JP2000008695A - Automatic closing device for sliding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly open or close a door and prevent fingers from being caught and injured by providing a speed-regulator comprising a unidirectional clutch, an epicyclic gear, etc., in a winding drum for a rope and rotating the drum lightly on opening the door and rotating the drum at a low speed on closing it. SOLUTION: An automatic closing device in which a winding drum 1A for a rope, a speed-adjustor 1D, etc., are attached onto a base 11, is fixed to an end of a sliding door, and the tip of the rope is fixed to the opening vertical fame. In this case, the automatic closing device can be fixed to the vertical frame side and the tip of the rope can be fixed to the sliding door side. A spring device urging the rope to the winding direction and a winding force adjusting device 1C varying the urging force are built in the winding drum 1A and also the speed-adjuster 1D is provided therein. When opening the sliding door, the rope is paid out at a low load to open it light. When closing it, a high load is given to slowly close it. In this way, the structure is made compact and certainty and safety for closing the door can be improved.

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 capable of automatically closing a sliding door, and more particularly to a sliding door self-closing device capable of opening the sliding door lightly and at a low speed. The present invention relates to a sliding door self-closing device that can reliably close a sliding door while performing an operation to prevent injuries such as finger stuffing.

[0002]

2. Description of the Related Art Conventionally, as a sliding door self-closing device capable of automatically closing a sliding door, a rail of the sliding door is tilted so that a closing direction of the sliding door is lowered, and the rail is attached to an opening upper frame or the like. The sliding door is configured to move along the rail by its own weight (hereinafter referred to as "inclined rail system"). A rope fixing device for locking the tip of the rope, a winding drum for winding the rope, and a winding drum for winding the rope It is provided with a winding means for urging the take-up drum in a direction in which the cable is wound, and comprises a self-closing device main body for unwinding and winding the cable in accordance with opening and closing of the sliding door. A cable fixing device attached to one of the fixed side and the sliding door side, and a self-closing device main body attached to the other (hereinafter, referred to as a cable type) have been put to practical use.

[0003]

[Problems to be solved by the invention] By the way,
The self-closing device for sliding doors of the inclined rail system is based on the inclination angle of the rail, the weight of the sliding door, the moving distance of the sliding door, etc.
The moving speed of the sliding door changes, specifically, as the inclination angle of the rail and the weight of the sliding door increase, and as the moving distance of the sliding door increases, the moving speed of the sliding door increases. There was a problem that adjustment was difficult. In addition, since the moving speed of the sliding door is low at the start of the closing operation and high at the end of the closing operation, the sliding door stops so as to collide with the opening vertical frame or the like. There is a possibility that a sound may be generated and an injury such as stuffing of a finger may be caused. To cope with this, a buffering mechanism such as an air damper is also provided. However, there is a problem that the number of parts increases and the cost increases.

[0004] On the other hand, the cable-type sliding door self-closing device has an advantage that the structure is compact, but the urging force of the winding means for urging the winding drum in the direction of winding the cable. The load at the time of opening the sliding door, the moving speed of the sliding door at the time of closing the sliding door, and the closed state of the sliding door will be determined, but while the sliding door can be opened easily, injury such as finger jamming etc. In order to prevent the opening of the sliding door at a low speed,
It has been difficult to select a winding means that meets the conflicting requirements of ensuring that the sliding door can be closed.

The present invention has been made in view of the above-mentioned problems of the conventional self-closing device for sliding doors, and has the advantage of a cord-type self-closing device for a sliding door, which has a compact structure.
The sliding door opening and closing operation can be performed lightly, and the sliding door can be closed at a low speed. It is intended to provide a closing device.

[0006]

In order to achieve the above object, a self-closing device for a sliding door according to the present invention is provided with a rope fixing device for locking a tip of a rope, and a rope fixing device for following the opening and closing of the sliding door. A sliding door comprising a self-closing device main body that unwinds and rewinds, and a cord fixing device is attached to one of a fixed side or a sliding door side such as an open vertical frame, and the self-closing device main body is mounted to the other. A self-closing device, a self-closing device body, a winding drum for winding the cable, a winding means for urging the winding drum in a direction for winding the cable, and a low load when the sliding door is opened. And a speed-control means for increasing the rotational resistance of the winding drum and winding the rope with a high load when the sliding door is closed.

