JPH0480191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for controlling the opening and closing operations of an automatic door in accordance with the frequency of foot traffic.

Conventional technology In conventional automatic doors, the human body detection signal is turned on.
When this happens, the door opens and starts operating, and the human body detection signal is activated.
When the door is turned OFF and the door is fully opened, the door is held open for a predetermined period of time, and then the door closes. After the door is reversely opened and held open for a predetermined period of time, the door is closed again.

Problems to be Solved by the Invention However, in the conventional automatic door mentioned above, the time for which the door is held open, that is, the time it is held open, is fixed, so when there is a high frequency of foot traffic, for example in the morning, When the door starts to close and leaves the office in the evening, or during lunch breaks, a person comes and the human body detection signal turns on when the door starts to close but before it closes completely, that is, when the door is about to close.
By doing so, the number of times the door opens, or the so-called reversal operation of the door, increases.

For this reason, the motor rapidly repeats forward and reverse rotation many times, which causes heating, and causes impactful force to be applied many times to the door, belt, etc., shortening the life of the automatic door.

Means and action for solving the problem By increasing the open holding time in proportion to the number of times the door is reversed while the door is completely closed, the door can be held in the open position for a long time when there is a lot of foot traffic. This makes it possible to reduce the number of times the door is reversed.

Embodiment Figure 1 is a schematic diagram of an automatic door, and the drive pulley 1
A door 4 is connected to a belt 3 that spans between a driven pulley 2 and a driven pulley 2, and the drive pulley 1 is connected to a motor 6 via a speed reducer 5. By rotating the motor 6 in the forward and reverse directions, the door 4 can be opened and closed. It is designed to close.

An opening deceleration point detection switch 7 and an opening end detection switch 8 are provided on the opening end side of the door 4, and a closing deceleration point detection switch 9 and a closing origin detection switch 10 are provided on the closing end side. The detection signals of each switch are input to the control circuit 11, and the control circuit 11 also has a human body detector 1.
2, the human body detection signal _R1 is input.

The control circuit 11 includes a sequence circuit 13 and a speed control circuit ₁₄ as shown in FIG.
Open/close/high speed/low speed/brake signals are input to the motor 4, and the motor 6 is rotated forward/reverse so that the door 4 performs normal opening/closing operations. The opening holding time calculation setting circuit 16 calculates the opening holding time based on the opening holding time, and changes the opening holding time as shown in FIG. It is equipped with a normal open holding time setting device 17 and a dial 18 for changing the holding time.

An example of the opening/closing operation of a door by the opening/closing control method according to the present invention will be described below with reference to the time charts shown in FIGS. 1 to 3 and 4.

(1) When the human body detection signal _R1 is turned on from the human body detector 12, the motor 6 rotates forward and the door 4 moves open until it reaches the opening end. After this, human body detection signal R ₁
When OFF, normal open hold time setting device 17
After the open holding time _t1 set in has elapsed, the motor 6 reverses, the door 4 moves to close, and stops at the closing origin. This operation is shown in FIG.

(2) In the same way as in (1) above, if the human body detection signal R ₁ turns ON again after the door 4 starts to close and before it reaches the closing origin, the motor 6 immediately switches to normal rotation and the door 4 moves to open. do. As a result, the reversal number counting circuit 15 counts 1, and the open holding time calculation setting circuit 16 calculates and sets the open holding time t ₂ (t ₂ > t ₁ ) corresponding to the number of reversals. When the open holding time _t2 has elapsed since the human body detection signal _R1 was turned off, the motor 6 is rotated in reverse to close the door 4.

In this way, when the door 4 is reversed once, the open holding time becomes longer from t ₁ to t ₂ , and the time from when the human body detection signal R ₁ turns OFF after one reversal operation until the start of the closing movement is extended. Since it takes a long time, even if people come in succession and the human body detection signal R ₁ turns on again, door 4 will not be activated.
As shown in Fig. 4, the door 4 does not reverse even if the third human body detection signal _R1 is input, so the number of times the door is reversed can be reduced, and the door can be kept open during normal operation. The time _t1 can be made shorter than before, which shortens the opening time during normal operation and saves energy during heating and cooling.

(3) As shown in FIG. 4, after the door 4 reverses once and the human body detection signal R ₁ turns OFF, the open holding time t ₂ elapses, the motor 6 reverses, and the door 4 starts to close and move. If the human body detection signal R ₁ turns ON again before reaching the closing origin, the motor 6 rotates forward and the door 4 moves open, that is, when the second reversal operation is performed, the reversal count circuit 15 counts 2, and then Therefore, the open holding time calculation setting circuit 16 is
Open holding time t ₃ corresponding to the number of reversals (t ₃ > t ₂ >
t ₁ ) is calculated and set, and thereafter the door 4 is held in the open position for a time t ₃ after the human body detection signal R ₁ is turned off.

