JP2507450B2 - Automatic locking device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic locking device used for an entrance / exit door of a general house, a condominium such as a condominium, or a hotel.

[Conventional technology and problems]

Conventionally, a lock attached to a hinged door at a doorway has been locked and unlocked by a thumb turn from the inside and a key from the outside.

In addition, there is a type of lock that is automatically locked by closing the door, and since it has the advantage of preventing theft accident due to forgetting to lock it, or saving the trouble of chaining, cylinder locks and hotel locks have already been put to practical use. However, at present, there is only a latch fixing type or a dead latch type, and there is no dead bolt type automatic locking device yet.

The latch bolt fixed type lock and the dead latch type lock have a drawback that they are more vulnerable to breakage than the dead bolt, because the mechanical strength of the portion inserted into the fitting hole of the mating striker is insufficient.

In order to increase the reliability of the automatic locking device, it is desired that a robust locking device such as a dead bolt has an automatic locking function.

The present invention has been made to solve the above problems, and provides an automatic locking device having a simple structure in which a dead bolt having an excellent breaking strength can be automatically projected and automatically locked at the same time as the door is closed.

[Means for solving problems]

According to the present invention, a step is provided on a dead bolt that can be retracted from the front surface of a case, and a cam plate that is rotatably provided on the case and is urged to a locking angle and an unlocking angle by a spring engages the dead bolt. A drive piece to be fitted is provided, a slider provided so as to be able to move forward and backward in the case is engaged with the cam plate, and a spring biases the cam plate in a direction to drive the cam plate to a locking angle. Energize the retractable trigger bolt in the protruding direction,
A stopper is provided that is pivotally attached to the case, is urged in a direction to engage the slider in the forward position, and is pushed in a direction in which the trigger bolt is released when the trigger bolt retracts. The guard lever to be mounted is provided with a lever that can be engaged with and disengaged from the step portion, and is biased by a spring to a position where the engagement with the step portion is released, and when the drive piece rotates to the locking angle, The driving piece pushes the guard lever in a direction to engage the step portion.

[Action]

With the above configuration, when the door is closed, the trigger bolt protruding from the case is retracted into the case, the slider that is disengaged by this is moved, and the cam plate that interlocks with the slider rotates to set the lock angle. So
The door is automatically locked because the drive piece causes the dead bolt to project, and the lever of the guard lever pushes against the stepped portion of the dead bolt in the engaging direction to lock the dead bolt in the projecting state.

To unlock the locked door, rotate the cam plate to the unlocking angle using a key, etc. as in the conventional case, and the guard lever will return and the engagement with the step will be released, causing dead. The bolt is immersed.

Also, the slider that interlocks with the cam plate returns to the old position.

The trigger bolt projects from the case when the door is opened.

Embodiments Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a front view of the automatic locking device in a door open state, reference numeral 1 shows a case embedded in an end surface of a door D, and a trigger bolt insertion hole 2 and a dead body are provided on a front surface (left side in the drawing) of the case 1. The bolt insertion hole 3 is formed.

The trigger bolt 4 is inserted into the trigger bolt insertion hole 2 so as to be retractable.

An L-shaped spring bearing 5 is attached to the inner surface of the case 1, and a spring 6 is mounted between the spring bearing 5 and the trigger bolt 4.

Therefore, the trigger bolt 4 is biased toward the left side,
A shoulder portion 4a provided on the trigger bolt 4 is in contact with the door side plate 7.

Above the trigger bolt 4, a stopper 9 is pivotally attached to a pin 8 planted on the inner wall of the case 1,
It is biased clockwise by a spring (not shown).

The stopper 9 has a protrusion 9a on the lower side, and when the trigger bolt 4 retracts (moves to the right), the trigger bolt 4 contacts the protrusion 9a, and the stopper 9 rotates counterclockwise.

Above the stopper 9, a slider 10 having a recess 10a that engages with the stopper 9 is arranged.

