JPH1150736A - Door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety in the closing and opening of a sliding door by providing an adjusting lever to adjust the spring force of a spiral spring for making the spring force adjustable. SOLUTION: When an adjusting lever 7 is rotated to rotate a shaft 2, the moving speed of a sliding door from an opened state toward a closing direction becomes slower. Since a spiral spring 18 is gradually rewound by moving the sliding door in a closing direction and inversely gradually wound up by moving it in an opening direction, the torque of the spiral spring 18 becomes minimum at the position of a closed door and maximum at the position of an opened door. In addition, since the spiral spring 26 is gradually wound up by the movement of the sliding door in a door closing direction and gradually rewound by its movement in a door opening direction, the torque of the spring becomes maximum at the closed position of the sliding door and minimum at its opened position. In the case where the sliding door is moved to open the door from from closed state, a centrifugal brake is in a nonworking state. Thus the sliding door can be moved in the door opening direction only by adding slight external force to the door as a torque for opening it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closer for a sliding door, particularly for a hanging sliding door, and more particularly to a door closer for automatically closing an opened sliding door.

[0002]

2. Description of the Related Art As a door closer for automatically closing an opened door, a hydraulic one is generally used. In addition, as a door closer particularly applied to a sliding door, a closer for a sliding door combining an air damper and a spring is known. In such known sliding door closers, the mounting member on the sliding door side is fixed to the upper portion of the sliding door, and the end is engaged. When the sliding door is opened, the spring is compressed to resist the resistance of the air damper. The sliding door is opened, and the opened sliding door is closed against the resistance of the air damper by the spring force of the spring.

[0003]

However, the above-described known closer for a sliding door is not only large, but also when the sliding door is opened, the spring is compressed to open the sliding door against the resistance of the air damper. Because of the need to open the door, opening the sliding door has become a significant burden for the disabled, the elderly, or the child. When the sliding door is closed, first the sliding door starts closing at a high speed for about 30 cm to 40 cm by the spring force of the spring, and then closes at a low speed due to the resistance of the air damper. High-speed movement was often dangerous for the disabled, elderly or children.

[0004] The present invention has been made in view of the present situation of a door closer for a sliding door as described above. The purpose of the present invention is to open the sliding door lightly with a small force.
An object of the present invention is to provide a door closer in which the opened sliding door is not only automatically closed but also automatically closed at a low speed.

[0005]

In order to achieve the above object, a first embodiment of the present invention is fixed to an upper part of a sliding door,
By winding or rewinding the drive cable derived from both ends of the main body case in the opening and closing direction of the sliding door, the sliding door moves so as to open and close the opening area, and by applying a small external force in the opening direction of the sliding door. A door closer for closing the sliding door by automatically moving the sliding door at a low speed in a closing direction by releasing the application of the external force; A first take-up drum freely attached to the first take-up drum, and a first take-up drum attached to the first take-up drum and wound up when the sliding door is moved in a door opening direction.
And a first drive cable wound around the first winding drum so as to be rewound by winding up the first spring, and a leading end from the main body case being fixed to a wall. A second winding drum rotatably mounted in the main body case, and a second mainspring spring mounted on the second winding drum and rewinded when the sliding door is moved in the door opening direction. The second winding spring is wound so as to be wound around the second spring by rewinding, and is led out from the main body case in a direction opposite to the first drive cable, and the lead-out end is attached to the wall. A door closer having the second drive cable fixed thereto, and a centrifugal brake attached to the second winding drum and operated when the sliding door moves in the closing direction, wherein at least the second drive rope is provided. Shaft supporting the first take-up drum And an adjusting lever for adjusting at least the spring force of the first mainspring, or at least fixing the lead-out end of the first drive cable. A tool is configured so that the drive cable can be wound thereon, and at least the spring force of the first spring can be adjusted freely.

