JPS62152383A - Control unit for motor driven automatic switching equipment - Google Patents

Abstract

PURPOSE:To make it possible to detect the state of equipment with a simple constitution by monitoring the voltage between a commercial power source and one of the change-over contacts that gets the motor to rotate normally and reversely. CONSTITUTION:When a open switch 25 is pressed, first and second relays 18 and 21 are energized and a motor 12 rotates normally. When a close switch 26 is pressed, the second relay 21 only is energized and the motor 12 rotates reversely. If the load is totally opened or totally closed, limit switches 15 and 16 will operate. A photodiode 32a is connected between a commercial power source 14 and an normally open contact 20b of the change-over contacts 20 of the first relay 18. A capacitor 42 is charged and discharged in switching a phototransistor 41 on and off. A comparator 43 compares the voltage of the phototransistor 41 with a set value. Judging from the output of the comparator 43, the loaded condition is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a control device for motor-driven automatic opening/closing equipment such as electric shutters, lids, electric blinds, etc., which are opened and closed by driving a motor. Technology Conventionally, automatic opening/closing equipment that uses a motor to open and close is the fourth type.
The electrical circuit has an electrical circuit configuration as shown in the diagram. It consists of Reference numeral 4 denotes a single-phase, two-winding type motor, which performs forward and reverse operations depending on the action of an external capacitor 6 and which winding is applied a voltage with the operation switch 2. Reference numeral 6 denotes a first limit isona, whose contact opens to stop the motor 4 when the motor 4 completes a predetermined forward (reverse) rotation operation (for example, when the electric shutter is completely opened). 7 is the second Rimi Notosi 1.
Then, when the motor 4 completes a predetermined reverse (forward) rotation operation (for example, when the electric shaft lid is completely closed), the contact is opened to stop the motor 4.

Furthermore, if the operating switch 2 is turned off while the motor 4 is in operation, the motor 4 will stop at that point.

Incidentally, FIG. 4 shows the electric shutter in a state where the shutter and the lid are completely closed and stopped.

Problems to be Solved by the Invention In the above-mentioned conventional motor-driven automatic opening/closing device 3 (hereinafter referred to as the device), there is a method to separately define what state the device 3 is currently in (fully open, fully closed, or halfway). Even if an attempt is made to monitor (monitor display) using the control device, it is impossible if the operation switch 2 is in the stop position. As a solution to this problem, the first and second limit switches 6.7 are separated from the current path of the motor 4 and used only for monitor signals, and the monitor signals are used to drive and control the motor 4.
One possible method is to provide a control device that stops and displays the device 3 on a monitor, but this method requires changing the wiring specifications of the device 1 itself in order to detect the status of the device 3, making it less versatile. In addition, if the control device malfunctions, even though the device body 1 is fully open, it will cause the motor 4 to rotate in the direction of opening the device body 1, applying unreasonable force, and causing a bad situation. , there is a problem that the device main body 1 may be damaged.

SUMMARY OF THE INVENTION Therefore, the present invention provides a control device that can reliably operate a motor-driven automatic opening/closing device without changing the wiring specifications of the device, and can detect the state of the device with a simple configuration. .

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention has two limit switches of the main body of the conventional motor-driven automatic opening/closing machine and two limit switches of the motor that are inserted into one end surface of the commercial power supply. A single-pole, double-throw switching contact that switches the current path to the windings to operate the motor in the forward or reverse direction, and a switch that is inserted between the common end of the two windings of the motor and the other end of the commercial power supply A stop contact for stopping the operation is provided, and the voltage between the other end of the commercial power source and at least one contact of the switching contact is taken out as an open/close state detection signal of the device.

Effect of the Invention With the above-described configuration, the present invention can detect the drive/stop and open/close state of the motor-driven automatic opening/closing device body with a simple configuration without changing the wiring specifications of the device body itself. It is also possible to prevent a decrease in the reliability of operation of the automatic opening/closing device due to state detection.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

Figure 1 shows a motor-driven automatic opening/closing device (hereinafter referred to as the device).

) and its control device, which controls an electric shutter as the device used.

