JPH057387Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lock for a door, etc., and particularly to a door lock that is auxiliary locked by a chain.

[Prior art]

2. Description of the Related Art Conventionally, a type of lock for a door or the like that is auxiliary locked from inside the room using a chain, which is called a door chain, is known. This door arch is
As is well known, one end of the chain is fixed to the inner wall of a building, and a key-like member attached to the other end of the chain is hung on a latch with a long hole provided in the door to lock the door from inside. The structure is such that the openings do not open beyond a certain distance.

If the door is locked by such a door chain, each time you return home from an outing, you will be able to open the door only after calling the person inside the house and asking them to release the lock by the door chain. It was an unnecessary inconvenience.

[Problem that the invention attempts to solve]

In view of the above circumstances, it is an object of the present invention to develop a door arch that allows anyone who has a key to unlock the door from outside using the key.

[Means for solving problems]

The present invention is a door chain consisting of a lock part and a lock part disposed on the door, and a chain fixed to the door by a lock piece that engages with a lock member movably provided in the lock part, and the lock part can be unlocked with a key. To provide a door arch which solves the above-mentioned problems by moving the lock member by operating the lock and disengaging it from the lock piece so that the lock can be unlocked from outside with a key.

〔Example〕

Next, an embodiment of the door arch of the present invention will be described based on the drawings. FIG. 1 is a sectional view of the main parts of an embodiment of the present invention, showing a lock part 10 and a lock part 2.
0 and these are placed on the door. The lock part 20 is made of a known lock such as a tumbler lock which will be described later. Lock part 10
The lock part 20 includes a lock main body 11 fixed to or integrally formed with the tip of an outer cylinder 21 of a tumbler lock, and a space 11a formed in the lock main body 11, which is housed so as to be movable in the vertical direction. The lock member 12 is arranged on a stepped portion 22a formed at the tip of the inner cylinder 22 of the tumbler lock.
and a spring 13 that constantly presses the lock member 12 downward. 14 is a lock piece attached to the tip of the chain 15, and as shown in the figure, the door 3 is placed under the lock member 12 in the space 11a of the lock body 11 so as to engage with it.
It is inserted from 11b on the indoor side of 0, so it cannot be removed even if it is pulled in the direction of the arrow. As shown in FIG. 6, the other end of the chain 15 has a latch piece 1 similar to the conventional door chain.
6 is attached to the long groove 1 of the latch 17 having a long groove 18 attached to the building in the house.
8 for additional locking.

The tumbler lock as an example of the lock part 20 is the second
It has a structure as shown in the figure. That is, the groove 21
It consists of an outer cylinder 21 having a groove 22a, an inner cylinder 22 having a plurality of grooves 22b, and a disk tumbler 23 disposed in each groove 22b of the inner cylinder 22. A spring is placed at the position where the disk tumblers 23 are arranged to push up these disk tumblers. Therefore, the tip of the disk tumbler 23 is connected to the outer cylinder 21.
The inner cylinder 22 is inserted into the groove 21a of the inner cylinder 21, so that the inner cylinder 22 cannot rotate relative to the outer cylinder 21. This tumbler lock can lock all tumblers 23 by inserting a specific key into the key hole 26, as is well known.
By pressing down, the inner cylinder 22 can rotate relative to the outer cylinder 21. Reference numeral 25 is a retaining pin that prevents the inner cylinder 22 from coming off from the outer cylinder 21 and also prevents the inner cylinder 22 from coming off from the outer cylinder 21.
Rotation is limited to the range of the groove 22c.

The door chain with the above structure is chain 1.
When the lock piece 14 at the tip of the lock piece 5 is pushed in from the indoor side 11b of the door 30, the tapered surface 14a of the lock piece 14 pushes up the lock member 12 of the lock part 10 against the force of the spring 13, as shown in FIG. In this way, the lock member 12 and the lock piece 14 are engaged and cannot be removed. In other words, one end of the chain 15 of the door chain is attached to the door. Furthermore, by hooking the latch to the long groove of the latch attached to the other end of the chain, the door can be auxiliarily locked in the same way as in conventional door chains.

