JPH07119538B2 - Door opening / closing control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a door opening / closing control device that detects that a human body or the like approaches or leaves a door to automatically open and close the door.

[Conventional technology]

This type of door opening / closing control device forms a detection area for detecting the presence or absence of a human body, etc. in front of and behind the door, judges the entry / exit of the human body etc. into / from this detection area, and controls the opening / closing of the door. A detection device for sending a signal for

This type of detecting device has, for example, a light emitting and receiving device as disclosed in Japanese Patent Laid-Open No. 1-99884. The light projecting / receiving device 10 (FIG. 13) disclosed herein is a light projecting element 1 arranged on the back of a light projecting lens 9 in two rows in the door opening / closing direction.
8 to 8 and a light receiving portion 9B formed of two light receiving elements 1A to 8A arranged in two rows in the door opening / closing direction on the back of the light receiving lens 9A. By irradiating the floor with the optical axis toward the floor in front of the door and irradiating the floor with infrared rays,
An irradiation area C composed of divided irradiation areas C1 to C8 as shown in the figure is formed, and the light-receiving elements 1A to 8A direct their optical axes toward the centers of the corresponding divided irradiation areas C1 to C8, respectively. In the irradiation space by 8, as shown in FIGS.
The detection areas S1 to S8 indicated by diagonal lines are formed, and the detection area S is formed as a whole. Each of the light projecting elements 1 to 8 is controlled by the light projecting section element changeover switch SW-A as shown in FIG. The output (analog output) of the light receiving element corresponding to is sequentially taken out by the light receiving element changeover switch SW-B, noise-removed by the filter, and then converted into a digital value, and the digital average value thereof is controlled by the control section (from the microcomputer). When the digital average value of the output is at the human body level, the door open signal is sent to the door opening / closing drive device (door engine controller) through the timer (setting time To) to open the door. Let

FIG. 9 is a schematic diagram for explaining a conventional example of a door opening / closing control device using this detection device. In the figure, 20 is an automatic door which is controlled to be opened and closed by a door opening / closing drive DRIVE. 30A, 30B is the above-mentioned detection device, which has a block configuration as shown in FIG. 10 and is provided on both sides of the automatic door 20 of, for example, the ceiling of the building entrance and exit, and the above-mentioned detection device 30A has. The light emitting and receiving device forms a detection area A in the front part of the automatic door 20, and the above-described light emitting and receiving device of the detection device 30B forms a detection area B in the rear part of the automatic door 20.

FIG. 10 is a functional block diagram showing a conventional operation of an example of a conventional door opening / closing control device, 31A is a detection area A of the detection device 30A.
An entry determination circuit, 32A is a door open signal output circuit, 31B is a detection area B entry determination circuit, 32B is a door open signal output circuit, and 33B is a gate element with a latch function. The gate element 33B is in an output prohibited state when the door open signal SA sent from the door open signal output circuit 32A is supplied, and after the signal disappears, a predetermined time Ty elapses or the human body a detects the detection area B. The output prohibition state is maintained until the door open signal SB sent from the door open signal output circuit 32B disappears.

In this configuration, as shown in FIG. 14, the human body a now enters from the detection area A and the automatic door is opened as indicated by the solid arrow.
20 → Pass as detection area B.

When the human body a enters the detection area A, the detection area A entry determination circuit 31A of the detection device 30A detects the human body a, generates a human body detection signal X, and outputs a door open signal output circuit to which the human body detection signal X is input. 32A sends a door open signal SA to a door opening / closing drive DRIVE (not shown). As a result, the automatic door 20 starts to open. When the human body a enters the detection area B through the open automatic door 20, the detection area B of the detection device 30B is detected.
The entry determination circuit 31B detects the human body a, and the door open signal output circuit 32B sends the door open signal SB, but the gate element 33B is in a prohibited state by the door open signal SA of the detection device 30A. The open signal SB is not supplied to the door opening / closing drive DRIVE, and the automatic door 20 starts the closing operation when the human body a passes the detection area A and the door open signal SA disappears.

[Problems to be Solved by the Invention]

Thus, since the gate element 33B is in the output prohibited state after the door open signal SA disappears or until the human body a exits from the detection area B, as shown in FIG.
When another human body b heading for the automatic door 20 enters the detection area B when passing through the automatic door 20, even though the human body b exits the detection area B and tries to pass through the automatic door 20, There is a danger that the human body b will be caught in the automatic door 20 as it begins to close.

