JP3119790B2 - Double door locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double door locking device generally called a double door.

[0002]

2. Description of the Related Art In general, both doors of a clothes dance and the like are supported by a main body (support) having an open front surface and openable and closable, respectively, on left and right sides of an opening of the main body. A pair of doors, and the pair of doors are locked in a closed position by a locking device. FIG. 7 shows a conventional example of such a locking device, and reference numerals 1 and 2 in the figure denote a pair of doors. A pair of doors 1 and 2 is a main body (not shown)
Each of the left and right sides of the opening is rotatably supported, and a mating member 3 for positioning the other door 2 at the closed position is provided on the back surface of the one door 1.
Reference numeral 4 denotes a horizontal base plate forming a part of the main body, and defines a lower edge of an opening of the main body.

[0003] At the lower end of the door 1, a claw hooking mechanism 6 for fixing the door 1 to the main plate 4 is attached. The nail hook mechanism 6 has a nail hook 8 that can be slid up and down, and a projection 10 formed on the hook 8 is exposed on the end surface of the door 1. Then, with the door 1 closed, the projection 1
When the hook 8 is pressed down through the
Is fitted into the receiving metal fitting 12 embedded in the base plate 4. Thereby, the door 1 is fixed to the main plate 4.

On the other hand, a lock mechanism 14 for fixing the door 2 to the door 1 is attached to the door 2. Lock mechanism 14
When a key is inserted into the keyhole 16 and turned, the lock plate 18 is protruded toward the door 1, and the protruding lock plate 18 is secured to the receiving bracket 20 fixed to the door 1.
Fits. As a result, the door 2 is fixed to the door 1.

[0005]

When locking the open doors 1 and 2 in the locking device, first, only the door 1 is closed and the door 1 is fixed to the main plate 4 by the claw hooking mechanism 6. After that, the door 2 is closed, the lock mechanism 14 is operated, and the door 2 is closed.
Is required to be fixed to the door 1 in two steps. Similarly, when the closed doors 1 and 2 are opened, a two-stage operation of opening the door 2 by unlocking the lock mechanism 14 and then removing the hooking mechanism 6 is necessary. For this reason, locking,
There is a problem that the operation of unlocking is complicated and time-consuming. If the user does not close the hook mechanism 6, the lock mechanism 14
Even if the door is locked, if the doors 1 and 2 are pulled strongly, as shown in FIG. 8, both doors 1 and 2 may be opened although they are relatively small.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a double-door locking device that can perform complete locking with one operation.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is to close the pair of doors of a double-opening door having a pair of doors attached to a support so as to be capable of opening and closing and rotating. A locking device for locking at a position, comprising a lock mechanism attached to one door, and a lock receiving mechanism attached to the other door, wherein the lock mechanism is an operation unit for performing a locking operation; A first lock member that is moved from an initial position to a first locking position by a locking operation on the operation unit and is moved from the first locking position to the initial position by an unlocking operation on the operation unit; mechanism, by engaging the first locking member which has moved to the first locking position, the first engaging portion, wherein the one door is prevented from moving open times from the closed position, the from the initial position 1 No. to move to the locked position
Move from initial position to second locked position by one lock member
By provoking the engage with the second engaging portion provided to the support prevents the said other door is open pivot from the closed position, and wherein from said first engaging portion first A second lock member that moves from the second locked position to the initial position in conjunction with the release of the lock member. In this case, it is desirable that the support be provided with a receiving member that positions the pair of doors at the closed position by abutting on the pair of doors that close and rotate. Preferably, the receiving member is provided with a second engaging portion that engages with the second lock member moved to the second locking position.

[0008]

According to the first aspect of the present invention, when a pair of opened doors is closed and locked, first, both doors are turned to the closed position. Thereafter, the operation section of the lock mechanism is operated to lock. Then, the first lock member engages with the first engagement portion of the lock receiving mechanism. Thus, the opening rotation of one door is prevented by the other. At the same time, the second lock member of the lock receiving mechanism is engaged with the second engagement portion of the support, and the opening of the other door is prevented by the support. As a result, the doors cannot be opened and rotated with respect to the support. When opening a pair of locked doors, the operation unit of the lock mechanism is unlocked. Then, the engagement between the first lock member and the first engagement portion is released, and the engagement between the second lock member and the second engagement portion is released.
Thus, the pair of doors can be opened and rotated. According to the second aspect of the present invention, the two doors can be automatically positioned at the closed position by simply rotating the pair of opened doors until they hit the receiving member. In the invention according to claim 3, since the second engaging portion is provided on the receiving member, the number of parts can be reduced as compared with the case where both are provided separately.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIGS. 1 to 5 show an embodiment of a double-door locking apparatus according to the present invention. In this embodiment, a support (only a main plate 26 constituting a part of the support is illustrated). Left and right pair of doors 2 rotatably supported
2 and 24 are fixed to the main plate 26. In the following description, the direction in which the doors 22 and 24 open is referred to as front, and the direction in which the doors 22 and 24 close is referred to as rear.