This self-closing device for a sliding door has a compact structure of a main body of the self-closing device, and can be attached to either a fixed side such as an open vertical frame or a sliding door side. The speed control means for increasing the rotational resistance of the winding drum and winding the cable with a high load when the sliding door is closed. By appropriately adjusting the winding means for urging the cable in the direction of winding the cable, the sliding door can be opened lightly and the sliding door can be closed at a low speed. Thus, it is possible to reliably close the sliding door while preventing such injuries.

In this case, the speed control means can be constituted by a one-way clutch mechanism and a planetary gear mechanism.

Thus, switching between the opening operation and the closing operation of the sliding door can be automatically and easily performed using the one-way clutch mechanism, and at the time of closing operation of the sliding door using the planetary gear mechanism. The rotation resistance of the winding drum can be stably increased, and the closing operation of the sliding door can be performed at a low speed.

Further, the self-closing device main body can be provided with a winding force adjusting means for varying the magnitude of the urging force of the winding means for urging the winding drum in the direction of winding the cable.

[0011] Thus, the magnitude of the urging force of the winding means can be adjusted according to the weight of the sliding door, etc., and the load at the time of opening the sliding door, the moving speed of the sliding door at the time of closing the sliding door, and the sliding door. The closed state can be easily adjusted.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sliding door self-closing device according to an embodiment of the present invention.

The self-closing device for a sliding door comprises a main body 1 of the self-closing device.
Although not particularly limited, for example, as shown in FIG. 7, the self-closing device main body 1 is placed on the sliding door D side, 2 is attached to the fixed side H such as an open vertical frame, and the cord 3 is used so that the cord 3 is bridged between the self-closing device main body 1 and the cord fixture 2.

The sliding door D is supported by a method in which the sliding door D is suspended from a suspension guide rail fixed to the upper opening frame via a runner, or a door wheel attached to the sliding door by a sill rail fixed to the lower opening frame. Any supporting method such as a supporting method can be adopted.

The self-closing device main body 1 is, as shown in FIGS. 1 and 2, a winding drum 1A on which a cable 3 is wound around a base 11.
Is built in the winding drum 1A, and the winding drum 1A
Means 1B for urging the wire in the direction of winding the cable 3, a winding force adjusting means 1C for varying the magnitude of the urging force of the winding means 1B, and a low load when the sliding door D is opened. And a speed-control means 1D for increasing the rotational resistance of the winding drum 1A and winding up the cable 3 with a high load when the sliding door D is closed, and a cover for covering these means. 17 is attached to the base 11. In this case, the winding means 1B and the winding force adjusting means 1C are connected to the winding drum 1A.
In addition, the structure of the self-closing device main body 1 can be made more compact by being built concentrically.

As shown in detail in FIG. 3, the base 11 has a columnar mounting bracket 12, a winding drum shaft 13, a speed adjusting means mounting shaft 14, a guide roller shaft 15, and a base mounting hole 16 formed at predetermined positions. At the end of the mounting bracket 12, a mounting plate 17 shown in FIG. 4 is provided and fixed by screws. And
Between the base 11 and the mounting plate 17, the winding drum 1A is rotatably mounted on the winding drum shaft 13 via the drum shaft 26.
4, a speed control means 1D is attached, and further, a guide roller 18 is rotatably attached to the guide roller shaft 15, and the rope 3 is sandwiched by the guide rollers 18, so that the rope 3 is
The guide is accurately guided to a predetermined position on the winding drum 1A.

