JPH0752908Y2 - Electric locks for doors - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention keeps the deadbolt in an unlockable state by inserting a password from the outside of the door,
The present invention relates to an electric lock for a door that is unlocked and reset to a locked state by operating a thumb-turn operation either outdoors or indoors.

[Conventional technology]

Regarding the electric lock for the door in which the dead bolt can be immersed by inserting the personal identification number from the outside of the door, the conventional techniques described in JP-A-61-113975 and JP-A-63-67386, etc. There is.

The electric lock described in JP-A-63-67386 is shown in FIGS.
As shown in the figure, the solenoid 2 installed inside the outdoor escutcheon 1 has a plunger 4 that is attracted into the solenoid 2 and rises against the spring 3 by energization, and is fixed to the tip of the plunger 4. The L-shaped locking plate 5 has upper and lower engaging holes 5a and 5b on its side surface, and an engaging portion 6 is provided on its lower end.

On one side of the locking plate 5, one end of a flexible stopper plate 8 is fixed to a pin 7 provided on the outdoor escutcheon 1, and a locking claw 8a at the tip abuts on the locking plate 5.

Then, when the plunger 4 is sucked up, the locking claw 8a, which was engaged in the upper locking hole 5a, is engaged in the lower locking hole 5b.

As shown in FIG. 11, a rotation restrictor 10 is inserted into the inner peripheral surface of a thumb turn 9 rotatably provided on the escutcheon 1 on the outdoor side, and the rotation restrictor 10 is bored. Bottomed hole 11
The spring 12 and the steel ball 13 are inserted into the
13 is in pressure contact with the inner peripheral surface of the thumb turn 9, and functions as a friction clutch.

On the upper part of the rotation restrictor 10, the engaging concave portion into which the engaging portion 6 is fitted and removed.
14 is formed, and a pushing protrusion 15 is provided on the side portion.

Then, as shown in FIG. 9, when the electric lock for the door is locked, the solenoid 2 is energized by the secret code input from the outside of the door, and the plunger 4 rises against the spring 3 (10th position). (See the drawing), the engaging portion 6 is disengaged from the engaging concave portion 14 and the rotation restrictor 10 is in a rotatable and unlockable state, and the locking claw 8a is engaged with the lower locking hole 5b. Is held in an unlockable state.

Next, when the thumb turn 9 on the outdoor side is operated in the unlocking direction,
The rotation restrictor 10 rotates together with the thumb turn 9, and a dead bolt (not shown) is retracted to unlock the door.
By the rotation of the rotation restrictor 10, the pushing protrusion 15 pushes the stopper plate 8, and the locking claw 8a is disengaged from the locking hole 5b.
It is reset to the locked state shown in the figure.

When the unlocking operation is performed by the indoor side thumb turn, when the indoor side thumb turn is rotated, the spindle 15 connected to the thumb turn is rotated and the door is unlocked, but at this time, the rotation restrictor 10 is stopped. As it is, the locked state is not reset.

[Problems to be solved by the device]

When the electric lock for the door is locked, the thumb turn outside the room is restricted by the solenoid, so it cannot be operated.
The thumb turn can be operated from the indoor side regardless of the locked / unlocked state.

Therefore, the movement of the spindle due to this indoor operation is
It does not reach the outdoor Samturn.

In such a structure, when the lock is locked, the password is entered from the outside of the room to activate the solenoid, and when the unlocked state is maintained (the thumb turn on the outside of the room becomes rotatable), it happens that the inside of the room is locked. A person may operate the thumb turn inside the room to unlock it.

At this time, an outdoor person can open the door without operating the outdoor thumb turn, so the outdoor thumb turn does not work even if you enter the room and lock the indoor thumb turn, so the solenoid plunger is unlocked. It remains held enabled.

Therefore, in such a state, there is a risk that the person outside the room can freely operate the outdoor side thumb turn at any time to unlock and illegally enter without entering the personal identification number.

The present invention is intended to solve such a problem, and when a personal identification number is input from the outside, even if the unlocking operation accidentally overlaps from the inside, the locked state is reliably reset. The electric lock for doors is provided.

