JPH0743479U - Automatic return hinges for doors, etc. - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is capable of easily suspending a heavy door without causing a wide gap between the door frame and the door frame so that the door can be opened and closed smoothly and smoothly. The object of the present invention is to obtain an automatic return hinge that can improve the work efficiency and can adjust the return position of the door to be selectively settable. [Structure] A rotary cam barrel is rotatably fitted in a pivotal fitting attached to the door side, and a sliding cam barrel urged in a contact state with the rotary cam barrel is vertically movable. A polygonal shaft that is slidably inserted in the rotating cam barrel and the sliding cam barrel in the axial direction and rotates integrally with the rotating cam barrel is urged to project above the pivotal fitting so that the polygonal polygon This is formed by inserting the tip of the shaft into a polygonal hole of a support fitting attached to the door frame so that the return position of the door can be selectively set.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic return hinge in which a door or the like that can be automatically opened and closed can be mounted quickly and easily, and a return position of the door can be selectively set.

[0002]

[Prior art]

 Conventionally, as this type of hinge mechanism, a spring hinge using the twisting action of a coil spring and a gravity hinge using a cylindrical cam are known.

[0003]

[Problems to be solved by the device]

 However, the former spring hinge uses the twisting action of the coil spring, and its elastic restoring force is strong and the return speed of the door is fast, so there is a risk of being caught or hit by the door and causing unexpected damage. To prevent this, the twist of the coil spring is adjusted, but the adjustment is extremely complicated and the door may not be able to be restored to the specified position, or the coil spring may tear and may be damaged. There was no nature. In addition, the latter graviity hinge is one in which the door rises up the inclined surface of the cylindrical cam and rotates and descends due to the weight of the door. Moreover, since the entire weight of the heavy door is added to the inclined surface of the cylindrical cam, the inclined cam surface is easily worn and lacks durability. In view of the above-mentioned conventional problems, the present invention has been made in order to solve the above problem, and a heavy door can be smoothly and smoothly rotated to open and close automatically. The purpose of the invention is to obtain an automatic return hinge that can be easily hung up without the need to install it, which can improve the efficiency of installation work, and which can adjust the return position of the door selectively. .

[0004]

[Means for Solving the Problems]

 As a means for achieving this, the present invention relates to a sliding cam cylinder in which a rotary cam cylinder is rotatably fitted in a pivotal fitting attached to a door side and is always urged into contact with the rotary cam cylinder. Is inserted so that it can move up and down, and it is slidably inserted in the rotating cam barrel and the sliding cam barrel in the axial direction, and the polygonal shaft that rotates integrally with the rotating cam barrel is projected above the pivot fitting. And the tip of the polygonal shaft is inserted into a polygonal hole of a support fitting attached to the door frame side so that the return position of the door can be selectively set.

[0005]

