JPH09328950A - Catch structure for hinge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the catch force of a door without disabling long-time usage of a torsion coil spring and making a structure larger as a whole by setting the elastic pressure contact position of the cam of a link plate to the bent outside. SOLUTION: A door-side mounting member 1 fixed to a door A is connected to a side-plate-side mounting member 2 fixed to a side plate B via a link plate 3 in a rotationally movable manner. Part of the link plate 3 is elastically pressurized by the arm 6a of a torsion coil spring 6 to generate catch force at the open/closed position of the door A. The arm 6a of the torsion coil spring 6 is bent from its way to the enlarging and opening direction to set the elastic pressure contact position of part of the link plate 3 to the bent end side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field relating to a catch structure for generating a catching force for holding an open / closed state of a hinge of a hinge for supporting a door of furniture or the like so that the door can be opened and closed.

[0002]

2. Description of the Related Art Conventionally, as a catch structure for a hinge, for example, one disclosed in Japanese Utility Model Publication No. 4-46050 of the present applicant is known.

The catch structure of this conventional hinge is shown in FIG.
As shown in FIG. 6, a cup-shaped door side mounting member 1 fixed to the door A and a frame type side plate side mounting member 2 fixed to the side plate B are rotatable by two link plates 3 and 4. The cam 5 formed at the end of one of the link plates 3 is elastically pressed by one arm portion 6a of the torsion coil spring 6 housed inside the side plate side mounting member 2. One link plate 3 is pivotally supported by a mounting shaft 7 fixed to the door side mounting member 1 and a mounting shaft 8 fixed to the side plate side mounting member 2. The other link plate 3
It is pivotally supported by a mounting shaft 9 fixed to the door side mounting member 1 and a mounting shaft 10 fixed to the side plate side mounting member 2. Further, the other arm portion 6 of the torsion coil spring 6
b is locked by the locking shaft 11 fixed to the side plate side mounting member 2, the coil portion 6c of the torsion coil spring 6 is slidably abutted on the other link plate 4 without being axially supported, and the cam 5 and In addition to the above contact, the torsion coil spring 6 is supported at three points.

According to this conventional hinge catch structure,
The direction in which the elastic force of the torsion coil spring 6 maintains the open and closed positions of the door A from the contact form between the cam 5 and one arm portion 6a of the torsion coil spring 6 at the open and closed positions of the door A. It acts on (catch force). In addition, the cam 5 at a partial position in the middle of the opening and closing positions of the door A
And one arm portion 6a of the torsion coil spring 6
From the contact form with the contacting force with the contact coil spring 6, the elastic force of the torsion coil spring 6 acts in a direction to assist or resist the opening and closing operations of the door A (opening and closing assisting force). Further, following the movement of the cam 5 accompanying the opening and closing of the door A, the torsion coil spring 6
The center of the coil portion 6c moves to effectively exert the elasticity of the torsion coil spring 6 and attenuates the stress applied to the torsion coil spring 6. Therefore, the catching force and the opening / closing assisting force of the door A by the torsion coil spring 6 are enhanced, and the fatigue of the torsion coil spring 6 is prevented, so that the torsion coil spring 6 can be used for a long time.

In this conventional hinge catch structure, when the catching force of the door A is to be further increased,
The arm portion 6 of the torsion coil spring 6 in the expanded state
The opening angle α (see FIG. 6) between a and 6b is increased.

[0006]

In the above-mentioned conventional hinge catch structure, when the catching force of the door A is further increased, the opening angle β of the arm portions 6a and 6b of the torsion coil spring 6 in the compressed state and Since the difference from the opening angle α becomes large, the momentum of the torsion coil spring 6 increases and fatigue damage easily occurs, which makes it impossible to use for a long period of time. Further, a large mounting space for mounting the torsion coil spring 6 having a large opening angle α must be secured, which causes a problem that the entire structure becomes large.

The present invention has been made in consideration of the above problems, and it is possible to increase the catching force of a door without disabling long-term use of the torsion coil spring or enlarging the entire structure. An object is to provide a catch structure of a hinge that can be formed.

[0008]

In order to solve the above-mentioned problems, a hinge catch structure according to the present invention employs the following means.

