JP2005320706A - Lock box structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock box capable of preventing illicit unlocking even if a thin plate is inserted into the lock box from a hole for allowing a dead bolt to go in and out. <P>SOLUTION: This lock box structure is locked and unlocked by rotating a potbelly 3 in the predetermined direction by engaging a locking-unlocking arm 4 integrally formed in the potbelly 3 connected to a cylinder lock or a thumb-turn with a driven cutout 5, by movably guiding the dead bolt 1 for integrally forming the driven cutout 5 in the longitudinal direction vertical to a front plate 2 in the lock box. A card body 11 is arranged between the tip of the locking-unlocking arm 4 and the front plate 2 when locking a lock. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure of a lock box (hereinafter simply referred to as a lock box), and in particular, can effectively prevent unauthorized unlocking by inserting a thin plate into the lock box from a bolt hole or the like opened in the front plate of the lock box. Regarding the lock box.

  The present applicant has previously proposed a lock box capable of preventing unauthorized unlocking by inserting a thin plate into a lock box through a hole through which a so-called trigger bolt enters and exits, as described later in Patent Document 1.

  In this lock box, as shown in FIG. 1, a dead bolt that also serves as a latch bolt with a bolt head 1a having a slope attached to the tip is biased in a direction to engage the tip 5a with a step portion of the bolt head 1a. In the lock box of the lock which is controlled to be locked and unlocked by the locking arm 5, a trigger cover 15 having an L-shaped cross section is provided so as to surround the tip 5a of the locking arm.

The lock box shown in FIG. 1 prevents a trigger 7 and a thin plate from being inserted into a hole through which the trigger 7 opened in the front plate 2 enters and exits, and the tip of the locking arm is illegally manipulated by the thin plate. To do.
Japanese Patent Application No. 2003-182751

  On the other hand, the type of lock is not limited to that shown in FIG. 1. For example, as shown in FIG. 2, a lock / unlock arm 4 integrated with a duller 3 connected to a cylinder lock or thumb turn (not shown) is formed on the dead bolt 1. In general, the dead bolt 1 is moved in and out of the front plate 2 by engaging the driven notch 5 and rotating the dharma 3 in a predetermined direction.

  The lock shown in FIG. 1 is of a type in which the dead bolt 1 protrudes when locked and the hook 8 descends while rotating counterclockwise and engages with the strike 9. This hook 8 is essential for the present invention. Not fair.

  In the lock box having the above-described configuration, an unnumbered bolt hole through which the dead bolt 1 opened in the front plate 2 enters and exits operates the dead bolt 1 smoothly. Create a gap.

  Therefore, as is clear from FIG. 2, it is possible to insert a thin steel plate or the like from the gap between the hole where the dead bolt enters and exits and the dead bolt and push the locking / unlocking arm 4 inward to perform unauthorized unlocking. .

  Accordingly, an object of the present invention is to provide a lock box that cannot be unlocked illegally even if a thin plate is inserted into the lock box through a hole through which a dead bolt enters and exits.

  In order to achieve the above object, the invention according to claim 1 is directed to guide a dead bolt integrally formed with a driven notch in the lock box so as to be movable in the front-rear direction perpendicular to the front plate. Alternatively, the locking / unlocking arm formed integrally with the dharma connected to the thumb turn is engaged with the driven notch, and the dharma is rotated in a predetermined direction for locking / unlocking. A guard body is provided between the front end of the locking / unlocking arm and the front plate.

  According to the first aspect of the present invention configured as described above, even if the locking / unlocking arm is illegally used by inserting a thin plate into the lock box through the gap of the hole through which the dead bolt enters and exits, the tip is guarded. Since the body is prevented from being inserted further or deflected in an undesired direction, the locking / unlocking arm cannot be operated by the thin plate, and thus the desired effect of preventing unauthorized unlocking can be achieved.

  Moreover, since it is only necessary to provide a guard body having a simple structure in the vicinity of the locking / unlocking arm, there are various effects such as extremely easy implementation.

  By simply providing a guard body between the front end of the locking / unlocking arm and the front plate when locking the lock, complete unauthorized unlocking by inserting a thin plate through the gap between the dead bolt hole and dead bolt Can be prevented.

Embodiments of the present invention will be described below with reference to FIGS.
3 and 4, reference numeral 11 denotes a guard body. As shown in FIG. 3, the guard body 11 has an angular position of the locking / unlocking arm at the time of locking, that is, the locking / unlocking arm is closest to the front plate 2. An angle position is provided between the front end of the locking / unlocking arm and the front plate.

  As shown in FIGS. 3 and 4, the guard body 11 in the illustrated embodiment is a plate-like body whose section is bent in an L shape, and the engagement pieces 12 projecting from the upper and lower ends in FIG. By inserting 12 into an engagement hole (not shown) opened in the side plate of the lock box, it is mounted in the lock box.

  As is clear from FIG. 3, if it is only to counter unauthorized unlocking, only the vertical part of the guard body 11 (part parallel to the front plate 2 in FIG. 3) is required, and that part is also vertical. Although it is not necessary, if the cross section is L-shaped as shown in FIGS. 3 and 4, the manufacture is ready, and the guard body 11 is satisfactorily seated when assembled with the lid (one side plate) of the lock box open. This is preferable because assembly is facilitated.

  The lock box according to one embodiment of the present invention configured as described above guards the tip of the locking / unlocking arm 4 in a manner in which the guard body 11 is straddled between a pair of side plates of the lock box. Even if a thin plate is inserted through the gap between the entrance and exit, further insertion is prevented by the guard plate 11, or the direction of the tip is deflected by the guard body 11, so that the thin plate is brought into contact with the locking / unlocking arm. Can not even be performed, and therefore, unauthorized unlocking can be completely prevented.

  For the same reason, a thin plate is inserted into the lock box from the vertical gap of the hole where the dead bolt enters and exits, in other words, a horizontal thin plate is inserted into the side plate of the lock box in FIG. Even if an attempt is made to attack the locking / unlocking arm 4 by swinging it, the tip cannot be inserted into the left side of the locking / unlocking arm 4 in FIG. 3, and thus unauthorized unlocking can be completely prevented.

The partial cross section partial side view of the conventional lock box. The partial cross section side view of another conventional lock box. The partial cross section side view of the lock box by one Example of this invention. The external appearance perspective view of a guard body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dead bolt 2 Front board 3 Dharma 4 Locking / unlocking arm 5 Driven notch 8 Kama 9 Strike 11 Guard body 12 Engagement piece

Claims (1)

  In the lock box, a dead bolt integrally formed with a driven notch is guided so as to be movable in the front-rear direction perpendicular to the front plate, while a locking / unlocking arm formed integrally with a cylinder lock or a dharma connected to a thumb turn is provided. A guard body is provided between the front plate and the front end of the locking / unlocking arm at the time of locking before locking, in which locking is performed by engaging the driven notch and rotating the dharma in a predetermined direction. A structure of a lock box characterized by that.

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