JP3169481B2 - Unlock prevention device by key - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key which is fitted to a lock mounting plate of a door, closes a key hole, prevents rotation of a handle, and prevents an unauthorized person from opening the door. The present invention relates to an unlocking prevention device.

[0002]

2. Description of the Related Art A door lock for an entrance of a house or the like generally employs a cylinder lock disposed below the door handle. The door lock is unlocked by a predetermined key, the handle is turned to release the notch, and the door is opened.

[0003]

However, if a key is lost, the key may be illicitly unlocked by a person who has illicitly acquired the key, causing harm such as theft. Further, since the door lock is directly attached to the door and its key hole is exposed to the outside, there is a danger of unauthorized unlocking using a tool other than the spare key. In addition, when a renter does not pay a fixed rent to a landlord for a long period of time in a rental house or the like, the renter may want to prevent the renter from moving in.
However, conventional door locks can be unlocked and moved in at any time with the proper key.

It is an object of the present invention to close a key hole of a door lock and prevent rotation of a door handle to prevent an unauthorized person from opening the door.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and a handle mounting plate provided with a door handle and a cylinder lock is provided with the entire outer surface of the handle mounting plate by a handle portion of the handle. A dish-shaped unlocking prevention cover plate provided with a U-shaped groove through which the shaft of the door handle fits so as to cover except for a hinge portion at one end, and a lock body insertion hole at the other end, A main body which is integrally formed along the U-shaped groove of the cover plate, and which is attached to the main body via a hinge, cooperates with the U-shaped groove of the main body, and prevents rotation of the door handle. A holding plate serving as a lid of the main body to be locked, and a lock main body that locks and unlocks the main body is attached to the holding plate.

[0006]

[Function] An unlock prevention cover plate is attached to the outer surface of a handle mounting plate on which a door lock and a handle are projected so that a handle shaft portion is inserted. Cover the whole. Then, when the holding plate is closed and unlocked with the handle shaft portion inserted into the U-shaped main body protruding from the surface of the cover plate, the handle side is placed between the U-shaped main body and the holding plate. Become sandwiched. Even if the handle does not rotate, it collides with the main body or the holding plate, and the rotation of the handle is prevented. Since unlocking can be prevented, security is improved without being opened illegally.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a key unlocking prevention device according to the present invention. In the figure, 1 is a door and 2 is
Is a door handle attachment plate attached to this door 1,
Generally, a handle 3 and a cylinder lock 4 are mounted on the handle mounting plate 2. The door handle mounting plate 2 is buried in a predetermined position of the door 1 so that the door handle 3 is rotatable so as to protrude from the surface of the door, and the key hole of the cylinder lock is exposed so that the cylinder lock 4 is exposed.
On the handle mounting plate 2. As the shape of the door handle 3, various shapes other than the illustrated embodiment are employed, and the door handle 3 is freely rotated at a predetermined angle with respect to the mounting plate 2, and the door handle is rotated by the door handle to rotate the door handle. The notch provided is protruded and retracted, and is locked and opened by the notch receiver on the frame side, or the door is opened by releasing the lock. The mechanism for operating the notch by the rotation of the door handle 3 and the cylinder lock are provided on the door via the mounting plate in the same manner as in the prior art.

In order to prevent unlocking by the key, an unlocking prevention cover plate 5 is fitted so as to cover the entire outer surface of the handle mounting plate 2 provided with the door handle 3 and the cylinder lock 4 except for the handle portion of the handle. Combine. In this case, since the handle mounting plate 2 slightly protrudes from the surface of the door 1 as shown in FIG. 1, the shape of the unlock prevention cover plate 5 is completely covered including the peripheral side surface of the handle mounting plate 2. Is a dish shape having the outer shape of the handle mounting plate. The unlocking prevention cover plate 5 has such a strength that it cannot be easily opened by a screwdriver or other tools, and is desirably wrapped around the door surface and the handle mounting plate without rattling.

A U-shaped unlocking main body 6 is fixed to the unlocking prevention cover plate 5 with a screw. This is performed by forging, casting, or pressing with a required metal or the like, and inserting the shaft portion 3S of the door handle 3 into the U.
A bottom plate 61 formed with a U-shaped door handle insertion groove 6M,
A peripheral wall 62 protruding along the outer periphery of the bottom plate 61 to a required height in accordance with the amount of projection of the door handle, a hinge 63 on one of the opposing side surfaces of the peripheral wall 62, and a holding plate 7 on the other side surface. Lock body insertion hole 64 for inserting and locking the lock body 8 on the side.
Respectively formed. As shown in FIGS. 1 and 2, screws B are inserted from the cover plate 5 side and screwed to the floor plate 61 of the main body 6 to fix the main body 6 and the unlocking prevention cover plate 5 tightly.

A lock body insertion hole 64 of the body 6 is formed in a thicker body peripheral wall 62 so as to be orthogonal to the cover plate 5 and protrudes from a lock body at a part of the inner peripheral surface of the hole 64. Locking hole 6 for hooking and locking locking claw pieces 81, 81
One or more 4Ks are formed. The U-shaped door handle insertion hole 6M of the main body 6 is opened at one end of the main body 6, and its groove width and length are fixed by inserting the cover 5 into the door handle mounting plate 2 from one end of the mounting plate 2. When it is fitted to the door handle, the shaft portion 3S of the door handle is positioned at the bottom of the U-shaped groove.

