JP4051002B2 - Cylinder demolition protection structure of lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylinder tear-off preventing structure for a lock.
[0002]
[Prior art]
JP-A-2003-120083 is described as a conventional example. The lock structure described in this publication uses a pliers in which a thief has a pinching portion, and forcibly “stripping” the fixed cylinder and the cylinder lock together with the decorative ring.
[0003]
However, in recent years, the thief's technique has deteriorated, and a cutting tool such as a cemented carbide drill or cemented carbide hole saw is used to make a hole in the outer wall surface of the door on the peripheral ring of the outer ring or the cylinder. There are cases where the peripheral edge of the fitting hole for mounting is destroyed and the cylinder lock (hereinafter referred to as “cylinder”) itself is “stripped”. In such a case, it is not always perfect to take measures against the protective structure of the cylinder alone, and it is necessary to take measures to remove the cylinder from the lock from another point of view.
[0004]
[Problems to be solved by the invention]
A first object of the present invention is to provide a lock-off mechanism for a cylinder torn off a lock that can be protected even when a thief attacks the lock by making a hole in the outer wall surface of the door using a carbide drill or a carbide hole saw. That is. As a result, “cylinder demolition” can be prevented. The second object is that the existing lock box can be used as it is without improving the case body and the case lid receiving seat and mounting plate constituting the lock box. The third purpose is to make effective use of the internal space of the lock box and not to obstruct (do not interfere with) the operation of the dead cam. The fourth purpose is to firmly combine the cylinder and the defense block with the lock box.
[0005]
[Means for Solving the Problems]
In the cylinder demolition protection structure of the lock according to the present invention, the outer cylinder end 30 of the cylinder 29 is inserted into the cylinder fitting hole 28 formed in the wide side wall of the lock box 1, while the outer cylinder is inserted into the inner space of the lock box. A defense block 35 having a plurality of horizontal guide holes 50 communicating with the horizontal through holes 31 and 31 of the pair of upper and lower projections 32 and 32 of the end portion 30 is incorporated, and the defense block 35 is connected to the receiving seat 21 on the cylinder side. A receiving hole 45 that fits into the fitting part 23 and a notch portion 46, 48 for communicating with the receiving hole 45, and the defense block 35 and the cylinder 29 are attached to a mounting plate for a lock box. The four upper and lower through holes 7 and 8 are integrally connected in a skewered manner through a plurality of elongated defense rods 36 inserted into the lock box.
[0006]
In the above configuration, the defense block 35 communicates with the receiving hole 45 so as not to interfere with the receiving hole 45 and the dead cam 25 that are fitted to the peripheral wall of the fitting portion 23 that is formed to protrude from the receiving seat 21 of the case body. It has the notch parts 46 and 48 which do. Further, the defense block 35 is characterized in that it is fixed in the lock box via a support column 17 and a mounting hole 47 fixedly provided in the lock box.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
First, an environment for carrying out the 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 coupled to the case body through fixing means. The case body 2 has a vertically long mounting plate 4, a relatively short interposition 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. The fasteners for fixing the front 6, the intervening plate 5, and the mounting plate 4 and the locking mechanism of the lock are omitted since they are not directly related to the present invention.
[0008]
Reference numerals 7 and 8 are a total of four through-holes formed in the mounting plate 4 and the interposition plate 5, respectively. These through-holes 7 and 8 will be described later when a cylinder or thumb turn is mounted on site. Four elongated defense rods are inserted respectively.
[0009]
Reference numeral 9 denotes a dead bolt installed in the lock box 1 so as to be able to enter and exit from the mounting plate 4 and the front 6. The dead bolt 9 is guided by the window portion 10, the guide shaft 11, and the like. The dead bolt 9 includes a front end portion 12 that engages with a strike (not shown), an intermediate portion 14 that has a horizontal long hole 13 that engages with the guide shaft 11, a rear end portion 15 that engages with a dead cam, and the like. At the center of the upper wall of the portion 14, a fin-like engagement projecting piece 16 is provided in the direction of protrusion and depression.