【Example】

 The configuration of the present invention will be described in detail below with reference to an embodiment shown in the drawings. The door A is provided so as to be openable and closable by mounting the upper suspension 1 on the upper side between the door frame B and the lower suspension 9 on the lower side. The upper suspension 1 is composed of a pivot metal fitting 2 attached to the door A side and a support metal fitting 8 attached to the door frame B side. The pivot metal fitting 2 has a fitting portion 22 vertically provided on a mounting portion 21 having a screw mounting hole for fixing to the door A, and a through hole having a flange 23 formed at the upper end of the fitting portion 22. 24, a screw 25 for screwing a ring cap 27 is screwed on the lower end, and a vertical guide groove 26 is formed on the lower half of the inner surface so as to face each other. A movable cam barrel 3, a sliding cam barrel 4, a polygonal shaft 5, a large diameter coil spring 6, and a small diameter coil spring 7 are incorporated in the fitting portion 22. The movable cam cylinder 3 is formed as a polygonal hole 31 that penetrates vertically, for example, an octagonal hole, has a cam surface 32 on the lower surface, and has a small diameter portion 34 formed on the upper end portion via a step portion 33. The sliding cam cylinder 4 is formed with a round hole 41 penetrating vertically, has a cam surface 42 on the upper surface, and is provided with a guide projection 43 that engages with the guide groove 26 on the outer peripheral surface so as to face each other. ing. The upper half part of the polygonal shaft 5 is formed into, for example, an octagonal polygonal surface 51, and a small-diameter fitting part 53 is formed at the upper end part via a step part 52. Further, a round shaft 55 is formed in the lower half portion through an engaging step portion 54, and a stopper 56 is attached to the lower end. Since the movable cam cylinder 3, the sliding cam cylinder 4, and the polygonal shaft 5 are configured in this manner, the movable cam cylinder 3 and the sliding cam cylinder 3 are slid from below in the fitting portion 22 in order to assemble them. The cam cylinder 4 and the large-diameter coil spring 6 are inserted in this order, the polygonal shaft 5 is inserted therethrough, and the small-diameter coil spring 7 is inserted into the polygonal shaft 5 from below to abut and engage with the engagement step portion 54. After that, the ring cap 27 is screwed onto the screw 25 of the fitting portion 22, and the stopper 56 is elastically attached to the lower end of the polygonal shaft 5 protruding downward. As a result, the movable cam barrel 3 is rotatably fitted in the fitting portion 22, is integrally attached to the polygonal shaft 5 in the rotational direction and is vertically movable in the axial direction, and the sliding cam barrel 4 is The guide protrusion 43 engages with the guide groove 26 so as to be vertically movable in the fitting portion 22, and is urged by the large-diameter coil spring 6 to constantly abut on the movable cam cylinder 3 so that the polygonal shaft 5 And are mounted so as to be freely movable in the rotational and axial directions. The polygonal shaft 5 has a small-diameter coil spring 7 elastically provided between the engagement step 54 and the ring cap 27 so that the stopper 56 at the lower end abuts on the ring cap 27 so that the upper end is located above the pivot fitting 2. The pivotal fitting 2 is assembled by being biased to the protruding state. The support fitting 8 is formed in an L-shape with a vertical mounting portion 81 and a horizontal mounting portion 82. The vertical mounting portion 81 is provided with a screw mounting hole for fixing to the door frame B, and the horizontal mounting portion 82 has an upper surface. A polygonal hole 83 into which the small-diameter fitting portion 53 of the polygonal shaft 5 can be fitted is formed. The lower hanger 9 is composed of a support fitting 91 attached to the door frame B side and a pivot fitting 93 attached to the door A side. The support fitting 91 is formed in an L shape with a vertical mounting portion and a horizontal mounting portion, and a shaft rod 92 is erected on the horizontal mounting portion. A shaft hole 94 is bored in the pivot metal fitting 93, and a shaft rod 92 of a support metal fitting 91 is fitted through a thrust bearing 95 and is rotatably pivoted.

With this configuration, in order to attach the door A to the door frame B, the thrust bearing 95 of the support metal fitting 91 fixed to the door frame B is inserted into the shaft hole 94 of the pivot metal fitting 93 fixed to the door A. The lower rod 9 is assembled by inserting the shaft rod 92 through and pivotally rotatably attached. Then, in order to assemble the upper suspension 1, the polygonal shaft 5 which is incorporated in the fitting portion 22 of the pivotal fitting 2 and whose upper end is projected above the pivotal fitting 2 resists the elasticity of the small-diameter coil spring 7. When the small diameter fitting portion 53 at the tip of the polygonal shaft 5 is fitted into the polygonal hole 83 of the support fitting 8 fixed to the door frame B in the state of being pushed down, the polygonal shaft 5 becomes a small diameter coil spring. The door 7 can be securely locked by the repulsion of 7, and the door A can be hung on the door frame B by the upper hanging tool 1 and the lower hanging tool 9.

