JPH10121809A - Aseismic lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unlock an aseismic lock securely even when a door and a door frame are distorted at the time of emergency such as earthquake and increase the safety against the break of the lock at normal time. SOLUTION: A parallel locking bar 16 is provided in the vicinity of a dead bolt 1, a rear end thereof is supported in such a manner that it can turn, and a front end thereof is energized in the direction in which it is engaged with a locking part of the dead bolt 1 from the back thereof. On the other hand, a release member 19 which releases the engagement of the dead bolt 1 and the locking bar 16 in the interlocking relationship with a dead cam 9 is provided. Furthermore, a regulation member 23 which is extended in substantially vertical direction in such a manner that it crosses a latch bolt 2, supports a basic end thereof in such a manner that it can turn freely, and engages a free end thereof with the dead bolt 1 is provided. At the time of locking when the dead bolt 1 protrudes, a free end part of the regulation member 23 approaches a latch head 2a and interferes with its travel locus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an anti-shock lock,
In particular, doors and door frames are distorted by impacts caused by earthquakes, etc.
The present invention relates to an anti-seismic lock that can reliably release the lock even when a large lateral pressure is applied to the lock bolt, and can enhance the safety even in a normal use state.

[0002]

2. Description of the Related Art As shown in FIG. 4, a general locking device has a dead bolt 1 for locking and a latch bolt 2 for temporarily locking a door to a door frame.

The dead bolt 1 is operated by the inner cylinder of the cylinder lock 3 from the outside of the door, and by the thumb turn 4 from the inside, and the latch bolt 2 is operated by a door operating member 5 (hereinafter simply referred to as a handle or knob). The handle is called).

The latch bolt 2 bears the so-called lateral pressure when the door is closed, that is, the reaction force exerted on the bolt by the force for locking the door to the door frame.

That is, when the dead bolt 1 and the latch bolt 2 are both inserted into the strike bolt receiving holes of the door frame, respectively, the latch bolt 2 is in contact with the opening edge of the receiving hole. Are loosely fitted in the bolt receiving holes.

Since the latch bolt 2 is operated by a handle 5 such as a handle, the operating force is large.
This is because, even if lateral pressure is applied, the operation can be performed in a direction in which this can be smoothly retracted.

However, in the conventional locking device having the above-described configuration, when the door or door frame is distorted by an impact such as an earthquake after locking, and a large lateral pressure is applied to the latch bolt 2, if the unlocking procedure is mistaken, the unlocking is performed. There is a danger that, for example, it will not be possible to escape from a room where a fire has occurred.

That is, the correct procedure is to first retract the dead bolt 1 with the key or the thumb turn 4 and then retract the latch bolt 2 with the handle 5. In this case, even if the lateral pressure applied to the latch bolt 2 is large. Since the operating force of the handle 5 is large, the latch bolt 2 can be moved somehow.

However, if this is reversed, the large lateral pressure applied to the latch bolt 2 will now be applied to the dead bolt 1, so that the key or the thumb turn 4 cannot operate the dead bolt, and the unlocking is performed. It will be impossible.

[0010]

In order to solve the above-mentioned inconvenience, the present applicant has proposed a new anti-seismic lock in Japanese Patent Publication No. 2-16434. In this new anti-shock lock, the dead bolt and the latch bolt are simultaneously driven in the unlocking direction by the handle at the time of unlocking.

However, since the anti-seismic lock operates the handle in order to retract the deadbolt even in a normal use state, the locking / unlocking operation is different from that of a normal lock, and an unfamiliar lock may be confused. There is room for improvement.

The present invention is an improvement of the anti-seismic lock proposed by the present applicant. The locking and unlocking operation is the same as that of a conventional lock, but the latch bolt is retracted before the emergency dead bolt in the event of an earthquake or the like. It is an object of the present invention to provide an anti-seismic lock that can completely prevent the lock from occurring and that has improved safety as a lock.

