JP3264476B2 - Door natural opening prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a case in which a door attached to furniture such as a bookcase, a cupboard, a closet, etc. is not opened by hand, even if a large force acts from the inside of the door due to an earthquake or a large vibration. The present invention relates to a device for preventing a door from being naturally opened.

[0002]

2. Description of the Related Art Clothes closets, cupboards, bookcases, and other furniture are provided with a single door at the opening.
Alternatively, the two doors are arranged in a double-door manner so as to face each other, and hinges are attached to the doors so as to be freely opened and closed. To easily and reliably open and close the door, a handle is attached to the door, and a locking device such as a magnet type or a spring type is provided between one of the doors and the furniture body to prevent the door from opening unnecessarily. In the case of the type, the door is opened between the doors only when an external force is applied to the door with a force greater than the locking force of the door. Unless a force greater than the locking force of the locking device acts, the door is prevented from opening unnecessarily with a slight swing or tilt.

[0003]

The door does not open or close unnecessarily due to the action of the locking device when the furniture is stationary, even if such a locking device of the magnet type, the spring type, or any other type is used. , Can achieve its purpose. However, when furniture shakes or falls over when an earthquake occurs or during transportation, etc., with conventional locking devices, a force greater than the locking force of the locking device is applied to one or both doors due to the swinging of the door. When acted directly or from the inside by moving the contents, this force can easily release the locking device and open the door spontaneously, causing the door to break or the stored article to pop out and damage the article. . In addition, it is conceivable to use a key attached to the door to prevent the door from opening unnecessarily in response to such a large shaking, etc. There is a problem that it takes more trouble than necessary and is troublesome.

According to the present invention, as long as the door is not manually opened with a handle, even if a force greater than the locking force of the locking device acts on the door due to an earthquake or large vibration, it can be attached to furniture such as a cupboard or a closet. An object of the present invention is to prevent the furniture body from falling over by opening the door so as to prevent the door from opening naturally, and to prevent damage by the stored articles jumping out.

[0005]

In order to achieve the above object, a natural opening prevention device for a door according to the present invention comprises a locking body provided with a rack cam rotatable in a closing direction of the door, and furniture. A strike attached to the main body to lock the rack cam, and a rotation of the rack cam is selectively provided on the locking tool main body so as to swing by pulling a handle to release the lock with the strike. In the device for preventing natural opening of the door, which consists of a lock plate that regulates
Forming an L-shaped spring contact surface that is bent at the portion;
Selective contact of a leaf spring for rack cam return to the spring contact surface
And the rack cam engages with the strike.
The hook engages with the rack cam contact surface of the lock plate and the rack
Forming a locking pawl to prevent rotation of the cams, the locking plate
By moving the lock piece and the lock plate of the rack cam
Handle to release the latch from the rack cam contact surface
Natural opening prevention device of the door, characterized in that digit.

In the apparatus for preventing natural opening of a door according to the present invention having the above-mentioned structure, a locking member body is attached to a door provided on the opening surface of the furniture body so as to be openable and closable, and the door is closed to a furniture body side plate opposed to the door. At this time, since the strike is provided so as to be locked with the rack cam of the lock body, the rack cam and the strike of the lock body facing each other are automatically locked and locked with each other just by closing the door. Therefore, even in the event of an earthquake, etc., the door can be prevented from opening unnecessarily, and it is safe.In addition, when opening the door, the rack cam of the locking body can be turned simply by pulling the handle provided on the door, and the strike The lock is automatically released and the door can be opened naturally by pulling the handle, but the rack cam can rotate only in the closing direction of the door, and in the opening direction of the door unless the handle is pulled, such as swinging furniture. Disabled , Rack cam is door is locked by the strike are not able to open indiscriminately, it can be prevented from jumping out of the stored articles by opening the door.

In particular, when the rack cam is locked with its locking claw and strike, the locking claw is also locked with the lock plate at the same time to prevent the rotation of the rack cam. Although the lock is prevented, the lock plate is also moved by pulling the handle to release the lock of the rack cam with the lock claw, so that the rotation of the rack cam is permitted and the door can be easily opened.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for preventing natural opening of a door according to the present invention. In the illustrated embodiment, F indicates a part of a side plate of a furniture body such as a closet, a cupboard, a locker, etc., and a side plate F of an opening of the furniture body.
, A door D is provided to be freely opened and closed via a hinge. Since the method of mounting the door is the same as the conventional method, a detailed description thereof will be omitted. Then, a locking device having a special configuration according to the present invention is provided between the door D and the side plate F of the furniture body facing the door D.

This locking device can be easily opened and closed like a conventional product during daily use so that the door can be easily opened and closed on the back side of the position opposite to the handle H provided on the door D. A locking device main body A that prevents the door from opening unnecessarily due to vibration and the like, and a locking device main body A when the door D is closed.
And a strike B provided inside the side plate F of the furniture main body so as to be locked to each other.

As shown in detail in FIGS. 1 to 3, the locking device main body A includes a locking device main case 1 which is fixed to the back side of the door D with screws or the like, and the locking device main case 1 It is composed of a lock plate 2 which can be retracted by pulling a handle therein and which is inserted under a spring pressure, and a rack cam 3 which is rotatably supported by the locking device main body case 1.

