JPH06336865A - Preventing device for unlocking by key - Google Patents

Abstract

PURPOSE:To prevent that an unlawful person opens a door by closing the key hole of a door lock, and check the rotation of a door handle. CONSTITUTION:A handle attaching plate 2 having a door lock 4 and a handle 3 is fixed at a fixed position on the surface of a door 1. A main body 6 is unitedly attached so as to cover the whole outer surface of the handle attaching plate 2 and along the U-shaped groove of an unlocking preventing cover plate 5 provided with the U-shaped groove through which the shaft part 3s of the door handle 3 is inserted. A hinge part is formed on the side of an one end of the main body 6, and a lock body inserting hole 64 is formed on the side of the other end of the main body 6, and a pressing plate 7 is attached to the main body 6 through a hinge. In addition, a lock body 8 for engaging and disengaging with the main body 6 is attached to the pressing plate 7 to cooperate with the U-shaped groove of the main body 6. Thus, since the key hole of the door lock 4 is completely covered by the cover plate 5, a key can not be used, and moreover the rotation of the door handle 3 can be checked by the main body 6 and the pressing plate 7 for preventing unlawful unlocking and tenanting.

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 on 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 In general, a door lock for a front door of a house or the like is provided with a cylinder lock arranged below the handle of the door. The door lock is unlocked by a predetermined key, and the handle is rotated to remove the notch to open the door.

[0003]

However, if the key is lost, it may be illegally unlocked by a person who illegally obtains the key, resulting in the risk of theft or the like. Further, since the door lock is directly attached to the door and its key hole is exposed to the outside, there is a risk of being unlocked illegally by using a tool other than the spare key. In addition, if the renter does not pay the fixed rent to the landlord for a long time in rental housing, etc., he may want to prevent the landlord from moving in.
However, conventional door locks can be unlocked and moved in at any time if they have a legitimate key.

An object of the present invention is to close a keyhole of a door lock and prevent the door handle from rotating so that an unauthorized person cannot open the door.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and a handle mounting plate having a door lock and a handle is fixed to a surface of a predetermined position of a door, and all the handle mounting plates are fixed. An unlocking prevention cover plate provided with a U-shaped groove for covering the outer surface and inserting the shaft portion of the door handle, and integrally attached along the U-shaped groove of the cover plate,
A main body having a hinge portion on one end side and a lock main body insertion hole on the other end side, and a holding plate that is attached to the main body via a hinge and cooperates with the U-shaped groove of the main body to prevent the handle from rotating. The gist is that a lock main body that is configured and that engages and disengages with the main body is attached to this pressing plate.

[0006]

[Operation] An unlocking prevention cover plate is attached to the outer surface of the door lock and the handle mounting plate with the handle protruding so that the handle shaft is inserted, and thereby the door lock including the key hole of the door lock is attached. Try to cover the whole. Then, when the pressing plate is closed and unlocked while the handle shaft is inserted in the U-shaped main body that is projected on the surface of the cover plate, the side surface of the handle is located between the U-shaped main body and the pressing plate. It will be caught. Even if the handle is not rotated, it will collide with the main body or the pressing plate and the rotation of the handle will be blocked, and even if the regular key is used, it will not be unlocked and the rotation of the door handle will also be blocked. Since it is possible to prevent such an unlocking, the safety is improved without being opened illegally.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An unlocking prevention device using a key according to the present invention will be described below with reference to the illustrated embodiment. In the figure, 1 is a door and 2
Is a door handle attachment plate attached to this door 1,
Generally, a handle 3 and a cylinder lock 4 are attached to the handle attachment plate 2. The door handle mounting plate 2 is embedded in a predetermined position of the door 1 so that the door handle 3 is rotatable and protrudes from the door surface, and the key hole of the cylinder lock is exposed.
Can be attached to the handle attachment plate 2. As the shape of the door handle 3, various shapes other than the illustrated embodiment are adopted, 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 to form a door. The notch provided is projected and retracted, and the notch receiver on the frame side is engaged to open the door, or the door is released by unlocking. Providing the notch retracting / retracting mechanism and the cylinder lock by the rotation of the door handle 3 on the door via the mounting plate is performed in the same manner as in the conventional case.

In order to prevent unlocking by a 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. To meet. 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 unlocking prevention cover plate 5 is formed so as to completely cover the handle mounting plate 2 including the peripheral side surface. Is a dish having the outer shape of the handle mounting plate. The unlocking prevention cover plate 5 has such strength that it cannot be easily opened by a screwdriver or other tool, and is preferably wrapped around the door surface and the handle mounting plate without rattling.

A U-shaped unlocking prevention main body 6 is fixed to the unlocking prevention cover plate 5 with screws. This is made by forging or casting with a required metal or the like, or processing by pressing, and the shaft portion 3S of the door handle 3 is fitted and inserted U
A bottom plate 61 having a V-shaped door handle insertion groove 6M,
A peripheral wall 62 protruding along the outer periphery of the bottom plate 61 at a required height according to the protruding amount of the door handle, a hinge portion 63 on one side surface of the peripheral wall 62 facing each other, and a pressing plate 7 on the other side surface. Side lock body insertion hole 64 for inserting and locking the lock body 8
Are formed respectively. The main body 6 and the unlocking prevention cover plate 5 are fixed to each other by inserting a screw B from the cover plate 5 side as shown in detail in FIGS.

