JP2004353349A - Lock box for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock box for a door, which makes it difficult for the edge of a cutting tool to bite into a hard protective part, that is, makes the edge slip over the protective part, even if the cutting tool edge breaks a first plate and reaches the protective part, so that the lock box exerts a great effect in crime prevention. <P>SOLUTION: According to the lock box, a housing is formed on a protective plate, and a plurality of rows of hard protective parts each having circular section, which make the edge of the cutting tool slip, are put in the housing, to prevent the return of a dead bolt. The protective plate is anchored on a wide side wall, on which a cylinder of the lock box is fitted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door lock box, and more particularly to a door lock box effective when a thief breaks the lock box using a cutting tool such as a carbide drill or a carbide hole saw.
[0002]
[Prior art]
JP-A-2003-120083 is described as a conventional example. The lock structure described in this publication uses a plier having a pinched portion by a thief, and prevents the fixed cylinder and the cylinder lock from being forcibly "peeled off" together with the decorative ring.
[0003]
However, in recent years, the methods of thieves have deteriorated, and cutting tools such as carbide drills and carbide hole saws have been used to cover the peripheral portion of the outer cylinder body, the required portions of the door, and the locking / unlocking mechanism of the lock box. The "cam feed" incident in which an appropriate hole is made by making an attack on the wide side wall, etc., and seven tools are operated using the holes to rotate the drive arm of the dead cam (commonly called Dharma) in the unlocking direction. Has occurred.
[0004]
Therefore, in the case of such a “cam-feed” case, it is not always sufficient to take measures only to remove the cylinder, and it is necessary to take measures to protect the lock from another viewpoint.
[0005]
[Problems to be solved by the invention]
A first object of the present invention is to provide a lock box capable of protecting a thief from attacking a lock by making a hole in an outer wall surface of a door using a carbide drill or a carbide hole saw. As a result, "cam feed" can be prevented. A second object is that an existing lock box can be used as it is.
[0006]
[Means for Solving the Problems]
In the door lock box of the present invention, in order to prevent the return of the deadbolt, a storage portion is formed in the defense plate, and a plurality of hard protection components having a circular cross section in which the cutting tool edge slides are arranged in the storage portion. It is characterized in that the protective plate is filled and fixed to at least the wide side wall of the lock box on the side where the cylinder is mounted.
[0007]
Further, in the door lock box of the present invention, in order to prevent the dead bolt from returning, the protection plate is fixed to the wide side wall on the side where the cylinder of the lock box is mounted, and the protection plate is an outer first plate. And a second plate fixed to the wide side wall on which the cylinder is mounted, and a third plate interposed between the first plate and the second plate, wherein at least dead bolts of the third plate are formed. A storage part is formed in a part of a required range as a reference, and the storage part is filled with a plurality of hard protective parts having a circular cross-section in which the cutting edge of a cutting tool slides, in parallel.
[0008]
Further, in order to prevent the dead bolt from returning, the door lock box of the present invention has a storage portion formed on at least one of the opposite side walls of the U-shaped defense plate, and the cutting edge of the cutting tool is formed in the storage portion. A plurality of hard protective parts having a circular cross section are filled in parallel, and the protective plate is locked so that one side wall having the hard protective parts is attached to a wide side wall on which a cylinder of a lock box is mounted. It is characterized by being fixedly fitted in a box.
[0009]
Further, in the lock box for a door of the present invention, in order to prevent the dead bolt from being returned, a storage portion is formed on the protection plate having a two-piece structure, and a hard protection having a circular cross section in which the cutting tool edge slides in the storage portion. A plurality of parts are filled in parallel, and the protection plate is fixed to a wide side wall on which a cylinder of a lock box is mounted.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
First, an embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 denotes a lock box. The lock box 1 includes a case body 2 and a case lid 3 connected to the case body via fixing means. The case body 2 has a vertically long mounting plate 4, a relatively short interposed plate 5 fixed to the inner wall surface of the mounting plate 4, and a front 6 fixed to the outer wall surface of the mounting plate 4. Fixtures for securing the front 6, the intervening plate 5, and the mounting plate 4 and the locking mechanism of the lock are omitted because they are not directly related to the present invention.