Further, in a second embodiment of the present invention, a drive cable fixed to an upper portion of a sliding door and led out from both ends of a main body case in the opening and closing direction of the sliding door is wound or unwound, and the sliding door defines an opening area. It moves to open and close, and moves in the opening direction of the sliding door by application of a small external force to open the sliding door, and when the application of the external force is released, the sliding door automatically moves at a low speed in the closing direction. A door closer for moving and closing the sliding door, wherein the first winding drum is rotatably mounted in the main body case, and the sliding door is mounted on the first winding drum in a door opening direction. A first spring that is wound up when moved, and a first winding spring that is wound around the first winding drum so as to be rewound by the winding of the first spring and fixed to a wall portion at an end that extends from the main body case. The first drive to be done A cord, a second winding drum rotatably mounted in the main body case, and a second mainspring spring mounted on the second winding drum and rewinded when the sliding door is moved in the door opening direction. Is wound around the second winding drum so as to be wound by rewinding the second spring, and is led out from the main body case in a direction opposite to the first drive cable, and the leading end is a wall portion. Said second fixed to
And a centrifugal brake which is increased in speed via a gear provided so as to rotate integrally with the second winding drum in only one direction, and which operates only when the sliding door moves in the closing direction. An adjusting lever for adjusting at least a spring force of the first mainspring, wherein a shaft for supporting at least the first winding drum is operably attached from outside the main body case. Or at least a fixture for fixing the lead-out end of the first drive rope is configured so that the drive rope can be wound thereon, and at least the spring force of the first spring can be adjusted freely. It is characterized by having done.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the structure of one embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
-B sectional view, FIG. 4 is an explanatory view showing an attached state to the closed sliding door of one embodiment of the present invention, FIG. 5 is an explanatory view showing a state where the sliding door is opened halfway from FIG. 4, and FIG. 6 is FIG. FIG. 7 is a characteristic diagram showing the operation of the embodiment shown in FIG. 1, FIG. 8 is a front view showing the configuration of another embodiment of the present invention, and FIG. It is CC sectional drawing of.

In the present invention, as shown in FIGS. 1 and 2, the main body case 1 has a first chamber 1a and a second chamber 1b in the longitudinal direction.
A bearing opening 3 is formed in the upper plate of the first chamber 1a, and the shaft 2 that supports the winding drum 15 at the lower end portion of the bearing opening 3 rotates with the end portion 4 protruding. The take-up drum 15 is freely rotatably supported, and a groove 16 is formed on the peripheral surface of the winding drum 15. A drive cable 17 is wound around the groove 16. A spring 18 is provided above the winding drum 15, and an outer end of the spring 18 is fixed to a spring hook (not shown) provided in a barrel 19 formed on the winding drum 15. The inner end of the mainspring 18 is fixed to a spring hook 20 provided on the shaft 2. An adjust lever 7 is fixed to the end 4 of the shaft 2 via a flat washer 5 and a wave washer 6 with a screw 9, and the adjust lever 7 rotates integrally with the shaft 2.

On the other hand, a long hole 10 is formed in the adjusting lever 7, and a stopper pin 12 is attached to one end of the long hole 10 by a spring pin 11 so as to be rotatable over an angle range of about 90 °. . Further, a rib 13 is formed on the upper plate of the main body case 1 over substantially the entire circumference.
A notch for positioning the elongated hole 10 is formed between the end portions 13a and 13b, and the stopper pin 12 is disposed in the elongated hole 10.

A bearing 21 is provided in the second chamber 1b, and a shaft 23 to which a winding drum 22 is fixed is rotatably supported by the bearing 21.
A groove 24 is formed on the peripheral surface of the drive cable 25, and a drive cable 25 is wound around the groove 24. A mainspring spring 26 is provided above the winding drum 22, and an outer end of the mainspring spring 26 is fixed to a spring hook (not shown) provided on a barrel 27 formed on the winding drum 22. Spring 2
The inner end of 6 is fixed to a spring hook 28 provided near the bearing 21 of the main body case 1.

A brake drum 29 is attached to the shaft 23 below the winding drum 22,
And a one-way clutch 30 in which the outer ring rotates integrally. A centrifugal brake 32 is slidable on an inner wall 33 of the second chamber 1b of the main body case 1 with a support shaft 31 as a fulcrum on the brake drum 29. Installed. At the tip of the centrifugal brake 32, as shown in FIG. 3, a brake spring 35 is interposed in the guide hole 34, and the centrifugal brake 32 that operates when the sliding door moves in the closing direction does not escape during sliding. It is configured to press.
Further, a cover 40 is fixed to the main body case 1 with a flathead screw 37 so as to cover the bottom of the main body case 1.
0 is also provided with a bearing portion for the shaft 2 and the shaft 23.

According to the present invention having such a structure, the drive ropes 17, 25 fixed to the upper part of the sliding door 42 as shown in FIG.
Each of them is led out in the opening and closing direction of the sliding door 42, and the ends thereof are fixed to the walls by fixing members 44 and 44 ', respectively. FIG. 4 shows a state in which the sliding door 42 is closed. In this closed state, the mainspring spring 18 is unwound, and the drive cable 17 is wound around the winding drum 15.
6 is wound up and the drive rope 25 is rewound from the winding drum 22.

