JP2018204322A - Automatic locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic locking device capable of preventing a dead bolt from protruding to a maximum protruding amount and becoming a locked state in a door open state. SOLUTION: A dead bolt 20 has a locked state in which it protrudes to a maximum protruding amount Pb and a latched state in which it protrudes to an intermediate protruding amount, and when the door is closed, a trigger operating member 31 inside a front plate 12 operates to engage a latch. In the automatic locking device provided with the trigger mechanism 30 that acts on the stop member 35 to release the latch state, when the door is closed, the first permanent magnet M1 integrally provided with the trigger operating member 31 is inside the strike plate 11. The trigger actuating member 31 is actuated by receiving magnetic forces acting on each other corresponding to the provided second permanent magnet M2. [Selection diagram] FIG. 7

Description

  The present invention relates to an automatic locking device that automatically locks when a door is closed.

  In the automatic locking device, when the door closes and closes the door frame, the dead bolt that protrudes and protrudes from the door-side surface on the door side is inserted through the lock port opened on the strike plate on the door frame side. And a locking device that cannot be automatically unlocked by retracting the deadbolt by using knobs or lever handles on both the outer and inner and outer sides.

  In such an automatic locking device, the dead bolt protrudes from the door front surface in a two-stage protruding state with a maximum protruding amount and an intermediate protruding amount, and the lock is controlled so that the maximum protruding amount protrudes and does not retract when the door is closed. There is a locking device that has a state and a latching state that protrudes when the door is opened, protrudes by an intermediate protrusion amount, protrudes beyond the intermediate protrusion amount, and can be retracted freely (see, for example, Patent Document 1).

Japanese Patent Publication No.40-28879

The automatic locking device in which the dead bolt has a two-stage protruding state of a locked state and a latched state has a trigger mechanism that releases the latched state when the door is closed. There is a trigger that protrudes freely (trigger retracting member), and when the door is closed, the trigger retreats to actuate the actuating member, and the actuating member regulates further projections with the dead bolt latched in the middle projecting amount. The latched state is released by acting on the lock position inhibiting member (latch locking member).
Both the dead bolt and the trigger retracting member have an inclined surface at the front end, and retract when the inclined surface contacts the strike plate on the door frame when the door is closed.

  That is, when the door is opened, the dead bolt protrudes from the door front surface by an intermediate protrusion amount and is in a latched state, and the trigger retracting member protrudes from the door front surface, and the door closes the door frame from this door open state. When the door is closed, both the dead bolt and the trigger retracting member come back together with the inclined surfaces coming into contact with the strike plate on the doorway frame side.

  The unlocking position restraining member releases the dead bolt advance restriction through the actuating member due to the retraction of the trigger retracting member, so that the dead bolt that was retreating in contact with the strike plate matched the locking port opened in the strike plate. When it protrudes and is inserted through the locking port and protrudes to the maximum protruding amount, the locking piece (lock locking member) is locked to the dead bolt, and the backward movement is restricted to be in the locked state.

  To unlock and unlock, insert the key into the lock cylinder and unlock it, or rotate the thumb turn inside the door and unlock the knob or lever handle inside the door There is a method of unlocking by operating.

  However, in recent years, in order to manage the entrance and exit of people, when the door is closed, the locked state cannot be released even by operating the knob inside the door, and the emergency cover is put on the thumb turn and the locked state is released except by key operation There is an increasing number of automatic locking devices configured to specifications that have no way to do so.

  In the case of an automatic locking device having such a specification, as disclosed in Patent Document 1, if the trigger protruding / extracting member has a structure that protrudes and retracts freely from the door end surface, the dead bolt protrudes and latches by an intermediate protruding amount. If the trigger retracting member is pushed in together with the dead bolt in the open state where the trigger retracting member is in the open state and the trigger retracting member is pushed together with the dead bolt, the latch state is released and the dead bolt reaches the maximum protruding amount. Protruding and locked by the locking piece.

When the deadbolt protrudes to the maximum protruding amount in the open state and is locked, there is no way to release the locked state other than releasing the locked state with the key.If the key is not at hand, the door is open. In this case, the dead bolt protrudes to the maximum protruding amount for a long time, and the protruding dead bolt may be damaged by colliding with the door frame.
In addition, in the case where the emergency cover is put on the thumb turn, there is a method of operating the thumb turn by breaking the emergency cover, but the post-processing is troublesome.

  The present invention has been made in view of the above points, and an object of the present invention is an automatic locking device that can prevent a dead bolt from protruding to a maximum protruding amount and being locked in an open state. It is in the point to offer.

In order to achieve the above object, an automatic locking device according to the present invention comprises:
It is urged by the bolt urging means to move forward and protrude forward from the front plate along the door edge to the maximum protruding amount, and retracts backward against the bolt urging means to the inside of the front plate. A dead bolt having an inclined surface at the front end to be immersed;
A lock engaging member that engages with the dead bolt projecting to the maximum projecting amount and regulates the backward movement of the dead bolt so as to be in a locked state;
A latch locking member that restricts the forward movement of the dead bolt protruding to an intermediate protruding amount smaller than the maximum protruding amount to be in a latched state;
A trigger mechanism in which the trigger actuating member inside the front plate operates against the biasing force of the trigger biasing means when the door is closed and acts on the latch locking member to release the latched state. In the locking device,
The trigger mechanism is
A first permanent magnet provided integrally with the trigger actuating member is provided to face the inner surface of the front plate;
A second permanent magnet is provided inside the strike plate on the door frame side having a locking port through which the dead bolt protruding from the front plate is inserted when the door is closed;
When the door is closed, the first permanent magnet receives a magnetic force acting on each other corresponding to the second permanent magnet and operates the trigger operating member against the biasing force of the trigger biasing means. To do.

  According to this configuration, when the door is closed, the first permanent magnets facing the inner surface of the front plate along the door tips of the doors act on the second permanent magnets inside the strike plate on the door frame side. The trigger actuating member operates against the urging force of the trigger urging means in response to the magnetic force to be applied, so the trigger actuating member acts on the latch locking member to release the latched state, and the dead bolt is placed on the door frame side. When the strike plate matches the lock opening of the strike plate, the dead bolt penetrates the lock opening and protrudes to the maximum protruding amount to be locked.

  When opening the door in the latched state where the dead bolt protrudes by an intermediate protrusion amount, the first permanent magnet on the door end side of the door does not correspond to the second permanent magnet inside the strike plate on the door frame side, and the magnetic force works. The trigger actuating member is not actuated, and the surface of the front plate of the door is flat except for the dead bolt projecting, and the trigger retracting member etc. is not projecting. The trigger actuating member is not actuated. Therefore, the latched state is not released when the door is opened, and it is possible to prevent the dead bolt from projecting to the maximum projecting amount and being locked.

In the above configuration,
The trigger mechanism may generate a repulsive force when the first permanent magnet and the second permanent magnet are opposed to the same magnetic pole when the door is closed.

According to this configuration, when the door is closed, the first permanent magnet and the second permanent magnet cause the same magnetic poles to face each other to generate repulsive force. Therefore, when the door is closed, the first permanent magnet is turned into the second permanent magnet. When the same magnetic poles approach each other and receive a repulsive force, they can move backward together with the trigger actuating member to actuate the latch locking member.
In this trigger mechanism, even when a ferromagnetic material such as iron approaches the front plate and is magnetized by the corresponding first permanent magnet when the door is opened, the first permanent magnet is attracted, but repulsive force is generated. The trigger mechanism is not retracted and the trigger mechanism does not operate accidentally due to the ferromagnetic material, preventing the dead bolt from protruding to the maximum protruding amount and becoming locked. Can do.

In the above configuration,
A lock locking projection and a latch recess are formed side by side on the side surface of the dead bolt on the lock locking member side,
The lock engaging member is rotatably provided, is engaged with the latch recess, is interlocked with the dead bolt, and is engaged with the lock engaging protrusion to be locked. And a latch locking piece portion that is locked to the latch locking member to be in a latched state,
The latch locking member is fixed to the trigger actuating member,
The lock locking member may be urged to rotate by a rotation urging means in a direction in which the latch locking piece is in contact with the latch locking member.

