JP2007063786A - Lock monitoring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock monitoring device effective in preventing, without using a key having a special structure, burglar such as picking by emitting an alarm upon detecting unlocking carried out by a process different from a predetermined process. <P>SOLUTION: In the lock monitoring device, an unlocking starting signal which is a starting point of unlocking operation is emitted by operating a button arranged secretly at a predetermined place. When an unlocking signal is received within a predetermined time after receiving the unlocking starting signal, the device is determined to be in normal operation. When the unlocking starting signal is not received before the unlocking signal is received, an alarm signal is emitted immediately. When the unlocking signal is not received even after a predetermined time set as a time for unlocking by a legitimate key elapses from a time of receiving the unlocking starting signal, the alarm signal is emitted at the time of elapsing the predetermined time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention provides an effective lock monitoring device for preventing crimes such as picking by detecting an unlock from the outside of a door by a procedure different from a predetermined procedure without modifying an existing lock. To do.

Recently, there are an increasing number of picking criminals who use a special tool to open the door locks and burglar criminals who use illegal joint keys. As countermeasures against picking, for example, as disclosed in Patent Document 1 and Patent Document 2, the internal structure of the lock itself is complicated, or the key hole is bent to prevent unauthorized unlocking by picking. .
On the other hand, as a countermeasure for preventing unauthorized use of a combined key, for example, as shown in Patent Document 3, an extremely complicated structure is adopted to prevent unauthorized key duplication.
.... JP 06-317050 A .... JP 09-158557 A .... JP-A-2003-49567

However, the above crime prevention measures have a problem that the structure of the lock is complicated and expensive. Moreover, it takes a lot of cost and time to replace all the existing door locks with ones that have changed structure. Furthermore, if it is difficult to duplicate the combined key, it may be inconvenient for the user to increase the number of authorized owners of the key.

The present invention has been made in view of such circumstances, and picking is performed without using a specially structured key by generating an alarm by detecting that unlocking is performed in a procedure different from a predetermined procedure. It is an object of the present invention to provide a lock monitoring device that is effective in preventing crimes.

The lock monitoring apparatus according to the present invention generates an unlocking start signal as a starting point of the unlocking operation by operating a button secretly disposed at a predetermined location, and after receiving this unlocking start signal, it is constant. When the door open signal is received within the time, it is judged as normal operation, and when the unlock start signal is not received before receiving the door open signal, immediately and after receiving the unlock start signal, If the door opening signal cannot be received even after a predetermined time set as the key opening time by the regular key has elapsed, an alarm signal is generated when the predetermined time has elapsed.

According to the present invention, when a person who does not know the procedure for operating a button before unlocking, such as a picker, unlocks the key directly without unlocking the button, an alarm is given at the moment of unlocking.
Also, even if the picking criminals knows the procedure of button operation before unlocking, it is longer than using a regular key to open a key using a special tool. Unlocking time is required.

By the way, according to the regulations for security performance testing of locks, cylinders and thumb turns agreed at the public-private joint conference on the development and popularization of building parts with high security performance, special skill testers use appropriate tools in less than 5 minutes. The inability to unlock them is considered a requirement for success.

Therefore, if it takes time to open the key, an alarm signal will be issued when a predetermined time (generally 5 to 10 seconds) set with reference to the key opening time with the regular key has passed. It is possible to intimidate the picking criminals during opening.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front view of a door portion to which a lock monitoring device according to an embodiment of the present invention is attached, and a lock 2 having a keyhole 1 is attached at an appropriate position of the door. A door phone 4 having a speaker, a microphone and a call button 3 for calling is attached to a wall surface near the lock 2, and an unlocking start button 5 for transmitting an unlocking start signal to be described later is attached to the side surface of the door phone 4. Is provided.

The unlocking start button 5 does not necessarily need to be integrated into the door phone 4 and may be an independent dedicated button. However, the unlocking start button 5 is installed in a place where a person other than a person who has a regular key for locking does not pay attention. There is a need.

FIG. 2 is a block diagram showing the configuration of the lock monitoring apparatus according to one embodiment of the present invention.
6 is a lock monitoring device, 7 is an unlocking start signal input unit electrically connected to the unlocking start button 5 attached to the side surface of the door phone 4 described above, and 8 is output from the unlocking start signal input unit 7. The timer unit performs a timer operation in conjunction with the timer start signal, and the output side thereof is connected to the abnormality determination unit 11. Reference numeral 9 denotes an unlocking signal input / output unit, whose input side is connected to the unlocking signal contact 10 built in the lock 2 and whose output side is connected to the abnormality determination unit 11.

