JP2003061375A - Voltage change detection structure of switchgear for building - Google Patents

Abstract

(57) [Problem] To detect an obstacle in an electric switch for a building based on a voltage change of a switch so as to prevent erroneous detection. A similar voltage circuit (13) connected to a switch (5).
a a first output line L1 and a reference voltage circuit 13 which branches from the similar voltage and outputs a predetermined constant voltage
b and the second output line L2 from the comparator circuit 1
3c, and the output terminal of the comparator CT receives an integrating circuit 13d and a detection signal output circuit 13e.
And an obstacle detection signal is output based on the duty ratio of the output from the comparator output terminal being 1: 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a voltage change detection structure for a building switch that is provided such that it can be opened and closed such as an opening of a building.

[0002]

2. Description of the Related Art Generally, in an electric opening / closing machine for this type of construction, for example, in the case of a building shutter device, a shutter curtain moves up and down based on forward / reverse driving of the opening / closing machine, thereby opening / closing the opening. It is set to open and close. In such a case, when there is an obstacle in the opening, the shutter curtain that operates to close will pinch the obstacle, so that an obstacle detection signal is output when the shutter curtain that operates to close hits an obstacle. On the other hand, when the obstacle detection signal is output, the switch is urgently stopped, and then the obstacle avoidance operation such as open driving for a predetermined time (emergency stop and reverse rising operation) is performed. The switch is driven and controlled so that it can be carried out. When the switch is composed of, for example, an asynchronous single-phase motor, the contact voltage of the shutter curtain with the obstacle changes the terminal voltage of the phase-shifting capacitor provided in the switch. It has been proposed that the detection of the voltage change of 1 is regarded as the obstacle detection, and the obstacle detection signal is output to the switch. As such a type, there is one that detects a similar voltage circuit connected to a phase shift capacitor and a reference voltage circuit branched from the similar voltage circuit and smoothed to a constant voltage based on comparison by a comparator. , In this case, the similar voltage circuit is connected to the first input terminal of the comparator and the reference voltage circuit is connected to the second input terminal, and the voltage value of the similar voltage circuit changes with the voltage value of the reference voltage circuit. Is detected by the comparator,
It is set to output an obstacle detection signal.

[0003]

However, in the case of detecting an obstacle based on the detection of the voltage change of the phase shift capacitor, the voltage output from the similar voltage circuit is an alternating current as shown in FIG. Since the voltage is converted to a DC voltage, there is a ripple due to the ripple, but the voltage output from the reference voltage circuit becomes a voltage that is a smoothed version of the output of the similar voltage circuit. There is. Therefore, when the terminal voltage of the phase-shifting capacitor drops, the comparator immediately detects this when the lower voltage value of the triangular wave of the similar voltage circuit falls below the voltage value of the reference voltage circuit, and detects the obstacle detection signal. Is output (at the time of arrow X in FIG. 5), and there is a problem that the obstacle detection signal is output even in the case of a momentary voltage change, for example. In this case, in the case where the reference voltage circuit is branched from the similar voltage circuit, the voltage value of the reference voltage circuit also gradually decreases, so that the output of the obstacle detection signal is slightly delayed from the time point of the arrow X. But
In any case, it will react to a slight voltage change, so concretely, it seems that strong wind or heavy rain is blowing on the shutter curtain, or that there is a load on the switch as a mechanical characteristic. Even in such a case, the obstacle detection signal is output, and there is a problem to be solved by the present invention. Furthermore, in the process of closing the shutter curtain from the fully open state, obstacle detection may not be performed when the shutter curtain is close to the fully opened state.Therefore, in the vicinity of the fully opened state of the shutter curtain, an obstacle with high detection sensitivity may be detected. Although detection is preferable, if the detection sensitivity is increased in this way, there is a problem that the above-mentioned malfunctions will increase, and there are problems to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and it is a voltage of a switch which constitutes an electric switch for construction. In detecting a change, a similar voltage circuit connected to the switch and a reference voltage circuit that outputs a preset constant voltage based on comparison by a comparator, a similar voltage circuit at the first input terminal of the comparator, The reference voltage circuit is connected to the second input terminal, while the detection signal output circuit is connected to the comparator output terminal via the integrating circuit, and the voltage is based on the output from the comparator output terminal having the preset duty ratio. It is configured such that a change detection signal is output. By doing so, it is possible to prevent erroneous detection in which an instantaneous load acts on the shutter curtain to detect an obstacle. In this configuration, the voltage value of the similar voltage circuit of the present invention can be switched between large and small, and the detection sensitivity of the voltage change can be set so that the detection sensitivity is high. Obstacles can be detected without malfunction. Further, in this configuration, the voltage change detection signal may be output when the duty ratio of the output from the comparator output terminal of the present invention becomes 1: 1.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
~ It demonstrates based on the drawing of FIG. In the drawings, reference numeral 1 denotes a shutter curtain of a shutter device that opens and closes an opening, and the shutter curtain 1 is wound around a winding drum 3 installed in a shutter case 2 provided above the body. The winding drum 3 has a switch 5 equipped with an asynchronous single-phase type electric motor 4 and is connected to the switch 5 in an interlocking manner. With the forward / reverse drive (open / close drive) of the switch 5, the winding drum 3 is wound. 3 rotates in the forward and reverse directions, whereby the shutter curtain 1 is unwound from the winding drum 3 and wound up to open and close between the fully closed posture in which the opening is closed and the fully opened posture in which the opening is opened. Although configured to operate, all of these configurations are conventional. Reference numeral 6 denotes guide rails provided upright on the left and right sides of the opening, and the shutter curtain 1 is set to open and close the opening while being guided by the guide rails 6 on the left and right sides. .

