JPH11131882A - Locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely lock with a simple structure by providing permanent magnets on a trigger body engaged with and disengaged from the ratchet tooth train of a dead bolt and a door frame so that the same magnetic pole is opposed, and releasing the trigger body by the repulsive force when a door is closed. SOLUTION: A ratchet tooth train 10 is provided on the lower end of dead bolt 1, and a trigger body 13 having a claw piece 11 engaged with and disengaged from the ratchet tooth and energized body a trigger spring 16 is fixed to the side plate of a lock box 2 in such a manner as to be rockable. A permanent magnet 15 is mounted on the trigger body 13, and a second permanent magnet 18 is mounted on a door frame side so that the same magnetic pole is opposed. In the door opened state, a retractor 19 retreats the dead bolt 1, the claw piece 11 is engaged with the ratchet tooth train 10, and the dead bolt 1 is held in the recessed position. When the door is closed, the trigger body 14 is rocked by the repulsive force of the first and second permanent magnets 15, 18, the engagement of the claw piece 11 with the ratchet tooth train 10 is released, the dead bolt 1 is automatically protruded, and a strike 17 at the tip is engaged with the engaging hole 20 of the door so that the door can be surely locked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a door locking device. More specifically, the present invention relates to a novel locking device that can securely lock a door to a door frame when the door is closed.

[0002]

2. Description of the Related Art In an automatic locking device, when a door is closed,
When an inconsistency occurs between the deadbolt and the strike due to the degree of door installation or a malfunction of the door closer, the deadbolt having a guiding slope at the tip may remain on the front plate of the strike. In this case, of course, locking is impossible, so that if the lock is not confirmed, the user may go out of the house without being locked.

[0003] In order to solve the above-mentioned problems, the present applicants have developed a locking device in which automatic locking is reliably achieved even if there are some problems in door construction and door closer operation. JP-A-3-194731 (Japanese Unexamined Patent Publication No. 5-22287)
No. 2) and Japanese Patent Application No. 4-341495 (Japanese Unexamined Patent Application Publication No.
No. 67152).

[0004] The former locking device is achieved by utilizing the repulsive force of two permanent magnets by the same magnetic pole, and the latter locking device utilizes the attraction force of two permanent magnets by different magnetic poles. Things.

[0005]

SUMMARY OF THE INVENTION A locking device according to the present invention has a mechanism different from that of the above-mentioned conventional locking device so that reliable automatic locking can be achieved when the door is closed. It has been proposed for the purpose of simplifying the overall mechanism by removing the control gear having a complicated shape and the locking lever formed integrally therewith from the locking device.

[0006]

In order to achieve the above object, a locking device according to the present invention is guided in a lock box attached to a door so as to be movable in a front-rear direction perpendicular to a front plate and forwardly. A dead bolt that is urged toward and retractable with respect to the front plate, a ratchet tooth row formed along the front-rear direction in the dead bolt, and a central portion is swingably supported near the front plate in the lock box, One end is biased in a direction approaching the front plate or away from the front plate, and the other end is provided with a trigger member formed with a claw that is engaged and disengaged from the ratchet teeth, and is attached to one end of the trigger member. A first permanent magnet, a second permanent magnet attached to a portion of the door frame where the first permanent magnet is aligned when the door is closed, and facing the first permanent magnet with the same magnetic pole or a different magnetic pole; smell One end pivotally linked to the external operating member of the door causes supported and characterized in that the other end and a retractor to face the engageable from the front to the dead bolt.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to two embodiments shown in the drawings. 1 to 5 show a first embodiment, and FIG. 6 shows a second embodiment.

In the first embodiment shown in FIGS.
Shows the entire dead bolt, and the dead bolt 1 is guided in the lock box 2 so as to be movable in the front-rear direction perpendicular to the front plate 3, and is moved between the immersion position (storage position) and the projecting position. It can be displaced.

