JP2884150B2 - Door locking and unlocking equipment for furniture, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for rotating a latch shaft by operating a handle provided on a door, and engaging and disengaging a latch connected above and below the latch shaft with a locking hole of a furniture body. The present invention relates to a door locking / unlocking device for furniture or the like that can restrain or release the restraint in a closed state.

[0002]

2. Description of the Related Art A conventional locking and unlocking device for a door such as a locker locks the door in a closed state by engaging latches provided at upper and lower ends of the door with locking holes of a furniture body such as the locker. And by operating the handle provided on the surface of the door,
By rotating the latch shaft, the latches fixed to the upper and lower ends of the latch shaft are disengaged from the locking holes, and the door can be opened.

[0003]

However, in the above-mentioned conventional locking and unlocking device, the door is opened by engaging the latches provided at the upper and lower ends of the door with the locking holes of the furniture body. , The middle part of the door is in a free state, and in the high locker door,
There is a possibility that the locked state may be released by bending the middle part of the door, which is not preferable for crime prevention.

In a conventional locking device such as a locker, a means for preventing rotation of a latch shaft and a means for preventing sliding of a dead bolt projecting from a door and engaging with an insertion hole in a housing. Since it is a separate body, the configuration is complicated and the operation is troublesome.

Further, the conventional locking / unlocking device is complicated in construction and operation, is troublesome in operation, and requires considerable force for operation.

The present invention has been made in view of the above-mentioned problems of the prior art, and prevents bending of a door in a locked state, thereby reliably maintaining the locked state, and has a simple structure. It is another object of the present invention to provide a door locking and unlocking device for furniture and the like which can be operated smoothly with light power.

[0007]

An apparatus according to the present invention for achieving the above object comprises a door (1) pivotally attached to a furniture body (2) by a vertical hinge, and a door (1). ), A horizontal rod (3c) extending toward the open end of the door (1) on a handle (3b) located in the escutcheon (4). Horizontal rod (3c)
A handle (3) pivotally attached to the escutcheon (4) with a vertical axis (3a) and having a locking piece (3d) at the tip of a horizontal rod (3c); and a door (1). The furniture body is inserted through the upper and lower ends of the open side and the escutcheon (4), forming a square cross-section and facing up and down.
A latch shaft (5) to which a latch (6) having a latch claw (6a) that can be engaged and disengaged is secured to a locking hole (2b) provided in (2), and a locking piece (3) of the handle (3). Immediately after 3d), door (1)
A first projection (7a) facing the open side of the first and a second projection facing the rear.
(7b), and a handle (3) of the latch shaft (5).
Transmission tube (7) fixed to the part including
(3) A stopper (9a) which is disposed on the rear side, is long in the left-right direction, is directed forward in the middle, and has a vertically long hole (9b) formed on the opposite side of the open end of the door (1). The open end side of the door (1) has a guide hole (1b) provided in the door (1) and the furniture body.
A left and right slidable dead bolt (9) which can be inserted into the insertion hole (2c) provided in (2), and an escutcheon
It has a key lever (8b) attached to (4) and rotated by key operation on the back side, and has a key lever (8b)
It protrudes backward and has a vertically long hole (9b) of the dead bolt (9).
Cylinder lock with a pin (8c) protruding from the cylinder lock
(8), the length of the first protruding piece (7a) and the second protruding piece (7b) from the center of the latch shaft (5) is determined by the vertical axis (3a) of the horizontal rod (3c). It is smaller than the distance between the center and the locking piece (3d). By operating the cylinder lock (8), the dead bolt (9) is slid left and right, and this is inserted into the insertion hole in the furniture body (2). (2c), and when the dead bolt (9) is protruded and locked in the insertion hole (2c), the stopper portion (9a) of the dead bolt (9) becomes the second projecting piece (7b). , The transmission cylinder (7) and thus the latch shaft (5) are turned into a locked state, and the first projecting piece (7a) of the transmission cylinder (7) is
(3d), the horizontal rod (3c) and thus the handle (3) cannot be turned. When the dead bolt (9) is retracted, the stopper (9a) is brought into contact with the second projection (7b). ), The handle (3) and the transmission cylinder (7) are allowed to rotate, whereby the locking piece (3d) at the tip of the horizontal rod (3c) is moved to the first projecting piece (7).
Through (a), the transmission cylinder (7) and thus the latch shaft (5) are rotated to unlock.

[0008]

In the closed state where the latch is engaged with the locking hole,
When the locking operation of the cylinder lock is performed, the dead bolt is engaged with the insertion hole of the furniture main body, and the stopper portion prevents the latch from rotating in the release direction.