As shown in FIGS. 6 and 7, the slider 10 is provided with a hole 11 having a bottom 11a in the longitudinal direction, a long hole 12 is formed at a right angle to the hole 11, and a protrusion 13 protruding on both side surfaces. Is projected.

 Then, the rack 14 is provided on the lower surface.

The protrusion 13 is fitted in a long hole 15 formed in the case 1, and a pin 16 implanted in the case is fitted in a long hole 12 of the slider 10.

Therefore, the slider 10 can slide in the left-right direction with respect to the case 1.

Between the bottom 11a of the hole 11 of the slider 10 and the pin 16, a spring 17
Is attached, and the slider 10 is urged to the right.

Reference numeral 18 is a cam plate pivotally mounted on the case 1 and rotated by a thumb turn or a key, and provided with a projection 19, a pinion 20 meshing with the rack 14, and a drive piece 21 on the outer circumference.

A pin 22 is fixed to the driving piece 21, and one end of a spring 23 is wound around the pin 22.

The other end of the spring 23 is a pin 24 provided on the inner surface of the case 1.
Is wound around.

25 dead bolts are inserted in the dead bolt insertion holes 3 of the case 1.
The shaft 26 whose both ends are protruded from the dead bolt 25 is loosely fitted in the long hole 27 provided in the case 1.

Therefore, the dead bolt 25 can slide in the left-right direction with respect to the case 1.

The dead bolt 25 has a concave groove 28 that engages with the drive piece 21, and a tapered portion 29 is formed at the opening-side end of the concave groove 28.

A step portion 30 is provided on the upper surface of the dead bolt 25, and a pin 31 fixed to the case 1 is provided above the step portion 30 and a guard lever.
32 are pivoted.

The guard lever 32, as shown in FIGS. 8 and 9,
It has a lever 33 having a corner portion 33a and a lever 34 projecting in a direction substantially opposite thereto, and a spring engaging groove 35 is formed on a side surface.

A spring 36 is fitted in the spring engagement groove 35 to hold the guard lever 32 in the neutral position shown in FIG.

Next, the operation of the automatic locking device configured as described above will be described.

In the door open state shown in FIG. 1, the trigger bolt 4 pressed by the spring 6 projects from the case 1, but the stopper 9 biased by the spring in the clockwise direction is engaged with the recess 10 a of the slider 10. .

In the cam plate 18 having the pinion 20 that meshes with the rack 14 of the slider 10, the drive piece 21 presses the concave groove 28 to the right side by the spring 23, and the dead bolt 25 is recessed in the case 1.

Next, when the hinged door D is closed, as shown in FIG.
The trigger bolt 4 contacts the striker S on the fixed frame side,
The stopper 9 is pushed into the case 1, the right side of the trigger bolt hits the protrusion 9a of the stopper 9, and the stopper 9 tilts counterclockwise against the spring biasing in the clockwise direction. Is disengaged, the slider starts to move to the right due to the pressing force of the spring 17, the cam plate 18 having the pinion 20 that meshes with the rack 14 starts rotating clockwise, and the drive piece 21 moves the dead bolt 25. Pressing to the left, the dead bolt 25 begins to enter into the fitting hole provided in the striker S.

Since the guard lever 32 receives no external force from anywhere, it is in the neutral position by the spring 36 and does not prevent the dead bolt 25 from moving to the left.

Thus, as shown in FIG. 3, the slider 10 is a spring.
The pressing force of 17 moves to the right until it stops against the inner wall surface of the case 1 and then stops. In conjunction with this, the cam plate 18 rotates clockwise and the driving piece 21 moves to the left, and the spring 23 moves to the left. Pressed on the edge.

The dead bolt 25 is pushed by the driving piece 21 and inserted into the fitting hole of the striker S, and the tip 34a of the lever 33 of the guard lever 32 tilted counterclockwise by pushing the lever 34 by the driving piece 21 is dead bolt. Since the dead bolt 25 is engaged with the stepped portion 30 of 25, the dead bolt 25 is locked in a locked state.

Therefore, only by closing the hinged door, the automatic locking by the powerful dead bolt is completed.

 Next, unlocking will be described.

