JPS6356391B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic door using an electronic circuit such as a microcomputer as a control means.

FIG. 1 shows a schematic configuration diagram of a conventional automatic door. is rotated, and the V-belt 8, which is stretched between the main pulley 6 and the driven pulley 7, is reciprocated. The door 11 is movably disposed on the running rail 9 and has a hanging metal fitting 1 on the door 4.
The suspension fittings 10 and 10' are connected to a part of the V-belt 8 so that it can run left and right. The traveling position of the door 11 is determined by the two pairs of reed switches 1A, 1b, 1c, and 1d provided at the opening/closing end positions of the door 11, respectively, and the reed switches 1a, 1a, and 1d provided at the upper end of the hanging fitting 10, respectively.
It is designed to be detected by permanent magnets 3 for driving 1b, 1c, and 1d. The reed switch 1a detects the stop position on the open side, and the reed switch 1b
The reed switch 1c is for detecting the brake start position during the opening operation, the reed switch 1c is for detecting the brake start position during the closing operation, and the reed switch 1d is for detecting the push operation position. When a command is given to such an automatic door to open the door 11, the motor 5 rotates and opens the door 1.
1 opens in the direction shown by arrow A, and when the permanent magnet 3 reaches the position of the reed switch 1b, the brake is activated and the door 11 temporarily stops.After that, the speed of the door 11 becomes a slow speed, and then the permanent magnet 3 When the reed switch 1a reaches the position, the door 1 stops. Once the door 1 is opened, it remains open for a predetermined period of time, and when this period of time has elapsed, the motor 5 starts rotating in the opposite direction.
The door 11 closes in the direction shown by arrow B. However, when the permanent magnet 3 reaches the position of the reed switch 1c, the brake is activated again and the door 11 temporarily stops.After that, the speed of the door 11 becomes a slow speed, and then the permanent magnet 3 reaches the position of the reed switch 1d. Then, the door 11 will stop.

In this way, in the conventional automatic door, the door 11 is temporarily stopped just before the door 11 fully opens and immediately before it closes completely, and then the speed of the door 11 is set to a slow speed, thereby causing the door 11 to collide in the direction 45. This prevents the hanging metal fitting 10 from colliding with the pulley 7, and increases the opening/closing speed of the door 11 as a whole. However, in such an automatic door, if a command is given to open the door 11 again when the door 11 has started to close a little, the door 11 will not stop immediately before it fully opens, so the door 11 will not be at the stop position. There were cases in which the crane passed by and collided with the direction 45, and the hanging fitting 10 collided with the pulley 7.

FIG. 2 explains this operation, and as shown in the same figure, when the door 11 is about to close, the door 1 is moved again until the permanent magnet 3 comes to the position indicated by the arrow _P1 .
When a command is given to open the door 1, the brake is activated at the reed switch 1b, and the door 11 is temporarily stopped at the location indicated by the arrow _Q1 . Therefore, in this case, the door 11 will not go too far. Furthermore, even if a command is given to open the door 11 again when the door 11 is about to close until the permanent magnet 3 reaches the position shown by the arrow P ₂ , the travel distance of the door 11 to the stop position Q ₂ is extremely long. Since it is short, the door 11 is stopped at the position shown by the arrow _Q2 by the brake activated when the permanent magnet 3 passes the reed switch 1a. However, permanent magnet 3 is pointing to arrow P ₂
If a command is given to open the door 11 again when the door 11 is about to close until it reaches the position shown in , the distance traveled by the door 11 to the stop position Q ₂ is quite long, and furthermore, the distance traveled by the door 11 is quite long, Since the door 11 does not stop once at the position shown in ₁ , even if the door 11 is driven at a creeping speed, the inertial force is large and the door 11 passes the stop position shown in arrow _Q2 .
A problem arises in that the door 11 collides with the direction 45 or the hanging fitting 10 collides with the pulley 7.

The present invention has been made to solve these problems of the conventional example, and even when a command is given to open the door again when the door is about to close, the door remains at the stopped position. To provide an automatic door that can prevent situations such as passing by and colliding with the bearing or a hanging metal fitting colliding with a pulley.

