JP2002349104A - Picking preventing device for door knob - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-priced picking preventing device for a door knob for directly protecting a key hole from the unlocking act by picking and capable of corresponding to various door knobs. SOLUTION: A pair of a first and a second cover parts 21 and 22 respectively formed of a semi-cylindrical body are connected to each other through a connection part 6 freely to be turned. The door knob H is covered with each cover part 21 and 22 over all direction to protect the door knob H including the key hole K from picking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing unlocking by picking, and more particularly, to a device for preventing picking of a door knob for preventing a picking tool from being inserted into a keyhole.

[0002]

2. Description of the Related Art Recently, newspapers and the like frequently report the damage of burglary caused by "picking". The term “picking” refers to inserting a wire-like metal fitting into a keyhole, illegally unlocking a key, and entering a nest.

[0003] As a method of preventing picking damage,
The following methods are typical examples, whether directly or indirectly. (1) Replace the cylinder with a type that cannot be picked. (2) Attach a new key separately from the normal door key. (3) An alarm device that detects vibration of picking and emits an alarm sound is attached. (4) Install security cameras and automatic lighting lights near the doors.

[0004]

However, the methods (1) to (4) have the following problems. That is, while the method (1) can surely prevent picking, the cost of the cylinder itself is high due to the complicated key pattern, and the cost of key copying is several times that of the conventional key. Take it. In addition, cylinders cannot be changed without permission in rental housing and the like.

[0005] The method (2) is a method of indicating intention only. In practice, since both keyholes are always exposed, it cannot be denied that picking is possible with time. In the above method (3), picking can be performed if care is taken so that vibration is not sensed. In many cases, the battery is driven. Absent.

In the above method (4), the cost of the security camera is as high as 20 to 40,000 yen, and the installation place is limited.
In addition, the self-lighting type light requires a new installation place on a wall surface or the like, and the rechargeable battery-type light may cause the battery to run out.

Accordingly, the present invention has been made to solve the above-mentioned problem, and an object of the present invention is to directly prevent a keyhole from being unlocked by picking,
It is an object of the present invention to provide an inexpensive doorknob picking prevention device that is compatible with various doorknobs.

[0008]

In order to achieve the above object, the present invention provides a door knob picking prevention device for protecting a door knob provided on a door and a predetermined locking means from an unauthorized unlocking operation. Consisting of a hollow half-cylinder
One end parallel to the axial direction is rotatably connected, and the other end is abutted against each other to form first and second cover portions that form a space in which the door knob can be stored. Each of the cover portions is integrally attached to one end in the axial direction thereof, and has a disk-shaped projecting lid portion that is overlapped with each other when closed. And a locking portion for locking each cover portion in a closed state is provided, and the flange portion is smaller than an outer diameter of the door knob, and a door knob shaft of the door knob. It is characterized by having an inner diameter larger than the shaft diameter.

According to this, since the door knob and the keyhole are covered from all directions by the cover portion, it is possible to prevent the picking tool from being inserted into the keyhole. further,
Since the lid that covers the keyhole has a double structure, even if one of the lids is pryed open, the keyhole can be protected by the other, and the time to reach the keyhole can be increased.

Here, the first and second cover portions allow the lever to protrude out of the cover portion so that the door knob is used for a lever-type door knob provided with a lever orthogonal to the rotation direction. Notch is provided.

The door knob and the locking means are provided separately from the door for a door knob, and one of the first and second cover portions includes:
It is preferable to provide a third cover portion for exclusively covering the locking means. According to this, even if the third cover portion is broken and unlocked, the first and second cover portions are opened.
Since the cover covers the door knob, the door knob cannot be grasped by hand and the door cannot be opened.

[0012] In order to further improve the crime-prevention property, there is further provided a sensing means for sensing an abnormal state of the cover, and an alarm means which is ON / OFF controlled by the sensing means. Here, it is preferable that the sensing means includes an opening / closing operation switch that operates by opening and closing the cover, and a vibration operation switch that operates by vibration of the cover.