Reference numeral 11 denotes a motor-driven automatic opening/closing device; in this embodiment, an electric shutter is shown; 12 is a motor having two windings and operating in forward and reverse directions to open and close a shutter (not shown); So, the first winding 12 & and the second winding 12
A capacitor 13 is connected to one end surface of b, and the other ends thereof are connected to a commercial power source 14 as a common end. When the commercial power source 14 is connected to the first winding 121L, The first winding 122L becomes the main winding, and the second winding 12b is connected to the commercial power supply 14 through the capacitor 13f, so it functions as a so-called auxiliary winding, and the motor 12 rotates in the normal direction, and the shutter Move it in the direction of opening. On the other hand, when the commercial power supply 14 is connected to the second winding 121), the second winding 12b becomes the main winding, and the first winding 12b becomes the main winding.
& become auxiliary windings, the motor 12 performs a reverse operation and moves the shutter in the closing direction.

15.16 are the first and second windings 122L of the motor 12;
The first limit/seven point suite (hereinafter referred to as LSI) consists of single-pole, single-throw type contacts connected in series to the LSI.

) and the second limit switch (hereinafter referred to as LS2), when the motor 12 completes the predetermined normal rotation operation and the shutter changes from the opening operation to the fully open state (fully open), LS1
The contact 16 is opened to cut off the current, stop the normal rotation of the motor 12, and prevent the shutter from opening any further. In addition, the motor 12 completes a predetermined reverse operation and the shaft/lid changes from a closing operation to a completely closed state (1).
When the shutter is fully closed), the contact of the LS216 opens to stop the reverse rotation of the motor 12, thereby preventing the shutter from closing any further. That is, the contacts of the LSI 15 open only when the shutter lid is fully open, and the contacts of the LS 216 open only when the shutter is fully closed.

A control device 17 drives and stops the main body 11, and detects and displays the open/closed state of the shutter. On the 1st, the first relay consists of a first relay coil 19 and a single-pole double-throw switching contact 2o, the common terminal 202L of the switching contact 20 is connected to one end 14a of the commercial power supply 14, and the normally open contact 20b is connected to the main body 1
1(7) The normally closed contact 20C is connected to the LS116 and the LS216, respectively.

21 is a second relay coil 22 and a normally open stop contact 23
The stop contact 23 is connected to the other end 14b of the commercial power supply 14 and the first and second windings 1211. of the motor 12.
Insert it between the common ends of 12b.

ing.

24 is a switch circuit, an open switch 25 and a close switch 2.
6 and a stop switch 27, and one end of these sui-sote 26 to 27 are both ten poles of a DC power supply 28.
vcc, and the other end is input to a microcomputer (hereinafter referred to as microcomputer) 29, respectively. The microcomputer 29 sends commands to the relay drive circuit 3o based on these input signals, and the relay drive circuit 3o drives and stops the first relay 18 and the second relay 21.

When the open switch 26 is pressed, the command from the microcomputer 29 causes
The relay drive circuit 30 includes the first and second relays 18 and 22.
"t: Both are driven, and the first relay coil 19 is excited, so that the common terminal 20 & of the switching contact 2o becomes the normally open contact 2.
0b, and the second relay coil 22 is energized, thereby closing the stop contact 23. Next, when the stop switch 27 is pressed, the driving of only the second relay 21 is stopped and the stop contact 23 is opened.

When the close switch 26 is pressed, the drive of the 1st relay 18 is stopped, the common terminal 20& of the switching contact 20 is connected to the normally closed contact 20C, and the 2nd relay 21 is driven to make the stop contact. 23 closes.

Note that FIG. 1 shows a state in which the close switch 26 is pressed, the shutter is lowered, the shutter is fully closed, and the LS 216 is opened.

31 is a state detection circuit that detects the open/closed state of the shutter;
A photocoupler 32 and a diode 33, which are optical coupling terminals,
It is composed of first to seventh resistors 34 to 40, a first transistor 41, an electrolytic capacitor 42, and a comparator 43 consisting of an operational amplifier. Commercial power supply 14
It is connected between the other end 14b and the normally open contact 2Ob of the switching contact 2o, and serves as an input to the state detection circuit 31, and when an AC voltage is applied between them, the photodiode 32a is activated during the half cycle of the AC voltage. A current flows through to emit light, making the phototransistor 32b conductive and connecting the second and third resistors 35 and 36.
A current is applied to the first transistor 41 to make it ioH.

During the other half period of the AC voltage, the first transistor 41 is turned off because the diode 33 connected in antiparallel to the photodiode 32& is conductive. That is, when an AC voltage is applied, the first transistor 41 repeats 0N10FFi every half cycle of the AC voltage.

