JPH038987A - Robbery preventor for building - Google Patents

Abstract

PURPOSE:To prevent wrong unlocking of key by a method in which when a door key or the other is inserted into a cylinder lock, a coupling piece is fitted into a recession leading from the outside of an outer cylinder to the surface of an inner cylinder to interrupt the rotation of the inner cylinder. CONSTITUTION:A sensor 6 to detect the face that a door key 200 or other is inserted into a cylinder lock is provided, and a recession 50 leading from the outside of an outer cylinder 1 to the surface of an inner cylinder 2 is also provided. A coupling mechanism 70 with an inward energized coupling piece 71 to fit into or come out the recession 50 is provided on the corresponding place of the recession 50. When a detection signal is sent out from the sensor 6, the drive part 72 of the mechanism 70 is operated to fit the piece 71 into the recession 50 and also to prevent the rotation and unlocking of the inner cylinder 2 by sending an alarm. Also, by setting the sensor 6 to OFF previously, proper unlocking can be permitted.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention is applicable to apartments, warehouses, houses, etc., as well as entrances and exits (doors, etc.) of buildings such as storerooms and eaves storages, windows, and doors of rooms. The present invention relates to an anti-theft device for buildings that can be used to prevent theft in cases where the lock is removed.

(b) Conventional Technology Entrances and exits, windows, and room doors of buildings such as condominiums, warehouses, and houses are provided with locks for security purposes.

However, these locks do not provide sufficient security for crime, and the lock may be opened with a counterfeit key or screwdriver, or destroyed while you are out or sleeping.
Not only money and goods inside the building, but also credit cards and cash cards are stolen and used for secondary crimes, and there are many cases where personal injury is caused, and recent crimes are taking a more violent direction. , Various studies have been made to deal with this problem.

For this reason, several alarm devices (anti-theft devices) are listed below.
is proposed.

That is, in a lock configured such that the locking part engages with the locking groove to prevent rotation and lock, the engaging part between the locking pawl and the locking groove, or the engaging part and the cylinder. The lock is characterized in that a switch is provided at the tip of the outer cylinder, and when a key other than the official key is inserted into the keyhole of the lock, the switch is turned on and the alarm is activated. 60-72864).

(e) Problems to be Solved by the Invention However, this device has an extremely complicated structure and is expensive, and even if the key is normal, by inserting it into the keyhole, the switch inside the key will be touched and an alarm will be issued. There is a risk that the device will activate and an alarm will be issued, which means that even residents or building managers may be alarmed.Furthermore, there are problems such as a lack of practicality due to the risk of malfunction and lack of long-term stability. be.

In view of these problems with conventional theft prevention technology, the present invention has been developed to prevent thieves from opening entrances and exits (doors, etc.), windows, or room doors of buildings such as apartments, warehouses, and houses, as well as storerooms and storage under the eaves. If someone attempts to unlock the lock, the system detects the action and prevents the inner cylinder from rotating, making it impossible to unlock the lock and issuing an alarm. , the building manager, or a person authorized by these persons (hereinafter referred to as building residents, etc.) shall turn off the sensor inside the door cylinder lock, and then insert the door key or other object into the door cylinder lock. The purpose of the present invention is to provide an anti-theft device for buildings that prevents the generation of alarms and also allows unlocking, has a simple structure, does not malfunction, and has excellent long-term stability. do.

