JP2010229679A - Auxiliary lock device and crime prevention door system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary lock device and a crime prevention door system allowing a resident to confirm visitor's face while a door is half-opened and open the door easily when unlocking. <P>SOLUTION: This crime prevention door system 10 includes a main locking device 30 for locking the door 20 and the auxiliary lock device 40. The auxiliary lock device 40 has an electromagnet 50, a driving means 60, an unlocking means 70, a time counting means 80, and a control means 90. The electromagnet 50 is stored in a metallic case 52 having a circular cylindrical shape and is supported to move in the direction for opening the door by only the predetermined distance. A calling means 100 outputs a call signal when operated by a visitor. The control means 90 supplies electric power to the electromagnet 50 through the driving means 60 by the call signals to attract the door 20. The door 20 is opened up to the electromagnet 50 movable distance, and its opening operation is regulated at a position where it is half-opened. When the unlocking means 70 is operated to unlock the door after confirming visitor's face, power supply to the electromagnet 50 is stopped to unlock the auxiliary lock device 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an auxiliary lock device and a security door system, and more particularly to an auxiliary lock device and a security door system that locks a door that is opened at a predetermined angle.

  For example, a door for each room of a condominium or a door of each house is provided with a main locking device for inserting and unlocking a key from the outside, and an auxiliary locking device for locking and unlocking only from the inside. The main locking device is provided with an operation knob on the inside of the door so that the locking or unlocking operation can be performed from the inside of the door.

  As an auxiliary lock device, generally, a chain structure in which the tip of the chain is hooked in a groove on the inner side of the door (see, for example, Patent Document 1), and a metal bar is placed on the protruding portion protruding to the inner side of the door. There is a guard arm structure that hooks a guard arm bent in a letter shape (see, for example, Patent Document 2).

  In addition, intercoms are provided near the doors of apartments and houses, and visitors' names and requirements can be visited through the intercoms while the doors are locked. Furthermore, when checking the visitor's face directly, the main locking device is unlocked while the auxiliary locking device is in the locked state, so that the door is opened at a predetermined angle and the visitor's face is checked. Has been done.

  Thus, when the door is opened halfway, the auxiliary locking device is in the locked state, so that the door is opened by a distance corresponding to the length of the chain or guard arm (about 7 cm to 8 cm from the door frame). It is regulated not to open in the opening direction.

  Further, as a locking device other than the chain structure or the guard arm structure, there is also a locking device having a structure for attracting a door to a closed position using an electromagnet (for example, see Patent Document 3).

JP 2005-180154 A JP-A-9-303030 JP 2004-245041 A

  The auxiliary lock device of Patent Documents 1 and 2 using the chain structure or guard arm structure described above is an unlocking operation for removing the chain or guard arm with the door closed once after confirming the visitor's face. Therefore, there is a problem that a troublesome operation such as opening the door in a half-open state after closing the door is performed. Another problem is that the visitor feels uncomfortable because the housekeeper who opened the door closed the door once he confirmed the visitor's face.

  Moreover, when using the locking device of patent document 3 which adsorb | sucks a door with an electromagnet as an auxiliary | assistant locking device, it can be easily unlocked by stopping the energization to an electromagnetic person, On the other hand, in the locked state In order to excite the electromagnet, it is necessary to continue energization of the electromagnet, which causes a problem of high power consumption. In addition, when the door is attracted by an electromagnet, the door cannot be opened halfway in the locked state, so the auxiliary lock device having the chain structure or the guard arm structure is used in combination, and the above problems are also involved. .

  In view of the above circumstances, an object of the present invention is to provide an auxiliary lock device and a security door system that solve the above-described problems.