According to this configuration, when the door is closed, the first permanent magnet receives the magnetic force acting on each other corresponding to the second permanent magnet and operates the trigger actuating member together with the latch locking member. The rotation restriction due to the locking with the one part is released, the dead bolt protrudes to the maximum protruding amount with the rotation of the lock locking member, and the lock locking piece of the lock locking member is the lock locking protrusion of the dead bolt To be locked.
When the door is opened, the latch latching piece of the lock latching member comes into contact with the latch latching member fixed to the trigger actuating member and the rotation is restricted, so that the lock latching piece of the lock latching member The dead bolt interlocked via the part is in a latched state in which the intermediate protrusion amount protrudes.

  In the latched state at the time of opening the door, the front plate of the door is flat except for the dead bolt protruding, and the trigger retracting member does not protrude. Thus, the latched state is not released, and it is possible to prevent the dead bolt from protruding to the maximum protruding amount and being locked.

In the above configuration,
A lock latching step portion and a latch projection are formed side by side on the side surface of the dead bolt on the lock latching member side,
The lock engagement member is provided rotatably, and includes a lock engagement collar portion that is engaged with the lock engagement step portion to be locked.
The latch locking member is provided rotatably, and includes a latch locking claw portion that locks to the latch protrusion, and a trigger engagement protrusion that engages and interlocks with the trigger operation member,
At the same time that the lock locking member is rotated and biased by the rotation biasing means in the direction in which the lock locking collar is locked to the lock locking step of the dead bolt, the trigger engagement protrusion The latch locking member may be urged to rotate in the direction of engaging the trigger actuating member.

According to this configuration, when the door is closed, the first permanent magnet receives the magnetic force acting on each other corresponding to the second permanent magnet and operates together with the trigger operating member, and engages the trigger operating member with the trigger engaging protrusion. The interlocking latch locking member rotates and the latch locking claw of the latch locking member releases the dead bolt from the latch projection, so the dead bolt protrudes to the maximum protruding amount and lock locking The lock locking collar portion of the member is locked to the lock locking step portion of the dead bolt, and the locked state is reached.
When the door is opened, the latch locking member rotates together with the trigger actuating member which is moved by the trigger biasing means without being affected by the magnetic force of the second permanent magnet, and the latch locking claw is latched by the dead bolt. The dead bolt protrudes to an intermediate protrusion amount so that it can be locked to the protrusion, and a further forward movement is restricted.

  In the latched state when the door is opened, the surface of the front plate of the door is flat except that the dead bolt protrudes, and the trigger in / out member does not protrude, so the first permanent magnet and the trigger are activated by mistake or mischief. The member is not actuated, so that the latched state is not released, and it is possible to prevent the dead bolt from protruding to the maximum protruding amount and being locked.

  In the present invention, when the door is opened in the latched state in which the dead bolt protrudes by an intermediate protrusion amount, the first permanent magnet on the door end side of the door does not correspond to the second permanent magnet on the inside of the strike plate on the door frame side, The trigger actuating member is not actuated by the magnetic force, and the door front surface of the door is flat and the trigger protruding / extracting member does not protrude. Therefore, the first permanent magnet and the trigger actuating member may be accidentally or mischiefed. Therefore, the latching state is not released when the door is opened, and it is possible to prevent the dead bolt from protruding to the maximum protruding amount and being locked.

It is an external view of a door and a door provided with the automatic locking device concerning a 1st embodiment of the present invention. It is the perspective view which showed the automatic locking device and the strike plate corresponding to each other with a space therebetween. It is sectional drawing which shows the internal structure of the automatic locking device in the latched state where the dead bolt protruded to the intermediate protrusion amount. It is principal part sectional drawing of the automatic locking device shown by FIG. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the state of the door closing start. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the state just before the closing end of a door. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the closed state of a door. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the middle of unlocking by operation of the key inserted in the lock cylinder. It is principal part sectional drawing which shows the internal structure of the automatic locking device after the unlocking by operation of a key. Then, it is principal part sectional drawing which shows the internal structure of the automatic locking device in the closed state which opened the door. It is sectional drawing which shows the internal structure of the automatic locking device when a 2nd stopper member is evacuated in the locked state which the dead bolt protruded to the maximum protrusion amount. It is principal part sectional drawing which shows the internal structure of the automatic locking device after unlocking by rotating a handle hub by operation of a handle lever. It is sectional drawing which shows the internal structure in the latched state where the deadbolt of the automatic locking device which concerns on the 2nd Embodiment of this invention protruded to the intermediate protrusion amount. It is principal part sectional drawing of the automatic locking device shown by FIG. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the state of the door closing start. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the state just before the closing end of a door. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the closed state of a door. It is principal part sectional drawing which shows the internal structure of the automatic locking device in the middle of unlocking by operation of the key inserted in the lock cylinder. It is principal part sectional drawing which shows the internal structure of the automatic locking device after the unlocking by operation of a key. Then, it is principal part sectional drawing which shows the internal structure of the automatic locking device in the closed state which opened the door. It is sectional drawing which shows the internal structure of the automatic locking device when the bending end part of a rotation control member is evacuated in the locked state which the dead bolt protruded to the maximum protrusion amount. It is principal part sectional drawing which shows the internal structure of the automatic locking device after unlocking by rotating a handle hub by operation of a handle lever.

Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
FIG. 1 is an external view of a door 5 and a door 4 provided with an automatic locking device 10 according to an embodiment to which the present invention is applied.

Referring to FIG. 1, a door 4 is formed in a wall 2 of a building 1 which is partitioned by a door frame 3 and opened in a rectangular shape. The door 5 can be opened and closed from the outside by a swing of a door 5.
An automatic locking device 10 is disposed inside the door 5 with the front plate 12 exposed at a predetermined height along the door tip 5 a of the door 5.

A dead bolt 20 protrudes forward from the front plate 12 of the automatic locking device 10, and a lever handle 15 and a lock cylinder 16 are provided on both inner and outer side surfaces of the door 5.
On the other hand, the strike plate 11 is provided opposite to the front plate 12 of the automatic locking device 10 in the vertical frame portion 3a of the door frame 3 facing the door 5a of the door 5 with the door 4 closed.

FIG. 2 is a perspective view showing the automatic locking device 10 and the strike plate 11 with a space therebetween.
The automatic locking device 10 is provided with a flat rectangular parallelepiped lock box 13 inside a front plate 12 fitted along the surface of the door 5a.

A dead bolt 20 protrudes forward from a rectangular opening 12a of the front plate 12.
In the door 5, the direction in which the dead bolt 20 protrudes from the front plate 12 is defined as the front, and the direction in which the dead bolt 20 is retracted is defined as the rear.
The dead bolt 20 has a long rectangular parallelepiped shape in the front and rear, and has an inclined surface 20s at the protruding end (front end).

Further, the dead bolt 20 has a protrusion 20b protruding at a predetermined position in the front and rear of the lower side surface, and the dead bolt 20 protrudes until the protrusion 20b contacts the inner surface of the front plate 12.
On the other hand, the strike plate 11 facing the front plate 12 is formed with a rectangular locking port 11a into which the dead bolt 20 protruding from the front plate 12 of the door 5 is inserted.

The lock box 13 is provided with a cylinder cam 17 of the lock cylinder 16 on the upper rear side, and a handle hub 18 into which the angular shaft of the lever handle 15 is fitted on the lower rear side.
A first permanent magnet M1 is provided inside the lock box 13 and above the dead bolt 20 so as to face the inner surface of the front plate 12, as will be described later. The second permanent magnet M2 is fixed.

When the door is closed, the first permanent magnet M1 and the second permanent magnet M2 are positioned so as to face each other, and are provided so that the sides facing each other have the same magnetic pole, and a repulsive force acts on each other to move the first permanent magnet M1. Is configured.
The strike plate 11 to which the front plate 12 and the second permanent magnet M2 adjacent to the first permanent magnet M1 are fixed is made of a non-magnetic material in order to avoid the dispersion of the lines of magnetic force.

In the automatic locking device 10, only the dead bolt 20 protrudes from the front plate 12, and the flat surface of the front plate 12 other than the dead bolt 20 is only exposed to the outside.
As will be described later, the dead bolt 20 is projected forward from the rectangular opening 12a of the front plate 12, can be retracted and retracted, and even when projecting, the dead bolt 20 projects to the maximum projecting amount when the door is closed, It has a two-stage protruding state in a latched state that protrudes to an intermediate protruding amount that is smaller than the maximum protruding amount when the door is opened.