[0011]
Reference numeral 7 denotes a deadbolt which is laterally provided in the lock box 1 so as to be able to enter and exit from the mounting plate 4 and the front 6. The deadbolt 7 is guided by a window 8, a guide shaft 9, and the like. The dead bolt 7 has a front end portion that engages with a strike (not shown), an intermediate portion having a horizontally long hole that engages with the guide shaft 9, a rear end portion that engages with a dead cam (commonly referred to as daruma) 10, and the like.
[0012]
Reference numeral 11 denotes a plurality of female screw posts fixedly provided on the case body 2, and a plurality of fixing tools are screwed to these female screw posts 11, respectively.
Numeral 12 denotes receiving seats fixed to the inner wall surfaces of the case body 2 and the case lid 3 (the receiving seats on the side of the case body 2 are not shown). A fitting portion having a hole is formed so as to protrude.
[0013]
Thus, the above-described tubular engaging portion of the dead cam 10 is rotatably fitted into the fitting hole of the receiving seat 21 (including the receiving seat of the case body). The dead cam 10 has a drive arm 13 extending in a radial direction from the cylindrical engagement portion, and the drive arm 13 is engaged with the rear end of the dead bolt 7 described above. The dead cam 7 is rotated by a driving force of a cylinder or a thumb turn operated by operating a duplicate key. As a result, the dead bolt 7 appears and disappears.
[0014]
Here, the cylinder fitting hole 15 formed in the wide side wall of the case body 2 will be described with reference to FIG. Generally, a fitting hole 15 for a cylinder and a fitting hole (not shown) for a thumb turn are respectively formed at the corners of the wide side wall 14 of the case body 2 and the case lid 3 of the lock box 1. These fitting holes are formed in a contour shape of “lantern” in appearance, and the outer cylinder end of the cylinder 16 is mounted in the fitting hole 15 on the case body 2 side.
[0015]
By the way, when the duplicate key is operated on the cylinder 16, the drive arm 13 of the dead cam 10 rotates in the direction of the arrow (clockwise) in FIG. 1, so that the dead bolt 7 protrudes in the direction of the arrow (locking direction).
Therefore, when there is no duplicate key, a thief uses a cutting tool (not shown) to make an attack on a required portion of the door and the wide side wall 14 of the lock box 1 to make a hole, and to operate a seven tool (a wire or the like). Then, there is a possibility that the driving arm 13 is rotated in a direction opposite to the arrow (counterclockwise).
[0016]
Therefore, in the present invention, in order to prevent the dead bolt 7 from returning (moving in the unlocking direction), a storage portion 22 is formed in the protection plate 21 as shown in FIG. A plurality of hard protective parts 23 having a circular cross section with a slippery cutting edge were filled in parallel, and the protective plate 21 was fixed to the wide side wall 14 of the lock box 1 on the side where the cylinder is mounted.
[0017]
Next, a specific configuration of the defense plate 21 will be described. FIG. 2 is an exploded view of the defense plate 21 of the present invention. 3 and 4 show the internal structure of the protection plate 21 in relation to the lock box 1. FIG.
[0018]
The protection plate 21 of the first embodiment is composed of four components as is apparent from these figures. In other words, the protection plate 21 includes a first plate 25 on the near side in FIG. 2, a second plate 26 on the other side, and an intermediate third plate interposed between the first plate 25 and the second plate 26. The storage portion 22 having an arbitrary shape such as a square shape or a round shape is formed at least in a portion of the third plate 27 within a required range based on the dead bolt 7.