Reference numeral 7 denotes an operation tool provided on the side of the opening. The operation tool 7 is provided with an opening operation switch PBU, a stop operation switch PBS, and a closing operation switch PBD. These operation switches PBU, PBS,
Each wiring of the PBD is arranged above the frame and is input (connected) to a control device (control panel) 8 for driving and controlling the switch 5. And each operation switch PBU, PBS, P
Based on the output of the operation signal in response to the push operation of BD,
The control device 8 outputs an opening drive command, a drive stop command, and a closing drive command to the switchgear 5, whereby the switchgear 5 is opened.
Are set to open and close the shutter curtain 1 by performing corresponding opening drive, stopping drive and closing drive.

The electric motor 4 constituting the switch 5 is
Forward and reverse rotation drive is performed based on power supply from a household AC power supply PS, and for example, a forward rotation winding (closing winding) 4a for closing driving and a reverse rotation winding (for closing driving) ( (Opening winding) 4b, and a phase-shifting capacitor 9 that is connected in series with the closing winding 4a and the opening winding 4b and that generates a rotating magnetic field that determines the rotating direction of the electric motor 4. ing. Further, a fully closed detection switch 10 is connected to the wiring of the closing winding 4a so that the shutter curtain 1 is turned off when the shutter curtain 1 is in the fully closed posture to stop the drive of the opening / closing device 5 (electric motor 4). Meanwhile,
A full-open detection switch 11 that is turned off when the shutter curtain 1 is in the fully open position to stop driving the switch 5 is connected to the wiring of the opening winding 4b. It is configured to detect whether the shutter curtain 1 is fully closed or fully opened.

The controller 8 is provided with a switch drive circuit 12 for outputting a corresponding command to the switch 5 based on an operation signal from the operating tool 7, and a phase shift capacitor 9 associated with obstacle detection. The circuit necessary for opening / closing control of the shutter curtain 1, such as the voltage change detection circuit 13 for detecting the voltage change of the above and outputting the obstacle detection signal, is connected by wiring. Then, the switch drive circuit 12 controls each operation switch P
Based on the push operation of the BU, PBS, PBD, the corresponding opening or closing relay switch is turned on, and thereby the opening and closing circuits connected to the relay switch are appropriately closed. It is configured.

On the other hand, the voltage change detection circuit 13 passes the terminal voltage from the phase shift capacitor 9 arranged in the electric motor 4 through the transformer TR, the rectifying bridge D1, the first capacitor C1, the resistor, etc. Is connected to the similar voltage circuit 13a and the reference voltage circuit 13b so as to branch to the similar voltage circuit 13a and the reference voltage circuit 13b. The similar voltage circuit 13a has a first series connection,
A first shunt regulator IC1 connected in parallel with the second and third resistors R1, R2, R3, and a fourth resistor R connected in series with the first to third resistors R1, R2, R3.
4, a second capacitor C connected in parallel with the fourth resistor R4
And a first shunt regulator IC1
Is configured to be output from the first output line L1 in a state of being held by the fourth resistor R4 and the second capacitor C2, which is output from the first output line L1. , A voltage similar to the terminal voltage from the phase shift capacitor 9 is output.