When the cam plate 18 is rotated counterclockwise by a key or thumb turn, as shown in FIG. 4, the slider 10 having the rack 14 meshing with the pinion 20 starts to move to the left and the driving piece of the cam plate 18 is moved. Since 21 moves to the right and separates from the lever 34, the guard lever 32 is returned to the neutral position by the spring 36, and the tip of the lever 33 releases the engagement with the step portion 30 of the dead bolt 25.

Thus, the dead bolt 25, which can be moved to the right, starts moving to the right as the drive piece 21 moves to the right.

When the cam plate 18 further rotates counterclockwise, the recess 10a of the slider 10 comes over the stopper 9 and the stopper 9 biased clockwise by the spring is recessed, as shown in FIG. Enter the inside of 10a and lock the slider 10.

On the other hand, the dead bolt 25, which is pushed by the driving piece 21 and moves to the right side, sinks into the case 1.

 Thus, the automatic locking device is unlocked.

〔effect〕

 The present invention has the following effects.

(1) The automatic locking device has the advantage of not forgetting to lock the key and has the effect of preventing theft, and has the advantage of saving the trouble of using a key, etc. On the other hand, the conventional automatic locking device is only a latch fixing type or dead latch type. Although it has not been developed and there is a problem that the breaking strength is insufficient, according to the present invention, since it can be automatically locked with a dead bolt, the strength is increased and the reliability for locking is increased.

Further, since the cam plate has a function of retracting the dead bolt and a function of engaging the guard lever with the dead bolt in the protruding state, there is an advantage that the structure of the entire automatic locking device becomes simple.

(2) Since the present invention can be incorporated into the case of the conventional locking device, it is possible to use the same case, and the automatic locking device of the present invention can be used depending on the presence or absence of the trigger bolt. Can also be used as a locking device.

That is, since common parts can be used for both locking devices and compatibility can be provided, the manufacturing cost can be reduced.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention, FIG. 1 is a front view showing an unlocked state of an automatic locking device, FIG. 2 is a front view showing a locking start state of the same device, FIG. Is a front view showing a locked state of the same apparatus, FIG. 4 is a front view showing a unlocked state of the same apparatus, FIG. 5 is a front view showing a state before unlocking the same apparatus, and FIG. Front view, FIG. 7 is a side view of the same, FIG. 8 is a front view of a guard lever, and FIG. 9 is a bottom view of the same. D: hinged door, S ... striker, 1 ... case, 4
...... Trigger bolt, 5 ...... Spring holder, 6 ...... Spring, 8
...... Pin, 9 ...... Stopper, 9a ...... Protrusion, 10 ...... Slider, 10a ...... Concave, 14 ...... Rack, 16 ...... Pin, 1
7 …… Spring, 18 …… Cam plate, 19 …… Protrusion, 20 ……
Pinion, 21 …… Drive piece, 23 …… Spring, 25 …… Dead bolt, 28 …… Concave groove, 30 …… Step section, 32 …… Guard lever,
33,34 …… Lever, 36 …… Spring.

Claims (1)

(57) [Claims] 1. A dead plate that can be retracted from the front surface of a case is provided with a stepped portion, is rotatably provided on the case, and is attached to a cam plate that is biased by a spring to a locking angle and an unlocking angle. A drive piece to be engaged is provided, and a slider provided so as to be able to move forward and backward in the case is engaged with the cam plate, and is biased by a spring in a direction to drive the cam plate to a locking angle, and a front surface of the case is provided. Energize the trigger bolt that can appear more and more in the protruding direction,
A stopper is provided that is pivotally attached to the case, is urged in a direction to engage the slider in the forward position, and is pushed in a direction in which the trigger bolt is disengaged when the trigger bolt retracts. The guard lever to be mounted is provided with a lever that can be engaged with and disengaged from the step portion, and is biased by a spring to a position where the engagement with the step portion is released, and when the drive piece rotates to the locking angle, The automatic locking device, wherein the drive piece pushes the guard lever in a direction to engage the stepped portion.