JP2009197466A - Crime-prevention structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crime-prevention structure which disables the tip of a drill having penetrated through a surface member of a structure from invading the interior of the structure, and effectively prevents drill crime. <P>SOLUTION: According to the crime-prevention structure, a zone 2 which is filled with fibers of a short-fiber web or a short-fiber nonwoven fabric, that are easily entangled with the drill, is arranged inside the surface member 1, and a flexible sheet 4 such as a polyester sheet and a relief space 5 for accommodating a free end of the flexible sheet, are arranged on a rear side of the zone. By virtue of the crime-prevention structure, the tip of the drill 7 having penetrated through the fiber filled zone 2 makes contact with the flexible sheet 4, and therefore turning action of the tip is made dull, which disables an outsider from invading a control panel 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a crime prevention structure, and more particularly, to a structure having a locking structure or a control panel inside a surface member such as an entrance door, a safe, a warehouse, a locker, a library, a vending machine, and an ATM. The present invention relates to a crime prevention structure capable of preventing a drill tip penetrating a surface member of a structure from entering the inside of the structure and having a defense function against a crime using a drill.

  In recent years, thumb-turn picking has emerged. 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 use the tip of the wire as a rotation knob of the inner key on the back side of the door. It will be hooked and unlocked.

  As a defense against such a new thumb-turn type picking, Patent Document 1 discloses that a key for operating a locking claw is buried in the door body, its key hole is exposed on the front side of the door body, and a rotary knob on the back side. It has been proposed to provide an area filled with cut-resistant fibers such as aramid fibers so as to surround the key inside the door body.

  In Patent Document 1, a hollow area is formed in the door body so as to surround the periphery of the key, and this hollow area is filled with cut resistant fibers in a fine state. As a cut resistant fiber to be filled, a fiber aggregate in which short fibers are randomly dispersed, a nonwoven fabric in which a randomly dispersed web is entangled with a needle punch, a woven fabric or a knitted fabric is disclosed. Yes.

Recently, however, a drill crime that destroys the door itself has emerged, and its defense is desired.
JP 2004-324145 A

  The present invention is a crime prevention structure using a fiber member, which prevents a drill tip penetrating the surface member of the structure from entering the inside of the structure and can effectively prevent a drill crime. The purpose is to provide a structure.

  The present inventors have intensively studied to solve such problems. And, if we try to prevent the drill's original function, it will be a defense against drill crime, and as a means for that purpose, an area filled with fibers that can be entangled with the drill is provided inside the surface member, and the drill in that area is further provided. The present inventors have found that it is effective to dispose a flexible sheet on the opposite side to the intrusion side so as to escape against the intrusion of the drill tip or the wire, and have reached the present invention.

That is, the present invention is as follows.
(1) An area filled with fibers that can be entangled with the drill is provided inside the surface member, and a flexible sheet and a clearance space for receiving the free end of the flexible sheet are provided on the back side of the area. Crime prevention structure characterized by
(2) The crime prevention structure according to (1), wherein the flexible sheet is a resin sheet, a coated paper, or a laminated board.
(3) The crime prevention structure according to (1) or (2), wherein the form of fibers that can be entangled with the drill is a woven fabric, a knitted fabric, a felt, a short fiber nonwoven fabric, a short fiber sliver, or a short fiber web.
(4) The basis weight of the fiber that can be entangled with the drill is 80 to 400 g / m ² in the case of a woven fabric, knitted fabric, felt, or short fiber nonwoven fabric, and the basis weight is 80 in the case of a short fiber sliver or short fiber web. The security structure according to (3), which is ˜800 g / m ² and has a density of 0.07 or less.
(5) The crime prevention structure according to any one of (1) to (4), wherein the fibers that can be entangled with the drill are heat-resistant and high-strength fibers.
(6) The fiber that can be entangled with the drill is at least one fiber selected from polyphenylene sulfide fiber, wholly aromatic polyester fiber, polybenzobisoxazole fiber, aramid fiber, and polyketone fiber, (1) to The crime prevention structure according to any one of (5).

