JPH0446050Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a plurality of links between a cup-shaped mounting member that is fixed to a door of furniture, etc., and a frame-type mounting member that is fixed to the side plate of the door. The present invention relates to a hinge rotatably connected by plates, and more particularly to a catch in which a torsion coil spring is applied in the closed position of both mounting members.

[Conventional technology] Conventionally, the catch for this type of hinge was
As shown in Publication No. 55-109763 (referred to as conventional example), a cam whose tip protrudes in a direction perpendicular to the link plate is provided on an outer link plate that is pivoted to a frame-type mounting member, and a cam is provided between the outer link plate and the cam. A mechanism is provided in which one end of the spring facing the top plate of the frame-type mounting member is brought into contact with the spring, and the other end is locked to the top plate of the frame-type mounting member. In this mechanism, a torsion coil spring is used as a spring, and the center portion of the torsion coil spring is positioned by being engaged with a shaft pin inside a frame-type mounting member.

[Problem to be solved by the invention] According to the conventional catch described above, since the center of the spring is positioned, individual errors during manufacturing or assembly of each component can be eliminated between the cam and one end of the torsion coil spring. Something happens that cannot be absorbed between the two. Depending on the distance between the cam and the torsion bar at one end of the torsion coil spring, the catching force tends to be inconsistent, and variations in the catching force from product to product are unavoidable.

Furthermore, the described positioning causes bending stress to be concentrated on one end of the spring, particularly on the one end of the spring between the cam and the cam. The bending stress on one end of the spring is transmitted to the center and causes contraction of the wound portion, but in this case it is blocked by the shaft pin and is not sufficiently transmitted to the center. As a result, the torsion bar at one end of the spring between it and the cam fatigued early, resulting in a loss of catching force.

In order to exert the catching force when a torsion coil spring is used, the mechanism should be such that the cam comes into contact with the base of the torsion bar at one end in the closed position. This is because the strongest catching force is obtained at the base of the torsion bar. Preferably, during the opening and closing process, the cam should be movable from the free end of the torsion bar to the base. This allows the catch to operate effectively immediately before closing. However, in the conventional example, as shown in FIG. 2 to FIG. 1, the cam changes the contact point from the middle of the torsion bar to the free end when the door is closed. Therefore, not only does the catching force gradually decrease just before the door closes, but also the weakest spring force is used when the door is in the closed position, which has a fatal flaw. .

The present invention was developed in view of the above-mentioned circumstances, and by making it possible to support a torsion coil spring at three points in a loosely fitted state, it is possible to obtain a catching action that takes advantage of the spring characteristics, but it also provides a strong catching action. There are things whose purpose is to enable people to exert their power.

[Means for Solving the Problems] The hinge catch according to the present invention is characterized in that the hollow part of the frame-type mounting member has torsion bars at both ends, which have a substantially V-shape of a torsion coil spring, facing the inner link plate. The center part of the spring is housed, and the outer circumferential surface of the coil part located between the torsion bars is brought into contact with the winding end of the inner link plate, the outside of the torsion bar at one end is movably brought into contact with a cam, and the other end The outside of the torsion bar is locked to a frame-type mounting member and supported at three points.

[Operation] The torsion coil spring is housed in the hollow part of the frame-type mounting member, the outer peripheral surface of the coil part is in contact with the winding end of the inner link plate, and the approximately V-shaped torsion bars at both ends are connected to the cam and the locking shaft. It is supported at three points in a state where it is abutted from both outside sides to prevent it from coming out.

When the door is in the open position, the cam is in contact with one end of the torsion coil spring in front of the free end on the outside of the torsion bar, and a catching force is applied in the opening direction. In the transition to closing the door, the cam changes its contact point to the free end of the torsion bar at one end and becomes a neutral point, and then moves counterclockwise from the free end of the torsion bar to the proximal end. The contact point changes as follows. Along with this, the center of the torsion coil spring moves toward the cam while the outer circumferential surface of the coil portion located between the torsion bars at both ends rolls into contact with the winding end of the inner link plate.

In the door closing position, the cam is in contact with the base end of the torsion coil spring, so a strong catching force acts in the door closing direction, and the center of the torsion coil spring is closest to the cam. positioned.