(d) Means for Solving the Problems In order to achieve the above object, the anti-theft device for buildings of the present invention is an anti-theft device for apartments, warehouses, houses, etc. is provided with a sensor for detecting the insertion of a door key or other object into the cylinder lock, and is also provided with a recess communicating from the outside of the outer cylinder to at least the surface of the inner cylinder, and is provided with a locking mechanism at a location corresponding to the recess, and the locking mechanism is provided with a locking piece that is removably fitted into the recess and is biased inwardly, and the locking mechanism is provided with a locking piece that is biased inwardly and outwardly of the cylinder lock. is provided with a drive unit that fits the locking piece into the recess by sensing an output signal from the sensor, and when the locking piece fits into the recess, the inner cylinder rotates and the lock is unlocked. By sensing the output signal from the above sensor while preventing
An alarm device that issues an alarm; and a control device that receives output signals from an alarm drive device that outputs a signal that drives the alarm device and causes the alarm device to issue an alarm based on these output signals. It is characterized by:

That is, the anti-theft device for buildings of the present invention is attached to entrances and exits (doors, etc.), windows, and room doors of buildings such as apartments, warehouses, and houses, as well as storerooms and under-eaves storage, and is attached to doorways, etc., of buildings such as apartments, warehouses, and houses. When someone attempts to unlock a lock, the lock detects this action and prevents the inner cylinder from rotating, making it impossible for the key to be unlocked, thereby preventing theft of money and other items in the building and personal injury. It is for. Generally, when opening a cylinder lock such as a door with an imitation key, the imitation key is inserted into the key slot of the cylinder lock and the inner cylinder is rotated to unlock it. It is not easy to rotate and open the inner cylinder by inserting the locking piece into the recess that communicates from the outside of the outer cylinder to at least the surface of the inner cylinder after inserting the key and before opening the lock. It is designed to prevent locks.

The cylinder locks used in the present invention include condominiums,
In addition to warehouses and houses, it is attached to entrances and exits (doors, etc.), windows, and room doors of buildings such as storerooms and eaves storage, and is composed of an outer cylinder and an inner cylinder. However, it is not particularly limited.

In order to achieve the above object, this cylinder lock is provided with a recess that communicates from the outside of the outer cylinder to at least the surface of the inner cylinder.

Further, the sensor used in the present invention is not particularly limited as long as it can be attached to the above-mentioned cylinder lock and can detect that a door key or other object is inserted into the cylinder lock. For example, an optical sensor having a light emitting element and a light receiving element, a door key, or b)
Examples include proximity switches such as limit switches that operate in contact with other objects.

Then, this sensor detects that a door key or other object is inserted into the cylinder lock, and by sensing the output signal from the sensor, drives a drive section to be described later, and by driving the drive section, Rotation of the inner cylinder is achieved by fitting the locking piece in the locking mechanism into the recess.
This prevents unlocking and also issues an alarm.

Incidentally, the locking mechanism is provided with a locking piece that is removably fitted into the recess and biased inward, but the locking piece is configured to protrude when driven by the drive unit. There is.

This locking mechanism is provided on the outside of the cylinder lock, particularly at a location corresponding to the recess of the cylinder lock.

The driving part is not particularly limited as long as the driving part causes the locking piece to protrude, and specific examples thereof include a cam mechanism, a magnet, and the like.

Further, the alarm device used in the present invention is particularly limited as long as it is driven by an alarm signal from a control means that senses an output signal from the above-mentioned sensor and an output signal from an alarm drive means described later. Instead, for example, a buzzer that generates an abnormal alarm sound, a red light lamp that generates a red light, or a combination thereof may be used.

The alarm driving means is not particularly limited as long as it transmits a signal to drive the alarm,
For example, the above-mentioned alarm can be driven by directly inserting a remote control transmitter and receiver, a light-emitting element and a light-receiving element, into a connector provided on the outside of an entrance, a window, or a door of a building such as an apartment, warehouse, or house. For example, a device that transmits a signal that causes

Further, the control means detects an output signal from the sensor and an output signal from the alarm drive means when the thief inserts a door key or other object into the door cylinder, thereby triggering the alarm. It is not particularly limited as long as it has a structure that outputs an alarm signal and generates an alarm based on this alarm signal. Specifically, when an output signal from the CPU of the computer, that is, an output signal from the alarm driving means and an output signal from the above sensor are input, an alarm No. 8- is output to the above alarm based on these output signals. It is equipped with a CPU in which a program for generating an alarm is stored, or an AND circuit of logic elements, and the output signal from the alarm driving means and the output signal from the sensor are input. a device that outputs an alarm signal to the alarm device to generate an alarm based on these output signals; and a series circuit of a first switch connected to the sensor and a second switch connected to the receiver. An example of such a device is to input an output signal from the sensor and an output signal from the receiver, output a drive signal to an alarm device based on these output signals, and generate an alarm. .