That is, in this conventional configuration, when a human body enters the detection area A and then another human body that faces the automatic door 20 enters the detection area B, the detection device 30B causes the other human body to pass through the automatic door 20. Since it is not possible to determine the direction of the human body that is facing the automatic door 20,
There is a problem in that it cannot be guaranteed that the other human body passes the automatic door 20 safely.

In order to solve this problem, the present applicant has previously proposed a door opening / closing control device in which the detection area B is divided into a near door detection area B1 and a far door detection area B as shown in FIG. did.

In this configuration, the near door detection area B1 is masked and detected until a predetermined time elapses after the door open signal output by the detection device 30B disappears on condition that a person has entered the detection area A formed by the detection device 30A. The device 30B is set to the output prohibited state, and the above person passes through the detection area A and the near door detection area B1
The detection device until the person leaves the far door detection area B2 by masking the far door detection area B2 on condition that the person has moved to
Keep the 30B output disabled state.

Therefore, the person a heads toward the door from the detection area A side formed by the one detection device 30A, passes through the door, and closes the door detection area.
When exiting from B1 to the non-detection area via the distance detection area B2, that is, when a person a passes through the door from the one detection area A, the person a does not detect via the distance detection area B2. Until exiting to the area, the other detection device 30B is restricted to the output prohibited state and does not output the door open signal. Therefore, when a predetermined time elapses after the door open signal sent by the detection device 30A disappears, the door promptly enters the closing operation.

When a person passes through the door from the far door detection area B2 through the near door detection area B1, none of the detection areas is masked.

The first person a heads to the door from the detection area A formed by the detection device 30A, and at this time, the second person b is the far door detection area.
When the second person b enters the far door detection area B2 when entering B2 and heading for the door, the first person a detects the detection device 30.
Since the output prohibition state of the detection device 30B associated with entering the detection area A formed by A is released, and the detection device 30B outputs a door open signal until the second person b has finished passing through the door, The first person a as well as the second person b can safely pass through the door.

However, in this configuration, when the first person a enters the near door detection area B1, the far door detection area B2 is masked, so at this time, as shown in FIG. When entering the near door detection area B2 directly from the detection area and heading for the door, the detection device 30B is in the output prohibited state,
There is a problem that the door is starting to be closed, and the second person c may not be able to safely pass through the door.

The present invention has been made in order to solve the above problems, and when the human body moves toward the automatic door from both sides of the automatic door or at the same time, both of them can safely pass through the automatic door. In addition, it is an object of the present invention to provide a safe and reliable door opening / closing control device.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a door opening / closing drive device for opening and closing the door when a human body is detected by forming a first detection area for detecting a human body on one side of the door. When a human body is detected by forming a second detection area for detecting a human body on the other side of the door, a first detection device that sends an open signal, and outputs a second door open signal to the door opening / closing drive device. In the door opening / closing control device including the second detection device for sending out,
The detection area formed by at least one detection device is divided into two stages, a near door detection area near the door and a far door detection area, and the far door detection area is at least three small detection areas in the door opening / closing direction. A person has entered the detection area formed by the other detection device. As a condition, the near door detection area is masked until the door open signal output by the other detection device disappears for a predetermined time after the disappearance, and the one detection device is set to the output prohibited state, and the person detects the other detection area. The far door detection area is masked on condition that it has moved to the near door detection area via, and the output prohibition state of the one detection device is continued until a person leaves the far door detection area, When a person enters two small detection areas that are not adjacent to each other, the one output state of the one detection device is released.

In claim 2, the small detection area is not large enough for two people to pass each other in opposite directions.

[Action]

In the present invention, when a person goes to the door from the detection area side formed by the other detection device, passes through the door, and exits from the near door detection area to the non-detection area via the far detection area,
When a person enters the one detection area, the one detection device is restricted to the output prohibited state and does not output the door open signal until the person exits the non-detection area via the far detection area. Therefore, when a predetermined time elapses after the door open signal sent by the other detection device disappears, the door promptly enters the closing operation.

When a person passes through the door from the far door detection area through the near door detection area, none of the detection areas is masked.

When the first person moves toward the door from the detection area formed by the other detection device, and when the second person enters the far door detection area toward the door, the second person moves the far door. When entering the detection area, the output prohibition state of the one detection device due to the first person entering the detection area formed by the other detection device is released, and the one detection device is activated by the second detection device. Since the door open signal is output until the second person finishes passing through the door, not only the first person but also the second person can safely pass through the door.