[0013]

In order to achieve the above object, the present invention provides a deadbolt which is guided so as to be able to enter and exit from a front plate in response to a locking / unlocking operation, and a rotatable support in a lock box. And a dead cam that is disposed so as to be able to engage with the dead bolt, is rotated by the inner cylinder or the thumb turn of the cylinder lock, and controls the entrance and exit of the dead bolt, and is guided to be movable substantially in parallel with the dead bolt, A latch bolt constantly urged forward in the direction protruding from the front plate, and an inner end of the urged latch bolt is engaged from the front side of the front plate, and interlocked with this when operating the door operating member. And a retractor that drives the latch bolt in a direction to retract the latch bolt. The rear end with rotatably bears,
The front end is urged in a direction to be engaged with the locking portion formed on the dead bolt from the rear. On the other hand, at the initial stage of the rotation of the dead cam in the unlocking direction, the engagement between the dead bolt and the locking bar is interlocked with this. A release member for releasing the engagement is provided. On the other hand, the lock member extends substantially vertically in the lock box so as to intersect with the latch bolt, and the base end opposite to the dead bolt with respect to the latch bolt is rotatably supported. A regulating member whose end is engaged with a dead bolt is provided so that when locking the dead bolt protruding from the front plate, the free end of the regulating member is close to the latch head of the latch bolt and interferes with its movement path. It is characterized by the following.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 6 denotes a lock box, and the deadbolt 1 is disposed in the lock box 6, for example, above.

The dead bolt 1 has an opening formed in the front plate 7 through which the dead bolt enters and exits, an elongated hole 1 a opened along the length direction of the dead bolt 1, and a lock box 6.
A guide device, such as a set of guide pins 8 implanted on the inner surface of the vehicle, has a front-rear direction perpendicular to the front plate 7, ie, FIG.
Is guided so as to be movable left and right.

Behind the dead bolt 1, a dead cam 9 having a well-known configuration in the lock device is provided.

The dead cam 9 is rotatably supported by a side plate of the lock box 6, and is provided inside a cylinder lock via a tail piece (not shown) inserted into a clutch hole 9a opened at the center thereof. It is connected to the cylinder and to the thumb turn on the indoor side, respectively.

An operating arm 9b formed integrally with the dead cam 9 extends in the radial direction of the dead cam, and has a leading end formed on a driven notch 11 formed on the side surface of the rear end of the dead bolt 1.
Has been engaged in. Since such a configuration is well known, a more detailed description is omitted.

In the lock box 6 below the dead bolt 1, a latch bolt 2 extends substantially parallel to the dead bolt 1.

The latch bolt 2 is fixed to a square hole through which the latch head 2a opened in the front plate 7 enters and exits, and inside the lock box, and is slidably fitted on the latch bolt shaft 2b. A guide device 12 is movably guided in the left-right direction in FIG.

The latch bolt 2 projects out of the front plate 7 by the elastic force of the latch bolt spring 13 as a compression coil spring elastically mounted between the rear end of the latch bolt 2 and the back plate of the lock box. Is biased forward.

A retractor 14 is rotatably supported in the lock box below the rear end of the latch bolt 2.

A square shaft of a handle is fitted into the retractor 14, and the handle is rotated against a return spring 15 attached to the retractor 14.

The configuration described above is conventionally known. The main part of the present invention will be described.

In the vicinity of the dead bolt 1 described above, a locking bar 16 extending substantially in parallel with the dead bolt 1 is provided.
The rear end is rotatably supported on a side plate of the lock box 6 by a pivot 17, and the front end is selectively engaged with a locking portion 1 b formed at a lower rear portion of the dead bolt 1 from behind.

The front end of the locking bar 16 is biased by a torsion spring or other engaging spring 18 in a direction approaching the locking portion 1b of the dead bolt 1.

Reference numeral 19 denotes a release member provided to release the engagement between the dead bolt 1 and the locking bar 16 in conjunction with the dead cam 9.
In the initial stage of the rotation in the unlocking direction, the locking bar 16 engaged with the locking portion 1b of the deadbolt 1 is swung downward and counterclockwise in FIG. Release.

The release member 19 in the illustrated example has one end pivotally connected to the operating arm 9b of the dead cam 9 by a pin 20 and the other end fixed to the side plate of the lock box 6 in a U-shaped receiving plate 2.
It is movably inserted into one of the fitting holes.

Reference numeral 19a denotes a pushing piece integrally extending obliquely downward from the middle of the release member 19,
Is pressed against the locking bar 16 when unlocking.

A compression spring 22 is fitted to the other end of the body of the release member 19, and both ends of the compression spring 22 are sandwiched between the base of the pressing piece 19 a and the receiving plate 21.

The main body of the release member 19, the compression spring 22 and the receiving plate 21 constitute a conceivable spring device, and the conceived spring devices 19, 22, and 21 are located in an intermediate region of the rotation angle range of the dead cam 9. (Dead center).

Further, a regulating member 23 extending substantially vertically in the lock box 6 so as to intersect with the latch bolt 2 has a pivot 24 at a base end opposite to the dead bolt 1 with respect to the latch bolt 2. The dead bolt 1 is rotatably supported, and its free end (tip) is engaged with the dead bolt 1 by an engagement hole 1c provided at a lower portion of the dead bolt 1.