As shown in detail in FIG. 5, the winding drum 1A has a flange 22 on one end of a drum body 21 having a required diameter and a second end so that the cable 3 having a required length can be wound around the outer peripheral surface. A spur gear 23 is integrally formed on the side and formed into a flanged drum shape, and a spring housing chamber 2 in which a spiral spring 27 in which a flat spring constituting the winding means 1B is spirally wound is housed.
4 and one end 2 of the spiral spring 27.
7a is locked in a spring locking groove 25 provided on the drum main body 21 side, and the other end side 27b is locked in a spring locking groove 26b of the drum shaft 26. As shown in FIG. 7, the drum shaft 26 has a cylindrical shape and has a shaft fitting hole 26a at the lower end concentrically fitted with the winding drum shaft 13 and a cam at the upper end of the winding force adjusting means 1C. A locking portion 26c is formed by partially cutting out an upper outer peripheral surface so as to be fitted and locked to the main body 30, and a slit-shaped spring locking groove is formed on the outer peripheral side along the longitudinal direction of the drum shaft. 26b are formed. This allows
The drum shaft 26 fitted to the winding drum shaft 13 is supported so as to be freely rotatable with respect to the winding drum shaft 13, and the winding drum 1A is, as shown in FIG. The shaft 13 is supported so as to freely rotate with respect to the thick boss portion 13B.

The winding means 1B for urging the winding drum 1A in the direction of winding the cable 3 is provided by the drum main body 2 as described above.
One end 27 of a spiral spring 27 in which a flat spring accommodated in a spring accommodating chamber 24 formed inside is spirally wound a required number of times.
a is locked in a spring locking groove 25 provided in the drum main body 21 side, and the other end 27b is locked in a spring locking groove 26b of the drum shaft 26. In this case, the material of the spiral spring 27,
The winding drum 1A is required for thickness, width, number of windings, etc.
Is appropriately selected or set in accordance with the magnitude of the urging force of the winding means 1B which urges the wire 3 in the winding direction.

In the winding drum 1A, in addition to a winding means 1B comprising a spiral spring 27, a winding force adjusting means 1C for making the magnitude of the urging force of the spiral spring 27 of the winding means 1B variable. Is arranged. As shown in FIGS. 1 to 2, 6 and 8, the winding force adjusting means 1 </ b> C has a disk-shaped cam body 30 having sawtooth-shaped teeth 30 t formed on an outer peripheral surface thereof, and a cam body 30. An operating claw 31 slidably mounted on the mounting plate 17 for engaging the cam body 30 with the teeth 30t of the thirty. The cam body 30 is mounted so as to cover a spring accommodating chamber 24 for accommodating the spiral spring 27 of the winding drum 1A, and an upper end 26c of the drum shaft 26 is inserted into an oval locking hole 30b formed in the cam body 30. So that the drum shaft 26 and the cam body 30 rotate together, and the rotating operation piece 3 is provided on the upper surface of the cam body 30.
The rotary operation piece 30a is integrally formed so that the rotary operation piece 30a can be rotated using a screwdriver or a spanner. Then, saw-toothed teeth 30t formed on the outer peripheral surface of the cam body 30
Operating claw 3 slidably mounted on mounting plate 17
1 and engage the cam body 30 in one direction, for example, in a direction in which the magnitude of the urging force of the spiral spring 27 is increased.
The rotation operation can be performed via Oa, and the rotation operation can be prevented in the reverse direction. As shown in detail in FIG. 8, the operation claw 31 has a flat operation piece main body 31 having a saw-toothed claw 31 a formed at its tip to engage with the teeth 30 t of the cam main body 30.
The operation piece 31c is protrudingly provided on the b, and a spring stopper 31d is integrally formed on the side opposite to the claw 31a. The operation claw 31 inserts the operation piece 31c into a hole 17h formed in the mounting plate 17, and slides the operation piece main body 31b between guide pieces 17g provided in parallel on both sides of the hole 17h. Movably supported and spring-loaded 31d
And a spring 32 is inserted between the spring stopper 31d and the spring stopper 17d protruding from the mounting plate 17 in opposition to the spring stopper 31d.
With the urging force of the spring 32, the operation claw 31 is moved to the cam body 30.
The pawls 31a are engaged with the teeth 30t of the cam body 30 so as to urge them toward the side.