As shown in FIGS. 3 and 4, the dead bolt 1 is, for example, a dead block 5 having a guide roller 8 at a tip end and having a rectangular cross section and fixed to the dead block 5 with tacks or screws. The board 4 and the front end are fitted into fitting holes opened in the rear end face of the dead block 5, and the rear end is constituted by a guide bar 6 crimped to a bent portion at the rear end of the dead board 4.

In the illustrated example, the dead bolt 1
Are movably guided by a rectangular through hole opened in the front plate 3 and a U-shaped guide piece 9 fixedly mounted on the side plate of the lock box 2 and slidably fitted with the guide rod 6. It is to be done.

Reference numeral 7 denotes a dead spring, such as a compression coil spring, fitted on the guide rod 6 between the dead block 5 and the guide piece 9. The dead spring 1 causes the dead bolt 1 to move forward. That is, the dead bolt 1 is biased in a direction in which the tip of the dead bolt 1 projects from the front plate 3.

The lower side of the dead board 4 of the dead bolt 1 is partially extended downward, and a lower end edge of an escape window 4a for a trigger body 14 to be described later, which is opened at the extended portion, is provided. , Deadbolt 1 (Deadboard 4)
A ratchet tooth row 10 including at least one tooth is formed linearly and upward along the front-rear direction.

On the other hand, at the lower corner near the front plate 3 in the lock box 2, there is provided a trigger body 14 which is, for example, a lever whose entire side surface is in a U-shape.

A central portion of the trigger body 14 is swingably supported on a side plate of the lock box 2 with a horizontal axis, and a first permanent magnet 15 is provided at one end which is an outer end located on the front plate 3 side. It is attached.

The trigger body 14 is biased by a trigger spring 16 such as a torsion spring in a direction in which one end provided with the first permanent magnet 15 approaches the front plate 3, that is, clockwise in FIG. .

The other end, which is the inner end of the trigger body 14, has a claw piece 11 integrally formed by, for example, bending.
The pawl 11 is fitted in the escape window 4a, and the ratchet tooth row 1 of the dead bolt 1 is provided.
0 is selectively engaged.

In the open state of FIG. 1, the dead bolt 1 occupying the retracted position (storage position) is urged in the protruding direction by the dead spring 7, but the dead bolt 1 The trigger body 14 urged clockwise by the trigger spring 16 moves the claw piece 11 at the other end.
, The dead bolt 1 is stably locked (stopped) at its retracted position.

In the illustrated example, when the door is opened (see FIG. 1), one end of the trigger body 14 is stopped by abutting the inner surface of the front plate 3 via the first permanent magnet 15. When the door is closed (see FIG. 2), the other end is stopped so as to be in sliding contact with the upper edge of the rectangular escape window 4a of the dead board 4. As the stopper means for regulating the range,
It goes without saying that other means such as a stopper pin implanted in the lock box 2 may be used.

On the other hand, as shown in FIG. 2, when the strike 17 mounted on the door frame side is closed, the first permanent magnet 1 is closed.
The second permanent magnet 18 is attached to a portion that matches the first permanent magnet 5 so as to face the first permanent magnet 15 with the same magnetic pole.

Therefore, when the door is closed, the first permanent magnet 15 and the second permanent magnet 18 face each other with the same magnetic pole and face each other. Swings counterclockwise in FIG.

Then, the engagement between the pawl 11 of the trigger body 14 and the ratchet teeth 10 is released, so that the dead bolt 1 is automatically protruded by the urging force of the dead spring 7, and its tip is engaged with the strike 17. It is engaged in the hole 20 (FIG. 2)
reference).

The front plate 3 with which the first and second permanent magnets 15 and 18 come into contact with or approach each other is made of a non-magnetic material so that the lines of magnetic force are not interrupted. Other members in the vicinity can be made of a non-magnetic material in order to avoid dispersion of lines of magnetic force.