According to a second aspect of the present invention, there is provided a door knob picking prevention device for protecting a door knob provided on a door and a predetermined locking means integrally provided on the door knob from an unauthorized unlocking operation. A cover body having a space in which the door knob can be housed, wherein the cover body is rotatably connected at one end parallel to a rotation axis of the door knob, and the free ends are abutted against each other. The first having the above space formed inside
And one of the axial ends of each of the cover portions, wherein one of the cover portions faces the other of the cover portions so as to cover the locking means. An overhanging lid is provided, and the other end in the axial direction of each cover is bent toward the center thereof, smaller than the outer diameter of the door knob, and the door knob shaft of the door knob. A flange portion having an inner diameter larger than the shaft diameter is provided, and a lock portion for locking each of the cover portions in a closed state is provided on a free end side of each of the cover portions. .

The cover body may be composed of at least two or more divided bodies including the first and second cover parts, for example, three divided parts.

[0015]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a perspective view of the door knob picking prevention device according to the embodiment, and FIGS. 2 and 3 are a front view and a side sectional view of a state where the door knob picking device is attached to the door knob.

The picking device 1 for a door knob has first and second first and second semi-cylindrical bodies each having a hollow interior.
It has a pair of cover portions 21 and 22, and these cover portions 21 and
One end side parallel to the axial direction of 22 is rotatably connected by the connecting portion 6. In this embodiment, a trillion number is used for the connecting portion 6.

Each of the cover parts 21,
A space in which the door knob H (see FIG. 2) can be housed is formed by facing the other ends of the 22 parallel to each other in the axial direction.

In the first embodiment, the first and second cover portions 21 and 22 are respectively formed symmetrically. As shown in FIG. 2 and FIG.
The inner diameter and the shaft length of the door knobs 1 and 22 are slightly larger than the outer diameter and the shaft length of the door knob H, so that the door knob H can be stored in the hollow interior.

One end of the first and second cover portions 21 and 22 in the axial direction, that is, the door knob H shown in FIGS.
On the side opposite to the keyhole K, a lid 3 for closing the keyhole K is provided.
1, 32 are provided integrally. Each lid 31, 32
Are formed in a disk shape drawn by the virtual radius of each of the cover portions 21 and 22, respectively, and cover the semicircular hollow portions on one end side of the cover portions 31 and 32, and further project in a semicircular shape.

In the first embodiment, each of the lids 31,
The keyholes 32 are arranged parallel to each other when the covers 21 and 22 are overlapped in a cylindrical shape.
Is formed with a double lid structure on the front surface of the.

The other end of the first and second cover portions 21 and 22 in the axial direction, that is, the side opposite to the door knob shaft S of the door knob H shown in FIG. Parts 41 and 42 are bent. Openings 410.420 through which the door knob shaft S can be inserted are formed integrally at the centers of the flanges 41 and 42, respectively.

In the first embodiment, the flange 4
The opening portions 410 and 420 of the doorknobs 1 and 42 are set smaller than the outer diameter of the doorknob H and larger than the shaft diameter of the doorknob shaft S. According to this, as shown in FIGS.
The entry of the first and second doors 42 between the door surface D and the door knob H prevents axial dropout.

The other end of each of the covers 21 and 22 parallel to the axial direction, that is, the opposite side of the connecting portion 6, is provided with the covers 21 and 22.
Lock part 51 for locking in a state where
52 are integrally formed.

In the first embodiment, the lock 5
Reference numerals 1 and 52 each have a flange shape protruding in the radial direction of the cover portions 21 and 22, and an insertion hole 51 through which a locking means (not shown) such as a latch portion of a padlock is inserted at the center.
0,520 are provided.

In the first embodiment, the cover 2
1 and 22, the lids 31 and 32, the flanges 41 and 42, and the locks 51 and 52 are formed by integrally molding a single metal plate by press molding. May be integrally formed, and the forming method is not particularly limited.

Next, a method of using the door knob picking prevention device 1 will be described with reference to FIGS. First, each of the covers 21 and 22 is opened via the connecting portion 6, and one of the covers (the second cover 3 in the first embodiment) is opened.
2) from the right side of the doorknob H.

Thus, the front side of the door knob H (keyhole K
The door knob H is closed by the lid portion 32, and the rear end side (door surface D side) of the door knob H is closed by the flange portions 41 and 42, respectively.