The configuration of the present invention will be described below with reference to illustrated embodiments. FIG. 3 is a block diagram showing a control circuit for an automatic door according to an embodiment of the present invention. (In the embodiment, the main component circuit is composed of a one-chip microcomputer, but it is shown as a block for explaining the operation.) The drive mechanism of the door 11 and the position detection mechanism of the door 11 are shown in FIG. It uses a structure similar to that of an automatic door. The switch signals from each of the reed switches 1a to 1d are input to the door position determining circuit section 12 and stored and held in the door position determining circuit section 12. The door position determination circuit section 12 has an operation memory area for each reed switch 1a to 1d, and resets each operation memory area to "0" when the first door 11 is opened after power is turned on.
After that, the stored contents are inverted every time a switch signal is input, and the data of each control contents is transferred to the motor control circuit section 1 based on the contents of the recording area.
3. It is designed to output to the 3/4 time storage circuit section 15 for half open and full open. The detector 16 is located on the front of the door 11,
It is composed of something like an ultrasonic detector placed on the back side, and is designed to detect when a person passes, and the detection signal is sent to the passing person judgment circuit section 17.
It is also input to the opening process determination circuit section 18. 19
is a mode select switch circuit section, and this mode select switch circuit section 19 is for selecting the degree of opening of the automatic door, "fully open" and "half open".
It is possible to select between "3/4 open" and "automatic". That is, the mode is determined by the mode determination circuit section 20, and the output is output to the motor control circuit section 13 via the mode determination circuit section 20 so that control according to the mode is performed. The mode determination circuit unit outputs a signal to the person judgment circuit unit 13, and when set to “auto”, outputs a signal that is controlled by the output signal of the passing person judgment circuit unit 17 and instructs the opening condition of the door 11 according to the number of people who have passed in the past. It is output to the motor control circuit section 13 via 20. Reference numeral 21 denotes an open timer, and this open timer 21 is used to keep the door 11 open for a predetermined period of time by counting from the time when the door 11 is fully opened and there is no detection input. The operation is performed according to the full open detection signal or the timing signal corresponding to the mode of "half open", "auto", or "3/4 open" outputted via the mode determination circuit section 20 and the contents of the open process determination circuit section 18. It's about to start. Note that the operating time of the open timer 21 can be arbitrarily set using the selector 21a.
The half-open/full-open 3/4 time storage circuit section 15 determines the time corresponding to each degree of opening from the time required to fully open the door 11, and outputs a signal at the corresponding timing from the start of opening to the mode determination circuit section. The signal is outputted to the motor control circuit section 13 via 20.

The motor control circuit section 13 has a circuit as shown in Fig. 4, and the direction of rotation of the motor 5 is determined by a switch SW ₁ for moving the door to the left (open) and a switch SW ₂ for moving the door to the right (close). When the switch SW ₃ of the brake circuit 24 is turned on, the motor 5 is braked, and when the attached switch SW ₄ of the creeping circuit 25 is turned on, the motor 5 is reduced to an appropriate rotational speed to reduce the running speed of the door 11 to the creeping speed. I'm starting to let them do it. Further, 29 is a running resistance check switch circuit, which closes the switch SW ₅ when the running check switch SWa is turned on, and sets the torque of the motor 5 to the minimum motor torque that allows the door 11 to run during normal construction. When the door 11 stops midway, it is possible to detect that there is an abnormality in the construction. Further, reference numeral 41 denotes a maximum creeping circuit, and when the switch SW ₆ is turned on, the traveling speed of the door 11 can be set to the maximum creeping speed which is even slower than the creeping speed by the creeping circuit 25.

However, switch SW ₁ is open processing judgment circuit section 1
The switch SW ₂ is turned on by the closing signal output when the push operation timer 27 or the release timer 21 times up, and the switch SW ₃ is turned on by the opening signal of the switch SW 8.
is turned on by the brake signal output during the operation of the brake timer 26, the switch _SW4 is turned on by the slowing signal of the door position determination circuit section 12 and the start timer circuit 28, which will be described later, and the switch _SW5 is turned on by the running resistance check switch SWa. The switch SW 6 is turned on when the door is closed, and the switch _{SW 6} is turned on when a switching circuit 43 connected to a door reversal detection circuit ₄₂ (to be described later) is operated. Consists of operating relay contacts. In Fig. 4, CH is a chiyoke coil, D ₁ , D ₂
is a diode, and C is a capacitor.