[Means for Solving the Problems]

In order to achieve the above object, the electric lock for a door of the present invention comprises:
A solenoid provided inside the outdoor escutcheon to be attached to the door, for operating the plunger by energization, a locking plate fixed to the plunger, having a locking hole and an engaging portion, and a tip pivotally attached to the outdoor escutcheon. The locking claw is urged in the direction of the locking plate to engage with the locking hole when the solenoid operates, and the stopper plate is rotatably provided on the outdoor escutcheon. An outdoor side thumb turn having a pushing protrusion that pushes in a direction opposite to the bias, an engaging recess into which the engaging portion fits when the solenoid is not operating, and an engaging protrusion formed at an end portion,
An indoor-side thumb turn that is rotatable to the indoor-side escutcheon, and a spindle that is coupled to the indoor-side thumb turn and that has an engaged portion that engages with the unlocking direction rotation of the engaging protrusion;
And a cam plate which is fixed to the spindle and has a protrusion that pushes the stopper plate in the opposite direction by the rotation of the spindle.

[Action]

The operation of the electric door lock configured as described above is as follows.

(Locked state) Since the solenoid is not energized, the plunger is in the non-actuated position, and the engaging portion of the locking plate is fitted in the engaging recess of the outdoor side thumb turn.

Therefore, since the outdoor thumb turn is restrained by the locking plate, the outdoor thumb turn cannot be rotated in the unlocking direction.

(Unlocking from the outdoor side) When the solenoid is energized, the plunger operates and the engaging part of the locking plate disengages from the engaging recess of the outdoor side thumb turn, and the outdoor side thumb turn becomes rotatable and unlockable. At the same time, the locking claw is engaged with the locking hole, and the locking plate is held in the unlockable state even after the energization of the solenoid is stopped.

Next, when the outdoor thumb turn is rotated in the unlocking direction, the engaging protrusion of the outdoor thumb turn rotates the engaged protrusion of the spindle in the unlocking direction, and the spindle rotates to unlock the electric lock. At the same time, the pushing protrusion of the outdoor side thumb turn pushes the stopper plate in the opposite direction, pushing the locking claw out of the locking hole and resetting the locking plate to the locked state.

(Unlocking from the indoor side) When the indoor thumb turn is rotated in the unlocking direction, the spindle rotates and the electric lock is unlocked, but at this time the solenoid does not operate, so the engagement part of the locking plate The outdoor thumb turn remains engaged with the engaging recess of the outdoor thumb turn and does not rotate.

For some reason, if the solenoid is energized just before the unlocking operation from the indoor side, the locking plate is held in the unlockable state, but when the spindle rotates due to the unlocking operation from the indoor side. The projection of the cam plate pushes the stopper plate in the opposite direction of the biasing force, the locking claw disengages from the locking hole, and the locking plate is reset to the locked state.

〔Example〕

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

The same parts as those in the conventional example are designated by the same reference numerals.

FIG. 6 is a side view of the electric door lock attached to the end of the door. The outdoor escutcheon 1 is attached to the outside of the door D, and the indoor escutcheon 17 is attached to the inside of the door D.

As shown in FIG. 7, on the surface of the outdoor escutcheon 1, a numeric keypad switch 18 for inputting a personal identification number, a cylinder lock 19 used for mechanical unlocking, a thumb turn 9 on the outdoor side, and a latch bolt are provided. A lever 20 for operation is provided.

On the surface of the indoor escutcheon 17, as shown in FIG. 8, an indoor thumb turn 21 and a latch bolt operating lever handle 22 are provided.

As shown in FIG. 5, a cylindrical portion 23 having a through hole 23a is provided on the back surface of the outdoor escutcheon 1, and the outdoor thumb turn 9 is rotatably fitted in the through hole 23a. It is prevented from coming off by a cover 24 attached to the surface of the escutcheon 1.

A screw hole 25 is screwed into the outdoor escutcheon 1, a hole 26a is bored in a supporting member 26 for supporting the solenoid 2, and a hole 26a
27 is inserted into the screw hole 25 and the solenoid 2
Is fixed to the outdoor escutcheon 1.

The plunger 4 of the solenoid 2 is urged downward by the spring 3, and when the personal identification number is input to the ten-key switch 18, the solenoid 2 is energized and the plunger 4 is moved to the solenoid 2
Is sucked into and operates upward.

A substantially L-shaped locking plate 5 is fixed to the lower end of the plunger 4.

The locking plate 5 is provided with a locking hole 5a and a cutout recess 28 on its side surface, and an engaging portion 6 is projectingly provided on its lower end.

A rotary cam provided on the rotor of the cylinder lock 19 engages with the notch recess 28, and when the key inserted into the cylinder lock 19 is rotated in the unlocking direction, the rotary cam rotates to lock the locking plate 5. The electric lock for the door can be mechanically unlocked from the outdoor side.

