JP2012026203A - Lock device having disassembly detecting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a fraudulent action from being conducted by disassembling a lock device.SOLUTION: The lock device 1 includes: a lock device main body 10; loop-like circuit parts 23, 26, 29 and 32 for electrically connecting an outer side escutcheon 13, a cylinder unit 14, an inner side escutcheon 16 and a thumb-turn unit 17 respectively; detection parts 21, 24, 27 and 30 for detecting the disconnections of the loop-like circuit parts 23, 26, 29 and 32 respectively; and a control part 33 and a buzzer 34, etc., for outputting buzzer sound when the respective detection parts 21, 24, 27 and 30 detect the disconnections of the respective loop-like circuit parts 23, 26, 29 and 32. When one of the outer side escutcheon 13, the cylinder unit 14, the inner side escutcheon 16 and the thumb-turn unit 17 is detached from the lock device main body 10 or a door 2, the buzzer sound is outputted.

Description

  The present invention relates to a locking device that is attached to a door and that prevents the door from opening when locked.

  Generally, a lock device used for a door has a lock case and a lock device main body provided in the door with a bolt mechanism provided in the lock case, and an outer escation attached to the outside surface of the door. And, on the outdoor side of the door, a cylinder unit attached to the lock device main body through an attachment hole for the outer escation, an inner escation attached to the indoor side surface of the door, and an inner side on the indoor side of the door And a thumb turn unit attached to the lock device main body through an escation attachment hole.

  Such a locking device usually has a structure that cannot be disassembled from the outdoor side, but can be disassembled from the indoor side. For example, when it becomes necessary to change the key, an operator who receives a request from an administrator may disassemble the lock device from the indoor side and replace the cylinder unit.

  By the way, since the locking device can be disassembled from the indoor side, for example, the fraudster disassembles the locking device attached to the door from the inside of the room, and the fraudulent prepares the cylinder unit of the locking device in advance. It may happen that the cylinder unit is replaced with another cylinder unit. Then, the fraudster has a replacement key for the cylinder unit, and later unlocks the lock device using the key, opens the door of the room, enters the room, and steals it. There is a risk that things will happen.

  The fact that such an illegal act was actually conducted has not been reported at least in Japan, and such an illegal act prevents the cylinder unit from being easily removed from the lock device. Can be suppressed by taking the following measures. However, it is desirable to further strengthen fraud prevention.

  The present invention has been made in view of the above-described problems, for example, and an object of the present invention is to provide a lock device that can prevent an illegal act from being performed by disassembling the lock device. is there.

  In order to solve the above-mentioned problems, a first locking device of the present invention is a locking device that is attached to a door and prevents the door from being opened during locking, and is provided within the locking case and the locking case. Sometimes it has a bolt mechanism that makes it impossible to open the door by fixing it with the bolt protruding from the door, and it is attached to the locking device body provided inside the door and one side of the door A cylinder unit that is attached to the lock device main body on one side of the door, has a keyhole, and operates the bolt mechanism by inserting a key into the keyhole to perform locking and unlocking; The other side escation attached to the other surface side of the door and the other side of the door attached to the lock device main body have a knob, and operate the bolt mechanism by operating the knob. Unlocking Detecting that a detection object that is at least one of the thumb turn unit to be performed and the one side escation, the cylinder unit, the other side escation, or the thumb turn unit has been removed from the lock device main body or the door Disassembling detection means, and an alarm output means for outputting an alarm when the disassembly detecting means detects that the detection object has been removed from the lock device main body or the door. .

  According to the first locking device of the present invention described above, an alarm is output when the one side escation, the cylinder unit, the other side escation or the thumb turn unit is removed from the locking device body or the door. Thereby, for example, an administrator can know that the lock device has been disassembled, and can prevent theft preparation.

  Further, the second locking device of the present invention is the above-described first locking device of the present invention, wherein the disassembly detection means electrically connects the detection object and the locking device body. And detecting that the electric circuit is disconnected.

  According to the second locking device of the present invention described above, it is possible to reliably detect that the one side escation, the cylinder unit, the other side escation or the thumb turn unit has been removed from the locking device body or the door. Such detection means can be easily formed.