In this locked state, the rotation of the latch is prevented by the stopper portion of the dead bolt,
The release operation of the handle is prevented, and the door is locked in the closed position by the engagement of the latch and the dead bolt with the upper and lower locking holes and the insertion hole in the middle part of the furniture body, and the door is elongated in the vertical direction. Even if the size is small, the middle part of the door is unlikely to bend, and the security is improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. A door (1a) of a door (1) pivotally attached to a furniture body (2) such as a locker so that the door can be opened and closed by a vertical hinge is provided with a door.
Escutcheon with handle (3) for opening (1)
(4) is installed.

The handle (3) is moved from the handle (3b) to the door.
The left end of the horizontal bar (3c), which is the open end of (1) and extends to the left in FIG.
And the escutcheon with the vertical axis (3a) at the tip of the horizontal rod (3c) slightly from the center.
It is pivoted to (4).

The upper and lower ends of a latch shaft (5) having a square cross section and penetrating the left and right ends of the left side of the door (1) and the left side of the escutcheon (4) face the door (1). And the furniture body
A latch (6) having a releasable latch claw (6a) is fixedly secured to a locking hole (2b) (see FIG. 6) formed above and below (2),
A transmission cylinder (7) is fixedly fitted to a portion of the latch shaft (5) including the handle (3).

In the middle of a portion of the transmission cylinder (7) penetrating through the upper half of the handle (3), a third portion is located immediately after the locking piece (3d) and faces to the left to engage with it. 1 piece (7
a), a dead bolt (9) to be described later is provided at an intermediate portion of a portion of the transmission cylinder (7) penetrating the lower half of the handle (3).
The rearward projecting pieces (7b), which can be engaged with the frontward stopper portions (9a) provided in the above, are respectively provided so as to protrude.

The length of each of the projecting pieces (7a) and (7b) from the center of the latch shaft (5) is smaller than the distance between the center of the vertical shaft (3a) and the locking piece (3d).

A cylinder lock (8) having a key lever (8b) rotated by a key operation on the back side is fixed to the escutcheon (4).

The dead bolt (9) is provided on the back side of the cylinder lock (8), supported movably in the left and right direction by the escutcheon (4), and provided at an intermediate portion in the vertical direction of the furniture body (2). It is a flat plate that can be engaged with and disengaged from the insertion hole (2c).
(9a) is cut and raised, and a vertically long hole (9b) is formed near the right end.

The cylinder lock (8) has a key hole (8a) on the surface.
And a key lever (8b) on the back side, and the key lever (8
b) has a long hole facing backward and dead bolt (9)
A pin (8c) that slidably engages with (9b) is provided.

When a key is inserted into the key hole (8a) and the key lever (8b) on the rear surface is rotated, the dead bolt (9) is moved in the left-right direction through the pin (8c) and the vertically long hole (9b). Locked position shown in FIG. 4 to be moved and to enter the insertion hole (2c) in the furniture body (2) to prevent the door (1) from opening;
Withdrawing into the door (1), falling out of the insertion hole (2c), the door
The unlock position shown in FIG. 2 is set so that (1) can be opened.

The handle (3) is moved from the state shown in FIG.
When the release operation is performed at the position shown in the figure, the locking piece of the handle (3)
(3d) engages with the first projecting piece (7a) of the transmission cylinder (7) to rotate the latch shaft (5) counterclockwise in FIG. As a result, the latch (6) engaged with the locking hole (2b) of the furniture body (2) is moved from the position indicated by the solid line in FIG. (6a) is detached from the locking hole (2b) so that the door (1) can be opened.

When the door (1) is closed, the latch claw of the latch (6) is opened.
When the key (not shown) is inserted into the key hole (8a) of the cylinder lock (8) in the state where (6a) is engaged with the locking hole (2b), the dead bolt (9) is It is moved to the left from the position shown in FIG. 2, and its tip is the guide hole of the door (1).
(1b), engages with the insertion hole (2c) of the furniture main body (2), and has its stopper portion (9a) within the rotation locus of the second projecting piece (7b) of the projecting member (7). To prevent rotation of the latch shaft 5 in the release direction (FIG. 4).

In this locked state, the dead bolt
Since the rotation of the latch shaft (5) is prevented by the stopper (9a) of (9), the handle (3) is released and
The door (1) cannot be opened.

The upper and lower latches (6) and the dead bolt (9) in the middle are respectively provided with locking holes in the furniture body (2).
(2b) and the insertion hole (2c) are engaged and locked, so that even if the door (1) is long in the vertical direction, the middle of the door (1) does not bend at the center. , The anti-theft property is enhanced.

When the cylinder lock (8) is unlocked, the second
Dead bolt is formed by the protruding piece (7b) and the stopper (9a).
(9) is moved to the right, disengages from the insertion hole (2c), and the stopper portion (9a) is retracted out of the rotation locus of the second protruding piece (7b) to be in the unlocked state, By operating the handle (3), the door (1) can be opened.