In the present embodiment, the electronic switch TS formed by using a FET (field effect transistor) is connected in parallel to the second resistor R2 of the similar voltage circuit 13a. As a result, in a state where the electronic switch TS is turned on, only the first and third resistors R1, R3 among the first, second and third resistors R1, R2, R3 connected in series are the first. It is set so as to act on one shunt regulator IC1, so that when the electronic switch TS is in the ON state, the voltage output from the first output line L1 becomes a similar voltage smaller than the terminal voltage of the electric motor 4. Is set to.

On the other hand, the electronic switch TS is OF
In the F operating state, the first, second and third resistors R1,
All of R2 and R3 are set to act on the first shunt regulator IC1.
The voltage output from the first output line L1 is set to be a similar voltage larger than the small similar voltage, and thus the electronic switch TS is turned on and off.
Depending on the switching, the similar voltage circuit 13a (first output line L
The output from 1) can be switched between large and small.

On the other hand, the reference voltage circuit 13b has a fifth,
The sixth and seventh resistors R5, R6, R7 and these resistors R5,
A second shunt regulator IC2 connected in parallel to R6 and R7, and the fifth to seventh resistors R5, R6 and R7.
An eighth resistor R8 connected in series to the eighth resistor R8, ninth and tenth resistors R9 and R10 connected in parallel to the eighth resistor R8, and serially connected to the ninth resistor R9 in parallel to the eighth resistor R8. The third capacitor C3, the first diode DD1 connected in series with the ninth resistor R9, and the second diode DD2 connected in parallel, and the voltage output from the second shunt regulator IC2 is Eight to ten resistors R8, R9, R10 and a third capacitor are configured to output from the second output line L2 in a state of being held, whereby the second output line L2 is connected to the terminal from the phase shift capacitor 9. It is less affected by changes in voltage, is smoothed, and is configured to output a preset reference voltage. Here, the reference voltage is set to a value that is lower than the small similar voltage while the electric motor 4 is being driven, but higher than the similar voltage when a load acts on the electric motor 4.

Further, in the comparator circuit 13c, the first output line L1 of the similar voltage circuit 13a is connected to the + side input terminal (corresponding to the first input terminal of the present invention), and
The second output line L2 of the reference voltage circuit 13b is connected to the side input terminal (corresponding to the second input terminal of the present invention), and the comparator C compares the outputs of these lines L1 and L2.
T and an eleventh resistor R11 connected between the + input terminal and the output terminal of the comparator CT. The comparator CT is set to output from the comparator output terminal when it is determined that the output from the first output line L1 is larger than the output from the second output line L2. by this,
The terminal voltage of the phase shift capacitor 9 is high (electric motor 4
In the normal driving state (1), an output is made from the output terminal of the comparator CT, but a load acts on the electric motor 4,
That is, in a state in which the shutter curtain 1 comes into contact with an obstacle (obstacle detection state), the rotation of the electric motor 4 slows down, and the terminal voltage of the phase shift capacitor 9 drops, the output from the similar voltage circuit 13a becomes a reference. It is set so that it is lower than the output from the voltage circuit 13b and the output from the comparator circuit 13c disappears. At this time, the output from the comparator output terminal is a triangular wave, and as shown in FIG. 5, the output is set to disappear when the triangular wave gradually decreases.

By the way, in the case of detecting a voltage change (detection of an obstacle), the detection sensitivity (detection sensitivity) is set smaller when the voltage of the similar voltage circuit 13a is set larger. The detection sensitivity is high, and the obstacle detection signal can be output in response to a small terminal voltage change. Then, the voltage from the similar voltage circuit 13a turns ON / OFF the electronic switch TS as described above.
Since it is possible to switch between large and small by switching, the detection sensitivity of voltage change (obstacle detection, load detection) becomes a similar voltage when the electronic switch TS is in the ON state and the output from the similar voltage circuit 13a is small. When the voltage is output as a similar voltage, the voltage change is detected based on the high sensitivity detection mode in which the detection sensitivity is increased, the electronic switch TS is turned off, and the output from the similar voltage circuit 13a is output as a large similar voltage. In this case, the voltage change is set to be detected based on the normal detection mode that provides normal detection sensitivity. Therefore, the voltage change detection circuit 13 can switch to either the high sensitivity mode or the normal detection mode according to the switching state of the electronic switch TS, and performs the voltage change detection based on the switched mode. However, in any case, when there is a voltage change in the phase shift capacitor 9, the triangular wave output from the comparator output terminal is set to gradually disappear.

