JPH0765428B2 - Auto Closer - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic closer that automatically closes a rotated member represented by a door or a gate.

[Prior Art and its Problems] Generally, high pressure gas or hydraulic pressure is used as the power of an auto closer that automatically closes a door or the like. The door of this type requires a highly accurate sealing mechanism to prevent leakage of gas and oil, and precision processing and assembly of parts are indispensable. Also, gas and oil have large thermal expansion,
The autocloser using this has a temperature dependency in which the output increases when the environmental temperature rises and decreases when the environmental temperature falls, and a stable output cannot be obtained. Furthermore, since the closing speed of the door is adjusted by changing the cross-sectional area of the gas or oil outlet, valve parts and accessories such as orifices are also required.

In order to eliminate such drawbacks, an auto closer using a spring such as a torsion spring has been conventionally developed. However, the spring type auto closer has the following problems, which makes it difficult to put it into practical use.

 It is difficult to finely adjust the load acting on the spring.

The closing operation speed of the door due to the spring force cannot be adjusted to a slow speed.

Since a mechanism for stopping the opening of the door at an arbitrary angle is not provided, a member such as a wedge or sleeper is required to open the door.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems of a spring type automatic closer and to provide an automatic closer capable of adjusting the spring force, the speed of the door and the opening angle of the door.

[Means for Solving the Problems] For the above-mentioned purpose, the present invention provides a rotation-side member provided so as to face the fixed-side member locked to rotate and the fixed-side member connected to the rotated member. A viscous grease interposed between the fixed side member and the rotating side member facing each other, and a viscous grease wound by the rotation of the rotating side member to bias the rotating side member in the opposite direction and lock the fixed side member. A return spring that enables winding tightening adjustment by releasing, and a stopper mechanism that is provided on the fixed-side member and the rotating-side member and that engages with each other to stop the rotation of the rotating-side member at a predetermined angle, The stopper mechanism is integrally fixed to the rotary member,
It is characterized in that it is composed of an annular cam having a concave portion formed at an appropriate position on the inner peripheral surface so as to face each other, and a stopper spring provided on the fixed side member so as to be inscribed in the cam.

Further, the stopper spring is screwed to the fixed member so that the position of the stopper spring can be adjusted.

[Operation] Since the present invention is configured as described above, the return spring acts to return-rotate the rotary member, and the viscous grease acts to reduce the rotational speed of the rotary member by the shearing force. Further, the return spring adjusts the torque acting on the rotary member by the winding tightening adjustment. Therefore, the rotation speed of the rotated member can be adjusted by interposing the viscous grease and adjusting the return spring.

On the other hand, the stopper mechanism acts to stop the rotation of the rotary member, that is, the opening of the rotated member at a constant angle.

This stop angle can be adjusted by adjusting the position of the stopper spring.

[Examples] Hereinafter, the present invention will be specifically described with reference to the illustrated examples.

1 is a sectional view of the present invention, FIG. 2 is a bottom view thereof, FIG. 3 is a side view, FIG. 4 is a plan view, and FIGS. 5 (a) and 5 (b) are plan views and cross sections of the upper part of the shaft. It is a figure.

In the casing 1 having a hollow inside, the fixed-side member 4
The rotary member 5 and the return spring 6 are inserted. The casing 1 is fixed to the revolving door, and the mounting flanges 2 are projected from both sides.
Each mounting flange 2 is provided with a mounting hole 3 which is bolted to a mounting member (not shown) of a rotated member such as a door. The fixed member 4 is inserted into the casing 1 in a rotation-locked state, and this rotation-locking is performed by a lock mechanism 7 described later. The fixed-side member 4 includes a central small-diameter shaft portion 4a extending in the longitudinal direction, a cylindrical portion 4b provided concentrically with the small-diameter shaft portion 4a, and a large-diameter shaft portion 4c extending downward from the small-diameter shaft portion 4a. A flange portion 4d that is integrally formed and that extends in the circumferential direction and contacts the inner surface of the casing 1 is formed. Where small diameter shaft 4a
The upper end of the casing is extracted above the upper end of the casing 1, and a male screw 8 is engraved on the outer peripheral surface of the upper end. Further, a vertical hook groove 9 is formed on the flange portion 4d, and a square hole 12 into which a tool such as a square wrench is inserted is formed on the lower surface of the large diameter shaft portion 4c.