FIG. 3 is a cross-sectional view showing the internal structure of the automatic locking device 10 and shows a latched state in which the dead bolt 20 at the time of opening the door protrudes to an intermediate protrusion amount Pa.
The dead bolt 20 is inserted from behind into a guide spindle 21 projecting forward from the rear wall 13r of the lock box 13, and is supported slidably forward and backward, and is a compression coil spring 22 wound around the guide spindle 21. Is biased forward.

The dead bolt 20 has a long rectangular parallelepiped shape in the front and rear, and a lock engaging projection 20p and a latch recess 20q are formed in the front and back side by side.
The lock locking projection 20p projects in a triangular shape by tapering upward in a side view shown in FIG. 3, and the rear rear slope 20pr is slightly recessed and curved.
The latch recess 20q is recessed in a side view, and is formed rearward of the lock locking projection 20p.

A lock locking member 25 is pivotally supported by a rotation shaft 26 and is rotatably provided above the lock locking projection 20p and the latch recess 20q of the dead bolt 20.
The lock locking member 25 includes a lock locking piece 25a and a latch locking piece 25b that protrude in the radial direction from the rotating shaft 26.

  The lock locking piece 25a of the lock locking member 25 swings back and forth substantially below the rotary shaft 26, and the tip engages with the latch recess 20q of the dead bolt 20, as shown in FIGS. As shown in FIGS. 8 to 10, the dead bolt 20 can be interlocked and the tip can be brought into contact with and locked to the rear inclined surface 20 pr of the lock locking projection 20 p of the dead bolt 20 (FIG. 7). reference).

The latch locking piece 25b of the lock locking member 25 swings up and down substantially in front of the rotation shaft 26, and its tip is bent to form a locking portion 25bb.
A first roller 27 is pivotally supported on the lock engaging member 25 above the rotation shaft 26, and a second roller 28 is pivotally supported behind the lock engagement piece portion 25 a below the rotation shaft 26. .
A lock cylinder 16 is disposed above the rotation shaft 26, and the first roller 27 is positioned so as to be able to swing back and forth between the lock cylinder 16 and the rotation shaft 26. The cam piece 17a of the cam 17 can abut and act.

  One end of the torsion coil spring 24 wound around the rotating shaft 26 is locked from below to the bent locking portion 25bb of the latch locking piece 25b, and the other end of the torsion coil spring 24 is the rotating shaft. The lock locking member 25 is rotated clockwise in a side view shown in FIG. 3 by being locked by a torsion coil spring 24 by being locked from below with a locking pin 29 protruding from the inner surface of the lock box 13 behind 26. Be energized.

Between the lock cylinder 16 and the front plate 12, a guide plate 33 bent in an L shape is attached to the inner surface of the lock box 13.
In the guide plate 33, the front end of the horizontal plate portion 33h is bent upward to constitute a vertical plate portion 33v, the vertical plate portion 33v is located in the vicinity of the front plate 12, and the horizontal plate portion 33h is connected to the lock cylinder 16. It is at a height position between the first rollers 27.

A trigger actuating member 31 is provided so as to be slidable back and forth along the lower surface of the horizontal plate portion 33h of the guide plate 33.
The first permanent magnet M1 is supported on the magnet support plate 32 attached to the trigger actuating member 31.
In the magnet support plate 32, the front end of the horizontal plate portion 32h is bent downward to form a vertical plate portion 32v, and the horizontal plate portion 32h is fixed to the upper surface of the front portion of the trigger actuating member 31, and is placed on the front surface of the vertical plate portion 32v. The first permanent magnet M1 is fixed, and the first permanent magnet M1 is provided integrally with the trigger actuating member 31.
The first permanent magnet M1 is in the vicinity of the front plate 12 so as to face the inner surface of the front plate 12, and can be moved back and forth integrally with the trigger actuating member 31 via the magnet support plate 32.
The trigger mechanism 30 is constituted by the above structure and the second permanent magnet M2.

A rod-like latch locking member 35 having an upper end fixed to the rear portion of the horizontal plate portion 32 h of the magnet support plate 32 is fixed to the trigger operation member 31 and is provided so as to protrude downward from the trigger operation member 31.
Therefore, the trigger actuating member 31 moves back and forth integrally with the latch locking member 35.

A support pin 36 projects from the inner surface at the upper front position inside the lock box 13, and one end of a torsion coil spring 37 wound around the support pin 36 is in contact with the upper wall of the lock box 13 and twists. The other end of the coil spring 37 is in contact with the rear surface of the vertical plate portion 32v of the magnet support plate 32.
Therefore, the trigger actuating member 31 is urged forward by the torsion coil spring 37 integrally with the first permanent magnet M1 and the latch locking member 35.

  As shown in FIG. 3, when the trigger actuating member 31 is urged by the torsion coil spring 37 and is located at the foremost position, the first permanent magnet M1 approaches the inner surface of the front plate 12, and the latch locking member Reference numeral 35 denotes a position at which the front end locking portion 25bb of the latch locking piece 25b of the lock locking member 25 abuts and presses from below.

The handle hub 18 into which the angular shaft of the lever handle 15 is inserted is located on the rear side immediately below the dead bolt 20.
The rotating handle hub 18 has a locking piece 18a protruding from the lower part to the front, and a pressure receiving plate 19 is fixed to the upper part of the handle hub 18 and protrudes rearward.

A guide shaft 41 is erected on the support plate 40 below the pressure receiving plate 19 on the rear side of the handle hub 18, and the pressing member 42 is fitted on the guide shaft 41 so as to cover from above, and is wound around the guide shaft 41. The compression coil spring 43 biases the pressing member 42 upward.
The pressing member 42 biased upward by the compression coil spring 43 presses the handle hub 18 counterclockwise in a side view shown in FIG. Rotating force is applied.

The handle hub 18 has a notch surface 18b formed vertically on the upper surface of the locking piece portion 18a, with the upper portion of the locking piece portion 18a protruding forward from the lower part cut out in an L shape. A first stopper member 44 that abuts against 18b from the front is fixed to the lock box 13 and provided.
Accordingly, the handle hub 18 urged by the compression coil spring 43 via the pressure receiving plate 19 is brought into contact with the first stopper member 44 and its rotation is restricted.

A handle operating lever 45 extends upward from the upper portion of the handle hub 18.
When the handle operating lever 45 swings back and forth integrally with the handle hub 18 and swings back, the handle operating lever 45 can contact the second roller 28 of the lock locking member 25 and rotate the lock locking member 25. it can.

The second stopper member 46 protrudes and protrudes between the first stopper member 44 that abuts on the notch surface 18b of the handle hub 18 and restricts the rotation, and the locking piece portion 18a that protrudes forward from the lower portion of the handle hub 18. To do.
That is, the second stopper member 46 is provided at the rear end of the horizontal sliding plate 47 that is supported by the support pins 48 and that slides back and forth.

A solenoid 50 as an electromagnetic actuator is provided below the handle hub 18 so that the rod 50a protrudes forward.
The solenoid 50 is remotely operated.
A first link member 51 is fitted to the front end of the rod 50a, and a long hole 51h is formed in the front portion of the first link member 51 in the front-rear direction.

A second link member 52 is pivotally supported on a support shaft 53 that passes through the long hole 51h of the first link member 51 and projects from the inner surface of the lock box 13.
The second link member 52 is connected to the first link member 51 by a connecting pin 54 below the support shaft 53, and the upper end engaging portion 52 a is engaged with the horizontal sliding plate 47.

In the state shown in FIG. 3, the solenoid 50 causes the rod 50a to protrude, and the horizontal sliding plate 47 is moved rearward via the link mechanism of the first link member 51 and the second link member 52, so that the first stopper member A second stopper member 46 at the rear end of the horizontal sliding plate 47 is inserted between 44 and the locking piece 18 a of the handle hub 18.
Therefore, as shown in FIG. 3, since the rotation of the handle hub 18 is restricted by the first stopper member 44 and the second stopper member 46, the square shaft is inserted into the square hole of the handle hub 18 and rotated integrally. The moving lever handle 15 cannot be rotated.