  The third locking device of the present invention described above is the above-described second locking device of the present invention, in which the detection target object is attached to the lock device main body or the door to the lock device main body and the detection target object. Terminals that are in contact with each other in a state of being connected and connected in the middle of the electric circuit are provided.

  According to the above-described third locking device of the present invention, when the detection object is attached to the lock device body, the terminal provided on the lock device body and the terminal provided on the detection object are brought into contact with each other. Since the electric circuit for the decomposition detection can be formed, the electric circuit for the decomposition detection can be easily formed. Further, it is possible to prevent the structure of the lock device from being complicated, and it is possible to prevent deterioration of the assemblability of the lock device.

  Further, the fourth locking device of the present invention is the above-described second or third locking device of the present invention, wherein the bolt mechanism is supplied from a driving power source provided outside or inside the locking device. And an electric actuator that performs the locking / unlocking operation by moving the bolt, and in the locking device, electric power for operating the disassembly detection means and the alarm output means is provided in the disassembly detection means and A dedicated power source different from the drive power source supplied to the alarm output means is provided.

  According to the above-described fourth locking device of the present invention, even when the drive power is turned off, the disassembly detection means and the alarm output means can be operated by the dedicated power supply, and the disassembly detection and the alarm output are performed. Can do.

  The fifth locking device of the present invention is characterized in that, in the above-described first to fourth locking devices of the present invention, the alarm output means is a buzzer.

  According to the fifth locking device of the present invention described above, it is possible to reliably notify that the one side escation, the cylinder unit, the other side escation or the thumb turn unit has been removed from the locking device body or the door. Such an alarm means can be easily formed.

  Further, a sixth locking device of the present invention is the above-described first to fifth locking device of the present invention, wherein the one side escation, the cylinder unit, the other side escation, and the thumb turn unit. Each is the detection object, the disassembly detection means detects for each detection object that the detection object is removed from the lock device main body or the door, and the alarm output means Based on the detection result of the detection means, an alarm is output when at least one of the detection objects is removed from the lock device main body or the door.

  According to the above-described sixth locking device of the present invention, if any one of the one side escation, the cylinder unit, the other side escation and the thumb turn unit is removed from the lock device main body or the door, an alarm is output. The As a result, for example, an administrator or the like can immediately know that the act has been performed at the time when the act of preparing for the theft is initiated, and thus can more effectively prevent the theft and other actions. .

  According to the present invention, it is possible to prevent an illegal act from being performed by disassembling the lock device.

It is sectional drawing which shows the locking device by embodiment of this invention. It is explanatory drawing which shows the decomposition | disassembly detection circuit etc. of the locking device by embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a locking device according to an embodiment of the present invention. In FIG. 1, the locking device 1 by embodiment of this invention is attached to the door 2 of the room, for example.

  The lock device 1 includes a lock device main body 10, and the lock device main body 10 is provided inside the door 2. The lock device main body 10 includes a lock case 11, and a bolt mechanism 12 is provided in the lock case 11. The lock device 1 according to this embodiment is an electric lock. Therefore, the bolt mechanism 12 includes a dead bolt, an electric actuator for moving the dead bolt, a power transmission mechanism that transmits power of the electric actuator to the dead bolt, a drive control circuit that controls driving of the electric actuator, and a drive control circuit. A battery is provided as a driving power source for supplying power. In addition, a latch bolt mechanism is incorporated in the lock device 1 according to the present embodiment. Therefore, the bolt mechanism 12 includes a latch bolt and a power transmission mechanism that transmits the movement of the outer lever handle 15 and the inner lever handle 18 to the latch bolt. Since the internal structure of such a bolt mechanism 12 is well known, detailed illustration is omitted.

  In addition, outside the door 2, the locking device 1 includes an outer escation 13, a cylinder unit 14, and an outer lever handle 15. The outer escation 13 is attached to the surface of the door 2 outside the room. The cylinder unit 14 is attached to the lock device main body 10 through an attachment hole 13 </ b> A provided in the outer escation 13. In the cylinder unit 14, a key hole 14 </ b> A is opened at the end on the outside of the room, and the end on the inside of the room is connected to a power transmission mechanism for moving a dead bolt in the bolt mechanism 12. In the outer lever handle 15, a grip portion 15 </ b> A is provided at an end portion outside the room, and the end portion inside the room is connected to a power transmission mechanism for moving a latch bolt in the bolt mechanism 12.