When the first person passes through the door and goes from the near door detection area to the far door detection area, and when the second person enters the far detection area from the non-detection area, When two persons enter the small detection areas that are not adjacent to each other, the output prohibition state of the one detection device is released and the detection device sends a door open signal, so that the second person opens the door. You can pass safely.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the detection device 30B shown in FIG.
A detection area (near door detection area) B1 and a detection area (far door detection area) B2 are formed behind the automatic door 20 in two steps, and the detection area B1 is a small detection area B1b in the center and small left and right sides. It consists of inspection areas B1a and B1c. These small detection areas are not large enough for two people.

In this embodiment, the detection area formed by the light projecting element 5 and the light receiving element 5A of the light projecting and receiving device 10 shown in FIG. 13 is the small detection area B1a, and the detection area formed by the light projecting element 6 and the light receiving element 6A is the small detection area B1.
b, the detection area formed by the light emitting element 7 and the light receiving element 7A is defined as a small detection area B1c, and each of the light receiving elements 5A to 7A (light receiving portions B1a to B1
Digitized values MB1a, MB1 obtained by A / D conversion of the output (shown by c)
b, MB1c main controller (comprising a microcomputer)
The CPU compares the judgment values KB1a, KB1b, and KB1c, respectively,
If the corresponding judgment value is reached, under certain conditions,
A human body detection signal X is transmitted, and a set of light projecting elements 1 to 3 (shown by a light projecting section B2 in the figure) and a set of light receiving elements 1A to 3A (in the figure,
The detection area created by the light receiving unit B2) is defined as the detection area B2, and the average value MB2 (hereinafter referred to as the average output value) of the digital values obtained by A / D converting the outputs of the light receiving elements 1A to 3A is used as the main control unit CPU.
In comparison with the judgment value KB2, when the judgment value KB2 is reached, the human body detection signal X is sent out under a certain condition so that the detection area B1 (the small detection areas B1a to B1c is divided). And B2. The CPU has a program represented by the operation flow shown in FIGS. 3 (a) and 3 (b). The light projecting elements 4 and 8 and the light receiving elements 4A and 8A of the light projecting / receiving device 10 are not used.

Each of the light projecting elements 1 to 3 of the light projecting section B2 is cyclically controlled at high speed in a predetermined order, and the outputs of the corresponding light receiving elements 1A to 3A of the light receiving section B2 are sampled in synchronization with this lighting control. Amplification section AMP, noise removal filter section BPF
After being passed through (Band pass filter), it is digitally converted and taken into the CPU. Similarly, each of the light projecting elements 5 to 7 of the light projecting unit B1a to the light projecting unit B1c is ON / OFF lighting controlled by a constraint, and the outputs of the corresponding light receiving units B1a to B1c are sampled in synchronization with this lighting control. After passing through the amplification unit AMP and the bandpass filter unit BPF, it is digitally converted and taken into the CPU. SWICH is a light receiving element 1A to 3A, 5A to 7A
Light output selection section, OUT
Is a door open signal output unit that receives a human body detection signal X from the CPU and sends a door open signal SB. The door open signal SB is turned off after a lapse of a predetermined time To after the human body detection signal X disappears. POWER is the power supply of the detection device 30B. The detection device 30A is the conventional detection device described above, and the door open signal SA output from the detection device 30A is supplied to the CPU of the detection device 30A.

In addition, in order to understand the operation of the above-described embodiment at a glance, FIG. 4 shows the present embodiment expressed as functional blocks.

The gate element 33B1 in FIG. 4 is in the output prohibited state while receiving the door open signal SA. Also, the gate element
33B2 is in an output prohibited state while receiving the door open signal SB from the detection area B2 entry determination circuit 32B2. 33B3 is an AND element, and when a person is simultaneously entering the small detection areas B1a and B1c, the door open signal SB is sent to the door opening / closing drive device DRIVE.
To pass.

Next, the operation of the embodiment shown in FIG. 1 will be described with reference to FIGS.
This will be described with reference to the operation flow shown in.

When the power switch (not shown) is turned on, the CPU is initialized, and the mode setting section (not shown) of the CPU displays MODE =
0 is set. This MODE = 0 is a mode in which a person does not enter any of the detection areas A and B1 and B2 (small detection areas B2a to B2c).

I] Now, as shown by the broken line in FIG. 5, the person a is in the detection area A.
It shall be directed to the automatic door 20 from the side.