  The crime prevention structure of the present invention has a surface filled with fibers that can be entangled with the drill inside the surface member, so that the locking structure can be opened illegally or the control panel can be operated illegally. By making the fiber entangled with the drill that penetrates the member, the turning operation of the drill can be blunted. In addition, since a flexible sheet and a clearance space are provided on the rear side of the area, even if the tip of the drill penetrates the fiber filling area, the tip of the drill comes into contact with the flexible sheet. Since it will rip, the rotation operation of a drill will become difficult to function.

  In addition, since the resin sheet, coated paper, and laminated board are flexible and have a smooth surface, the effect of slipping the tip of the drill is great.

  In addition, the fibers that can be entangled with the drill can be prevented by making the fiber easy to break apart and entangle with the drill, such as woven fabric, knitted fabric, felt, short fiber nonwoven fabric, short fiber sliver or short fiber web. Improves.

In the case of a woven fabric, knitted fabric, felt, or short fiber nonwoven fabric, the basis weight is 80 to 400 g / m ² , and in the case of a short fiber sliver or short fiber web, the basis weight is 80 to 800 g / m ² and the density is 0. If it is 0.07 or less, it is possible to ensure the amount of fiber necessary to wind the drill, and to prevent the drill from passing through the fiber layer when the fiber layer becomes hard.

  In addition, by using high heat-resistant and high-strength fibers that can be entangled with the drill, there is no risk of the fibers dissolving due to frictional heat generated by the rotational force of the drill, and the fibers when pulled by the drill There is no risk of running out.

  Therefore, the security structure of the present invention is applied to a structure having a locking structure, a control panel or the like inside a surface member such as an entrance door, a safe, a warehouse, a locker, a library, a vending machine, and an ATM. This makes it impossible for the drill tip or the wire penetrating the surface member of the structure to enter the structure.

  In the crime prevention structure according to the present invention, an area filled with fibers capable of being entangled with a drill is provided on the inner side of the surface member, and a clearance for receiving the flexible sheet and the free end of the flexible sheet is provided on the back side of the area. A space is provided.

  In the present invention, the surface member refers to a surface member of a structure such as an entrance door, a safe, a warehouse, a locker, a library, a vending machine, or an ATM.

  Hereinafter, the present invention will be specifically described with reference to the drawings. FIG. 1 shows an example of a structure provided with a security structure according to the present invention, and FIG. 2 shows a state when a drill enters the security structure shown in FIG.

  The surface member 1 constituting the crime prevention structure is made of metal, resin, or wood, for example, door surface member having a locking structure such as a door, safe, warehouse, locker, library, ATM, vending machine , Vending machines, emergency call devices, elevators, monitoring devices, building equipment (doors, etc.) control devices such as control devices, power supply devices and surface members that cover control devices, coin storage parts of vending machines This corresponds to a surface member covering the surface. Inside the surface member, a zone 2 filled with fibers that can be entangled with the drill is provided. The area 2 can be formed by filling fibers in a hollow area sandwiched between a surface member 1 and a metal, resin or wooden middle plate 3. A flexible sheet 4 is disposed on the back side of the intermediate plate 3, and a clearance space 5 for receiving the free end of the flexible sheet 4 is provided on the back side of the fiber filling area 2. Behind the escape space 5 is a control panel (or locking structure) 6.

