JPH0663402B2 - Hinge device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hinge device for automatically closing a rotary door used for a door, a gate, and the like.

<Conventional technology and its problems> Generally, high-pressure gas or hydraulic pressure is used as power for a door closer that automatically closes a door. 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. Further, gas and oil have large thermal expansion, and a door closer using the same has a large temperature output when the environmental temperature becomes high, and a small output when the environmental temperature becomes low, so that a stable output cannot be obtained. Further, since the closing speed of the door is adjusted by changing the cross-sectional area of the gas or oil outlet, accessory parts such as a valve mechanism and an orifice are also required.

In order to eliminate such drawbacks, door closers using springs such as torsion springs have been conventionally developed, but spring type door closers have the following problems, making it difficult to put them 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.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems of a spring door closer and to provide a hinge device capable of adjusting spring force and door speed.

<Means for Solving Problems> For the above object, the present invention relates to a hinge device in which one hinge rotates with respect to another hinge and automatically returns by a return spring, and the hinge device rotates together with the one hinge. The side member and the fixed side member are arranged to face each other, and viscous grease is interposed in the facing portion, and the hook portion at one end is locked to the other hinge and the hook portion at the other end is locked to the releasing member. The locking means, which is provided in close contact with the fixed side member and is made up of a clutch spring capable of adjusting the spring force of the return spring, locks the rotation of the fixed side member and further operates the release member to cause the clutch. The lock of the fixed side member by the spring is released.

<Operation> When one hinge rotates, the return spring accumulates rotational torque in the counter-rotational direction. Therefore, although the one hinge automatically returns to the opposite direction, a shearing force acts on the viscous grease interposed between the rotating-side member and the fixed-side member at the center of rotation and resists this shearing force. It rotates at a slow speed to return. On the other hand, the return spring is unlocked by the lock means consisting of a clutch spring capable of adjusting the spring force, and the fixed side member is rotated to tighten the return spring. Done. Therefore, the rotation speed of the one hinge can be adjusted by the return spring.

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

FIG. 1 is a vertical sectional view of an embodiment of the present invention, and FIG. 2 is a front view thereof. Both are hollow cylinders, one hinge 1 and the other hinge 2
And are butted against each other via the spacer 3, and these hinges 1,
A return spring 4, a pair of shafts (rotating member) 5 and a shaft (fixing member) 6 are inserted in the space formed by 2. A tubular body 7 is inserted in the pair of hinges 1 and 2 in the axial direction, and one hinge 1 rotates relative to the other hinge 2 about the tubular body 7. The hinges 1 and 2 each have a bracket extending in the radial direction, and the brackets 1a and 2b each have a screw hole formed therein. Therefore, by screwing the bracket 1a of the one hinge 1 to the door (not shown) and the bracket 2b of the other hinge 2 to the door frame (not shown), the one hinge is opened and closed with the door. 1 rotates with respect to the other hinge 2.
The return spring 4 accumulates rotational torque by rotating the hinge 1 in one direction to return the hinge 1 in the opposite direction. In this embodiment, a torsion spring is used, and its coil portion is externally inserted to the pair of shafts 5 and 6, and the hook portion 4a at one end is inserted into the locking hole at the top of the one hinge 1, and the other end is The hook portion 4b is inserted into the locking hole 6a formed in the shaft 6. Shaft 6 here
Is in a rotationally locked state by a lock means capable of adjusting the spring force of a return spring 4 including a clutch spring 8 described later. Therefore, when the hinge 1 rotates, the return spring 4 is wound and the torque for rotating the hinge 1 in the opposite direction is accumulated.

Both the pair of shafts 5 and 6 are axially inserted into the hinges 1 and 2. Among these, one shaft 5 is formed in a vertically long inverted truncated cone shape, and the other shaft 6 is formed in a vertically long slender bowl shape.
Is inserted, the pair of shafts 5 and 6 are arranged so as to face each other. Further, viscous grease (not shown) is interposed in the facing portion, and a shearing force acts on the relative rotation of the shafts 5 and 6 to provide resistance to the relative rotation. Here, as the viscous grease, a silicone-based grease or the like, which has small changes in physical properties with temperature and has durability, is selected. The one shaft 5 is designed to rotate integrally with the one hinge 1. Therefore, the one shaft 5 is attached to the one hinge 1 with its rotation restricted by a double nut, a screw lock material, or a one-way clutch. To be The upper end of the one shaft 5 is pulled out by the top of the one hinge 1, and a male screw 9 is engraved on the outer peripheral surface of the upper end. On the other hand, a nut 10 with which this male screw 9 is screwed is integrally attached to the top of one hinge 1. Therefore, when the male screw 9 is rotated, the one shaft 5 moves up and down with respect to the other shaft 6, thereby changing the gap between the facing portions in which the viscous grease is interposed. As a result, the effective resistance of the viscous grease changes, so that the shearing force of the viscous grease against the return spring 4 is adjusted, and the return rotational speed of the one hinge 1 can be adjusted. The lower end portion of the other shaft 6 penetrates the bottom surface of the other hinge 2 and extends downward, and the clutch spring 8 is attached to this extending portion.