  In addition, inside the room of the door 2, the lock device 1 includes an inner escation 16, a thumb turn unit 17, and an inner lever handle 18. The inner escation 16 is attached to the inner surface of the door 2. The thumb turn unit 17 is attached to the lock device main body 10 through an attachment hole 16 </ b> A provided in the inner escation 16. In the thumb turn unit 17, a knob 17 </ b> A is provided at an end portion inside the room, and an end portion outside the room is connected to a power transmission mechanism for moving a dead bolt in the bolt mechanism 12. In the inner lever handle 18, a grip portion 18 </ b> A is provided at an end portion inside the room, and an end portion outside the room is connected to a power transmission mechanism for moving the latch bolt in the bolt mechanism 12.

  The locking device 1 includes a receiver 19, and the receiver 19 is attached to an attachment hole 16 </ b> B provided in the inner escation 16 inside the room of the door 2. Further, the lock device 1 includes a disassembly detection circuit 20 that detects when the lock device 1 is disassembled and sounds an alarm. The decomposition detection circuit 20 is a specific example of a decomposition detection unit and an alarm output unit. The receiver 19 and the decomposition detection circuit 20 will be described later.

  The basic locking / unlocking operation of the locking device 1 having such a configuration is as follows. That is, at the time of locking, the door 2 is made unopenable by fixing the dead bolt so as to protrude from the door 2. At the time of unlocking, the door 2 can be opened by moving the dead bolt so as to be pulled into the door 2. Such movement of the deadbolt is output from the outside of the lock device 1 (for example, an operation panel provided in the room or a card reader attached to the outside surface of the door 2 (both not shown)). This can be done by driving the electric actuator of the bolt mechanism 12 in accordance with the locking / unlocking control signal. Such a movement of the dead bolt can also be performed by operating a power transmission mechanism for moving the dead bolt in the bolt mechanism 12 by inserting a key in the key hole 14A of the cylinder unit 14 and rotating it. . Furthermore, such a movement of the dead bolt can also be performed by rotating the knob 17A of the thumb turn unit 17 and operating a power transmission mechanism for moving the dead bolt in the bolt mechanism 12.

  FIG. 2 shows a disassembly detection circuit and the like provided in the lock device 1. As shown in FIG. 2, the lock device 1 includes a disassembly detection circuit 20 that detects when the lock device 1 is disassembled and sounds an alarm.

  The decomposition detection circuit 20 includes four detection circuit units. The first detection circuit unit is a detection circuit unit that detects that the outer escation 13 has been removed from the door 2, and includes a detection unit 21, terminals 22 </ b> A and 22 </ b> B, and a loop circuit unit 23. The detection unit 21 is provided on a substrate 37 disposed in the lock case 11. Two terminals 22A are provided in the lock case 11, and each terminal 22A is fixed to the lock case 11 so that one end side of the terminal 22A is exposed on a surface that contacts or faces the outer escation 13 in the lock case 11. . The other end side of each terminal 22A is connected to the detection unit 21 via a wiring cord or the like. When the lock case 11 is made of metal, an insulator is interposed between the terminal 22A and the lock case 11. Two terminals 22B are provided on the outer escation 13. Each terminal 22B is fixed to the outer escation 13 so that one end of the terminal 22B is exposed on the surface that contacts or faces the lock case 11 in the outer escation 13. ing. The other end side of one terminal 22B is connected to the other end side of the other terminal 22B via a wiring cord or the like.

  In the state where the lock device main body 10 is provided inside the door 2 and the outer escation 13 is attached to the outside surface of the door 2, each terminal 22 </ b> A and each terminal 22 </ b> B are in direct contact with each other, Are electrically connected. Thereby, the loop-shaped circuit part 23 which electrically connects between the locking device main body 10 and the outer side escation 13 is formed. On the other hand, when the outer escation 13 or the lock device main body 10 is removed from the door 2 and the outer escation 13 and the lock device main body 10 are separated from each other, the terminals 22A and the terminals 22B are not in contact with each other. The circuit portion 23 is cut. The detection unit 21 detects that the loop circuit unit 23 has been disconnected in this way, and outputs a disconnection detection signal indicating that the loop circuit unit 23 has been disconnected to the control unit 33.