Next, the operation of the above embodiment of the present invention will be described. The mainspring spring 18 is gradually rewinded when the sliding door 42 moves in the closing direction, and is gradually wound up when the sliding door 42 moves in the opening direction, so that the torque A of the mainspring 18 is reduced as shown in FIG. Door closing position L1
And the maximum at the opening position L2 of the sliding door 42.
Further, the mainspring spring 26 is gradually wound up when the sliding door 42 moves in the closing direction, and is gradually rewinded when the sliding door 42 moves in the opening direction. Maximum, sliding door 4
2 at the door opening position L2. Further centrifugal brake 3
2 operates only when the one-way clutch 30 moves the sliding door 42 in the closing direction, and the brake torque C
Varies depending on the rotation speed of the brake drum 29,
It becomes almost maximum at the opening position L2 of the sliding door 42 and becomes minimum at the closing position L1 of the sliding door.

Therefore, when the sliding door 42 is moved from the closed state to the opening direction, the centrifugal brake 32 is in the inoperative state, and the torque for moving the sliding door 42 in the opening direction is AB. When a small external force is applied to the sliding door 42, the sliding door 42 moves in the door opening direction, so that the sliding door 42 can be easily opened by a disabled person, an elderly person or a child.

When the sliding door 42 is moved to the position L and the torque A of the mainspring spring 18 is TA, the torque B of the mainspring spring 26 is TB, and the braking torque C of the centrifugal brake 32 is TC, the sliding door is at the position L. The torque D given to the door 42 in the door closing direction is expressed by the following equation (1).

[0016]

## EQU1 ## D = TA- (TB + TC)

In the present invention, the torque characteristics of the mainspring springs 18 and 26 and the brake torque characteristics of the centrifugal brake 32 are selected so that D moves the sliding door 42 in the closing direction at a low speed. For this purpose, the sliding door 42 is moved from the closed state shown in FIG. 4 in the door opening direction as shown in FIG. 5, so that a part of the opening area 43 is opened, and the sliding door 42 is further opened. When the opening area 43 is fully opened and the hand is removed from the sliding door 42 as shown in FIG. 6, the sliding door 42 moves in the closing direction at a low speed, and the sliding door automatically closes.

In the present invention, the stopper pin 12 of the adjustment lever 7 is set to about 90 ° as shown by the imaginary line in FIG.
After rotation, turn the adjustment lever 7 to rotate the shaft 2
, The spring force of the mainspring 18 is adjusted from the outside of the main body case 1 to adjust the speed of the sliding door 42 moving from the opened state to the closed direction.

The reason why the winding drum 22 and the mainspring 26 wound around the winding drum 22 are provided in the above-described embodiment is that the driving cable 17 is not loosened even when an external force is applied. Further, in the above-described embodiment, the example in which the two winding drums 15 and 22 are provided inside the main body case 1 and the main body case is fixed to the sliding door has been described. Can be fixed to the wall portions on both sides, and the end of the drive cable extending from each winding drum can be fixed to the sliding door.

8 and 9 show that the centrifugal force acting on the centrifugal brake is increased by increasing the speed of the brake drum, and the braking torque of the centrifugal brake is increased to further reduce the moving speed of the sliding door in the closing direction. This shows an embodiment in which a mechanism for adjusting at least the spring force of the mainspring spring 18 is simplified. 8 and 9, the same or similar members as those in the above-described embodiment are denoted by the same reference numerals in the drawings. That is, in the embodiment shown in FIGS. 8 and 9, a gear 45 and a one-way clutch 30 in which the gear 45 and the outer ring rotate integrally are supported on the shaft 23 below the winding drum 22. Further, a speed-increasing gear 46 having a gear 46a meshing with an outer gear 45a of the gear 45 on the inner periphery is rotatably provided on a support shaft 47 provided so as to straddle the main body case 1 and the cover 40. A brake drum 48 provided on the inner periphery with a gear 48a meshing with a gear 46b provided on the outer periphery of the shaft 2 is rotatably mounted on the shaft 2. A centrifugal brake 50 is attached to the brake drum 48 such that the centrifugal brake 50 can slide on the inner wall 51 of the first chamber 1a of the main body case 1 in the same manner as in the above-described embodiment. Other configurations of the centrifugal brake 50 are the same as those of the above-described embodiment.

