JPH07119539B2 - 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. As shown in FIG. 11, each of the light projecting elements 1 to 8 is controlled by the light projecting section element changeover switch SW-A at high speed sequentially and cyclically to switch the light projecting to correspond to the projecting element. The output (analog output) of the light receiving element is sequentially taken out by the light receiving element changeover switch SW-B, noise is removed by the filter, and then converted to a digital value, and the digital average value is composed of a control unit (a micro computer). ) And the digital average value of the output is at the human body level, a door open signal is sent to the door opening / closing drive device (door engine controller) to open the door. 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 and 30B are the above-mentioned detection devices,
It has a block structure as shown in FIG. 10, and is arranged on both sides of, for example, a ceiling automatic door 20 of a building entrance / exit, and the above-mentioned light emitting / receiving device of the detection device 30A is detected at the front part of the automatic door 20. The area A is formed, and the above-mentioned light emitting / receiving device of the detection device 30B forms a detection area B at 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 the human body a exits the detection area B until a predetermined time elapses after the signal disappears. Then, the output prohibited 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 through 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 tor open signal SA of the detection device 30A. The opening signal SB is not supplied to the door opening / closing driving device DRIVE, and the automatic door 20 starts the closing operation when a predetermined time elapses after the human body a passes the detection area A and the door opening 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.
If another human body b heading for the automatic door 20 enters the detection area B when passing through the automatic door 20, the automatic door 20 will exit even though the human body b is about to exit the detection area B and pass through the automatic door 20. Starts to close and the human body b may get caught in the automatic door 20.

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 applicant previously proposed a door opening / closing control device in which the detection area B is divided into two, 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 until a predetermined time elapses after the door open signal output by the detection device 30A disappears on condition that a person has entered the detection area A formed by the detection device 30A. With the detection device 30B in the output prohibited state, the far door detection area B2 is masked on the condition that the person has moved to the near door detection area B1, and the detection device 30B until the person leaves the far door detection area B2. Make the output prohibition state continue.

Therefore, the person a heads toward the door from the detection area A side formed by the other detection device 30A, passes through the door, and closes the door detection area.
When exiting from B1 to the non-detection area via the far door detection area B2, that is, when the person a passes the door from the other detection area A, the person a passes through the far door detection area B2. One of the detection devices 30
B is locked in 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 immediately starts 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.
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 holds the automatic door in the open position until the second person b has finished passing through the door. Therefore, not only the first person a but also 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 far door detection area B2 from the detection area and heading for the door, the detection device 30B is in the output prohibited state, and therefore the door is starting to close, and the second person b may not be able to safely pass through the door. In addition to the problem that occurs, when the first person a enters the near door detection area B1, the far door detection area B2 is masked. At this time, as shown in FIG. When directly entering the near door detection area B1 from the non-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 of the detection devices is divided into two stages, the near door detection area near the door and the far door detection area, and both detection areas are divided into at least three small detection areas in the door opening / closing direction. Then, on condition that a person has entered the detection area formed by the other detection device, the near door detection area is masked until a predetermined time elapses after the door open signal output by the other detection device disappears. One of the detection devices is set to the output prohibited state, and the far door detection area is masked by the person on condition that the person has moved to the near door detection area via the other detection area. The output prohibition state of one of the detection devices is continued until the user exits, and when one person enters two small detection areas that are not adjacent to each other among the plurality of small detection areas, the one of the detection devices is detected. It is obtained by a structure for releasing the output disabled state of the location.

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 faces 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 door detection area, the person is When entering 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 door detection area. Therefore, when the door open signal sent from the other detection device disappears and a predetermined time elapses, 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 automatic door is held in the open position until the first person finishes passing through the door, not only the first person but also the second person can safely pass through the door.

In addition, when the first person passes through the door and enters the near door detection area or the far door detection area, and at this time, the second person enters the far door detection area or the near door detection area from the door detection area, When the first person and the second person 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. Two people can safely pass through the door,
A state in which one person straddles the near door area and the far door detection area will not be erroneously determined as a person having entered both the near door detection area and the far door detection area.

〔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 and behind the automatic door 20 in two steps, and the detection area B1 is composed of four small detection areas B1a, B1b, B1c.
And B1d, and the detection area B2 is also divided into four small detection areas B2a, B2b, B2c and B2d. Each of these small detection areas B1a to B1d and B2a to B2d is large enough for one person to enter, but is not large enough for two persons to enter.