[Embodiment] The drawings show an embodiment of the hinge catch according to the present invention, in which FIG. 1 is a longitudinal sectional view of the hinge in the closed position, FIG. 2 is an enlarged longitudinal sectional view of the main part of FIG. 1, and FIG. Figure 3 is an enlarged longitudinal cross-sectional view of the main parts of the catch in the position immediately before closing, Figure 4 is an enlarged longitudinal cross-sectional view of the main parts of the catch in the neutral position, and Figure 5 is an enlarged longitudinal cross-sectional view of the main parts of the catch in the open position. .

The hinge consists of a cup-shaped mounting member 1 that is fixed to a door A of furniture, etc., a frame-shaped mounting member 2 that is fixed to a side number B of furniture, etc., and these 1 and 2 are connected to a shaft pin 3,
It consists of a plurality of ring plates 7, 8 rotatably connected at 4, 5, 6. Cup type mounting member 1
The door A is equipped with a cup-shaped recess and a flange extending from its outer edge, and the flange is attached to the door A with a mounting screw (not shown).
Fixed. In the frame type mounting member 2, a washer 9 is fixed to a side plate B via a mounting screw 10. The washer 9 is molded from synthetic resin, and has an elongated and rectangular base with screw insertion holes 11, 11 provided in the front and rear parts, respectively, and an intermediate portion between the screw insertion holes 11, 11. The nuts 12, 12 are inserted into the nuts 12, 12.
The fixing screw 15 and the adjusting screw 16 are inserted through the long groove 13 and watch hole 14 of the frame-type mounting member 2 into the screw hole.

The catch consists of a cam 20 and a torsion coil spring 23 whose one end 24 abuts between the cam 20 and whose other end 25 is locked to the frame-type mounting member 2. More specifically, the cam 20 is integrally formed with a cam surface whose tips protrude in a direction perpendicular to the link plate 7 from both widthwise end surfaces of the outer link plate 7 which is pivotally connected to the shaft pin 4 of the frame type mounting member 2. The cam surface has a beak surface 21 that is bent and protrudes into a substantially beak shape.
and a depressed surface 22 which is recessed from the beak surface 21. On the other hand, the torsion coil spring 23 is housed in the hollow part 17 between the side plates 2a of the frame type mounting member 2 in a free state in which no shaft or the like is inserted through the center part 26 and the position is not fixed. ing. The torsion coil spring 23 is composed of a plurality of pieces, one end of which is the torsion bar 2.
4 are close to the side plates 2a of the top-frame type mounting member 2 and are in contact with the cams 20, respectively, and the torsion bars 25 at the other end are respectively locked on locking shafts 27 fixed between the side plates 2a. There is. As shown in the figure, these torsion bars 24 and 25 are connected to an inner link plate 8 with the center portion 26 facing the top plate.
It is placed facing downwards. In addition, the torsion coil spring 23 has a coil portion outer peripheral surface 23a located between torsion bars 24 and 25 having a substantially V-shape as shown in the figure, and a coiled end of a link plate 8 which is pivotally attached to the inside of the frame type mounting member 2. It is in contact with the portion 8a. Therefore, a three-point support mechanism is constituted by the cam 20, the locking shaft 27, and the winding end portion 8a.

Next, the operation based on the above configuration will be explained. As shown in FIG.
It is in contact with the free end front side 24a of one end 24.
Therefore, the spring force of the torsion bar 24 acts in the opening direction of the door A via the link plate.

As shown in Fig. 4, at the start of closing, the cam:
The contact point changes to the free end 24b of the torsion bar at one end, and the center of the torsion coil spring 23 moves in the direction in which it is furthest apart. Since the spring force is acting on the center of the cam 20 (that is, the center of the shaft pin 4), it is in a neutral position.

As shown in FIG. 3, when the door A moves to the closed position, following the counterclockwise movement of the cam 20, the torsion bar 24 changes its point of contact with the beak surface 21 from its free end 24b to its free end 24b. It changes toward the center portion 24c. In response to the above-mentioned change, the torsion coil spring 23 moves toward the cam 20 in accordance with the above-mentioned displacement while its coil portion outer circumferential surface 23a abuts around the winding end portion 8a of the link plate 8. In this case, the protruding direction of the cam 20 changes from the direction perpendicular to the torsion bar 24 to the lateral direction, so that
The spring force acts in the lateral direction of the beak surface 21. At this position, a catching force acts in the closing direction.