  When the drill 7 enters from the surface of the surface member 1, the fiber is wound around the drill when passing through the fiber filling area 2, but the wound fiber is not cut, so that the drill is rotated around the drill as the number of rotations of the drill increases. Fiber accumulates. As a result, the drill stops rotating and cannot be further penetrated. However, since the defense function becomes insufficient when the drill penetrates the fiber filling area 2 and the intermediate plate 3, in the present invention, the flexible sheet 4 and the escape space 5 are provided on the back side of the fiber filling area 2. Yes. When the tip of the drill 7 penetrating the intermediate plate 3 comes into contact with the flexible sheet 4, the free end of the flexible sheet is separated from the intermediate plate 3. The upper end of the flexible sheet 4 is fixed to the intermediate plate 3, but the other end is in a free state in the escape space 5, so that even if the tip of the drill penetrates the fiber filling area, The tip slips on the surface of the flexible sheet 4 and cannot penetrate the flexible sheet 4. Therefore, the flexible sheet 4 can prevent the wire from entering the control panel (or the locking structure) 6 through the drill through hole.

  In order to make the flexible sheet function effectively as described above, fibers are filled so as to be sandwiched between the surface member 1 and the intermediate plate 3, and a flexible sheet is provided on the back side of the intermediate plate 3 to fix the upper end. In addition, it is desirable to provide a clearance space in which the flexible sheet can bend on the back side of the intermediate plate. The size of the escape space is not particularly limited, but considering the size of the structure, the depth 5a is generally about 2 to 5 cm.

  In the present invention, the form of the fiber that can be entangled with the drill is preferably a woven fabric, a knitted fabric, a felt, a short fiber nonwoven fabric, a short fiber sliver, or a short fiber web, and in particular, the winding property to the drill is good. Therefore, a felt, a short fiber web, a short fiber nonwoven fabric and a short fiber sliver in which needle punching is applied to the short fiber web and entangled are preferable. These forms of fibers may be used alone or in combination. In the present invention, the felt refers to a needle punching after laminating a short fiber sliver or a short fiber web on at least one surface of the core material using a reinforcing base material such as a woven fabric, a knitted fabric, or a lattice material as a core material. A structure formed as described above.

Woven, knitted, in the case of using a felt and a short fiber nonwoven fabric, it is preferable to use those having a basis weight of 80 - 400 g / ^{m 2,} more preferably from 100 to 200 g / ^{m 2.} When the basis weight is less than 80 / m ^2, it becomes impossible to secure the amount of fibers necessary to stop the rotation operation by being entangled with the drill, and when the basis weight exceeds 400 g / m ² , the fiber layer becomes hard. This causes the drill to pass through the fiber layer, making it difficult to wind the fiber around the drill. When using a short fiber web and a short fiber sliver that have not undergone the fabric-making process, it is preferable to use one having a basis weight of 80 to 800 g / m ² , more preferably 100 to 800 g / m ² for the same reason. . In various fiber forms that can be entangled with these drills, in any case, the density is preferably 0.07 or less, more preferably 0.05 or less. This is because if the density is too high, it becomes difficult for the fibers to be effectively entangled with the drill.

  The fiber that can be entangled with the drill needs to be flexible enough to be entangled with the drill, but it is also important that the fiber does not break when entangled with the drill. It is preferable that the fiber has high heat resistance and high strength. As heat resistance, a fiber having a melting temperature or a thermal decomposition start temperature of 250 ° C. or higher is preferable, and a fiber of 300 ° C. or higher is more preferable. Further, the strength is preferably a fiber having a tensile strength measured based on JIS L 1013 (1999) of about 13 cN / dtex or more, more preferably a fiber of about 15 cN / dtex or more.

  Examples of highly heat-resistant and high-strength fibers include polyphenylene sulfide (PPS) fibers, wholly aromatic polyester fibers (for example, Kuraray Co., Ltd., trade name “Vectran”), and polyparaphenylene benzobisoxazole fibers (for example, Toyobo Co., Ltd.). Product name "Zylon"), aramid fiber and polyketone fiber. These fibers may be used alone or in combination of two or more. Further, it is desirable to form the fiber layer in a state where these fibers are 100% by weight, but it is not always necessary to be 100% by weight, and if it is at least 50% by weight, preferably 80% by weight or more, polyester fiber Other fibers such as rayon fiber, polyvinyl alcohol fiber, polyamide fiber, and carbon fiber may be mixed.

