JPH0581706B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a latch bolt that is engaged with a door frame side in conjunction with an operation of releasing a trigger bolt that locks the latch bolt of a lock in a temporarily tightened state. The present invention relates to a locking device that allows the door to be opened without turning a knob by remotely controlling the action of releasing the engagement from the door frame side.

[Prior art]

Conventionally, when a door is closed in a temporarily tightened state without locking with a deadbolt, the latchbolt in the case of the lock attached to the door side protrudes into the engagement hole of the strike on the door frame side and is engaged. The trigger bolt contacts the strike plate and is retracted into the lock case on the door side to lock the latch bolt, and also locks the outside knob to prevent it from turning.

By the way, if there is a resident in the room,
When a visitor calls out to a resident using an interphone, etc., the resident operates a switch to remotely activate the trigger bolt, causes the trigger bolt to protrude toward the door frame, releases the lock of the latch bolt, and then calls out to the resident. A locking device has been proposed in which the door can be opened by turning a knob, but in the above locking device, a device is installed on the door frame side to release the trigger bolt, allowing the occupant to open the door by remote control. Even if the outside knob is unlocked by releasing the trigger bolt, the visitor cannot open the door unless they turn the outside knob, which is inconvenient when the visitor's hands are occupied with luggage, etc. There was a certain drawback.

[Summary of the invention]

This invention was made in order to eliminate the above-mentioned drawbacks, and is linked to the operation of disengaging the trigger bolt that locks the latch bolt by remote control, so that the lock can be unlocked without turning the knob. The latch bolt, which is engaged with the strike on the door frame side, is pushed into the case of the lock on the door side from the outside so that the door can be opened simply by pushing the door. This invention will be explained below.

[Embodiments of the invention]

FIGS. 1a and 1b show an embodiment of the present invention, and are a partially cutaway front view and a side view, respectively. In these figures, denotes a locking part attached to the door side, and denotes a fixed part on the door frame side or wall side.

In the locking part, 1 is the case, 2 is the outer knob, 3 is the latch bolt, 4 is the trigger bolt, 5 is the keyhole, and 6 is the front. Note that there is an inner knob (not shown) at a position opposite to the outer knob 2. The latch bolt 3 is always projected by a first spring (not shown) and retracted by rotation of the outer knob 2 or the inner knob, and the trigger bolt 4 is constantly projected by a second spring (not shown) to close the door. When the latch bolt 3 is pulled into the case 1 and locked, the latch bolt 3 is configured to function in the same manner as a dead bolt.

In the fixed part, 7 is a strike, 8 is a through hole formed in the strike 7 and through which the latch bolt 3 goes in and out, 9 is a through hole through which the trigger bolt 4 goes in and out, and 10 is a control for controlling the trigger bolt 4 to go in and out of the case 1. The holding plate is formed into an L shape, and its corners are fixed integrally with a rotatable shaft 11. 12 is a step formed on the upper part of the presser plate 10; 13 is a bearing for the shaft 11; 14 is an engagement piece that engages with the step 12 of the presser plate 10; 15 is a guide for the engagement piece 14. A plate 16 is a first plunger fixed to the engagement piece 14 and the tip thereof, 17 is a first solenoid that moves the first plunger 16 and the engagement piece 14 up and down, and 18 is the latch bolt 3.
19 is a shaft into which the pressing tool 18 is rotatably fitted; 20 is a bearing for the shaft 19; 2;
Reference numeral 1 denotes an abutment piece that abuts against the lower surface 22 of the pressing tool 18. 23 is a second plunger to which the abutment piece 21 is fixed integrally; 24 is a second solenoid that moves the second plunger 23 and the abutment piece 21 up and down.

Next, the operation will be explained.

1a and 1b show a state in which a resident is in the room and the door is closed, and the first plunger 16 and the engaging piece 14 are lowered and engaged with the stepped portion 12 of the presser plate 10. Therefore, the presser plate 10 is fixed at the position shown by the solid line in FIG.

Therefore, even if the latch bolt 3 itself is pushed from the outside, it cannot be pushed into the case 1.

By the way, when the resident turns on the switch when the visitor calls to the resident using the interphone, the first solenoid 17 is activated and the first plunger 16 and the engaging piece 14 are pulled upward and the engaging piece is closed. 1
4 and the stepped portion 12 of the presser plate 10 is released, the presser plate 10 becomes free, and due to the return force of the trigger bolt 4 (which is constantly trying to protrude due to the spring), it is pushed into the door frame side. Protrusion, latch bolt 3
Since the lock is released, the latch bolt 3 can be pressed from the outside and pushed into the case 1. At this time, the presser plate 10 rotates clockwise to the position indicated by the two-dot chain line. Then the second
The solenoid 24 is activated and the second plunger 23
When the abutting piece 21 is raised, the abutting piece 21 slides and presses the lower surface of the pressing tool 18, so the pressing tool 18 presses the latch bolt 3 while rotating clockwise about the shaft 19. to the position indicated by the two-dot chain line to disengage from the door frame side, and then tighten the trigger bolt 4.
and push it into case 1. Latch bolt 3
By pushing the door into the case 1, the door can be opened, so the visitor can open the door simply by pushing the door. At this time,
The presser plate 10 rotates counterclockwise due to its own weight and returns to the position indicated by the solid line. Thereafter, the power to the first solenoid 17 is turned off, the first plunger 16 descends, and the engagement piece 14 engages with the stepped portion 12. Then, after the predetermined time has passed with the door openable, the second
The power to the solenoid 24 is turned off, the second plunger 23 is lowered, and the pressing tool 18 returns to the initial position indicated by the solid line.