Further, a dead bolt 1 is provided in the lock box 2.
An elongated plate-shaped retractor 19 is mounted so as to overlap with the rear end portion. This retractor 1
One end (the lower end in FIG. 1) of the lock 9 is rotatably supported on the side plate of the lock box 2.

A deformed hole is opened at the center of one end of the retractor 19, and the retractor 19 is provided with an external operating member (not shown) such as a knob on the inner and outer surfaces of the door through an operating shaft inserted through the deformed hole. ).

The other end (upper free end) of the retractor 19 projects above the dead bolt 1 so as to pass through between the dead bolt 1 and the side plate of the lock box 2. The front end of the bolt 1 is engaged with the bent portion at the rear end thereof (see FIG. 2).

The retractor 19 is urged counterclockwise in FIG. 1 by a return spring 21. As long as no external force is applied to the retractor 19 from an external operating member, the retractor 19 projects from one end thereof. Locking piece 22 is locked in lock box 2
1 or 2 is kept at the angular position shown in FIG.

The function of the retractor 19 is that the dead bolt 1 at the projecting position (see FIG. 2) engaged with the engaging hole 20 of the strike 17 is retracted (see FIG. 2) by, for example, clockwise operation of the external operating member. 1).

That is, as shown in FIG. 2, the door is closed and the dead bolt 1 is automatically inserted into the engagement hole 20 of the strike 17.
The bent portion at the rear end of the dead bolt 1 is close to the other end of the retractor 19 from behind.

In such a state, when the retractor 19 is swung clockwise in FIG. 2 by turning an external operation member such as a knob, the other end of the retractor 19 is bent at the rear end of the dead bolt 1. To push the dead bolt 1 back to the immersion position.

On the other hand, in the vicinity of the upper side of the dead bolt 1 in the lock box 2, there is provided an elongated plate-like locking bar 24 extending substantially in the front-rear direction and swingably supported at the center.

The locking bar 24 is for locking the dead bolt 1 at the projecting position while fixing it in a fixed state. The locking bar 24 and the locking mechanism 25 for restraining the locking bar 24 are conventionally known. Here, the description is simplified.

The front end of the locking bar 24 is, for example, joined by spot welding or the like of two figures to increase the rigidity, and the rear end is bent, for example, into a U-shaped cross section. A locking groove 26 is formed in the bent portion.

A locking lever 27 having an inverted side shape is provided on the rear part of the locking bar 24 in the lock box 2.
The locking lever 27 is swingably supported on the side plate of the lock box 2 at the center thereof.

The upper end of the locking lever 27 is linked to a cylinder lock via a so-called dharma assembly 28, and the portion slightly below the upper end of the locking lever 27 is linked to the output shaft of a solenoid 29 as an electromagnetic actuator of an electric lock. It is.

Further, the lower free end of the locking lever 27 is
Locking pin 3 planted at the rear end of locking bar 24
1 is engaged from below.

Then, after the door is closed and the dead bolt 1 automatically projects to engage the strike 17, the electromagnetic actuator 29 of the electric lock responds to the locking signal,
When the output shaft of the electromagnetic actuator 29 (solenoid) projects rightward from the position shown in FIG.
7 swings clockwise, and its lower free end pushes up the locking pin 31.

As a result, the locking bar 24 swings counterclockwise, and its front end is opposed to the stepped portion 32 formed at the front of the dead bolt 1 as shown by a chain line in FIG. . In this state, the dead bolt 1 cannot be retracted, and thus the locking device is locked.

In this locked state, as shown in FIG. 2, the retractor pin 33 implanted at the other end of the retractor 19 is engaged with the locking groove 2 of the locking bar 24.
6, the retractor 19 cannot be swung.

Such a state where the retractor 19 cannot be swung also occurs when the locking lever 27 is swung clockwise through the dharma assembly 28 by a key inserted into the cylinder lock.