The voltage change detection circuit 13 is connected to the output terminal of the comparator CT, and the integration circuit 1
3d, and a detection signal output circuit 13e that outputs an obstacle detection signal based on the output from the integration circuit 13d is connected, and the detection signal output circuit 13e is connected to the open / close drive circuit 12. That is, the output terminal of the comparator CT is connected to the integrating circuit 13d including the twelfth resistor R12 and the fourth capacitor C4. Further, a predetermined voltage (5 V in the present embodiment) is applied to the integrating circuit 13d via the thirteenth resistor R13 between the twelfth resistor R12 and the fourth capacitor C4, and the output of the comparator CT is output. The output from the terminal is set to be output from the third output line L3 in a state of 0 to the predetermined voltage value (5 V in the present embodiment). Here, the output on the third output line L3 is the integration circuit 13
The triangle wave is smoothed by passing through d,
The voltage in this state is set to be input to the detection signal output circuit 13e. Then, the detection signal output circuit 13
e is composed of an inverter circuit having a preset threshold value, and outputs a voltage change detection signal, that is, an obstacle detection signal when the input from the third output line L3 falls below the threshold value. Is set to. At this time, the detection signal output circuit 13e of the present embodiment has the threshold value set to 2.5 V, and the twelfth and thirteenth resistors R1.
The capacitances of 2, R13 and the fourth capacitor C4 are set to 2.5 V when the duty ratio of the output from the comparator output terminal is 1: 1. by this,
As shown by the arrow Y in FIG. 5, the obstacle detection signal is output from the inverter at an intermediate time point until the voltage change from the similar voltage circuit 13a ends, that is, at the center of the peak and valley of the ripple. Output), and the output from the comparator CT is set to be averaged in this way.

On the other hand, the fully closed and fully open detection switch 10,
Reference numeral 11 is incorporated in each of the fully closed and fully opened detection circuits (not shown), and is set so as to output the fully closed and fully opened detection signals based on the switching of the fully closed and fully opened detection switches 10 and 11. There is. Then, in the present embodiment, the electronic switch TS of the similar voltage circuit 13a is set to be turned on (high sensitivity detection mode) in response to the input of the fully open detection signal, and in this state, the closing signal from the operation tool 7 is set. Is input, the closing operation accompanied by the voltage change detection (obstacle detection) in the high sensitivity detection mode is set. Further, the control device 8 is provided with a switching means for switching the electronic switch TS to the OFF state when the shutter curtain 1 reaches a preset open position, but in the present embodiment, the switching means is provided. The timer device 14 is used as a device, and is set to switch the electronic switch TS to the OFF state after a lapse of a predetermined time from the input of the closing signal, and thereafter, the voltage change detection in the normal detection mode is involved. It is set to perform the closing operation. As described above, the control device 8 controls the switchgear 5 in response to the input of each signal based on the operation tool 7, the obstacle detection signal based on the phase shift capacitor 9, and the respective signals based on the fully closed and fully open detection switches 10 and 11. , The corresponding commands are output, and the opening / closing control of the shutter curtain 1 is performed by this.

In the embodiment of the present invention configured as described above, the shutter curtain 1 opens and closes the opening portion in accordance with the opening and closing drive of the opening and closing device 5 which is driven based on the drive command from the control device 8. In this configuration, in detecting the presence of an obstacle at the opening in the process of closing the shutter curtain 1, the voltage change of the phase shift capacitor 9 is detected by the similar voltage circuit 13a connected to the phase shift capacitor 9.
The reference voltage circuit 13b and the reference voltage circuit 13b are compared and detected by the comparator circuit 13c. In this case, the integrating circuit 13d is connected between the comparator circuit 13c and the detection signal output circuit 13e which outputs the obstacle detection signal. Therefore, the detection signal of the voltage change is output in the state where the duty ratio of the output from the comparator circuit 13c (comparator output terminal) is 1: 1. As a result, unlike the conventional case, the detection signal is not output due to the instantaneous voltage change, and the stability and
Obstacles can be detected reliably and without malfunction.