First, the schematic configuration of the locking device will be described.
A lock mechanism 28 that is locked and unlocked with a key (not shown) is fixed to the right door (one door) 24, and a lock mechanism 28 is locked to the left door (the other door) 22. Is locked, the lock receiving mechanism 50 that engages with the lock is fixed.
The receiving member 70 is fixed to the main plate 26.
Hereinafter, each part will be described in detail.

The lock mechanism 28 has an operation unit 30. The operation unit 30 has a cylindrical cylinder 31 and a shaft 32 that is rotatably and immovably inserted into the cylinder 31. As shown in FIG. 4, the cylinder 31 is inserted into a through hole 24A formed in the door 24, and is fixed to the door 24 by a cylinder ring 48, a mounting plate 34, and a nut 36. On the other hand, shaft 3
2 has a keyhole 33 formed on the front surface.
Are rotatable between an unlocked position located as shown in FIG. 2 and a locked position rotated by approximately 90 ° from this unlocked position. However, in the locked position and the unlocked position, rotation cannot be performed unless a key is inserted into the keyhole 33 and turned.

At the rear end of the shaft 32, an external thread 40 coaxial with the shaft is integrally provided. This male screw part 4
0, a lock plate (first lock member) 42
Are fitted. The lock plate 42 is fixed to the shaft 31 via a washer 44 by tightening a lock nut 46 screwed into the male screw portion 40. As shown in FIGS. 1 to 3, the lock plate 42 has a rectangular plate shape. When the lock mechanism 28 is unlocked, the lock plate 42 rotates to an initial position in which the longitudinal direction faces vertically upward, and when the lock mechanism 28 is locked, the horizontal position ( (A first locking position). Since the configuration of the lock mechanism 28 other than the above is the same as that of the well-known one, the description thereof is omitted.

The lock receiving mechanism 50 has a box-shaped casing 55 composed of case members 54 and 56 as shown in FIG. On both sides of the casing 55, the mounting plate 52
(See FIGS. 1 to 3), and the mounting plate 5
2 is fixed to the rear surface of the door 22. The upper surface of the casing 55 is formed with a slit (first engagement portion) 60 into which the lock plate 42 is fitted with almost no gap in the thickness direction when the lock plate 42 rotates to the horizontal position. . The door 24 is fixed to the door 22 by fitting the lock plate 42 to the slit 60. A pair of inclined surfaces 62 for facilitating the fitting of the lock plate 42 are formed on both sides of the opening of the slit 60.

A lock plate (second lock member) 58 is accommodated in the casing 55 so as to be slidable in the vertical direction. The lock plate 58 has an elongated plate-shaped vertical portion 58B, a horizontal portion 58A that bends and extends in the horizontal direction from the upper end of the vertical portion 58B, and a horizontal direction fixed to the longitudinal center of the vertical portion 58B. It has a spring receiving portion 58C and has an F-shape as a whole. When the lock plate 42 fits into the slit 60, the horizontal portion 58A hits the lock plate 42 and is pushed down, and the lower end of the vertical portion 58B is
5 project downward from the opening 61.
The depressed position is the second locking position.

A projection 59 is formed downward on the spring receiving portion 58C. The protrusion 59 and the casing 55
A spring 64 is interposed between the inner bottom surface and the inner surface. The lock plate 58 is always urged upward by the spring 64, and the horizontal portion 58 a abuts on the upper inner surface of the casing 55 when not pressed down by the lock plate 42. This position is the initial position of the lock plate 58, and in this initial position, the lower end of the vertical portion 58 </ b> B enters the opening 51 without protruding from the opening 51.

The case member 56 has a horizontal stopper 56A. This stopper 56A
Is to limit the downward movement of the lock plate 58 by abutting the horizontal portion 58A,
When the horizontal portion 58A abuts against the stopper portion 56A, the lower end portion of the vertical portion 58B is located slightly above the main plate 26 so as not to abut it.