In this embodiment, a small detection area B2a is a detection area formed by the light emitting element 1 and the light receiving element 1A of the light emitting and receiving device 10 shown in FIG. 13, and a small detection area B2 is a detection area formed by the light emitting element 2 and the light receiving element 2A.
b, the detection area formed by the light projecting element 3 and the light receiving element 3A is a small detection area B2c, the detection area formed by the light projecting elements 4 and 4A is a small detection area B2d, and each of the light receiving elements 1A to 4A (light receiving unit B2a to B2
Digitized values MB2a, MB2 obtained by A / D conversion of the output of (d)
b, MB2c, MB2d are compared with the judgment values KB2a, KB2b, KB2c, KB2d in the main control unit (comprising a microcomputer) CPU, respectively, and if the corresponding judgment values are reached, the human body The detection signal X is transmitted. Further, the detection area formed by the light emitting element 5 and the light receiving element 5A of the light emitting and receiving device 10 is the small detection area B1a, the detection area formed by the light emitting element 6 and the light receiving element 6A is the small detection area B1b, and the light emitting element 7 and the light receiving element. The detection area created by 7A is the small detection area B1c, the detection area created by the light projecting elements 8 and 8A is the small detection area B1d, and the output of each light receiving element 5A to 8A (shown by the light receiving sections B1a to B1d in the figure) is A /
The digital-converted digital values B1a, MB1b, MB1c, and MB1d are judged by the main control unit (comprising a microcomputer) CPU as a judgment value KB.
1a, KB1b, KB1c, KB1d are compared with each other, and when the corresponding determination values are reached, the human body detection signal X is transmitted under certain conditions. The CPU has a program represented by the operation flow shown in FIGS. 3 (a) and 3 (b).

Each of the light emitting elements 5 to 8 of the light emitting unit B1a to the light emitting unit B1d is turned ON / O at high speed.
The FF lighting control is performed, and the outputs of the corresponding light receiving units B1a to B1d are sampled in synchronization with this lighting control, and the amplification unit
After passing through the AMP and bandpass filter BPF, it is digitally converted and taken into the CPU. Similarly, the light projecting section B2a-
Each of the light projecting elements 1 to 4 of the light projecting unit B2d is ON / OFF lighting controlled at high speed, and the outputs of the corresponding light receiving units B2a to B2d are sampled in synchronization with this lighting control, and the amplifier AMP and the band are output. After passing through the pass / filter section BPF, it is digitally converted and taken into the CPU. SWICH is a light receiving element 1A-4A, 5A-
OU selection unit, OU that samples and outputs 8A output
T 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.
Turns off after the human body detection signal X disappears. POWER is a power supply unit 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.

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 no person enters the detection area A, the detection areas B1 (small detection areas B1a to B1d) and B2 (small detection areas B2a to B2d).

I] Now, as shown in FIG. 4 (a), 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, and the door open signal SB (the door associated with the person entering the detection area B1 is detected until a predetermined time elapses after the door open signal SA disappears. This is a mode in which generation of an open signal) is prohibited, in other words, a mode in which the detection area B1 is masked.

(B) When the person a passes through the automatic door 20 and enters the detection area B1, for example, the small detection area B1c, the output value MB1c of the light receiving element 7A reaches the determination value KB1c, so the CPU sets a flag (detection area B1 flag). ) Is set (step indicated by reference numeral (A)), but since MODE = 3, the process proceeds to step (C),
Since a person does not enter any of the other small detection areas B1a, B1b, B1d, and B2 to B2d, the door open signal output unit OUT does not open regardless of the person a entering the detection area B1. Without outputting the signal SB (step (F)), the CPU sets the mode to MODE.
= 4 (steps indicated by reference symbols to).

This MODE = 4 is for detection area B1 (small detection areas 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 B1c of the detection area B1 to the small detection area B2c of the detection area B2, the output value MB1b1 deviates from the determination value KB1b, but the output value MB2c of the light receiving element 2A Since it reaches KB2c, the CPU lowers the detection area B1 flag (small detection area B1b flag) (step (E)), and the detection area B2 flag (small detection area B2b).
Flag) is set (step indicated by reference numeral (A) '). However, since MODE = 4 (step (B) '), the process proceeds to step (C)' and the other small detection areas B1a to B1d, B2 are detected.
Since a person has not entered any of a, B2b, and B2d, the process proceeds to step (F) ′ and the door open signal output unit OUT outputs the door open signal SB even though the person a has moved to the detection area B2. Does not output, 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 to the detection area B2 (small detection area B2a or B2b or B2c or B2d), which is a mode for continuing the operation of inhibiting the generation of the door open signal SB, that is, In this mode, the mask of the entire detection area B2 is continued.

(D) When the person a exits from the small detection area B2c of the detection area B2 to the non-detection area, the output value MB2c deviates from the determination value KB2c, so the small detection area B2b flag is lowered (step (E) ′), and the initial value is set. It returns to the state and the mode is switched to MODE = 0 (step ~).

