JP2001073614A - Automatic locking device for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic locking device for a door capable of easily insuring safety and surely and automatically operating. SOLUTION: This automatic locking device for the door is provided with a latch 30 provided on a door frame 20, a lock arm 36 provided on the door 21, a lock arm drive mechanism 40 swinging the lock arm 36, a lock sensor 61 and an unlock sensor 62 respectively detecting the lock and unlock conditions of the lock arm 36, a door sensor 64 detecting the opening/closing condition of a door 21, a buzzer 65 informing the half-opened condition of the door 21, a key input means 66 provided inside the door 21 and inputting the unlock command of the lock arm 36, and a control device 50 sending a signal making the lock arm 36 into the unlocked condition and making the lock arm 36 into the locked condition when the door 21 is moved from the opened condition to the closed condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door lock device that automatically locks a door to a half-open state when a door of a front door of a house or office is closed.

[0002]

2. Description of the Related Art Conventionally, door lock devices have been used for entrance doors and the like in which the door is only opened to a half-open state without locking the security door. The configuration includes, for example, a latch provided on a door frame, and a lock arm that is swingably attached to the door via a pivot pin and is engageable with the latch. If the lock arm is engaged with the latch while the door is closed, even if the door is opened from the outside of the door, the lock arm engages with the latch and the door is opened only to the half-open state. After confirming safety in this state, once the door is closed and the lock arm is removed from the latch, the door can be opened to the fully opened state. A half-open state, comprising: a chain having one end fixed to the door frame and having a latch at the other end; and a latch attached to the door and engaged with the latch when the door is opened to lock the latch. So that you can open it up. Also in this case, similarly, if the latch is removed from the latch with the door closed from the inside, the door can be opened to the fully opened state.

[0003]

However, in the above-described conventional method, there are cases where the operator forgets to operate the lock arm or the chain, or when the operation is troublesome and the door lock device is not used, so that safety cannot be ensured. . In particular, there is a problem that it is difficult for children and the elderly and physically handicapped to operate the door lock device, and safety cannot be ensured. The present invention has been made in view of such circumstances, and an object of the present invention is to provide an automatic door lock device that can easily secure safety and reliably prevent a closed room from being automatically provided.

[0004]

According to the first aspect of the present invention, there is provided an automatic door lock apparatus, comprising: a latch provided on a door frame having an openable and closable door; An auto-locking device for a door, comprising a lock arm movably mounted and engageable with a latch, the lock arm driving mechanism for swinging the lock arm, and the locking and unlocking states of the lock arm are respectively detected. A lock sensor and an unlock sensor, a door sensor for detecting the open / closed state of the door, a buzzer for notifying that the lock arm is locked and the door is half open according to the outputs of the lock sensor and the door sensor; Key input means provided inside to input an unlock command to unlock the lock arm by at least one of an ON-OFF signal and a password; Predetermined signal and the door sensor sends a signal to the lock arm to check the signals which detects the closed state of the door to unlock state to the lock arm driving mechanism from,
Further, the control device includes a control device that checks a signal from a door sensor that operates when the door is closed from an open state, and sends a signal to the lock arm driving mechanism to lock the lock arm.

Thus, if the door is opened from the outside (or inside) while the lock arm is in the locked state, the door is opened only to the half-open state, and the buzzer sounds. In this state, a signal for instructing a predetermined unlocking such as a personal identification number is sent to the control device from key input means provided inside the door. Therefore, once the door is closed, a signal from the door sensor that detects the closed state of the door is sent to the control device, the signal that detects the closed state of the door is checked, the buzzer is stopped, and the lock arm drive mechanism is stopped. To release the lock arm. In this state, the door can be opened. When the door is closed, a signal from the door sensor is sent to the control device, and the lock arm can automatically return to the locked state.

Here, the lock arm drive mechanism is provided in a one-way rotary motor, a rotary plate fixed to the output shaft of the one-way rotary motor, a crankpin eccentrically provided on the rotary plate, and an intermediate portion of the lock arm. A connecting pin and a connecting bar having both ends rotatably connected to the connecting pin and the crank pin may be provided. In this case, the lock arm can be alternately switched between the locked state and the unlocked state each time the rotating plate rotates half a turn. Therefore, the configuration of the control device can be simplified by using a one-way rotation motor. A mechanism can be formed. Further, the lock arm drive mechanism may include a reversible rotation motor and a rotation pin fixed to an end of the lock arm, and directly connect the rotation pin and an output shaft of the reversible rotation motor. In this case, since the lock arm is directly connected to the output shaft of the reversible rotary motor, the mechanical configuration is simplified.