  Here, when the solenoid 50 retracts the rod 50a together with the first link member 51, the second link member 52 swings counterclockwise around the support shaft 53 in the side view shown in FIG. Then, by moving the horizontal sliding plate 47 engaged with the upper end engaging portion 52a of the second link member 52 forward, the second stopper member 46 and the first stopper member 44 are moved as shown in FIG. Since the handle hub 18 comes off from the engagement piece 18a, the clockwise rotation restriction of the handle hub 18 is released, and the lever handle 15 can be rotated as shown in FIG. The hub 18 is rotated against the urging force of the compression coil spring 43 to swing the handle operating lever 45, and the locked state of the dead bolt 20 can be released as will be described later.

The automatic locking device 10 of the first embodiment has the above-described structure, and omits the mechanism for releasing the locked state below the dead bolt 20 from the door opening state to the door closing state. This will be described with reference to FIGS.
FIG. 4 shows the same open state as that in FIG. 3, and shows a latched state in which the dead bolt 20 protrudes to an intermediate protrusion amount.

That is, since the door 5 is in an open state away from the vertical frame portion 3a of the door frame 3, there is no strike plate 11 of the vertical frame portion 3a at a position facing the front plate 12 of the automatic locking device 10, and therefore The first permanent magnet M1 is not subjected to the repulsive force due to the magnetic force of the second permanent magnet M2, and is positioned in front of the front plate 12 by the biasing force of the torsion coil spring 37.
Therefore, the latch locking member 35 is also in the forward position via the magnet support plate 32.

A latching portion 25bb, which is a bent portion at the tip of the latch locking piece 25b of the lock locking member 25 that is urged by the torsion coil spring 24, presses against the latch locking member 35 at the front position from below. Thus, clockwise rotation of the lock engaging member 25 is restricted in a side view shown in FIG.
At this time, the lock locking piece 25 a of the lock locking member 25 is engaged with the latch recess 20 q of the dead bolt 20.

  Therefore, as shown in FIG. 4, the dead bolt 20 engaged with the lock locking member 25 protrudes from the front plate 12 by the intermediate protrusion Pa to the lock locking member 25 whose rotation is restricted. By engaging, further forward protrusion is restricted.

However, the backward movement of the dead bolt 20 is because the lock locking member 25 can rotate counterclockwise in the side view shown in FIG. 3 against the urging force of the torsion coil spring 24. The bolt 20 can be moved rearward.
That is, when the door 5 is in the open state, the dead bolt 20 protrudes to the intermediate protrusion amount Pa, the protrusion beyond that is restricted, and the rearward movement is permitted.

  When the door 5 starts to close from this open state and the inclined surface 20s of the projecting end (front end) of the dead bolt 20 projecting to the intermediate projecting amount Pa comes into contact with the strike plate 11, as shown in FIG. The bolt 20 is retracted slightly backward against the urging force of the compression coil spring 22, and at the same time, the lock locking member 25 engaged with the dead bolt 20 is slightly rotated counterclockwise, and the latch locking piece 25b The locking portion 25bb, which is the tip bending portion, is separated from the latch locking member 35.

Further, when the door 5 is closed, as shown in FIG. 6, the dead bolt 20 further retreats due to contact with the strike plate 11, and the tip of the dead bolt 20 comes into contact with the surface of the strike plate 11.
At the same time, the first permanent magnet M1 approaches the second permanent magnet M2 on the inner surface of the strike plate 11, and a repulsive force is exerted by the same magnetic poles opposed to each other. Since the integral latch locking member 35 is not pressed by the latch locking piece 25b via the support plate 32 and the trigger operating member 31, the first permanent magnet M1 is rearward together with the trigger operating member 31 and the latch locking member 35. It moves without resistance (see FIG. 6).
Therefore, the latch locking member 35 is not in a position where the locking portion 25bb of the lock locking member 25 is in pressure contact, and the lock locking member 25 can be rotated clockwise in a side view shown in FIG.

  Next, when the door 5 is completely closed, as shown in FIG. 7, the dead bolt 20 faces the locking port 11 a opened in the strike plate 11, so that the dead bolt 20 protrudes due to the urging force of the compression coil spring 22. Thus, the projection 20b of the dead bolt 20 is inserted through the locking port 11a and protrudes to the maximum protruding amount Pb that contacts the inner surface of the front plate 12.

  Due to the protrusion of the dead bolt 20, the lock locking member 25 having the lock locking piece 25a engaged with the latch recess 20q of the dead bolt 20 is interlocked and rotated clockwise in a side view shown in FIG. When the lock engagement piece 25a comes out of the latch recess 20q and the latch engagement piece 25b of the lock engagement member 25 comes into contact with the horizontal plate 33h of the guide plate 33 and the rotation is restricted, the lock engagement The front end surface of the piece 25a faces the rear slope 20pr of the lock locking projection 20p of the dead bolt 20 so as to be able to come into contact, and the movement of the dead bolt 20 to the rear is the lock locking piece 25a of the lock locking member 25. Regulated by

Therefore, as shown in FIG. 7, when the dead bolt 20 protrudes up to the maximum protruding amount Pb and is inserted through the lock port 11a of the strike plate 11, the backward movement of the dead bolt 20 is restricted. It becomes locked.
The door 5 is in the closed state, and the dead bolt 20 is inserted into the locking port 11a and is in the locked state.

As shown in FIG. 3, when the solenoid 50 retracts the rod 50a and the second stopper member 46 is inserted between the first stopper member 44 and the locking piece 18a of the handle hub 18, the lever The handle 15 cannot be rotated, and the lever handle 15 cannot release the locked state.
Therefore, in this state, the locked state cannot be released unless the key is inserted into the lock cylinder 16 and the cylinder cam 17 is rotated.

FIG. 8 shows that the cylinder cam 17 is rotated clockwise in a side view shown in FIG. It is rotated counterclockwise against the urging force of 24.
Accordingly, the lock engagement piece 25a of the lock engagement member 25 is disengaged from the position facing the rear inclined surface 20pr of the lock engagement protrusion 20p of the dead bolt 20, and the locked state is released here.

Further, when the key is operated and the cylinder cam 17 rotates clockwise in a side view shown in FIG. 8, the cam piece 17a of the cylinder cam 17 swings the first roller 27 forward as shown in FIG. Then, since the lock locking member 25 is further rotated counterclockwise, the lock locking piece 25a is engaged with the latch recess 20q of the dead bolt 20 while swinging backward, and the locked state is released. The dead bolt 20 is retracted backward, is removed from the locking port 11a of the strike plate 11, and is retracted into the rectangular port 12a of the front plate 12.
Therefore, the door 5 can be opened.

  When the door 5 is opened, as shown in FIG. 10, there is no strike plate 11 of the vertical frame portion 3a at a position opposite to the front plate 12, and therefore the first permanent magnet M1 is the second permanent magnet M2. The repulsive force due to the magnetic force is lost, and the biasing force of the torsion coil spring 37 moves forward together with the trigger actuating member 31 and the latch locking member 35.

  Thereafter, when the key is operated to rotate the cylinder cam 17 counterclockwise in the side view shown in FIG. 10 to return to the original state, the first roller 27 remains in contact with the cam piece 17a of the cylinder cam 17. The lock latching member 25 is rotated clockwise by the biasing force of the torsion coil spring 24, and the tip latching portion 25bb of the latch latching piece 25b is in pressure contact with the latch latching member 35 moved forward from below. Since the dead bolt 20 protrudes forward due to the urging force of the compression coil spring 22, the dead bolt 20 shown in FIG.

  To release the locked state other than the key operation, there is a method of rotating the lever handle 15, but as described above, the solenoid 50 protrudes forward from the rod 50a, and as shown in FIG. 2 The lever handle 15 needs to be able to be rotated as the stopper member 46 is removed from between the first stopper member 44 and the locking piece 18a of the handle hub 18.

In the state shown in FIG. 11, when the lever handle 15 is rotated clockwise against the urging force of the compression coil spring 43, the handle hub 18 rotates clockwise as shown in FIG. Then, the handle operating lever 45 swinging integrally with the handle hub 18 swings the second roller 28 of the lock locking member 25 rearward to rotate the lock locking member 25 counterclockwise. As in the case of the key operation as shown in Fig. 2, the lock locking piece 25a swings backward while engaging the latch recess 20q of the dead bolt 20 and the dead bolt 20 released from the locked state is moved backward. Retract, pull out from the locking port 11a of the strike plate 11, and retract into the rectangular port 12a of the front plate 12.
Therefore, the door 5 can be opened.

