JP2002188350A - Automatic door closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open an automatic closing door and to close the door with the strong force when the door comes close to the closing position. SOLUTION: When opening the door, a main spring and an auxiliary spring are wound up, and after opening the door a little, wind-up of the auxiliary spring is stopped, and in the condition that the restoring force is maintained, the main spring is continuously wound up. The door is moved to the closing position by the restoring force of the main spring. Spring force of the main spring 15 is set smaller than that of a spring used for a conventional automatic closing device. The auxiliary spring 16 has the spring force larger than that of the main spring, and when the door comes close to the closing position, the auxiliary spring securely close the door in cooperation with the main spring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door, a folding door, a balance door, etc., which are supported by a hanging vehicle running on a rail to open and close the door. The present invention relates to a door self-closing device for applying a self-closing force to a door.

[0002]

2. Description of the Related Art A self-closing door is configured such that a door is urged in a closing direction by a spring or a weight, and the door is moved in a closing direction by an inclined rail. A device widely known as a spring-type self-closing device includes a rotating drum wound with a wire and a spring such as a mainspring connected between the rotating drum and a spindle of the drum. The wire is connected to the door so that when the door is opened, the wire is rewound from the rotating drum, which causes the drum to rotate and entrain the spring. When closing the door, the drum is rotated in reverse by the restoring force of the spring to wind up the wire and draw the door in the closing direction.

As described above, the spring-type self-closing device winds or winds the spring when opening and closing the door. Is preferred. On the other hand, in order to easily open the door, the opening force is weak, and it is ideal that the opening force rises lower as the door is opened. However, in actuality, as the closing force is increased, the opening force is also increased, and as the opening is increased, the opening force is increased, and the opening cannot be easily performed. For this reason, at present, several types of self-closing devices having different opening / closing forces depending on the use situation are prepared, and the optimum one is properly used among them.

[0004]

The problem to be solved by the present invention is as follows.
In the above-mentioned self-closing device of the spring type of the door, when opening and closing the door, when closing the door, it can be strongly closed just before closing, and when opening, slightly open the door so that it can be opened lightly thereafter. To provide a self-closing device for doors.

[0005]

According to the present invention, in order to solve the above-mentioned problems, an auxiliary spring which is involved only in a certain range when the door is opened and closed is provided in addition to a main spring which is involved in the entire opening and closing section of the door. The closing force of the auxiliary spring and the closing force of the main spring are combined just before the door closes, so that the door can be securely closed. When the door is opened to some extent, the function of the auxiliary spring disappears when the door is opened to some extent. Can be opened lightly to solve the above problem.

That is, according to the present invention, a door is supported by a hanging vehicle running on a rail, and when the door is opened, a wire wound around a rotary drum is rewound from the rotary drum and the rotary drum is opened. A self-closing door wherein the main spring connected between the spindle and the spindle of the drum is wound, and the wire is wound around the rotating drum by the restoring force of the main spring, and the door is moved in the closing direction. A self-closing device for a door is provided, wherein an auxiliary spring is provided so as to rotate the rotary drum in cooperation with the main spring when the vehicle approaches the closed position from the open position. You.

One end of the auxiliary spring is fixed to a holder rotatably mounted on the support shaft, and the other end of the auxiliary spring is fixed to the rotating drum or the support shaft, and the door is moved from the open position to the closed position. The rotation of the retainer is stopped or rotated together with the rotating drum so that the closing force of the auxiliary spring is applied to the main spring when the door approaches, and when the door moves from the closed position to the open position, A self-closing device for a door is provided in which the retainer is rotated or stopped together with a rotary drum so that an opening force of an auxiliary spring acts and thereafter the opening force is not applied to the main spring.

In addition, a roller for controlling the rotation of the retainer as described above, a roller holding plate, a pressing plate pressing body, and a door adjuster provided with a wire adjuster for adjusting the number of turns of the wire are provided. A closing device is provided to solve the above problem.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be applied to an appropriate door mechanism such as a sliding door, a folding door, a balance door, and the like, in which a door is supported by a hanging vehicle running on a rail as described above. In the drawings, an embodiment in which the present invention is applied to a sliding door will be described.

FIG. 1 shows an upper part of a sliding door, and a hanger (2) provided above a door (1) runs on a rail (3) so as to support the door so that it can be opened and closed. A hanging wheel (4) is rotatably mounted. The self-closing device (6) provided in the door pocket (5) of the door and the hanger part of the door (1) are connected by a wire (7). It is configured to be wound up. Even if the self-closing device is provided on the door side and the tip of the wire is provided on the fixed side of the door pocket, the door frame, or the like, almost the same function can be obtained.