The locking bar 24 in the illustrated embodiment is constantly urged clockwise by a torsion coil spring. When the locking lever 27 swings in the unlocking direction, ie, counterclockwise, the urging force of the spring is applied. Lock lever 2 by
7, but the locking lever 27
It is needless to say that the above-mentioned torsion coil spring is not necessary if a long hole or a long groove is formed in the free end portion below the lower end and the locking hole is engaged with the locking hole.

Next, the operation of the locking device according to the first embodiment of the present invention will be described. In the opened state of FIG. 1, the dead bolt 1 occupying the retracted position in the lock box 2 is urged in the protruding direction by the dead spring 7. 14 is pressed so as to be close to each other by the urging force of the trigger spring 16, and the ratchet 11 is
0, the dead bolt 1 is stably locked (stopped) at its retracted position.

When the door is closed, the deadbolt 1 located at the immersion position (storage position) in the lock box 2 does not contact the strike 17 on the door frame at all, so that the door can be built or the door closer can be closed. The door can be completely closed, even if there is some malfunction in operation.

When the door is completely closed, as shown in FIG. 2, the first permanent magnet 15 of the trigger body 14 and the second permanent magnet 15 on the door frame side
Since the permanent magnet 18 and the permanent magnet 18 face each other at the same magnetic pole, a magnetic repulsive force acts on the first and second permanent magnets 15 and 18, and the movable magnet is movable with respect to the second permanent magnet 18 fixed on the door frame side. The first permanent magnet 15 attached to one end of the trigger body 14 is to be separated.

Therefore, the trigger body 14 is connected to the trigger spring 1.
6 swings counterclockwise against the biasing force of 6
Since the engagement between the ratchet teeth 1 and the ratchet teeth 10 is released, the dead bolt 1 is automatically projected by the urging force of the dead spring 7, and its tip is engaged with the engagement hole 20 of the strike 17.

In order to open the door, first, the external operating member is operated to swing the retractor 19 clockwise, for example, and the dead bolt 1 is pressed against the urging force of the dead spring 7 at the other end. Push backwards. Here, Dead Bolt 1
Is retracted to the immersion position, and its tip is strike 17
The door can be opened because it is removed from the engagement hole 20.

Therefore, if the door is opened with the external operation member being held, the first permanent magnet 15 of the trigger body 14 is separated from the second permanent magnet 18 on the door frame side. The magnetic repulsive force of the same magnetic pole acting between 15 and 18 disappears, and the trigger body 14 tilts clockwise in FIG. 2 by the urging force of the trigger spring 16.

The claw piece 11 at the other end of the trigger body 14
Engages with the ratchet teeth 10 of the dead bolt 1 pulled into the lock box 2 and locks (stops) the dead bolt 1 which is about to protrude by the urging force of the dead spring 7 (see FIG. 1). In this state, the deadbolt 1 no longer protrudes even if the hand is released from an external operation member such as a knob.

If the dead bolt 1 is left behind when the door is opened, the retractor 19 can be operated clockwise again in FIG. In the combined state, the ratchet teeth 10 allowed to move rearward can be moved further rearward, so that the dead bolt 1 can be retracted to the normal immersion position (the position in FIG. 1).

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment of FIG.
The members or portions indicated by the same reference numerals as those in the first embodiment of FIG. 5 represent members or portions exhibiting the same effect, and therefore, the second embodiment is different from the first embodiment mainly. The following is a description of the parts that are described.

The ratchet tooth row 10 in this example is formed linearly and downward at the lower end edge of the downwardly extending portion of the dead board 4, and the ratchet tooth row 1 is formed.
For 0, the claw piece 11 at the other end of the trigger body 14 is engaged from below. Therefore, the dead board 4 does not require the escape window (4a) provided in the first embodiment.

Then, the trigger body 14 is biased by a trigger spring 16 such as a torsion spring in a direction in which one end provided with the first permanent magnet 15 moves away from the front plate 3, that is, counterclockwise in FIG. is there.