A pressing plate 7 serving as a lid of the main body 6 is provided on the main body 6 so as to cover the surface of the U-shaped groove except for the shaft portion 3S of the door handle. This is provided with a hinge piece 71 on one end side, and a lock body 8 is attached on the opposite side to the hinge piece,
The hinge piece 71 and the hinge portion 63 on the main body side are engaged with each other by a shaft to form an integral body, and one end of the holding piece 7 prevents the door handle from rotating if necessary. A handle contact piece 72 projecting oppositely at the same height position as the side surface of the portion is provided integrally.

As shown in detail in FIG.
A lock body piece 81 embedded and fixed in the lock body piece, a spindle 82 rotatably abutting on a side surface of the lock body piece and penetrating through the lock body piece 81, a spindle 82 and the lock body piece 81
A magnet piece 83 fitted under a spring pressure into a plurality of holes drilled opposite to each other at a contact surface position of the lock body, and a locking claw that protrudes and retracts radially with respect to the spindle shaft along the outer surface of the lock body at the tip of the spindle. Pieces 84, 84, etc. The magnet pieces 83 to be fitted are arranged in a circumferential direction of one end face of the lock body by appropriately combining and arranging N poles and S poles at predetermined intervals to form a plurality of locks having different numbers. By pressing a key (not shown) in which magnets are embedded according to the arrangement on the side of the spindle head, all magnet pieces are pushed into the lock body piece against spring pressure, thereby allowing the spindle to rotate. The locking claw pieces are made to protrude and retract by rotation of the spindle, and locking or unlocking is performed. The details are described in the registered utility model No. 129792 obtained by the present applicant.
Since it is the same as No. 8
The details are omitted.

The structure of the lock body 8 is merely an example. If the holding plate 7 is closed, the lock body 8 can be locked in the locking hole 6 of the body 6 when the holding plate 7 is closed. It is also possible to adopt.

Accordingly, a method of using the unlocking prevention device using the key configured as described above will be described below. In a rented house, etc., if the resident does not pay the rent, etc. for more than the properly permitted period, or if the landlord forcibly excludes the use, first, the holding plate 7 is opened and the cover plate 5 is opened. Are overlapped so as to cover the mounting plate 2 so that the shaft of the door handle is inserted into the U-shaped groove. This allows the keyhole on the mounting plate to be completely covered by the cover plate. Then, when the pressing plate 7 is closed, the locking claw pieces of the key body 8 are fitted and locked in the locking holes 6K of the main body 6 and locked. As a result, the U-shaped groove is closed, the shaft portion of the door handle is completely surrounded, the cover plate does not come off from the mounting plate 2, and one side of the handle in the turning direction faces the side of the main body 6 or the holding plate 7. Therefore, even if the handle is not rotated, the main body or the holding plate hinders the rotation of the handle. Therefore, even if you have the proper key, you cannot unlock or rotate the handle, and you cannot enter the house in a sly state.

When the unlocking device using the key is to be removed, the lock body 8 can be easily unlocked by unlocking the lock body 8 using the key that is provided in the unlocking device using the key.

[0016]

According to the unlocking device using the key of the present invention, the handle mounting plate provided with the door handle and the cylinder lock covers the entire outer surface of the handle mounting plate except for the handle portion of the handle. A plate-shaped unlocking prevention cover plate provided with a U-shaped groove through which a shaft portion of a door handle to be fitted is inserted, a hinge portion at one end, and a lock body insertion hole at the other end; A main body integrally mounted along the U-shaped groove of the plate, and a main body lid attached to the main body via a hinge portion and cooperating with the U-shaped groove of the main body to prevent rotation of the door handle. Since the holding plate and the lock body that locks and unlocks the main body are attached to the holding plate, it can be easily attached to the door without using any tools, and the regular key can be used. Even if you have it, do it on the handle mounting plate. It means that the keyhole of the cylinder lock provided with another position is completely covered and a handle,
A key cannot be used, and rotation of the door handle is prevented, so that there is an advantage that unauthorized unlocking and entering can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an attached state of an unlocking prevention device using a key according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of an unlocking prevention cover plate.

FIG. 4 is a cross-sectional view showing a relationship between a holding plate and a main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Handle mounting plate 3 Door handle 3S shaft part 4 Cylinder lock 5 Unlock prevention cover plate 6 Main body 6M U-shaped door handle insertion groove 64 Lock main body insertion hole 7 Holding plate 8 Lock main body

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05B 13/00

Claims (1)

(57) [Claims] 1. A U-shape in which a shaft portion of a door handle is inserted into a handle mounting plate provided with a door handle and a cylinder lock so as to cover the entire outer surface of the handle mounting plate except for a handle portion of the handle. A dish-shaped unlocking cover plate provided with a groove, a hinge portion on one end side, and a lock body insertion hole formed on the other end side are integrally formed along a U-shaped groove of the cover plate. A main body which is attached to the main body via a hinge portion, cooperates with a U-shaped groove of the main body, and serves as a lid of the main body for preventing rotation of the door handle. And an unlocking device using a key, wherein a lock body for unlocking is attached.