The electrolytic capacitor 42 charged by the sixth resistor 38 is
When the first transistor 41 turns on, the fourth resistor 3
When the first transistor 41 is turned off, the fifth resistor 38 is charged again, and the charging and discharging process is repeated. If the voltage is set to 1, the force of the discharging current becomes larger than that of the charging current, and therefore the voltage of the electrolytic capacitor 42 can only rise to a voltage considerably lower than vcc. Since the value is lower than the voltage obtained by dividing vcc by the seventh resistor 39.40, the output of the axis ratio device becomes rJ.

On the other hand, when no AC voltage is applied to the series connection of the photodiode 32a and the first resistor 34, the first transistor 41 is in the OFF state, so the electrolytic capacitor 42 is charged by the fifth resistor 38, and the voltage becomes vcc. So, the 6th. Since the voltage is higher than the voltage obtained by dividing vcc by the seventh resistor 39.40, the output of the comparator 43 becomes "H".

44 is a status display circuit, which is composed of a second transistor 46, an LED 46 which is a light emitting diode, and an eighth resistor 47, and the output of the comparator 43 of the status detection circuit 31 is rH.
”, the second transistor 45 turns on according to a command from the microcomputer 29, and the LED 46 lights up.

Next, the operation of this embodiment will be explained with reference to FIGS. 1 and 2.

FIG. 2 is an operation mode diagram showing the states of the switching contact 20 and stop contact 23 of the control device 11 and the state of the main body 11.

In FIG. 2, vl and vl are the voltages that serve as open/close state signals for the shower shower, vl is the voltage between the other end 14b of the commercial power supply 14 and the normally open contact 2Ot1 of the switching contact 2o, and vl is the voltage between the other end 14b of the commercial power supply 14 and the normally open contact 2Ot1 of the switching contact 2o. 141) and the normally closed contact 2oC of the switching contact 20.

First, what happens to the voltage V in each operation mode will be explained.

When the common terminal 20& of the switching contact 2o is connected to the normally open contact 20t), the commercial power supply 14 is not applied when the motor is stopped with the motor fully open, when the motor is stopped halfway with the E rising state, and when the F motor is rising. Therefore, V becomes rH. In addition, when B is lowering or C is stopped midway in the lowering state, the common terminal 20& of the switching contact 20 is connected to the normally closed contact 20cK, and LSL 15
and Ls216 are both closed, so one end 14L of the commercial power supply 14 is a switching contact 2o%LS216, capacitor 13
and I, 5115'i to the normally open contact 20b, so vl is still rH.

When D is fully closed and stopped, LS216 is open, so the normally open contact 20b of the switching contact 2o is connected to one end 1 of the commercial power supply 14.
Since it is separated from 4a, vl becomes "L". Although not shown in FIG. 2, when the stop switch 27 is pressed to open the stop contact 23 while the motor is stopped with D fully closed, the state becomes "L" in the same way.

From the above, vl is rL4 only when the shower is completely closed, and is rH in other cases, so vl
By using this as the shower open/close state signal, it is possible to detect whether the shutter is fully closed or not.

Next, what happens to voltage v2 in each operation mode will be explained in the same way as v1.

During the descent of B, when stopping midway with C in the lowering state and stopping with D fully closed, the commercial power supply 14 is applied to vl, so rH
”. In addition, if E is stopped midway in the rising state and F is rising, the common terminal 20a of the switching contact 20 is the normally open contact 2.
Since LS115 and S216 are both closed, one end 14& of the commercial power supply 14 is connected to the switching contact 20.
．． It will be connected to the normally closed contact 2C1 via LS115, capacitor 13 and LS216i, and vl will also become rH.

When A is fully open and stopped, LS115 is open, so the normally closed contact 20C of the switching contact 20 is disconnected from one end 141L of the commercial power source 14, and vl becomes rL. Also,
Even if the stop contact 23 is open in this state, vl is rL
”.

From the above, vl is "rL" only when the shaft lid is fully open, and "rH" in other cases.
By using this as the open/closed state signal of the shower lid, it is possible to detect whether the shower shower is fully open or not.

In this embodiment, as shown in FIG.
Since the voltage ("V+) between the normally open contact 20b of the main power source 14 and the other end 14a of the commercial power supply 14 is input to the state detection circuit 31, it is possible to detect whether the shutter is fully closed. When the shutter is fully closed as shown in the figure, vl in FIG. 2 becomes rLJ, so the state detection circuit 3
The output of the comparator 43 of No. 1 becomes rH, and the status display circuit 4
The No. 4 LED 46 lights up.