Next, the first cover part 21 is rotated toward the second cover part 22 via the connecting part 6. As a result, the keyhole K side of the door knob H is further closed by the lid portion 31, and the flange portions 41 and 42 are formed on the rear end side of the door knob H along the periphery of the door knob shaft S by the door surface D and the door knob H. Protruded between.

Finally, the insertion holes 510, 52 of the lock portions 51, 52 provided on the butting surfaces of the cover portions 21, 22 are provided.
For example, the door knob H can be covered from all directions by inserting a latch of a padlock into the 520 and locking it.

According to this, since the keyhole K of the door knob H is double guarded by the lids 31 and 32, even if one lid 31 is pryed open with a bar or the like, the other lid is opened. 32 are further prepared, so that not only it takes time to reach the keyhole K, but also it is possible to decrease the will of the criminal.

In the first embodiment, the lock 5
There is no particular limitation on the lock means attached to the first and second locks 52, but it is preferable that the lock is a lock that cannot be picked if possible. Further, the lock means may be provided integrally with the lock portions 51 and 52, and such a mode is also included in the present invention.

In order to further enhance the crime prevention effect, it is preferable to incorporate the alarm generating means 7 into the door knob picking prevention device 1 as shown in FIG. As a specific configuration, an opening / closing operation switch 71 that operates by opening and closing and a vibration operation switch (vibration sensing means) 72 that detects picking vibration are provided at the open ends of the cover portions 21 and 22, and these alarms such as a buzzer are provided. By interlocking with the generating means 73, an alarm sound is generated when it is forcibly destroyed by picking.

Although not shown, the alarm generating means 7 may be additionally provided with a discriminating means such as a number lock type or a timer type in order to determine whether the user is a user. Such an embodiment is also included in the present invention.

FIGS. 5 and 6 show a second embodiment of the picking prevention device for a door knob according to the present invention. The door knob picking prevention device 10 is a lever type in which a door knob H has a lever L orthogonal to the rotation direction thereof, and is used exclusively for a lever type door in which a keyhole K is independent of the door knob H.

The basic structure of the first and second cover portions 21 and 22 is almost the same as that of the above-described embodiment,
A cutout hole 220 for pulling out the lever L to the outside is provided on a side surface of the cover portion 22. In the second embodiment, the cutout portion 220 is provided on the side surface of the second cover portion 22. For example, a U-shaped cutout portion is formed on the abutting surfaces of the first cover portion 21 and the second cover portion 22. The notch 220 may be formed by arranging them and abutting them.

In the second embodiment, the cover 2
On the lower side of the first and the second 22, a third cover portion 23 hanging in parallel along the door surface D is provided. Third cover 23
Consists of a box-shaped body with the door surface side D side opened,
Like the second cover portions 21 and 22, the second cover portions 21 and 22 are formed from a single metal plate press-formed body.

The third cover 23 is provided to protect the keyhole K independently provided on the door surface D. That is, as shown in FIG. 6, the first and second cover portions 21,
22 covers the doorknob H and the third cover 2
3 has a structure that covers a large amount of the upper surface of the keyhole K.

In the second embodiment, the third cover portion 23 is formed such that its depth is greater than the height of the projection of the keyhole K. Further, the first and second cover portions 2 are formed.
The opening end of the third cover portion 23 is set to be lower than the protrusion height of the keyhole K than the maximum movement amount of the flange portions 41 and 42 in the axial direction.

According to this, the keyhole K can be reliably protected, and even if the third cover portion 23 is broken and picking is damaged, the first and second cover portions 21 and
Since the door knob H is held non-rotatably by 22, a secondary preventive effect is also achieved. It goes without saying that the above-described alarm generating means 7 may be separately provided in the door knob picking prevention device 10 of the above embodiment.

FIG. 7 is a perspective view of a door knob picking prevention device according to a third embodiment of the present invention.
In the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted. The picking prevention device 100 for a doorknob is obtained by bringing the first embodiment into a state closer to the product level. In a closed state, the internal space of each of the cover portions 21 and 22 has a free end side (an anti-connection portion 6). Side), which is a so-called oval shape (see FIG. 8).

In the third embodiment, as in the first and second embodiments, each of the cover portions 21 and 22 is provided.
Are provided on one end side in the axial direction of the door knob H and cover portions 31 and 32 for protecting the keyhole K of the door knob H, and on the other end side are flange portions 4 arranged along the outer peripheral surface of the door knob shaft S of the door knob H.
1, 42 are provided upright. Flange part 41,
Since the basic configuration of 42 is the same as in each embodiment,
The description is omitted.

