gear 31 due to its elasticity. As shown in FIG. 12, one side (leaf spring 60) on the tip side (closer to the door end) is provided on the laterally extending portion 22b of the mounting bracket 22 used as the unlocking means.
The notched side is notched, and a tapered portion 22g is formed at a position following the notched portion 22f.

In this configuration, when the self-closing device main body 20 is removed from the sliding door 1 or pulled out a little from the main body concave portion 21, the lower side of the leaf spring 60 is elastically moved to the braking gear 31 side as shown in FIG. Projecting into the projection 6
Oa is engaged with the braking gear 31 interlocked with the driving gear 29 to lock the driving gear 29 and the spiral spring 24.
In particular, in a state where the self-closing device main body 20 is pulled out from the main body concave portion 21 so that the shaft body 25 as the adjusting means is exposed to the outside, the projection 60a of the leaf spring 60 engages with the braking gear 31. Since the locking operation is performed by the operator, when the shaft body 25 is visible to the outside, the adjustment of the repulsive force accumulation amount can be freely and reliably performed without being conscious, and the operability is improved. .

In this state, as shown in FIG. 10, when the self-closing device main body 20 is completely pushed into the predetermined storage position of the main body concave portion 21, the contact surface 60b of the leaf spring 60 becomes tapered of the mounting bracket 22. The protruding portion 60a of the leaf spring 60 is released from the braking gear 31 by being gradually pushed by the portion 22g, and as a result, the self-closing device main body 20 is in a state where the self-closing operation is performed well.

Also in this embodiment, the one shown in FIG. 19 (however, it does not have the rotation preventing screw 35 or the screw hole)
The self-closing device main body 20 can be realized with a relatively simple configuration in which a leaf spring 60 as a locking means is added and the shape of the mounting bracket 22 is slightly changed, and the self-closing device main body 20 is attached to the sliding door 1. Since the self-closing device main body 20 cannot be seen from the outside, the appearance can be improved. In addition, since the rotation preventing screw is not required, the loss of the rotation preventing screw does not make it impossible to adjust the amount of repulsive force accumulation. In addition, since the locking means is constituted only by the leaf spring 60, the number of parts can be reduced and the manufacturing cost can be reduced. Further, similarly to the above embodiment, since the mounting bracket 22 for mounting the self-closing device main body 20 is also used as the lock releasing means, the mounting bracket 22 and the lock releasing means are separately provided. The number of parts can be reduced, and the manufacturing cost can be reduced.

In the above embodiment, the case where the locking means is engaged with the driving gear 29 and the braking gear 31 has been described. However, the locking means may be further engaged with those which are linked to these components. . Also, in the above embodiment,
Although the case where the driving gear 29 meshes with the rack 33 has been described, the present invention is applied to a configuration in which the braking gear 31 meshes with the rack, or a configuration in which the driving gear 29 and the braking gear 31 mesh with separate racks. Of course, it is also possible to apply to things. The spiral spring 2
The present invention is also applicable to a device in which a braking means is connected to a rotating gear by means of 4 and a single gear also functions as the driving gear 29 and the braking gear 31. Further, a sprocket or the like may be used instead of the gear, and a wheel that rotates by meshing or frictional force may be used.

Further, in the above embodiment, the case where the self-closing device main body 20 is almost completely built in the sliding door 1 has been described.
Is installed in the sliding door 1 when the shaft 25
Sliding door 1 so that only the end face (jig engaging face) of
An adjustment hole may be formed at the position corresponding to the end face in the above. In this case, the repulsive force accumulation amount can be adjusted without pulling out the self-closing device main body 20 from the sliding door 1, and furthermore, Workability is improved.

Although the self-closing device main body 20 has been described as being incorporated in the sliding door 1, the self-closing device main body 20 has the sliding door 1 built therein.
That are exposed and mounted on the outside of the
It is needless to say that the present invention can be applied to a frame which faces an opening which can be opened and closed by a sliding door and a device which is attached to the vicinity thereof. In this case, the lever-like or key-like unlocking means is automatically closed. What is necessary is just to provide it detachably with respect to an apparatus main body.
Also in this case, when the sliding door 1 is used, the lock release means is attached to the main body of the self-closing device. Therefore, after using the sliding door 1 for a long period of time, it is attempted to adjust the repulsive force accumulation amount again. Even in such a case, there is no possibility that the storage location of the unlocking means is lost or lost and the repulsive force accumulation amount cannot be adjusted.

In the above embodiment, the case where the oil damper 30 is employed as the braking means has been described.
The present invention is not limited to this, and it suffices if the braking force does not act on one rotation direction (or the acting braking force may be small) and the braking force acts on the other rotation direction.

[0047]

As described above, according to the present invention, the lock means for preventing the reduction of the repulsive force of the repulsive force accumulating means is provided in the self-closing device main body, and the lock releasing means for releasing the locking action by the lock means is provided by the self-closing means. By providing the lock device detachably with respect to the closing device body, the unlocking operation and the locking operation are automatically performed just by attaching and detaching the unlocking means to and from the self-closing device body. Is unnecessary, and the work efficiency in adjusting the amount of repulsive force is improved, and a situation in which the amount of repulsive force cannot be adjusted due to the loss of the rotation preventing screw as in the related art does not occur.

Further, by configuring the locking operation by the locking means when the self-closing device main body is out of the predetermined accommodation position of the sliding door, the adjusting means of the self-closing device main body can be seen outside. Therefore, the adjustment of the repulsive force accumulation amount can be freely and reliably performed without being conscious, and the operability is improved.