The clutch spring 8 constituting the locking means capable of adjusting the spring force of the return spring 4 is a torsion spring having a rectangular cross section, and this coil portion is externally inserted to the other shaft 6 portion and the hook portion 8a at one end is used. Is inserted in the bottom surface of the other hinge 2, and the hook portion 8b at the other end is locked by a lock releasing collar 11 as a releasing member described later. The coil portion of the clutch spring 8 is wound in a direction opposite to the winding direction of the return spring 4 and is wound such that its inner diameter is slightly smaller than the diameter of the other shaft 6 in a free state. . Therefore, the clutch spring 8
When the outer diameter of the coil is increased to some extent on the other shaft 6, the clutch spring 8 is closely attached to the other shaft 6 and tightens the other shaft 6 to prevent the rotation of the other shaft 6. Locked. In this case, a square hole 12 is formed on the bottom surface of the other shaft 6, and the square hole 12 is formed.
When a tool such as a square wrench is inserted into 12 and a force is applied in the winding direction (diameter expansion direction) of the clutch spring 8, the frictional force between the clutch spring 8 and the other shaft 6 decreases and slippage occurs. The resulting shaft 6 rotates in the same direction. This rotation direction is the winding direction of the return spring 4, and the hook portion 4b at the other end of the return spring 4 has the shaft 6
The return spring 4 is tightened by being wound on the return spring 4 and its torque is adjusted. Since such torque adjustment is continuously performed with respect to the return spring 4, fine adjustment can be performed steplessly. Even if the operating force is released during this adjustment, the clutch spring 8 immediately recovers its diameter and tightens the shaft 6, so that the shaft 6 is automatically locked. The unlocking collar 11 is the other shaft 6
Is rotatably externally attached to the lower portion of the clutch spring and the hook 8b at the other end of the clutch spring is inserted. When the unlocking collar 11 is rotated in the winding direction of the clutch spring 8 in this state, the coil diameter of the clutch spring 8 is increased and the tightening on the other shaft 6 is eliminated. Rotation is free. In this unlocked state, the torque of the return spring 4 causes the other shaft 6 to rotate and the return spring 4 to rotate.
Since the torque is released, if excessive winding tightening is performed by the above-described winding tightening adjustment of the return spring 4, it can be restored.

With the above-mentioned structure, the operating member is incorporated in the pair of hinges 1 and 2, and the whole is compact. Therefore, one hinge 1 bracket can be screwed directly to the door and the other hinge 2 bracket 2b can be screwed directly to the door frame to form a hinge serving as the center of rotation of the door. In this attached state, the other hinge 2 on the door side that rotates the door rotates, and rotational torque is accumulated in the return spring 4, so that the door automatically rotates in the closing direction. One shaft 5 in this rotation
Rotates integrally with the other hinge 2 and a shearing force acts on the viscous grease enclosed between the other hinge 6 and the other shaft 6, so that the door rotates in the closing direction at a slow speed.

<Effects of the Invention> As described above, according to the present invention, the rotation of the fixed member is locked by the locking means formed of the clutch spring provided between the other hinge and the release member, and the return spring is tightened. Since the spring force is adjusted, the torque of the return spring can be finely adjusted very easily in a stepless manner, and the release member is operated to instantaneously release the torque when the return spring is excessively tightened. Since it can be performed and restored, the spring force of the return spring can be adjusted with extremely good operability.

Further, since the speed of the closing operation of the door is adjusted by the torque of the return spring and the shearing force of the viscous grease interposed between the rotating side member and the fixed side member, the speed can be finely adjusted. Since the whole is made compact, it can be mounted between the door and the door frame.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention, and FIG. 2 is a front view thereof. 1 ... One hinge, 2 ... Other hinges, 4 ... Return spring, 5 ... One shaft (rotating side member), 6 ... Other shaft (fixed side member), 8 ... Clutch spring ( Locking means).

Claims (1)

[Claims] 1. In a hinge device in which one hinge rotates with respect to another hinge and is automatically returned by a return spring, a rotating side member and a fixed side member that rotate together with the one hinge are arranged to face each other. The viscous grease is interposed in the facing portion, the hook portion at one end is locked to another hinge, and the hook portion at the other end is locked to the release member, and the return member is provided in close contact with the fixed side member. Locking rotation of the fixed-side member is locked by a locking means composed of a clutch spring that can adjust the spring force of the spring,
Moreover, the hinge device is configured such that when the releasing member is operated, the lock of the fixed side member by the clutch spring is released.