As shown in FIGS. 1 to 3, the receiving member 70 comprises a rectangular parallelepiped thick stopper portion 76 and thin mounting portions 72 formed on both sides thereof. Each mounting portion 72 is fixed by a screw 74 in a state where the mounting portion 72 is arranged at a position straddling the doors 22 and 24.
When both doors 22 and 24 are closed, when the rear surfaces of the doors 22 and 24 abut against the stopper portion 76, the doors 22 and 24 are closed.
24 are located in the closed position.

The width (width in the front-rear direction) and height of the stopper portion 76 can be adjusted by closing and locking the doors 22 and 24.
The lower end of the vertical portion 58B of the lock receiving mechanism 50 is
3 (see FIGS. 3 and 5). The vertical portion 58 </ b> B is engaged with the rear surface 78 of the stopper 76 to prevent the left door 22 from rotating open. As is clear from this, the rear surface 78 of the stopper portion 76 is the second engagement portion.

In the locking device having the above structure, the doors 22 and 24 can be positioned in the closed position by rotating the opened doors 22 and 24 closed until they hit the receiving member 70. Then, in this state, when a key is inserted into the keyhole 33 of the lock mechanism 28 and a locking operation is performed, the lock plate 42 rotates to a horizontal position and fits into the slit 60 of the lock receiving mechanism 50. Thereby, the door 24 is fixed to the door 22. At the same time, the lock plate 42 is pressed down against the urging force of the spring 64 by the lock plate 42, and the lower end of the vertical portion 58 </ b> B projects downward from the opening 61 to engage with the rear surface 78 of the receiving member 70. Thereby, the door 22 is fixed to the main plate 26. When the door 22 is fixed to the base plate 26, the door 24 is
2, the doors 22 and 24 are fixed to the base plate 26 after all.

To open the closed doors 22, 24, the lock mechanism 28 is unlocked. Then, the lock plate 42 rotates to the vertical position to release the engagement with the slit 60, and the lock plate 58 is pushed up by the spring 64 to release the engagement with the receiving member 70. Thus, the doors 22 and 24 can be opened and rotated.

As described above, in the above locking device,
Both doors 22 and 24 can be fixed or opened and rotated by only one locking operation or unlocking operation. Moreover, in the locked state, the lock plate 58 is
, The door 22 cannot be opened and rotated. Therefore, even if the doors 22 and 24 are strongly pulled, they do not open, and the doors 22 and 24 can be securely fixed.

In a conventional locking device using a hooking mechanism, after opening one door, a door provided with a hook hooking mechanism must be opened, and the opening and closing order is uniquely determined. However, in the locking device of the present invention, both doors 2
Since the unlocking of the doors 2 and 24 is performed at the same time, both the doors 22 and 24 can be opened earlier than the other.

Further, in this embodiment, since the receiving member 70 is provided, both the doors 22 and 24 can be located at the closed position only by turning the doors 22 and 24 until they come into contact with the receiving member 70. In addition, since the closing position is determined by the receiving member 70, it is not necessary to attach a mating member to either of the doors 22 and 24.

Further, since the rear surface 78 of the receiving member 70 is used as the second engaging portion, it is not necessary to separately form the second engaging portion on the main plate 26, and the number of parts can be reduced by that much. The manufacturing cost of the locking device can be reduced.

In the above embodiment, the lock plate 42 is rotated by operating the shaft 31. However, the present invention is not limited to this structure.
As shown in FIG. 7, the first lock member 82 may be slid to fix the doors 22 and 24 to each other. Less than,
This example will be described.

The right door (one door) 24 has a lock mechanism 8
0 is fixed. The lock mechanism 80 includes the cylinder 8
An operation unit 81 including a shaft 2 and a shaft 83 is provided. When a key (not shown) is inserted into the keyhole 84 of the operation unit 81 and locked, the slide plate (first lock member) 85 protrudes toward the left door (the other door) 22 side, and the lock receiving mechanism 86 Is fitted into the engagement hole (first engagement portion) 86A. Then, the slide plate 85 is engaged with the engagement hole 86.
By engaging with A, the door 24 is fixed to the door 22. An inclined surface 8 is provided on the lower surface of the tip of the slide plate 85.
5A are formed.

On the other hand, a lock receiving mechanism 86 is fixed to the left door (the other door) 22. Inside the lock receiving mechanism 86, a lock plate (second lock member) 87 is provided movably in the vertical direction at a position where the tip of the slide plate 85 enters. The lock plate 87 is
An inclined surface 87A corresponding to the inclined surface 85A is provided at the upper end thereof.
And is urged upward by a spring 88 housed in the lock receiving mechanism 86.