From the above, when the lid is completely closed, L!
Since the D46 is lit and the LED 46 is turned off when the shutter is opened even a little, it is possible to monitor whether the shutter lid is completely closed or not. This means that
This is particularly effective when the main body 11 and the control device 17 are installed at separate locations. In addition, the main body 11 is highly versatile because it can use the same wiring specifications as the conventional one.
Since the opening/closing operation can be stopped by S115 and LS218, there is no risk of deterioration in operational reliability.

FIG. 3 shows another embodiment of the present invention, which differs from the first embodiment in that it detects the open/closed state of the shutter by providing two state detection circuits. This allows for detailed monitoring.

Only the points different from the first embodiment will be explained below.

Reference numeral 48 denotes a first state detection circuit configured and connected in exactly the same manner as the state detection circuit 31 of the first embodiment, and outputs rHJ only when the shutter is fully closed.

49 is a second state detection circuit whose configuration is exactly the same as the first state detection circuit 48, but the input is the voltage v2 between the other end 14b of the commercial power supply 14 and the normally closed contact 200 of the switching contact 2o, Therefore, rH'' is output to the microcomputer 29 only when the shutter lid is fully open, and rLJ is output when the shutter is in any other condition.

60 is a status display circuit, open display LKD51, closed display L
ED52. It is composed of intermediate display LED 53, etc.
The open indicator LED 51 lights up according to a command from the microcomputer 29 when the shutter is completely open, that is, when the output of the first state detection circuit 4B is rLJ and the output of the second state detection circuit 49 is rHJ, and the close indicator LICD 52 lights up when the shutter is completely opened. is completely closed, that is, the output of the first state detection circuit 48 is rH.
J and the output of the second state detection circuit 49 is "rL", the intermediate display LIED 60 lights up, and the intermediate display LIED 60 is in the so-called intermediate position when the shutter is fully open or not fully open. Second state detection circuit 4
It lights up when both outputs of 8.49 are "L".

From the above, when the shutter is completely open, the open indicator LgD51 lights up, when the shutter is completely closed, the close indicator LKD52 lights up, and in other states, the intermediate indicator LED 63 lights up. , 1st
It becomes possible to monitor the opening/closing state of the shutter in more detail than in the embodiment described above.

In addition, in FIG. 3, the switch circuit 24. of FIG. 1 of the first embodiment is shown. Since the relay drive circuit 30 and the first and second relays 18, 21 are the same, some or all of them may be omitted.

Effects of the Invention As is clear from the above explanation, according to the present invention, the open/close state detection of a motor-driven automatic switching device is performed using at least one contact of a switching contact that switches the current path to the winding to rotate the motor in the forward or reverse direction. It can be realized with a simple configuration that only requires monitoring the voltage between There is no reduction in the reliability of operation of automatic opening/closing equipment.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram showing an embodiment of the device main body and the control device for motor-driven automatic opening/closing equipment of the present invention, and Fig. 2 is the state of the device main body and the switching contacts and stop contacts of the control device of the present invention. FIG. 3 is an electric circuit diagram showing the main body of the device and another embodiment of the control device for the motor-driven automatic opening/closing device of the present invention, and FIG. 4 is a diagram showing the conventional motor-driven automatic opening/closing device. It is an electrical circuit diagram. 12...Motor, 13...Capacitor, 14...Commercial power supply, 15...1st limit switch, 16...2nd limit 2 stomach·
Sochi, 17...Control device, 2o...Switching contact, 23...Stop contact. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Zuzuka and procedural amendments 1939-Mon/No.

Claims (1)

[Claims] A motor has two windings and operates in forward and reverse directions due to the action of a capacitor inserted between these windings.The motor is connected in series to each winding of this motor, and the motor operates in a predetermined forward or reverse direction. For a motor-driven automatic opening/closing device body consisting of two limit switches that cut off the current to the windings and stop the motor operation when the motor operation is completed, a motor-driven automatic opening/closing device is inserted between the two limit switches and one end of the commercial power supply. a single-pole double-throw switching contact that switches the current path to the two windings of the motor to operate the motor in forward or reverse rotation; and a common end of the two windings of the motor and the other end of the commercial power supply. a stop contact that is inserted into the motor to stop the operation of the motor, and a voltage between the other end of the commercial power supply and at least one contact of the switching contact is used as a switching state signal. Control device.