JPH0330541Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a hinge used for folding doors of furniture and fittings, and is capable of holding the folding door in a locked position in the closed position. be.

[Prior Art] Japanese Utility Model Publication No. 57-23655 discloses a device that includes a pair of mounting plates that are attached to a folding door, and that the pair of mounting plates are substantially flush with each other in the closed position of the folding door and are folded in the closed position. Disclosed is a hinge which is rotatably connected by a shaft pin, and in which a pair of mounting plates are each provided with a locking mechanism consisting of an engaging member and an engaged member that can maintain the posture of the folding door in the closed position. ing.

Further, as in Japanese Utility Model Application Publication No. 57-150177, a hinge is provided which forms a stopper by abutting the end face of a mounting plate at the closed position of a folding door.

[Problem to be solved by the invention] However, in the former case, since the spring is pressed toward the center of the recess in the shaft bearing, no rotational moment is generated in the closed position of the folding door, and the resistance to vibration is low. is almost non-existent. In other words, a rotational moment is applied only when vibration occurs and the lock moves out of the closed position, and a force is applied to return the lock to its original position, making it impossible to completely lock the lock in the closed position.

In the latter case, although the mounting plate acts as a stopper in the direction of impact when the folding door is in the closed position, it has no resistance in the opposite direction, so rattling is unavoidable.

Here, U.S. Patent No. 3,851,354 relates to a self-closing cathode mechanism, and when used in the closed position of a folding door, the flat end surface of the pusher and the arcuate surface of the tube are in contact with each other. It is too small and cannot perform any posture maintaining function. Rather, from the viewpoint of achieving smooth rotation during opening and closing, it is completely possible to prevent wobbling in the closed position.

Even if these are combined, the locking force and the stopper act in parallel in the linear direction, and rattling on the closing side of the folding door cannot be avoided.

The main purpose of the present invention is to eliminate the above-mentioned drawbacks and to ensure that the folding door can maintain its posture without rattling in the closed position.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a pair of mounting plates that are attached to a folding door, a shaft pin that rotatably connects the pair of mounting plates, and one of the mounting plates. an engaging member that is slidably provided on the upper surface and whose tip end side is pressed toward the other mounting plate by a pressure spring; and an engaged member that is provided on the upper surface of the other mounting plate and that engages with the engaging member. This invention relates to a hinge for a folding door comprising the following.

The feature of this folding door hinge is that the engaging member has a wedge-shaped cam surface that has an inclined surface on the mounting plate side that is inclined with respect to the engaged member on the distal end side, and a cam surface on the distal end side that projects in a wedge shape. and a through hole through which the shaft pin passes and allows the engagement member to move back and forth, and the engaged member is located on the engagement member side and has a closing engagement surface portion erected to allow the folding door to close. In the closing position, the closing engagement surface portion is pressed against the mounting plate side inclined surface to move the folding door to the closing position, and the stoppers that come into contact with each other in this transition are provided on the pair of mounting plates. It is in.

[Operation of the invention] Attach the pair of mounting plates to one side of each folding door to be connected using screws, etc.

When the folding door is bent from each connection part in order to move from the closed position to the open position in the above-mentioned installed state, rotational force acts on the mounting plate around the shaft pin, and the cam surface of the engaging member is rotated on the mounting plate side inclined surface. Due to the pressing force of the closing engagement surface portion of the engaged member that is in contact with the engaging member, the engaging member is caused to retreat against the spring force of the pressing spring. At this time, the shaft pin is in the through hole, so
The engaging member retreats smoothly. When the closing engagement surface of the engaged member exceeds the apex (dead point) of the cam surface, the engagement between the engagement member and the closing engagement surface of the engaged member is disengaged; Both mounting plates are free to rotate relative to each other, and the folding door can be easily bent. At this time, the engaging member is returned to its original position by the spring force of the pressing spring.