[0024]

(1) A door lock is provided with a cylinder lock having a dead bolt which can be engaged with and disengaged from an insertion hole provided in an intermediate portion of the furniture body by operating a key. When in the locked position engaged with
By providing a stopper that prevents the latch from moving in the release direction, the upper and lower and middle parts of the door engage with the furniture body and prevent the door from moving in the door opening direction. Even in this case, bending of the intermediate portion of the door can be prevented, the locked state can be reliably maintained, and security can be improved.

(2) When the dead bolt is set to the locked position by operating the cylinder lock, the latch is locked and the handle cannot be operated, which is safe.

(3) The length of the first projection and the second projection that rotate integrally with the latch shaft from the center of the latch shaft is smaller than the distance between the vertical shaft and the locking piece of the horizontal rod. With a slight turning operation of the handle, the latch shaft turns greatly,
Reliable unlocking is performed.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of furniture to which the present invention is applied.

FIG. 2 is a cross-sectional view taken along line AA in FIG.

FIG. 3 is a cross-sectional view similar to FIG. 2 when a steering wheel is operated.

FIG. 4 is a transverse sectional view similar to FIG. 2 at the time of locking.

FIG. 5 is a schematic perspective view of a dead bolt.

FIG. 6 is a transverse sectional view taken along line BB in FIG. 1;

FIG. 7 is an overall perspective view of a locker.

[Explanation of symbols]

 (1) Door (1a) Front plate (1b) Guide hole (2) Furniture body (2b) Lock hole (2c) Insertion hole (3) Handle (3a) Vertical axis (3b) Handle (3c) Horizontal rod ( 3d) Locking piece (5) Latch shaft (6) Latch (7) Transmission cylinder (7a) First protruding piece (7b) Second protruding piece (8) Cylinder lock (8a) Key hole (8b) Key lever (9) Dead bolt (9a) Stopper (9b) Vertical hole

Claims (1)

(57) [Claims] 1. A door (1) pivotally connected to a furniture body (2) by a vertical hinge so as to be openable and closable, and an escutcheon (4) attached to a vertical intermediate portion of the door (1). Door (1) on handle (3b) located inside escutcheon (4)
A horizontal rod (3c) extending toward the open end of the horizontal rod.
A handle (3) pivotally connected to the escutcheon (4) with a vertical axis (3a) at the left-right intermediate portion of (3c), and having a locking piece (3d) at the tip of the horizontal rod (3c); It is inserted through the upper and lower ends of the open side of (1) and the escutcheon (4), forms a square cross section, and faces up and down. At the upper and lower ends, the locking holes (2b) provided in the furniture body (2) A latch shaft (5) to which a latch (6) having a releasable latch claw (6a) is fixed, and a door immediately after the locking piece (3d) of the handle (3).
The first projection (7a) facing the open side of (1) and the second projection facing the rear
A projection (7b) and a handle for the latch shaft (5)
A transmission cylinder (7) fixedly fitted to a portion including (3), and a stopper (9a) disposed on the rear side of the handle (3), which is long in the left-right direction, and faces forward in the middle;
A vertically long hole (9b) is formed on the opposite side of the open end of the door (1), and the open end of the door (1) is provided with a guide hole (1b) provided in the door (1) and a furniture body (2). And a slidable dead bolt (9) which can be inserted into the insertion hole (2c) provided in the escutcheon (4), and a key lever (8b ) And projecting rearward from the key lever (8b) to
(9) a cylinder lock (8) having a pin (8c) engaged with a vertically elongated hole (9b), and a latch of the first projection (7a) and the second projection (7b). The length from the center of the axis (5) is determined by the vertical axis (3a) of the horizontal rod (3c).
Is smaller than the distance between the center of the lock and the locking piece (3d), and the dead bolt (9) is
And slide it to the left and right to disengage it from the insertion hole (2c) in the furniture body (2). When the dead bolt (9) is projected and locked in the insertion hole (2c), the dead bolt is (9)
The stopper portion (9a) of the power transmission cylinder (7) is locked by rotating the transmission cylinder (7) and thus the latch shaft (5) via the second projection piece (7b). (7a) locks with the locking piece (3d) to disable the rotation of the horizontal rod (3c) and thus the handle (3), and when the dead bolt (9) is retracted, its stopper (9a) ) Is separated from the second protruding piece (7b) and the handle (3)
And the rotation of the transmission cylinder (7), thereby
The locking piece (3d) at the tip of (3c) is unlocked by rotating the transmission cylinder (7) and thus the latch shaft (5) via the first protruding piece (7a). Door locking and unlocking equipment for furniture etc.