  When the door 5 is opened, the first permanent magnet M1 loses the repulsive force due to the magnetic force of the second permanent magnet M2, and moves forward together with the latch locking member 35 by the biasing force of the torsion coil spring 37 (FIG. 10). After that, when the lever handle 15 returns to the original rotation position by the biasing force of the compression coil spring 43, the lock handle is locked by the biasing force of the torsion coil spring 24 while the second roller 28 is in contact with the handle operating lever 45. The stop member 25 is rotated clockwise, and the leading end locking portion 25bb of the latch locking piece 25b is pressed from below to the latch locking member 35 moved forward, and the dead bolt 20 is connected to the compression coil spring 22. Since it protrudes forward by the urging force, the door is in an open state in which the dead bolt 20 shown in FIG. 3 protrudes to the intermediate protrusion amount Pa.

  As described above, the locked state can be released by the turning operation of the lever handle 15 because the solenoid 50 protrudes forward from the rod 50a, and the second stopper member 46 is the second stopper member 46 as shown in FIG. 1 It must be set in a state where it has come out from between the stopper member 44 and the locking piece 18a of the handle hub 18.

  Therefore, the solenoid 50 causes the rod 50a to protrude, and the second stopper member 46 at the rear end of the horizontal sliding plate 47 is inserted between the first stopper member 44 and the locking piece 18a of the handle hub 18. If the state is set, the locked state cannot be released by the turning operation of the lever handle 15, and the locked state cannot be released unless the key is inserted into the lock cylinder 16 and the key is operated.

When the door is opened, the automatic locking device 10 is in a latched state in which the dead bolt 20 protrudes by an intermediate protruding amount as shown in FIG. 3, and the first permanent magnet M1 on the door end side of the door 5 is on the door frame 3 side. It does not correspond to the second permanent magnet M2 inside the strike plate 11 and does not actuate the trigger actuating member 31 due to the magnetic force, and the dead bolt 20 protrudes from the surface of the front plate 12 of the door 5. Since the trigger protruding / extracting member or the like is not flat, the first permanent magnet M1 and the trigger operating member 31 are not operated by mistake or mischief.
Therefore, the latched state is not released when the door is opened, and the dead bolt 20 can be prevented from protruding to the maximum protruding amount and being locked.

  If it is set so that operation of both the inner and outer handle levers is not normally possible in order to strictly control the entrance and exit of people, as before, the trigger is activated when the door is opened and the dead bolt reaches the maximum protruding amount. If the key protrudes to the locked state, the key is not at hand, so the locked state cannot be released immediately, and the state where the dead bolt protrudes to the maximum protruding amount for a long time continues. There is a risk that the projecting deadbolt may be damaged by colliding with the door frame, but the automatic locking device 10 can prevent such an accident in advance.

  The trigger mechanism 30 of the automatic locking device 10 generates a repulsive force when the first permanent magnet M1 and the second permanent magnet M2 are opposed to each other when the door is closed. Therefore, when the door is closed, the first permanent magnet M1 In response to the two permanent magnets M2, the same magnetic poles are made to face each other to receive a repulsive force, and retract with the trigger actuating member 31 to actuate the latch locking member 35.

  In such a trigger mechanism 30, even when a ferromagnetic material such as iron approaches the front plate 12 and is magnetized by the corresponding first permanent magnet M1 when the door is opened, the first permanent magnet M1 is attracted forward. However, the trigger actuating member does not move backward due to repulsive force. That is, because of the ferromagnetic material, the trigger mechanism does not operate accidentally, and it is possible to prevent the dead bolt from protruding to the maximum protruding amount and becoming locked.

  In the case of the automatic locking device 10, the handle hub 18 into which the angular shaft of the lever handle 15 is inserted is configured by superimposing the inner and outer two sheets. The stopper member 46 is inserted between the first stopper member 44 and the engaging piece portion of the outer handle hub, and only the outer handle hub is restricted from rotating.

  However, the inner lever handle and the outer lever handle have a common angular axis, and by inserting the same angular axis into the inner and outer handle hubs, the inner and outer handle hubs and the inner and outer lever handles rotate together, When the second stopper member 46 is inserted between the first stopper member 44 and the engaging piece of the outer handle hub by driving the solenoid 50, both the inner and outer lever handles cannot be operated. Yes.

In some cases, the inner lever handle and the outer lever handle have separate angular axes, and each angular axis is fitted to the inner and outer handle hubs.
In this case, when the dead bolt protrudes by the maximum protrusion amount and is in the locked state, the locked state can always be released by operating the inner lever handle regardless of whether the solenoid 50 is driven.

However, if you notice that the dead bolt protrudes the maximum amount of protrusion when the door is open and is locked, there is a situation where the protruding dead bolt collides with the doorway frame in an attempt to close the door without operating the inner lever handle. It will occur.
In the case of the automatic locking device 10, since the dead bolt is prevented from projecting to the maximum projecting amount when the door is opened and locked, it is possible to prevent such a situation from occurring.

Next, an automatic locking device 60 according to another second embodiment will be described with reference to FIGS.
FIG. 13 is a cross-sectional view showing the internal structure of the lock box 63 of the automatic locking device 60, and shows a latched state in which the dead bolt 70 at the time of opening the door protrudes from the front plate 62 to the intermediate protrusion amount.
The dead bolt 70 is slidably supported back and forth and is urged forward by a compression coil spring 72 interposed between the lock wall 63 and the rear wall 63r.

The dead bolt 70 has a lock stepped portion 70p formed from the rear surface of the bolt head portion 70a, a long rectangular parallelepiped bolt portion 70b extending rearward, and a latch projection 70q on the upper side surface of the bolt portion 70b. It is formed so as to protrude diagonally forward.
An inclined surface 70s is formed at the front end of the bolt head 70a.
A projection 70r protrudes downward from the rear end portion of the bolt portion 70b, and a stopper 71 is fixed to the lock box 63 at a predetermined position in front of the projection 70r.

Above the dead bolt 70, a lock locking member 75 and a latch locking member 85 are pivotally supported on a common support shaft 80 so as to be swingable.
The lock locking member 75 extends in the front-rear direction of the support shaft 80, and the front end of the lock-locking flange 75f on the front side of the support shaft 80 swings up and down near the inner surface of the front plate 62. The rear engagement collar portion 75r extends rearward from the lower side of the support shaft 80, and a concave portion 75ra and a convex portion 75rb are continuously formed in the front and rear at the front portion of the upper side edge of the rear side engagement flange portion 75r. ing.
A locking pin 76 projects from the front portion of the front lock locking collar 75f.

  The latch locking member 85 extends in the front and rear direction of the support shaft 80, and the front end of the lock locking hook portion 85f on the front side of the support shaft 80 is bent downward to form a latch locking claw portion 85n. The claw portion 85n is located behind the front end of the lock locking collar portion 75f of the lock locking member 75 and swings up and down.

A trigger engagement protrusion 85t is formed substantially above the support shaft 80 at the rear portion of the upper side edge of the lock latching flange 85f.
A locking protrusion 85s is formed on the upper side edge of the lock locking flange 85f immediately before the trigger engagement protrusion 85t.
A rear flange 85r on the rear side of the support shaft 80 extends to the vicinity of the rear end of the lock locking member 75 and swings up and down, and a locking pin 86 projects from the rear of the rear flange 85r. Yes.

One end of the torsion coil spring 81 wound around the support shaft 80 is locked to the locking pin 76 of the lock locking collar 75f of the lock locking member 75, and the other end is the rear side of the latch locking member 85. The lock engaging member 75 and the latch engaging member 85 are urged to rotate in opposite directions by engaging with the engaging pin 86 of the flange portion 85r.
That is, as viewed from the side in FIG. 13, the lock locking member 75 is biased to rotate counterclockwise, and the latch locking member 85 is biased to rotate clockwise.

  In the latched state in which the dead bolt 70 at the time of opening the door shown in FIG. 13 protrudes to the intermediate protrusion amount Pa, the lock engaging member 75 has the front end of the lock engaging collar 75f at the upper surface of the bolt head 70a of the dead bolt 70. The latch locking member 85 has a latch locking claw 85n at the front end of the lock locking collar portion 85f locked to the front surface of the latch projection 70q of the bolt portion 70b of the dead bolt 70.

A trigger actuating member 91 of the trigger mechanism 90 is provided on the upper side of the lock engaging member 75 and the latch engaging member 85 so as to be slidable back and forth.
The trigger actuating member 91 is a plate member, and the front end of the horizontal plate portion 91h is bent upward to form a vertical plate portion 91v, and the first permanent magnet M1 is fixed to the front surface of the vertical plate portion 91v. .