In addition, when changing the folding door from the open position to the closed position, when the folding door in the open position is expanded to the closed position side, the closing engagement surface portion of the engaged member is brought into contact with the other cam of the engagement member. The engaging member is moved backward against the spring force of the pressing spring, and when the closing engaging surface exceeds the apex (dead point) of the cam surface, the engaging member is moved against the pressing spring. The spring force protrudes again, and the mounting plate side inclined surface of the cam surface is pressed into contact with the closing engagement surface portion of the engaged member, so that the engaging member and the engaged member are locked. Moreover, since the spring force of the inclined surface of the cam surface on the mounting plate side is applied to the stoppers on the end faces of the mounting plates through the closing engagement surface, the folding door can be locked when the stopper prevents the folding door from bending. state.

[Example] Figures 1 to 4 show examples of the folding door hinge of the present invention, in which Figure 1 is a vertical front view, Figure 2 is a plan view, and Figure 3 is a diagram in which the engaged member is free. FIG. 4 is a longitudinal sectional front view for explaining the operation showing the state from the state to the state until the engagement member is engaged with the lock groove of the engagement member, and FIG. 4 is a plan view showing an example of the state of use.

In the figure, 1 and 1 are mounting plates, 2 is a shaft pin, 3 and 3 are bosses, 4 and 4 are the mounting plates, 1 and 1 are stopper surfaces, and 5 is a mounting hole. The stoppers 4, 4 are
As shown in the figure, the outer end surfaces of the mounting plates 1, 1 are bent to have a thick wall so as not to protrude from the seat side.

Thus, on the upper surface of the mounting plates 1, 1, the engaging member 6 of the locking mechanism is placed on one side, and the engaged member 7 is placed on the other side.
is provided. The engaging member 6 has a block-like shape as a whole, and has a wedge-shaped cam surface 6a on its tip end side, which is the other mounting plate side, and the shaft pin 2 on its upper surface.
A locking groove 6b parallel to the
The shaft pin 2 is provided on the cam surface 6a.
A hole 6c is bored through the shaft pin 2, and the shaft pin 2 passes through the through hole 6c without interfering with the back and forth movement of the engagement member 6. 6d is a pressing spring housing hole provided in the engagement member 6, and 6e is a vertex. Reference numeral 9 denotes a contact surface of the pressing spring 8, which is provided on the mounting plate 1. Reference numeral 10 denotes a guide for the engaging member 6, which is provided on the mounting plate 1. 7a is a closing engagement surface provided on the engaged member 7, and 7b is an opening engagement surface. Reference numeral 11 is a notch provided in the mounting plate 1 on the side of the engaged member 7 to escape the contact of the cam surface 6a.

12 is a folding door.

According to the above configuration, when installing the folding door 12, as shown in the fourth figure, the pair of mounting plates 1, 1 are attached to one side of each folding door 12, 12 to be connected, and each folding door 12, 12 is in the closed state. Bend each connection part to make it open. At that time, when pushed back with a force greater than the rotational moment in the closing direction, rotational force acts on the mounting plates 1, 1 around the shaft pin 2, and the mounting plate side inclined surface of the cam surface 6a of the engaging member 6 Due to the pressing force of the engaged member 7 in contact with 6a, the engaging member 6 resists the spring force of the pressing spring 8 and moves the engaging member 6 backward. Then, when the closing engagement surface portion 7a of the engaged member 7 exceeds the apex 6e (dead point) of the cam surface 6a, the engagement between the engaging member 6 and the engaged member 7 is disengaged, and the engaged member 7 is disengaged. The member 6 has a notch 11
pass through. Both mounting plates 1, 1 are in a state of free rotation relative to each other as shown by the dashed line in Fig. 3, and each folding door 1
The second bend is easily made. At this time, the engaging member 6 has returned to its original position by the spring force of the pressing spring 8.

Furthermore, when the folding of each folding door 12 progresses and reaches the open position, the opening engagement of the engaged member 7 is applied to the upper surface of the cam surface 6a of the engaging member 6 as shown by the two-dot chain line in FIG. The mating surface portion 7b abuts and causes the engaging member 6 to retreat again against the spring force of the pressing spring 8, and the opening engaging surface portion 7b of the engaged member 7 locks the upper surface of the engaging member 6. It engages with the groove 6b (see solid line in FIG. 3). In such a case, the engaging member 6 and the engaged member 7 are brought into a locked state by the spring force of the pressing spring 8, and the open state of the folding door is completed and the open position is maintained in that state.

