JP5404076B2 - Door control device - Google Patents

Description

  The present invention relates to a door control device that prevents, for example, a collision accident when the door is opened.

  There is a security system in which an authentication device is installed inside and outside a room, and the door of the room is unlocked when the authentication device authenticates a person entering or leaving the room.

JP 2006-66958 A

  The conventional security system has a problem in that when the door is opened inward (or outward), the door collides with a person on the opposite side of the door when the entrance / exit person vigorously opens the door.

  An object of the present invention is to prevent the door from colliding with a person on the opposite side of the door when the door is opened, for example.

  The door control device according to the present invention is based on input information input to an input device installed on the operation side with either the entrance side of the door locked with an electric lock or the exit side of the door as the operation side. An unlock determination unit that determines whether or not to unlock the electric lock using a CPU (Central Processing Unit), and an entrance of the door when the unlock determination unit determines that the electric lock is unlocked A non-operating side image captured by a camera installed on the non-operating side is defined as a display device installed on the operating side, with the side where the input device is not installed among the side and the exit side of the door as a non-operating side A display unit for displaying, and an unlocking unit for unlocking the electric lock after the non-operation side image is displayed by the display unit.

  According to the present invention, for example, the door can be prevented from colliding with a person on the opposite side of the door when the door is opened.

1 is a configuration diagram of a door control system 100 according to Embodiment 1. FIG. 1 is a diagram showing an outline of a door control system 100 according to Embodiment 1. FIG. 5 is a flowchart showing a door control method of the controller 200 in the first embodiment. The figure which shows the outline | summary of the door control system 100 in Embodiment 2. FIG. 9 is a flowchart showing a door control method of the controller 200 in the second embodiment. FIG. 10 is a diagram illustrating an outline of a door control system 100 according to a third embodiment. 10 is a flowchart illustrating a door control method (priority side) of the controller 200 according to Embodiment 3. 10 is a flowchart showing a door control method (non-priority side) of controller 200 in the third embodiment.

Embodiment 1 FIG.
A door control system that unlocks the door and prevents a collision accident when the door is opened when the user is authenticated will be described.

FIG. 1 is a configuration diagram of a door control system 100 according to the first embodiment.
The structure of the door control system 100 in Embodiment 1 is demonstrated below based on FIG.

  The door control system 100 includes a door 111 that is locked and unlocked by an electric lock 112 (denoted as “E”) at the entrance of a room where entry is restricted, and both sides of the door 111 (outside of the room [inlet side], A card reader, monitor and camera are provided on the indoor side [exit side].

The card reader wirelessly reads data recorded on the IC card from an IC card brought close to contact or non-contact. Hereinafter, data recorded on the IC card is referred to as “card information”.
The camera images before and after the door (around the door). Hereinafter, an image captured by the camera is referred to as a “camera image”.

Hereinafter, the card reader, monitor, and camera installed outside the room are referred to as the outdoor card reader 121, the outdoor monitor 131, and the outdoor camera 141.
The card reader, monitor, and camera installed inside the room are referred to as an indoor card reader 122, an indoor monitor 132, and an indoor camera 142.

  Furthermore, the door control system 100 includes an electric lock 112, a controller 200 (an example of a door control device) that controls indoor and outdoor card readers, monitors, and cameras.

  The controller 200 includes an authentication unit 210 (an example of an unlocking determination unit), a camera control unit 220, a monitor control unit 230 (an example of a display unit), a card reader control unit 240, and an electric lock control unit 250 (an example of an unlocking unit). And a card information storage unit 290.

  The authentication unit 210 determines whether to unlock the electric lock 112 based on the card information read by the outdoor card reader 121 or the indoor card reader 122, using a CPU (Central Processing Unit).

  The camera control unit 220 controls the outdoor camera 141 and the indoor camera 142, and acquires a camera image that captures the door periphery from the outdoor camera 141 and the indoor camera 142.

  When it is determined by the authentication unit 210 that the electric lock 112 is unlocked, the monitor control unit 230 is installed on the side where the card information is read (hereinafter referred to as “operation side”) between the outdoor side and the indoor side. A camera image captured by a camera installed on the non-operating side (hereinafter referred to as “non-operating side”) of the outdoor side and the indoor side is displayed on the monitor.