  The second detection circuit unit is a detection circuit unit that detects that the cylinder unit 14 has been removed from the lock control device 10, and includes a detection unit 24, terminals 25 </ b> A and 25 </ b> B, and a loop circuit unit 26. Yes. The detection unit 24 is provided on the substrate 37 in the lock case 11. Two terminals 25 </ b> A are provided in the lock case 11, and each terminal 25 </ b> A is fixed to the lock case 11 so that one end side of the terminal 25 </ b> A is exposed on a surface that contacts or faces the cylinder unit 14 in the lock case 11. The other end side of each terminal 25A is connected to the detection unit 24 via a wiring cord or the like. When the lock case 11 is made of metal, an insulator is interposed between the terminal 25A and the lock case 11. Two terminals 25B are provided in the cylinder unit 14, and each terminal 25B is fixed to the cylinder unit 14 such that one end side of the terminal 25B is exposed on the surface of the cylinder unit 14 that contacts or faces the lock case 11. The other end of one terminal 25B is connected to the other end of the other terminal 25B via a wiring cord or the like.

  In the state in which the lock device main body 10 is provided inside the door 2 and the cylinder unit 14 is attached to the lock device main body 10, the terminals 25A and the terminals 25B are in direct contact with each other, and the space between them is electrically connected. Connected. Thereby, the loop-shaped circuit part 26 which electrically connects between the lock device main body 10 and the cylinder unit 14 is formed. On the other hand, when the cylinder unit 14 or the lock device main body 10 is detached from the door 2 and the cylinder unit 14 and the lock device main body 10 are separated from each other, the terminals 25A and the terminals 25B are not in contact with each other, and the loop circuit The part 26 is cut. The detection unit 24 detects that the loop circuit unit 26 has been disconnected in this way, and outputs a disconnection detection signal indicating that the loop circuit unit 26 has been disconnected to the control unit 33.

  The third detection circuit unit is a detection circuit unit that detects that the inner escation 16 has been removed from the door 2, and includes a detection unit 27, terminals 28 </ b> A and 28 </ b> B, and a loop circuit unit 29. . The detection unit 27 is provided on the substrate 37 in the lock case 11. Two terminals 28 </ b> A are provided in the lock case 11, and each terminal 28 </ b> A is fixed to the lock case 11 so that one end side of the terminal 28 </ b> A is exposed on a surface that contacts or faces the inner escation 16 in the lock case 11. . The other end side of each terminal 28A is connected to the detection unit 27 via a wiring cord or the like. When the lock case 11 is made of metal, an insulator is interposed between the terminal 28A and the lock case 11. Two terminals 28B are provided in the inner escation 16, and each terminal 28B is fixed to the inner escation 16 so that one end side of the terminal 28B is exposed on the surface that contacts or faces the lock case 11 in the inner escation 16. ing. The other end side of one terminal 28B is connected to the other end side of the other terminal 28B via a wiring cord or the like.

  In the state where the lock device main body 10 is provided inside the door 2 and the inner escation 16 is attached to the inner surface of the door 2, each terminal 28 </ b> A and each terminal 28 </ b> B are in direct contact with each other. Are electrically connected. Thereby, the loop-shaped circuit part 29 which electrically connects between the locking device main body 10 and the inner side escation 16 is formed. On the other hand, when the inner escation 16 or the lock device main body 10 is removed from the door 2 and the inner escation 16 and the lock device main body 10 are separated from each other, the terminals 28A and 28B do not come into contact with each other. The circuit portion 29 is cut off. The detection unit 27 detects that the loop circuit unit 29 has been disconnected in this way, and outputs a disconnection detection signal indicating that the loop circuit unit 29 has been disconnected to the control unit 33.

  The fourth detection circuit unit is a detection circuit unit that detects that the thumb turn unit 17 has been removed from the lock control device 10, and includes a detection unit 30, terminals 31 </ b> A and 31 </ b> B, and a loop circuit unit 32. Yes. The detection unit 30 is provided on the substrate 37 in the lock case 11. Two terminals 31 </ b> A are provided in the lock case 11, and each terminal 31 </ b> A is fixed to the lock case 11 so that one end side of the terminal 31 </ b> A is exposed on a surface that contacts or faces the thumb turn unit 17 in the lock case 11. The other end of each terminal 31A is connected to the detection unit 30 via a wiring cord or the like. When the lock case 11 is made of metal, an insulator is interposed between the terminal 31 </ b> A and the lock case 11. Two terminals 31B are provided in the thumb-turn unit 17, and each terminal 31B is fixed to the thumb-turn unit 17 so that one end side of the terminal 31B is exposed on a surface that contacts or faces the lock case 11 in the thumb-turn unit 17. The other end of one terminal 31B is connected to the other end of the other terminal 31B via a wiring cord or the like.