In the embodiment shown in FIG. 8 and FIG.
Is fully opened, and the hand is removed from the sliding door 42, the winding drum 22 is rotated by the mainspring spring 18 so as to rewind the drive rope 25, and the gear 45 is rotated via the one-way clutch 30. The transmission is transmitted to the brake drum 48 via the speed increasing gear 46, and the gear 45, the speed increasing gear 46, and the brake drum 48 are sequentially increased in speed by the meshing of the gears to increase the rotation speed, and as a result, the centrifugal force is increased. The brake torque of the brake 50 increases and the inner wall 51
The doors 4
2 moves at a lower speed in the door closing direction. Therefore, in the embodiment shown in FIGS. 8 and 9, when the rotation transmitted to the gear 45 is transmitted to the brake drum 48 via the speed increasing gear 46, the speed is increased, and the centrifugal force acting on the centrifugal brake 50 increases. Since the centrifugal brake can be significantly reduced in size as compared with the above-described embodiment, the door closer can be significantly reduced in size and weight as a whole.
8 and 9 show the case where the speed increasing gear 46 is provided, this speed increasing gear may be removed or an additional speed increasing gear may be provided in some cases.

Further, in the embodiment shown in FIGS. 8 and 9, annular grooves 52, 5 a are respectively provided on outer peripheral portions of fixtures 44 a, 44 a ′ for fixing the leading ends of the drive cables 17, 25 to the wall.
2 'is provided so that the drive ropes 17 and 25 can be wound around this annular groove. And the driving cable 17 and the driving cable 2
5 is wound around the annular grooves 52, 52 ', and the number of windings is increased or decreased, so that the first winding drum 15 or the first winding drum and the second winding drum 22 Since the torque values of the first spring 18 and the second spring 26 change, the spring forces of the springs 18 and 26 can be adjusted by a simple method. 8 and 9 may be provided with an adjusting lever 7 for adjusting the spring force of the mainspring shown in FIGS. 1 and 2.
Also, the fixing members 44a and 44'a for adjusting the spring force of the mainspring shown in FIGS. 8 and 9 may be used in the embodiments of FIGS. 1 and 2 instead of the adjusting lever 7 for adjusting the spring force of the mainspring. it can.

As explained above, according to the present invention,
The sliding door 42 can be opened with a small force from the closed state, and the opened sliding door 42 moves at a low speed in the closing direction, and the opened sliding door is automatically closed, and the sliding door 42 is closed. You can fine-tune the speed of movement in the direction,
It is possible to operate easily and safely even for the handicapped, elderly or children.

[0024]

As described above, according to the present invention, when the sliding door is moved in the opening direction from the closed state, the first winding drum in the main body case rotates, and the first spring is wound up. , The first drive cable is rewound, the second winding drum in the main body case rotates, the second spring is rewound, and the second drive cable is engulfed. The centrifugal brake attached to the take-up drum does not operate, and the sliding door can move with a small external force in the opening direction, while the opening area of the sliding door is opened, and when the application of the external force to the sliding door is released, the first The mainspring spring is unwound, the first drive cable is wound around the first winding drum, the second spring spring is hoisted,
A second driveline is unwound from the second take-up drum and
When the centrifugal brake of the take-up drum is activated, the sliding door moves at a low speed in the closing direction, and the opening area of the sliding door is closed, so that the sliding door can be easily opened by the disabled, elderly or children. In addition, the automatic door can be safely closed at a low speed.

The sliding door can be operated at a lower speed in the closing direction by providing the centrifugal brake so as to increase the speed thereof through a gear mounted on the second winding drum, instead of directly mounting the centrifugal brake on the second winding drum. The centrifugal brake itself can be moved and the door can be safely closed, and the centrifugal brake itself does not need to be increased in size to increase the braking torque. As a result, the entire door closer can be reduced in size and weight.

Further, in the present invention, at least the first winding drum of the first winding drum and the second winding drum is provided with an adjustment lever operably attached from outside the main body case, or A first driveline and a second
By winding the drive cable a desired number of times on a fixture for fixing the lead-out end of at least the first drive cable of the first drive cable, at least a first spring of the first spring spring and the second spring spring can be provided. Since the spring force of the first spring is adjusted, it is possible to easily adjust the sliding resistance of the sliding door and set a comfortable operation and a closing condition for the sliding door.