As shown in FIG. 3, the locking device main body case 1 has mounting holes 11 made of screws or the like at both ends of a base 10, and a lock plate 2 is inserted between the mounting holes 11, 11. And a hole 13 for inserting the guide pipe 7 is formed in the bottom of the lock plate fitting insertion groove 12, and further connected to the lock plate fitting insertion groove 12. The rack mounts 15 are formed integrally with the spring mounts 14 so as to be connected to and protrude from the opposite side plates at the positions of the lock plate fitting grooves 12. Mounting shaft hole 17, 1
7 is drilled.

The lock plate 2 which is slidably fitted in the lock plate fitting groove 12 is shown in detail in FIG. When the lock plate 12 is inserted into the lock plate insertion groove 12, a hole 21 having substantially the same diameter is formed at a position facing the hole 13, and one end side of the hole 12 is shown in FIG. Square depression 2 as shown in (B)
2, a flange formed at the end of the guide pipe is fitted into the recess 22 to support it in a detent shape, and a spring fitting hole 23 is formed in parallel with the hole 21. Then, a stopper piece 24 is protruded from the hole 21 side end.

A guide piece 25 is formed at the side end of the spring insertion hole 23 so as to sandwich both sides of the spring mount 14, and the upper surface of the end adjacent to the guide piece is locked similarly to the stopper piece. A step is formed so as to be lower than the top surface of the plate to form a rack cam contact surface 26, and an auxiliary spring fitting hole 27 is provided adjacent to the hole 21.

The rack cam 3 is, as shown in detail in FIG.
A locking claw 31 for locking with strike B is protruded at one end, and a locking claw 33 is formed at a position of approximately 270 degrees from the locking claw 31 around a shaft hole 30 formed substantially at the center of the rack cam. The end surface 31a of the locking claw 31 and the end surface 33a of the locking claw 33 face each other at an angle of substantially 90 degrees, and the outer peripheral surface of the rack cam connected to the locking claw 33 has an arc shape. Further, the outer surface of the locking claw 31 slides along the protruding piece of the strike B and serves as a guide so that the locking claw 31 can be easily locked to the strike.
Let it be 2. On the outer periphery of the shaft hole 30, the L-shaped spring contact surfaces 34, 3 bent at the shaft hole portion are provided at the center of the outer peripheral side surface of the rack cam extending from the locking claw 31 to the locking claw 33.
5 are formed continuously.

The rack cam return spring 4 is formed by bending an L-shape with a leaf spring as shown in FIG. 7, and a locking hole 43 is formed in the horizontal base 41. The fitting 41 is adapted to be fitted and locked to the spring mounting base 14 in the locking tool main body case 1, and the base 41 is substantially L
The spring piece 42, which is bent and formed in the shape of a letter, is narrower than the base 41, and is pressed against the spring contact surface 34 or 35 of the rack cam. Accordingly, when the length of the spring piece 42 is fixed to the spring mounting base 14, the rack cam 3 is rotatably supported by the locking tool body case 1 on the shaft 3S.
Of the spring contact surfaces 34 and 35 which are bent.

Reference numeral 5 denotes a lock plate return coil spring which is inserted into the spring insertion hole 21 of the lock plate 2 and is interposed in a compressed state between the lock plate insertion groove 12 and the bottom surface. Also 6
Is an auxiliary spring that cooperates with the coil spring 6 so that the lock plate returns while maintaining the horizontal position. This auxiliary spring is supported between the hole 27 and the bottom surface of the lock plate fitting groove 12 in a compressed state.

Reference numeral 7 denotes a flanged pipe-shaped guide pipe in which a handle fixing bolt 8 for projecting and retracting the two lock plates is fitted and smoothly slid to compress the return spring 5 and the auxiliary spring 6. is there.

On the other hand, the strike B provided on the side plate F of the furniture main body is integrally formed as shown in FIG. That is, a base 91 having a size and a shape suitable for being provided on the side plate F of the furniture main body by screwing, and two engaging pieces 92, 92 protruding from the outer surface of one end of the base 91 so as to be integrally formed integrally. While being formed, the locking piece 31 of the rack cam 3 is inserted and locked between the two opposed engaging pieces 92, 92 so as to determine the interval, and the end of the base 91 inhibits the rotation of the rack cam. In order to avoid this, a part thereof may be cut out to form a stepped portion 93 as shown in FIG. A screw hole 94 is formed in the base 91 so that the base 91 can be screwed. By forming the two engagement pieces 92 in this manner, the door can be attached to both the left opening and the right opening.