  After the non-operating camera image is displayed on the monitor on the operation side by the monitor control unit 230, the card reader control unit 240 generates a predetermined authentication sound for notifying the unlocking of the electric lock 112 from the card reader on the operation side. Sound. The outdoor card reader 121 and the indoor card reader 122 have a speaker inside.

  The electric lock control unit 250 unlocks the electric lock 112 after the card reader control unit 240 generates an authentication sound from the operation side card reader.

The card information storage unit 290 is a storage device that stores user identification information (an example of card information) set in an ID card (an example of an IC card) of a user permitted to enter the room as registration data. .
Hereinafter, it is assumed that registration data is stored in the card information storage unit 290 in advance.

  The controller 200 includes a CPU and a storage device (for example, ROM, RAM, magnetic disk device) (not shown).

  The storage device stores an OS (Operating System), a program group, and a file group.

  The program group includes a program that executes a function described as “unit” in the embodiment. The program is read and executed by the CPU. That is, the program causes the computer to function as “to part”, and causes the computer to execute the procedures and methods of “to part”.

  The file group includes various data (input, output, determination result, calculation result, processing result, etc.) used in “˜unit” described in the embodiment.

  In the embodiment, arrows included in the configuration diagrams and flowcharts mainly indicate input and output of data and signals.

  In the embodiment, what is described as “to part” may be “to circuit”, “to apparatus”, and “to device”, and “to step”, “to procedure”, and “to processing”. May be. That is, what is described as “to part” may be implemented by any of firmware, software, hardware, or a combination thereof.

FIG. 2 is a diagram showing an overview of the door control system 100 according to the first embodiment.
The outline | summary of the door control system 100 in Embodiment 1 is demonstrated below based on FIG.

The person A who wants to enter the room causes the outdoor card reader 121 to read the card information of the ID card.
The authentication unit 210 of the controller 200 authenticates the person A based on the card information read by the outdoor card reader 121.
In the case of the authentication OK, the monitor control unit 230 displays the camera image taken around the indoor door taken by the indoor camera 142 on the outdoor monitor 131, and the electric lock control unit 250 displays the indoor side on the outdoor monitor 131. After the camera image is displayed, the electric lock 112 is unlocked.
The person A checks whether or not the person B is around the door on the indoor side with the outdoor monitor 131, and opens the door 111 with care to enter the room.

FIG. 3 is a flowchart showing a door control method of controller 200 in the first embodiment.
The door control method of the controller 200 in Embodiment 1 is demonstrated below based on FIG.
Each “˜unit” of the controller 200 executes processing (S110 to S131) described below using the CPU.

A person who wants to enter (or leave) places the ID card close to a card reader (outdoor card reader 121 or indoor card reader 122, the same applies hereinafter). Hereinafter, a person who brings an ID card close to a card reader is referred to as an “operator”.
In the ID card, information for identifying the operator is recorded in advance as card information.
The card reader reads card information from the approached ID card by wireless communication, and outputs the read card information to the controller 200.
Hereinafter, the side of the outdoor side and the indoor side where the card reader that reads the card information is installed is referred to as the “operation side”, and the card reader that reads the card information is installed between the outdoor side and the indoor side. The non-operating side is called “non-operating side”.

<S110>
The authentication unit 210 inputs card information read from the operator's ID card from a card reader on the operation side.
After S110, the process proceeds to S111.

<S111>
The authentication unit 210 collates the card information input in S110 with a plurality of registration information stored in advance in the card information storage unit 290, and determines whether the card information matches any registration information.
Hereinafter, the case where the card information matches any registration information is referred to as “verification OK”, and the case where the card information does not match any registration information is referred to as “verification NG”.
“Verification OK” means that the operator is authenticated (authentication OK) and the electric lock 112 is unlocked.
After S111, the process proceeds to S112.

<S112>
If “verification is OK” in S111 (YES), the process proceeds to S120.
If “verification NG” in S111 (NO), the door control method processing ends.

<S120>
The camera control unit 220 controls the non-operating camera (the outdoor camera 141 or the indoor camera 142, the same shall apply hereinafter) to cause the non-operating camera to capture a camera image of the periphery of the non-operating door, Input camera images from the non-operating camera.
After S120, the process proceeds to S121.

<S121>
The monitor control unit 230 outputs the non-operation-side camera image input in S120 to the operation-side monitor (the outdoor monitor 131 or the indoor-side monitor 132, the same shall apply hereinafter) to the operation-side monitor. Display video.
After S121, the process proceeds to S130.