A spring receiving plate 92 is fixed to the lock box 63 so as to face the rear of the vertical plate portion 91v, and a compression coil spring 93 is interposed between the spring receiving plate 92 and the vertical plate portion 91v.
Trigger engagement step portions 91t are formed at predetermined positions on the side edges of the horizontal plate portion 91h of the trigger actuating member 91.

The trigger engagement protrusion 85t of the latch locking member 85 is engaged with the trigger engagement step 91t of the trigger operation member 91 biased by the compression coil spring 93 from the front.
Therefore, when the trigger actuating member 91 moves back and forth, the trigger engaging protrusion 85t engaged with the retracting trigger engaging step 91t is driven, and the latch locking member 85 rotates.

A lock cylinder 66 having a cylinder cam 67 is disposed on the rear side above the trigger mechanism 90.
Immediately below the lock cylinder 66, an unlocking rotation member 95 is rotatably supported by a rotation shaft 96.
The unlocking turning member 95 has a turning hook portion 95b that extends downward from the front portion of the turning base portion 95a around the turning shaft 96 and a protruding portion that protrudes downward from the rear portion of the turning base portion 95a. 95c protrudes.
The tip of the rotary hook 95b is inserted into a long elongated hole before and after penetrating vertically through the bolt 70b of the dead bolt 70, and when the rotary hook 95b swings backward, the rotary hook 95b The front end portion 95bb can contact the rear wall 70bb of the bolt portion 70b from the front and can be pressed rearward.

A roller 97 is pivotally supported on the upper part of the rotation base 95a of the unlocking rotation member 95. When the cylinder cam 67 of the lock cylinder 66 is rotated on the roller 97, the cam piece 67a of the cylinder cam 67 is rotated. Can act against each other.
A locking pin 98 protrudes from the rotary hook 95b of the unlocking rotary member 95.
A locking pin 94 is fixed between the spring receiving plate 92 and the unlocking rotation member 95.

The torsion coil spring 99 wound around the rotating shaft 96 has one end locked to the locking pin 94 and the other end locked to the locking pin 98 of the unlocking rotating member 95 to release the lock. The moving member 95 is urged clockwise in a side view shown in FIG.
In the latched state shown in FIG. 13, the locking pin 98 of the unlocking rotation member 95 faces the concave portion 75ra on the upper side edge of the rear side engagement flange 75r of the lock locking member 75 from above.

A handle hub 100 into which the angular axis of the lever handle is fitted is provided at the rear of the lower side of the dead bolt 70.
The handle hub 100 projects a pair of protrusions 100p, 100p obliquely forward and backward from the rotation center, and an engagement recess 100q is formed between the front and rear protrusions 100p, 100p.

On the handle hub 100, the unlocking elevating member 101 is supported so as to be able to move up and down so that the leg portions 101p, 101p divided into two branches straddle.
The unlocking elevating member 101 is supported by the bent lower end portions 101pp and 101pp of the front and rear leg portions 101p and 101p being in contact with the upper end edges of the protrusions 100p and 100p of the handle hub 100, respectively.
The unlocking elevating member 101 has a main body portion 101a extending upward from the rear leg portion 101p, and an upper end edge 101b of the main body portion 101a is close to the protrusion 95c of the unlocking rotation member 95.

  A center spring is fixed to a fixing pin 104 projecting in front of the front leg 101p of the unlocking lifting member 101, and a spring spring 105 is provided. The free end of the spring 105 is unlocked lifting member The lower end 101pp of the front leg 101p of the 101 is in contact with the bent lower end 101pp from above and pressed downward.

Below the mainspring spring 105, a support shaft 110 projects from the lock box 63. A rotation restricting member 111 is pivotally supported on the support shaft 110 so as to be swingable.
The rotation restricting member 111 has a front projecting portion 111f projecting forward from the support shaft 110, a rear flange 111r extending from the rear of the support shaft 110, and a bent end portion 111rr bent above the rear end. The hub 100 is engaged with the engaging recess 100q.
The front protrusion 111f of the rotation restricting member 111 has a notch 111ff at the front edge.

A solenoid 120 as an electromagnetic actuator is provided between the front plate 62 and the mainspring spring 105 so that the rod 120a protrudes downward.
An engaging plate 121 is fixed to the lower end of the rod 120a in a horizontal posture, and a rear end portion extending rearward of the engaging plate 121 is inserted into a notch 111ff of the front protruding portion 111f of the rotation restricting member 111. .

  In the latched state in which the dead bolt 70 at the time of opening the door shown in FIG. 13 protrudes to the intermediate protrusion amount Pa, the bent end 111rr of the rear flange 111r extending substantially horizontally behind the rotation restricting member 111 is the handle hub. Since the handle hub 100 is engaged with the 100 engaging recesses 100q, the rotation of the handle hub 100 is restricted, and the lever handle 15 that rotates integrally with the square shaft inserted into the square hole of the handle hub 100 cannot be rotated. Is in a state.

  Here, when the solenoid 120 retracts the rod 120a and raises the engagement plate 121, the rotation restricting member 111 in which the notch 111ff of the front protrusion 111f is engaged with the engagement plate 121 is increased due to the large weight of the rear flange 111r. 13, the bent end portion 111rr of the rear flange 111r is detached from the engagement recess 100q of the handle hub 100, and thus the rotation restriction of the handle hub 100 is released. As shown in FIG. 22, the lever handle 15 can be turned, and the handle hub 100 is turned to raise the unlocking lifting member 101 against the urging force of the mainspring spring 105, as will be described later. The dead bolt 70 can be unlocked.

The automatic locking device 60 of the second embodiment has the above-described structure, and omits the mechanism for releasing the locked state below the dead bolt 70 from the door opening state to the door closing state. This will be described with reference to FIGS.
FIG. 14 shows the same open state as that of FIG. 13 and shows a latched state in which the dead bolt 70 protrudes to an intermediate protrusion amount.

  That is, since the door is in an open state, there is no strike plate 61 of the vertical frame portion at a position facing the front plate 12 of the automatic locking device 10, and therefore the first permanent magnet M1 is repulsive due to the magnetic force of the second permanent magnet M2. And is positioned in front of the front plate 62 by the urging force of the torsion coil spring 37.

  Therefore, since the trigger actuating member 91 that supports the magnet support plate 32 is also in the forward position, the latch engaging member 85 in which the trigger engaging protrusion 85t is engaged with the trigger engaging step 91t of the trigger actuating member 91 is locked. The latching claw 85n is latched to the front surface of the latch projection 70q of the dead bolt 70 by swinging the latching portion 85f downward.

Therefore, as shown in FIG. 14, the dead bolt 70 protrudes from the front plate 62 by an intermediate protrusion amount Pa, and the latch protrusion 70 q of the dead bolt 70 is locked to the latch locking claw 85 n, Further forward protrusion is restricted and in a latched state.
In this latched state, the dead bolt 70 can move backward against the urging force of the compression coil spring 72.

  When the inclined surface 70s of the projecting end (front end) of the dead bolt 70 projecting to the intermediate projecting amount Pa comes into contact with the strike plate 61 from the opened state, the dead bolt 70 is shown in FIG. Since 70 retreats slightly backward against the urging force of the compression coil spring 72, the retraction of the latch projection 70q of the dead bolt 70 releases the latch engagement with the latch engagement claw 85n.

Further, when the door is closed, as shown in FIG. 16, the dead bolt 70 is further retracted by the contact with the strike plate 61, and the tip of the bolt head 70 a is in contact with the surface of the strike plate 61.
At the same time, the first permanent magnet M1 approaches the second permanent magnet M2 on the inner surface of the strike plate 61, and the repulsive force is exerted by the same magnetic poles facing each other. The first permanent magnet M1 receives the force rearward and moves backward together with the trigger actuating member 91. Move to.

The trigger engaging protrusion 85t engaged with the trigger engaging step 91t that is retracted by the rearward movement of the trigger actuating member 91 is driven by the biasing force of the torsion coil spring 81, and the latch protrusion by the latch locking claw 85n. The latch locking member 85 released from the locking with the portion 70q rotates clockwise in a side view shown in FIG. 16, and stops when the locking projection 85s is locked to the spring receiving plate 92.
Accordingly, since the latch locking claw portion 85n swings upward and retracts, the forward movement of the dead bolt 70 is not restricted.