Figure 2 is a diagram showing the circuit of the locking device in Figure 1.
Ry ₁₇ is a relay coil that operates the first solenoid 17, and Ry ₂₄ is a relay coil that operates the second solenoid 2.
4, P ₁ , P ₂ are + and - power terminals, S is the operating switch, Ry ₁ , Ry ₂ ,
Ry ₃ is the first, second, and third relay; y ₁ , y ₂ , and y ₃ are contacts operated by these; y ₂₄ is a contact that is turned off by the operation of the relay coil Ry ₂₄ ; Td ₁ , Td ₂
is a delay circuit, D ₁ and D ₂ are diodes, R ₁ to R ₄ are resistors, C ₁ and C ₂ are capacitors, and Tr ₁ to _{Tr 4} are amplification transistors.

Next, the operation will be explained.

When a resident turns on switch S, the first relay
Ry ₁ is actuated to close contact y ₁ and maintain itself, and relay coil Ry ₁₇ is energized to actuate first solenoid 17 . Then the first delay circuit
After a predetermined time determined by Td ₁ , the transistor Tr ₁ ,
Tr ₂ is actuated, thereby actuating the second relay Ry ₂ to close contact y ₂ and actuating relay coil Ry ₂₄ , which in turn causes solenoid 24 to operate.
After some time has elapsed since relay coil Ry ₂₄ operated,
Contact y ₂₄ is opened, relay coil Ry ₁₇ is opened, and solenoid 17 is restored. After the predetermined time determined by the delay circuit Td ₂ has elapsed after the contact y ₂ is closed,
Transistors Tr ₃ and Tr ₄ operate, and the third relay
Ry ₃ operates, turns off its contact y ₃ , and restores the entire system.

In the above embodiment, the first and second solenoids 17 and 24 are used to release the trigger bolt 4 and then press the latch bolt 3. The above operation may be performed by using only the solenoid 17 and performing two-step control using the difference in stroke.

〔Effect of the invention〕

As explained above, the present invention uses remote control to release the pressure on the trigger bolt in the temporarily tightened state so that it protrudes toward the door frame in the same way as the latch bolt, and then pushes the latch bolt into the door to connect the door and door frame. Since the engagement is released, even when the visitor's hands are occupied with luggage, the door can be opened by simply pushing the door without having to turn the outside knob. Additionally, even if the outside knob is locked from the inside using the push button on the inside knob, the door can be released from the door frame using the same action, so it can be used with conventional locks with some modification. It has the following advantages.

[Brief explanation of drawings]

1A and 1B are a partially cutaway front view and a partially cutaway side view showing an embodiment of the present invention, and FIG. 2 is a diagram showing a circuit of the locking device shown in FIG. 1. In the figure, 1 is the case, 2 is the outer knob, 3 is the latch bolt, 4 is the trigger bolt, 5 is the keyhole, 6 is the front, 7 is the strike, 8 and 9 are through holes, 10 is the holding plate, and 11 and 19 are the shafts. , 13, 20 are bearings, 12
14 is a step, 14 is an engagement piece, 15 is a guide plate, 16 is a first plunger, 17 is a first solenoid, 1
8 is a pressing tool, 21 is an abutting piece, 22 is a lower surface, 23 is a second plunger, and 24 is a second solenoid.

Claims (1)

[Claims] 1 A latch bolt that is constantly projected from the case by a first spring and retracted by pressure from the outside or rotation of a knob, and a latch bolt that is constantly projected from the case by a second spring and is pushed in by pressure from the outside. When the door is closed, the latch bolt is fitted into a locking portion including a trigger bolt that locks the latch bolt in a state where it protrudes from the case by engaging with the latch bolt when the door is closed. In the lock device, the strike has a through hole formed therein and a fixed part attached to the door frame side, and the strike on the door frame side has a through hole through which the trigger bolt enters and exits, and the trigger bolt A rotatable holding plate is provided which rotates to abut the trigger bolt at a position opposite to the latch bolt, and a rotatable presser plate which rotates and abuts the latch bolt is provided at a position facing the latch bolt. , a first solenoid is provided for holding the presser plate in a position to press the trigger bolt toward the door by pressing the presser plate via an engagement piece that is movable up and down; After the trigger bolt is released from being held by the striker and protrudes into the through hole of the strike, the latch bolt is pushed into the case by the pressing tool via the vertically movable abutting piece, and the door and the door frame are pressed together. A locking device characterized in that a second solenoid is provided for releasing the engagement with the locking device.