Moreover, in the present embodiment,
In detecting the voltage change, the voltage change can be detected in two kinds of modes, which are a high-sensitivity detection mode and a normal detection mode, and the shutter curtain 1 is in an open state close to a fully opened posture, and the shutter curtain 1 is unwound. Even if the amount of the shutter curtain 1 is small and the load of the shutter curtain 1 due to the contact of the shutter curtain 1 with the obstacle does not easily act on the opening / closing device 5, it is possible to reliably detect the obstacle. It is the one. Even in the case of this high sensitivity detection mode, the comparator circuit 13
The output from c is output as an obstacle detection signal through the integrating circuit 13d. As a result, obstacle detection can be reliably performed even in the closed state from full open, which is difficult to detect, and instantaneously. It is possible to eliminate erroneous output of the obstacle detection signal due to various voltage changes, and to perform stable obstacle detection.

As described above, in the embodiment of the present invention, the voltage change of the phase shift capacitor 9 based on the obstacle detection can be surely detected, but the twelfth and thirteenth resistances of the integrating circuit 13d can be detected. By setting the resistance values of R12 and R13 and the capacitance of the fourth capacitor C4, the duty ratio of the output from the output terminal of the comparator CT can be freely set, and suitable obstacle detection suitable for the detection conditions and the like can be performed. It can be carried out.

Of course, the present invention is not limited to the above-described embodiment, and the reference voltage circuit does not branch from the similar voltage circuit as in the above-described embodiment, but has a similar voltage circuit. It can be separately provided, and the output state of each circuit in this case is shown in FIG.

[Brief description of drawings]

FIG. 1 is a schematic front view of a shutter device.

FIG. 2 is a circuit diagram illustrating a part of a voltage change detection circuit.

FIG. 3 is a circuit diagram illustrating a part of a voltage change detection circuit.

FIG. 4 is a block diagram illustrating a control state by a control device.

FIG. 5 is a timing chart illustrating an output state of each circuit of the voltage change detection circuit.

[Explanation of symbols]

1 shutter curtain 4 electric motor 4a Winding wire for closing 5 switch 6 Guide rail 7 controls 8 control device 9 Phase shift capacitors 10 Fully closed detection switch 11 Fully open detection switch 12 Switch drive circuit 13 Voltage change detection circuit 13a Similar voltage circuit 13b Reference voltage circuit 13c comparator circuit 13d integrating circuit 13e Detection signal output circuit 14 Timer device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yuichi Hatakeyama             2-1, 1-1 Nishishinjuku, Shinjuku-ku, Tokyo Sanwa             Inside Shatter Industry Co., Ltd. (72) Inventor Takeshi Watanabe             3-23-3 Shin-Yokohama, Kohoku Ward, Yokohama City, Kanagawa Prefecture             Issue Shin-Yokohama Tobu AK Building Somfy Stock Association             In-house F-term (reference) 2E042 AA01 CA01 CB06 CC02 CC06                       DA01                 5H530 AA12 BB17 CC01 CC10 CD03                       CD34 CD36 DD19 EF03                 5H570 AA22 BB09 CC01 DD06 EE01                       GG04 JJ18 LL03 LL32

Claims (3)

[Claims] 1. A voltage change of a switch constituting an electric switch for construction is based on a comparison between a similar voltage circuit connected to the switch and a reference voltage circuit outputting a preset constant voltage by a comparator. For detection, connect a similar voltage circuit to the first input terminal of the comparator, connect a reference voltage circuit to the second input terminal, and connect the detection signal output circuit to the comparator output terminal via the integration circuit Change detection structure for a building switch, which is configured to output a voltage change detection signal based on an output from the switch having a preset duty ratio. 2. The voltage change detection structure for a building switch according to claim 1, wherein the voltage value of the similar voltage circuit is switchable between large and small, and the voltage change detection sensitivity is set to be switched. 3. The voltage change of a building switch according to claim 1, wherein the detection signal of the voltage change is output when the duty ratio of the output from the comparator output terminal becomes 1: 1. Detection structure.