In order to solve the above problems, the present invention has the following means.
(1) The present invention provides an auxiliary lock device for locking a door to a door frame fixed to a building.
An electromagnet provided on either the door or the door frame and attracting the door to a closed position;
Unlocking means for releasing the adsorption by the electromagnet;
A support mechanism for supporting the electromagnet adsorbing the door so as to be movable a predetermined distance in the opening direction of the door;
It is provided with.
(2) The present invention is the auxiliary lock device according to (1), wherein when a calling signal is supplied from the outside of the door, energization of the electromagnet is started to adsorb the door, and the unlocking means Control means for stopping energization of the electromagnet when operated is provided.
(3) The present invention is the auxiliary lock device according to (2), wherein the control means confirms that the unlocking means is operated when the door is opened.
(4) The present invention is the auxiliary lock device according to (2), wherein the control means is configured such that when the door is not opened until a predetermined time elapses after the calling signal is supplied, the electromagnet It is characterized in that the energization of is stopped.
(5) The present invention includes a main locking device that is locked and unlocked by inserting a key from the outside of the door or an operation from the inside of the door, and a lock and unlocking that is provided independently of the main locking device and operated from the inside of the door. In a security door system having an auxiliary lock device
The auxiliary locking device is
An electromagnet for adsorbing the door;
Unlocking means for releasing the adsorption by the electromagnet;
A support mechanism for supporting the electromagnet adsorbing the door so as to be movable a predetermined distance in the opening direction of the door;
Locking detection means for detecting that the main locking device is in a locked state or an unlocked state;
When a call signal from the outside is supplied, control means for starting energization to the electromagnet to generate electromagnetic force and stopping energization to the electromagnet when the unlocking means is operated,
It is provided with.
(6) The present invention is the security door system according to (5), wherein the control means detects that the main locking device is unlocked by the locking detection means, and then the auxiliary locking device. Is not unlocked by the operation of the unlocking means, the lock detecting means confirms that the main locking device is in a locked state.
(7) The present invention is the security door system according to (5), wherein the control means detects that the main locking device is unlocked by the locking detection means, and then the auxiliary locking device. Is not unlocked by the operation of the unlocking means, and when the lock detecting means detects that the main locking device is in the locked state, the electromagnet is energized when a predetermined time has elapsed. It is characterized by stopping.

  According to the present invention, after directly viewing the visitor's face, it is possible to stop the energization of the electromagnet by operating the unlocking means without opening the door and to open the door in the opening direction from the half-open state. It becomes possible.

  In addition, according to the present invention, the energization time to the electromagnet can be shortened to greatly reduce power consumption, and until the unlocking means is operated, even if the door is opened halfway, the electromagnet is attracted (locked). State) can be maintained, and security against crime can be further enhanced. Furthermore, when an operation for supplying a call signal (such as an interphone or buzzer switch) is performed to confirm absence of a vacant nest, the door is attracted by an electromagnet for a predetermined time from that point and switches to a locked state. , Crime prevention measures can be further strengthened.

It is a block diagram which shows schematic structure of one Example of the auxiliary | assistant lock apparatus and crime prevention door system by this invention. It is a figure which shows typically the state where the door 20 was locked in the closed position. It is a figure which shows typically the state which opened the door 20 halfway, locking the auxiliary | assistant lock apparatus 40. It is a figure which shows typically the state which unlocked the auxiliary | assistant lock apparatus 40, and opened the door. It is a longitudinal cross-sectional view which expands and shows the structure of the auxiliary | assistant lock apparatus 40 in a door closed state. It is a longitudinal cross-sectional view which expands and shows the structure of the auxiliary | assistant lock apparatus 40 in a door half open state. It is a flowchart which shows the control process 1 which the control means 90 performs. It is a flowchart which shows the control process 2 which the control means 90 performs. It is a flowchart which shows the control process 3 which the control means 90 performs. It is a longitudinal cross-sectional view which shows the modification 1 of the auxiliary | assistant lock apparatus 40 in a door closed state. It is a longitudinal cross-sectional view which shows the modification 1 of the auxiliary | assistant lock apparatus 40 in a door half open state. It is a longitudinal cross-sectional view which shows the modification 2 of the auxiliary | assistant lock apparatus 40 in a door closed state. It is a longitudinal cross-sectional view which shows the modification 2 of the auxiliary | assistant lock apparatus 40 in a door half open state.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an auxiliary lock device and a security door system according to the present invention. As shown in FIG. 1, the security door system 10 includes a main locking device 30 that locks the door 20 and an auxiliary locking device 40.

  The main locking device 30 has a cylinder lock 32 embedded in the handle 22 of the door 20. The cylinder lock 32 has a key hole 34 into which a key is inserted from the outside on the outside, and an operation knob 36 for operating locking and unlocking from the inside on the inside. Moreover, as the main locking device 30, the thing of the structure which has an auto-lock function which will be in a locked state automatically, when the door 20 is closed may be sufficient.

