JPH11196595A - Motor-driven switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safeness of the vertical movement of a motor-driven switchgear. SOLUTION: A microcomputer which controls a motor-driven switchgear judges whether an abnormality such as a short-circuit state, an open-circuit state, etc., exists in an electromagnetic brake or not before a vertical movement is practiced (80 and 84) when it receives a vertical driving command and, if the abnormality exists, makes the electromagnetic brake operate (88) and displays the failure (90). If the abnormaility does not exist, the microcomputer releases the electromagnetic brake (82) and practices a normal vertical movement (86). During the vertical movement (86) or during a resting state, the microcomputer monitors the electromagnetic brake is monitored and, if an abnormality is detected, stops the vertical movement and displays the failure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for raising and lowering a vertically movable member, such as an electric roll screen or an electrically driven Roman shade, and more particularly, to an electrically movable device capable of safely performing a vertically moving operation of the vertically movable member. About.

[0002]

2. Description of the Related Art FIG. 12 shows a control system of an electromagnetic brake of an electric roll screen device which is an example of a conventional electric opening / closing device. Referring to FIG. 12, this control circuit includes a microcomputer 220 for executing a program for controlling the electromagnetic brake BK, and a microcomputer 220
And includes resistors R2 and R3 for controlling the brake BK, a transistor Q1, and a diode D1. The solenoid drive circuit receives an output from the output port 222 and operates by an electromagnetic action.

[0003] One terminal of a resistor R2 is connected to an output port 222. The other terminal of the resistor R2 is a transistor Q
1 base. The emitter of transistor Q1 is connected to ground potential. The resistor R3 is connected between the base and the emitter of the transistor Q1.
The collector of the transistor Q1 is connected to one terminal of a brake BK composed of a solenoid drive circuit. The other terminal of the brake BK is connected to the power supply potential V +. Further, a diode D1 is connected in parallel with the brake BK in a direction from the transistor Q1 to the power supply potential V +. The electromagnetic brake shown in FIG. 12 is a DC electromagnetic brake.

FIG. 13 shows a control circuit in the case of an AC electromagnetic brake. Referring to FIG. 13, this control circuit includes a microcomputer 220 and a microcomputer 220
R1, R2, R4, R5 and R6 forming a drive circuit for controlling the brake BK based on the control signal output from the output port 222 of the transistor Q
1, a three-terminal bidirectional thyristor (trade name: TRIAC) T1, a photocoupler PC1, and a capacitor C1
, A varistor V1, and a diode D1.

[0005] The resistor Q1 is connected between the output port 222 and the base of the transistor Q1. The resistor R2 is connected between the base of the transistor Q1 and the ground potential. The emitter of transistor Q1 is connected to ground potential. The collector of transistor Q1 is connected to power supply potential Vcc via photocoupler PC1 and resistor R4. One terminal of triac T1 is brake BK
The other terminals are connected to an AC power supply Vac. The contact point between the brake BK and the triac T1 is connected to the photocoupler PC1, and the other terminal of the photocoupler PC1 is connected to the control electrode of the triac T1. A resistor R5 is connected between the control electrode of the triac T1 and the AC power supply Vac. Further Triac T1
In parallel, a capacitor C1 and a resistor R6 are connected, and a varistor V1 is also connected in parallel. The diode D1 is connected in parallel with the brake BK and from the triac T1 toward the AC power supply Vac. The other terminal of the brake BK is connected to an AC power supply Vac.

[0006] Regardless of the case of the DC electromagnetic brake shown in FIG. 12 or the case of the AC electromagnetic brake shown in FIG. 13, the solenoid drive circuit essentially drives the brake BK by electromagnetic action. Therefore, the control of the electromagnetic brake is merely performed based on a command given from the microcomputer 220 as to whether or not to energize the solenoid.

[0007]

In the case where the energization of the solenoid is simply turned on / off based on a command from the microcomputer 220, there are the following problems.

(1) In an electric roll screen,
If the electromagnetic brake is broken, the roll screen may fall due to gravity. In this case, the falling roll screen collides with a person or an object, which is dangerous.

(2) If the electromagnetic brake breaks down, the roll screen may stop halfway, in which case it may not be possible to repair or remove the roll screen.

(3) If the electromagnetic brake fails during the elevating operation, there is a possibility that the roll screen cannot be stopped at an appropriate position.

(4) There is a system that can remotely control the electric roll screen. However, if the electromagnetic brake breaks down, it is dangerous to operate the electric roll screen from a position where it cannot be visually recognized.

Such a problem is not limited to the electric roll screen, but is generally common to an electric open / close device that generally raises / lowers an elevating opening / closing member such as a roll screen.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electric opening / closing device capable of safely performing an elevating operation of an electromagnetic brake of an elevating opening / closing member.

Another object of the present invention is to provide an electric switchgear in which even if the electromagnetic brake breaks down, the lifting opening / closing member does not fall and harm the surroundings.

Still another object of the present invention is to provide an electric switchgear that does not hinder inspection, repair, removal, etc., even if a failure occurs in the electromagnetic brake.

Another object of the present invention is to provide a motor-operated switchgear that can be remotely operated, in which remote operation cannot be performed from a position where the elevating opening / closing member cannot be visually recognized, while operation from a position where the switchgear can be visually recognized for repair. The present invention is to provide an electric opening / closing device capable of operating according to the following.

[0017]

According to a first aspect of the present invention, there is provided an electric opening / closing device, a lifting / lowering member, a motor with an electromagnetic brake for raising / lowering the lifting / lowering member, and a response to a remote control signal. Control means for controlling the electric motor.
The electromagnetic brake always fixes the elevating opening / closing member, and releases the brake when an electric current is applied. The control means
Prior to starting the electric motor in response to the remote control signal to move the elevating opening / closing member up and down, it includes a checking means for detecting whether or not the electromagnetic brake is normal and performing the elevating operation when the electromagnetic brake is normal.