In this way, if the reversing operation is performed a plurality of times between when the door 4 is opened and until it is completely closed, the open holding time becomes longer in proportion to the number of times the door 4 is reversed, so that the probability of the reversing operation decreases.

In other words, as the frequency of people passing by increases, the opening holding time becomes longer, and the time from when the human body detection signal turns OFF until the door 4 starts closing becomes longer. remains open and the inversion operation does not occur.

FIG. 5 shows a specific example of the reversal number counting circuit 15 and the open holding time calculation setting circuit 16, including a counter 20 that counts the number of reversals, a first timer 21 that changes the set time according to the counted value, and a knob 22. A second timer 23 for changing the set time, and a first and second timer 23 for changing the set time.
The counter 20 outputs zero when the CL signal is H, and counts 1 at the rising edge of the CK signal when the CL signal is L. When the signal is H, output is prohibited, and when the CL signal is L, the signal is output for a set time.

The details will be explained below along with the operation.

When the door 4 is at the closing origin, the ON signal of the closing origin detection switch 8 is input to the R of the first flip-flop 24, and θ becomes H and L, so the CL signal of the counter 20 becomes H and the counter 20
is cleared.

If the human body detection signal R ₁ turns on in this state, the first
Signals are input to S of the second flip-flops 24 and 25, and θ becomes H.H is input to B of the first AND gate 26, and the open signal H becomes the second flip-flop.
It is output from the flip-flop 25, and L is input to the CL of the counter 20.

On the other hand, since H is input to A and B of the first OR gate 27 and outputs H, the first and second timers 2
Since H is input to CL 1 and 23 and no signal is output, the output of the second OR gate 28 becomes L,
The first AND gate 26 outputs H, the motor 6 rotates forward, and the door 4 opens and moves. At this time, since H is input to B of the second AND gate 29, the output becomes H and the counter 20 counts 1.

When the door 4 reaches the opening end, the opening end detection switch 10 is turned on and the second flip-flop 25 is turned on.
Since θ becomes L, a close signal L is output.

When the human body detection signal R ₁ turns OFF, L is input to A and B of the first OR gate 27, so the output becomes L, and the CL of the first and second timers 21 and 23 becomes L.
is input and outputs a signal, but the first timer 2
1 is set as the time corresponding to 1 on the counter 20, but since this time is shorter than the time set on the second timer 23, the second timer 23 outputs a signal for the set time _T1 , and the second OR gate 2
8 outputs H for that time, A of the first AND gate 26 becomes L, and the output becomes L, so the door 4 is stopped. In other words, the set time T ₁ becomes the open holding time t ₁ .

Then, after the set time has passed, the first or gate 2
7 becomes L and the output of the first AND gate 26 becomes H, an operation signal is output and the motor 6
is reversed and the door 4 moves to close, and when it reaches the closing origin, the closing origin detection switch 8 turns on and inputs to R of the first flip-flop 24, and since θ becomes H and θ becomes L, the first AND gate 26 L is input to B and the output becomes L, so the motor 6 stops and the door 4
stops.

On the other hand, if the human body detection signal _R1 is input again before the door 4 moves to close and reaches the closing origin, it will operate in the same manner as described above, but since the counter 20 has not been reset, the counted value will be 2, and the first timer 2
Since the set time of 1 is longer than the set time of the second timer 22, the time for keeping the door 4 open becomes longer.

Effects of the invention: When there is a high frequency of foot traffic, the door can be held in the open position for a long time, reducing the number of times the door flips over, which reduces heating of the motor and reduces impact force acting on the door, belt, etc. The number of times is reduced and the lifespan of the automatic door can be improved.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, in which Fig. 1 is a schematic diagram of an automatic door, Fig. 2 is an explanatory diagram of a control circuit, Fig. 3 is a chart showing the relationship between the open holding time and the number of reversals, and Fig. 4
Figure 5 is an operation time chart, and Figure 5 is a circuit diagram showing a specific example of a reversal count circuit and an open holding time calculation setting circuit.

Claims (1)

[Claims] 1 When the human body detection signal turns on, open the door and move.
In a door opening/closing control method in which the door is held open for a predetermined period of time after the human body detection signal is turned OFF and the door is fully opened, the door is closed and moved. A new human body detection signal is detected between when the door is closed and when it is completely closed.
When turned on, the door is reversed, and the number of times the door is reversed is counted until it is completely closed.
A door opening/closing control method for an automatic door, characterized in that the opening holding time is lengthened in proportion to the number of times the door is reversed.