  The auxiliary lock device 40 includes an electromagnet 50, a drive unit 60, an unlocking unit 70, a time measuring unit 80, and a control unit 90. The electromagnet 50 is housed in, for example, a cylindrical metal case 52, supported by a pedestal 54 fixed to the top of the door frame 24 of the door 20 so that the metal case 52 attracts the top of the door 20, and It is supported so as to be movable only a predetermined distance in the door opening direction. The mounting position of the electromagnet 50 may be the upper part of the door 20 or may be provided at a position other than the upper part such as the lower part of the door 20.

  The drive means 60 is composed of a switching circuit that energizes the coil of the electromagnet 50 when locked according to a control signal from the control means 90 and turns on / off the energization of the electromagnet 50 when unlocked.

  The unlocking means 70 is provided on a wall surface in the vicinity of the door 20 and is in a position where the unlocking operation is easy after the visitor's face is confirmed. The unlocking means 70 is composed of, for example, a push-type unlocking switch, and outputs an unlocking signal to the control means 90 when pressed.

  The time measuring means 80 is composed of a timer that counts the energization time to the electromagnet 50 in the control process described later. The control means 90 is composed of a microcomputer or the like, and stores a control program for executing control processing described later.

  In addition, a calling unit 100 is provided on a wall surface outside (outdoor) of the door 20. Inside the door 20 (indoor), a notification unit 110, a door opening / closing detection unit 120, and a locking / unlocking detection unit 130 are provided.

  The calling unit 100 includes, for example, an interphone or a buzzer switch, and outputs a calling signal when a visitor operates. The notification unit 110 includes a speaker or the like that emits a ringing sound (chime sound or buzzer sound) when a call signal is input. The door opening / closing detection means 120 includes a magnet switch or an infrared sensor that detects whether or not the door 20 is in the closed position. For example, when the door 20 is operated in the opening direction, it outputs a door opening detection signal. When the door 20 is returned to the closed position, the door opening / closing detection means 120 stops outputting the door opening detection signal.

  The lock / unlock detection means 130 includes a switch or an optical sensor that detects whether the operation knob 36 is in the unlock position or the lock position, and is incorporated in the cylinder lock 32.

  Here, with reference to FIG. 2A-FIG. 2C, the operation | movement procedure of the door 20 and the auxiliary | assistant lock apparatus 40 is demonstrated. FIG. 2A is a diagram schematically illustrating a state in which the door 20 is locked in the closed position. FIG. 2B is a diagram schematically illustrating a state in which the door 20 is half-opened while the auxiliary lock device 40 is locked. FIG. 2C is a diagram schematically showing a state where the auxiliary lock device 40 is unlocked and the door 20 is opened.

  As shown in FIG. 2A, when the door 20 is in the closed position, the tip of the metal case 52 that houses the electromagnet 50 is in contact with the inside of the door 20. The other end of the metal case 52 is supported by a pedestal 54 fixed to the door frame 24 so as to be movable in the door opening direction.

  As shown in FIG. 2B, when the electromagnet 50 is energized, the auxiliary lock device 40 is locked. That is, the metal case 52 is brought into close contact with the inside of the door 20 by the electromagnetic force of the electromagnet 50. In this state, when the operation knob 36 of the main locking device 30 is rotated and unlocked, the door 20 can be moved in the opening direction.

  And since the metal case 52 of the electromagnet 50 adsorb | sucks the door 20, it follows the door 20 opening operation | movement, and moves to an opening direction (A direction). Further, the movement of the other end of the metal case 52 is restricted by the stopper of the pedestal 54 when the inside of the pedestal 54 fixed to the door frame 24 moves a predetermined distance.

  As a result, the door 20 stops at a half-open position opened from the door frame 24 by about 7 cm to 8 cm. In this state, the door 20 cannot be moved further in the opening direction, so that the face of the visitor can be directly confirmed from the gap between the door 20 and the door frame 24 and the intrusion of the visitor can be prevented. Is possible.

  As shown in FIG. 2C, when confirming a visitor's face and entering a visitor, when the unlocking means 70 is operated and an unlocking signal is input to the control means 90, the drive means 60 is de-energized. A signal is output. Thereby, the energizing force to the door 20 is released by stopping the energization of the electromagnet 50. Therefore, the restriction on the door 20 by the auxiliary lock device 40 is released, and the door 20 can be moved in the opening direction as it is. Therefore, when the housekeeper checks the face of the visitor and enters the visitor, it is not necessary to close the door 20 as in the conventional case, the energization to the electromagnet 50 is stopped, and the metal case 52 is moved to the door 20. After separating from the door, it is only necessary to move the door 20 in the opening direction.

