JPH0755069B2 - Electric curtain drive - Google Patents

Description

The present invention relates to an electric curtain drive device that controls opening and closing of a curtain with a switch or the like.

[Prior Art] Conventionally, in a plurality of curtain opening / closing controls, the operation switch is continuously input while checking until all curtains are completely opened or closed, or the time is longer than the time when the curtain moves from one end of the curtain rail to the other. The curtain was driven for a certain period of time after the operation switch was input by the set timer or the like.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional ones, the operation switch is continuously input while checking until all curtains are completely opened or closed, or when the curtain opening and closing speeds are different or the curtain rail length is long. When the curtains reach the end of the curtain rail at different times, there will be a difference in the time it takes for the curtains to reach the end of the curtain rail. There is a problem that the motor and the drive circuit generate heat. Further, if the driving is stopped when the end of one curtain rail is reached, there is a problem that the other curtains cannot be completely opened and closed.

Furthermore, when the curtain is driven for a certain period of time after the operation switch is input, when the curtain operates from the middle of the curtain rail, it reaches the curtain rail end much faster than the set time, and the lock motor has lock current until the set time. There was a problem that the motor and drive circuit continue to flow and heat is generated.

The present invention is provided in view of the above points, and in a plurality of curtain controls, all can be completely opened and closed,
Moreover, it is an object of the present invention to provide an electric curtain drive device in which a lock current does not flow to the curtain motor that has reached the end portion first.

[Means for Solving the Problem] The present invention provides a speed detection means for outputting a signal proportional to the speed of the curtain, and a motor coil current to the motor when only one of the curtains is stopped by the output from the speed detection means. It is equipped with an automatic curtain stop circuit that cuts off the power to the entire circuit when both curtains stop.

[Operation] With the above configuration, the motor coil current to the motor is cut off when only one of the curtains is stopped, and the power of the entire circuit is cut off when both of the curtains are stopped.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, a case where two curtains are simultaneously controlled to be opened and closed will be described. FIG. 1 shows a block diagram. The commercial AC power supply 1 is full-wave rectified by a rectifier 3 via a power supply disconnecting relay unit 2, converted into a DC by a smoothing capacitor 4, and sent to DC voltage sources 5 and 6. . The DC voltage sources 5 and 6 exchange the voltage generated at both ends of the capacitor 4 and supply the DC voltage to each of the motors 9 and 10 via the switching switching relay units 7 and 8 to generate signal lines 11, The DC voltage supply is turned on and off depending on the 12 states. In the case of a double-opening curtain, the motors 9 and 10 are incorporated in the left and right curtain rails respectively, and the curtain opens when the current directions of the motor coils are 9a and 10a. The curtain is designed to close when the current flows in the opposite direction.

The encoders 13 and 14 that form the speed detection means are motors 9 and 10.
It generates a pulse with a period proportional to the speed of
The output is input to the monostable multi-circuits 15 and 16. The monostable multi-circuit receives the signals 17 and 18 of the encoders 13 and 14, detects the rising edge thereof, and outputs the pulses of the signals 22 and 23 whose L level period is constant, as shown in FIG. . Therefore, the outputs of the monostable multi-circuits 15 and 16 change from the H level to the L level for a certain period only when the curtain moves and the outputs of the encoders 13 and 14 change.

The electronic control circuit 19 controls the electric signal 21 from the input switch 20.
And, receiving the signals 22 and 23 from the monostable multi-circuits 15 and 16, sends an electric signal to the DC voltage sources 5 and 6 through the signal lines 11 and 12, and the DC voltage supplied to the motors 9 and 10. ON / OFF control of the power supply, an electric signal is sent to the power supply disconnection relay unit 2 through the signal line 24, and the contact 2a is opened / closed to control the power supply ON / OFF and to the open / close switching relay units 7 and 8. Signal line 2
An electric signal is sent via 5, 26 to control the direction of the current flowing in the motors 9, 10.