In addition, when changing each folding door 12 from an open state to a closed state, when the folding door 12 in the open state is unfolded toward the closed state, the unfolding force of the folding door 12 causes the lock groove 6b on the upper surface of the engagement member 6 to The opening engagement surface portion 7b of the engaged member 7 that is engaged is exposed to the spring force of the pressing spring 8, and the engagement member 6 is moved back a little to disengage it from the locking structure 6b. Board 1,1
The folding door can be easily bent since the two are in a free rotating state relative to each other. As the folding of each folding door 12 progresses and approaches the closed position, the closing engagement surface portion 7a of the engaged member 7 comes into contact with the upper surface of the cam surface 6a of the engagement member 6, causing the engagement When the member 6 is moved backward against the spring force of the pressing spring 8 and the closing engaging surface portion 7a exceeds the apex 6e (dead point) of the cam surface 6a, the engaging member 6 is moved back against the spring force of the pressing spring 8. The spring force protrudes again, and presses the mounting plate side inclined surface 6a of the cam surface 6a against the closing engagement surface portion 7a of the engaged member 7. In this press-contact state, a rotational moment in the closing direction acts, so the stopper surfaces 4, 4 of the end surfaces of the mounting plates collide with each other due to spring force, and the engaging member 6 and the engaged member 7 are completely locked. Thus, the closed state of the folding door is completed and that position is maintained.

[Effects of the invention] As explained above, according to the invention, the engagement member of the locking mechanism has a wedge-shaped cam surface formed on the distal end side, and is pressed from the rear end side toward the distal end side by a pressing spring.
The inclined surface of the cam surface on the mounting plate side is pressed against the closing engagement surface of the engaged member by a spring force, and a rotational moment is applied to the mounting plate side, and this rotational moment is brought into contact with the stopper. According to
We were able to put into practical use a hinge specifically for folding doors that can lock the folding door in the closed position without rattling in any direction and maintain its posture in a flush state.

In particular, while allowing the shaft pin to escape through the through hole, the engaging member is made to protrude toward the other mounting plate, and the inclined surface on the mounting plate side is made into a cam surface that is inclined with respect to the engaged member, and then the closing engagement is made. By erecting the surface portion on the upper surface of the other mounting plate, it was possible to put the hinge for a folding door into practical use. As a result, it is possible to exert a stronger rotational moment while maintaining the thin shape, and it is possible to strongly maintain a flush posture.

[Brief explanation of the drawing]

Drawings 1 to 4 show an embodiment of the folding door hinge of the present invention, in which Fig. 1 is a longitudinal sectional front view, Fig. 2 is a plan view, and Fig. 3 shows a state in which the engaged member is engaged from a free state. FIG. 4 is a longitudinal sectional front view for explaining the operation showing the state up to engagement with the locking groove of the member, and FIG. 4 is a plan view showing an example of the state of use. 1... Mounting plate, 2... Shaft pin, 4... Stopper surface, 6
...Engaging member, 6a...Cam surface, 6a'...Mounting plate side inclined surface, 6c...Through hole, 6d...Press spring accommodation hole, 7...
Engaged member, 7a... Closing engagement surface portion, 8... Pressing spring, 12... Folding door.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of mounting plates that are attached to a folding door, a shaft pin that rotatably connects the pair of mounting plates, and a shaft pin that is slidably provided on the top surface of one of the mounting plates and is supported by a pressing spring. an engagement member whose tip side is pressed toward the other mounting plate;
In a folding door hinge comprising an engaged member that is provided on the upper surface of the other mounting plate and that engages with the engaging member, the engaging member has a distal end portion thereof that is connected to the engaged member. A cam surface having an inclined surface on the side of the mounting plate and protruding in a wedge shape, and a through hole through which the shaft pin passes through on the distal end side of the cam surface to allow forward and backward movement of the engaging member, The member is located on the engagement member side and has a closing engagement surface section erected, and in the closed position of the folding door, the closing engagement surface section is pressed against the inclined surface of the mounting plate, so that the folding door moves to the closed position side. A hinge for a folding door, characterized in that stoppers that are moved and come into contact with each other on the closed position side of the folding door are provided on a pair of mounting plates.