[0019]
In the present embodiment, the storage portion 22 has a stepped portion near a plate fitting hole (for convenience, referred to as a “third fitting hole 29”) corresponding to the cylinder fitting hole 15 of the lock box 1. A large number of rod-like bodies 23 formed by quenching carbon steel, for example, are stored in the rectangular opening 22 in a parallel state. That is, the large number of rods 23 correspond to an example of the “hard defense component” of the present invention.
[0020]
As shown in FIG. 2, the large number of rods 23 are long and short pin-like rods 23. The length of the rod 23 varies from short to long corresponding to the width of the rectangular opening 22. The cross-sectional shape of each rod 23 is circular (true circle) as shown in FIG.
[0021]
The diameter of each rod 23 is larger than the thickness of the first plate 25 and / or the second plate 26 corresponding to the thickness of the third plate 27. In the present embodiment, since the thickness of the third plate 27 is “twice” or “three times” the thickness of the first plate 25 or the second plate 26, the diameter of the rod 23 is equal to the first plate 25 or the second plate 26. This is “two times” or “three times” the thickness of the second plate 26.
[0022]
By the way, the cutting edge of a cutting tool such as a carbide drill or a carbide hole saw used by a thief is a cemented carbide made by mixing, compounding, and press forming each of the powders of tungsten W and carbon C at a certain ratio. Therefore, the "hard defense component 23" of the present invention employs a cemented carbide pin as a cemented carbide.
[0023]
Further, a first fitting hole 30 and a second fitting hole 31 corresponding to the third fitting hole 29 described above are also formed at the corners of the first plate 25 and the second plate 26, respectively. Further, a plurality of small through holes 33 for fixing means (caulking, fixing tools) are formed at appropriate positions of the first to third plates 25.26.27 at predetermined intervals.
[0024]
The defense plate 21 will be further described. As shown in FIG. 3, a third plate 27 having an opening 22 as a storage portion is sandwiched between a first plate 25 visible from the outside and a second plate 26 directly fixed to the wide side wall 14 of the case body. Have been.
[0025]
The hard protection component 23 accommodated in the opening 22 is a rod-shaped body formed by quenching carbon steel or a cemented carbide pin as a cemented carbide. The plate 25 is formed by quenching carbon steel, although the protection against cutting tools such as a carbide drill and a carbide hole saw is not sufficient, including the thickness relationship.
[0026]
The protection plate 21 is fixed to the wide side wall 14 on which the cylinder 16 of the lock box 1 is mounted in order to prevent at least return of the dead bolt (cam feed).
[0027]
【Example】
In the defense plate 21 of the first embodiment, the storage portion (opening) 22 of the third plate 27 sandwiched in a sandwich shape may be either square or round. The storage portion (opening) 22 is filled with a hard protection component 23 so as not to form a gap. The hard defense component 23 is arranged in a horizontal state, but may be arranged in a vertical state or an inclined state. Further, the hard protection component 23 is a long rod, but may be a short rod or a sphere such as a pachinko ball.
[0028]
Next, in this section, the second embodiment shown in FIGS. 6 and 7 and the third embodiment shown in FIGS. 8 and 9 will be described. In addition, since each of these embodiments has the same technical idea as the lock box 1 of the first embodiment, the same portions are denoted by the same or similar reference numerals, and duplicate description will be omitted.
[0029]
The second embodiment shown in FIGS. 6 and 7 mainly differs from the first embodiment in that the opposing side walls 40... Of the U-shaped protection plate 21A are used to prevent the dead bolt from returning. A storage part 28A is formed on at least one side wall 40 of 41, and the storage part 28A is filled with a plurality of hard protection parts 23 having a circular cross section in which the cutting tool's cutting edge slides in a parallel state. That is, one side wall 40 having the component 23 is fixedly fitted to the lock box 1 so as to be attached to the wide side wall 14 of the lock box 1 on the side where the cylinder 16 is mounted.