FIG. 3 shows a block diagram of the electronic control circuit 19, which comprises a microcomputer 27, an input port 31, an output port 32 and the like. The well-known microcomputer 27 is basically composed of a CPU 28, a RAM 29 and a ROM 30. A program for controlling the CPU 28 is written in the ROM 30, and the CPU 28 performs arithmetic processing while fetching external data required from the input port 31 or exchanging data with the RAM 29 according to this program. Then, the data processed as needed is output to the output port 32. The output port 32 is composed of a latch circuit, receives an output port designation signal from the CPU 28 given to the output port 32 via the signal line 34, temporarily stores the data in the port, and outputs the direct current. Electric signals are output to the voltage sources 5 and 6, the power supply disconnection relay unit 2, and the open / close switching relay units 7 and 8.

The electronic control circuit 19, the DC voltage sources 5 and 6, the open / close switching relay units 7 and 8 constitute opening / closing control means, and the monostable multi-circuits 15 and 16 and the electronic control circuit 19 etc. automatically stop the curtain. It constitutes the circuit.

The flowchart of the program written in the ROM 30 is as shown in FIGS. 4 (a) and 4 (b).
The operation of the electric curtain drive device will be described below with reference to FIG.
A description will be given according to (b).

First, when the program starts, input port
The outputs of the monostable multi-circuits 15 and 16 are read via 31 (step 1), and if the output of the monostable multi-circuit 15 is H, it is determined whether the output of the monostable multi-circuit 16 is H (step 2). . If the output of the monostable multi-circuit 15 is L, the counter A is reset (step 3) and it is determined whether the output of the monostable multi-circuit 16 is H (step 4). If the output of the monostable multi-circuit 16 is H, the counter
A and B are added (step 6), and if the output of the monostable multi-circuit 16 is L, the counter B is reset in step 5 and then the counters A and B are added (step 6).

Next, it is determined whether the counter A overflows (step 7), and if NO, it is determined whether the counter B overflows (step 11). If YES, 1 is stored in the motor 9 operation register (step 8), and it is determined whether the motor 10 operation register is 1 (step 9). If YES, an electric signal is supplied to the power supply disconnecting relay unit 2 via the output port 32 to cut off the power supply (step 27), and if NO, an electric signal is supplied to the DC voltage source 5 via the output port 32, After the supply of the DC voltage to the motor 9 is stopped (step 10), it is determined in step 11 whether the counter B overflows.

If NO in this step 11, the switch input is taken in from the input switch 20 via the input port 31 (step 15). If YES, 1 is stored in the motor 10 operation register (step 12), and it is determined whether the motor 9 operation register is 1 (step 13). If YES, relay unit 2 for disconnecting the electric signal from the output port 32
To turn off the power (step 27), and if NO, give an electric signal to the DC voltage source 6 via the output port 32 and stop the supply of the DC voltage to the motor 10 (step 1).
4), take in the switch input from the input switch 20 via the input port 31 (step 15). Counter A, B
The set value of is set to a value that does not overflow even at the output pulse interval of the monostable multi-circuit 15 when the curtain is operating at the minimum speed.

In step 16, it is determined whether it is a curtain opening command, and if NO, it is determined whether it is a curtain closing command (step 21).
If YES, 0 is stored in the operation registers of the motors 9 and 10 (step 17), and the counters A and B are reset (step 1)
8). Next, an electrical signal is applied to the switching switching relay units 7 and 8 via the output port 32 and the signal lines 25 and 26 to switch the switching so that current flows in the motors 9 and 10 in the 9a and 10a directions. Switch the contacts of relay units 7 and 8 (Step 1
9) Next, an electrical signal is applied to the power disconnection relay unit 2 via the output port 32 and the signal line 24 to close the contacts, and the DC voltage sources 5 and 6 supply DC voltage to the motors 9 and 10. Operate the curtain in the opening direction (step 20) and return to step 1.

If it is not a curtain opening command, it is judged in step 21 whether it is a curtain closing command, and if NO, it is judged whether it is a curtain stop command (step 26). If YES, 0 is stored in the operation registers of the motors 9 and 10 (step 22), and the counter A,
Reset B (step 23). Next, an electric signal is applied to the open / close switching relay units 7 and 8 via the output port 32 and the signal lines 25 and 26, and 9a and 10a are applied to the motors 9 and 10, respectively.
The contacts of the switching switching relay units 7 and 8 are switched so that a current flows in the opposite direction (step 24), and then an electrical signal is sent to the power disconnection relay unit 2 via the output port 32 and the signal line 24. DC voltage source 5,
6 supplies a DC voltage to the motors 9 and 10 to operate the curtain in the closing direction (step 25), and returns to step 1.