(A) When a person a enters the detection area A, the detection device 30A
Sends the door open signal SA to the door open / close drive DRIVE and the detector 30B
To the CPU. This door open signal SA activates the door opening / closing drive DRIVE to start opening the automatic door 20. The CPU, which receives the door open signal SA, sets the mode to MODE = since no person has entered the detection areas B1 and B2.
Switch to 3 (step indicated by reference numeral).

This MODE = 3 is based on the condition that a person has entered the detection area A, until the door open signal SA disappears for a predetermined time, the door open signal SB (the door open signal accompanying the person entering the detection area B1 ) Is prohibited, in other words, the detection area B1 is entirely masked.

(B) When a person a passes through the automatic door 20 and enters, for example, the small detection area B1a in the detection area B1, the output value MB of the light receiving element 5A
Since 1a reaches the judgment value KB1a, the CPU sets a flag (small detection area B1a flag) (step indicated by reference numeral (A)), but since MODE = 3, the human body detection signal X is not transmitted, and accordingly, The door open signal output unit OUT does not output the door open signal SB even though the person a is entering the detection area B1, and the CPU switches to MODE = 4 (steps indicated by symbols 1).

This MODE = 4 is for detection area B1 (small detection air B1a ~ B1
A mode in which the generation of the door open signal SB (door open signal due to the person entering the detection area B2) is prohibited until the person exits the detection area B1 on condition that the person a has entered c). In this mode, the entire detection area B2 is masked.

(C) When the person a advances from the small detection area B1a of the detection area B1 to the detection area B2, the output value MB1a deviates from the determination value KB1a, but the output average value MB2 of the light receiving elements 1A to 3A reaches the determination value KB2. , CPU sets a flag (detection area B2 flag) (step indicated by symbol (D)). However, MODE = 4
(Step (E)), the door open signal output unit OUT does not output the door open signal SB even though the person a has advanced to the detection area B2, and the CPU switches the mode to MODE = 5 ( From step)).

This MODE = 5 is a mode in which a person has moved from the detection area B1 (small detection area B1a or B1b or B1c) to the detection area B2, and a mode in which the operation of prohibiting the generation of the open signal SB is continued, that is, the detection In this mode, masking of the entire area B2 is continued.

(D) When the person a exits from the detection area B2 to the non-detection area, the output average value MB2 deviates from the determination value KB2. Therefore, the detection area B2 flag is set back to the initial state, and the mode is MO.
Switch to DE = 0 (step ~).

In this way, the person a enters the detection area A, and the automatic door 20
When passing through the detection area B1 (any of the small detection areas B1a to B1c) and then passing through the detection area B2 and exiting from the detection area B2, even if a person a enters the detection areas B1 and B2, , The door open signal SB is not generated, and the door open signal SA causes
The automatic door 20 is controlled to open and close, and when the person a passes through the automatic door 20, the automatic door 20 immediately starts the closing operation and closes.

II] Next, the case where the person b is heading toward the automatic door 20 from the detection area B2 side as shown by the solid line in FIG.

(E) When the person b enters the detection area B2 from the non-detection area, the output average value MB2 of the light receiving elements 1A to 3A reaches the determination value KB2, so the CPU sets a flag (detection area B2 flag) (code (D ) Step). At this time, since MODE = 0 (step (F)), the CPU outputs the human body detection signal X (step indicated by symbol (H)), and the door open signal output unit OUT receiving this output outputs the door open signal. Output SB to the door open / close drive DRIVE. At the same time, the CPU switches to MODE = 1 (step).

This MODE = 1 is a mode in which the door open signal SB is generated on condition that a person has entered the detection area B2 from the non-detection area regardless of the presence or absence of the person in the detection area B1 and the detection area A. .

(F) When the person b passes the detection area B2 and enters, for example, the small detection area B1c of the detection area B1, the output average value MB2 of the light receiving elements 1A to 3A deviates from the determination value KB2, but the light receiving element 7A.
Output value MB1c reaches the judgment value KB1c, the CPU sets the detection area B1 flag (step indicated by reference numeral (A) '), and since MODE = 1 (step (B)'), the human body detection signal X Is continuously output, the door open signal SB is continuously transmitted, and the automatic door 20 remains open. The mode is switched to MODE = 2 (steps indicated by reference symbols ~).

This MODE = 2 is a mode in which a person moves from the detection area B2 to the detection area B1, and is a mode in which the generated door open signal SB is continuously generated.