A stopper plate 8 is pivotally attached to a pin 7 provided on the outdoor escutcheon 1, and the stopper plate 8 is a spring.
When the locking claw 8a at the tip is urged by the 29 in the direction of contacting the locking plate 5 and the locking plate 5 is lifted by the energization of the solenoid 2 and the engaging portion 6 is disengaged from the engaging concave portion 14, The pawl 8a is engaged with the locking hole 5a.

The spring 30 is wound around the small-diameter portion 9a of the outdoor side thumb turn 9, and the bent both ends 30a of the spring 30 project from the arc-shaped projection 23b projecting on the end face of the tubular portion 23 and the end face of the outdoor side thumb turn 9. It is hung on both end edges of the arc-shaped engaging projection 9b provided.

Therefore, the outdoor side thumb turn 9 is biased to the neutral position where the engagement protrusion 9b overlaps the arcuate protrusion 23b of the tubular portion 23, and the engagement protrusion 9b
The pushing protrusion 15 provided on the opposite side of b is close to the curved portion 8c of the stopper plate 8 (see FIG. 1).

In the outdoor escutcheon 1, screw holes 31 are screwed on both sides of the cylindrical portion 23, and the male screw portion 32a of the screw guide 32 passes through a hole 34 provided in the back plate 33 and is screwed into the screw hole 31.

Therefore, the back plate 33 is fixed to the outdoor escutcheon 1.

A hole 35 is provided between both holes 34 of the pack plate 33, and the hole 35
An angular shaft-shaped spindle 16 connected to the indoor side thumb-turn 21 is rotatably inserted in this.

The spindle 16 includes an arcuate engaged portion 36a and an engaged portion 36a.
A cam 36 having a projection 36b projecting from the tip of the is fixed.

When the spindle 16 is in the locked state, as shown in FIG. 1, the engaged portion 36a and the projection 36b are at an angle directed obliquely downward, and one end surface of the engaged portion 36a is an end surface of the engaging projection 9b. Although they are in contact with each other, when the indoor side thumb turn 21 is rotated in the unlocking direction, the spindle 16 moves about 90 ° counterclockwise in FIG.
When rotated, the engaged portion 36a and the protrusion 36b have an angle directed obliquely upward, and the other end surface of the engaged portion 36a comes into contact with the end surface of the engaging protrusion 9b.

A pin 37 is provided in the vicinity of the arc-shaped projection 23b, and the pin 37 has a pair of restriction plates 38 and 3 having restriction claws 38a, 39a at one end.
The other end of 9 is pivotally attached, and the pair of restriction plates 38 and 39 are
The springs 8a and 39a are biased toward each other, and
The a and 39a regulate the angle of the cam 36.

Next, the operation of the electric lock configured as described above will be described.

(Locked state) Since the solenoid 2 is not energized, the plunger 4 is in a non-actuated position pushed downward by the spring 3, and the engagement portion 6 of the locking plate 5 is engaged with the engagement concave portion 14 of the outdoor side thumb turn 9. , And the outdoor side thumb turn 9 cannot rotate.

It is not possible to rotate the outdoor thumb turn in the unlocking direction.

The outdoor side thumb turn 9 is located at a position where the engaging projection 9b overlaps the arcuate projection 23b, and the pushing projection 15 is the stopper plate 8.
Is close to the curved portion 8c.

The cam 36 of the spindle 16 is at an angle such that the engaged portion 36a and the protrusion 36b are directed obliquely downward (see FIG. 1).

(Unlocking from the outdoor side) When the personal identification number is entered from the outdoor side by the ten-key switch 18, the solenoid 2 is energized to move the plunger 4 upward, and the engaging portion 6 of the locking plate 5 engages with the outdoor side thumb turn 9. When the outdoor side thumb turn 9 is released from the fitting recess 14 and is in a rotatable and unlockable state, the locking claw 8a is inserted into the locking hole 5a of the locking plate 5, and the energization of the solenoid 2 is stopped. Even after the locking, the locking plate 5 is held in the unlockable state (see FIG. 2).

Next, when the outdoor side thumb turn 9 is rotated in the unlocking direction, the engagement protrusion 9b of the outdoor side thumb turn 9 is rotated counterclockwise in FIG. 1, and the engaged protrusion 36a of the cam 36 is moved in the same direction. When pushed, the spindle 16 rotates in the unlocking direction, the dead bolt inside the electric lock sinks and the electric lock is unlocked, and the pushing projection 15 of the outdoor side thumb turn 9 biases the stopper plate 8. By pushing in the opposite direction, the locking claw 8a is disengaged from the locking hole 5a, and the locking plate 8 is pushed by the spring 3 and descends downward.
The engagement part 6 is engaged in the engagement recess 14 of the outdoor side thumb turn 9, and the electric lock is reset to the locked state.