According to a second aspect of the present invention, there is provided a door auto-locking device according to a second aspect of the present invention, wherein one end is fixed to a door frame having an openable and closable door, and the other end is provided with a latch as a stopper; A locking device for a door, comprising: a locking portion that can lock a latch when the door is closed, wherein the locking portion covers a groove fixed to the door, and the groove can be opened and closed to form an L-shaped tip. It has a bent sliding arm and locks and retracts by moving the sliding arm back and forth.
A lock mechanism that can unlock, a door sensor that detects opening and closing of the door, a lock sensor and unlock sensor that detects the movement of the sliding arm, and a sliding arm that locks according to the output of the lock sensor and the door sensor A buzzer that indicates that the door is in the half-open state and a unlock command that is provided inside the door to unlock the sliding arm ON-OFF
Key input means for inputting at least one of a signal and a password, and a predetermined signal from the key input means and a signal for unlocking the sliding arm by confirming a signal that the door sensor detects a closed state of the door. Sent to the lock mechanism,
A control device that checks a signal from a door sensor that operates when the door is closed from an open state and sends a signal to the lock mechanism to lock the sliding arm.

Thus, if the door is to be opened from the outside (or inside) while the sliding arm is in the locked state, the door is opened only to the half-open state, and a buzzer is generated in that state.
In this state, a person outside (or inside) the door inputs a predetermined unlocking signal such as a personal identification number to key input means installed inside the door by keying, and a signal for unlocking is output to the control device. To stop the buzzer. Once the door is closed, the sliding arm is unlocked by the lock mechanism in response to a confirmation signal indicating that the door has been closed. In this state, the door can be opened. When the door is closed, a signal from the door sensor is sent to the control device, and the sliding arm can be automatically locked. In addition,
If the door is not opened even after the unlocked state has passed for a predetermined time, it is possible to automatically return to the locked state. Here, the latch may be provided with a number key so that the chain can be detached by disassembly. In this case, in case of emergency, a person who does not know the password of the key input means, such as a manager of a building or apartment, operates the number key from the gap of the half-open door to remove the latch from the chain,
The door can be freely opened and closed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a front view showing a configuration of an automatic door lock device according to a first embodiment of the present invention, FIG. 2 is a flowchart showing an unlocking operation of the automatic door lock device, and FIG. FIG. 4 is a side view showing the vicinity of the lock arm of the automatic lock device in the state, FIG. 4 is a plan view showing the locked state of the automatic lock device, FIG. 5 is a plan view showing the unlocked state of the automatic lock device, and FIG. Is a flowchart showing the locking operation of the automatic lock device, FIG. 7 is a front view showing the configuration of the door automatic lock device according to the second embodiment of the present invention, and FIGS. FIG. 9 is a front view, a plan view, and FIG. 9 showing a configuration of a door lock arm device according to a third embodiment of the present invention. FIG. 9 is a configuration of a lock arm of an automatic door lock device according to a fourth embodiment of the present invention. FIG. 10 (A) B), (C) is the locked state of each the automatic locking device, the half-open state of the door is a plan view showing the unlocked state.

As shown in FIG. 1, a door auto-lock device 10 according to a first embodiment of the present invention
, A neck 32 protruding from the base 31, and a head 33 provided at an end of the neck 32
Is provided. An openable / closable door 21 is provided inside the door frame 20, and a lock arm 36 is attached to the door 21 so as to be swingable via a pivot pin 35 supported by a bracket 34. The lock arm 36
An insertion portion 37 into which the head 33 of the latch 30 can be inserted at the base
And a sliding portion 38 in the form of a long hole extending along the longitudinal direction of the lock arm 36 with which the neck portion 32 slides in communication with the insertion portion 37 and the head 33 can engage. Therefore, with the door 21 closed, the lock arm 36 is
When it is made substantially parallel to the surface 1, the latch 30 is not engaged with the sliding portion 38, but is inserted into the insertion portion 37, and the lock arm 36 is unlocked. When the lock arm 36 is tilted about the rotation pin 35 and raised in the direction perpendicular to the door 21, the lock arm 36 is locked,
When the door 21 is opened, the head portion 33 is engaged with the lock arm 36, and is in a half-open state.

The door 21 is provided with a lock arm drive mechanism 40 for swinging the lock arm 36. The lock arm drive mechanism 40 includes a one-way rotation motor 42 including a speed reducer 41, a rotation plate 44 fixed to an output shaft 43 of the one-way rotation motor 42, a crank pin 45 eccentrically provided on the rotation plate 44, A connection pin 46 provided on a side surface of an intermediate portion of the lock arm 36, and a connection bar 47 having both ends rotatably connected to the connection pin 46 and the crank pin 45, respectively. A projection 48 is provided on a part of the rotation plate 44 near the outer periphery. An unlock switch 49 is provided on the door 21 and the lock arm 36 is forcibly unlocked by driving the one-way rotation motor 42 with the power of a power source 51 composed of, for example, a battery via the control device 50. I am trying to do it. Lock arm drive mechanism 40
The power supply 51 is connected to the one-way rotation motor 42 driven by the control device 50 to drive the one-way rotation motor 42.