In order to adjust the magnitude of the biasing force of the spiral spring 27 of the winding means 1B using the winding force adjusting means 1C, it is necessary to increase the magnitude of the biasing force of the spiral spring 27. By rotating the cam body 30 via the rotary operation piece 30a, the spiral of the spiral spring 27 is further rotated in the winding direction. On the other hand, when reducing the magnitude of the urging force, the operation piece 31 of the operation claw 31 is used.
c, the engagement between the pawl 31a of the operation piece 31 and the teeth 30t of the cam body 30 is released, so that the cam body 30 can be rotated via the rotation operation piece 30a. To rotate in the direction in which the spiral is released. When the operation of the operation piece 31c of the operation claw 31 is released after the rotation operation is performed, the claw 31a of the operation piece 31
The cam body 30 is fixed so as to mesh with the zero tooth 30t, and the biasing force of the spiral spring 27 of the winding means 1B can be maintained at the adjusted predetermined magnitude.

As shown in FIGS. 1 and 9, the speed control means 1D comprises a one-way clutch 40 and a planetary gear mechanism 50. The operation of the one-way clutch mechanism 40 causes the sliding door D to be opened. When the sliding door D is opened, the planetary gear mechanism 50 does not operate. On the other hand, when the sliding door D is closed, the planetary gear mechanism 50 operates automatically. And by the action of the planetary gear mechanism 50,
At the time of the closing operation of the sliding door D, the rotational resistance of the winding drum 1A is increased so that the closing operation of the sliding door D can be performed at a low speed. As shown in FIG. 9 (A), the one-way clutch 40 forms a spur gear 41 on the outer periphery and engages with the spur gear 23 formed on the outer periphery of the winding drum 1A so that the one-way clutch 40 rotates synchronously. At the same time, a locking groove 42 that locks with the pin 43 is formed on the inner peripheral surface only when rotating in one direction, that is, only when the sliding door D is closed. The pin 43 is inserted into a claw fitting hole 44 a formed in a boss 44 of the speed control means mounting shaft 14 to which the speed control means 1 D is mounted, and is also inserted into a locking groove 42 of the one-way clutch 40 by a spring 45. Be biased in the direction of engagement.

The cable fixing device 2 for locking the tip of the cable is
Using any fixing tool such as a screw or nail, fixed side H such as an open vertical frame
Although not particularly limited, it is usually fixed to an upper portion of the fixed side H such as an open vertical frame.

The material and shape of the cable 3 are limited as long as the cable 3 can sufficiently withstand the tension repeatedly applied when the sliding door D is opened and closed, and can be smoothly unwound and wound. Instead of, for example, diameter 1mm-3
A steel wire of about mm or the like can be employed.

The operation of the sliding door self-closing device of the present invention will be described below. As shown in FIG. 10, the cord fixing tool 2 is screwed to a fixing side H such as an open vertical frame, and the self-closing device main body 1 is fixed to the sliding door D side with screws, and the self-closing device main body is fixed. The leading end of the cable 3 wound around the winding drum 1A is fixed to the cable fixing device 2. In this case, it is desirable to install the self-closing device main body 1 and the cord fixing tool 2 so as to face horizontally.

When the sliding door D is opened along a hanging guide rail, a sill rail, or the like, the leading end of the rope 3 is fixed to a fixed side H such as an open vertical frame via the rope fixing tool 2. The rope 3 is unwound from the winding drum 1A in accordance with the opening operation of. At this time, the spiral spring 2 of the winding means 1B
7, the winding drum 1A rotates, and a restoring force is accumulated in the spiral spring 27 of the winding means 1B. By the way, at the time of the opening operation of the sliding door D, since the one-way clutch 40 does not operate the planetary gear mechanism 50, the rope 3 is unwound from the winding drum 1A with a low load, and the opening operation of the sliding door D is performed lightly. What you can do.

When the force for opening the sliding door D is released in this state, the rope 3 is wound up by the winding drum 1A by the restoring force accumulated in the spiral spring 27 of the winding means 1B, Thereby, the sliding door D starts the closing operation. By the way, during the closing operation of the sliding door D, the one-way clutch 40
, The planetary gear mechanism 50 operates, the rotational resistance of the winding drum 1A increases, and the sliding door D closes at a low speed.