Referring to FIGS. 2 and 3, the self-closing device (6)
Has a case body (9) which is attached to a door pocket (5) or the like with attachment legs (8), (8). A support shaft (10) is fixed in the main body (9), and a rotating drum (11) and a retainer (12) are rotatably fitted to the support shaft (10). In the figure, the retainer (12) is inserted between the support shaft (10) and the rotary drum (11), but the mounting position and the position of the rotary drum are set in the axial direction of the support shaft (10). It may be provided shifted.

A receiving groove (13) is provided on the outer periphery of the rotary drum (11), and the wire (7) is wound around the receiving groove (13). The proximal end (not shown) of the wire (7) is connected to the rotating drum (1).
The front end is connected to the hanger (2) of the door (1) preferably through a wire adjuster (14) as described later.

A main spring (15) composed of a spiral spring such as a mainspring is wound around the rotary drum (11) and the support shaft (10) so as to be wound when the wire (7) is unwound from the rotary drum (11). )
Both ends (15a) and (15b) are fixed (FIG. 3 (A)). The main spring (15) reversely rotates the rotary drum (11) by the restoring force, winds the wire (7) around the rotary drum (11), and draws the door (1) in the closing direction.

[0014] The retainer (12) is provided with an aid to rotate the rotary drum (11) in cooperation with the main spring when the door (1) approaches the closed position from the open position. A spring (16) is provided. The auxiliary spring (16) is constituted by a spiral spring such as a mainspring in the figure, but a torsion coil spring, a tension coil spring, or the like can also be used.

As the main spring (15) and the auxiliary spring (16), those having an appropriate spring force are used, but since the main spring (15) acts over the entire opening and closing section of the door, the opening force is reduced. To make it weaker, as shown in FIG.
It is preferable to use a relatively weak spring whose opening force with respect to the opening stroke is smaller than the spring force of the weak spring 18. On the other hand, when closing the door, the auxiliary spring (16) increases the opening force on the opening stroke so that the door can be strongly urged in the closing direction. Good to use.

The auxiliary spring (16) has one end (16a) fixed to the holder (12), while the other end (16b) is fixed to the rotary drum (11) or the support shaft (10). You. In the embodiment shown in FIG. 3 and the like, the other end (16b) is fixed to the rotating drum (11), but in the embodiment shown in FIG. 8, the other end (16b) is
Fixed to 0). Then, as described later, according to the above embodiments, when the door approaches the closed position from the open position, the retainer (12) is connected to the support shaft side or the rotating drum side immediately before closing. The auxiliary spring (1
When the door is moved from the closed position to the open position when the door is slightly opened, the retainer (12) is connected to the rotating drum or the support shaft side, and the auxiliary spring ( 1
6) is deactivated.

The retainer (12) stops rotating when connected to the support shaft (10) side, and rotates together with the rotary drum when connected to the rotary drum (11) side. May be connected to either side by using an appropriate clutch means. The clutch means may be constructed electrically, magnetically or the like, but is preferably constructed so as to be mechanically interrupted by using a roller as described below.

As shown in FIG. 3A, the retainer (12)
A holding hole (20) for holding the roller (19) in a loosely fitted state is formed in the rotary drum (11) and the support shaft (10).
9) and the drum receiving hole (2
1) and a bearing hole (22) are formed. The diameter of the roller (19) is formed larger than the thickness of the cage (12), and the roller (19) fits between the holding hole (20) and the bearing hole (22). When engaged, the retainer (12) is connected to the support shaft side, and when fitted between the retaining hole (20) and the drum receiving hole (21), the retainer (12) is Connected to the rotating drum side.

When the other end (16b) of the auxiliary spring (16) is fixed to the rotary drum (11), the roller operates as shown in FIG. 4 while the rotary drum rotates. FIG. 4 (A)
Indicates a state when the door is started to move from the closed position to the opening direction.In this state, since the roller (19) is still fitted in the bearing hole (22), the cage (12) does not rotate. Then, when the door is moved in the opening direction, the wire is pulled out from the rotating drum, the rotating drum (11) rotates, and the main spring (15) is involved. At this time, since the cage (12) is stopped, the rotating drum (11) and the cage (1) are stopped.
2) The auxiliary spring (16) provided therebetween is in an operating state and is caught by the rotation of the rotary drum. As a result, a large restoring force is stored in each of the main spring (15) and the auxiliary spring (16).