When the trigger body 14 is opened (see FIG. 6), one end of the trigger body 14 is stopped by being brought into contact with a stopper pin 14a planted on the side plate of the lock box 2 from the front.
When the door is closed (not shown), one end is brought into contact with the inner surface of the front plate 3 via the first permanent magnet 15 and stopped. However, the stopper means for restricting the swing range of the trigger body 14 is not limited to the illustrated example.

Further, in the second embodiment, a portion of the strike 17 mounted on the door frame side, which is aligned with the first permanent magnet 15 when the door is closed, is opposed to the first permanent magnet 15 with a different magnetic pole. The second permanent magnet 18 is mounted.

Therefore, when the door is closed, the first permanent magnet 15 and the second permanent magnet 18 face each other with the same magnetic pole and face each other, so that the first permanent magnet 15 exerts a magnetic attraction force from the second permanent magnet 18. Then, the trigger body 14 is swung clockwise in FIG.

At this time, the engagement between the pawl 11 of the trigger body 14 and the ratchet tooth row 10 is released, so that the dead bolt 1 is automatically projected by the urging force of the dead spring 7, and the tip of the dead bolt 1 is engaged with the strike 17. It is engaged in the inlet 20.

The operation of the locking device according to the second embodiment as a whole is similar to that of the locking device according to the first embodiment described above, and therefore the description thereof is omitted here.

In both embodiments, the trigger body 14
The line connecting the last point at which the claw 11 of the ratchet 11 is disengaged from the ratchet teeth 10 and the rotation center point of the trigger body 14 is substantially horizontal, and the vertical line of each tooth of the ratchet teeth 10 is A right angle with the appropriate engagement line.

The engagement configuration between the claw 11 of the trigger body 14 and each tooth of the ratchet tooth row 10 as described above is such that when the trigger body 14 rotates, the last engagement point of the claw 11 is monotonously ratcheted. Since it moves in a direction away from the tooth row, the locking (stopping) action of the dead bolt 1 integrated with the ratchet tooth row 10 is stabilized, and the dead bolt 1 is improved by cutting when the engagement is released. This is effective in smoothing the protruding action.

[0059]

According to the locking device of the present invention described above, not only can a secure automatic locking be achieved when the door is closed, but also the number of parts can be reduced and the overall mechanism can be simplified.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal side view showing a first embodiment of a locking device according to the present invention in an open state.

FIG. 2 is a partial longitudinal side view showing the locking device of the first embodiment in a closed state.

FIG. 3 is a plan view of the dead bolt removed from the locking device of the first embodiment.

FIG. 4 is a side view thereof.

FIG. 5 is a front view of a strike on a door frame side which forms a part of the locking device of the first embodiment.

FIG. 6 is a partial vertical sectional side view showing a second embodiment of the locking device according to the present invention in an open state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dead bolt 2 Lock box 3 Front plate 7 Dead spring 10 Ratchet teeth 11 Claw piece 14 Trigger body 15 First permanent magnet 17 Strike 18 Second permanent magnet 19 Retractor

Claims (1)

[Claims] 1. A deadbolt guided in a lock box attached to a door so as to be movable in a front-rear direction perpendicular to a front plate and urged forward to be able to protrude and retract with respect to the front plate. A ratchet tooth row formed along the direction, a central portion is swingably supported near the front plate in the lock box, and one end is urged in a direction approaching the front plate or away from the front plate. A trigger body formed at the other end thereof with a squash engaged with the ratchet teeth, a first permanent magnet mounted on one end of the trigger body, and a portion of the door frame where the first permanent magnet is aligned when the door is closed. A second permanent magnet mounted and opposed to the first permanent magnet at the same magnetic pole or a different magnetic pole, one end of which is swingably supported in the lock box and connected to an external operating member of the door; A retractor having a side facing the deadbolt so as to be engageable from the front.