The door 21 is provided with a lock sensor 61 and an unlock sensor 62 for detecting the approach of the projection 48 to detect the locked and unlocked state of the lock arm 36, respectively. The door frame 20 is provided with a magnet 63 made of, for example, a magnetic material, and the door 21 is provided with a door sensor 64 made of a magnet sensor for detecting the open / closed state of the door 21 in accordance with the distance from the magnet 63. The lock arm 36 is locked to the door 21 in accordance with the outputs of the lock sensor 61 and the door sensor 64 and the door 21 is locked.
Is provided with a buzzer 65 for notifying that is in a half-open state. Further, a lock arm 36 is locked inside the door 21.
A key input means 66 including a switch key 661 for generating an ON-OFF signal for unlocking and a count key 662 capable of inputting a password for unlocking the lock arm 36 is provided. The count key 662 of the key input means 66 sets, for example, a four-digit password, and enables input of an unlocking command for putting the lock arm 36 into an unlocked state by inputting the password. A control device 50 composed of, for example, a one-chip microcomputer is provided in the vicinity of the lock arm driving mechanism 40, and a buzzer 65 is provided by an output of detecting an open state of the door sensor 64 and an output of the lock sensor 61.
When the unlocking command signal is received from the key input means 66 and the signal that the door sensor 64 detects the closed state of the door 21 is confirmed, the lock arm 36 is unlocked. A signal is sent to the lock arm drive mechanism 40 to drive the one-way rotation motor 42. Further, the control device 50 tilts the lock arm 36 to the unlocked state, and when confirming the signal of the door sensor 64 that operates when the door 21 is closed from the open state, the signal for setting the lock arm 36 to the locked state. Is sent to the lock arm drive mechanism 40 to drive the one-way rotation motor 42 to lock the lock arm 36.

Here, the unlocking operation of the automatic door lock device 10 according to the present embodiment will be described with reference to the flowchart shown in FIG. (1) As shown in FIGS. 3 and 4, when the lock arm 36 is engaged with the latch 30 and the door 21 is opened from the outside (or inside) in a locked state, the latch 30 slides on the lock arm 36. Because it can move only the length of the part 38,
The door 21 opens only up to the half-open state (step 1). (2) In this state, a signal indicating that the door 21 is open by the door sensor 64 (ON) is output, and the lock sensor 61 (ON) outputs a signal indicating the lock state when the protrusion 48 is detected (step). 2). (3) By sending the output of the door sensor 64 and the output of the locking sensor 61 to the control device 50, the buzzer 65 for notifying the half-open state is sounded. Here, a person outside (or inside) from the inside (or outside) of the door can be confirmed (step 3). (4) At this time, if the state is safe, the door is closed once (step 4). (5) An unlock signal is sent to the controller 50 from the inside of the door by inputting an OFF signal from the switch key 661 of the key input means 66 or from the outside of the door by inputting a password using the count key 662. (Step 5). (6) The door 21 is closed by the door sensor 64 (O
FF) is output (step 6). (7) The buzzer 65 is stopped with the door 21 closed (Step 7). (8) The control device 50 sends a signal for unlocking the lock arm 36 to the lock arm drive mechanism 40 based on a signal indicating that the door 21 is closed and an unlock command signal, and drives the one-way rotation motor 42 ( Step 8). (9) As shown in FIG. 5, the lock arm 36 is unlocked, the rotary plate 44 is rotated by approximately 180 °, and the unlock sensor 62 detects the protrusion 48 provided on the rotary plate 44 to detect a detection signal. Is sent to the control device 50 (step 9). (10) The one-way rotation motor 42 is stopped, and the door can be opened (step 10). (11) If the door 21 is not operated to be opened after a certain period of time in the unlocked state, the lock arm drive mechanism 40 is operated by the closed state (OFF) of the door sensor 64 and the timer in the control device 50. Then, the lock arm 36 is automatically brought into the locked state (step 11). In addition, FIG.
In FIG. 5, a lock sensor 61, an unlock sensor 62
The projection 48 provided on the rotating plate 44 for convenience is substantially 180
3 shows a state in which the lock arm 33, the connecting bar 47, and the crankpin 45 change the locked / unlocked state of the lock arm 36, so that the lock sensor 61, the unlock sensor Reference numeral 62 indicates that the mounting position can be changed.