In this way, the person a enters the detection area A, and the automatic door 20
When the person a enters the detection areas B1 and B2, the door open signal SB is not generated and the door is not released when the person a enters the detection areas B1 and B2. The automatic door 20 is controlled to be opened and closed by the open signal SA, and when the person a passes through the automatic door 20, the automatic door 20 immediately starts the closing operation and closes.

II] Next, as shown in FIG. 4B, the case where the person b is heading toward the automatic door 20 from the detection area B2 side will be described.

(E) When the person b enters the detection area B2, for example, the small detection area B2d from the non-detection area, the output value MB2b of the light receiving element 3A
Has reached the judgment value KB2b, the CPU sets a flag (small detection area B2b flag) (step indicated by reference numeral (A) '). At this time, since MODE = 0 (step (B) ′), the CPU outputs the human body detection signal X (step indicated by reference numeral (D ′)), and the door open signal output unit OUT receiving this output outputs the door open signal OUT. The open signal SB is output to the door opening / closing 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 through the small detection area B2b of the detection area B2 and enters the small detection area B1b of the detection area B1, the output value MB2b deviates from the determination value KB2b, but the output value MB1b of the light receiving element 6A is determined. Since the value KB1b is reached, the detection area B1 flag (small detection area B1c flag) is set (step indicated by reference numeral (A)), and since MODE = 1 (step (B)), the human body detection signal X is output. Continue, door open signal S
B continues to be delivered and 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) The person b exits the small detection area B1b of the detection area B1, the output MB1b deviates from the judgment value KB1b, and the CPU detects the detection area B1.
1 Clear the flag (step (E)). As a result, the door open signal SB disappears and the automatic door 20 starts to close after a lapse of a predetermined time. At this time, the CPU has no person in the detection area A,
When the door open signal SA is not generated, the mode is switched to MODE = 0. When a person is present in the detection area A and the door open signal SA is generated, the mode is switched to MODE = 3 (steps-).

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 B2 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 small detection area B2b of the detection area B2 as shown in FIG. 4 (c), the small detection detection area B2b flag is set as described above (step (A) ′), and MODE = 3. Therefore, the detection device 30B outputs the door open signal SB (step (D) '). Mode is M
MODE becomes 1 from ODE = 3 (steps ~), and the output prohibition state (mask state of the detection area B1) of the door opening signal SB (door opening 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
B1 flag is set (step (A)), detection area
The B2 flag is reset (step (E) '). MODE
Since = 1, when a predetermined time elapses after the person b has passed the detection area B1 and the door open signal SB disappears, the automatic door 2
0 starts closing. That is, even if the person a passes through the automatic door 20,
The automatic door 2 is not closed, and until the person b passes through the automatic door 20,
The automatic door 20 holds the open position.

IV] When the person a moves from the detection area A to the detection area B1 such as the small detection area B1d, as shown in FIG. 4 (d),
A case where the person b enters the detection area B2b will be described.

(J) When the person a enters the small detection area B1d of the detection area A or the detection area B1, in step (A), the detection area B1 is detected.
(Flag small detection area B1d flag) is set, MODE
= 3 (step (B)), the inter-door signal SB is not output, the automatic door 20 starts to close, and MODE = 4 is switched (step). At this time, when the person b enters the small detection area B2b, the detection area B2 flag (small detection area B2b flag) is set (step (A) ′), and since MODE = 4, the procedure goes to step (C) ′). Going forward, whether the small detection area where the person a and the person b have entered is the adjacent detection area,
It is determined whether the area is a non-adjacent detection area. In this case, since the small detection area B1d where the person a has entered and the small detection area B2b where the person b has entered are not adjacent to each other, the process proceeds to step (D) ', and the door open signal SB indicates the door opening / closing. It is sent to the drive unit DRIVE and the automatic door 20 opens.

(K) When the person b advances to the detection area B1, the door open signal SB continues to be output and MODE = 4 remains, and the person b automatically doors 20.
Pass through.

As described above, in this embodiment, when a person enters the detection area A, MODE = 3, the detection area B1 is masked (MODE = 3), and this person is a small detection area B1 of the detection area B1.
Although the door open signal SB is in the output prohibited state even when entering any of a to B1d, at this time, a person enters another small detection area that is not adjacent to the small detection area. Whether or not it is determined in step (C),
When there are people in the small detection areas that are not adjacent to each other, it is determined that one of these two people is the person who faces the automatic door 20 and the other is the person who has passed through the automatic door 20. , The mask is released, and the prohibition of the door open signal SB output is released.