That is, according to the first aspect, the door side mounting member fixed to the door and the side plate side mounting member fixed to the side plate are rotatably connected by the link plate, and the torsion is provided by the cam projecting from the link plate. In the hinge catch structure that elastically presses the arm part of the coil spring to generate the catching force at the open / closed position in the door, bend one arm part of the torsion coil spring in the direction of expansion and The elastic pressure contact position is set outside the bend.

In this means, due to the bending of the arm portion of the torsion coil spring, the opening angle of the arm portion in the expanded state of the torsion coil spring is increased only at the portion that elastically abuts on the link plate, and the entire torsion coil spring is enlarged. Since it does not occur, the mounting space for the torsion coil spring does not expand so much and the catching power increases. In addition, the opening angle of the arm portion of the torsion coil spring in the compressed state also partially increases, and the momentum of the torsion coil spring does not increase.

According to a second aspect of the present invention, in the hinge catch structure of the first aspect, one arm portion is bent from the base end portion in the expanding direction.

With this means, in addition to the operation of claim 1,
The cam is bent from before the abutting position, and a large catching force in the closing direction of the cam is applied.

According to a third aspect of the present invention, in the hinge catch structure of the first aspect, one arm portion is bent in the expanding direction within a range of 10 to 30 degrees.

With this means, in addition to the operation of claim 1,
The bending force of 10 to 30 degrees gives a spring force in the acting direction of the cam.

According to a fourth aspect of the present invention, in the hinge catch structure of the third aspect, one arm portion is preferably 20 to 25.
It is characterized in that it is bent in the expansion direction within a range of degrees.

In this means, with respect to the action of claim 3,
A linear spring force is applied to the cam.

According to a fifth aspect of the present invention, in the catch structure of the hinge of the first aspect, the other arm portion of the torsion coil spring is locked to the locking shaft fixed to the side plate side mounting member, and the coil of the torsion coil spring is formed. The part is slidably abutted against another link plate provided adjacent to the link plate which is elastically supported without being axially supported.

In this means, the movement of the center of the coil portion of the torsion coil spring similar to that of the above-mentioned conventional example is combined with the action of claim 1 described above.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a hinge catch structure according to the present invention will be described below with reference to FIGS.

In this embodiment, a structure basically the same as that of the above-mentioned conventional example is shown.

In the torsion coil spring 6 of this embodiment, one arm portion 6a for elastically pressing the cam 5 extends from the coil portion 6c in the cutting line direction and is bent in the expanding direction to form a bent portion 6d, while the other portion is formed. The arm portion 6b has a normal shape extending in the cutting line direction from the coil portion 6c.
Since the material for forming the torsion coil spring 6 is a square steel wire as shown in FIG. 2, the bending process of the bending part 6d of the one arm part 6a can be performed by bending a general tool or device. .

More specifically, the bent portion 6d is provided at the base end portion of the one arm portion 6a, and is located near the coil portion 6c from the point of contact with the cam 5. as a result,
The linear portion of one arm portion 6a contacts the cam 5 at a large angle. The bending angle θ of the one arm portion 6a is 10 for hinges used for general furniture.
The range is -30 °, preferably 20 ° ± 5 °.

According to this embodiment, even if the opening angle α of the arm portions 6a and 6b in the expanded state of the torsion coil spring 6 is increased, the torsion coil spring 6 is also formed.
Only a part of becomes large, and the whole does not become too large. In other words, the opening angle α of the arms 6a and 6b in the expanded state of the torsion coil spring 6 increases only on the bent tip side where the cam 5 abuts. That is, as shown in FIG. 3, one arm portion 6 that is not bent is processed.
When a'is shown by a two-dot chain line, one arm portion 6a that has been bent is shown by a solid line, and it is understood that the sizes are clearly different.

Therefore, even if the opening angle α of the arm portions 6a, 6b in the expanded state of the torsion coil spring 6 is increased to increase the catching force, the mounting space for mounting the torsion coil spring 6 will not become too wide. . For this reason, it is not necessary to secure a large installation space for the torsion coil spring 6, and an increase in the size of the entire structure can be avoided.