  Here, the configuration of the support mechanism 150 provided inside the base 54 will be described.

  FIG. 3A is an enlarged longitudinal sectional view showing the structure of the auxiliary lock device in the door closed state. As shown in FIG. 3A, the electromagnet 50 is housed inside a cylindrical metal case 52 and is provided integrally with the metal case 52. One end of the metal case 52 has an abutting portion 52 a that abuts on the suction member 26 fixed inside the door 20. The adsorption member 26 is made of, for example, an iron plate and is fastened to the inside of the door 20 by fastening means such as screws.

  Further, the other end of the metal case 52 is formed with a flange portion 52b protruding in the radial direction. The flange portion 52 b is configured to receive a spring force with which the coil spring 56 is in contact and which returns the metal case 52 in a state where energization is stopped to the inside of the metal case 52.

  The pedestal 54 has a hollow portion 54a inside which the metal case 52 slides, and an end 54b through which the metal case 52 is inserted is provided at the end facing the door 20. A wall 54c with which the other end of the coil spring 56 abuts is provided at the peripheral edge of the opening 54b. The wall portion 54c also functions as a stopper that prevents the metal case 52 from falling off. The support mechanism 150 of this embodiment is configured by the pedestal 54 and the coil spring 56.

  As described above, when the main locking device 30 is unlocked from the inside in a state where the electromagnet 50 of the auxiliary lock device 40 is energized and the adsorption member 26 of the door 20 is adsorbed, the door 20 is moved to a predetermined distance (of the metal case 52). (Sliding distance) can be opened in the opening direction (A direction).

  As shown in FIG. 3B, when the door 20 is moved in the opening direction (direction A) with the electromagnet 50 of the auxiliary lock device 40 excited, the metal case 52 is integrated with the door 20 by the attractive force of the electromagnet 50. Therefore, it moves in the opening direction (A direction). The metal case 52 compresses the coil spring 56 between the flange portion 52b and the wall portion 54c, and when the compression of the coil spring 56 is completed, movement in the opening direction (A direction) is restricted.

  Therefore, in the locked state in which the electromagnet 50 of the auxiliary lock device 40 is excited, it is possible to move in the opening direction (A direction) until the flange portion 52b of the metal case 52 finishes compressing the coil spring 56. Therefore, even if a visitor tries to enter the house and tries to open the door 20 from the outside, the opening operation of the door 20 is blocked by the attractive force of the electromagnet 50 and the stopper function of the pedestal 54. Thus, in the locked state by the auxiliary lock device 40, the face of the visitor can be confirmed from the inside of the door 20, and the intrusion of the visitor can be prevented.

  Next, the control process 1 executed by the control unit 90 will be described. FIG. 4 is a flowchart showing the control process 1 executed by the control means 90.

  The control means 90 checks whether or not the calling signal from the calling means 100 is input in S01 shown in FIG. When the call signal is input in the process of S01 (in the case of YES), the process proceeds to the process of S02, and power supply to the electromagnet 50 is started. Thereby, the electromagnet 50 will be in the locked state which generate | occur | produces electromagnetic force.

  In the next process of S03, the time counting by the time measuring means 80 is started. Subsequently, in the process of S04, a signal output from the door opening / closing detection means 120 is read to check whether the door 20 has been opened. In the process of S04, when a door open signal is not output from the door opening / closing detection means 120 (in the case of NO), the process proceeds to the process of S05, and the time measured by the time measuring means 80 is set to a predetermined time (for example, 5 minutes). ) Is checked.

  In S05, when the time counted by the time measuring means 80 has not reached the predetermined time, the process returns to the above-mentioned S04, and the signal output from the door opening / closing detection means 120 is read again to determine whether the door 20 has been opened. To check. In S04, when a door opening signal is output from the door opening / closing detection means 120 (in the case of YES), the housekeeper operates the main locking device 30 to unlock the operation knob 36 from the inside to open the door 20 in the opening direction. It is confirmed that it has been moved.

  At this time, since the electromagnet 50 of the auxiliary lock device 40 is excited and locked, the door 20 can be opened to a half-open state (see FIG. 2B). Therefore, when the family member checks the visitor's face and opens the door 20, the unlocking means 70 is operated to output an unlock signal.