The rotary member 5 is integrally formed with a head portion 5a and a leg portion 5b extending downward from the head portion 5a. The leg portion 5b has a tubular shape with an axial insertion hole formed therein, and the small diameter shaft portion 4a of the fixed-side member 4 is inserted into the insertion hole, whereby the rotation-side member 5 has a small diameter shaft portion 4a. It is rotatably supported around. In this supporting state, the leg portion 5b of the rotating side member 5 faces the tubular portion 4b of the fixed side member 4 with a predetermined gap, and the facing portion is filled with the viscous grease 10 and interposed.
Here, the viscous grease 10 has little change in physical properties due to temperature,
Moreover, a durable silicone grease is selected. A link 5c extending in the lateral direction is integrally formed on the head 5a of the rotating member 5, and the link 5c rotatably supports a rotatable member such as a door via a connecting link 11. It is connected to a supporting member (not shown) such as a door mounting frame. Therefore, the rotating member 5 and the supporting member of the rotated member are connected by the connecting link 11, and when the door is opened, the rotating member 5 connects the small diameter shaft portion 4a of the fixed member 4 via the connecting link 11. The torque that rotates in the center and rotates the door in the closing direction is accumulated in the return spring 6 described later. Reference numeral 15 is a hook groove formed on the lower surface of the head portion 5a of the rotary member 5.

The return spring 6 is a torsion spring having a rectangular cross section, and its coil portion is externally inserted into the tubular portion 4b of the fixed-side member 4,
The hook 6a at one end is inserted and locked in the hook groove 9 formed in the fixed-side member 4, and the hook 6b at the other end.
Is inserted into and locked by the hook groove 15 formed in the rotary member 5. The coil portion is wound in the direction opposite to the rotation of the rotating member 5 when the door is opened, and when the fixed member 4 is rotation locked, that is, in the stopped state, the rotating member 5 rotates following the door opening. The return spring 6 is wound and tightened, and the return spring 6 accumulates a torque for urging the rotation-side member 5 to rotate in the opposite direction.

The rotation locking of the fixed side member 4 is performed by the lock mechanism 7 wound around the large diameter shaft portion 4c of the fixed side member 4. The lock mechanism 7 is a torsion spring having a rectangular cross section, and is wound so that the coil diameter of the coil portion is smaller than that of the large diameter shaft portion 4c in the free state. Also, the hook part at this end
7a is adapted to be locked in a hook groove 16 formed on the inner surface of the casing 1. When the coil diameter is made slightly larger, the coil 7a is externally mounted on the large-diameter shaft portion 4c of the fixed-side member 4 so as to be locked. Since 7 tightens the large-diameter shaft portion 4c of the fixed-side member 4, the rotation of the fixed-side member 4 is locked. Here, the lock mechanism 7
Is wound in a direction opposite to the winding direction of the return spring 6, and a tool is inserted into the square hole 12 of the fixed side member 4 to apply a force in the winding direction (expanding direction) of the lock mechanism 7. When,
The frictional force between the lock mechanism 7 and the large-diameter shaft portion 4c decreases, causing slippage, and the fixed-side member 4 rotates in the same direction. This rotation direction is the tightening direction of the return spring 6, and the hook 6a at one end of the return spring 6 is fixed to the stationary member 4
Since the return spring 6 is locked to, the return spring 6 is wound and tightened, and its torque is adjusted. Even if the operating force is released during this adjustment, the locking mechanism 7 immediately restores the diameter and tightens the large-diameter shaft portion 4c of the fixed-side member 4, so that the fixed-side member 4 is automatically locked. Further, a cylindrical unlocking collar 17 is rotatably fitted to the bottom of the casing 1, and a hook 7b at the other end of the lock mechanism 7 is locked to the unlocking collar 17. Further, an arcuate notch 18 which allows the hook 7b at the other end of the lock mechanism 7 to slide is formed on the bottom surface of the casing 1, and when the unlock collar 17 is rotated in the direction of the arrow in FIG. Mechanism 7
The other end of the hook 7b slides in the same direction. As a result, the coil diameter of the lock mechanism 7 is expanded and the fixed side member 4 is not tightened to the large-diameter shaft portion 4c, so that the rotation lock is released and the fixed side member 4 is in a freely rotatable state. Therefore, in this unlocked state, the fixed side member 4 is rotated by the torque of the return spring 6 and the torque of the return spring 6 is released. Therefore, excessive tightening is performed by the above-described tightening adjustment of the return spring 6. In that case, the restoration is possible.

Further, an adjusting nut 37 is screwed onto the male screw 8 of the fixed member extracted from the upper end of the casing 1. When the adjusting nut 37 is rotated in this state, the nut 37 moves the shaft 4 up and down in the axial direction to move the viscosity between the tubular portion 4b of the fixed-side member 4 and the leg portion 5b of the rotating-side member 5. Grease 10
Since the effective resistance of the viscous grease changes, the shearing force of the viscous grease 10 against the return spring 6 is adjusted to enable the closing operation speed of the door.