After locking in this way, to release the lock from indoors, just remove the latch piece from the latch in the same way as with conventional locks.

On the other hand, when you come home from outside, you can insert the key into the key groove 26 of the lock part 20 to open the inner cylinder 22.
If you pull the door while rotating the lock piece 14
comes out from the lock part 10, so the door can be opened. That is, if the inner cylinder 22 is rotated in the state shown in FIG. 3, it will be in the state shown in FIGS. 4 and 5. As a result, as shown in FIG.
The lock member 12 and the lock piece 14 are disengaged from each other by being pushed upward. If the door is pulled in this state, the lock piece 14 fixed by the chain will fall out from the lock part 10, allowing the door to be opened.

Also, when you go out, first hang the latch piece in the groove of the latch, then go outside, open the door just enough to fit your arm in, and push the lock piece 14 at the end of the chain into the lock part 11, so that the chain can assist you even from outside. Lock is possible. Therefore, if the door chain of the present invention is used, it can be used as a double lock by auxiliary locking by the door chain from the outside and then closing and locking the door.

Although the above embodiment uses a disk tumbler lock, the lock part 20 is not limited to this, and a pin tumbler lock or a lock other than a tumbler lock may be used.

[Effect of idea]

As explained above in detail based on the embodiments, the door chain of the present invention can be opened from outside the door by anyone who has the key, so the door can be opened without calling a person inside. Not only is it convenient, it can also be used as a double lock for the door, and has a crime prevention effect.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention when it is locked; Fig. 2 is an exploded perspective view of a disc tumbler lock as an example of the lock portion of the embodiment of the invention;
The figure is a cross-sectional view taken along the line -- in FIG. 1, FIG. 4 is a cross-sectional view of the embodiment of the present invention when the lock is released, FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4, and FIG. FIG. 3 is a diagram showing a state in which the door chain is attached to the door. 10...Lock part, 11...Lock part body, 1
2...Lock member, 13...Spring, 14...
...Lock piece, 15...Chain, 20...Lock part.

Claims (1)

[Scope of utility model registration request] The lock part 20 is attached to the door and the lock part 10. The lock part 20 is made of an outer cylinder 21 and an inner cylinder 22a formed at the tip thereof, which can be rotated with respect to the outer cylinder 21 by a key from the outside of the door.
The lock portion 10 has a lock portion body 11 located at the tip of the outer cylinder 21, and the lock portion body 11 has a space 11 extending in a direction away from the axis of the inner cylinder 22 near the tip surface of the inner cylinder 22.
a and another space extending from the inner cylinder 22 along the axis of the inner cylinder 22 to reach the interior side of the door, a lock member 12 having a step is housed in the space 11a of the lock portion main body 11 so as to be movable within the space 11a, the lock portion main body 11 has a spring 13 which presses the lock member 12 on its axial side so that the lock member 12 comes into contact with the step 22a of the inner cylinder 22, a tapered surface 14a is formed, and a chain 15 is connected to a lock piece having a step which meshes with the step of the lock member, and the lock member 12 is inserted into the space along the axis of the inner cylinder 22 from the interior side.
The lock piece 14 is inserted from the inside of the room, and by utilizing its tapered surface 14a it is pushed in while moving the lock member 12 away, and then the step of the lock piece engages with the step of the lock member, thereby locking and preventing the door from opening. Also, by rotating the inner tube 22 with a key, the lock member 12 in contact with the step 22a comes into contact with the outer surface of the inner tube 22, thereby moving the lock member 12 away from its axis against the force of the spring 13, thereby moving the lock member 12 away from the lock piece 14, disengaging the engagement between the two steps and releasing the lock. If the door is opened in this state, the lock piece 14 which is connected and fixed to the chain 15 will come out toward the inside of the room, allowing the door to be opened.