Next, the locking operation when the door 21 is closed will be described with reference to the flowchart shown in FIG. (1) Close the door 21 (step 1). (2) The door sensor 64 is turned off, and a signal indicating that the door 21 has changed from the open state to the closed state is sent to the control device 50 (step 2). (3) The control device 50 sends a signal to the lock arm drive mechanism 40 to lock the lock arm 36, and the one-way rotation motor 42 is driven (step 3). (4) The lock arm 36 is tilted, and the protrusion 48 provided on the rotary plate 44 corresponds to the lock sensor 61 from the position corresponding to the unlock sensor 62, and the output signal of the lock sensor 61 is output to the control device 50. (Step 4). (5) One-way rotating motor 42 according to a command from control device 50
Stops, and the lock arm 36 can be automatically locked (step 5). When an inside person goes out, when the door 21 is closed, the lock arm 36 is automatically turned off.
Is locked. When the person who has gone home comes home and puts his hand inside the door 21 with the door half-opened, the key input means 66
, The door 21 is closed once, the unlocking command signal is sent to the control device 50 to unlock the lock arm 36, and the door 21 can be opened. When the door auto-locking device 10 is not used, a preset special number may be input by key to maintain a continuous unlocking state, or the power supply 51 may be turned off. Further, since a battery is used for the power supply 51, no external wiring is required, and the installation of the door auto-lock device 10 is simple.

As shown in FIG. 7, a door auto-lock device 11 according to a second embodiment of the present invention includes a lock arm driving mechanism 40 of the door auto-lock device 10 according to the first embodiment. Instead, a reversible rotation motor 420 having a built-in reduction gear 410, a rotation pin 350 pivotally supported by a bracket 340, a lock arm 360 having an end fixed to the rotation pin 350 and capable of engaging with the latch 30; Rotating pin 3
The lock arm drive mechanism 400 in which the output shaft 430 of the reversible rotary motor 420 is directly connected to the motor 50 is used. Accordingly, a projection 480 is provided on the output shaft 430, and the lock arm 360 is provided.
, The lock sensor 61 and the unlock sensor 62 detect the protrusion 480 in the locked state and the unlocked state, respectively. The control device 500 that controls the reversible rotation motor 420 includes a polarity reversing mechanism in which the polarity of the reversible rotation motor 420 is reversed by the output signals of the locking sensor 61 and the unlocking sensor 62 to rotate in reverse. Other components are the same as those of the door auto-locking device 10 according to the first embodiment, and therefore, will be described using the same reference numerals described in FIG.

In this case, the operation of the door automatic lock device 11 is almost the same as that of the automatic lock device 10 according to the first embodiment (see the flowchart of FIG. 2).
However, when the lock arm drive mechanism 400 is stopped,
Can be opened, the reversible rotation motor 420 is set in a state where the reversible rotation motor 420 can be reversed by the polarity reversing mechanism of the control device 500, and the apparatus stands by in a state where the reversible rotation motor 420 is reversed when the door 21 is closed. When the door 21 is closed, when a signal indicating that the door sensor 64 is closed is sent to the control device 500, the reversible rotary motor 420 is driven in a direction opposite to that in which the reversing motor 420 is unlocked.
0 corresponds to the lock sensor 61 from the position corresponding to the unlock sensor 62, the output signal of the lock sensor 61 is output to the control device 500, and the reversible rotation motor 420 rotates,
The lock arm 360 can be automatically locked. Also at this time, the reversible rotation motor 420 is set in a state in which the reversible rotation motor 420 can be rotated in the reverse direction, and waits in a state where the reversible rotation motor 420 is rotated in the reverse direction when the door 21 is next opened.

As shown in FIG. 8A, an automatic door lock device 12 according to a third embodiment of the present invention
In the automatic door lock device 11 according to the embodiment, the lock having the latch 30 protruding from the door frame 20, the insertion portion 37, and the elongated sliding portion 38 communicating with the insertion portion 37. Instead of using the arm 360, a latch 300 and a lock arm 361 having the following configuration are used. That is, the latch 300 includes a base portion 311 fixed to the door frame 20 and a pair of engaging pins 312 supported by the base portion 311 so as to face the door frame 20 at an interval in parallel with the door frame 20. . Lock arm 361
Is provided with a pin hole 362 on one side surface of one end, and the pin hole 36
2 is supported by a bracket 364 through a rotation pin 363 and is swingably supported around the rotation pin 363. On both sides of the lock arm 361 where the pin hole 362 is provided, a sliding groove 365 with which the engaging pin 312 is engaged to slide in the longitudinal direction of the lock arm 361, and a sliding groove near the pin hole 362. Notch 36 cut out from the side of 365
6 is provided.

