JP4236508B2 - Security door - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a security door, and more particularly to a security door having an excellent defense function against thumb-turn picking.
[0002]
[Prior art]
In many picking performed by burglar thieves, a method of unlocking by inserting a wire into a key hole is common. However, as the key structure has been improved and it has become increasingly difficult to unlock with a wire inserted from a key hole, recently a new picking called thumb turn type has appeared. The thumb-turn type picking is to make a through hole with a drill in the peripheral part of the key in the door, insert a thick wire with a bent tip from the through hole, and hook the tip of the wire on the rotation knob of the inner key on the back side of the door Will be unlocked.
[0003]
Although various proposals have been made as defense means against such a new thumb-turn type picking, there is still no effective means.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a security door that can effectively prevent thumb-turn picking.
[0005]
[Means for Solving the Problems]
The crime prevention door of the present invention that achieves the above-mentioned object is a door in which a key for operating the locking claw is embedded in the door body, its key hole is exposed on the front side of the door body, and a rotation knob is projected on the back side. A fabric comprising at least one cut-resistant fiber selected from aramid fiber, wholly aromatic polyester fiber, ultrahigh molecular weight polyethylene fiber, and polyparaphenylene benzobisoxazole fiber so as to surround the key inside the door body , An area filled with a knitted fabric, a nonwoven fabric or a short fiber is provided.
[0006]
Since the security door of the present invention is filled with a woven fabric, a knitted fabric, a non-woven fabric or a short fiber made of cut-resistant fibers in the area around the key, even if an attempt is made to drill a through hole in this area, the cut-resistant fiber Since the wraps around the drill and accumulates without being cut, the rotation of the drill stops, and no further penetrating operation can be performed, and thumb-turn picking cannot be performed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to embodiments shown in the drawings.
[0008]
FIG. 1 is a door according to an embodiment of the present invention, and FIG. 2 is a view taken along the line XX in FIG.
[0009]
The door main body 1 constituting the door of the present invention is configured such that a metal front plate 1a and a back plate 1b are arranged in front and back, and a wooden or resin intermediate plate 1c is sandwiched therebetween. Hinges 2, 2 are attached to one side of the door body 1, and the door body 1 is attached to a frame of a building entrance / exit (not shown) via the hinges 2, 2.
[0010]
A knob 3 and a locking claw 4 adapted to be interlocked with the knob 3 are attached to the opposite side portion of the door body 1. The locking claw 4 always protrudes from the side portion of the door body 1 and engages with a locking hole provided on the doorway frame side to lock the door body 1 so as not to open. When it is rotated, it is immersed in the door body 1 and the lock is released.
[0011]
Further, a key 6 is attached in the vicinity of the knob 3 of the door body 1 so as to penetrate therethrough, and is interlocked with the locking claw 5. The key 6 exposes the keyhole 6a on the front side of the door body 1 and is interlocked with the rotation knob 6b of the inner key on the back side. Therefore, when the key is inserted into the front keyhole 6a and the key 6 is rotated, the locking claw 5 protrudes and retracts from the door body 1 and engages or disengages from the locking hole on the doorway frame side. Further, when the rotation knob 6b on the back side is rotated, the locking claw 5 is also projected and retracted so as to engage with or disengage from the locking hole on the doorway frame side.
[0012]
The door body 1 is formed with a hollow area 7 so as to surround the key 6, and the hollow area 7 is filled with a cut resistant fiber 8 in a fine state. Thus, the cut resistant fiber 8 filled in the cavity region 7 may be a fiber aggregate in which short fibers are randomly dispersed, or may be a woven or knitted fabric or knitted fabric. It may be a nonwoven fabric in which a randomly dispersed web is entangled with a needle punch.
[0013]
Here, the cut resistant fiber refers to at least one fiber selected from aramid fiber, wholly aromatic polyester fiber, ultrahigh molecular weight polyethylene fiber, and polyparaphenylene benzobisoxazole fiber. Although it is desirable that these fibers occupy 100% by weight in the hollow region, it is not always necessary to be 100% by weight, and other fibers may be mixed if at least 50% by weight or more. .
[0014]
As the cut resistant fiber, an aramid fiber is particularly preferable among those exemplified above. Aramid fibers are known to have extremely high cut resistance as well as extremely high tensile strength compared to general polyester fibers and nylon fibers used in clothing and industrial applications. It is widely used in work gloves that handle sharp metal burrs and broken glass. It is also used as a filling cotton for bulletproof vests.
[0015]
In the security door of the present invention , the woven fabric, knitted fabric, non-woven fabric or short fiber made of the cut resistant fiber 8 such as an aramid fiber having such characteristics is filled in the cavity region 7 surrounding the key 6, When trying to open a through-hole in the hollow region 7 from the outside of the front plate 1a , a woven fabric, a knitted fabric, a non-woven fabric or a short fiber made of the cut resistant fiber 8 around the drill penetrating from the front plate 1a into the hollow region 7 As it is wound around and is gradually accumulated around the drill without being cut, the drill stops rotating and cannot be further penetrated. Therefore, thumb-turn picking cannot be performed.
[0016]
In the present invention, the filling amount of the cut resistant fiber to be packed in the cavity region is not particularly limited as long as it prevents the above-described drill penetration operation. Preferably, the filling density is 0.05 to 0. A range of 0.1 g / cm ³ is preferred. When the packing density is 0.05 g / cm ³ or more, the drill penetration operation can be made almost impossible as described above. Further, the packing density may be more than 0.1 g / cm ³ , but even if the amount of the cut resistant fiber is increased further, the effect of preventing penetration of the drill is almost saturated, resulting in a cost disadvantage.
[0017]
【The invention's effect】
As described above, according to the present invention, since an area filled with a woven fabric, a knitted fabric, a nonwoven fabric or a short fiber made of cut resistant fibers is provided around the key, even if an attempt is made to open a through hole with this drill, Since the woven fabric, knitted fabric, non-woven fabric or short fibers made of cut-resistant fibers are wound around the drill and accumulated, the drill stops rotating and cannot be further penetrated. Picking can be disabled.
[Brief description of the drawings]
FIG. 1 is a front view showing a door according to an embodiment of the present invention.
FIG. 2 is a view taken along arrow XX in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door main body 3 Knob 5 Locking claw 6 Key 6a Key hole 6b Rotation knob 7 Cavity area 8 Cut-resistant fiber

Claims (2)

A key that allows the locking claw to go in and out is embedded in the door body, its key hole is exposed on the front side of the door body, and a rotary knob is provided on the back side so as to surround the key inside the door body. An area filled with woven fabric, knitted fabric, non-woven fabric or short fiber made of at least one cut-resistant fiber selected from aramid fiber, wholly aromatic polyester fiber, ultra high molecular weight polyethylene fiber, and polyparaphenylene benzobisoxazole fiber is provided. Security door. The packing density of the cut resistant fiber is 0.05 to 1.0 g / cm ^3. Security door according to claim 1 is.

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