  Therefore, in S04, when a door open signal is output from the door opening / closing detection means 120 (in the case of YES), the process proceeds to S08 to check whether the unlocking means 70 is operated and an unlock signal is output. .

  In S08, when the unlocking means 70 is operated and the unlocking signal is not output (in the case of NO), it enters a standby state. For example, the householder operates the unlocking means 70 disposed in the vicinity of the door 20 to unlock. When a lock signal is output (in the case of YES), it progresses to S06 and the time measurement by the time measuring means 80 is complete | finished. In S05, when the time counted by the time measuring unit 80 reaches a predetermined time (in the case of YES), the process proceeds to S06, and the time counting by the time measuring unit 80 is terminated.

  Subsequently, in S07, the power supply to the electromagnet 50 by the driving means 60 is stopped, the electromagnet 50 is demagnetized, and the auxiliary lock device 40 is switched to the unlocked state.

  As described above, in the control process 1, when a call signal is input, power supply to the electromagnet 50 is started. Therefore, when a visitor does not come, the auxiliary lock device 40 is unlocked, and the door 20 Is locked by the main locking device 30.

  Therefore, when a visitor does not come, power supply to the electromagnet 50 is not performed, so that power consumption by the auxiliary lock device 40 is suppressed, power saving is promoted, and a power saving effect is enhanced. Further, while the housekeeper can lock the door 20 only by the auxiliary lock device 40, the door 20 can be opened halfway to check the face of the visitor, and when the visitor is put in, the unlocking means 70 is operated to release the door. If the lock signal is output, the attractive force of the electromagnet 50 is stopped and the unlocked state is entered, so that it is not necessary to close the door 20 as in the prior art, and the door 20 can be greatly opened without waiting for the visitor. It becomes possible.

  Furthermore, for example, when the number of family members is large and the number of family members coming and going is large, the main locking device 30 may not be set in the locked state, but when the visitor operates the calling means 100 and inputs a calling signal. Since the electromagnet 50 of the auxiliary lock device 40 is excited and switched to the locked state, it is possible to prevent intrusion by others. In particular, when the calling unit 100 for confirming the absence due to the empty nest is operated, the auxiliary lock device 40 is an effective intrusion preventing unit.

  Further, when the calling means 100 is not operated, the auxiliary locking device 40 does not operate. Therefore, when the housekeeper who has gone out returns home and unlocks the cylinder lock 32 of the main locking device 30 with the key, the normal locking device The door 20 can be opened and closed in the same manner as described above, and the main locking device 30 can be unlocked and locked from the inside of the door 20.

  Next, the control process 2 executed by the control unit 90 will be described. FIG. 5 is a flowchart showing the control process 2 executed by the control means 90. In FIG. 5, the processing of S11 to S18 is the same as S01 to S08 of FIG.

  Even if the auxiliary lock device 40 is locked and the door 20 is in a half-open state (see FIG. 2B) and the family member confirms the face of the visitor, the visitor may not want to open the door 20 any more. In such a case, the housekeeper closes the door 20 and operates the operation knob 36 of the main locking device 30 from the inside to the locked state.

  In S14, the control unit 90 reads the detection signal from the locking / unlocking detection unit 130 and checks whether or not the main locking device 30 has been unlocked. In S14, when the unlock detection signal is output from the unlock detection means 130 (in the case of YES), the process proceeds to S18, and it is checked whether the unlock means 70 is operated and the unlock signal is output. In S18, when the unlocking means 70 is operated and no unlocking signal is output (in the case of NO), the process proceeds to S19, in which the detection signal from the unlocking detecting means 130 is read and the main locking device 30 is locked. Check whether or not.

  In S19, when the lock detection signal is output from the lock / unlock detection means 130 (in the case of YES), it is confirmed that the main locking device 30 is locked, and it is determined that the householder has decided not to enter the visitor. be able to. Therefore, in S19, when the lock detection signal is output from the lock / unlock detection means 130 (in the case of YES), the process proceeds to S16, and the time measurement by the time measurement means 80 is terminated. Then, it progresses to S17, the electric power supply to the electromagnet 50 by the drive means 60 is stopped, the electromagnet 50 is demagnetized, and the auxiliary | assistant lock apparatus 40 is switched to an unlocking state.