Further, according to this embodiment, the arm portions 6a, 6 of the torsion coil spring 6 in the compressed state are.
At the opening angle β of b, the one arm portion 6a is slightly elastically deformed by being pushed by the cam 5, but the bent state is maintained. That is, the difference between the opening angle α and the opening angle β does not become too large.

Therefore, even if the opening angle α of the arms 6a and 6b in the expanded state of the torsion coil spring 6 is increased to increase the catching force, the momentum of the torsion coil spring 6 does not increase and fatigue damage does not occur. For this reason,
The torsion coil spring 6 can be used for a long period of time.

Further, according to this embodiment, the bending portion 6d formed on the one arm portion 6a of the torsion coil spring 6 causes the reaction force of the elastic force of the cam 5 applied to the outside of the bending of the one arm portion 6a to the coil. It becomes easy to act on the center of the portion 6c.

Therefore, the movement of the center of the coil portion 6c of the torsion coil spring 6 described in the above-mentioned conventional example becomes smooth and sensitive, and the catching force and the opening / closing assisting force are enhanced to prevent fatigue of the torsion coil spring 6 for a long time. The effect of moving the center of the coil portion 6c that enables use is further promoted.

As described above, in addition to the bent portion 6d, a second bent portion (not shown) may be provided close to the coil portion 6c in addition to the bent portion 6d. In this case, the stress concentration can be dispersed when a large bending angle is obtained.

[0030]

EXAMPLE Regarding the above-described conventional example and embodiment, the conventional example shown in FIG. 6 in which the opening angle α of the torsion coil spring 6 is 45 degrees, the opening angle β is 29 degrees and the difference is 16 degrees, etc. When the torsion coil spring 6 of FIG. 3 of the embodiment having the same structure is replaced and mounted with the opening angle α set to 56 degrees, the opening angle β of FIG. 4 becomes 39 degrees and the difference becomes 17 degrees. That is, it is understood that the momentum of the torsion coil spring 6 hardly changes.

[0031]

As described above, in the catch structure of the hinge according to the present invention, one arm portion of the torsion coil spring is bent and the link plate is elastically pressed to increase the opening angle of the arm portion of the torsion coil spring. Even so, since the torsion coil spring is not enlarged or the momentum is not increased, it is possible to increase the catching force of the door without disabling the torsion coil spring for a long period of time or enlarging the entire structure. There is.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a hinge catch structure according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is an enlarged view of a main part showing the operation of FIG.

FIG. 4 is an enlarged view of a main part showing another operation of FIG.

FIG. 5 is a cross-sectional view showing a conventional example.

FIG. 6 is an enlarged view of a main part showing the operation of FIG.

[Explanation of symbols]

 1 Door side mounting member 2 Side plate side mounting member 3,4 Link plate 5 Cam 6 Torsion coil spring 6a, 6b Arm part 6c Coil part 6d Bent part 11 Locking shaft A Door B Side plate

Claims (5)

[Claims] 1. An arm portion of a torsion coil spring, wherein a door side mounting member fixed to a door and a side plate side mounting member fixed to a side plate are rotatably connected by a link plate, and a cam projecting from the link plate serves as a cam. In the hinged catch structure that represses pressure on the door to generate the catching force at the open / closed position, one arm of the torsion coil spring is bent in the expansion direction, and the elastic contact position of the cam of the link plate is changed. A hinged catch structure characterized by being set on the outside of the bend. 2. The hinge catch structure according to claim 1, wherein one arm portion is bent from a base end portion in an expanding direction. 3. The hinge catch structure according to claim 1, wherein one arm portion is bent in the expansion direction within a range of 10 to 30 degrees. 4. The hinge catch structure according to claim 3, wherein one arm portion is bent in the expansion direction within a range of preferably 20 to 25 degrees. 5. The hinge catch structure according to claim 1, wherein the other arm portion of the torsion coil spring is locked to a locking shaft fixed to the side plate side mounting member, and the coil portion of the torsion coil spring is pivotally supported. A hinge catch structure characterized in that it is slidably abutted to another link plate provided adjacent to a link plate that is elastically pressed without being pressed.