(Unlocking from Indoor Side) When the indoor thumb turn 21 is rotated in the unlocking direction which is the counterclockwise direction, the spindle 16 is rotated and the electric lock is unlocked.

At this time, since the solenoid 2 does not operate, the engaging portion 6 of the locking plate 5 remains engaged in the engaging recess 14 of the outdoor thumb turn 9, and the outdoor thumb turn 9 does not rotate (see FIG. 3).

For some reason, when the solenoid 2 is energized just before the unlocking operation from the indoor side, the locking plate 5 is held in the unlockable state, but the spindle 16 is rotated by the unlocking operation by the indoor side thumb turn 21. Cam 36 when moved
The projection 36b pushes the stopper plate 8 in the direction opposite to the biasing force, the locking claw 8a is disengaged from the locking hole 5a, and the locking plate 5 is reset to the locked state.

Further, when the solenoid 2 is energized immediately after the unlocking operation from the indoor side and the door is opened as it is, as shown in FIG. 4, the protrusion 36b of the cam 36 is positioned diagonally above and the locking plate is placed. 5 rises and the locking claw 8a is engaged in the locking hole 5a and is not reset to the locked state (see FIG. 4), but when the indoor side thumb turn 21 is rotated clockwise, which is the locking direction. The projection 36b of the cam 36 pushes the stopper plate 8 in the opposite direction, and the locking claw 8a is disengaged from the locking hole 5a, and the locking plate 5 is reset to the locked state.

[Effect of device]

Since the present invention is configured as described above, there is no fear that the electric lock will not return to the locked state even if the energization performed from the outdoor side and the unlocking operation of the thumb turn on the indoor side are performed almost at the same time. .

[Brief description of drawings]

1 to 8 show an embodiment of the present invention, FIG. 1 is a front view of a main part of a locked electric lock for a door, and FIG. 2 is a schematic view of an electric lock for a door unlocked from the outside. Front view, Fig. 3 is a front view of the main part of the electric lock for the door unlocked from the indoor side, and Fig. 4 is a main part of the electric lock for the door when the unlocking of the indoor side and the energization of the solenoid overlap. Front view, FIG. 5 is a perspective view of the components of the electric lock for the door, FIG. 6 is a side view of the electric lock for the door attached to the door, and FIG. 7 is a front view of the electric lock for the door as seen from the outside. Fig. 8 is a front view of an electric lock for a door as seen from the inside, Fig. 9 is a front view of a main portion showing a locked state of a conventional electric lock for a door, and Fig. 10 is a front view of an electric lock for a conventional door. FIG. 11 is a vertical cross-sectional view of FIG. 9 showing an essential part front view showing an unlocked state. 1 ... outdoor escutcheon, 2 ... solenoid, 3 ... spring, 4 ... plunger, 5 ... locking plate, 5a ... locking hole, 6 ... engaging part, 8 ... stopper plate, 9 ... outdoor side thumb turn, 9b ... engaging Projection, 14 ... Engagement recess, 15 ... Pushing projection, 16 ... Spindle, 21 ... Indoor side thumb turn, 23 ... Cylindrical part, 23b ... Arc-shaped projection, 36 ... Cam, 36a ... Engaged part, 36b
… Protrusions.

Claims (1)

[Scope of utility model registration request] Claims: 1. A solenoid provided inside an outdoor escutcheon to be attached to a door for operating a plunger when energized, a locking plate fixed to the plunger and having a locking hole and an engaging portion, and the outdoor escutcheon. A stopper plate that is pivotally attached to the stopper plate that is urged toward the locking plate and that engages with the locking hole when the solenoid is actuated; An outdoor side thumb turn having a pushing protrusion that pushes the stopper plate in the opposite direction to the bias, an engaging recess into which the engaging portion fits when the solenoid is not operating, and an engaging protrusion formed at the end. , An indoor side thumb turn rotatable to the indoor side escutcheon, and an unlocking direction rotation of the engagement protrusion connected to the indoor side thumb turn. And a cam plate fixed to the spindle and having a protrusion for pushing the stopper plate in the opposite direction to urge the stopper plate in the opposite direction by the rotation of the spindle. Electric lock for doors.