(G) When the person b exits the small detection area B1c of the detection area B1 and the output value MB1c deviates from the determination value KB1c, and then a predetermined time To passes, the CPU lowers the detection area B1 flag (step (C)). ′). As a result, the automatic door 20 is closed after a lapse of a predetermined time when the door open signal SB disappears (step (J)). At this time, if there is no person in the detection area A and the door open signal SA is not generated, the CPU switches to MODE = 0 after a lapse of a predetermined time, and there is a person in the detection area A, and the door is opened. When signal SA is generated, MODE
= 3 (step-).

III] Next, when a person approaches the automatic door 20 from both sides of the automatic door 20, that is, in a state where the person a is entering the detection area A or before the person a enters the detection area B1, A case where the person b enters the detection area B1 from the opposite direction will be described.

(H) The state in which the person a exists in the detection area A is MODE = 3 (step), the automatic door 20 is in the opening operation by the door open signal SA, and the door open signal SB (the person is in the detection area). Output of the door open signal) due to entering B1 is prohibited. When the person b enters the detection area B2, the detection detection area B2 flag is set as described above, and the detection device
30B outputs a door open signal SB (step (H)). The mode changes from MODE = 3 to MODE = 1 (step), and the output prohibition state (mask state of the detection area B1) of the door open signal SB (door open signal due to a person entering the detection area B1) is released.

(I) When person b moves from detection area B2 to B1, detection area
Since the B1 flag is set (after that, the detection area B2 flag is reset) and MODE = 1, the door open signal SB is output until a predetermined time passes after the person b passes the detection area B1. to continue. That is, even if the person a passes through the automatic door 20, the automatic door 20 is not closed, and the door open signal SB is continuously transmitted until the person b passes through the automatic door 20.

IV] When the person a advances from the detection area A to the small detection area B1a of the detection area B1, as shown in FIG. 6, the person c enters the detection area B1 from the side and heads toward the automatic door 20.

(J) Since the small detection areas B1a to B1c are not large enough for two people to enter at the same time, the person c is now in the small detection area B1b.
Or, it will enter the small detection area B1c.
When the person a is in the detection area A, MODE = 3. When the person a advances to the small detection area B1a, the detection area B1 flag is set in step (A), but the door open signal SB is It is not output and MODE = 4 (step (B)). At this time, assuming that the person c has entered the small detection areas B1c, since MODE = 4 (step), the door open signal SB is not output, but the step proceeds from to and the small detection areas B1a and B1c which are not adjacent to each other. Since there are people together in and, after going through the steps, MODE = 2 at the step
, The output prohibition state of the detection device 30B is released, the door open signal SB is sent to the door opening / closing drive device DRIVE (step (I), and the automatic door 20 is opened).

That is, the person a who has advanced from the detection area A has the automatic door 20
When the vehicle enters the detection area B1 after passing through the door, the door open signal S
Although the output of B is prohibited, in this state, when the person c enters the small detection area that is not adjacent to the small detection area where the person a exists, it is determined that both are persons who pass by the body surface, and the automatic door 20 Keep opening.

In addition, the small detection area where the person a and the person c are adjacent to each other, for example,
When only B1a and B1b are entered, the release operation of the output prohibition state of the detection device 30B described in the item (j) above is not performed. This is because the person a or the person c does not pass over the three small detection areas B1a to B1c, but
As shown in the figure, small detection areas B1a and B1b, small detection area B1
One person may pass across b and B1c,
This is to prevent such a mode from being erroneously determined as face-to-face traffic. When one person passes over the adjacent small detection area, the mode is switched to MODE = 4 in step 17, and the door open signal SB output prohibited state is continued.

As described above, in the present embodiment, when a person enters the detection area A from the non-detection area, the detection area B1 is masked, and when the person enters the detection area B1, the detection area B2 is detected.
Since the above person is masked, when the above-mentioned person passes through the automatic door 20, the automatic door 20 can be promptly closed, and when the person is moving from the detection area A side to the detection area B1 side, another person does not detect. When entering the detection area B2 from the area,
Even if the mask operation is released and a person from the detection area A passes through the automatic door 20 and the door open signal SA disappears, the door open signal SB is sent to the door opening / closing drive device DRIVE. The other person can safely pass through the automatic door 20 without closing.

Also, when another person enters the detection area B1 through the automatic door 20 and enters the detection area B1 directly from the non-detection area without passing through the detection area B2, both are detected. Small detection areas B1a and B1c apart from area B1
If both of them enter the detection area B1, it is determined that they are persons who pass the detection area B1 through the body, and the output stop of the door open signal SB is released, so that the detection area B1 is directly entered into the detection area B1. To the automatic door 20
Until the automatic door 20 is passed, the automatic door 20 is opened and the other person can safely pass through the automatic door 20.