When the lock arm 361 is tilted in the locked state with the door 21 closed, as shown by the dashed line in FIG. 8B, the engagement pin 312 passes through the notch 366. Into the sliding groove 365. When the door 21 is opened in this state, the engagement pin 312 is
, The engaging pin 312 stops at the end of the sliding groove 365 so that the door 21 is in a half-open state.
As shown by the solid line in FIG. 8B, when the lock arm 361 is tilted in a direction in which the door 21 is closed and the lock arm 361 is unlocked, the engagement pin 312 causes the pin hole 3 of the slide groove 365 to move.
It slides in the vicinity of 62, disengages from the sliding groove 365 through the notch 366, and the door 21 can be opened. Thereby, the lock arm 361 having high rigidity is obtained. The operation of the door auto-lock device 12 according to the present embodiment is the same as the operation of the door auto-lock device 11 according to the second embodiment, and a description thereof will be omitted.

As shown in FIGS. 9 and 10A, the fourth
The door auto-locking device 13 according to this embodiment has a chain 80 which is fixed to the door frame 20 at one end by a stopper 81 and provided at the other end with a latch 82 as a stopper. The door 21 is provided inside the door frame 20 so as to be openable and closable. When the door 21 is closed, the latch 82 at the tip of the chain 80 is engaged with the latch 82 by opening the door 21 so that the door 21 can be locked. A hook 83 is provided. That is, the hook portion 83
Is a groove 84 fixed to the door 21, a sliding arm 85 that covers the groove 84 so that it can be opened and closed, and has an L-shaped tip.
It has a guide plate 86 for sliding the sliding arm 85 laterally along the door 21. When the sliding arm 85 linearly moves toward the door frame 20 from the side of the hanging chain 80 toward the wall surface of the groove portion 84, the latch 82 is moved to the sliding arm 85 when the chain 80 is pulled up at that position. When the sliding arm 85 moves in a direction away from the chain 80 in a locked state in which the sliding arm 85 moves away from the chain 80, the latch 82 is in an unlocked state in which the sliding arm 85 is not locked by the sliding arm 85. Note that the outer diameter D of the latch 82 is larger than the apparent outer diameter d of the chain 80.

An engaging pin 8 is provided near the end of the sliding arm 85 opposite to the chain 80 with the guide plate 86 interposed therebetween.
7 are provided. Further, the sliding arm 85 can be advanced and retracted in the horizontal direction parallel to the door 21 by the lock mechanism 90. The lock mechanism 90 is, for example, a one-way rotation motor 9.
A speed reduction mechanism 93 having a reverse rotation preventing function such as a worm gear is connected to the first output shaft 92. A rotation plate 94 connected to an output shaft 92 of a one-way rotation motor 91 via a speed reduction mechanism 93 and a slide groove 95 eccentrically provided on the rotation plate 94 are provided, and engagement provided on a slide arm 85 is provided. The pin 87 is engaged. As a result, the rotation of the rotary plate 94 causes the engagement pin 87 to slide in the slide groove 95, and the slide arm 85 can move forward and backward together with the engagement pin 87. A projection 96 is provided on a part of the rotation plate 94 near the outer periphery. Further, the lock mechanism 90 is provided with the control device 5.
The one-way rotation motor 91 is driven by connecting a power source 520 composed of, for example, a battery to the one-way rotation motor 91 driven by 10.

The door 21 is provided on the door frame 20 with a lock sensor 610 and an unlock sensor 620 for detecting the approach of the protrusion 96 to detect the advance and retreat of the sliding arm 85, that is, for detecting the locked and unlocked states, respectively. For example magnet 6
A door sensor 640 that detects the open / closed state of the door 21 in accordance with the distance from the door 30 is provided. Further, the door 21 is provided with a buzzer 650 for notifying that the sliding arm 85 is in a locked state and the door 21 is in a half-open state in accordance with the outputs of the locking sensor 610 and the door sensor 640. Further, a key input means 660 including a switch key 661 for locking and unlocking the sliding arm 85 and a count key 662 for inputting a password can be provided inside the door 21. The key input means 660 sets a four-digit password, for example, and allows the unlock command of the sliding arm 85 to be input by inputting the password.

A control device 51 is provided near the lock mechanism 90.
0 is provided, and the operation of the buzzer 650 is controlled according to the opening / closing operation of the door 21. The control device 510
Receives the unlocking command signal from the key input means 660 and, upon confirming the signal that the door sensor 640 has detected the closing state of the door 21, sends a signal for unlocking the sliding arm 85 to the lock mechanism 90. The feed and one-way rotation motor 91 is driven. Further, the control device 510 slides the sliding arm 85 to the unlocked state, and confirms the signal of the door sensor 640 that operates when the door 21 is closed from the open state. Arm 85
Is locked. The sliding arm 8
5 is provided with a steady rest 89 so that the swing of the chain 80 does not increase.