  Next, when the door is completely closed, as shown in FIG. 17, the dead bolt 70 faces the locking port 61 a opened in the strike plate 61, so that the dead bolt 70 protrudes due to the urging force of the compression coil spring 72. The protrusion 70r of the dead bolt 70 is inserted through the locking port 61a and protrudes to the maximum protrusion amount Pb that contacts the stopper 71.

  During the forward movement of the dead bolt 70, the lock locking collar 75 f of the lock locking member 75 that is in contact with the upper surface of the bolt head 70 a is locked by the urging force of the torsion coil spring 81. At 70p, it swings downward and comes into contact with the bolt portion 70b. The front end of the lock locking collar 75f faces the rear surface of the lock locking step portion 70p of the bolt head 70a, and the dead bolt 70 is moved backward. Movement is restricted and the locked state is entered.

At this time, the rear engagement flange 75r of the lock engaging member 75 swings upward, and the concave portion 75ra on the upper side edge of the rear engagement flange 75r becomes the rotation flange 95b of the lock release rotation member 95. It engages with a locking pin 98 projecting from.
The door is in the closed state, and the dead bolt 70 is inserted into the locking port 61a and is in the locked state.

As shown in FIG. 13, when the solenoid 120 retracts the rod 120a and the bent end 111rr of the rotation restricting member 111 is engaged with the engagement recess 100q of the handle hub 100, the lever handle is rotated. It cannot be operated and cannot be unlocked with the lever handle.
Therefore, in this state, the locked state cannot be released unless the key is inserted into the lock cylinder 66 and the cylinder cam 67 is rotated.

  18, the cylinder cam 67 is rotated clockwise in a side view shown in FIG. 18 by a key operation, and the cam piece 67a of the cylinder cam 67 abuts on the roller 97, and the unlocking rotation member 95 is twisted by the torsion coil spring 99. It is slightly rotated counterclockwise against the urging force.

  The locking pin 98 projecting from the rotation hook portion 95b of the unlocking rotation member 95 swings rearward, and comes out of the concave portion 75ra of the rear engagement hook portion 75r of the lock locking member 75. Since the convex portion 75rb is pressed downward, the lock locking member 75 is rotated clockwise in a side view shown in FIG. 18, and the lock locking collar 75f is swung upward to lock the lock. Since the front end of the flange 75f is disengaged from the position opposite to the lock engagement step portion 70p of the dead bolt 70 and retracts upward, the dead bolt 70 can be retracted rearward and the locked state is released.

  Further, when the key is operated and the cylinder cam 67 rotates clockwise in a side view shown in FIG. 18, the cam piece 67a of the cylinder cam 67 swings the roller 97 forward as shown in FIG. Since the unlocking rotation member 95 is further rotated counterclockwise, the front end portion 95bb of the rotation hook portion 95b presses the front surface (inner surface) of the rear wall 70bb of the bolt portion 70b of the dead bolt 70 backward. The dead bolt 70 is moved rearward and retracted into the rectangular opening 62a of the front plate 62.

  At the same time, the swinging of the locking hook 95b to the rear of the unlocking turning member 95 causes the locking pin 98 to swing rearward, so that the locking pin 98 is the rear engagement hook of the lock locking member 75. When it moves backward while slidingly contacting the upper side edge of 75r and passes the rear side engagement flange 75r, the lock locking member 75 is viewed in a side view shown in FIG. 19 by the rotational biasing force of the torsion coil spring 81. The lock locking collar 75f is brought into contact with the upper surface of the bolt head 70a of the dead bolt 70 that rotates counterclockwise and retracts backward.

In this state, since the dead bolt 70 is retracted into the rectangular opening 62a of the front plate 62, the door can be opened.
When the door is opened, as shown in FIG. 20, there is no strike plate 61 at the opposite position of the front plate 62. Therefore, the first permanent magnet M1 loses repulsive force due to the magnetic force of the second permanent magnet M2. The trigger engaging member 91 is moved forward together with the trigger actuating member 91 by the urging force of the compression coil spring 93, so that the trigger engaging step 91t of the trigger actuating member 91 is engaged with the trigger engaging protrusion 85t of the latch locking member 85 from the rear. Then, the latch locking member 85 is rotated counterclockwise in a side view shown in FIG. 20, and the latch locking claw 85n at the tip of the lock locking collar 85f of the latch locking member 85 is The dead bolt 70 is brought into contact with the upper surface of the bolt head 70a.

When the latch locking claw portion 85n of the latch locking member 85 is brought into contact with the upper surface of the bolt head portion 70a, the latch locking claw portion 85n is positioned in front of the latch protrusion 70q of the dead bolt 70.
After that, when the cylinder cam 67 is rotated counterclockwise in the side view shown in FIG. 20 to return to the original state by operating the key, the unlocking rotation member 95 is rotated by the urging force of the torsion coil spring 99. 14 and the dead bolt 70 protrudes forward due to the urging force of the compression coil spring 72, so that the latch protrusion 70q of the dead bolt 70 is locked to the latch locking claw portion 85n. The indicated dead bolt 70 is in the open door state protruding to the intermediate protrusion amount Pa.

  In order to release the locked state other than the key operation, there is a lever handle rotation operation. As described above, the solenoid 120 retracts the rod 120a upward, and as shown in FIG. The lever 111 can be pivoted by swinging the rear collar 111r of the member 111 downward so that the bent end 111rr of the rear collar 111r is removed from the engagement recess 100q of the handle hub 100. It is necessary to keep.

  When the lever handle is operated in the state shown in FIG. 21, as shown in FIG. 22, the handle hub 100 is rotated clockwise in the side view shown in FIG. The unlocking elevating member 101 is pushed upward against the urging force of the mainspring spring 105.

The upper end edge 101b of the main body portion 101a of the unlocking lifting member 101 is brought into contact with and pressed against the protrusion 95c of the unlocking turning member 95 by raising the unlocking lifting member 101, whereby the unlocking turning member 95 is shown in FIG. As shown in FIG. 19, the lock lever 95b of the unlocking rotation member 95 is swung backward while being locked as in the case of the key operation as shown in FIG. The locked state by the stop member 75 can be released, the dead bolt 70 can be retracted backward, and the dead bolt 20 can be retracted into the rectangular opening 12a of the front plate 12.
Therefore, the door can be opened.

  When the door is opened, the first permanent magnet M1 loses the repulsive force due to the magnetic force of the second permanent magnet M2, and moves forward together with the trigger actuating member 91 by the urging force of the compression coil spring 93 (see FIG. 20). The latch locking claw 85n at the tip of the lock locking collar 85f of the latch locking member 85 engaged with the trigger actuating member 91 is brought into contact with the upper surface of the bolt head 70a of the dead bolt 70, and then the lever handle When the spring spring 105 returns to the original rotational position by the biasing force of the mainspring spring 105, the unlocking lifting member 101 is lowered, the unlocking pivoting member 95 is pivoted clockwise, and the dead bolt 70 is moved to the compression coil spring 72. Since it protrudes forward by the urging force, the door is in an open state in which the dead bolt 70 shown in FIG. 13 protrudes to the intermediate protrusion amount Pa.

  Therefore, when the solenoid 120 is set so that the rod 120a protrudes and the bent end 111rr of the rear flange 111r of the rotation restricting member 111 is engaged with the engagement recess 100q of the handle hub 100, The locked state cannot be released by turning the lever handle, and the locked state cannot be released unless the key is inserted into the lock cylinder 66 and operated.

When the door is opened, as shown in FIG. 13, the automatic locking device 60 is in a latched state in which a dead bolt 70 protrudes an intermediate protrusion amount, and the first permanent magnet M1 on the door end side of the door is a strike on the door frame side. It does not correspond to the second permanent magnet M2 inside the plate 61, the magnetic force does not act to actuate the trigger actuating member 91, and the surface of the front plate 62 of the door is flat except that the dead bolt 70 protrudes. Since the trigger in / out member or the like does not protrude, the first permanent magnet M1 and the trigger operating member 91 are not operated by mistake or mischief.
Therefore, the latched state is not released when the door is opened, and the dead bolt 70 can be prevented from protruding to the maximum protruding amount and being locked.