Further, an alarm speaker 13 and an alarm indicator lamp 14 are connected to the output side of the alarm output unit 12 connected to the abnormality determination unit 11.
It is also possible to use the speaker 15 of the door phone 4 as a substitute for the alarm speaker 13.

Next, the operation of the lock monitoring apparatus of the present invention will be described with reference to FIG.
First, the authorized key owner operates the unlocking start button 5 and then inserts the authorized key 16 into the lock 2 and opens the key without delay.

In this case, as a result of the operation signal of the unlocking start button 5 being sent to the timer unit 8 via the unlocking start signal input unit 7, the timer unit 8 is activated.
In parallel with the timer operation of the timer unit 8, an unlocking operation is performed. When the lock 2 is unlocked, the unlocked state is detected in the lock 2 and the unlock signal contact 10 is opened or closed, so that an unlock signal is sent to the unlock signal input / output 9. .

The abnormality determination unit 11 receives the unlocking signal output from the unlocking signal input / output unit 9 and the unlocking start signal output from the timer unit 8, and whether the time chart of both signals is in accordance with the normal unlocking procedure. Determine. If it is determined as abnormal, an abnormal signal is sent to the alarm output unit 12.

FIG. 3 shows a time chart of the alarm operation of the lock monitoring apparatus in one embodiment of the present invention, and three types of time charts are shown.

FIG. 3A is a time chart in the case where a regular key user opens the key.
First, when an authorized key user presses the unlocking start button 5, an unlocking start signal is output, and in conjunction with this, a timer signal is output from the timer unit 8.
When the lock 2 is unlocked and the unlock signal is output during the output of the timer signal, the timer signal is reset and the unlocking operation ends normally. No alarm signal is generated.

FIG. 3B is a time chart when the picking criminals know by some means the procedure for operating the unlocking start button 5 before the unlocking operation.

First, when the unlocking start button 5 is pressed, a timer signal is generated as described above. The timer time of this timer signal is set on the basis of the unlocking time during normal operation using a regular key, and is normally set to 5 to 10 seconds. When a picker or the like unlocks using a special tool, it is difficult to unlock within the timer time thus set short.
As a result, as shown in the figure, the unlocking cannot be performed within the timer time, and an alarm signal is output at the end of the timer time.

FIG.3 (c) is a time chart when a pickang criminal etc. do not know the procedure which operates the unlocking start button 5 before unlocking operation.
In this case, since the unlocking start button 5 is not pressed, no unlocking start signal is generated, and therefore the timer unit 8 is not started. When the picking offender succeeds in unlocking in a state where the timer signal is not generated and the unlocking signal is sent to the abnormality determining unit, the abnormality determining unit determines this state as abnormal. In this way, an alarm output is generated when the unlock signal is received.

The front view of the door part to which the lock monitoring apparatus in one Example of this invention is attached. 1 is a configuration block diagram of a lock monitoring device according to one embodiment of the present invention. The time chart of alarm operation | movement of the lock | rock monitoring apparatus in one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Keyhole 2 Lock 3 Call button 4 Doorphone 5 Unlock start button 6 Lock monitoring device 7 Unlock start signal input part 8 Timer part 9 Unlock signal input / output part 10 Unlock signal contact 11 Abnormality judgment part 12 Alarm output part 13 Alarm Speaker 14 Warning indicator lamp 15 Speaker 16 Regular key

Claims (1)

It is connected to an unlocking start button that is secretly placed at a predetermined location, a timer unit that starts in conjunction with an unlocking start signal generated by the operation of the unlocking start button, and an unlocking signal contact in the lock. The unlock signal input / output unit, the timer signal output from the timer unit and the unlock signal output from the unlock signal input / output unit, and an abnormality determination unit that determines normality and abnormality, and the abnormality An alarm output unit that outputs an alarm signal when an abnormality signal is received from the determination unit, and is determined to be normal operation when the unlock signal is received within a certain time after receiving the unlocking start signal; Immediately when receiving the unlocking signal in a state where the unlocking start signal has not been received, and after receiving the unlocking start signal, the predetermined time set by the timer unit has passed. When the unlock signal cannot be received A lock monitoring apparatus characterized by generating an alarm signal when a predetermined time has elapsed.

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