Therefore, when the door A is rotated in the opening direction, the entire weight of the door A is supported by the support fittings 91 of the lower suspension 9, but the support fittings 91 and the pivot fittings 93 on the door A side. Since the thrust bearing 95 is interposed between and, the door A can be lightly rotated. At the same time, the upper suspension 1 is assembled in the fitting portion 22 of the pivot fitting 2, and the movable cam cylinder 3 is fitted and locked by the small-diameter fitting portion 53 in the polygonal hole 83 of the support fitting 8 of the door frame B. Although it is fixed integrally with the polygonal shaft 5, the sliding cam cylinder 4 rotates integrally with the pivot metal fitting 2 by the guide protrusion 43 engaging with the guide groove 26. The cam surface 42 of the sliding cam cylinder 4 is pushed downward while sliding on the cam surface 32 of the movable cam cylinder 3 which is always in contact with the large-diameter coil spring 6, and the large-diameter coil spring 6 is elastic. The door A can be rotated and opened while maintaining the same height by being compressed against the force. Further, when the door opening operation of the door A is stopped, the cam surface 42 of the sliding cam barrel 4 ascends while rotating the cam face 32 of the movable cam barrel 3 due to the elastic tension of the large-diameter coil spring 6 being compressed. The door A can be lightly rotated and automatically returned to the closed position by the pivotal fitting 2 which is integrally fixed to the door A so as not to rotate. In this way, the door A is lightly rotated and automatically returns to the closed position to be completely closed. However, when the door A is closed, the door A is opened a lot like the door of an unused toilet. If the state is desired, the fitting and locking state of the tip small diameter fitting portion 53 of the polygonal shaft 5 and the polygonal hole 83 of the support fitting 8 may be changed. In the case of this embodiment, since the polygonal shaft 5 is formed in an octagonal shape, if it is rotated by one angle and the small tip fitting portion 53 is fitted and locked in the polygonal hole 83, it will be in a state of being rotated by 45 degrees. It is possible to always keep the door A slightly open at the return position of. The return position of the door can be set selectively.

It should be noted that the polygonal shaft 5 is not limited to being formed in an octagon, and may have another polygonal shape.

[0009]

[Effect of device]

 As described above in detail with reference to the embodiments, according to the present invention, the coil spring absorbs the vertical movement caused by the rotation of the rotating cam cylinder and the sliding cam cylinder incorporated in the pivotal fitting on the upper suspension fitting side. , The door can be opened and closed by rotating while maintaining the same height without moving up and down, and the polygonal shaft in the pivot fitting is urged above the pivot fitting to project the tip. It is designed so that it can be selectively rotated and fitted into the polygonal hole of the support bracket attached to the door frame side, so the door can be easily hung on the door frame, improving the efficiency of installation work. In addition, it can be adjusted so that the return position of the door can be selectively set. Further, since the lower suspension metal fitting side supports the entire weight of the door, the door is smoothly and lightly rotated without any load being applied to the members such as the rotating cam cylinder and the sliding cam cylinder in the pivotal metal fitting on the upper suspension metal fitting side. It can be opened and closed automatically and has the effect of being robust and having excellent durability.

[Brief description of drawings]

FIG. 1 is a side view of the door with the automatic return hinge according to the present invention in which a part of the door is cut away.

FIG. 2 is a vertical sectional side view of the automatic return hinge of the present invention.

FIG. 3 is an exploded perspective view of the self-returning hinge of the present invention, which is partially cut away.

[Explanation of symbols]

 1 Upper Lifting Tool 2 Pivot Fitting 22 Fitting Part 24 Through Hole 26 Guide Groove 27 Ring Cap 3 Movable Cam Tube 31 Polygonal Hole 32 Cam Surface 4 Sliding Cam Tube 41 Round Hole 42 Cam Surface 43 Guide Projection 5 Polygonal Shaft 53 Small-diameter fitting part 6 Large-diameter coil spring 7 Small-diameter coil spring 8 Support metal fittings 83 Polygonal hole 9 Lower lifting tool A Door B Door frame

Claims (1)

[Scope of utility model registration request] 1. A pivoting cam barrel is rotatably fitted in a pivotal fitting attached to a door side, and a sliding cam barrel which is always biased in contact with the pivoting cam barrel is vertically movable. Then
A polygonal shaft that is slidably inserted in the rotating cam barrel and the sliding cam barrel in the axial direction and rotates integrally with the rotating cam barrel is urged to project above the pivotal fitting so that the polygonal polygon An automatic return hinge for a door or the like, characterized in that the tip of the shaft is inserted into a polygonal hole of a support fitting attached to the door frame side so that the return position of the door can be selectively set.