In the anti-theft device for a building according to claim 2 of the present application,
A recess in the cylinder lock is provided to reach from the outside of the outer cylinder to the center of the inner cylinder, and upon sensing that the tip of a door key or other object is inserted into the cylinder lock, a locking piece is inserted into the recess. By fitting,
Constructed so that door keys etc. cannot be completely inserted,
This prevents layer theft.

In the anti-theft device for a building according to claim 3 of the present application,
Since the drive part is provided in the locking mechanism, this device is compact and extremely easy to attach to a door or the like.

(e) Function The anti-theft device for a building according to the present invention has the above-mentioned configuration, and when a resident of the building closes the door of the building, makes a Y arrow, and leaves the building, the sensor is set to the on state. . Therefore, when a thief inserts a foreign object into the cylinder lock of a building, a sensor detects this abnormality, and the drive unit is driven based on the output signal from the sensor to fit the locking piece in the locking mechanism into the recess of the cylinder lock. This prevents the inner cylinder of the cylinder lock from rotating and prevents the cylinder lock from being unlocked, or prevents the insertion of counterfeit keys into the inner cylinder of the cylinder lock. This has the effect of preventing theft.

Furthermore, when a thief inserts a foreign object into the door cylinder lock of a building, for example, the sensor turns on, and as a result, the control means controls the alarm from the alarm based on the on state of the alarm driving means and the sensor. Generate an alarm.

On the other hand, when residents of a building open a building door, etc., they first turn off the sensor, that is, prevent the signal from being transmitted to the drive unit, and thereby release the drive unit. Then, you can safely open the lock by inserting a door key or other object into the ring lock.

In this case, since the sensor is off, no signal is emitted from the sensor, and therefore no alarm is emitted.

(f) Examples Hereinafter, the present invention will be explained in detail based on Examples, but the present invention is not limited thereto.

FIG. 1 is a perspective view of a door cylinder lock of an embodiment of the anti-theft device for a building according to the present invention, and FIG. 2 is a schematic side view of the door cylinder lock.

This anti-theft device can be used in apartments, warehouses, houses, etc.
They are attached to entrances and exits (doors, etc.), windows, or room doors of buildings such as storerooms and storage under the eaves.

In FIGS. 1 and 2, the door cylinder lock 100 is
It consists of a cylindrical outer cylinder 1 and an inner cylinder 2 mounted inside the outer cylinder 1, and the inner cylinder 2 is rotatably installed inside and has a flat key insertion opening 3 in the center. The door key 2 is inserted into the key insertion slot 3.
00 is configured to be freely inserted and removed.

Further, holes 4, 4 are formed in the outer cylinder 1, and holes 5.5 are formed in the inner cylinder 2, and these holes 4.
．． 4.5.5 is configured to communicate with the inner cylinder 2 when the door key 200 is not inserted to form the through hole X.

That is, unless the door key 200 is inserted and turned, the inner cylinder 2 will not move due to the urging force of the spring (not shown).
The outer cylinder 1 is always located at a predetermined location, and when the inner cylinder 2 is located at the predetermined location, the holes 4, 4
．． 5, 5 are arranged in a row with each other to form a through hole X.

Further, in the holes 4, 4 of the outer cylinder 1, as shown in FIGS. 1 to 7, a sensor 6 is installed to detect when a door key 200 or other object is inserted into the door cylinder lock 100. It is installed.

In this case, the sensor 6 is an optical sensor having a light-emitting element and a light-receiving element, but in addition to this, a transmitting element such as an ultrasonic wave or a radio wave and its receiving element are also used.