When the door is further opened, as shown in FIG. 4B, a drum receiving hole (21) formed in the rotating drum (11) is lowered.
Approaching the la (19) and passing over the roller (19) (FIG. (C)). At this time, the roller is indicated by an arrow in FIG.
As shown in (23), a force is exerted so as to jump upward, so that the roller gradually enters the drum receiving hole (21) and separates from the bearing hole (22). (D)).

When the roller (19) enters the drum receiving hole (21), the retainer (12) rotates together with the rotating drum (11),
The auxiliary spring (16) is in a non-operating state, is not entangled any more, and is held while maintaining the restoring force. When the door is further opened, the main spring (15)
With the rotation of the rotary drum (11), the drum is further caught and stores a sufficient restoring force for self-closing the door (FIG. (E)).

4 (A) to 4 (E), the change in the opening force acting on the door changes as shown in a to e of FIG. In the part that starts to open from the closed position, a-
As shown in b, until the edge of the drum receiving hole (21) reaches the upper vertex of the roller (19), the combined force of the main spring (15) and the auxiliary spring (16) becomes the opening force.

When the drum receiving hole (21) passes over the upper vertex of the roller (19), the roller (19) starts to enter the drum receiving hole (21) and the spring force of the auxiliary spring (16) Acts as a component force, so that the opening force gradually decreases as shown by bcd.

When the roller (19) is completely separated from the bearing hole (22), the rotating drum (11) and the retainer (12).
Rotate together, the auxiliary spring (16) is deactivated, and only the main spring (15) has a weak opening force.

When closing the door from the open position, FIG.
The closing force changes as shown by ed-c-b-a, and when approaching the closing position, the auxiliary spring (16) is activated and the main spring (1
The door can be closed with a strong closing force due to the combined force of 5) and the auxiliary spring (16).

As described above, when the roller (19) is fitted in the drum receiving hole (21) of the rotary drum (11), as shown in FIG. , A downward force shown by an arrow (24) acts. Therefore, when the rotating drum (11) continues to rotate, the lower apex of the roller (19) passes through the edge of the support hole (22) as shown in FIGS. Roller (1
9) gets into the bearing hole (22). In such a case, the retainer (12) is connected to the support shaft (10) side, and the rotation stops, so that the auxiliary spring (16) is re-engaged, and the opening force becomes excessive. . Therefore, when the door is moved from the closing position to the opening direction, the rotary drum rotates, and as shown in FIGS.
When the door is opened further and the rotating drum rotates, the roller (19) is configured so as not to fit into the bearing hole (22), and when closing the door, the roller (19) is closed. The roller (19) must be configured to fit into the bearing hole (22) in one rotation.

In the embodiment shown in FIG.
The roller presser plate (25) for controlling the movement of the roller so as to hold the roller (19) at the position where the (16) is deactivated, and the auxiliary spring (16) are activated. Roller (19)
A pressing plate pressing body (26) for moving the roller pressing plate (25) so that the roller can move.

As shown in FIG. 3 (B), the roller holding plate (25) has a holding plate receiving groove (2) formed in the rotary drum (11).
7) has an arc-shaped cam surface (28) slidably provided in the roller (19), and the cam surface (28) is provided on the roller (19).
Is urged by a spring (30) in the direction of the arrow (29) so as to contact with. The outer side surface (31) of the roller holding plate (25) is formed in an arc surface, and the inner side surface (32) is provided with a stopper pin when moving leftward in the drawing.
A contact surface is formed so as to contact (33). The length of the outer surface may be a length that allows the rotation of the rotating drum within the range shown in FIG.

The pressing plate pressing body (26) is provided at an extruding rod (34) that can contact the outer surface (31) of the roller pressing plate (25), and is provided at a rear end of the extruding rod (34). And a spring (37) for urging the push rod (34) outward until the stopper (35) hits the wall (36). Then, when the door approaches the closed position, the push rod (34) enters the main body (9) through the hole (38) of the case main body (9), and the roller holding plate (25) is moved. In the figure, it is provided on a holding plate (39) connected to the hanger portion of the door.

The presser plate pressing body (26) moves away from the case body (9) by moving the door in the opening direction from the state of the closed position of the door shown in FIG. 3 (B). Therefore, the roller holding plate (25) moves rightward in the drawing by the action of the spring (30). As a result, FIG.
In (B), the cam surface (28) remains in contact with the roller (19). However, when the roller (19) starts to enter the drum receiving hole (21), FIG. The cam surface (28) is always in contact with the roller (19) by moving in the direction of the arrow (29) as shown in FIG. This prevents the roller (19) from entering the bearing hole (22) again as shown in FIG. 4 (D). As a result, the roller (19) does not enter the bearing hole (22) even if the rotating drum makes one or more rotations.
Can be kept inactive.