  In a state where the lock device main body 10 is provided inside the door 2 and the thumb turn unit 17 is attached to the lock device main body 10, the terminals 31A and the terminals 31B are in direct contact with each other, and the respective terminals are electrically connected to each other. Connected. Thereby, the loop-shaped circuit part 32 which electrically connects between the locking device main body 10 and the thumb turn unit 17 is formed. On the other hand, when the thumb turn unit 17 or the lock device main body 10 is removed from the door 2 and the thumb turn unit 17 and the lock device main body 10 are separated from each other, the terminals 31A and 31B do not contact each other, and the loop circuit The part 32 is cut. The detection unit 30 detects that the loop circuit unit 32 has been disconnected in this way, and outputs a disconnection detection signal indicating that the loop circuit unit 32 has been disconnected to the control unit 33.

  The disassembly detection circuit 20 includes a control unit 33 and a buzzer 34. The control unit 33 is provided on the substrate 37 in the lock case 11, and is connected to the detection units 21, 24, 27, 30 and the buzzer 34 on the substrate 37 via a wiring pattern or the like. When the control unit 33 receives a disconnection detection signal from at least one of the detection units 21, 24, 27 and 30, the control unit 33 outputs an alarm output signal to the buzzer 34 to output a buzzer sound as an alarm to the buzzer 34. Output. The buzzer 34 is provided on the substrate 37 and outputs a buzzer sound by an alarm output signal from the control unit 33.

  Further, the receiver 19 is connected to the control unit 33 via a wiring cord or the like. The receiver 19 can perform wireless communication with, for example, a dedicated transmission device via infrared rays or the like. When an alarm off signal is transmitted from the transmission device, the alarm off signal is received by the receiver 19 and input to the control unit 33. When the alarm off signal is input, the control unit 33 is turned off, and even if a disconnection detection signal is output from each of the detection units 21, 24, 27, and 30, the alarm output signal is not output to the buzzer 34. On the other hand, when an alarm on signal is transmitted from the transmission device and the alarm on signal is input to the control unit 33 via the receiver 19, the control unit 33 is turned on, and the detection units 21, 24, 27, and 30 When the disconnection detection signal is output, an alarm output signal is output to the buzzer 34.

  In the lock case 11, a dedicated power source 35 and a charging circuit 36 are provided on the substrate 37. The dedicated power source 35 is a power source that supplies power for operating the detection units 21, 24, 27, 30, the loop circuit units 23, 26, 29, 32, the control unit 33, and the buzzer 34, for example, a storage battery It is. The power supply wiring between the detection units 21, 24, 27 and 30, the loop circuit units 23, 26, 29 and 32, the control unit 33 and the buzzer 34 and the dedicated power source 35 is not shown. . The dedicated power source 35 is a power source different from the driving power source for driving the electric actuator of the bolt mechanism 12. The dedicated power source 35 is accommodated in the lock case 11 so that it cannot be taken out unless the lock case 11 is disassembled. The charging circuit 36 is a circuit for charging the dedicated power source 35 using a driving power source for driving the electric actuator of the bolt mechanism 12. For example, the charging circuit 36 charges the dedicated power source 35 when a battery that is a driving power source is replaced.

  The operation of the disassembly detection circuit 20 having such a configuration is as follows. For example, a room manager or the like keeps the control unit 33 in an on state during normal times. When the controller 33 is in the ON state, for example, if an unauthorized person removes the inner escation 16 of the lock device 1 from the door 2 from the inside of the room, the loop circuit portion 29 is cut. When the loop circuit unit 29 is disconnected, the detection unit 27 detects that fact and outputs a disconnection detection signal to the control unit 33. The control unit 33 that has received the disconnection detection signal outputs an alarm output signal to the buzzer 34. As a result, the buzzer 34 outputs a buzzer sound as an alarm.