<S130>
The card reader control unit 240 controls the operation side card reader to cause the operation side card reader to emit an authentication sound. The authentication sound is a predetermined sound for notifying the operator that the electric lock 112 is unlocked.
After S130, the process proceeds to S131.

<S131>
The electric lock control unit 250 controls the electric lock 112 to unlock the electric lock 112.
After S131, the door control method process ends.

The operator looks at the camera image displayed on the monitor on the operation side and confirms whether or not there is a person behind the door 111.
The operator opens the door 111 with care so that a person behind the door 111 does not collide with the door 111 and a person behind the door 111 does not collide with himself. (Or leave).

In the first embodiment, the door control system 100 has been described that informs the person entering (withdrawing) that there is a person on the opposite side of the door when entering (leaving) the room.
Thereby, the person who enters (leaves) a room can recognize the person who is on the opposite side of the door when entering (leaving) the room.

In the first embodiment, a card reader is an example of an input device for inputting operator identification information.
For example, instead of a card reader, a biometric authentication device that reads biometric information such as fingerprints, finger veins, and irises may be used. In this case, the authentication unit 210 authenticates the operator by comparing the biometric information read by the biometric authentication device with the registration information registered in the storage device in advance.

  In addition to displaying the non-operating camera image on the operating monitor, the operating camera image may be displayed on the non-operating monitor.

Embodiment 2. FIG.
A form in which the door is unlocked after the person on the other side of the door disappears will be described.
Hereinafter, items different from the first embodiment will be mainly described. Matters whose description is omitted are the same as those in the first embodiment.

The configuration of the door control system 100 is the same as that of the first embodiment (see FIG. 1).
When it is determined by the authentication unit 210 that the electric lock 112 is unlocked, the camera control unit 220 (an example of a human detection unit) uses the CPU to determine whether there is a person on the non-operation side based on the camera image on the non-operation side. To do.
The electric lock control unit 250 unlocks the electric lock 112 when the camera control unit 220 determines that there is no person on the non-operation side or when a predetermined time has elapsed, whichever comes first.
The card reader control unit 240 (an example of a caution unit) sounds a sound from the non-operation side card reader when the predetermined time has elapsed, and alerts the person on the non-operation side, and also operates the card reader on the operation side. A sound is emitted from the device to alert the operator.

FIG. 4 is a diagram illustrating an outline of the door control system 100 according to the second embodiment.
The outline | summary of the door control system 100 in Embodiment 2 is demonstrated below based on FIG.

Person B who wants to leave the room causes the indoor card reader 122 to read the card information of the ID card.
The authentication unit 210 of the controller 200 authenticates the person B based on the card information read by the indoor card reader 122.
In the case of the authentication OK, the monitor control unit 230 displays the camera image captured by the outdoor camera 141 on the indoor monitor 132, and the camera control unit 220 displays the outdoor image based on the camera image captured by the outdoor camera 141. Determine if there are people around the door.
The electric lock control unit 250 unlocks the electric lock 112 after waiting for a person to disappear around the outdoor door.
If a person does not disappear from the vicinity of the outdoor door even after a lapse of a certain time, the card reader control unit 240 sounds a caution sound from the outdoor card reader 121, and the electric lock control unit 250 unlocks the electric lock 112.
The person B confirms that the person A is around the door on the outdoor side by the indoor monitor 132 and opens the door 111 with caution to leave the room. Also, the person A hears a caution sound from the outdoor card reader 121 and leaves the door 111.

FIG. 5 is a flowchart showing a door control method of controller 200 in the second embodiment.
The door control method of the controller 200 in Embodiment 2 is demonstrated below based on FIG.

<S110 to S112>
As in the first embodiment, the authentication unit 210 performs authentication processing by comparing card information with registration information.
In the case of “verification OK”, the process proceeds to S113, and in the case of “verification NG”, the process of the door control method ends.

<S113>
The camera control unit 220 sets “0” and initializes the variable “n”. The variable n is a variable for counting the number of times (loop number) that a loop process (S120 to S116) described later has been processed.
After S113, the process proceeds to S120.

<S120 to S121>
As in the first embodiment, the camera control unit 220 inputs camera video from the non-operation side camera (S120), and the monitor control unit 230 displays the non-operation side camera video on the operation side monitor (S121).
After S121, the process proceeds to S122.