The lock body insertion hole 64 of the body 6 is formed in the thickened body peripheral wall 62 so as to be orthogonal to the cover plate 5, and a part of the inner peripheral surface of the hole 64 projects from the lock body. Locking hole 6 for locking and locking the locking claw pieces 81, 81
One or two or more 4K are formed. The U-shaped door handle insertion hole 6M of the main body 6 is opened at one end side of the main body 6, and the groove width and the length thereof are fixed by inserting the cover 5 into the door handle attachment plate 2 from one end side of the attachment plate 2. It is determined so that the shaft portion 3S of the door handle is located at the bottom portion of the U-shaped groove when the door handle is fitted into.

A pressing plate 7 serving as a lid of the main body is provided on the main body 6 so as to cover the surface of the U-shaped groove except the shaft portion 3S of the door handle. This is provided with a hinge piece 71 on one end side thereof, and a lock body 8 is attached to the opposite side of 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 so as to be integrated, and one end side of the pressing piece 7 is provided with a grip of the door handle to prevent the door handle from rotating as necessary. A handle abutting piece 72 is integrally provided so as to protrude at the same height position as the side surface of the section.

The lock body 8 is a pressing plate 7 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 the side surface of the lock body piece and penetrating the inside of the lock body piece 81, the spindle 82 and the lock body piece 81.
And a locking claw that is protruded and retracted in the radial direction with respect to the spindle shaft along the outer surface of the lock body piece at the tip of the magnet 83 and the magnet piece 83 that is spring-loaded in a plurality of holes that are bored at the contact surface positions with It is composed of pieces 84, 84 and the like. The magnet pieces 83 to be fitted are arranged in an array by appropriately combining N poles and S poles at predetermined intervals in the circumferential direction of the end face of the lock body to form a plurality of locks having different numbers. A key (not shown) in which magnets are embedded according to the arrangement is brought into contact with the side surface of the spindle head to push all the magnet pieces into the lock body piece against the spring pressure, thereby allowing the spindle to rotate. However, the rotation of the spindle causes the locking claw piece to be retracted and retracted to perform locking or unlocking. For details, refer to Registered Utility Model No. 1297928 (Publication Sho 53-54011) acquired by the applicant. No.), so its details are omitted.

The structure of the lock body 8 is an example, and other structures may be used as long as they can be locked in the locking holes 6 on the body 6 side when the pressing plate 7 is closed. It is also possible to adopt.

Therefore, a method of using the unlocking prevention device using the key configured as described above will be described below. In rented houses, etc., if the resident does not pay rent for more than an appropriately permitted period, or if the landlord wants to forcibly remove the rent, the cover plate 5 must be opened with the holding plate 7 open. Are stacked so that the shaft portion of the door handle is inserted into the U-shaped groove so as to cover the mounting plate 2. This allows the keyhole on the mounting plate to be completely covered by this cover plate. Then, when the pressing plate 7 is closed next, the locking claw pieces of the key body 8 are fitted and locked in the locking holes 6K of the 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 face in the turning direction of the handle faces the side face of the main body 6 or the pressing plate 7. Therefore, even if the handle is not rotated, the main body or the pressing plate interferes with the rotation and the rotation is prevented. Therefore, even if the user has a legitimate key, he / she cannot unlock or rotate the steering wheel, and cannot move in deliberately.

When the unlocking prevention device using the key is to be removed, it can be easily removed by unlocking the lock main body 8 with the key of the unlocking prevention device using the key.

[0016]

According to the unlocking prevention device of the present invention, the handle mounting plate having the door lock and the handle is fixed to the surface of the door at the predetermined position, and the entire outer surface of the handle mounting plate is covered. An unlocking prevention cover plate provided with a U-shaped groove through which the shaft of the handle is inserted, is integrally attached along the U-shaped groove of this cover plate, and has a hinge portion at one end and a lock body insertion hole at the other end. It is composed of a formed main body and a pressing plate that is attached to this main body via a hinge and cooperates with the U-shaped groove of the main body to prevent rotation of the handle, and engages / disengages the pressing plate with the main body. Since the lock body is attached, it can be easily installed on the door without using any tools, and even if you have a regular key, the key hole is completely covered, so you can not use the key, Prevents door handle rotation It is, has the advantage that it is possible to prevent unauthorized unlocking, move to advance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a mounted 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 pressing plate and a main body.

[Explanation of symbols]

 1 Door 2 Handle Mounting Plate 3 Door Handle 3S Shaft Part 4 Cylinder Lock 5 Unlocking 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

Claims (1)

[Claims] 1. A U-shaped groove in which a handle mounting plate having a door lock and a handle is fixed to a surface of a predetermined position of a door so as to cover the entire outer surface of the handle mounting plate, and a shaft portion of the door handle is inserted. An unlocking prevention cover plate provided with a lock body, a main body having a hinge portion at one end side and a lock body insertion hole at the other end side, integrally attached along the U-shaped groove of the cover plate, and a hinge at the main body. It is characterized in that it is attached via a lock plate that is attached via a press plate that cooperates with the U-shaped groove of the main body and prevents rotation of the handle, and that this press plate has a lock main body that engages and disengages with the main body. Unlocking prevention device by key.