  Further, even if the fraudster removes the cylinder unit 14 without removing the inner escation 16 from the door 2 using, for example, a cutting tool or the like, the loop-shaped circuit portion 23 is thereby cut. The detection unit 21 detects this and outputs a cutting detection signal to the control unit 33. The control unit 33 that has received the disconnection detection signal outputs an alarm output signal to the buzzer 34, and as a result, a buzzer sound is output from the buzzer 34. Similarly, when a fraudster removes the thumb turn unit 17 and the outer escation 13, a buzzer sound is output from the buzzer 34.

  As described above, when any one of the inner escation 16, the cylinder unit 14, the thumb turn unit 17 and the outer escation 13 is removed from the lock device body 10 or the door 2, a buzzer sound is output. As a result, the administrator or the like can know that the lock device 1 has been disassembled by the fraudulent person, discover the fraudulent act at an early stage, and perform the act of replacing the cylinder unit or theft by the fraudulent person. Can be prevented. In addition, while the buzzer is sounding, it becomes difficult for the fraudster to continue psychologically psychologically, so that the fraudulent person can be prevented from performing the fraud.

  Also, if an unauthorized person removes the battery, which is a driving power source for driving the electric actuator of the bolt mechanism 12, or disconnects the wiring connected to the driving power source, the cylinder unit 14 or the like is removed. Even when an external action is performed, the disassembly detection circuit 20 operates with a dedicated power source 35 that is different from the drive power source, so that a buzzer sound is output from the buzzer 34. As a result, even if the fraudster assumes that the function of the lock device 1 will stop if the drive power (main power) is turned off, the buzzer will be heard as a result of the removal. Since it is output, it is possible to prevent continued fraud.

  On the other hand, when the cylinder unit 14 needs to be replaced or the lock device 1 needs to be repaired for a valid reason, the administrator or an operator who has received a request from the administrator changes the lock device 1 from the transmission device. An alarm off signal is transmitted and the control unit 33 is turned off, and then the lock device 1 is disassembled. In this case, even if any of the inner escation 16, the cylinder unit 14, the thumb turn unit 17, and the outer escation 13 is removed, no buzzer sound is output. Thereby, replacement | exchange of the cylinder unit 14 for a valid reason and repair of the lock device 1 can be performed appropriately.

  In the above-described embodiment, the outer escation 13, the cylinder unit 14, the inner escation 16, and the thumb turn unit 17 are set as an example of the detection target for performing the removal detection by the decomposition detection circuit 20. The present invention is not limited to this. For example, only the cylinder unit 14 that is the target of replacement by an unauthorized person may be set as the detection target, or only the inner escation 16 that is most likely to be removed first when the removal action is started is detected. It is good also as a thing. Further, only the inner escation 16 and the outer escation 13 that are exteriors may be set as detection objects, or only the cylinder unit 14 and the thumb turn unit 17 that are internal parts may be set as detection objects. Furthermore, components constituting the lock device 1 other than the outer escation 13, the cylinder unit 14, the inner escation 16, and the thumb turn unit 17 can be set as detection objects.

  In the above-described embodiment, any one of the outer escation 13, the cylinder unit 14, the inner escation 16, and the thumb turn unit 17 is obtained by separating the terminals 22A, 25A, 28A, 31A and the terminals 22B, 25B, 28B, 31B. However, the present invention is not limited to this. For example, the lock device body 10 and each of the outer escation 13, the cylinder unit 14, the inner escation 16 and the thumb turn unit 17 are directly connected by a wiring cord, and any of these wiring cords is cut. It is good also as a structure which recognizes that either the outer escation 13, the cylinder unit 14, the inner escation 16, or the thumb turn unit 17 has been removed from the lock device body 10 or the door 2 by detecting. However, as in the above-described embodiment, the disassembly detection circuit 20 can be easily formed by using the terminals 22A, 25A, 28A, 31A and the terminals 22B, 25B, 28B, 31B. Also good.