The operation of the automatic door lock device 13 according to the present embodiment will now be described. The steps of the operation are almost the same as those of the automatic door lock device 10 according to the first embodiment (the operation steps can be referred to the flowchart shown in FIG. 2). As shown in FIG. 10A, when the door 21 is opened from the outside (or inside) in a locked state where the latch 82 can engage with the sliding arm 85, the latch 82 is lowered vertically to the chain 80. 10B, the latch 82 can move only from the raised position to the raised position until the latch 82 engages with the sliding arm 85. As shown in FIG.
The door 21 can be opened only up to the half-open state. In this state, the buzzer 650 for notifying the half-open state sounds according to the signal that the door sensor 640 detects the open state of the door 21 and the output signal that the lock sensor 610 detects the protrusion 96.
Here, a person outside (or inside) from the inside (or outside) of the door 21 can be confirmed. At this time, if it is in a safe state, the password (or the ON
By inputting the (-OFF signal), the buzzer 650 is stopped, and an unlock command signal is sent to the control device 510. Once the door 21 is closed, a signal indicating that the door 21 is closed by the door sensor 640 is output and sent to the control device 510. Upon receiving a signal indicating that the door 21 has been closed and an unlock command signal, the control device 510 sends a signal for unlocking the lock mechanism 90 to the one-way rotating motor 9.
1 is driven. Then, as shown in FIG. 10C, the sliding arm 85 is unlocked, and the unlock sensor 6
20 detects the protrusion 96 provided on the rotating plate 94, and a detection signal is sent to the control device 510. Therefore, the one-way rotation motor 91 is stopped, and the door 21 can be opened.

Next, when the door 21 is closed, a signal indicating that the door sensor 640 has changed from the open state to the closed state is sent to the control unit 510, and the control unit 510
When a signal to lock the sliding arm 85 is sent to the lock mechanism 90 and the one-way rotation motor 91 is driven, the protrusion 96 provided on the rotating plate 94 is moved from the position corresponding to the unlock sensor 620 to the lock sensor 610. Corresponding to Here, the output signal of the lock sensor 610 is output to the control device 510, and the one-way rotation motor 91 is stopped to automatically put the sliding arm 85 in the locked state as shown in FIG. Can be. If someone inside goes out,
When the door 21 is closed, the sliding arm 85 is automatically locked. However, when returning home, the sliding arm 85 is half-opened, the hand is put inside the door 21, and the password (or ON-
OFF signal) and sends an unlock command signal to the control device 510.
To unlock the sliding arm 85,
The door 21 can be opened.

By setting a predetermined number to the latch 82, for example, a number key 88 that can be unlocked is provided, and the latch 82 can be disassembled from the chain 80. In this case, the person who does not know the password of the key input means 660 in an emergency, for example, teaches the operation of the number key 88 to a specific person such as a manager of a building or an apartment, so that the specific person can open the gap of the door 21 in a half open state. , The latch key 82 is removed from the chain 80 by operating the number key 88, and the door 21 can be freely opened and closed. Note that a padlock can be used instead of the number key 88. In this case, since the sliding arm 85 is driven using the lock mechanism 90, the door 21 is opened halfway and the chain 8 is moved.
0 and the sliding arm 85,
It cannot be slid even if it tries to slide, and it is extremely safe.

In the door auto-locking device according to the fourth embodiment, an example in which a one-way rotation motor is used for the lock mechanism has been described, but the second embodiment is used instead of the one-way rotation motor. The reversible rotation motor and the polarity reversing mechanism described in the automatic door lock device according to the above-described embodiment may be used. In the description of the door auto-locking device according to the fourth embodiment, FIG. 9 shows an example in which the positions of the lock sensor and the unlock sensor are mounted at positions where the protrusions provided on the rotating plate are rotated substantially 180 °. However, the position of the locking sensor and the position of the unlocking sensor may be changed according to the length of movement of the sliding arm, and the locked state and the unlocked state of the sliding arm may be accurately realized. Although the door auto-lock device according to the first to fourth embodiments has been described as applied to an open door, it may be applied to a sliding door. Also, in the door auto-locking device according to the first to fourth embodiments, when inputting a password into the key input means, instead of directly inputting by hand, the input is performed using infrared rays, radio, or the like. It is also possible.

[0027]

According to the present invention, there is provided a door auto-locking device, wherein a lock provided on a door frame and a lock which is swingably attached to the door via a pivot pin and can be engaged with the latch. A lock arm driving mechanism for swinging the lock arm, a lock sensor and an unlock sensor for respectively detecting the locked and unlocked state of the lock arm, a door sensor for detecting the open / closed state of the door, and a lock sensor A buzzer for notifying that the lock arm is locked and the door is half-opened according to the output of the door sensor, key input means provided inside the door for inputting an unlock command of the lock arm, and key input means And sends a signal to unlock the lock arm to the lock arm drive mechanism after confirming the predetermined signal from the controller and the signal that the door sensor detects the closed state of the door, And has to check the signal of a door sensor that operates when closed from the state in which the door is open, and a control unit sending a signal to the lock arm in the locked state to the lock arm drive mechanism.