<S122>
The camera control unit 220 determines whether there is a person around the non-operation side door based on the non-operation side camera image input in S120.
For example, by using the technique disclosed in Patent Document 1, it is possible to determine whether or not there is a person based on the camera video.
After S122, the process proceeds to S123.

<S123>
If it is determined in S122 that there is a person around the non-operation side door (YES), the process proceeds to S114.
When it is determined in S122 that there is no person around the non-operation side door (NO), the process proceeds to S130a.

<S114>
The camera control unit 220 compares the variable n with a predetermined threshold “M”. The threshold value M indicates the maximum value of the number of times the loop process (S120 to S116) is processed.
If “n> = M” (YES), the process proceeds to S130b.
If “n <M” (NO), the process proceeds to S115.

<S115>
The camera control unit 220 adds “1” to the variable n.
After S115, the process proceeds to S116.

<S116>
Here, the processing stops for a certain period of time “T”. The fixed time T is assumed to be predetermined.
After a predetermined time T has elapsed, the process returns to S120.

  Thereafter, S120 to S116 are repeatedly executed until it is determined in S123 that there is no person around the non-operating door or until “n> = M” in S114.

<S130a>
When it is determined in S123 that there is no person around the non-operation side door (NO), the card reader control unit 240 sounds the authentication sound A from the operation side card reader, as in S130 of the first embodiment.
After S130a, the process proceeds to S131.

<S130b>
When “n> = M” in S114 (YES), the card reader control unit 240 controls the non-operation side card reader to cause the non-operation side card reader to emit a warning sound. The caution sound is a predetermined sound for notifying the person on the non-operation side that the door 111 is opened.
After S131b, the process proceeds to S130c.

<S130c>
The card reader control unit 240 sounds the authentication sound B from the operation side card reader, as in S130 of the first embodiment. The authentication sound B is a sound different from the authentication sound A, and notifies the operator that the electric lock 112 is unlocked and that a person is behind the door 111.
After S130c, the process proceeds to S131.

<S131>
The electric lock control unit 250 controls the electric lock 112 to unlock the electric lock 112.
After S131, the door control method process ends.

Variable n (number of state confirmations before door), fixed time T (state confirmation interval before door) and threshold value M (maximum number of state confirmations) may be set according to the installation location.
Adjusting the value of the number of state confirmations (n) in front of the door is effective in preventing a collision without making the operator aware when the person in front of the door moves quickly by delaying authentication. It is.
The value of the state confirmation interval (T) before the door can be made smaller (shorter) as the processing capability of the controller 200 is higher, and larger (longer) as the processing capability of the controller 200 is lower. When the state confirmation interval (T) in front of the door is reduced, the time until it can be detected that there is no person behind the door is shortened. Conversely, when the state confirmation interval (T) in front of the door is increased, the time until it can be detected that no one is behind the door is increased.
The value of the maximum number of state confirmation (M) varies depending on the operation. Even if the authentication delay time becomes long, if it is desired to open the door 111 with no people behind the door 111 as much as possible, the maximum number of state confirmation (M) is set large. Conversely, if the authentication delay time is shortened due to heavy traffic, etc., and it is only necessary to call attention to both the operator and the person on the other side of the door 111, the maximum number of state checks (M) is reduced. Set.

When the person on the other side of the door 111 moves within the maximum authentication delay time (T × M) by the processing described in FIG. 5, there is a person on the other side of the door 111 without making the operator aware of it. The door 111 can be opened after it disappears. Thereby, a collision with an operator and the person behind the door 111 can be prevented.
Also, if the person behind the door 111 has not moved within the maximum authentication delay time (T × M), the operator and the person behind the door 111 are alerted and the operator and Collisions with people on the other side of the door 111 can be prevented.

In the second embodiment, the authentication sound and the caution sound are examples of information that alerts the operator and the person on the opposite side of the door 111.
For example, instead of outputting an authentication sound or a caution sound from the card reader, a message (characters or images) notifying the operator that the electric lock 112 is unlocked, and that the operator is on the other side of the door 111 A message that informs the person on the other side of the door 111 and a message that informs that the door 111 opens may be displayed on the monitor.

  A camera is an example of a sensor that detects a person. Whether or not there is a person on the opposite side of the door 111 may be determined using a human sensor (for example, an infrared sensor) other than the camera.