A stopper mechanism 30 is provided above the fixed-side member 4 and the rotating-side member 5. The stopper mechanism 30 rotates the rotary member 5, that is, an annular cam 32 integrally formed on the upper portion of the head 5a of the rotary member 5, and a cam 32 attached to the upper end surface of the fixed member 4. And a stopper spring 31 inscribed in the. The cam 32 has a recess 33 formed at an appropriate position so as to face the cam 32, and rotates integrally with the rotary member 5. Also, stopper spring
Reference numeral 31 is a leaf spring whose both ends are curved downward, and projections 34 that fit into the recesses 33 of the cam 32 are formed at both ends. Therefore, when the cam 32 rotates integrally with the rotary member 5 and the concave portion 33 reaches the convex portion 34 of the stopper spring 31, the concave portion 33 is fitted into the convex portion 34 of the stopper spring 31. As a result, the rotation of the rotary member 5 is stopped, and the door remains open at that position. In this case, the stopper spring 31, as shown in FIG.
It is mounted by a mounting screw 35 screwed to the upper end surface of the fixed-side member 4, and the head of this mounting screw 35 is formed in a gear shape, and the stopper spring 31 is fitted to the gear-shaped head by serration. It is like this. Therefore,
Since the serration fitting position of the stopper spring 31 can be adjusted, the open state of the door can be changed to an arbitrary position. Note that the stopper spring 31 is fixed by fitting the stopper spring 31 to the head of the mounting screw 35 by serration and then screwing it into the female screw portion 35a of the mounting screw 35.
It is done by screwing 6 together. In order to release the unlocked state of the door, it is sufficient to push the door in the opening direction or the closing direction with a strong force.
And the cam 32 are disengaged and the door rotates in the same direction.

In this embodiment as described above, the mounting flange 2 is bolted to fix the casing 1 to the door, and the rotating side member 5 is used.
Is attached to the support member of the door via the connecting link 11. Then, the tool is inserted into the square hole 12 of the fixed-side member 4 to rotate the fixed-side member 4 in the winding direction of the return spring 6, but this rotation direction is the direction in which the diameter of the lock mechanism 7 is expanded. The side member 4 rotates in the same direction. Therefore, the return spring 6 in which the hook 6a at one end is locked to the fixed member 4 is tightened, and the initial torque is applied. If excessive tightening is performed during this operation, the lock release collar 17 is rotated in the direction of the arrow in FIG.
It suffices to enlarge the diameter and release the lock, whereby the fixed side member 4 rotates in the opposite direction by the torque of the return spring 6 and the torque is released. In this case, the resistance of the viscous grease 10 can be adjusted by rotating the adjusting nut 37, which allows the door closing speed to be finely adjusted. When the door is opened after such adjustment, the rotating member 5 rotates following the opening of the door. Then, the return spring 6 is tightened by the rotation of the rotation side member 5, and torque is accumulated. During the closing operation of the door, the door automatically rotates in the closing direction by the torque accumulated in the return spring 6. At the time of this rotation, the rotating side member 5 rotates and the fixed side member 4 locked against rotation is rotated. A shearing force acts on the viscous grease 10 interposed therebetween, whereby the door is closed at a slow speed.

When the door is opened and closed, the open state of the door is
The stopper mechanism is maintained in a predetermined open state.

[Advantages of the Invention] As described above, according to the present invention, the tightening adjustment of the return spring is performed by the rotation operation of the fixed member, so that the torque of the return spring can be finely adjusted. , The speed of the closing operation of the door can be easily adjusted by the shearing force of the viscous grease interposed between the rotating side member and the fixed side member, and the opening state of the door can be maintained by providing the stopper mechanism. effective.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, FIG. 2 is a bottom view thereof, FIG. 3 is a side view thereof, FIG. 4 is a plan view thereof, and FIG.
Drawing (a) and (b) is a top view of a head of a fixed side member, and its sectional view. 1 ... Casing, 4 ... Fixed side member, 5 ... Rotation side member, 6 ... Return spring, 10 ... Viscous grease, 30 ... Stopper mechanism.

Claims (2)

[Claims] 1. A fixed-side member whose rotation is locked, a rotary-side member that is provided so as to face the fixed-side member connected to a rotated member, and a fixed-side member and a rotary-side member that face each other. A viscous grease interposed in the portion, a return spring that is wound by the rotation of the rotating side member to urge the rotating side member to rotate in the opposite direction, and the winding tightening can be adjusted by unlocking the fixed side member, A stopper mechanism that is provided on the fixed-side member and the rotating-side member and that engages with each other to stop the rotation of the rotating-side member at a predetermined angle; and the stopper mechanism is integrally fixed to the rotating-side member. Is
An auto closer comprising an annular cam having a concave portion formed at an appropriate position on the inner peripheral surface so as to face each other, and a stopper spring provided in a fixed side member so as to be inscribed in the cam. 2. The automatic closer according to claim 1, wherein the stopper spring is screwed to the fixed member so that the position of the stopper spring can be adjusted.