[0028] Thereby, in the locked state, the outside (or inside)
When the user tries to open the door, the door only opens to the half-open state, and in that state, the buzzer sounds and the person outside (or inside) the door can be confirmed. If you are in a safe state,
From the inside, a switch key of the key input means is used, and from the outside, a signal for instructing a predetermined unlocking such as an ON-OFF signal or a password is sent to the control device by the count key of the key input means, and the door is once closed. As a result, a signal indicating that the door is closed is sent from the door sensor to the control device, and the lock arm is unlocked by the lock arm drive mechanism.
In this state, the door can be opened. When the door is closed, a signal from the door sensor is sent to the control device, and the lock arm can be automatically locked. Therefore, there is no need to forget to operate the lock arm or the chain, and in particular, it is not necessary for a child or a physically handicapped elderly person or a handicapped person to operate the door lock device, so that safety can be easily and reliably secured.

In particular, in the door auto-lock device according to the second aspect, the lock arm driving mechanism is provided with a one-way rotating motor, a rotating plate fixed to an output shaft of the one-way rotating motor, and eccentrically provided on the rotating plate. A crank pin, a connecting pin provided at an intermediate portion of the lock arm, and a connecting bar having both ends rotatably connected to the connecting pin and the crank pin. Can be realized alternately between the locked state and the unlocked state. Therefore, the control device may have a configuration in which the one-way rotation motor is driven to rotate only in one direction, so that the control device can be simple and inexpensive. In the door auto-lock device according to the third aspect, the lock arm drive mechanism includes a reversible rotation motor and a rotation pin fixed to an end of the lock arm, and the rotation pin and the output shaft of the reversible rotation motor are connected to each other. Since the lock arm is directly connected, the lock arm can be directly connected to the output shaft of the reversible rotary motor, and the mechanical configuration of the lock arm drive mechanism can be simple and inexpensive.

According to a fourth aspect of the present invention, there is provided an automatic door lock device, wherein one end is fixed to a door frame and a latch is provided at the other end, and the latch is attached to the door and can be locked when the door is closed. A latch portion, the latch portion having a groove fixed to the door, and a sliding arm that covers the groove so as to be openable and closable and has an L-shaped tip, and moves the sliding arm forward and backward. A lock mechanism, a door sensor for detecting the opening and closing of the door, a lock sensor and an unlock sensor for detecting the advance and retreat of the sliding arm, and a state in which the sliding arm is locked and the door is locked according to the outputs of the lock sensor and the door sensor. Buzzer that informs that the door is half-opened, key input means provided inside the door for inputting the unlock command of the sliding arm, and a predetermined signal from the key input means and a door sensor have detected that the door is closed. Signal to unlock the sliding arm and send a signal to the lock mechanism.Also, check the signal of the door sensor that operates when the door is closed from the open state. And a control device for sending a signal for setting the sliding arm of the lock mechanism to a locked state.

Thus, the outside (or inside) in the locked state
If you try to open the door from below, the latch attached to the end of the chain will be locked by the sliding arm and the door will only open to the half-open state, in which state the buzzer will sound and the person inside or outside the door will be checked. Can be done. If it is safe, a predetermined signal such as a password is sent from the key input means to the control device, and once the door is closed, the signal that detects the closed state of the door is confirmed. Move the moving arm to the unlocked state. In this state, the door can be safely opened. When the door is closed, a signal from the door sensor is sent to the control device, and the sliding arm can be automatically locked. As described above, since the latch attached to the chain is automatically locked / unlocked, an inexpensive door auto-lock device having a simple structure can be provided. In particular, in the door auto-locking device according to the fifth aspect, since the number key is provided on the latch and can be disassembled, even in the case of an emergency, even a person who cannot operate the key input means enters the number key through the gap of the half-opened door. To remove the latch from the chain and open and close the door freely.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of an automatic door lock device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an unlocking operation of the automatic lock device.

FIG. 3 is a side view showing the vicinity of a lock arm of the automatic lock device when the door is in a half-open state.

FIG. 4 is a plan view showing a locked state of the automatic lock device.

FIG. 5 is a plan view showing an unlocked state of the automatic lock device.

FIG. 6 is a flowchart showing a locking operation of the automatic lock device.

FIG. 7 is a front view showing a configuration of an automatic door lock device according to a second embodiment of the present invention.

FIGS. 8A and 8B are a front view and a plan view, respectively, showing a lock arm of an automatic door lock device according to a third embodiment of the present invention.

FIG. 9 is a front view showing a configuration of an automatic door lock device according to a fourth embodiment of the present invention.