[0010]
Reference numeral 17 denotes a plurality of female screw columns fixedly provided on the case body 2, and a plurality of fixing tools 18 are screwed onto the female screw columns 17, respectively.
A receiving seat 21 is caulked and fixed to the inner wall surface of the case body 2, and a fitting portion 23 having a circular fitting hole 22 is formed at the center of the receiving seat 21. In addition, the receiving surface which has a fitting part similarly to the case body 2 is provided also in the inner wall surface of the case lid 3 (drawing omitted).
[0011]
Thus, the cylindrical engagement portion 26 of the dead cam 25 shown in FIG. 10 is rotatably fitted in the fitting hole 22 of the receiving seat 21 (including the receiving seat of the case lid 3). The dead cam 25 has a drive arm 27 extending in the radial direction from the cylindrical engagement portion 26, and the drive arm 27 is engaged with the rear end portion 15 of the dead bolt 9 described above. The dead cam 25 is rotated by a driving force of a cylinder or thumb turn that is operated by operating a key combination. As a result, the dead bolt 9 appears and disappears.
[0012]
Here, the cylinder fitting hole formed in the wide side wall of the case body 3 will be described with reference to FIGS. In general, a cylinder fitting hole 28 and a thumb turn fitting hole (not shown) are respectively formed in the corners of the wide side walls of the case body 2 and the case lid 3 of the lock box 1. These fitting holes are externally formed in a “lantern” contour shape, and the outer cylinder end 30 of the cylinder 29 is inserted into the fitting hole 28 on the case body 2 side.
[0013]
By the way, on the upper and lower portions of the outer peripheral wall of the outer cylinder end 30 of the cylinder 29, protrusions 32 and 32 having horizontal through holes 31 and 31 through which the plurality of elongate defense rods 36 are respectively formed are formed. Yes. When the outer cylinder end 30 of the cylinder 29 is inserted or inserted into the fitting hole 28 on the case body 2 side, a pair of upper and lower protrusions 32 and 32 are formed on the peripheral wall of the fitting portion 23 of the receiving seat 21. It protrudes from the upper and lower arc-shaped notches 33, 33.
[0014]
Next, the main part of the present invention will be described with reference to FIGS. FIG. 3 is a perspective view of the defense block 35. As shown in FIG. 10, the defense block 35 is disposed between the receiving seat 21 of the case body 2 and the receiving seat of the case lid 3 (internal space), and is fitted into at least the fitting hole 28 of the lock box 1. The cylinder 29 is integrally connected to a pair of upper and lower protrusions 32, 32 on the outer cylinder end 30 via a plurality of (eg, two to four) elongated defense rods 36.
[0015]
The structure of the gate-shaped defense block 35 will be described with reference to FIG. Reference numeral 37 denotes a vertical side wall on the case lid 3 side, and the vertical side wall 37 is regulated by the inner wall surface of the case lid 3. Reference numeral 38 denotes a vertical side wall on the case body side, and the vertical side wall 38 is regulated on the inner wall surface of the case body 2 (directly regulated in a surface contact state with the receiving seat 21). Reference numeral 39 denotes a front wall on the front side, and the front wall 39 is regulated by a guide plate described later. Reference numeral 40 denotes a rear wall regulated by the inner wall surface of the rear wall of the lock box 1. Reference numeral 41 denotes an upper wall regulated by the inner wall surface of the upper wall of the lock box. Reference numeral 42 denotes a bottom wall on the rear end side of the dead bolt 9.
[0016]
Accordingly, a relatively large receiving hole 45 is formed in the central portion of the vertical side walls 37 and 38, and this receiving hole 45 communicates with a central notch 46 formed in the central portion of the lower end portion (bottom wall portion). ing. When the receiving hole 45 is incorporated in the receiving seat 21 via mounting holes 47 and 47 formed in the left and right portions of the upper end portion (upper wall portion) of the defense block 35 and the female thread support 17 on the case body 2 side, respectively. Is fitted to the peripheral wall of the fitting portion 23 of the receiving seat 21 with a margin. In this case, the receiving hole 45 is fitted to the peripheral wall of the fitting portion of the receiving seat (not shown) of the case lid 3 with a margin.