  As described above, in the control process 2, when the main locking device 30 is locked without unlocking the auxiliary locking device 40 after the family member confirms the face of the visitor, the auxiliary locking device 40 is unlocked. Therefore, it becomes possible to reduce power consumption by the auxiliary lock device 40. Even when the main locking device 30 has an auto-lock function, it is locked when the housekeeper closes the door 20, so there is no problem in crime prevention even if the auxiliary locking device 40 is unlocked. It becomes possible to save electric power.

  Next, the control process 3 executed by the control unit 90 will be described. FIG. 6 is a flowchart showing the control process 3 executed by the control means 90. In FIG. 6, the processing of S21 to S29 is the same as S11 to S19 of FIG.

  When the lock detection signal is not output from the lock / unlock detection means 130 in S29 (in the case of NO), the control means 90 proceeds to S30 and is timed by the time measuring means 80 because the main lock device 30 is in the unlock state. It is checked whether or not the time has reached a preset second predetermined time (for example, 5 minutes).

  In S30, when the second predetermined time has not elapsed (in the case of NO), the process returns to S28, and the processes in S28 to S30 are repeated.

  In S30, if the second predetermined time has elapsed (in the case of YES), it is determined that the main locking device 30 is forgotten to be locked, and the process proceeds to S31, where the main locking device 30 is in the unlocked state. Is notified by issuing a warning (alarm sound) by the notification means 110. Thereby, the householder can notice that the main locking device 30 is forgotten to be locked, and can operate the main locking device 30 in the locked state.

  Here, a modified example of the auxiliary lock device 40 will be described.

  FIG. 7A is a longitudinal sectional view showing Modification 1 of the auxiliary lock device 40 in the door closed state. FIG. 7B is a longitudinal sectional view showing Modification 1 of the auxiliary lock device 40 in the door half-open state.

  As shown in FIG. 7A, in the first modification of the auxiliary lock device 40, the support mechanism 150 </ b> A is configured by a pedestal 54 and a link mechanism 160 attached to the hollow portion 54 a of the pedestal 54. The link mechanism 160 is formed by rotatably connecting a plurality of links 162 made of metal rods, one end is connected to a connecting portion 52c at the end of a metal case 52 housing the electromagnet 50, and the other end is a base 54. It is connected to a connecting portion 54d provided on the inner wall of this. Further, a return torsion spring 164 is wound around the connecting portion of each link 162.

  The link mechanism 160 is configured to expand and contract in accordance with the operation of the door 20. When the door 20 is in the closed state, each link 162 is folded into the pedestal 54 by the spring force of the torsion spring 164. It is stored in a state. In addition, the link mechanism 160 is attached so that each link 162 is rotated and extended when the door 20 is in a half-open state. Accordingly, when the door 20 moves in the opening direction in a locked state where the electromagnet 50 is energized and attracts the door 20, as shown in FIG. 7B, the doors 20 are moved until the links 162 are fully extended. Can be opened.

  Further, even if the door 20 is further moved in the opening direction from the state in which the plurality of links 162 are fully extended, the link mechanism 160 itself cannot be extended any more, so that the opening operation of the door 20 is restricted. And if a visitor's face is confirmed and the unlocking means 70 is operated, while electricity supply to the electromagnet 50 will stop, while the auxiliary | assistant lock apparatus 40 will be in an unlocking state, the metal case 52 is the torsion spring 164. Each link 162 is rotated in the return direction by the spring force and is stored in the hollow portion 54 a of the base 54.

  FIG. 8A is a longitudinal sectional view showing a second modification of the auxiliary lock device 40 in the door closed state. FIG. 8B is a longitudinal sectional view showing a second modification of the auxiliary lock device 40 in the door half-open state.

  As shown in FIG. 8A, in the second modification of the auxiliary lock device 40, the support mechanism 150 </ b> B is configured by a pedestal 54 and a wire mechanism 170 attached to the hollow portion 54 a of the pedestal 54. The wire mechanism 170 is formed by winding a metal wire 172 in a spiral shape (coil shape), one end is connected to a connection portion 52 c of the end portion of the metal case 52 that houses the electromagnet 50, and the other end is an inner wall of the pedestal 54. It is connected to a connecting portion 54d provided in.