Next, the brake timer 26 is operated by the mode determination circuit section 2.
The operation starts with a signal output from 0 at a predetermined timing or a predetermined signal of the door position determination circuit section 12, and the door 11
In the opening process, only the brake signal is applied, and in the closing process, the brake signal and the push operation timer 27 are used.
An operation start signal is output when time-up occurs. The push timer 27 operates for approximately one second from the time the brake timer 26 times up to fully close the door 11. Furthermore, the start timer circuit 28 is a timer for setting the rotational speed of the motor 5 to a creeping speed for a predetermined period of time when the automatic door is turned on after construction of the automatic door is completed.

In the passing person determination circuit section 17, the detector 1
The detection output of 6 is counted by the counter 40, and the 9-stage shift register 36 is counted by the counter 40, and the clock pulses of the clock circuit 30 are set at intervals of, for example, 3 seconds.
By shifting the output, the number of detection signal outputs from the detector 16 in the past 30 seconds is counted through an adder 37, and this counting result is compared with a comparison standard value by a comparator 38, and the number of passing persons is less than the standard value. It is the one that generates the comparison output. Further, in the half-open/full-open 3/4 time memory circuit section 15, when the door 11 is in the fully open operation mode, the timer 31 for opening operation memory counts the time from when the door 11 starts to open until it finishes opening. It is stored in the storage calculation unit 32. This memorized time is used to set the opening position of the door 11 in the later half-open mode or 3/4-open mode. In other words, the divider 3
3, the time required for half-opening or 3/4-opening is determined, and the determined target time and elapsed time are compared by the comparator 34, and when they match, a comparison output is output from the comparator 34. It is a familiar thing.

Next, the opening/closing operation of the automatic door of the present invention will be explained. Assume that the mode select switch circuit section 19 is set to "fully open", and when the detection signal from the detector 16 is opened and input to the processing judgment circuit section 18,
The switch SW ₁ of the motor control circuit section 13 is turned on by the opening signal, and the motor 5 rotates in the direction in which the door 11 opens. Then, the door 11 starts to move. When the door 11 moves, the reed switch 1d is operated by the permanent magnet 3, and the next reed switch 1c is operated. When the reed switch 1c normally operates on and off as the door 11 moves, and the next reed switch 1b operates, the door position determination circuit section 12 operates the brake timer 26 for one second, for example, and during that time the thyristor SCR of the brake circuit 24 is activated. ₁ is triggered by turning on the switch SW ₃ , a direct current is applied to the circuit of the motor 5, and the rotation of the motor 5 is braked to temporarily stop the movement of the door 11.

After the brake operation is completed, an opening signal is again outputted via the opening process determination circuit section 18 in response to a signal from the door position determination circuit section 12, and the motor control circuit section 13
At the same time, the switch SW ₁ of the slow drive circuit 25 is turned on by the slow drive signal from the door position determination circuit section 12, and the thyristor of the slow drive circuit ₂₅ is turned on.
When the SCR ₂ is turned on, the rotational speed of the motor 5 is reduced, and the door 11 is slowly moved, and the reed switch 1a is turned on, the output of the opening signal is simultaneously stopped and the switch SW ₁ is turned off, at the same time the brake timer 26 is activated. The signal from the door position determination circuit section 12 is activated in the same manner as described above for one second, and the brake circuit 24 of the motor control circuit section 13 is activated to control the motor 5.
It is designed to brake the rotation of the

