JP2002038784A - Door chain with key - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door chain with a key which protects an engaging ring from being disengaged from a groove of an engaging fixture, by inserting the engaging ring attached to the door chain into the engaging groove of the engaging fixture mounted on a door, and locking the door. SOLUTION: The door chain inhibits opening of the door by engaging the engaging ring 14 arranged at an end of the chain fixed to a wall surface, with the engaging groove 4 of the engaging fixture 2 fixed onto an internal surface of the door. The engaging groove 4 has an opening 5 at an upper portion thereof, for penetrating the engaging ring 14 therethrough, and a notch 9 at a mid point thereof, for penetrating the engaging ring 14 therethrough. Then, a key is attached to the notch, which has a key body for blocking the notch so as to have the same width as that of the engaging groove when the door is locked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door chain with a key which allows a door chain to be hung from the outside of a door when going out or the like. The present invention relates to a keyed door chain in which a locking ring cannot be removed from a groove of a locking fitting by inserting the locking ring into a locking groove of a locking fitting attached to the lock fitting.

[0002]

2. Description of the Related Art Conventionally, in order to prevent crimes, when a person is at home, not only the door is locked but also a door chain is used. In this way, when another person comes, the door is opened a little while the door chain is hung, so that the other person can be checked to prevent a crime. However, the general door chain as described above has a configuration in which the chain can be attached and detached only from the inside with the door closed, so that when a family member goes out, the key attached to the door body is locked. By itself, the door chains could not be hung and the doors were not tightly closed. Also, when the door chain is hung, the door chain cannot be removed from the outside of the door, so, for example, when returning home at midnight, it is necessary to wake up the family and have the door chain removed. There are inconveniences.

[0003] An apparatus disclosed in Japanese Patent Application Laid-Open No. 57-12708 is known as an apparatus which can solve the above-mentioned problems and can attach and detach a door chain from the outside and lock the chain.
The security chain described in this publication is provided with an attachment / detachment opening (opening) of a chained stop (locking ring) above and below a locking groove provided in a pedestal (locking fitting). It is pushed against the entrance of the stopper from the opening, allowing it to pass upward, releasing the support of the stopper with the key, sliding the stopper into the lower mounting hole, and locking the stopper. It is characterized by having a stopper that can be removed from

[0004]

However, since the security chain described in this publication has a configuration in which the door chain is detached from the outside of the door by a fitting key, a keyhole is required on the outside of the door. The chain can be easily removed using a wire or the like, and the security is poor. In addition, since there is a keyhole on the outside of the door, there is a problem that the keyhole is easily visible.

In view of the above, the present invention is provided with a notch through which a locking ring attached to a door chain can be penetrated in the middle of a locking groove of a fitting fixed to the inside of a door. A keyed door chain provided with a key capable of closing the notch so as to have the same groove width as the locking groove, and the locking ring can be removed from the locking groove only when the key is removed. By doing so, it aims at solving the above-mentioned problems.

[0006]

Means for solving the problems adopted by the present invention are to provide a locking groove of an engaging metal fitting fixed inside the door and an end of a chain fixed to the wall surface side. A door chain that prohibits the opening of the door by engaging the locking ring, wherein the locking groove has an opening at an upper portion through which the locking ring can pass, and the locking groove is provided in the middle of the locking groove. A key having a key body capable of closing the notch so as to have the same groove width as the locking groove at the time of locking. A keyed door chain. The key is a key that can be pulled out only when the key is locked. Further, a tip end of the locking ring is formed in a conical shape, so that it is easy to insert the opening into the opening. Further, the keyed door chain is characterized in that the periphery of the keyhole of the key is formed in a substantially mortar shape so that the key can be easily inserted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described by way of embodiments with reference to the accompanying drawings. FIG. 1 is a perspective view of a door chain with a key according to the present invention, FIG. 2 is a front view of a locking fitting in a locked state, FIG. 3 is a sectional view taken along line AA in FIG. 2, and FIG. 5 is a front view of the locking fitting in an unlocked state, and FIG. 6 is a BB view in FIG.
It is sectional drawing.

In FIG. 1, a door chain 1 has a lock 2 and a chain 3. The lock 2 includes a lock groove 4 and a lock ring 14 formed above the groove 4. It is formed by a front member 6 having an opening 5 that can be fitted, and a back member 7 connected to the front member by welding or the like. The front member 6 is formed so as to have a space 8 with respect to the back member 7 as shown in the figure, and a locking ring 14 described later can be fitted into the space 8. As shown in FIGS. 2 and 5, a notch 9 into which the locking ring 14 can be inserted is formed in the middle of the locking groove 4. The key body 10 is shown in FIG.
In FIG. 5, it is movably attached to the left and right.

The key body 10 is assembled integrally with a key 11 fixed to the rising wall surface of the front member 6, and the key body 10 is inserted into the keyhole 13 and operated to move the key body 10 forward and backward. 9 can be closed or opened. The vicinity of the keyhole 13 of the key 11 is formed in a mortar shape as shown in FIG. 4 to facilitate the operation of inserting the key 12. The key 12 can be pulled out from the keyhole 13 only when the key is in the locked state.