  Examples of the aramid fibers include meta-aramid fibers and para-aramid fibers. Examples of the meta-aramid fibers include meta-aromatic polyamide fibers such as polymetaphenylene isophthalamide fibers (manufactured by DuPont, trade name “NOMEX”). Para-aramid fibers include, for example, polyparaphenylene terephthalamide fiber (trade name “Kevlar” manufactured by Toray DuPont Co., Ltd.) and copolyparaphenylene-3,4′-diphenyl ether terephthalamide fiber (Teijin Techno Products Co., Ltd.) Para-type wholly aromatic polyamide fibers manufactured by the company and trade name “Technola”).

  Polyketone fibers include polyketone (PK) fibers, polyetherketone (PEK) fibers, polyetherketoneketone (PEKK) fibers, polyetheretherketone (95% by mass or more of repeating units composed of 1-oxotrimethylene ( PEEK) fibers.

  Among these high heat-resistant and high-strength fibers, in addition to excellent cut resistance and heat resistance, para-aramid fibers are preferred in terms of economy and tensile strength, and polyparaphenylene terephthalamide is particularly preferred in terms of flame retardancy. Fiber is preferred.

  The flexible sheet provided on the back side of the fiber filling area is preferably smooth and slippery. For example, a resin sheet such as a polypropylene sheet, a polyester sheet, or a polyamide sheet, a coated paper, a laminated board, or the like is used. Can be mentioned. The thickness of the flexible sheet is not particularly limited as long as it is flexible. Generally, if it is too thin, there is a possibility that the drill may penetrate. However, depending on the material of the sheet, it is preferable to use a sheet having a thickness of about 0.5 mm to 3 mm.

  Next, the present invention will be described more specifically using examples and comparative examples, but the present invention is not limited to the following examples.

(Production Example 1)
Polyparaphenylene terephthalamide fiber filament yarn ("KEVLAR (registered trademark) 29") manufactured by Toray DuPont Co., Ltd., tensile strength 20.3 cN / dtex, tensile elastic modulus 490 cN / dtex, single yarn fineness 1.65 dtex Cut staples (fiber length 51 mm) were spun and opened by known methods to produce short fiber webs, and the short fiber webs having a basis weight, thickness and density shown in Table 1 were obtained.

(Production Example 2)
After a plurality of the short fiber webs of Production Example 1 were laminated, needle punching was performed to produce short fiber nonwoven fabrics having a basis weight, thickness and density shown in Table 1.

(Production Examples 3 to 6)
The same poly as used in Production Example 1 on both sides of a plain weave base fabric produced using nylon monofilament (warp: nylon monofilament 220d × 4 twisted yarn 50 / 5cm, weft: nylon monofilament 500d 50 / 5cm) A short fiber web composed of cut staples (fiber length 51 mm) of paraphenylene terephthalamide fiber was integrated by needle punching by a known method. At this time, felts having different weight per unit area, thickness and density shown in Table 1 were prepared by performing needle punching while adjusting the degree of entanglement between the short fiber web and the base fabric.

  The non-woven fabric and felt produced in Production Examples 3 to 6 are sandwiched between two wooden boards (MDF board, medium fiber board) with a thickness of 9 mm set to a board gap of 10 mm, and the back side of the wooden board on the back side Further, a polyester sheet having a thickness of 1.0 mm was installed as a flexible sheet with only the upper end portion fixed. In addition, cardboard was placed about 3.0 cm behind the rear wooden board.

Example 1
Using a battery driver drill equipped with a drill blade (PSR14.4 manufactured by BOSCH), the tip of the drill blade is pressed from the surface of the short fiber nonwoven fabric produced in Production Examples 1 to 6 or the wooden board sandwiching the felt to rotate at high speed. An experiment was conducted to determine whether the tip of the drill blade reached the cardboard under the conditions (maximum no-load rotation speed 1400 rotations / min) and torque 30 N · m, and the following evaluation criteria were used. The drill blade used was 3 mm in outer diameter, 65 mm in length, cobalt high-speed steel, and used for stainless steel, steel, and aluminum.