[0017]
Here, another notch will be described with reference to FIG. A bottom wall notch 48 that communicates with the center notch 46 from the front wall 39 to the rear wall 40 is formed in the bottom wall 42 of one gate-shaped defense block 35. The bottom wall cutout 48 and the central cutout 46 are provided so as not to interfere with a dead cam (commonly called “Dharma”) or the like. Therefore, the design of the shapes of the bottom wall notch 48 and the center notch 46 can be arbitrarily changed.
[0018]
The horizontal guide hole 50 for a defense rod will be described with reference to FIGS. As described above, when the cylinder 29 or the thumb turn (not shown) is mounted on the lock box 1, for example, a total of four elongated defense rods 36 are connected to the defense block 35 and the through-holes 7 and 8 on the mounting plate 4. The cylinder 29 is inserted into a pair of upper and lower projections 32, 32 of the outer cylinder end 30.
[0019]
Therefore, a total of eight horizontal guide holes 50 for the defense rods are formed on the upper and lower ends of the defense block 35 on the lines of the upper and lower through holes 7 and 8 of the mounting plate 4 or at positions corresponding thereto. Yes. Next, supplementary explanation will be given regarding the eight horizontal guide holes 50. 4 and 7, the four horizontal guide holes 50 formed on the front wall 39 side of the defense block 35 are in a horizontal state, but the four horizontal guide holes formed on the rear wall 40 side. The hole 50 has a slightly gentle curvature (slightly arc shape) so that the elongated defense rod 36 does not easily come off.
[0020]
As shown in FIG. 7, the horizontal through holes 31, 31 of the upper and lower pair of protrusions 32, 32 of the outer cylinder end 30 of the cylinder 29, and the upper and lower sides of one side (case body side) of the defense block 35 Since the horizontal guide holes 50 communicate with each other on the horizontal line, the two elongate defense rods 36 are connected to the upper and lower horizontal guide holes 50 on one side (case body side) of the defense block 35 from the upper and lower through holes 7 and 8 of the mounting plate 4. In addition, it is necessary to pierce the horizontal through holes 31 and 31 at the outer cylinder end 30 of the cylinder 29 in a so-called skewered manner. When the two elongate defense rods 36 are inserted like a skewer, the defense block 35 and the cylinder 29 are integrally coupled.
[0021]
Therefore, although not specifically shown, the thumb turn also applies the remaining two elongated defense rods 36 to the upper and lower horizontal guides on the other side (case lid side) of the defense block 35 from the upper and lower through holes 7 and 8 on the other side of the mounting plate 4. The defense block 35 and the thumb turn are integrally joined by piercing the holes 50 and 50 and the horizontal through hole at the end of the outer cylinder of the thumb turn in a so-called skewer shape.
[0022]
As shown in FIG. 10, in this embodiment, a guide plate 55 that engages with the engagement projection piece 16 of the dead bolt 9 is fixedly disposed in the case body 3, and the two upper and lower parts described above are provided. The elongated defense rods 36, 36 also penetrate through small through holes formed above and below the guide plate 55. Therefore, the defense block 35 and the cylinder 29 are further combined with the lock box 1.
[0023]
【Example】
The defense block 35 is formed in a gate shape so as to be regulated by the inner wall surface of the lock box 1, but is not limited to this form. The design can be arbitrarily changed as long as it does not obstruct the operation pieces constituting the dharma and the locking / unlocking mechanism (for example, a slightly thick plate). Moreover, although the defense block 35 is formed in one block body from a viewpoint of simplification of incorporation, as long as the object and action of the invention are the same, it may be formed in a two-part block body. Further, the protective block 35 may be formed into a thick plate shape or block shape by quenching carbon steel so that it can withstand a cutting tool such as a carbide drill or a carbide hole saw.
[0024]
【The invention's effect】
As is clear from the above description, the present invention has the following effects.