This sensor 6 will be explained in detail below.

To explain in detail the case of an optical sensor among the above-mentioned sensors 6, the optical sensor includes a light emitting diode 61 and a 7-ototransistor 62.

That is, as shown in FIGS. 1 to 7, the outer cylinder lock 1
The through hole X of 00 has a light emitting diode 61 inside its negative side.
A transistor 62 is provided for sensing the output signal on the other side. Therefore, when the through hole X is formed, the light emitted from the light emitting diode 61 passes through the through hole X and enters the seven-dimensional transistor 62.

Furthermore, instead of the sensor 6 described above, as shown in FIGS. 8 and 9, the door cylinder lock 100 is provided with a communication hole XI that communicates with the key insertion port 3 from one side thereof. On the outside of the communication hole A sensor 6 (63) consisting of a sensor (not shown) is provided. Then, the signal is reflected from the key insertion opening 3 by hitting the door key 200, etc., and the sensing section senses this reflected signal, turning on the sensor 6 (63) and emitting an output signal.

In this case, it is preferable to use a sensor that detects disturbances in the reflected signal, since the reflected signal from the inner wall of the door cylinder lock 100 and the reflected signal from the door key 200 etc. can be easily detected, thereby eliminating malfunctions. .

In Uni, the sensor 6 used is not particularly limited as long as the output signal hits a door key etc. and the disturbance of the reflected signal can be detected. The sensor 6 includes a sensor (output section) and a sensing element (sensing section) that senses the disturbance or the like.

In the present invention, an optical fiber may be used as the cable for transmitting the output signal from the sensor 6 (by configuring it in this way, malfunctions due to electrical noise caused by electromagnetic waves etc. are reduced and reliability is further improved). becomes higher.

In the above anti-theft device, the cylinder lock 100 includes a recess 50 that communicates from the outside of the outer cylinder 1 to at least the surface of the inner cylinder 2, as shown in FIGS.
A recess 50 is provided on the outside of the cylinder lock 100.
A locking mechanism 70 is provided at a location corresponding to the locking mechanism 70, and the locking mechanism 70 is provided with a locking piece 71 that is removably fitted into the recess 50 and biased inward.

Then, when the door key 215-00 or something else is inserted into the cylinder lock 100, the sensor 6 detects this, and a driving part 72 is provided to fit the locking piece 71 into the recess 50, and the locking piece 7
1 is fitted into the recess 50 to prevent rotation and unlocking of the inner cylinder 2.

By the way, as shown in FIGS. 1 to 7, it is preferable that the drive section 72 is provided in the locking mechanism 70 because the entire device becomes compact and the installation and handling thereof becomes easier.

FIG. 9 is a block diagram of an embodiment of the anti-theft device for buildings according to the present invention.

The 7-transistor 62 of the sensor 6 is connected to the base of another transistor 7. The output of this transistor 7 is connected to a CPU of a computer as an example of control means 9 via an I10 interface 8.

On the other hand, the locking mechanism driving means 12 is a locking mechanism 70 which will be described later.
and means for transmitting a signal for driving the alarm 14, for example, as shown in FIG. 10, the remote control transmitter 10 and the receiver 1
Consists of 1. The remote control transmitter 10 is a means for transmitting radio waves at a frequency specific to each building or room. To the extent that there is a risk of interference with the frequencies of other buildings, the frequency can be shared to some extent with the frequencies of other buildings (for example, by preventing interference by zoning or other methods).

Note that 101 is an antenna section, 102 is an M transmitting section, and 103 is a control section that controls each of these sections.

Further, the receiver 11 is a means for receiving radio waves transmitted from the remote control transmitter 10. This receiver 11 is set near a cylinder lock 100 in a building. This receiver 11 has an I10 interface 1
3 to the CPU 9.