(Evaluation criteria)
(Double-circle): Since the drill tip did not penetrate the wooden board by the drill rotation, it did not reach the cardboard.
○: The drill tip penetrated the wooden board by rotating the drill, but did not reach the cardboard.
X: The drill tip reached the cardboard.

(Comparative Example 1)
An experiment was conducted in the same manner as in Example 1 except that the flexible sheet was not installed, using the felt produced in Production Example 3.

  The above experimental results are summarized in Table 1.

As is clear from the results in the table, when using a non-woven fabric (Production Example 2) or felt (Production Example 4) having a density of the fiber filling area of 0.03 to 0.05, the drill tip penetrates the wooden board. It turns out that there is an effect which suppresses doing. Further, when a short fiber web (Production Example 1) having a density of the fiber filling area of 0.01 was used, it was difficult to secure the amount of fiber necessary to stop the rotation operation by being entangled with the drill. It became easier to penetrate the wooden board.
Furthermore, even if the felt is made by putting a base fabric, the felt (Production Examples 3, 5, and 6) in which the density of the felt is increased due to the entanglement between the base fabric and the short fiber web, The entanglement decreased and it became easier to penetrate the wooden board. The felt (Manufacturing Example 4) produced by suppressing the density as much as possible in the process of putting the base fabric into the short fiber web and making it felt did not penetrate the wooden board.

  In the example of the present invention, regardless of the characteristics of the felt, the flexible sheet and the relief space are provided on the rear side of the wooden board. Therefore, even if the drill tip penetrates the fiber filling area, the drill tip is flexible. The effect of preventing penetration was manifested by the fact that the drilling operation became difficult to function due to contact with the adhesive sheet and sliding.

  On the other hand, in the comparative example, since the flexible sheet and the escape space are not provided on the rear side of the wooden board, the drill tip penetrating the wooden board reached the cardboard.

  The crime prevention structure according to the present invention is widely used in structures having a defense function by opening and closing a lock, such as an entrance door, safe, warehouse, locker, library, vending machine, and ATM, or a structure storing a control panel. Can be applied.

It is sectional drawing which shows an example of the crime prevention structure of this invention. It is a figure explaining a state when a drill penetrate | invades into the crime prevention structure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface member 2 Fiber filling area 3 Middle plate 4 Flexible sheet 5 Escape space 5a Escape space depth 6 Control panel 7 Drill

Claims (6)

  An area filled with fibers that can be entangled with the drill is provided inside the surface member, and a flexible sheet and a clearance space for receiving the free end of the flexible sheet are provided on the back side of the area. Crime prevention structure.   The crime prevention structure according to claim 1, wherein the flexible sheet is a resin sheet, a coated paper, or a laminated board.   The crime prevention structure according to claim 1 or 2, wherein the form of fibers that can be entangled with the drill is a woven fabric, a knitted fabric, a felt, a short fiber nonwoven fabric, a short fiber sliver, or a short fiber web. When the form of the fiber that can be entangled with the drill is a woven fabric, a knitted fabric, a felt, or a short fiber nonwoven fabric, the basis weight is 80 to 400 g / m ² , and when the fiber is a short fiber sliver or short fiber web, the basis weight is 80 to 800 g / m ^2. The crime prevention structure according to claim 3, which is m ² and has a density of 0.07 or less.   The crime prevention structure according to any one of claims 1 to 4, wherein the fiber that can be entangled with the drill is a heat-resistant and high-strength fiber.   The fiber capable of being entangled with the drill is at least one fiber selected from polyphenylene sulfide fiber, wholly aromatic polyester fiber, polybenzobisoxazole fiber, aramid fiber, and polyketone fiber. Crime prevention structure described in Crab.