Embodiment 3 FIG.
A description will be given of a mode in which two operators do not collide when entering and leaving the room at the same time on both sides of the door.
Hereinafter, items different from the first and second embodiments will be mainly described. Matters whose description is omitted are the same as in the first and second embodiments.

The configuration of the door control system 100 is the same as that of the first embodiment (see FIG. 1).
Hereinafter, it is assumed that one of the outdoor side and the indoor side is defined as the “priority side” and the other is defined as the “non-priority side”.
When the card information is read by the priority-side card reader, the authentication unit 210 uses the card information read by the priority-side card reader as the priority-side card information to unlock the electric lock 112 based on the priority-side card information. It is determined whether or not. Further, when the card information is read by the non-priority side card reader, the authentication unit 210 sets the card information read by the non-priority side card reader as non-priority side card information based on the non-priority side card information. It is determined whether or not the lock 112 is unlocked.
When the authentication unit 210 determines that the electric lock 112 is to be unlocked based on the priority side card information, the camera control unit 220 determines whether there is a person on the non-priority side.
When it is determined by the authentication unit 210 that the electric lock 112 is unlocked based on the priority card information, the electric lock control unit 250 determines that the camera control unit 220 determines that there is no person on the non-priority side and a predetermined amount. The electric lock 112 is unlocked when the time elapses or when the authentication unit 210 determines to unlock the electric lock 112 based on the non-priority card information.

FIG. 6 is a diagram showing an outline of the door control system 100 according to the third embodiment.
An outline of the door control system 100 according to Embodiment 3 will be described below with reference to FIG.

The person A who wants to enter the room causes the outdoor card reader 121 to read the card information of the ID card. Also, the person B who wants to leave the room causes the indoor card reader 122 to read the card information of the ID card.
The authentication unit 210 of the controller 200 authenticates the person A based on the card information read by the outdoor card reader 121 and authenticates the person B based on the card information read by the indoor card reader 122.
When both person A and person B are authenticated, the monitor control unit 230 displays the camera image captured by the indoor camera 142 on the outdoor monitor 131 and displays the camera image captured by the outdoor camera 141 indoors. It is displayed on the monitor 132.
Furthermore, the card reader control unit 240 sounds a sound from the outdoor card reader 121 and the indoor card reader 122 to alert the person A and the person B.
Thereafter, the electric lock control unit 250 unlocks the electric lock 112.
The person A and the person B confirm that the person is behind the door 111 by the display on the monitor and the sound of the card reader, and enter the door with the door 111 opened with care.

FIG. 7 is a flowchart showing a door control method (priority side) of controller 200 in the third embodiment.
FIG. 8 is a flowchart showing a door control method (non-priority side) of controller 200 in the third embodiment.
The door control method of the controller 200 in Embodiment 3 is demonstrated below based on FIG. 7 and FIG.

First, a door control method when card information is read by a card reader on the priority side will be described based on FIG.
The flowchart shown in FIG. 7 is obtained by adding S124 to the second embodiment (FIG. 5). Hereinafter, S124 will be described, and description of other processes will be omitted.
In FIG. 7, “operating side” described in FIG. 5 of the second embodiment is replaced with “priority side”, and “non-operating side” illustrated in FIG. 5 of the second embodiment is replaced with “non-priority side”.

<S124>
If it is determined in S123 that there is a person around the door on the non-priority side (YES), the authentication unit 210 reads the card information by the card reader on the non-priority side and collates the card information (hereinafter, “ It is determined whether or not the “non-priority side collation result” is “collation OK”. Hereinafter, the fact that the collation result on the non-priority side is “collation OK” is referred to as “authenticated on the non-priority side”.
If authenticated on the non-priority side (YES), the process proceeds to S130b.
If it is not authenticated on the non-priority side (NO), the process proceeds to S114.

Next, a door control method when card information is read by a non-priority card reader will be described with reference to FIG.
The flowchart shown in FIG. 8 is obtained by adding S125 and S130d to the second embodiment (FIG. 5). Hereinafter, S125 and S130d will be described, and descriptions of other processes will be omitted.
In FIG. 8, “operating side” described in FIG. 5 of the second embodiment is replaced with “non-priority side”, and “non-operating side” described in FIG. 5 of the second embodiment is replaced with “priority side”.

