JP2002242493A - Lock structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent theft by forcible opening, while keeping the cost of a facility low. SOLUTION: A lock structure that restrains the opening and closing of a door body by fitting a locking tab into the door body through the operation of turning a key is a technical premise. A vertical groove is provided in a position (end position) near the inserted end of the locking tab.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for various doors and drawers (wings) which can be opened and closed, and more particularly to a structure of a lock tongue for preventing forced prying from the outside.

[0002]

2. Description of the Related Art In many cases, coin lockers installed in various doors, for example, in station yards, are installed in places where a third party other than the user can freely enter and exit, and the monitoring system is not always sufficient. Often. The same applies to office building doors and desk drawers.

Accordingly, various locks are provided on such an opening / closing section (hereinafter described with a locker door as an example) to prevent theft. Conventionally proposed techniques include, for example, a system that enhances the safety of a lock device by making the unlocking operation of a key device difficult (Japanese Patent Laid-Open No. 09-04935).
5 etc.). These prior arts are techniques for improving the softness of an electric / electronic lock device that mainly controls locking and unlocking of the lock device.

[0004] On the other hand, there has not been a technical proposal for theft in which the door of a locker is forcibly opened with a bar or the like. According to the actual situation of the theft accident, it is said that locking can be performed using any complicated electronic lock system. A simple operation is required in the locker structure. As a measure to be taken when forced prying is performed, for example, JP-A-2000-22
Actually, there is only a means of issuing an alarm using a sensor as in 5052.

[0005]

However, lockers used in various ways, such as pay lockers installed in station yards and resort facilities, are individually provided with an alarm device linked with a sensor or have a complicated number. It is not practical to introduce a locking device that seeks input.

[0006] This is because the sensor-linked alarm device surely raises the cost of the locker equipment, causes a failure, and raises concerns about maintenance costs. Also,
Various improvements based on the electronic lock can be said to be excellent technologies unless assuming theft by forcible prying, but they are completely ineffective against theft technology in which the locker door itself is prying open by external force.

Accordingly, an object of the present invention is to provide a door using a tongue piece that reliably prevents theft due to forced prying while keeping the equipment cost low.

[0008]

In order to achieve the above object, a lock structure according to the present invention is characterized in that a lock tongue is inserted into a door body by rotating a key to restrict opening and closing of the door body. Assuming the structure as a technical premise, a vertical groove is provided at a position (tip) near the insertion side end of the locking tongue.

[0009]

The locking tongue according to the present invention has a vertical groove near the insertion side end, but in normal use, the groove (recess, concave groove; sectional shape of the groove does not matter). It performs the same function as a conventional flat plate-shaped locking tongue that does not have any. Since the tongue for locking enters the inside of the door main body through the tongue opening on the side of the door main body to lock the door, a rigid metal panel material having a certain thickness or more is used. As long as the grooves are provided, there is no problem of durability and safety at all.

On the other hand, when the door body is to be pryed open using a forcing device such as a crowbar, the panel material constituting the door body must be pivoted about a locking tongue piece and a fixed hinge at a position opposite to the left and right. An operation is performed so as to move (turn) toward the criminal. In this case, when a groove is formed near the tip of the locking tongue, the panel material of the opening for inserting the locking tongue into the door body fits into the groove or is caught in the groove, Limit further free movement of the door. For this reason, the door cannot be moved to the near side with the external force that can be normally assumed by human power.

[0011]

1 to 4 show an embodiment of a lock structure according to the present invention, and FIGS. 5 and 6 illustrate a coin locker. As shown in FIGS. 5 and 6,
The overall configuration of the lock mechanism 11 has substantially the same appearance as the structure / mechanism normally arranged on the door 12 such as a coin locker. In FIG. 5, reference numeral 14 denotes a frame portion of the locker main body, 15 denotes a coin insertion portion (slit), 16 denotes a hole for inserting a locking / unlocking key, 17 denotes a coin return port, and 20 denotes a locking tongue.

When the locking tongue piece 20 is locked, it is inserted into an insertion opening 19 formed in the end face 18 of the door 12 as shown in FIG.
That is, in a state where the locking / unlocking key is removed, the locking tongue piece 20 is fixed so as not to move forward and backward.

In the locking tongue piece 20 according to the present invention, a groove 25 is formed in the tip end on the insertion side in the vertical direction. As shown in FIG. 3, the groove 25 is a linear groove penetrating from the upper end face 22 </ b> P of the panel body 22 of the locking tongue piece 20 to the lower end face 22 </ b> W. The cutting depth of the groove 25 can be appropriately designed according to the thickness of the panel body 22, but is, for example, about 2 to 5 mm. The width of the groove 25 is, for example, 1 to 10 mm.
Degree.