In this case, according to the weight of the sliding door D, the moving distance of the sliding door, etc., the speed controlling means 1D and the winding means 1B for urging the winding drum 1A in the direction of winding the cable 3 are wound. The opening operation of the sliding door D can be performed lightly by appropriately adjusting the intake force adjusting means 1C and the like, and by performing the closing operation of the sliding door D at a low speed, while preventing injury such as finger jamming, This makes it possible to reliably close the sliding door D.

[0028]

According to the self-closing device for a sliding door of the present invention, the structure of the main body of the self-closing device is compact, and can be attached to either the fixed side such as an opening vertical frame or the sliding door side, and the sliding door can be mounted on the sliding door side. When the opening operation, the rope is unwound with a low load, and at the time of the closing operation of the sliding door, the speed control means for increasing the rotational resistance of the winding drum and winding the rope with a high load is provided. Means and the winding means for urging the winding drum in the direction of winding the cable can be adjusted appropriately, so that the sliding door can be opened lightly and the sliding door can be closed at a low speed. By doing so, it is possible to reliably close the sliding door while preventing injury such as finger stuffing and the like, and it is possible to provide a highly safe self-closing device for the sliding door.

Further, the speed control means is constituted by a one-way clutch mechanism and a planetary gear mechanism, so that switching between the opening operation and the closing operation of the sliding door is automatically and simply performed using the one-way clutch mechanism. When the sliding door is closed using the planetary gear mechanism, the rotational resistance of the winding drum can be stably increased, and the sliding door can be closed at a low speed.

Further, the self-closing device main body is provided with winding force adjusting means for changing the magnitude of the urging force of the winding means for urging the winding drum in the direction of winding the cable, so that the sliding door can be moved. It is possible to adjust the magnitude of the urging force of the winding means according to the weight, etc., and to easily adjust the load when the sliding door is opened, the moving speed of the sliding door when the sliding door is closed, and the closed state of the sliding door. Can be.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a self-closing device main body of a self-closing device for a sliding door according to the present invention.

FIG. 2 is a front view showing a state where a cover of the self-closing device main body is removed.

3A and 3B show a base, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a side view.

FIG. 4 shows a mounting plate, (A) is a front view, (B)
Is a rear view, and (C) is a plan view.

5A and 5B show a winding drum, wherein FIG. 5A is a rear view, FIG. 5B is a plan view, and FIG. 5C is a front view.

6A and 6B show a cam body of the winding force adjusting means, wherein FIG. 6A is a rear view, FIG. 6B is a plan view, and FIG.

7A and 7B show a drum shaft, wherein FIG. 7A is a rear view, FIG. 7B is a plan view, and FIG. 7C is a front view.

8 (A) is a plan view, FIG. 8 (B) is a rear view, and FIG. 8 (C) is a side view.

9A and 9B show a speed adjusting means, in which FIG. 9A is a rear view in which a planetary gear mechanism is removed and a part is cut away, and FIG. 9B is a plan view.

FIG. 10 is an explanatory view showing a state in which the sliding door self-closing device of the present invention is applied to a sliding door.

[Explanation of symbols]

 D Sliding door H Fixed side 1 Self-closing device main body 1A Winding drum 1B Winding means 1C Winding force adjusting means 1D Speed control means 2 Cable fixing tool 3 Cable

Claims (3)

[Claims] 1. A rope fixing device for locking a leading end of a rope, and a self-closing device main body for unwinding and winding the rope following opening and closing of a sliding door. In a self-closing device for a sliding door, in which a cable fixing device is attached to one of a fixed side and a sliding door side, and a self-closing device main body is attached to the other, a winding drum for winding a rope around the self-closing device main body. Winding means for urging the winding drum in a direction in which the rope is wound, and when the sliding door is opened, unwinds the rope with a low load;
A self-closing device for a sliding door, comprising: a speed-control means for increasing the rotational resistance of the winding drum and winding the cable with a high load when the sliding door is closed. 2. The self-closing device for a sliding door according to claim 1, wherein the speed adjusting means comprises a one-way clutch mechanism and a planetary gear mechanism. 3. The self-closing device main body further comprises winding force adjusting means for changing the magnitude of the urging force of the winding means for urging the winding drum in the direction of winding the cable. The self-closing device for a sliding door according to claim 1.