In order to assemble the components thus constructed, the lock plate 2 is fitted into the lock plate fitting groove 12 of the locking device main body case 1 as in the embodiment shown in FIG. At this time, the bottom surface of the lock plate fitting groove 12 and the hole 2
The coil spring 5 and the auxiliary spring 6 are interposed in the lock plates 3 and 27, respectively, and the stopper piece 24 of the lock plate 2 is hooked on the claw 19 formed at the upper end of the lock plate fitting groove 12 so that the lock plate 2 is locked. The rack cam 3 is prevented from protruding from the plate fitting insertion groove 12 by spring pressure, and the lock cam 3 is
The rack cam 3 is inserted between the rack cam mounting pieces 15 and 15 and the shaft 3S is inserted between the shaft holes 30 and 16 to rotatably support the rack cam 3. The lock plate 2 is slidable in contact with the rack cam contact surface 26, whereby the locking tool main body A is assembled.

Next, a guide pipe 7 with a flange and a bolt 8 are inserted into the hole 21 of the lock plate 2 so that the flange of the guide pipe is fitted into the recess 22, and the guide pipe and the inside of the guide pipe are inserted. The inserted bolt 8 passes through the door D, and a main H is attached to the tip of the bolt. The locking tool main body 1 is attached to the door D with screws via the mounting holes 11.

When the door D is closed, the strike B is opposed to the locking member main body 1 and is screwed to the main body side plate F at a position locked by the rack cam 3.

In the apparatus as described above, when the door D is closed from the open state as shown in FIG. 8, one of the engagement pieces 92 of the strike B (the opening and closing mechanism can be opened and closed in either the left or right direction of the door). When the spring abutment surface 34 of the rack cam 3 abuts on the two pieces 92, the lock claw 33 is in contact with the rack cam abutment surface 26 and is not locked. The rack cam 3 rotates and returns to the state shown in FIG. 1, the door D is completely closed, and the locking claws 31 of the rack cam are locked again with the engaging pieces 92. In this state, even if a force is applied in the direction in which the furniture body swings and the door is opened, the lock piece 33 of the rack cam is kept on the rack cam contact surface 2 of the lock plate 2.
Locked at 6, the rotation of the rack cam is prevented, and the door does not open unnecessarily. However, when the handle H is pulled, the lock plate 2 slides against the spring pressure, and the lock pawl 3
3 is disengaged from the rack cam contact surface 26, the rack cam becomes rotatable, and the door D opens freely. At the time of immediate opening and closing, the rack cam 3 is automatically returned by the spring 4 even if it rotates.

[0022]

According to the device for preventing the natural opening of the door of the present invention, the strike provided on the furniture body and the rack cam provided on the door are locked and locked by simply closing the door. However, the door does not open unnecessarily due to furniture swing, etc., and it is safe even in the event of an earthquake, and when opening the door, it is provided on the locking device main body just by pulling the handle provided on the door. The movement of the lock plate enables the rotation of the rack cam to release the engagement with the strike, the door is opened naturally, and the operation can be simplified and the stored articles can be prevented from jumping out due to the unnatural opening. In particular, when the rack cam is locked with the locking claw and the strike, the lock claw is also locked with the lock plate at the same time to prevent the rotation of the rack cam, so that the opening of the door is prevented. But,
By pulling the handle, the lock plate also moves and the lock of the rack cam with the lock claw is released, so that the rotation of the rack cam is allowed and the door can be easily opened.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a first embodiment of a device for preventing natural opening of a door according to the present invention, in a state where the door is closed.

FIGS. 2A and 2B are explanatory views of the locking device main body, wherein FIG.
(B) shows the longitudinal front view respectively.

3 (A) is a plan view, FIG. 3 (B) is a longitudinal sectional front view, and FIG. 3 (C) is a bottom view.

FIG. 4 is an explanatory view of the rack cam, (A) is a front view,
(B) is a side view.

5 (A) is a plan view, FIG. 5 (B) is a longitudinal sectional front view, and FIG. 5 (C) is a bottom view.

6 (A) is a front view, FIG. 6 (B) is a side view, and FIG. 6 (C) is a plan view.

7 (A) is a front view, FIG. 7 (B) is a side view, and FIG. 7 (C) is a plan view.

FIG. 8 is an explanatory view showing the rack cam of the door natural opening prevention device of the present invention in a state where the door is opened.

[Explanation of symbols]

 F Side plate of the furniture body A Lock body B Strike D Door H Handle 1 Fixture body case 2 Lock plate 3 Rack cam 4 Spring 5 Coil spring 6 Auxiliary spring 7 Guide pipe 8 Bolt

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E05C 3/16 A47B 96/00 E05B 65/44

Claims (1)

(57) [Claims] 1. A lock body having a rack cam rotatable with respect to a closing direction of a door, a strike attached to a furniture body for locking with the rack cam, and a handle being pulled on the lock body. natural opening prevention device smell become more door lock plate for selectively restrict rotation of the rack cam to release the engagement between the strike provided to swing by the operation
L-shape that bends at the shaft hole on the outer peripheral side of the rack cam
A spring contact surface is formed, and the spring contact surface is
Selectively contact the leaf springs for
A locking claw that locks the strike to the spider and a lock plate
Engage with the cam cam contact surface to prevent the rotation of the rack cam
By forming a lock claw and moving the lock plate
The lock piece of the rack cam and the rack cam contact surface of the lock plate
A device for preventing natural opening of a door, comprising a handle for releasing a lock of the door.