Note that this locking mechanism driving means 12 does not necessarily have to be a remote control system that transmits radio waves; for example, this locking mechanism driving means 12 is directly connected to a connector section provided on the outside of a building door, etc. A drive signal may be transmitted to the cylinder lock 100 by inserting the cylinder lock.

In this case, residents of the building may prevent the drive signal from being generated by inserting the locking mechanism driving means 12 into the connector part again, or the residents of the building may insert the locking mechanism driving means 12 into the connector part, or insert the locking mechanism driving means 12 into the connector part provided outside near the cylinder lock 100 of the building. By directly inserting the locking mechanism drive means 12, a drive signal is transmitted to the computer, which is stored in the computer.Then, when the building occupant opens the door, the remote control transmitter 10 turns it off. It may be configured to do so.

In this case, the locking mechanism 70 includes a drive section 72 and a drive section 72.
The projection of the locking piece 71 causes the recess 5 in the cylinder lock 100 to be closed.
0 so that it can be freely fitted and removed.

The locking piece 7 serves as the drive section 72 in this locking mechanism 70.
There is no particular limitation as long as it is a mechanism that operates 1 in a manner that it can appear and retract freely, but specifically, for example, a servo motor,
Examples include electromagnetic equipment.

The locking mechanism 70 is connected to the CPU 9 via the I10 interface 15.

A ROM memory 95 is connected to the CPU 9. When the output signal from the receiver 11 and the output signal from the sensor 6 are input to the CPU 9, the RO'M memory 95 stores the following information based on these output signals.
A program for causing the CPU 9 to output a locking mechanism drive signal to the locking mechanism 70 to operate the drive section 72 is stored.

Further, a RAM memory 96 is a writable and readable memory connected to the CPU 9 and used for the operation of the CPU 9.

Furthermore, in this case, the two-way locking mechanism driving means 12 also serves as a means for transmitting a signal for driving an alarm 14, which will be described later. In other words, by turning on the locking mechanism driving means 12, the alarm driving means is turned on, and by sensing the output signal from the sensor 6, the alarm driving means is turned on. The alarm driving signal is transmitted to 14.

The alarm device 14 is a buzzer that generates an abnormal alarm sound, a red light lamp that generates a red light, or a combination thereof.

The alarm device 14 is connected to the CPU 9 via an I10 interface 15.

A ROM memory 95 is connected to the CPU 9. In the ROM memory 95, when the output signal from the receiver 11 and the output signal from the sensor 6 are input to the CPU 9, the CPU 9 sends an alarm signal to the alarm device 14 based on these output signals. A program for outputting and generating an alarm is stored.

Further, a RAM memory 96 is a writable and readable memory connected to the CPU 9 and used for the operation of the CPU 9.

FIG. 11 is a block diagram of another embodiment of the invention.

In FIG. 11, the control means 9 includes an AND circuit of logic elements, etc., inputs the signal from the receiver 11 and the signal from the sensor 6, and only when both signals are on, the drive circuit 16 and outputs a drive signal to the locking mechanism 70 to operate the drive section 72.

Further, in this case, the locking mechanism driving means 12 also serves as a means for transmitting a signal for driving an alarm device 14, which will be described later. In other words, by turning on the locking mechanism driving means 12, the alarm driving means is turned on, whereby the alarm driving means is turned on, and by sensing the output signal from the dual sensor 6, An alarm drive signal is transmitted to the alarm device 14.

That is, the control means 9 is equipped with an AND circuit of logic elements, etc., inputs the signal from the receiver 11 and the signal from the sensor 6, and only when both signals are on, the drive circuit 16 operates. The drive signal is amplified and outputted to the alarm device 14 to generate an alarm.

FIG. 12 is a block diagram of the control means 9 showing still another embodiment of the present invention.

In FIG. 12, the control means 9 comprises a series circuit of a first switch 91 connected to the sensor 6 and a second switch 92 connected to the receiver 11. In this case as well, the control means 9 controls the signal from the sensor 6 and the receiver 1.
1, and only when both signals are on, a drive signal is output to the locking mechanism 70, actuating the drive section 72, and fitting the locking piece 71.