Further, a spiral spring is used as the repulsive force accumulating means, and a driving wheel body which is rotated by the repulsive force of the spiral spring and a braking means are arranged in the self-closing device main body, and the driving force is applied by the urging force. The self-closing device main body can be realized with a relatively simple configuration by providing a locking means that engages with the wheel or the braking wheel interlocked with the driving wheel to prevent the rotation of the driving wheel. In addition, the self-closing device main body can be favorably built in the sliding door.

Further, by using a mounting bracket for holding the self-closing device main body as the unlocking means, the number of parts can be reduced as compared with a case where the mounting bracket and the unlocking means are separately provided. It is possible to reduce the production cost.

Further, since the locking means is constituted by a leaf spring, the number of parts can be reduced as compared with a case in which the urging means for urging the locking means is separately provided, and the manufacturing cost can be reduced. Can be completed.

[Brief description of the drawings]

FIG. 1 is a front view of a sliding door self-closing device according to a first embodiment of the present invention, showing a state in which a self-closing device main body is stored in a predetermined built-in position of a sliding door.

FIG. 2 is a front view of the self-closing device, showing a state where the main body of the self-closing device is pulled out from a predetermined built-in position of a sliding door.

FIG. 3 is a front view of a self-closing device for a sliding door according to a second embodiment of the present invention, showing a state where the self-closing device main body is pulled out from a predetermined built-in position of the sliding door.

FIG. 4 is a front view of the self-closing device, showing a state where the main body of the self-closing device is housed in a predetermined built-in position of a sliding door.

FIG. 5 is a front view of a sliding door self-closing device according to a third embodiment of the present invention, showing a state where the self-closing device main body is pulled out from a predetermined built-in position of the sliding door.

FIG. 6 is a front view of the self-closing device, showing a state where the main body of the self-closing device is stored in a predetermined built-in position of a sliding door.

FIGS. 7A and 7B are a side view and a front view of a leaf spring as a locking means of the self-closing device.

FIGS. 8A and 8B are a front view and a bottom view of a mounting bracket as a lock releasing means of the self-closing device.

FIG. 9 is a front view of a sliding door self-closing device according to a fourth embodiment of the present invention, showing a state where the self-closing device main body is pulled out from a predetermined built-in position of the sliding door.

FIG. 10 is a front view of the self-closing device, showing a state where the main body of the self-closing device is stored in a predetermined built-in position of a sliding door.

FIGS. 11 (a), (b) and (c) show a front view, a side view and a bottom view of a leaf spring as a locking means of the self-closing device.

FIGS. 12 (a) and (b) are a front view and a bottom view of a mounting bracket as unlocking means of the self-closing device.

FIG. 13 is a front view of a conventional sliding door self-closing device proposed by the present applicant.

FIGS. 14A and 14B are side views showing an upper left side surface and an upper right side surface of a sliding door, respectively.

FIG. 15 is a perspective view showing a state in which a support bracket and the like are attached to an upper end portion of the sliding door on the door tip side.

FIG. 16 is a perspective view showing a state in which a self-closing device main body and the like are attached to an upper end portion of the sliding door on the door bottom side.

FIG. 17 is a front view showing a state in which a self-closing device main body and the like are attached to an upper end portion of the sliding door on the door bottom side.

FIG. 18 is a plan view of the conventional self-closing device main body of the sliding door (the components on the braking device side are omitted).

FIG. 19 is a front sectional view of the self-closing device main body of the conventional sliding door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sliding door 6 Guide rail 7 Guide roller 20 Self-closing device main body 21 Main body recess 22 Mounting bracket 23 Housing case 24 Spiral spring (repulsive force accumulating means) 25 Shaft (adjusting means) 29 Drive gear 30 Oil damper (braking means) 31) braking gear 33 rack 51 block body 52 compression spring 53 slide plate 55 engagement lever 56 helical spring 57, 60 leaf spring

Claims (6)

[Claims] 1. A self-closing device main body, comprising: a repulsive force accumulating means for accumulating a repulsive force in a reverse direction as the sliding door moves in an opening direction; A self-closing device for a sliding door that automatically performs the closing operation of the sliding door by the repulsive force accumulated when the door is opened. A locking means for performing a locking operation for preventing a decrease in the number of locks is provided in the self-closing device main body, and is detachable from the self-closing device main body. A self-closing device for a sliding door provided with a lock release means for releasing an operation. 2. The self-closing device for a sliding door according to claim 1, wherein the self-closing device main body is built in and attached to the sliding door. 3. The unlocking means is mounted on the sliding door side, and when the self-closing device main body is built in the sliding door, the unlocking means contacts the locking means to perform the unlocking operation. 3. The self-closing device for a sliding door according to claim 2, wherein the locked state of the locking means is maintained when the sliding door is out of a predetermined accommodation position. 4. A spiral spring is used as a repulsive force accumulating means, and a driving wheel body which is rotated by the repulsive force of the spiral spring and a sliding door in the closing direction of the sliding door in comparison with the moving operation of the sliding door in the opening direction. A braking means for braking the moving operation is provided on the main body of the self-closing device, and the locking means is configured to brake the driving wheel or the driving wheel by an urging force when the locking means is not in contact with the unlocking means. The sliding door self-closing device according to any one of claims 1 to 3, wherein the self-closing device is configured to engage with the driving wheel body to prevent rotation of the driving wheel body. 5. The self-closing device according to claim 5, wherein when the self-closing device main body is mounted, the self-closing device main body is guided substantially horizontally in the sliding door and self-closing while preventing the self-closing device main body from moving in the vertical direction. The self-closing device for a sliding door according to any one of claims 1 to 4, which is a mounting bracket for holding the device main body. 6. The locking device according to claim 5, wherein said locking means comprises a leaf spring.
Self-closing device for sliding door as described.