FIGS. 10A, 10B, and 10C are plan views showing the locked state, the half-opened state of the door, and the unlocked state of the automatic lock device, respectively.

[Explanation of symbols]

10, 11, 12, 13: Automatic door lock device: 2
0: door frame, 21: door, 30: latch, 31: base, 32: neck, 33: head, 34: bracket, 3
5: rotating pin, 36: lock arm, 37: insertion section, 3
8: sliding portion, 40: lock arm drive mechanism, 41: reduction gear, 42: one-way rotating motor, 43: output shaft, 44: rotating plate, 45: crank pin, 46: connecting pin, 47: connecting bar, 48: protrusion, 49: unlock switch, 50: control device, 51: power supply, 61: lock sensor, 62: unlock sensor, 63: magnet, 64: door sensor, 6
5: buzzer, 66: key input means, 80: chain, 8
1: Stopper, 82: latch, 83: latch, 84: groove, 85: sliding arm, 86: guide plate, 87:
Engagement pin, 88: number key, 89: steady rest, 90: lock mechanism, 91: one-way rotating motor, 92: output shaft, 9
3: speed reduction mechanism, 94: rotating plate, 95: sliding groove, 96: protrusion, 300: latch, 311: base, 312: engagement pin, 340: bracket, 350: rotation pin, 36
0, 361: Lock arm, 362: Pin hole, 363:
Rotating pin, 364: bracket, 365: sliding groove, 36
6: Notch, 400: Lock arm drive mechanism, 41
0: reducer, 420: reversible rotary motor, 430: output shaft, 480: protrusion, 500, 510: control device, 52
0: power supply, 610: lock sensor, 620: unlock sensor, 630: magnet, 640: door sensor, 65
0: buzzer, 660: key input means, 661: switch key, 662: count key

Claims (5)

[Claims] 1. A door having a latch provided on a door frame having a door that can be opened and closed, and a lock arm that is swingably attached to the door via a pivot pin and is engageable with the latch. An auto-lock device, comprising: a lock arm drive mechanism for swinging the lock arm; a lock sensor and an unlock sensor for respectively detecting a locked and unlocked state of the lock arm; and a door for detecting an open / closed state of the door. A sensor, a buzzer for notifying that the lock arm is in a locked state and the door is in a half-open state in accordance with outputs of the locking sensor and the door sensor, and a buzzer provided inside the door to unlock the lock arm. Key input means for inputting an unlock command to be turned on by at least one of an ON-OFF signal and a password, a predetermined signal from the key input means, The door sensor sends a signal to the lock arm drive mechanism to confirm the signal that the door sensor detects the closed state of the door and to put the lock arm in the unlocked state,
A control device that checks a signal from the door sensor that operates when the door is closed from an open state, and sends a signal to the lock arm drive mechanism to lock the lock arm. Automatic door lock device. 2. The automatic door lock device according to claim 1, wherein the lock arm driving mechanism includes a one-way rotating motor, a rotating plate fixed to an output shaft of the one-way rotating motor, and an unbalanced rotating plate. A door automatic lock, comprising: a crank pin provided centered; a connecting pin provided at an intermediate portion of the lock arm; and a connecting bar having both ends rotatably connected to the connecting pin and the crank pin. apparatus. 3. The automatic door lock device according to claim 1, wherein the lock arm driving mechanism includes a reversible rotation motor and the rotation pin fixed to an end of the lock arm, and the rotation pin and the reversible rotation motor. An automatic door lock device directly connected to an output shaft of a rotary motor. 4. A chain having one end fixed to a door frame having a door that can be opened and closed and having a latch as a stopper at the other end, and a latch attached to the door and capable of locking the latch when the door is closed. A lock device for a door, comprising: a lock portion, wherein the lock portion has a groove fixed to the door, and a sliding arm that covers the groove so as to be openable and closable and has a L-shaped tip. In addition, a lock mechanism that can lock and unlock the sliding arm by moving the sliding arm forward and backward, a door sensor that detects opening and closing of the door, and a locking sensor and an unlocking sensor that detects the moving forward and backward of the sliding arm. ,
A buzzer that indicates that the sliding arm is locked and the door is half-opened according to the outputs of the locking sensor and the door sensor, and a buzzer provided inside the door to unlock the sliding arm Key input means for inputting an unlock command by at least one of an ON-OFF signal and a password, a predetermined signal from the key input means and a signal obtained by the door sensor detecting a closed state of the door, and A signal for unlocking the sliding arm is sent to the lock mechanism, and a signal from the door sensor that operates when the door is closed from an open state is confirmed. A control device for sending a signal for locking the moving arm. 5. The door auto-locking device according to claim 4, wherein the latch is provided with a number key so that the chain can be detached by disassembly.