If it is not a curtain closing command, it is judged whether it is a curtain stop command (step 26), and if NO, the process returns to step 1.
If YES, an electric signal is given to the power disconnection relay unit 2 through the output port 32 and the signal line 24 to open the contact, and the DC voltage sources 5 and 6 reduce the voltage across the capacitor 4, so that the motor 9 and The DC voltage supply to 10 is stopped to stop the curtain (step 27), and the process returns to step 1.

FIG. 5 shows the waveform of each part when two curtains are actually driven. In the figure, 35 is a curtain rail in which the motor 9 is incorporated, and 36 is a curtain rail in which the motor 10 is incorporated. A is the coil current of the motor 9, B is the coil current of the motor 10, C is the voltage waveform of the signal line 11, D is the voltage waveform of the signal line 12, E is the voltage waveform of the signal line 24, and F is the voltage waveform of the capacitor 4. It is the voltage at both ends. When the voltage of the signal line 11 is 0V, the DC voltage source 5 stops the voltage supply to the motor 9,
It is assumed that when the voltage of 12 is 0V, the DC voltage source 6 stops the supply of voltage to the motor 10, and when the voltage of the signal line 24 is 0V, the contact 2a of the power disconnecting relay unit 2 is opened.

FIG. 5 (a) shows a state in which both curtains are operating, the voltage of each signal line 11, 12, 24 is 5V, that is, the H level, and power is supplied to the motors 9, 10. In the illustrated example, the curtain is driven in the closing direction. In FIG. 5 (b), the curtain of the curtain rail 35 reaches the curtain rail end, the voltage of the signal line 11 changes to 0V, the power source from the DC voltage source 5 is cut off, and the current of the motor 9 becomes 0A. Becomes Also,
The curtain rail 36 is driven by the output signal from the encoder 14 from the DC voltage source 6 to the motor 10 via the electronic control circuit 19 to drive the curtain in the closing direction. Then, as shown in FIG. 5 (c),
When both curtains reach the curtain rail ends, the outputs from the encoders 13 and 14 will not change, so the electronic control circuit 19 detects this condition and sets the signal line 24 to 0V to turn off the power. The contact 2a of 2 is controlled to open. Therefore, the voltage across the capacitor 4 changes to 0V, and the coil currents of the motors 9 and 10 become 0A.

[Effects of the Invention] As described above, the present invention provides a speed detection unit that outputs a signal proportional to the speed of the curtain and a motor coil current to the motor when only one of the curtains is stopped by the output from the speed detection unit. Since it is equipped with a curtain automatic stop circuit that cuts off and powers off the entire circuit when both curtains stop, the motor coil current to the motor is cut off when only one curtain stops, and both curtains stop. Since the power supply to the entire circuit is cut off when the motor stops, the period during which the motor lock current flows is shortened, and as a result, the heat generation of the drive device such as the motor coil and the opening / closing control means is reduced, resulting in high efficiency. It has the effect of becoming.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention,
2 is an operation waveform diagram of the above, FIG. 3 is a block diagram showing a configuration of the electronic control circuit of the above, FIGS. 4 (a) and 4 (b) are flow charts showing the operation of the electronic control circuit of the same, and FIG.
The figure is a diagram for explaining the operation of the above. 9 and 10 are motors and 35 and 36 are curtain rails.

Claims (1)

[Claims] 1. A motor for driving two curtains to open and close, and a motor that is incorporated in each curtain rail and is in a forced stop state with power being applied when the curtains are completely opened or closed, and power is supplied to both motors. In addition, in an electric curtain drive device having an opening / closing control means for controlling opening / closing / stopping of the curtain by a switch operation, a speed detecting means for outputting a signal proportional to the speed of the curtain and an output from the speed detecting means. Thus, an electric curtain drive device is provided with a curtain automatic stop circuit that cuts off the motor coil current to the motor when only one of the curtains stops and cuts off the power supply of the entire circuit when both curtains stop.