JPH0712587Y2 - Door lock mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a door locking mechanism, for example, to a door locking mechanism such as an automatic teller machine for storing securities.

[Conventional technology]

For example, the housing body of an automatic teller machine or the like has a door on the back surface for taking in and out cash and for maintaining the device,
The door has a lock mechanism.

Such a conventional example will be described below with reference to the drawings.

FIG. 4 is a rear perspective view of the automatic teller machine, FIG. 5 is a rear view of the lock mechanism, and FIG. 6 is a rear view in a locked state. It is a door that can be opened and closed by a hinge 3 on the back, and a knob 4 on the outside.
Is projectingly provided, and a lever 5 operated by the knob 4 is connected to the inside thereof, and the ends of the lock links 6a and 6b are rotatably attached to both ends of the lever 5.

Reference numerals 7a and 7b are guide members, which are attached to the back surface of the door 2 and guide the front ends of the lock links 6a and 6b.

Communication holes 8a and 8b are formed in the upper and lower edges of the door 2 at positions where the lock links 6a and 6b face each other, and the upper and lower edges of the back of the main body 1 are also locked to the positions opposite to the communication holes 8a and 8b. Hole 9a,
9b is open.

According to the above configuration, at the time of opening, open the lock (not shown),
As shown in FIG. 5, the lock links 6a and 6b for operating the knob 4 to make the lever 5 horizontal are respectively pulled inward and retracted, and the tips thereof are pulled out from the locking holes 9a and 9b of the main body 1 and the door 2 Can be opened.

Next, in order to close the door 2, the knob 4 is operated to make the lever 5 vertical as shown in FIG. 6, so that the lock links 6a and 6b are locked.
Are pushed outward, and their tips are fitted into the communication holes 8a, 8b and the locking holes 9a, 9b, so that the door 2 is closed.

[Problems to be solved by the device]

According to such a conventional technique, it is widely used because it has a simple structure, is easy to operate, and is relatively excellent in crime prevention. However, since the door is made of a thin steel plate,
As shown in the figure, when a bar A is inserted between the periphery of the back of the main unit and the door and pry it open, the lock link is also slanted and pulled as the door flexes, and eventually the tip disengages from the locking hole and the door is closed. Is released and can be opened, which is a security problem.

[Means for solving the problem]

In order to solve this problem, the present invention is to connect a lever to a knob of a door provided in a housing body, and rotatably attach one end of a lock link to both ends of the lever, and operate the lock link by operating the lever. In the lock mechanism of the door, which locks the door by fitting the other end of the door into the locking holes provided in the upper and lower edges of the main body through the communication holes provided in the upper and lower edges of the door, A locking groove is formed at the tip, and the locking groove is set so as to be located at a portion protruding from the locking hole when the tip of the lock link is fitted into the locking hole when the door is locked. The diameter of the locking hole is set so that the locking groove is caught around the locking hole when the lock link is inclined to forcibly open the door.

[Action]

According to the above configuration, even if an attempt is made to bend the door by using an instrument and pry open, the locking groove of the lock link that is slanted due to the bending of the door is caught in the locking hole to prevent the door from being opened. You can do it.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In the following description, the same parts as those in the above-mentioned conventional technique will be described using the same reference numerals.

FIG. 1 is a rear view of the lock mechanism, and FIG. 2 is an enlarged view of an essential part. In the figure, 1 is a main body of the automatic teller machine, 2 is a door provided behind it by a hinge 3 so as to be opened and closed, A knob 4 is provided on the outside and a lever 5 operated by the knob 4 is connected on the inside. The ends of the lock wrinkles 10a and 10b are rotatably attached to both ends of the lever 5. There is.

A locking groove 11 is formed around the tips of the lock links 10a and 10b.
a and 11b are formed, and the width of this groove is slightly wider than the plate thickness of the locking holes 9a and 9b provided at the upper and lower edges of the back of the main body 1. In addition, the position of this locking groove is
When the tips of a and 10b are fitted into the locking holes 9a and 9b, the locking holes
It should be located at the part that extends from 9a and 9b.