When the dead bolt 1 protrudes from the front plate 7 when the dead bolt 1 is locked, the regulating member 23
The free end of the latch head 2 in the latch bolt 2
a to selectively approach the rear end or the like and interfere with the movement trajectory of the latch head 2a.

The anti-seismic lock constructed as described above according to one embodiment of the present invention has a dead bolt 1 when locked as shown in FIG.
Is prevented from being retracted to the retracted position by the dead cam 9 and the locking bar 16.
The restricting member 23 occupying the front position interfering with the movement trajectory of the latch head 2a prevents the retracting position by the rotation of the handle from being retracted.

In this locked state, even when the latch head 2 is retracted by turning the handle (door operating member), the latch head 2a is restrained at the projecting position by the regulating member 23. Disabling itself,
Latch bolt 2 cannot be retracted.

Therefore, it is possible to avoid a situation in which the latch bolt 2 may be retracted before the dead bolt 1 is retracted in an emergency such as an earthquake.

When unlocking the anti-quake lock in the locked state, the dead cam 9 is rotated counterclockwise, for example, 90 ° in FIG. 1 by a key or a thumb turn.

At that time, as shown in FIG. 2, the dead cam 9 releases the engagement between the dead bolt 1 and the locking bar 16 by the release member 19 interlocked with the dead cam 9 in the initial stage of rotation, as shown in FIG. The dead bolt 1 is retracted to the retracted position by the operating arm 9b engaged in the driven notch 11 (see FIG. 3).

In addition, when the dead bolt 1 is retracted, the free end swings the regulating member 23 engaged with the dead bolt 1 clockwise in FIG. 2 or FIG. The restraint in the protruding state of the head 2a is released.

Therefore, in the unlocked state shown in FIG. 3, the latch bolt 2 can be freely retracted by operating the handle.

In order to lock the anti-seismic lock in the unlocked state shown in FIG. 3, the dead cam 9 may be turned clockwise by 90 ° by a key or a thumb turn, and each member is operated by the operation shown in FIG. It will be occupied and locked.

[0042]

As is apparent from the above description, in the anti-seismic lock of the present invention, the deadbolt is operated by the double key or the thumb turn without using the handle. There is no change.

Also, since the latch bolt cannot be retracted until after the dead bolt is retracted, there is no danger that the latch bolt will be retracted prior to the dead bolt which is in an emergency projecting state such as an earthquake. Can be eliminated.

Furthermore, since the dead bolt is locked by two members of the dead cam and the locking bar at the time of locking, various effects such as improvement in safety against breaking (illegal unlocking) can be achieved. Play.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing an embodiment of an anti-shock lock according to the present invention in a locked state.

FIG. 2 is a partial longitudinal side view of the unlocking operation, which is shown in a middle stage.

FIG. 3 is a partial longitudinal side view of the unlocked state.

FIG. 4 is a front view showing a general lock device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dead bolt 1b Locking part 2 Latch bolt 2a Latch head 6 Lock box 9 Dead cam 14 Retractor 16 Locking bar 19 Release member 23 Restriction member

Claims (1)

[Claims] A dead bolt guided so as to be able to enter and exit from a front plate in response to a locking and unlocking operation; and a dead bolt rotatably supported in a lock box and arranged to be able to engage with the dead bolt. A dead cam that is rotated by the inner cylinder or the thumb turn of the cylinder lock to control the entrance and exit of the dead bolt, and a latch bolt that is guided to be movable substantially parallel to the dead bolt and is constantly urged forward in a direction protruding from the front plate. And a retractor which engages with the inner end of the biased latch bolt from the front side of the front plate, and which is driven in a direction in which the latch bolt is retracted in conjunction with the door operating member when the door operating member is operated. , A locking bar extending substantially parallel to the deadbolt is provided near the deadbolt, and the rear end is rotatably supported, and the front end is fixed to the deadbolt. A release member that urges the formed locking portion in a direction to engage from behind, and releases the engagement between the dead bolt and the locking bar in conjunction with the initial rotation of the dead cam in the unlocking direction. On the other hand, the lock bolt extends substantially vertically in the lock box so as to intersect with the latch bolt, the base end of the latch bolt opposite to the dead bolt is rotatably supported, and the free end is fixed to the dead bolt. An engaging regulating member is provided so that the free end of the regulating member is close to the latch head of the latch bolt and interferes with the movement trajectory when the dead bolt projects from the front plate when locking. Anti-shock lock.