Further, in this case, the locking mechanism driving means 12 also serves as a means for transmitting a signal for driving an alarm device 14, which will be described later. In other words, by turning on the locking mechanism driving means 12, the alarm driving means is turned on, and by sensing the output signal from the sensor 6, the alarm driving means is turned on. 1
The alarm driving signal is transmitted to the 4th point.

That is, the control means 9 controls the tIS connected to the sensor 6.
A series circuit of a switch 91 and a second switch 92 connected to the receiver 11 is provided.

In this case as well, the control means 9 inputs the signal from the sensor 6 and the signal from the receiver 11, and only when both signals are on, outputs a drive signal to the alarm 14 to issue an alarm. It is something that generates.

Next, the operation of the above embodiment will be explained.

When residents of the building leave the building, the door is locked, and the remote control transmitter 10 transmits a locking mechanism drive radio signal and an alarm drive radio signal.

The radio signal is received by the receiver 11 and input to the CPU 9.

On the other hand, a thief approaches the door of the building in such a state and inserts a fake door key or a similar foreign object into the door cylinder lock 10.
0 and try to open the door. Door cylinder lock 1
Since the sensor 6 is attached to the sensor 00 as described above, the insertion of the sensor 6 eliminates the penetrating state of the through hole X and blocks light. As a result, the sensor 6 detects the insertion of the foreign object. The ON output of the sensor 6 is input to the CPU 9 through the I10 interface 8. Therefore, the CPU 9 recognizes that the ON signal is input to both the receiver 11 and the sensor 6 23-, and outputs a locking mechanism driving radio wave signal and an alarm driving radio wave signal to the locking mechanism 70 to activate the driving unit. 72 and the alarm 14 are activated, whereby the locking piece 71 fits into the recess 50, thereby preventing rotation and unlocking of the inner cylinder 2 and issuing an alarm.

Therefore, even if a thief attempts to open the door with a foreign object, not only will he be unable to unlock the door, but an alarm will be issued, making it impossible for the thief to do so.

On the other hand, when a resident of the building uses a door key to open the door of the building, the locking mechanism drive signal 12 is released by the remote control transmitter 10 that the resident carries. As a result, when the door key 200 is inserted into the cylinder lock 100, an on signal is output from the sensor 6, but a locking mechanism drive signal is not input from the receiver 11, so the above-mentioned C
Since the PU 9 does not output the locking mechanism drive signal to the locking mechanism 70, the drive section 72 does not operate, and since the alarm drive radio wave signal is not input, the CPU 9 outputs the alarm signal to the alarm. Since there is no output to 14, there is no need to worry about an alarm being issued.

The AND circuit of the embodiment shown in FIG. 11 and the series circuit of the embodiment shown in FIG. 12 operate in the same manner as the CPU 9 described above.

In the anti-theft device for a building according to the present invention, as shown in FIG.
is provided so as to reach the center of the inner cylinder 2 from the outside of the outer cylinder 1, and a door key 20 is installed inside the cylinder lock 100.
The door key 200 or the like may be configured to be unable to be completely inserted by sensing that the tip of the door key 200 or other object is inserted and fitting the locking piece 71 into the recess 50. By configuring this, the theft of the negative layer can be prevented.

In the anti-theft device for a building according to the present invention, the locking mechanism may have a structure in which the driving part 72 and the locking piece 71 are separated, as shown in FIGS. As shown in FIG. 7, since the driving portion 72 is provided in the locking mechanism 70, this device is compact and extremely easy to handle, such as when it is attached to a door or the like.