When the door is closed from the open position, the pushing rod (34) of the pressing plate pressing body (26) is pressed when approaching the closed position.
Hits the outer side surface (31) of the roller holding plate (25), and moves the roller holding plate (25) to the left. Thereby, the above FIG.
The roller holding plate (25) returns from the position indicated by the two-dot chain line to the position indicated by the dotted line, and as shown in FIGS. (D), (C), (B) and (A), (19) can be gradually inserted into the bearing hole (22), and the auxiliary spring (16) can be activated.

FIG. 8 shows the other end (16b) of the auxiliary spring (16).
When the roller is fixed to the support shaft (10), the roller moves during one rotation of the rotary drum. When the door is in the closed position, the rollers (19) rotate the rotating drum (11).
Of the drum (21) and the holding hole (20) of the holder (12), the holder (12) can rotate together with the rotary drum (11), and the auxiliary spring (16) Is in operation. In this state, when the door is moved in the opening direction, the rotating drum (11) and the retainer (12) rotate, and the main spring (15) and the auxiliary spring (16)
Are respectively caught and the restoring force is accumulated (FIG. 8).
(A)).

Further, the rotating drum (11) rotates, and
When the lower apex of the bearing (19) exceeds the edge of the bearing hole (22),
The lug (19) fits into the bearing hole (22), and the rotation of the cage (12) stops (FIG. (B)). The auxiliary spring (16) is held in a non-operating state with the restoring force stored therein, and when the rotating drum (11) is further rotated, the main spring (15) is further entrained and stores the restoring force (FIG. C)).

If the rotary drum (11) continues to rotate further, the roller (19) will fit in the drum receiving hole (21) again. A roller presser plate and a presser plate presser (not shown) for controlling the movement of the roller almost in the same manner as the plate presser are combined with the above-mentioned roller and door. In this case, the cam surface of the roller pressing plate is a cam surface that regulates the roller from engaging with the drum receiving hole even if the rotating drum further rotates from the state shown in FIG. (Not shown).

Also in the embodiment shown in FIG. 8, when the door is moved from the open position to the closing direction, the rotary drum rotates in the reverse direction, and when approaching the closed position, the auxiliary spring (16) is in the non-operating state. From the state of operation, and e-d-c-b-
The closing force changes as in a, and the door can be closed with a strong closing force.

FIGS. 4A to 4D and FIGS. 8A and 8B.
As shown in the above, when the door is moved from the closed position to the door opening direction, the roller (19) moves from the support hole to the drum receiving hole or from the drum receiving hole when the door is moved from the closed position to the door opening direction. Since it is accumulated until it moves to the support hole, it changes depending on the rotation angle of the rotating drum during this time. The rotation angle of the rotating drum during this time varies depending on the position from which the position of the drum receiving hole of the rotating drum starts when the door is opened. Can be adjusted by changing.

To change the number of turns of the wire, a wire adjuster (14) is provided at the end of the wire (7) as shown in FIG.
The number of turns (length) of the wire (7) wound around the rotating drum (11) may be adjusted by the wire adjuster (14). FIG.
(A) shows an embodiment of the wire adjuster (14),
(2) Substrate attached to an appropriate part such as holding plate (39) or the like
(40) a pin locking plate (42) having a number of recesses (41) on the periphery
And a take-up disc (44) is provided on the side of the pin locking disc (42) so as to be rotatable by a shaft (43). The winding machine (44) has a notch (45) for fixing the end (7a) of the wire (7), a groove (46) around which the wire (7) is wound, and a recess of the pin locking machine (42). It has a pin (47) protruding in the direction engaging with (41). The winding machine (44) penetrates the shaft (43) through the board (40), engages the pin (47) with the appropriate recess (41) of the locking board (42), and engages the nut (48). The pin lock plate (42)
Is fixed in a non-rotating state. To change the position of the drum receiving hole of the rotating drum, loosen the nut (48) and move the winder (44) to the side to disengage the pin (47), and move the winder ( Adjust the amount of wire wound around the groove (46) by rotating (44), and when the rotating drum rotates to the set position,
The (44) is pulled in the direction of the pin lock plate (42), the pin (47) is aligned with the recess (41), and is prevented from rotating, and then tightened with the nut (48).

The above rotary drum (11) is used for abc-
In order to confirm the position of de, for example, an identifier (49) such as an appropriate color-coded display is provided on the side surface of the drum, and this is provided in a window (50) (FIG. 9 (C)).