[0030]
In the second embodiment, as shown in FIG. 7, one side wall 40 attached to the wide side wall 14 of the lock box 1 on which the cylinder 16 is mounted in a fit state, and the lock box 1 on which the thumb tern 17 is mounted, as shown in FIG. The storage portions 28 </ b> A. Are provided on both the other side walls 41 attached to the wide side wall 18 in a fit state. 28A, respectively, and these storage portions 28A. 28A is filled with a plurality of rods as an example of a hard defense component 23 without gaps and in parallel. Reference numeral 19 denotes an upper wall of the lock box 1, and reference numeral 42 denotes a central wall of the defense plate 21A which is surface-bonded to the upper wall.
[0031]
With reference to FIG. 7, the central wall 42 of the defense plate 21A corresponds to the upper wall, but the defense plate 21A having an end surface or a U-shaped cross section is provided at the bottom wall (lower side) or the rear wall (side) of the lock box 1. The upper wall 42 of the U-shaped protection plate 21A in such a case corresponds to a lower wall or a rear wall. Even with such a configuration, the same object as in the first embodiment can be achieved.
[0032]
The third embodiment shown in FIGS. 8 and 9 is mainly different from the first embodiment in that the protection plate 21 of the first embodiment has a three-layer structure of first to third plates. However, this is partially changed in design to provide a protection plate 21B having a two-piece structure.
[0033]
That is, the defense plate 21B has a first plate 25B and a second plate 25B having a thickness (for example, three times the thickness) of the first plate 25B and having a laterally recessed storage portion 28B at a required position. The storage part 28B is filled with a plurality of hard protection parts 23 each having a circular cross section in which the cutting tool slides in the storage part 28B in a parallel state, and the protection plate 21B is placed at least on the side where the cylinder of the lock box 1 is mounted. It is fixed to the wide side wall 14.
[0034]
The storage portion 28B is formed at a portion within a required range based on the dead bolt, but may be formed entirely on the second plate 26B. Even with such a configuration, the same object as in the first embodiment can be achieved.
In addition, regarding the respective plates of the defense plate of the present invention, those having a three-layer structure and a two-layer structure are shown. However, it is needless to say that one plate is appropriately bent, and a hard defense component is stored on one opposing side wall. Even if a space portion is formed, it is within the uniform range.
[0035]
Further, the first to third fitting holes 30.31.29 are formed in the protection plate, respectively, and these holes are appropriately changed in design of the shape of the protection plate (for example, the fitting holes are formed in an arc shape). Is not an essential part of the present invention. Also. The small through-hole 33 is not necessary depending on the fixing means (for example, welding).
[0036]
【The invention's effect】
As is apparent from the above description, in the present invention, in order to prevent the return of the deadbolt, a storage portion is formed in the defense plate, and a hard protection having a circular cross section in which the cutting tool edge slides in the storage portion. Since a plurality of parts are filled in parallel and the protection plate is fixed to the wide side wall on the side where the cylinder of the lock box is mounted, the security effect is enormous.
[0037]
That is, in the protection plate of the lock box according to the present invention, a storage portion is formed in a required range portion based on the deadbolt, and a plurality of hard protection components having a circular cross section on which the cutting tool edge slides are arranged in the storage portion. The thief cuts a hole in the door with a cutting tool and attempts to operate the dead cam for applying and unlocking with an unlocking tool (wire, etc.) from the hole, but it becomes a hard defense part of the defense plate. Therefore, it is extremely difficult to achieve "cam feed".
[0038]
To extend this fact, the cross-sectional shape of the hard protection component is formed in a circular shape in which the cutting edge of the cutting tool slides, and a plurality of hard protection components are provided in a side-by-side state in the storage portion of the plate. Even if the first plate is destroyed and reaches a hard defense part, the cutting edge of the cutting tool becomes difficult to bite (so-called escape of the cutting edge). Is overwhelming. In the present invention, an existing lock box can be used as it is.
[Brief description of the drawings]
1 to 5 show a first embodiment of the present invention. 6 and 7 show a second embodiment of the present invention. 8 and 9 show a third embodiment of the present invention.