In the closed position, as shown in FIG. 2, following the further movement of the cam 20 in the counterclockwise direction, the torsion bar 24 moves its contact point with the beak surface 21 from its center 24c toward its base 24d. change. Torsion bars 24 and 25 according to the above changes
Since the neutral point with respect to the torsion coil spring 23 further shifts, the torsion coil spring 23 moves further toward the cam 20 according to the above-mentioned amount of shift while its coil portion outer circumferential surface 23a abuts around the winding end portion 8a of the link plate 8. .
As a result, the cam 20 is in contact with the most proximal portion 24d of the torsion bar 24. At the same time, cam 2
Since the dropping start surface of the dropping surface 22 of 0 intersects with the further lateral direction of the torsion bar 24,
The spring force is acting in the closing direction.

According to the above embodiment, the following effects are achieved.

As the door A closes, the beak surface 21 of the cam 20 changes the point of contact between the two from the free end 24b of the torsion bar 24 toward the base 24d, so that the closing force is strengthened according to the degree to which the door A is closed. Is possible. In the position immediately before closing, the torsion bar 24 is connected from the free end 24b to the center portion 24c and from the center portion 24c to the base portion 24d.
It is possible to increase the catching force when moving to.

Since the acting direction of the torsion bar 24 is made to correspond to the above-mentioned change, the catching force can be strengthened for the above-mentioned reason as well.

Since the torsion coil spring 23 can be freely moved within the hollow portion 17 within the range restricted by the winding end portion 8a, it is possible to bring the beak surface 21 of the cam 20 into contact with the most proximal portion 24d of the torsion bar 24. In addition to the above reasons, it also strengthens the catching power.

[Effects of the invention] As explained above, the invention provides the following effects.

Since the torsion coil spring moves as the cam moves, it was possible to fully utilize the spring force and exert a catching force. In particular, in the closed position, the cam could be brought into contact with the base of one end of the torsion coil spring, resulting in a strong catch. According to experiments, it was possible to improve the catching force by approximately 30% compared to the conventional mechanism in which the center of the torsion coil spring is positioned.

Since the outer circumferential surface of the coil part rolls into contact with the arc surface on the winding end side of the inner link plate, the torsion coil spring can be easily moved and bending stress can be evenly distributed to the torsion bars at both ends. As a result, it is possible to eliminate the conventional drawback that only the torsion bar at one end that contacts the cam gets fatigued and loses its catching force.

For the above reasons, a large catching force can be obtained using a small torsion coil spring, so the installation space can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the hinge catch according to the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the hinge in the closed position, Fig. 2 is an enlarged longitudinal cross-sectional view of the main part of Fig. 1, and Fig. 3 is a closed view of the hinge. FIG. 4 is an enlarged vertical cross-sectional view of the main part of the catch in the neutral position, and FIG. 5 is an enlarged longitudinal cross-sectional view of the main part of the catch in the open position. 1...Cup type mounting member, 2...Frame type mounting member, 2b...Top plate portion of frame type mounting member,
3, 4, 5, 6... shaft pin, 7, 8... link plate, 8a... winding end of link plate 8, 9
...Washer, 17...Hollow part, 20...Cam, 21
... Beak surface, 22 ... Fallen surface, 23 ... Torsion coil spring, 23a ... Coil portion outer peripheral surface, 24 ...
...Torsion bar at one end of the spring, 24a... Free end of the torsion bar, 24b... Free end of the torsion bar, 24c... Center part of the torsion bar, 24d... Base of the torsion bar, 25...
...Torsion bar at the other end of the spring, 26...The center of the torsion coil spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A cup-type mounting member fixed to the door and a frame-type mounting member fixed to the side plate are rotatably connected by four shaft pins using two ring plates on the inside and outside. The outer link plate pivotally connected to the frame-type mounting member is provided with a cam whose tip protrudes in a direction perpendicular to the link plate, one end of a torsion coil spring is brought into contact with the cam, and the other end of the torsion coil spring is brought into contact with the cam. In a hinged catch whose ends are locked to a frame-type mounting member, the hollow portion of the frame-type mounting member has a substantially V-shaped torsion bar at both ends of the torsion coil spring, with the spring center facing toward the inner link plate. The outer circumferential surface of the coil portion located between the torsion bars is brought into contact with the winding end of the inner link plate, the outside of the torsion bar at one end is movably abutted by a cam, and the torsion bar at the other end is brought into contact with the winding end of the inner link plate. A hinge catch characterized in that the outer side is locked to a locking shaft of a frame type mounting member and supported at three points.