[0039]

According to the present invention, the door is moved from the closed position to the opening direction to rotate the rotary drum to entrain the main spring and the auxiliary spring, and after the door is opened to a certain extent, the door is opened. The entrainment of the auxiliary spring is stopped, the restoring force is maintained, and in the subsequent movement in the opening direction, only the main spring is continuously entrained, and the rotating drum is reversed by the restoring force of the main spring. The door is moved in the closing direction, and when the door approaches the closed position from the open position, the auxiliary spring acts to rotate the rotary drum in cooperation with the main spring. The spring can use a weaker spring than the spring of the conventional self-closing device, the door can be opened with a light force after stopping the entrainment of the auxiliary spring, and when closing the door,
The auxiliary spring operates near the closed position, and the door is securely closed by the strong closing force combined with the main spring. In addition, by adjusting the number of windings of the wire, a wide closing force can be obtained in one model. Can also be supported.

[Brief description of the drawings]

FIG. 1 is a front view of an upper portion of a door when closed.

FIG. 2 is a sectional view showing an embodiment of the self-closing device of the present invention.

3A and 3B mainly show a configuration of a rotary drum, FIG. 3A is an explanatory view in the direction of line AA in FIG. 2, and FIG. 3B is an explanatory view in the direction of line BB in FIG.

FIGS. 4A to 4E are explanatory views of a retainer, a roller, and the like, which move while the rotary drum rotates.

FIG. 5 is a graph showing a change in an opening force by a main spring and an auxiliary spring.

FIGS. 6A to 6C are explanatory diagrams in a case where the rotating drum is rotated one or more times without controlling the movement of the roller.

FIGS. 7A and 7B are explanatory diagrams of forces acting on rollers.

FIG. 8 shows another embodiment of the present invention, in which (A) to (C)
4 is an explanatory view of a retainer, a roller, and the like that move while the rotary drum rotates.

9A and 9B mainly show a wire adjuster, FIG. 9A is a cross-sectional view, FIG. 9B is an explanatory view of a part of a pin locking plate, and FIG.
FIG.

[Explanation of symbols]

 6 Self-closing device 7 Wire 10 Support shaft 11 Rotary drum 12 Cage 14 Wire adjuster 15 Main spring 16 Auxiliary spring 19 Roller 20 Holding hole 21 Drum receiving hole 22 Support bearing hole 25 Roller holding plate 26 Pressing plate press body

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Junichi Sunagawa 3-37-38 Kanda Sakuma-cho, Chiyoda-ku, Tokyo Inside Nakanishi Sangyo Co., Ltd.

Claims (6)

[Claims] A door is supported by a hanging vehicle traveling on the rail, and when the door is opened, a wire wound around a rotating drum is rewound from the rotating drum and a support between the rotating drum and the rotating drum is provided. A self-closing door in which a main spring connected between the shafts is wound and the wire is wound around a rotating drum by the restoring force of the main spring and the door is moved in a closing direction, wherein the door is moved from an open position. A self-closing device for a door, wherein an auxiliary spring is provided to rotate the rotary drum in cooperation with the main spring when approaching a closed position. 2. A retainer is rotatably mounted on a spindle of the rotary drum, and one end of the auxiliary spring is fixed to the retainer, and the other end of the auxiliary spring is fixed to the rotary drum or the spindle. When the door approaches the closed position from the open position, the retainer is connected to the support shaft side or the rotating drum side to activate the auxiliary spring, and when the door moves from the closed position to the open position. 2. The self-closing device for a door according to claim 1, wherein the retainer is connected to the rotary drum side or the support shaft side after the door has slightly moved in the door opening direction, so that the auxiliary spring is deactivated. 3. The retainer is inserted between the rotary drum and a spindle, and a roller is provided in a retaining hole provided in the retainer. 3. The self-closing device for a door according to claim 2, wherein a drum receiving hole and a bearing hole are formed so as to support the roller between the cage and the retainer. 4. When the door is moved from the closed position to the open direction, the roller is moved from the bearing hole side to the drum receiving hole side or from the drum receiving hole side to the bearing hole side, and the auxiliary spring is moved. 4. The self-closing device for a door according to claim 3, further comprising a roller holding plate for controlling the movement of the roller so as to make the roller inactive. 5. The door for a door according to claim 4, further comprising a presser plate pressing body for moving the roller presser plate so as to activate the auxiliary spring when the door approaches the closed position from the open position. Self-closing device. 6. The self-closing device for a door according to claim 1, wherein a wire adjuster for adjusting the number of turns of the wire is provided at an end of the wire.