  The wire mechanism 170 is configured to expand and contract in accordance with the operation of the door 20. When the door 20 is in the closed state, the metal wire 172 is accommodated in the base 54 in a coil shape. Further, the wire mechanism 170 is attached so that the metal wire 172 is pulled and extended when the door 20 is in a half-open state. Accordingly, when the door 20 moves in the opening direction while the electromagnet 50 is energized and attracts the door 20, the door 20 is moved until the metal wire 172 is fully extended as shown in FIG. 8B. Can be opened.

  Further, even when the door 20 is further moved in the opening direction from the state in which the metal wire 172 is fully extended, the metal wire 172 itself cannot be extended any more, so that the opening operation of the door 20 is restricted. When the unlocking means 70 is operated after the visitor's face is confirmed, the energization of the electromagnet 50 is stopped, the auxiliary locking device 40 is unlocked, and the metal case 52 is connected to the metal wire 172. It is housed in the hollow portion 54a of the base 54 by the returning operation.

  Needless to say, the support mechanism is not limited to those of the above-described embodiments and modifications 1 and 2.

  In the above embodiment, the security door system using the main locking device 30 and the auxiliary locking device 40 has been described. However, the present invention is not limited to this, and it is possible to use only the auxiliary locking device 40 alone.

  Moreover, in the said Example, although the structure provided with the main locking device 30 and the auxiliary | assistant locking device 40 was given as an example, it is not restricted to this, A several locking device or a some auxiliary locking device is combined. Can also be used.

  Moreover, in the said Example, although the thing of the structure which attaches the electromagnet 50 and the metal case 52 of the auxiliary | assistant lock apparatus 40 to the inner side of the door 20 was mentioned as an example, not only this but the base 54 is attached to the inner side of the door 20, The electromagnet 50 and the metal case 52 may be attracted to the door frame 24 side to restrict the opening direction position of the door 20 to the half-open position.

DESCRIPTION OF SYMBOLS 10 Security door system 20 Door 24 Door frame 26 Adsorption member 30 Main locking device 32 Cylinder lock 34 Key hole 36 Operation knob 40 Auxiliary locking device 50 Electromagnet 52 Metal case 54 Base 56 Coil spring 60 Driving means 70 Unlocking means 80 Timing means 90 Control means 100 Calling means 110 Notification means 120 Door opening / closing detection means 130 Locking / unlocking detection means 150, 150A, 150B Support mechanism 160 Link mechanism 162 Link 170 Wire mechanism 172 Metal wire

Claims (7)

In the auxiliary lock device that locks the door to the door frame fixed to the building,
An electromagnet provided on either the door or the door frame and attracting the door to a closed position;
Unlocking means for releasing the adsorption by the electromagnet;
A support mechanism for supporting the electromagnet adsorbing the door so as to be movable a predetermined distance in the opening direction of the door;
An auxiliary lock device comprising:   Control means for starting energization of the electromagnet when the call signal from the outside of the door is supplied, attracting the door, and stopping energization of the electromagnet when the unlocking means is operated The auxiliary locking device according to claim 1.   The auxiliary lock device according to claim 2, wherein the control means confirms that the unlocking means has been operated when the door is opened.   3. The auxiliary according to claim 2, wherein the control unit stops energization of the electromagnet when the door is not opened before a predetermined time elapses after the call signal is supplied. Locking device. A main locking device that locks and unlocks by inserting a key from the outside of the door or an operation from the inside of the door, and an auxiliary locking device that is provided independently of the main locking device and that is locked and unlocked by an operation from the inside of the door. In the security door system,
The auxiliary locking device is
An electromagnet for adsorbing the door;
Unlocking means for releasing the adsorption by the electromagnet;
A support mechanism for supporting the electromagnet adsorbing the door so as to be movable a predetermined distance in the opening direction of the door;
Locking detection means for detecting that the main locking device is in a locked state or an unlocked state;
When a call signal from the outside is supplied, control means for starting energization to the electromagnet to generate electromagnetic force and stopping energization to the electromagnet when the unlocking means is operated,
A security door system characterized by comprising   When the auxiliary detecting device is not unlocked by the operation of the unlocking means after the control detecting means detects that the main locking device is unlocked by the locking detecting means, the locking detecting means 6. The security door system according to claim 5, wherein it is confirmed that the main locking device is locked.   The control means, after the lock detection means detects that the main locking device is unlocked, the auxiliary lock device is not unlocked by the operation of the unlocking means, and the lock detection 6. The security door system according to claim 5, wherein when the main locking device is detected to be locked by means, energization to the electromagnet is stopped when a predetermined time has elapsed.

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