[0010] A chain 3 to be set together with the locking fitting 2
One end of the chain 3 is fixed to a wall around the door as shown in FIG. 1, and a locking ring 14 that engages with the locking groove 4 is attached to a tip of the chain 3. The locking ring 14 has a distal end formed in a conical shape 14a, and has a shape in which the locking ring 14 can be easily inserted into the opening 5 formed in the locking metal fitting. It is formed as a small diameter portion 14b so that it does not come out of the locking groove 4 when engaged with the groove 4.

The operation of the keyed door chain having the above configuration will be described. In the figure, when a family member is at home, a key 11 attached to a door chain is locked.
In this state, the key body 10 has the cutout 9 formed in the locking groove 4.
And the locking groove 4 is a continuous groove. The key can be pulled out when the key is locked, so the key is pulled out. When hanging the door chain, the door is closed, the locking ring 14 of the door chain 3 is inserted into the opening 5 of the locking metal fitting 2 and dropped into the locking groove 4.
Like a conventionally known door chain, the door cannot be opened beyond the length of the chain, and the door is prevented from being opened. Further, when the locking ring 14 is moved upward and pulled out from the opening 5 continuous with the locking groove 4, the door chain can be removed. In this way, in the present door chain with a key, by locking the door chain, it is possible to perform the same function as the conventional door chain.

When going out, a key is inserted into the keyhole 13 and operated to move the key body 10 to a position where the notch 9 formed in the locking groove 4 is opened (see FIG. 6). In this state, the key remains inserted in the key. Then, open the door and go out, put your hand through the gap between the door and the wall,
4 is dropped from the notch 9 into the locking groove, and the key is operated to move the key body 10 in a direction to close the notch 9 formed in the locking groove. In this state, the notch of the locking groove is closed, so the locking ring cannot be removed from the locking groove,
The door chain is locked. The key can be pulled out from the keyhole 13. Thereafter, the door can be locked with the door chain locked by locking the door body as usual. When returning home, after opening the key of the door body, the user puts his hand through the gap between the door and the wall, operates the key, and moves the key body 10 in the direction of opening the cutout 9 formed in the locking groove. In this state, the notch of the locking groove is opened, so that the locking ring can be easily removed from the locking groove. After entering the house, operate the key to move the key body in the direction to close the notch, and pull out the key to return to normal use.

It should be noted that various keys can be used as long as the key used in the above embodiment can be closed or opened in the notch formed in the locking groove. Various notched shapes can also be used as long as they are continuous with the locking groove and can insert the locking ring. Further, the material of the locking metal can be made of various materials as long as there is no possibility of deformation or the like. Furthermore, the present invention may be embodied in various other forms without departing from its spirit or essential characteristics. Therefore, the above-described embodiment is merely an example and should not be construed as limiting. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

[0014]

As described above, according to the present invention, the door chain can be hung from the outside of the door, which is extremely effective in crime prevention. At that time, if the door chain is hung, it can give an illusion that the housekeeper is inside the house. In addition, since there is no keyhole of the door chain outside the door, the key of the door chain can only be opened from the inside of the door, it takes time to break the key, and it securely prevents the intrusion of thieves. it can. In addition, when the family member is at home, by locking the door chain, the same function as the conventional door chain can be performed, and there is no inconvenience. Further, the present invention has a simple structure because the notch is formed in the locking groove of the locking metal, and the notch is merely provided with a key that closes or opens the notch. Excellent effects such as easy manufacturing cost can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a door chain with a key according to an embodiment of the present invention.

FIG. 2 is a front view of the locking fitting in a locked state.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a perspective view around a keyhole of a key attached to a door chain.

FIG. 5 is a front view of the lock in an unlocked state.

FIG. 6 is a sectional view taken along line BB in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door chain 2 Locking fixture 3 Chain 4 Locking groove 5 Opening 6 Front member 7 Back member 8 Space 9 Notch 10 Key body 11 Key 12 Key 13 Keyhole 14 Lock ring

Claims (4)

[Claims] 1. A door chain for inhibiting the opening of a door by engaging a locking ring provided at an end of a chain fixed to a wall surface with a locking groove of an engagement metal fitting fixed inside a door. Wherein the locking groove has an opening at an upper portion through which a locking ring can be passed, and in the middle of the locking groove,
A notch through which a locking ring can be passed is provided, and a key having a key body capable of closing the notch so as to have the same groove width as the locking groove when locking is attached to the notch. And door chains with keys. 2. The door chain with a key according to claim 1, wherein the key is a key that can be pulled out only when the key is locked. 3. The keyed door chain according to claim 1, wherein a tip of the locking ring is formed in a conical shape to facilitate insertion into the opening. 4. A door chain with a key according to claim 1, wherein the periphery of the key hole of the key is formed in a substantially mortar shape so as to facilitate insertion of the key. .