[Brief description of the drawings]

FIG. 1 is a front view showing the configuration of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an explanatory view showing a state of attachment to a closed sliding door according to one embodiment of the present invention.

FIG. 5 is an explanatory view showing a state where the sliding door is opened halfway from FIG. 4;

FIG. 6 is an explanatory view showing a state where the sliding door is fully opened from FIG. 4;

FIG. 7 is a characteristic diagram showing the operation of the embodiment shown in FIG.

FIG. 8 is a front view showing the configuration of another embodiment of the present invention.

FIG. 9 is a sectional view taken along the line CC in FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 1a 1st chamber 1b 2nd chamber 2 Shaft 3 Bearing opening 4 End part 5 Flat washer 6 Wave washer 7 Adjust lever 9 Screw 10 Elongated hole 11 Spring pin 12 Stopper pin 13 Rib 13a, 13b Rib end 15, 22 Winding drum 16 Groove 17, 25 Driving cable 18, 26 Spring spring 19, 27 Barrel 20, 28 Spring hook 21 Bearing 23 Shaft 24 Groove 29, 48 Brake drum 30 One-way clutch 31, 49 Support shaft 32, 50 Centrifugal brake 33 , 51 Inner wall 34 Guide hole 35 Brake spring 37 Countersunk screw 40 Cover 42 Sliding door 43 Open area 44, 44 ', 44a, 44'a Fixture 45 Gear 45a, 46a, 46b, 48a Gear 46 Speed-up gear 52, 52' Ring groove

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Takeaki Murase 4-4-4 Momoi, Suginami-ku, Tokyo Star Teng Industry Co., Ltd.

Claims (4)

[Claims] 1. A drive cable fixed to an upper part of a sliding door, which winds or unwinds a drive cable derived from both ends of a main body case in an opening and closing direction of the sliding door, moves so that the sliding door opens and closes an opening area, and To move the sliding door in the opening direction of the sliding door by applying a small external force to open the sliding door, and by releasing the application of the external force, the sliding door automatically moves at a low speed in the closing direction to close the sliding door. A first winding drum rotatably mounted in the main body case; and a first mainspring mounted on the first winding drum and wound up when the sliding door is moved in a door opening direction. A first drive cable wound around the first winding drum so as to be rewound by the winding of the first mainspring spring, and a leading end from the main body case fixed to a wall; The rotating case is A second winding drum attached to the second winding drum, a second mainspring spring attached to the second winding drum, which is unwound when the sliding door is moved in the door opening direction, and a second winding drum. The second drive, which is wound so as to be wound by rewinding the second spring and is led out from the main body case in a direction opposite to the first drive cable, and the lead-out end is fixed to a wall portion. A door closer comprising: a rope; and a centrifugal brake attached to the second winding drum and operated when the sliding door moves in a closing direction. 2. A driving cable fixed to an upper part of a sliding door, which winds or unwinds a drive cable led out from both ends of a main body case in the opening and closing direction of the sliding door, moves so that the sliding door opens and closes an opening area, and To move the sliding door in the opening direction of the sliding door by applying a small external force to open the sliding door, and by releasing the application of the external force, the sliding door automatically moves at a low speed in the closing direction to close the sliding door. A first winding drum rotatably mounted in the main body case; and a first mainspring mounted on the first winding drum and wound up when the sliding door is moved in a door opening direction. A first drive cable wound around the first winding drum so as to be rewound by the winding of the first mainspring spring, and a leading end from the main body case fixed to a wall; The rotating case is A second winding drum attached to the second winding drum, a second mainspring spring attached to the second winding drum, which is unwound when the sliding door is moved in the door opening direction, and a second winding drum. The second drive, which is wound so as to be wound by rewinding the second spring and is led out from the main body case in a direction opposite to the first drive cable, and the lead-out end is fixed to a wall portion. A cord, and a centrifugal brake that is accelerated through a gear provided to rotate integrally with the second winding drum only in one direction, and that operates only when the sliding door moves in the closing direction. And door closer. 3. An adjusting lever for adjusting at least a spring force of the first mainspring, wherein a shaft for supporting at least the first winding drum is operably attached from outside the main body case. The door closer according to claim 1, wherein the door closer is provided. 4. A fixing device for fixing at least a lead-out end of the first driving cable so that the driving cable can be wound thereon, and at least a spring force of the first spring can be adjusted. The door closer according to claim 1 or 2, wherein the door closer is provided.