FIG. 1 is a schematic explanatory view showing an embodiment of the present invention.
FIG. 2 is an exploded view for explaining a protection plate.
FIG. 3 is an explanatory diagram showing a relationship between a wide side wall of the lock box and a protection plate.
FIG. 4 is an explanatory diagram showing a relationship between a lock box and a protection plate.
FIG. 5 is a schematic explanatory view showing an embodiment of the present invention (an explanatory view showing a relationship with a cylinder from the rear wall side of the lock box, not shown in the Samtern group).
FIG. 6 is a schematic explanatory view of a longitudinal section showing a second embodiment of the present invention.
FIG. 7 is a schematic explanatory view showing an embodiment of the second example.
FIG. 8 is an explanatory view similar to FIG. 3 of a third embodiment of the present invention.
FIG. 9 is an explanatory view similar to FIG. 4 of a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... lock box, 2 ... case body, 3 ... case lid, 7 ... deadbolt, 13 ... drive arm, 14 ... wide side wall, 15 ... cylinder fitting hole, 16 ... cylinder, 17 ... thumb turn, 18 ... other side wall , 19 ... upper wall of the lock box, 21.21A. 21B ... Defense plate, 22.28A. 28B: storage section, 23: hard protective component, 25.25B: first plate, 26.26B: second plate, 27: third plate, 29: third fitting hole, 30: first fitting hole, 31 ... Second fitting hole, 40.41.

Claims (9)

In order to prevent the return of the deadbolt, a storage portion is formed in the defense plate, and a plurality of hard protection components having a circular cross section in which the cutting edge of the cutting tool slides are filled in parallel in the storage portion, and the protection plate is at least A lock box for a door, wherein the lock box is fixed to a wide side wall on a side where a cylinder of the lock box is mounted. 2. The lock box for a door according to claim 1, wherein the hard protection component is a carbide pin as a cemented carbide. 2. The door lock box according to claim 1, wherein the hard protection component is a rod-shaped body formed by quenching carbon steel. In order to prevent the dead bolt from returning, a protection plate is fixed to the wide side wall of the lock box on which the cylinder is mounted, and the protection plate comprises an outer first plate and a wide side wall on the side where the cylinder is mounted. And a third plate interposed between the first plate and the second plate, and a storage part is provided at least in a portion of the third plate within a required range based on dead bolts. A lock box for a door, wherein said storage portion is filled with a plurality of hard protective parts having a circular cross section in which a cutting tool's cutting edge slides, in a parallel state. In claim 4, the third plate is sandwiched between the first plate and the second plate in a sandwich manner, and the storage portion of the third plate is an opening, and the hard protection component in the opening is a super-hard part. A lock box for a door, which is a rod-shaped body formed by quenching a carbide pin or carbon steel as a hard alloy. 5. The door lock box according to claim 4, wherein at least the outer first plate is formed by quenching carbon steel. In order to prevent the return of the deadbolt, a storage portion is formed on at least one of the opposed side walls of the U-shaped defense plate, and a plurality of hard protection components having a circular cross section on which the cutting edge of the cutting tool slides are formed in the storage portion. The protection plate is filled in a side-by-side state, and the protection plate is fixedly fitted to the lock box such that one side wall having the hard protection part is attached to the wide side wall on which the cylinder of the lock box is mounted. And door lock box. In order to prevent the return of the deadbolt, a storage portion is formed in a defense plate having a two-piece structure, and a plurality of hard protection components having a circular cross section in which the cutting tool's cutting edge slides are filled in the storage portion in parallel. A lock box for a door, wherein the defense plate is fixed to a wide side wall on which a cylinder of the lock box is mounted. 9. The protection plate according to claim 8, wherein the protection plate comprises a first plate and a second plate which is thicker than the first plate and has a laterally recessed storage portion at a required position. And door lock box.

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