Therefore, when the person a and the person b enter the adjacent small detection areas such as B1a and B1b, the small detection areas B2c and B2d, the small detection areas B1b and B2d, or the small detection areas B1d and B2d,
The release operation of the output prohibited state of the detection device 30B described in the above item (j) is not performed. This is because person a or person b is 3
Small detection areas such as B1a to B1c and small detection areas B2a to B
Although it does not pass over 2c, one person may pass over the small detection areas B1a and B1b, or the small detection areas B2d and B2c, and this mode is erroneously determined as face-to-face traffic. This is to prevent this.

Further, when a person enters the detection area B1, MODE = 4, the whole detection area B2 is masked, and even if this person enters any of the small detection areas B2a to B2d of the detection area B2,
The output prohibition state of the door open signal SB continues, but at this time also, it is a step to judge whether or not a person is entering another small detection area which is not adjacent to the small detection area. (C) ′, and when a person is present in the small detection areas that are not adjacent to each other, one of these two persons is the person who faces the automatic door 20 and the other person passes through the automatic door 20. It is determined that the person is a broken person and the door open signal SB is forcibly output.

FIGS. 5A to 5D show another example in which a person enters two small detection areas that are not adjacent to each other and the mask is released.

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.
Because the above person masks, when the above person passes through the automatic door 20, the automatic door 20 can be promptly closed, and when a person is heading 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.

In addition, when two small detection areas out of the eight small detection areas B1 and B2 are turned on, it is determined that the small traffic areas are face-to-face traffic only when the small detection areas are not adjacent to each other. Since the output stop of the door open signal SB is released,
It makes it possible to secure two-way traffic and prevent unnecessary opening and closing of automatic doors.

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 small detection area divisions of the detection areas B1 and B2 is four, but may be three or more.

In the above embodiment, the light receiving elements 1A to 8A of the light emitting and receiving device 10 are also included.
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, the near door detection area and the far door detection area, and the both detection areas are divided into three or more small areas. If a person enters the other detection area, the near door detection area is masked when a person enters the other detection area, and the far door detection is performed when a person who enters this detection area enters the near door detection area. When the area is masked and a person enters the far door detection area from the non-detection area, the mask operation is unconditionally released, and a person is placed in a small detection area that is not adjacent to the small detection areas. If the two enter at the same time or before or after, the person who has passed through the door and the person who is going to the door are judged to have entered one of the detection areas, and the door open signal is forcibly output. By this Even if a person is moving toward the door from both sides of the door, or if a person is moving from both sides of the one detection area, the one person is trying to pass through the door Does not enter the closing motion, both people can safely pass through the door, compared to the conventional
The safety and reliability can be improved.

[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,
3 (a) and 3 (b) are operation flow charts of the program of the CPU in the above embodiment, and FIGS. 4 (a) to (e) and FIGS. 5 (a) to (d) are the above embodiment. FIG. 6 is a diagram showing a relationship between a person and a detection area for explaining the operation, FIG. 6 is a diagram showing a detection area of a door opening / closing control device in which the detection area is divided into two, and FIGS. 7 and 8 are conventional doors. FIG. 9 is a diagram for explaining a detection area of the opening / closing control device, FIG. 9 is a diagram showing a relation between a detection area and a person for explaining conventional problems, and FIG. 10 is a functional block diagram of a conventional door opening / closing control device. Fig. 11, Fig. 11 and Fig. 12 are block diagrams for explaining the conventional detection area forming method and a diagram of the formed detection area, and Fig. 13 is used for the conventional door opening / closing control device. FIG. 14, FIG. 14 and FIG. 15 show an example of a light emitting and receiving device which is used to explain the operation of the conventional door opening and closing control device It is a diagram showing the order of the people the relationship between the detection area. 10 …… Emitter / receiver, 20 …… Automatic door, 30A, 30B …… Detector, CPU …… Main control unit, A, B1, B2 …… Detection area, B1a to B1d, B2a to B2d …… Small 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 the door opening / closing control device, the detection area formed by at least one of the detection devices is divided into two stages, a near door detection area near the door and a far door detection area, and both detection areas are at least in the door opening / closing direction. It is divided into three small detection areas, and on condition that a person has entered the detection area formed by the other detection device, the near door detection area is masked until the door open signal output by the other detection device disappears. The one of the detection devices is set to the output prohibited state, and the far door detection area is masked by the person on the condition that the person has moved to the near door detection area via the other detection area. Inspection The output prohibition state of the one detection device is continued until the user exits the area, and when a person enters two small detection areas that are not adjacent to each other among the plurality of small detection areas, the output of the one detection device is output. A door opening / closing control device that releases a prohibited state. 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.