(g) Effects of the Invention As is clear from the above description, the anti-theft device for a building according to claim 1 includes a locking sensor and a sensor that detects that a door key or other object is inserted into a door cylinder lock. and a locking mechanism driving means that outputs a signal to drive the mechanism, and when the sensor and the locking mechanism driving means are in the ON state, the driving part of the locking mechanism is driven to move the locking piece at least in the inner cylinder. As a result, even if a thief attempts to open a building door using a counterfeit door key, the inner cylinder will be prevented from rotating and unlocking, and the money, credit cards, etc. inside the building will be blocked. This has the effect of preventing theft of cash cards and the like.

In addition, when a thief opens the door, the sensor and alarm driving means are turned on, causing the alarm to issue an alarm and preventing money, items, credit cards, cash cards, etc. inside the building from being stolen. This has the effect of preventing theft.

On the other hand, when residents of the building open the door themselves, they can operate the locking mechanism drive means in advance to release the locking mechanism and the alarm, so they can unlock the door without issuing an alarm.

In other words, in the present invention, 1. When a thief attempts to unlock an entrance, window, or room door of a building such as an apartment, warehouse, or house, the locking mechanism and alarm are activated before the key is unlocked. This means that when a thief inserts a door key or other object into the door cylinder lock, the lock is prevented from being unlocked and an alarm is issued. is configured so that the locking mechanism and the alarm will not operate if the door key or other object is inserted into the door cylinder lock after the locking mechanism drive means and/or the sensor in the door cylinder lock is turned off in advance. It has a simple structure, no malfunction, and excellent long-term stability.

In the anti-theft device for buildings according to claim 2, a recess is provided to reach the center of the inner cylinder of the cylinder lock, and a locking piece fits into the recess to prevent foreign objects such as a door key from being inserted. There is no such thing. Such a simple structure has the effect of preventing the -layer theft.

In the anti-theft device for a building according to claim 3, since the driving part is provided in the locking mechanism, this device has effects such as being extremely easy to handle when attached to a door etc. We have it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the anti-theft device for a building according to the present invention, FIG. 2 is a side view thereof, and FIGS. 3 and 4 are perspective views showing other embodiments of the present invention. FIG. 5 is a side view showing another embodiment, FIGS. 6 to 9 are sectional views showing still other embodiments of the present invention, and FIGS. 10 to 12 are sectional views showing each of the other embodiments. FIG. DESCRIPTION OF SYMBOLS 1... Outer cylinder, 2... Inner cylinder, 6... Sensor, 9... Control means, 12... Locking mechanism drive means,
14...8 alarm device, 16... drive circuit, 50... recess, 70...
... Locking mechanism, 71 ... Locking piece, 72 ... Drive section,
100...Door cylinder lock, 200...Door key X
...Through hole, Xl...Communication hole. -to ψ story-g2 x Lu Zhufei 1.00 ψΦ-1t

Claims (3)

[Claims] (1) An anti-theft device for buildings such as condominiums, warehouses, and houses, in which the cylinder lock of the anti-theft device is equipped with a sensor that detects when a door key or other object is inserted into the cylinder lock. A recess communicating from the outside of the outer cylinder to at least the surface of the inner cylinder is provided, and a locking mechanism is provided on the outside of the cylinder lock at a location corresponding to the recess, and the locking mechanism includes a locking mechanism that connects to the recess. A locking piece that is removably fitted is provided so as to be biased inward, and a drive is provided on the outside of the cylinder lock that causes the locking piece to fit into the recess by sensing an output signal from the sensor. and the locking piece fits into the recess to prevent rotation and unlocking of the inner cylinder, while sensing the output signal from the sensor,
The alarm device is equipped with an alarm device that issues an alarm, and a control device that receives output signals from an alarm drive device that outputs a signal that drives the alarm device, and causes the alarm device to issue an alarm based on these output signals. An anti-theft device for a building, characterized by: (2) A recess is provided to reach the center of the inner cylinder,
2. The anti-theft device for a building according to claim 1, wherein a locking piece is fitted into the recess to prevent insertion of a door key or the like. (3) The anti-theft device for a building according to claim 1 or 2, wherein the drive portion is provided in the locking mechanism.