Each of the lids 31 and 32 has a projecting portion 3 in which one of the lids (the lid 31 in this embodiment) is extended in a semicircular shape.
11, and the other lid (the lid 32 in this embodiment) is provided with a notch 320 so as to conform to the overhang 311 in shape.

In the third embodiment, the lids 31, 3
2 is provided with a semicircular overhang 311 on one side and a cutout 320 serving as a receiver of the overhang 311 on the other side, and the shape of the lids 31 and 32 is, for example, half moon. The shape is not particularly limited as long as it is formed so as to cover at least the keyhole surface in a closed state such as a shape.

On the inner surface side of the lid 32, a reinforcing plate 321 for reinforcement is provided one step lower than the end along the outer shape of the end of the lid 32. Due to this step, a groove 322 is formed between the lid 32 and the reinforcing plate 321. According to this,
When each of the covers 31 and 32 is closed, the overhang 311
Are accommodated along the groove 322, and the butting surfaces overlap according to the step width of the lid portion 32, so that the front side (the surface against the keyhole) is more firmly protected.

Further, the periphery of the first cover 21 is formed one step higher so as to enter along the inner periphery of the second cover 22. According to this, in the closed state, not only the front surface side but also the entire mating surfaces of the respective cover portions 21 and 22 are protected, so that it is possible to more reliably prevent a screwdriver or the like from being inserted and pryed open.

Referring to FIG. 8 as well, lock holes 210 and 220 for attaching a padlock or the like are formed in the side surfaces on the free ends of the first and second covers 21 and 22. According to this, the anti-picking device 100 for a doorknob is attached to the doorknob H, and the opposing lock holes 21 are attached.
By inserting the lock of padlock L into 0,220,
Opening and closing of each cover part 21 and 22 is locked.

In the third embodiment, the lock means comprises lock holes 210 and 220 and a padlock L. In addition to this, for example, as shown in FIG. It may be attached in a special manner. The lock device 8 is a dial lock type lock device which is often used as a lock means for, for example, an attache case or a travel bag.
1 is restricted.

In this embodiment, the lock device 8 is
It is integrally attached to the lower side of the second cover part 22, and the dial rotation surface is exposed on the outer peripheral surface. On the first cover portion 21 side, an engagement portion 211 with which the lock claw 81 of the lock device 8 is engaged is provided integrally, and when the engagement portion 211 and the lock claw 81 are engaged, Opening and closing of each cover part 21 and 22 is regulated. Such an embodiment is also included in the present invention.

FIG. 10 shows a modification of the third embodiment. This picking prevention device 10 for a door knob
Numeral 0 is composed of three cover portions 21, 22, 23 as a whole. That is, the first and second cover portions 21,
A third cover portion 23 is interposed between the connection ends of the pair 22 via the connection portions 6a and 6b.

According to this, each of the covers 21, 22, 2
3 is finely divided so that the opening angle of the cover can be made large, so that the mountability to the door knob is improved. The above modification is applied to the third embodiment, but may be applied to the first and second embodiments if possible. Such an embodiment is also included in the present invention.

In each of the above-described embodiments, the cover portions 21 and 22 constitute a cylindrical body cover by combining a pair of semi-cylindrical bodies. In this case, the respective cover portions 21 and 22 may abut a U-shaped prism.

Although this picking prevention device for a door knob is formed by pressing a metal plate into a single piece, it may be made of a synthetic resin such as reinforced plastic if a predetermined strength can be obtained. Is not particularly limited.

Note that the picking prevention device for a door knob of the present invention may be used not only during absence but also at home. That is, since the doorknob can be operated only from the indoor side by being attached to the doorknob even while at home, it is possible to prevent unauthorized entry or mischief by others.

[0054]

As described above, according to the present invention,
Inexpensive and easy to install without drilling holes or replacing cylinders on existing doors.By combining a pair of semi-cylindrical bodies with each other, the entire door knob, especially the keyhole part, is firmly covered, There is no danger of the picking tool being directly inserted into the keyhole, and even if it is destroyed, it takes time, so that an effective protective action is achieved.