  If it is set so that operation of both the inner and outer handle levers is not normally possible in order to strictly control the entrance and exit of people, as before, the trigger is activated when the door is opened and the dead bolt reaches the maximum protruding amount. If the key protrudes to the locked state, the key is not at hand, so the locked state cannot be released immediately, and the state where the dead bolt protrudes to the maximum protruding amount for a long time continues. There is a risk that the projecting deadbolt may be damaged by colliding with the door frame, but the automatic locking device 60 can prevent such an accident in advance.

  The trigger mechanism 90 of the automatic locking device 10 generates a repulsive force when the first permanent magnet M1 and the second permanent magnet M2 are opposed to each other when the door is closed. Therefore, when the door is closed, the first permanent magnet M1 In response to the two permanent magnets M2, the same magnetic poles are made to face each other to receive a repulsive force, and the latch actuating member 85 can be operated by retreating together with the trigger actuating member 91.

  In such a trigger mechanism 90, even when a ferromagnetic material such as iron approaches the front plate 62 and is magnetized by the corresponding first permanent magnet M1 when the door is opened, the first permanent magnet M1 is attracted forward. However, the trigger actuating member does not move backward due to repulsive force. That is, because of the ferromagnetic material, the trigger mechanism does not operate accidentally, and it is possible to prevent the dead bolt from protruding to the maximum protruding amount and becoming locked.

  As mentioned above, although the automatic locking device which concerns on embodiment concerning this invention was demonstrated, the aspect of this invention is not limited to the said embodiment, What is implemented in various aspects in the range of the summary of this invention. Is included.

M1 ... 1st permanent magnet, M2 ... 2nd permanent magnet,
1 ... building, 2 ... wall, 3 ... door frame, 4 ... door, 5 ... door,
10 ... Automatic locking device, 11 ... Strike plate, 12 ... Front plate, 13 ... Lock box, 15 ... Lever handle, 16 ... Lock cylinder, 17 ... Cylinder cam, 18 ... Handle hub, 19 ... Pressure receiving plate,
20 ... dead bolt, 20s ... inclined surface, 20b ... projection, 20p ... lock locking projection, 20q ... latch recess, 21 ... guide shaft, 22 ... compression coil spring, 23 ..., 24 ... torsion coil spring,
25 ... Lock locking member, 25a ... Lock locking piece, 25b ... Latch locking piece, 26 ... Rotating shaft, 27 ... First roller, 28 ... Second roller, 29 ... Locking pin,
30 ... Trigger mechanism, 31 ... Trigger actuating member, 32 ... Magnet support plate, 33 ... Guide plate,
35 ... latch locking member, 36 ... support pin, 37 ... torsion coil spring,
40 ... support plate, 41 ... guide shaft, 42 ... pressing member, 43 ... compression coil spring, 44 ... first stopper member, 45 ... handle operating lever, 46 ... second stopper member, 47 ... horizontal sliding plate, 48 ... Support pins,
50 ... Solenoid, 51 ... First link member, 52 ... Second link member, 53 ... Support shaft, 54 ... Connecting pin,
60 ... Automatic locking device, 61 ... Strike plate, 62 ... Front plate, 63 ... Lock box, 66 ... Lock cylinder, 67 ... Cylinder cam,
70 ... Dead bolt, 70a ... Bolt head, 70b ... Bolt part, 70bb ... Rear wall, 70p ... Lock locking step, 70q ... Latch projection, 70r ... Projection, 71 ... Stopper, 72 ... Compression coil spring,
75 ... Lock locking member, 75f ... Lock locking collar, 75r ... Rear engagement collar, 75ra ... Recess, 75rb ... Projection, 76 ... Locking pin, 80 ... Support shaft, 81 ... Torsion coil spring,
85 ... Latch locking member, 85f ... Lock locking collar, 85n ... Latch locking claw, 85t ... Trigger engagement protrusion, 85s ... Locking protrusion, 85r ... Rear hook, 86 ... Lock pin ,
90 ... Trigger mechanism, 91 ... Trigger operating member, 91h ... Horizontal plate portion, 91v ... Vertical plate portion, 91t ... Trigger engagement step portion, 92 ... Spring receiving plate, 93 ... Compression coil spring, 94 ... Locking pin,
95 ... Unlocking rotation member, 95a ... Rotation base, 95b ... Rotation collar, 95c ... Projection, 96 ... Rotating shaft, 97 ... Roller, 98 ... Locking pin, 99 ... Torsion coil spring,
DESCRIPTION OF SYMBOLS 100 ... Handle hub, 100p ... Projection part, 100q ... Engagement recessed part, 101 ... Unlocking raising / lowering member, 101a ... Main body part, 101b ... Upper end edge, 101p ... Leg part, 104 ... Fixing pin, 105 ... Spring spring,
DESCRIPTION OF SYMBOLS 110 ... Support shaft, 111 ... Turning control member, 111f ... Front side protrusion part, 111ff ... Notch, 111r ... Rear side collar part, 111rr ... Bending edge part, 120 ... Solenoid, 121 ... Engagement plate.

Claims (4)

The bolt urging means (22, 72) is urged forward and protrudes forward from the front plate (12, 62) along the door edge of the door to the maximum protruding amount (Pb), and the bolt urging means (22 , 72) and a dead bolt (20, 70) having an inclined surface (20 s, 70 s) at the front end that recedes backward against the front plate (12, 62) against the inner side,
Lock locking members (25, 75) locked to the dead bolts (20, 70) protruding up to the maximum protruding amount (Pb) to restrict the backward movement of the dead bolts (20, 70) and to be locked. ,
A latch locking member (35, 85) for restricting the forward movement of the dead bolt (20, 70) protruding to an intermediate protrusion amount (Pa) smaller than the maximum protrusion amount (Pb) to be in a latch state;
When the door is closed, the trigger actuating member (31, 91) inside the front plate (12, 62) operates against the urging force of the trigger urging means (37, 93), and the latch locking member (35 , 85), and a trigger mechanism (30, 90) that releases the latched state.
The trigger mechanism (30, 90)
A first permanent magnet (M1) provided integrally with the trigger actuating member (31, 91) is provided to face the inner surface of the front plate (12, 62);
The inside of the strike plate (11, 61) on the door frame side having the locking port (11a, 61a) through which the dead bolt (20, 70) protruding from the front plate (12, 62) is inserted when the door is closed Is provided with a second permanent magnet (M2),
When the door is closed, the first permanent magnet (M1) receives a magnetic force acting on the second permanent magnet (M2) in response to the second permanent magnet (M2), thereby causing the trigger actuating member (31, 91) to move to the trigger biasing means (37 , 93), and operates against the urging force of the automatic locking device.   2. The trigger mechanism (30, 90) is characterized in that when the door is closed, the first permanent magnet (M 1) and the second permanent magnet (M 2) cause the same magnetic poles to face each other to generate repulsive force. The automatic locking device described. A lock locking projection (20p) and a latch recess (20q) are formed side by side on the side surface of the dead bolt (20) on the lock locking member (25) side,
The lock locking member (25) is rotatably provided, engages with the latch recess (20q), interlocks with the dead bolt (20), and engages with the lock locking projection (20p). A locking latch piece (25a) to stop and lock, and a latch locking piece (25b) to latch to the latch locking member (35),
The latch locking member (35) is fixed to the trigger actuating member (31),
The lock locking member (25) is rotated and biased by the rotation biasing means (24) in a direction in which the latch locking piece (25b) contacts the latch locking member (35). The automatic locking device according to claim 1 or 2, wherein the automatic locking device is characterized. A lock locking step (70p) and a latch protrusion (70q) are formed side by side on the side surface of the dead bolt (70) on the lock locking member (75) side,
The lock engaging member (75) is provided rotatably, and includes a lock engaging collar (75f) that is engaged with the lock engaging step (70p) to be locked.
The latch locking member (85) is rotatably provided and is engaged with a latch locking claw portion (85n) locked to the latch protrusion (70q) and the trigger operating member (91). Trigger engagement protrusion (85t) to be interlocked,
The lock urging means (81) causes the lock locking member (75) to move in the direction in which the lock locking collar (75f) is locked to the lock locking step (70p) of the dead bolt (70). At the same time as being urged to rotate, the latch engaging member (85) is urged to rotate in the direction in which the trigger engaging protrusion (85t) engages with the trigger actuating member (91). The automatic locking device according to claim 1 or 2.

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