When the slide plate 85 enters the lock receiving mechanism 86, the inclined surface 87A is pushed down by the inclined surface 85A, and the lower end of the lock plate 87 protrudes downward from the lock receiving mechanism 86. Of course, the lower end of the lock plate 87 is adapted to engage with the rear surface 78 of the receiving member 70 so that the door 22
Fixed to The other configuration and operation are the same as those of the first embodiment, and the description thereof is omitted.
The same effect as that of the first embodiment can be obtained also by the door lock structure having such a configuration.

In the above two embodiments, since the total length of the lock plates 58, 87 is short, the lock mechanisms 28, 80
Is provided at a lower position close to the main plate 26, but the lock mechanisms 58, 80 may be installed at a higher position by increasing the total length of the lock plates 58, 87. In this way, the locking and unlocking operations can be easily performed. Door 2
Instead of fixing the receiving member 70 to the main plate 26 located below the base plates 2 and 24, the receiving member 70 may be fixed to a door frame (not shown) positioned above the doors 22 and 24. Of course,
In such a case, the lock plates 58 and 87 as the second lock members are arranged so as to extend upward.

In each of the above embodiments, when the locking device is unlocked, the two doors 22 and 24 become rotatable, and there is a risk that they may be opened inadvertently. In order to prevent such inconvenience, the entire receiving member 70 or a part of the front side thereof is formed of a magnetic material, and a magnet is arranged on the rear surfaces of the doors 22 and 24 facing the receiving member 70. The doors 22, 24 may be positioned at the closed position by magnetic force. Of course, a magnet may be arranged on the receiving member 70 and a magnetic body may be arranged on the doors 22 and 24.

[0031]

As described above, according to the first aspect of the present invention, the pair of doors can be securely fixed by only one locking operation, and the pair of doors can be securely locked by one unlocking operation. Both doors can be pivotable. Therefore, the labor of locking and unlocking operations can be reduced. Moreover,
The effect that the pair of doors can be opened and closed in any order can be obtained. According to the second aspect of the present invention, by rotating the pair of doors until they hit the receiving member, the pair of doors can be located at the closed position. Therefore, the closing operation can be performed more easily. Further, according to the third aspect of the present invention, since the second engaging portion is formed on the receiving member, it is not necessary to separately provide the second engaging portion, and the manufacturing cost of the locking device is reduced by that much. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a double door locking device according to the present invention.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a rear view of the embodiment.

FIG. 4 is a sectional view of a main part of the embodiment.

FIG. 5 is a sectional view of the lock receiving mechanism of the embodiment.

FIG. 6 is a front view of another embodiment of the present invention.

FIG. 7 is a front view showing a conventional double door locking device.

FIG. 8 is a diagram for explaining a problem of a conventional double-door locking device.

[Explanation of symbols]

 22 Left door (other door) 24 Right door (one door) 26 Main plate (support) 28 Lock mechanism 30 Operation part 42 Lock plate (first lock member) 50 Lock receiving mechanism 58 Lock plate (second lock member) Reference Signs List 60 Slit (first engaging portion) 70 Receiving member 78 Rear surface of receiving member (second engaging portion) 80 Lock mechanism 81 Operating portion 85 Slide plate (first lock member) 86 Lock receiving mechanism 86A Engagement hole (first Engagement part) 87 Lock plate (second lock member)

Claims (3)

(57) [Claims] 1. A locking device for locking a pair of open and closed doors of a pair of doors to a closed position, wherein the pair of doors is attached to a support so as to be openable and closable, and a lock attached to one of the doors A lock receiving mechanism attached to the other door, wherein the lock mechanism is moved from an initial position to a first locked position by an operation unit for performing a locking operation and a locking operation on the operation unit, A first lock member that is moved from a first locked position to an initial position by an unlocking operation on an operation unit, wherein the lock receiving mechanism is engaged with the first lock member that has been moved to the first locked position. A first engagement portion for preventing the one door from rotating from the closed position to an open position,
When the first door is moved from the initial position to the second locked position by the first lock member that moves to the first locked position, the second door is engaged with the second engaging portion provided on the support, and the other door is closed. And a second lock member that moves from a second locked position to an initial position in interlock with the release of the first lock member from the first engagement portion. Double door locking device. 2. The support member according to claim 1, wherein the support member is provided with a receiving member that positions the pair of doors at a closed position by abutting the pair of doors that close and rotate. Double door locking device. 3. The both receiving device according to claim 2, wherein the receiving member is provided with a second engaging portion that engages with the second locking member moved to the second locking position. Open door locking device.