Reference numerals 7a and 7b are guide members, which are attached to the back surface of the door 2 and guide the front ends of the lock links 10a and 10b.

Communication holes 8a and 8b are formed in the upper and lower edges of the door 2 at positions where the lock links 10a and 10b are opposed to each other, and the upper and lower edges of the back of the main body 1 are also locked to the positions opposite to the communication holes 8a and 8b. Hole 9
a and 9b are open.

According to the above configuration, at the time of opening, open the lock (not shown),
As shown in FIG. 1, when the knob 4 is operated to make the lever 5 horizontal, the lock links 10a and 10b are pulled inward and retracted, and the tips of the lock links 10a and 10b are pulled out from the locking holes 9a and 9b of the main body 1 and the door 2 is opened. Can be opened.

Next, in order to close the door 2, the knob 4 is operated to make the lever 5 vertical as shown in FIG.
0b are pushed out respectively, and the tip ends are communication holes 8a, 8b.
And the door 2 is closed by being fitted into the locking holes 9a and 9b.

Therefore, when a bar or the like is inserted between the periphery of the back portion of the main body 1 and the door 2 to pry it open, the door 2 bends and tries to pull the lock links 10a and 10b inward.
a and 10b are not pulled vertically but are slanted in the front-back direction (see Fig. 7)
As shown in FIG. 3, the locking grooves 11a, 1
1b is caught around the locking holes 9a, 9b and cannot be removed,
This can prevent the door 2 from opening.

In the above embodiment, one lock groove is provided for each lock link, but if two or more lock grooves are formed, the next lock groove will lock even if one lock groove is accidentally removed. Therefore, further safety can be expected.

[Effect of device]

As described above, according to the present invention, the lever is connected to the knob of the door provided on the housing body, and one end of the lock link is rotatably attached to both ends of the lever. In the door locking mechanism that locks the door by fitting the ends into the locking holes provided in the upper and lower edges of the main body through the communication holes provided in the upper and lower edges of the door, A locking groove is formed, and the locking groove is set so as to be located at a portion protruding from the locking hole when the front end of the lock link is fitted into the locking hole when the door is locked. The diameter of the locking hole is set so that when the lock link is tilted and the locking link is tilted, the locking groove is set so that the locking groove is hooked around the door. You can surely prevent the opening of the door, Effect is obtained that can realize a locking mechanism of the high security performance door in a single configuration.

Further, the conventional device can be dealt with only by exchanging the lock link.

[Brief description of drawings]

FIG. 1 is a rear view of a lock mechanism, FIG. 2 is an enlarged view of essential parts, FIG. 3 is an explanatory view showing a locked state of a lock link, and FIG. 4 is a rear perspective view of an automatic teller machine, and FIG. Is a rear view of the lock mechanism of the conventional example, FIG. 6 is a rear view of the lock mechanism in a locked state, and FIG. 7 is an explanatory view of a prying open state. 1 …… Main body 2 …… Door 5 …… Lever 9a, 9b …… Locking hole 10a, 10b …… Lock link 11a, 11b …… Locking groove

Claims (1)

[Scope of utility model registration request] 1. A lever is connected to a door knob provided on a housing body, and one end of a lock link is rotatably attached to both ends of the lever. The other end of the lock link is attached to the door by operating the lever. A door locking mechanism that locks the door by fitting it into the locking holes provided at the top and bottom edges of the back of the housing body through the communication holes provided at the top and bottom edges. A groove is formed, and the locking groove is set so as to be located at a portion protruding from the locking hole when the tip of the lock link is fitted into the locking hole when the door is locked. A lock mechanism for a door, wherein a diameter of the locking hole is set such that the locking groove is caught around the locking hole when the lock link is inclined to forcefully open the locking link.