  In the above-described embodiment, any one of the outer escation 13, the cylinder unit 14, the inner escation 16, and the thumb turn unit 17 is detected by electrically detecting the disconnection of the loop circuit portions 23, 26, 29, and 32. However, the present invention is not limited to this. For example, a switch is provided between the lock device main body 10 and each of the outer escation 13, the cylinder unit 14, the inner escation 16 and the thumb turn unit 17. When each of 17 is attached to the lock device main body 10 or the door 2, each switch is turned on, and the outer escation 13, the cylinder unit 14, the inner escation 16 and the thumb turn unit 17 are respectively connected to the lock device main body 10 or the door. Each switch is turned off when the switch is removed from 2, and any one of the outer escation 13, the cylinder unit 14, the inner escation 16 and the thumb turn unit 17 is locked when any switch is turned off. Device book It may recognize structure that has been removed from the 10 or the door 2.

  In the embodiment described above, a buzzer sound is output as an alarm when any of the outer escation 13, the cylinder unit 14, the inner escation 16 and the thumb turn unit 17 is removed from the lock device body 10 or the door 2. However, the present invention is not limited to this. As an alarm, the lamp may be turned on or blinked, or an alarm signal may be transmitted to the outside of the lock device 1.

  In the above-described embodiment, the case where the lock device 1 is an electric lock has been described as an example. However, the present invention can also be applied to a lock device that is not an electric lock. In the above-described embodiment, the latch device 1 of the type in which the latch bolt mechanism and the lever handles 15 and 18 are integrally incorporated is taken as an example. However, the present invention is provided with the latch bolt mechanism and the lever handle. It can also be applied to other types of locking devices.

  The present invention can be modified as appropriate without departing from the spirit or concept of the invention which can be read from the claims and the entire specification, and a lock device accompanying such a change is also included in the technical concept of the present invention. included.

DESCRIPTION OF SYMBOLS 1 Locking device 2 Door 10 Locking device main body 11 Locking case 12 Bolt mechanism 13 Outer escation (one side escation)
14 Cylinder unit 16 Inside escation (other side escation)
17 Thumb turn unit 20 Disassembly detection circuit (disassembly detection means)
21, 24, 27, 30 Detector 22A, 22B, 25A, 25B, 28A, 28B, 31A, 31B Terminal 23, 26, 29, 32 Loop circuit (electric circuit)
33 Control unit 34 Buzzer (alarm output means)
35 Dedicated power supply

Claims (6)

A locking device that is attached to the door and makes it impossible to open the door when locked,
A lock case, and a lock mechanism provided in the lock case, and having a bolt mechanism that prevents the door from opening by fixing the bolt in a state of protruding from the door during locking. The device body;
One-side escation attached to one side of the door;
A cylinder unit that is attached to the lock device main body on one side of the door, has a keyhole, and operates the bolt mechanism by inserting a key into the keyhole to perform locking and unlocking;
The other side escation attached to the other side of the door;
A thumb turn unit attached to the lock device main body on the other surface side of the door, having a knob, and operating the knob to operate the bolt mechanism to perform locking and unlocking;
Disassembly detection means for detecting that a detection object that is at least one of the one-side escation, the cylinder unit, the other-side escation, and the thumb-turn unit is removed from the lock device main body or the door; ,
An alarm output means for outputting an alarm when the disassembly detection means detects that the detection object has been removed from the lock apparatus main body or the door.   The disassembly detection means includes an electric circuit that electrically connects the detection object and the lock device main body, and detects that the electric circuit is disconnected. The locking device as described.   The lock device main body and the detection target are provided with terminals that are in contact with each other in a state where the detection target is attached to the lock device main body or the door and connected in the middle of the electric circuit. The locking device according to claim 2. The bolt mechanism is driven by electric power supplied from a driving power source provided outside or inside the locking device, and has an electric actuator that moves the bolt to perform an unlocking operation,
In the lock device, a dedicated power source different from the driving power source is provided to supply power for operating the disassembly detection unit and the alarm output unit to the disassembly detection unit and the alarm output unit. The locking device according to claim 2 or 3, characterized in that   5. The lock device according to claim 1, wherein the alarm output means is a buzzer. Each of the one side escation, the cylinder unit, the other side escation, and the thumb turn unit is the detection object,
The disassembly detection means detects, for each detection object, that the detection object is removed from the lock device main body or the door,
The alarm output means outputs an alarm when one of the detection objects is removed from the lock device main body or the door based on a detection result of the disassembly detection means. The locking device according to any one of 5.

Images