Further, by providing an alarm generating means which operates by destruction or picking vibration, higher security can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a door knob picking prevention device according to a first embodiment of the present invention.

FIG. 2 is a front view showing an attached state of the picking prevention device for a door knob according to the first embodiment.

FIG. 3 is a side sectional view showing an attached state of the door knob picking prevention device of the first embodiment.

FIG. 4 is an explanatory diagram for explaining a state in which an alarm generating unit is attached.

FIG. 5 is a second illustration of the picking prevention device for a door knob of the present invention.
FIG. 1 is a front view showing an embodiment.

FIG. 6 is a side sectional view of the second embodiment.

FIG. 7 is a perspective view of a door knob picking prevention device according to a third embodiment of the present invention.

FIG. 8 is a schematic view showing a state where the picking prevention device for a door knob according to the third embodiment is mounted.

FIG. 9 is an explanatory diagram for explaining a mounting position of the lock device.

FIG. 10 is a front sectional view showing a modification of the third embodiment.

[Explanation of symbols]

 1, 10 Picking prevention device for door knob 21 First cover part 22 Second cover part 220 Notch part 23 Third cover part 31, 32 Cover part 41, 42 Flange part 410.420 Opening part 51, 52 Lock part 510.520 Insertion Hole 6 Connecting part 7 Alarm generating means 71 Opening / closing operation switch 72 Vibration operation switch 73 Buzzer Lock device D Door surface H Doorknob K Keyhole L Lever S Doorknob shaft

Claims (8)

[Claims] An anti-picking device for a doorknob for protecting a doorknob provided on a door and a predetermined locking means from an unauthorized unlocking operation, comprising: a pair of hollow semi-cylindrical members; A first and a second cover portion are formed such that a parallel one end side is rotatably connected and a space in which the door knob can be housed by abutting the other end sides with each other,
Each of the cover portions is integrally attached to one end in the axial direction, and has a disk-shaped projecting lid portion that is overlapped with each other when closed. A bent flange portion and a lock portion for locking each of the cover portions in a closed state are provided, and the flange portion is smaller than an outer diameter of the door knob, and an axis of a door knob shaft of the door knob. An anti-picking device for a doorknob, characterized by having an inner diameter larger than the diameter. 2. The door knob for a lever-type door knob provided with a lever orthogonal to the direction of rotation thereof, wherein the lever is provided at the other end of the first and second cover portions outside the cover portion. 2. The picking prevention device for a doorknob according to claim 1, wherein a notch portion is provided for projecting the doorknob. 3. A door knob in which the door knob and the locking means are separated from the door, and one of the first and second cover portions is provided with the locking means exclusively. The picking prevention device for a door knob according to claim 1 or 2, further comprising a third cover portion for covering and hiding. 4. The doorknob according to claim 1, further comprising a sensing unit for sensing an abnormal state of the cover unit, and an alarm unit that is ON / OFF controlled by the sensing unit. For picking prevention device. 5. The pick-up preventing device for a door knob according to claim 4, wherein the sensing means comprises an opening / closing operation switch which is operated by opening / closing the cover. 6. The pick-up preventing device for a door knob according to claim 4, wherein said sensing means comprises a vibration operation switch which operates by vibration of said cover portion. 7. A doorknob picking prevention device for protecting a doorknob provided on a door and a predetermined locking means integrally provided on the doorknob from unauthorized unlocking operation, wherein the doorknob can be housed therein. The cover body has one end parallel to the axis of rotation of the door knob and is rotatably connected along the axis of rotation of the door knob. The first cover and the second cover, and one of the axial ends of each of the covers is provided with one of the covers so as to cover the locking means. A lid portion is provided that projects toward the center of the door knob, and the other end of each of the cover portions in the axial direction is bent toward the center thereof and smaller than the outer diameter of the door knob. A flange portion having an inner diameter larger than a shaft diameter of a door knob shaft of the door knob is provided, and a lock portion for locking each of the cover portions in a closed state is provided on a free end side of each of the cover portions. An anti-picking device for a doorknob. 8. The cover body includes the first and second cover bodies.
The picking prevention device for a doorknob according to claim 7, comprising at least two or more divided bodies including a cover portion.