Next, when the input to the detector 16 disappears, the open timer 21 counts the clocks of the clock circuit 30 and, after counting a predetermined time, outputs a close signal and turns on the switch SW ₂ of the motor control circuit section 13.
This turning on causes the motor 5 to rotate in the opposite direction, causing the door 11 to move in the closing direction. This running causes the reed switch 1a to operate, and then the reed switch 1b
operates, the closing operation of the door 11 continues, and when the reed switch 1c operates, the door position determination circuit section 12
A signal is output to the brake timer 26, and a brake signal is output from the brake timer 26 for 1 second to turn on the switch SW ₃ of the brake circuit 24. At the same time, the switch SW ₂ is turned off and the rotation of the motor 5 is braked in the same manner as described above. and temporarily stop the door 11. When the above-described application of the brake is completed, a slowdown signal is output from the door position determination circuit section 13, and the switch SW ₄ of the slowdown circuit 25 is turned on, and the switch SW ₂ is also turned on to reduce the rotational speed of the motor 5. The door 11 is slowly moved in the closing direction. When the reed switch 1d operates as the door 11 moves, the brake timer 26 outputs the signal to the door position determination circuit 1.
1 from the brake timer 26 by outputting a signal from 2.
A second brake signal is output to the motor control circuit section 13. This brake signal causes the switch to be turned on again.
SW ₂ is turned off and switch SW ₃ of the brake circuit 24 is turned on to brake the rotation of the motor 5 and completely close the door 11.

By the way, while the door 1 is moving in the closing direction, when a detection signal is input from the detector 16 to the open processing judgment circuit section 18, the switch SW ₁ is turned on and the switch SW ₂ is turned off. However, as explained in FIG. Even if the door 11 is driven in the opening direction at a slow speed, there will be an inconvenience that the door 11 will pass the stop position and collide with the direction 45. Therefore, in the present invention, the door reversal detection circuit 42 detects the reversal of the door 11. The operation is monitored, and if the door 11 is reversed before the permanent magnet 3 of the door 11 is closer to the closing direction than the reed switch 1b, the switch SW ₆ is activated via the switching circuit 43.
The SCR ₄ that is injected becomes conductive.
As a result, the motor 5 rotates at a maximum creeping speed that is even slower than the creeping speed caused by the creeping circuit 25, so that the door 11 may pass the stop position and collide with the mullion 45, or the door 11 may be suspended. It is possible to prevent the metal fitting 10 from colliding with the pulley 7. Note that 44 is a left-right switch, and by operating this switch 44, it is possible to select whether the door 11 opens to the right or to the left.

The present invention is configured as described above, and in an automatic door in which the door is temporarily stopped immediately before the door fully opens and closes, and the subsequent running speed of the door is set to a slow speed, during the door closing operation. When the door is reversed before the stop position sensor operates when the door is opened, a means is provided to set the door running speed to the slowest speed. Even if the door is made longer, the inertial force of the door will not become too large because the moving speed of the door is slow enough, and therefore the door will pass the fully open stop position and collide with the mullion, or the door supporting the door will be damaged. This has the effect of preventing the metal fittings and the like from colliding with the door drive pulley.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a general automatic door, Fig. 2 is an explanatory diagram of the same as above, Fig. 3 is a control circuit block diagram of an automatic door according to an embodiment of the present invention, and Fig. 4 is a diagram of the same as above. FIG. 3 is a specific circuit diagram of a motor control circuit section. 1a to 1d are reed switches, 3 is a permanent magnet,
5 is a motor, 11 is a door, 16 is a detector, 21 is an open timer, 24 is a brake circuit, 25 is a slow running circuit, 41 is a slowest running circuit, and 42 is a door reversal detection circuit.

Claims (1)

[Claims] 1 A motor that drives the door to open and close, a full open stop position sensor and a full close stop position sensor that detect the fully open and fully closed stop positions of the door, respectively, and the positions that temporarily stop the door immediately before it fully opens and closes, respectively. A temporary stop position sensor when open and a temporary stop position sensor when closed, a detector placed near the door that outputs a door opening command, an open timer that sets the door full opening time, a detector and An opening/closing control means that uses the output of a timer to fully open and fully close the door to the operating position of the fully open and fully closed stop position sensors, respectively, and a means that temporarily stops the door when the stop position sensor is activated at the time of opening and closing, and door deceleration means for making the traveling speed of the vehicle a slowing speed;
A door reversing means reverses the running direction of the door by the door opening command output from the detector during the door closing operation, and a door reversing means reverses the running direction of the door by the door opening command output from the detector, and when the door is reversed before the opening stop position sensor operates during the door closing operation. 1. An automatic door comprising: means for setting a running speed to a slowest speed.