<S125>
If it is determined in S123 that there is a person around the priority side door (YES), the authentication unit 210 determines whether the priority side is authenticated.
If authenticated on the priority side (YES), the process proceeds to S130d.
If it is not authenticated on the priority side (NO), the process proceeds to S114.

<S130d>
The card reader control unit 240 sounds the authentication sound B from the card reader on the non-priority side as in S130c.
After S130d, the door control method (non-priority side) process ends.
The electric lock 112 is unlocked by the door control method (priority side) process (S131).

In the third embodiment, the door control system 100 that delays the unlocking timing of the electric lock 112 after authentication when there is a person on the opposite side of the door 111 when entering (leaving) the room is described.
Thereby, the timing at which the doors 111 of the two persons on both sides of the door 111 are opened can be shifted to avoid a collision when entering (withdrawing) the room.

  For example, if the door 111 is opened inward and the outside operator holds the door knob and the door 111 is opened from the inside, the outside operator is pulled by the door 111, which is dangerous. To avoid these dangers, it is difficult for the inside operator to be careful. The camera and monitor should be on both sides of the door 111 in order to make the outside operator aware of the presence of the person on the other side of the door.

  100 door control system, 111 door, 112 electric lock, 121 outdoor card reader, 122 indoor card reader, 131 outdoor monitor, 132 indoor monitor, 141 outdoor camera, 142 indoor camera, 200 controller, 210 authentication unit , 220 camera control unit, 230 monitor control unit, 240 card reader control unit, 250 electric lock control unit, 290 card information storage unit.

Claims (5)

Whether the electric lock is unlocked based on input information input to an input device installed on the operation side with either the entrance side of the door locked with the electric lock or the exit side of the door as the operation side An unlock determination unit that determines whether or not using a CPU (Central Processing Unit);
When it is determined by the unlocking determination unit that the electric lock is to be unlocked, the side where the input device is not installed is set on the non-operation side as the non-operation side between the entrance side of the door and the exit side of the door A display unit for displaying a non-operation side image captured by a camera to be displayed on a display device installed on the operation side ;
If it is determined that unlocks the electric lock by the front Machinery tablets determination unit, and determines who detection unit using one CPU the non-operated side are people,
After the non-operating side image is displayed by the display unit, when the human detection unit determines that there is no person on the non-operating side or when a predetermined time has passed, whichever is earlier An unlocking part to unlock the lock
Door control apparatus characterized by comprising a. The door control device further includes:
When the predetermined time has elapsed, using said output device to be installed in non-operation side, the door according to claim 1, characterized by comprising the non-operating-side alert attention part to people who are Control device. When the predetermined time has elapsed, the caution unit uses an output device installed on the non-operation side to alert a person on the non-operation side and also installs the output device on the operation side. The door control device according to claim 2 , wherein a warning is given to a person on the operation side by using. When the unlocking determination unit inputs information to a priority side input device installed on the priority side with either the entrance side of the door or the exit side of the door as a priority side, the priority side input device It is determined whether the electric lock is unlocked based on the priority side input information using the information input to the priority side input information, and the priority side of the door entrance side and the door exit side is determined. When information is input to a non-priority side input device installed on the non-priority side as a non-priority side where the input device is not installed, the information input to the non-priority side input device is used as non-priority side input information Determine whether to unlock the electric lock based on the non-priority side input information,
The person detection unit determines whether or not there is a person on the non-priority side when the unlock determination unit determines to unlock the electric lock based on the priority side input information,
When the unlocking unit is determined by the unlocking determination unit to unlock the electric lock based on the priority side input information, the person detection unit determines that there is no person on the non-priority side And unlocking the electric lock when the predetermined time elapses or when it is determined by the unlock determination unit to unlock the electric lock based on the non-priority side input information The door control device according to any one of claims 1 to 3, wherein: Whether the electric lock is unlocked based on input information input to an input device installed on the operation side with either the entrance side of the door locked with the electric lock or the exit side of the door as the operation side An unlock determination unit that determines whether or not using a CPU (Central Processing Unit);
When it is determined by the unlock determination unit that the electric lock is to be unlocked, the side on which the input device is not installed is set as the non-operating side between the entrance side of the door and the exit side of the door. A human detection unit for determining whether there is a CPU,
An unlocking unit for unlocking the electric lock when the human detection unit determines that there is no person on the non-operating side or when a predetermined time has elapsed, whichever is earlier A door control device.

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