In the above embodiment, the detection area of the detection device 30B is divided into two stages, but not only on the detection device 30B side,
The detection area of the detection device 30A is also divided into two stages, and the detection device 3
The configuration may be such that 0A executes the operation according to the above-described operation flow.

In the above embodiment, the detection area of the detection device 30B is set to 2
Although it is divided into stages, the number of divided stages may be increased as necessary.

Further, the number of divisions of the small detection areas is not limited to three of the embodiment, and may be divided into four or more small detection areas.

Further, in the above embodiment, the light receiving elements 5A to 7A of the light emitting and receiving device 10 are provided.
However, the method of classifying the small detection area is not limited to this.

Further, in the above embodiment, the detection devices 30A and 30B including the CPU are provided.
Although the human body detection is performed by using the software, it goes without saying that a detection device that detects the human body by hardware may be used.

〔The invention's effect〕

As described above, according to the present invention, at least one of the detection areas formed on both sides of the door is divided into two stages, that is, a near door detection area and a far door detection area, and the near door detection area is divided into a plurality of small detection areas. If a person enters the other detection area, the near door detection area is masked, and if a person who enters this detection area enters the near door detection area, the far door detection area is When a person enters the far door detection area from a non-detection area by masking, the mask operation is unconditionally released, and a person enters a small detection area that is not adjacent to the near door detection area. When entering at the same time or before or after, it is determined that the person who has passed the door and the person who is going to the door have entered the near door detection area and the mask of the near door detection area is released. , Even if a person is approaching the door from both sides of the door, or if a person is approaching from both sides of the far door detection area, the door will close even if one person is trying to pass through the door. Since both persons can safely pass through the door without entering the operation, safety and reliability can be improved as compared with the conventional case.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a schematic diagram for explaining a detection area in the above embodiment,
FIGS. 3 (a) and 3 (b) are operation flow charts of the program of the CPU in the above embodiment, FIG. 4 is a diagram showing functional blocks of the above embodiment, and FIGS. 5 and 6 are of the embodiment. FIG. 6 is a diagram showing a relationship between a person and a detection area for explaining the operation,
The figure shows the detection area of the door opening / closing control device in which the detection area is divided into two, and FIGS. 7 and 8 show the relationship between the detection area and the person of the conventional door opening / closing control device, FIG. Is a diagram showing a relationship between a detection area and a person for explaining conventional problems, FIG. 10 is a diagram showing a conventional door opening / closing control device in functional blocks, and FIGS. 11 and 12 are conventional detections. A block diagram for explaining the area forming method and a diagram of the formed detection area. FIG. 13 is a diagram showing an example of the light emitting and receiving device used in the conventional door opening and closing control device, FIG. 14 and FIG. 15
The figure is a diagram showing the relationship between a person and a detection area for explaining the operation of the conventional door opening / closing control device. 10 …… Emitter / receiver, 20 …… Automatic door, 30A, 30B …… Detector, CPU …… Main controller, A, B1 …… Detection area, B1a to B1c …… Small detection area. B2 …… Detection area,

Claims (2)

[Claims] 1. When a human body is detected by forming a first detection area for detecting a human body on one side of the door, a first door open signal is sent to a door opening / closing drive device for opening and closing the door. First
Detecting device for detecting a human body by forming a second detection area for detecting a human body on the other side of the door, and sends a second door open signal to the door opening / closing drive device. In a door opening / closing control device having at least one detection device, a detection area formed by at least one detection device is divided into two stages, a near door detection area near the door and a far door detection area, and the near door detection area is opened / closed in the door opening / closing direction. Is divided into at least three small detection areas, and if a person has entered the detection area formed by the other detection device, a door opening signal output from the other detection device is output until the predetermined time elapses after the disappearance. The door detection area is masked to put one of the detection devices in an output prohibited state, and the far door detection area is masked on condition that the person has moved to the near door detection area via the other detection area. Until the person exits the far door detection area, the output prohibition state of the one detection device is continued, and when a person enters two small detection areas that are not adjacent to each other among the plurality of small detection areas, A door opening / closing control device, which releases the output inhibition state of the one detection device. 2. The door opening / closing control device according to claim 1, wherein the small detection area is not wide enough for two people to pass in opposite directions.