The locking tongue 20 having the groove 25 locks the door 12 in a state as shown in FIG. Arrow N indicates the opening / closing direction of the door, 31 indicates the hinge of the door 12, 33 indicates the upper end surface of the door 12, and the portion indicated by the broken line 35 will be the door 12
The thickness of the panel material, particularly its thickness. The groove 25 is formed on a surface opposite to the side on which the lock mechanism 11 is arranged, such as the coin insertion portion 15, that is, on the inside of the locker. The internal space of the locker is indicated by the symbol S. Reference numeral Q denotes a gap generated between the frame portion 14 of the locker main body and the door 12.

According to such a configuration, when the gap Q is opened by using a bar or the like and the door 12 is forcibly opened, the following occurs (see FIG. 1). First, an instrument 41 such as a crowbar
In the first stage in which the door 12 is inserted into the gap Q and the gap Q is forcibly expanded, the door 12 moves toward the distal end of the locking tongue piece 20. The moving direction of the door 12 is indicated by an arrow C. The movement of the door 12 in this case is a relative position change in relation to the locking tongue piece 20, and the door 12 does not always move in the direction of arrow C. As a result of the frame portion 14 of the locker body moving in the opposite direction, the door 12 is
May move in the direction of the tip.

Next, by utilizing the gap Q that has been opened, the door 1
In the second stage of opening the front panel 2 toward the front (door opening direction N), the end panel of the insertion opening 19 enters the groove 25,
Limit further door opening movements. That is, the door 12
It will not open any more with normal forced external force. Reference numeral 3 denotes an end panel of the insertion opening 19 that enters the groove 25.
Shown as 5G. This end panel 35G has an insertion opening 1
9 is a side end on the back side (the inner space S side of the locker) of the panel material 35 that defines 9. In addition, the same part is shown as 35G in FIG. 6 for easy understanding.

FIG. 2 is an enlarged view showing a state where the end panel 35G is fitted in the groove 25. This is a state in which the door 12 is about to be forcibly opened by an instrument 41 such as a crowbar. Therefore, the insertion opening 19 and the panel member 35 defining the insertion opening 19 are also positioned and angled with respect to the groove 25. Is relatively changing. In any case, since the panel material end (35G) defining the insertion opening 19 fits into the groove 25, the door 12 does not further open against the forced external force.

Experiments have shown that the door 12 can be prevented from being pryed open even if the panel material end (35G) defining the insertion opening 19 does not completely fit into the groove 25. That is, even when the panel material end (35G) defining the insertion opening 19 is caught in the groove 25, further door opening is impossible. Therefore, when the panel thickness of the product is set to, for example, 1.2 mm, the width of the groove 25 may be set to a smaller dimension, for example, 1 mm. Although the thickness of the panel is larger than the width of the groove 25, the end (35G) of the panel material is caught in the groove 25 and performs the same operation as when it is completely fitted.

The locking tongue piece 20 is preferably a rigid metal panel having a predetermined thickness. However, the locking tongue piece 20 is not limited to a flat plate, but may be of a suitable shape such as a round bar or a square bar. This is because the presence of the groove 25 produces the same result in that the defining panel surface of the insertion opening 19 restricts the movement of the door 12. Further, as long as such a locking tongue piece 20 is applicable, it can be used not only for a coin locker but also for various locks such as a locker in a changing room such as a sauna or a golf course, an office building or a door for a house. . Further, as a matter of course, it may be used for a lock other than the door (door) like a drawer of a desk.

The cross-sectional shape of the groove (25) may vary depending on the cutting tool, and may have an appropriate shape. For example, a U-shaped cross section with a corner, a U-shaped cross section with a sufficient depth,
It has a tapered shape. Further, the depth dimension (width dimension of the end face) on the insertion opening 19 side of the door 12 can be freely set, and it is desirable that the door end face is designed to have an appropriate thickness in accordance with an assumed forced external force. The locking tongue according to the present invention is applicable not only to a coin locker but also to various key lock structures.

[0021]

As described above, according to the lock structure of the present invention, it is possible to reliably prevent theft due to forced prying while keeping the equipment cost low.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the operation of a locking tongue according to the present invention.

FIG. 2 is an enlarged view showing a locking tongue piece of FIG. 1;

FIG. 3 is a perspective view illustrating the appearance of a locking tongue piece according to the present invention.

FIG. 4 is a diagram illustrating the position of a groove according to the present invention in relation to a door.

FIG. 5 is a diagram illustrating an entire configuration around a lock mechanism according to the present invention.

FIG. 6 is a diagram illustrating a general function of a locking tongue according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Lock mechanism 12 Door 14 Locker main body frame part 15 Coin insertion part 16 Key hole 17 Coin return port 18 Door end face 19 Insertion opening 20 Locking tongue piece 22 Panel main body 22P Upper end face of panel main body 22W Lower end face 25 Groove 31 Hinge 33 Upper end surface of door 35 Panel material (thickness) 35G End panel 41 Equipment such as bar S Internal space of locker Q Gap

Claims (1)

[Claims] 1. A lock structure in which a locking tongue is inserted into a door body by a rotation operation of a key, and the opening and closing of the door body is restricted. The lock structure characterized by providing.