(1) It is possible to provide a lock-off structure for protecting the cylinder from the lock that can be protected even when a thief attacks the lock by making a hole in the outer wall surface of the door using a carbide drill or a carbide hole saw. As a result, “cylinder demolition” can be prevented.
(2) The existing lock box can be used as it is without improving the case seat and the case lid receiving seat and the mounting plate constituting the lock box.
(3) The invention according to claim 2 makes effective use of the internal space of the lock box and does not obstruct (do not interfere with) the operation of the dead cam.
(4) The cylinder and the defense block can be firmly combined with the lock box.
(5) In the case of the embodiment in which the defense block is formed in a single gate shape, the incorporation can be simplified.
[Brief description of the drawings]
1 to 10 are explanatory views showing one embodiment of the present invention.
FIG. 1 is a schematic explanatory view showing an example of an implementation environment (lock box) to which the main part of the present invention is applicable.
FIG. 2 is a schematic explanatory view showing a place to be arranged in a lock box.
FIG. 3 is a perspective view of a main part (a defense block, an elongated defense rod) of the present invention.
FIG. 4 is an explanatory view from the left side of the defense block.
5 is a schematic sectional view taken along line 4-4 of FIG.
FIG. 6 is an explanatory view from the bottom of the defense block.
FIG. 7 is a schematic cross-sectional explanatory diagram in which a defense block and an outer cylinder end of a cylinder are coupled via an elongated defense rod.
FIG. 8 is a schematic explanatory view of a cylinder fitting hole of a lock box.
FIG. 9 is a schematic explanatory diagram when the outer cylinder end of the cylinder is inserted into the cylinder fitting hole of the lock box.
FIG. 10 is a schematic explanatory diagram illustrating an example of an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lock box, 2 ... Case body, 3 ... Case lid, 4 ... Mounting plate, 6 ... Front, 7, 8 ... Through-hole, 9 ... Dead bolt, 17 ... Post, 21 ... Receiving seat, 22 ... Fitting hole , 23 ... fitting part, 25 ... dead cam, 26 ... cylindrical engagement part, 27 ... drive arm, 28 ... cylinder fitting hole, 29 ... cylinder, 30 ... outer cylinder end, 31 ... horizontal through hole, 32 ... Protrusions 33 ... Arc-shaped notches 35 ... Defense blocks 36 ... Elongated defense rods 37,38 ... Vertical side walls 39 ... Front walls 40 ... Rear walls 41 ... Top walls 42 ... Bottom walls 45 ... receiving hole, 46 ... central notch, 47 ... mounting hole, 48 ... bottom wall notch, 50 ... horizontal guide hole, 55 ... guide plate.

Claims (4)

The outer cylinder end 30 of the cylinder 29 is inserted into the cylinder fitting hole 28 formed in the wide side wall of the lock box 1, while a pair of upper and lower protrusions 32 of the outer cylinder end 30 are inserted into the inner space of the lock box. A protective block 35 having a plurality of horizontal guide holes 50 respectively communicating with the 32 horizontal through-holes 31, 31 is incorporated, and the protective block 35 is fitted into the fitting portion 23 of the receiving seat 21 on the cylinder side. 45 and dead cam notch portions 46 and 48 communicating with the receiving hole 45, and the defense block 35 and the cylinder 29 are locked from the upper and lower through holes 7 and 8 of the mounting plate 4 of the lock box. A lock-off structure for removing a cylinder from a lock, which is integrally connected in a skewered manner through a plurality of elongated defense rods 36 inserted into the box.   3. The lock-off structure for removing a cylinder from a lock according to claim 1, wherein the defense block is fixed in the lock box through a support column and a mounting hole 47 fixedly provided in the lock box.   2. The structure according to claim 1, wherein the defense block is formed as a single block body.   The defense block 35 according to claim 1, wherein the defense block 35 is fixedly disposed in the lock box, and is connected to a guide plate 55 through which two upper and lower elongated defense rods 36 and 36 penetrate. Detachable cylinder lock structure to lock.

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