Prior to raising or lowering the electric opening / closing member, if it is found that the electromagnetic brake is out of order, the lifting operation is not performed. Therefore, occurrence of danger due to the failure of the electromagnetic brake can be prevented.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, in addition to the configuration of the first aspect, the confirmation means is also provided when the elevating opening / closing member is moving up and down by operating the motor. Then, it is monitored whether the electromagnetic brake is normal or not, and if an abnormality is found, the elevating operation is stopped.

According to the invention described in claim 2, according to claim 1,
In addition to the functions and effects of the invention described in (1), even if the elevating operation is started once, if a failure of the electromagnetic brake is detected during the elevating operation, the elevating operation is automatically stopped. It is possible to prevent the danger when the elevating operation is continued even when a failure occurs.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the electromagnetic brake is a DC electromagnetic brake. The confirmation means includes a means for confirming that neither the short-circuit state nor the open state of the DC electromagnetic brake has occurred based on the DC voltage value applied to the DC electromagnetic brake.

According to a fourth aspect of the present invention, in addition to the configuration of the first or second aspect, the electromagnetic brake is a DC electromagnetic brake. The confirmation means includes a means for confirming that neither the short-circuit state nor the open state of the DC electromagnetic brake has occurred based on the DC current value passing through the DC electromagnetic brake.

According to a fifth aspect of the present invention, in addition to the configuration of the first or second aspect, the electromagnetic brake is an AC electromagnetic brake. The checking means predicts a current value flowing through the AC electromagnetic brake from a current flowing in parallel with the AC electromagnetic brake, and based on the predicted current value, neither a short circuit state nor an open state of the AC electromagnetic brake has occurred. Including means for confirming.

According to a sixth aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, the electromagnetic brake is an AC electromagnetic brake. The confirmation means includes a means for confirming that neither the short-circuit state nor the open state of the AC electromagnetic brake has occurred based on the current value flowing through the AC electromagnetic brake.

In this way, whether the electromagnetic brake is of the DC type or of the AC type can be properly checked for the occurrence of a failure.

According to a seventh aspect of the present invention, there is provided an electric opening / closing device, wherein the lifting / lowering opening / closing member, an electric motor with an electromagnetic brake for raising / lowering the lifting / lowering opening / closing member, and an open state detecting means for detecting an open state of the electromagnetic brake. And control means for controlling the electric motor in response to the remote control signal. The electromagnetic brake always fixes the elevating opening / closing member, and releases the brake when an electric current is applied. The control means terminates the elevating drive operation when the open state detecting means detects that the electromagnetic brake is in the open state during the elevating operation of the elevating opening / closing member.

According to the present invention, when a failure of the electromagnetic brake is detected during the elevating operation of the elevating opening / closing member, the elevating operation is automatically stopped. It is possible to prevent the danger when the elevating operation is continued even when a failure occurs.

According to an eighth aspect of the present invention, there is provided an electric opening / closing device, comprising: an elevating opening / closing member; an electric motor having an electromagnetic brake for elevating the elevating opening / closing member; and a movement detecting means for detecting a moving amount of the elevating opening / closing member. And control means for controlling the electric motor in response to the remote control signal. The electromagnetic brake always fixes the lifting / lowering member, and releases the brake by applying electric current.The control means responds to the detection of the movement of the lifting / lowering member by the movement detecting means in the stop mode of the lifting / lowering member. Then, an operation is performed for forcibly lowering the elevating opening / closing member at a predetermined low speed within the range of the movement amount detected by the movement detecting means.

If it is detected that the electromagnetic brake breaks down for some reason and the elevating member is moved (falls), the elevating member is lowered at a low speed.
For this reason, the increase in the descending speed of the elevating opening / closing member is reduced by the back electromotive force of the motor, and the danger of the elevating opening / closing member hitting a person or an object at a high speed can be reduced.

According to a ninth aspect of the present invention, there is provided an electric opening / closing device, comprising: an elevating opening / closing member, an electric motor with an electromagnetic brake for elevating the elevating opening / closing member, and control means for controlling the electric motor in response to a remote control signal. including. The electromagnetic brake always fixes the elevating opening / closing member, and releases the brake when an electric current is applied. The control means performs an operation for forcibly lowering the elevating opening / closing member to the lowest position in response to the detection of the movement of the elevating opening / closing member in the stop mode of the elevating opening / closing member.

When the elevating opening / closing member moves (falls), the elevating opening / closing member is forcibly lowered to the lowest position. Can be prevented from harming.

According to a tenth aspect of the present invention, there is provided an electric opening / closing device, a lifting / lowering member, a motor with an electromagnetic brake for raising / lowering the lifting / lowering member, and control means for controlling the motor in response to a remote control signal. And The control means
Means for detecting a failure state of the electromagnetic brake, inhibition means for inhibiting operation of the motor in response to detection of the failure state by the failure state detection means, and inhibition of operation of the motor by the inhibition means Thereafter, a means for driving the electric motor in response to only a remote signal from a predetermined specific remote controller that is scheduled to be installed at a position where the elevating opening / closing member is visually recognized is included.

According to the tenth aspect, when a failure occurs, the operation of the motor is prohibited. Therefore, for example, by operating the electric switchgear from a remote control device without knowing the occurrence of a failure, it is possible to prevent the electric switchgear from operating abnormally and causing harm to the surroundings. In addition, even in that case, since the elevating opening / closing member can be raised / lowered in response to a remote signal from a specific remote controller that is expected to be installed at a position where the elevating opening / closing member can be visually recognized,
Inspection, repair, removal, etc. of the electric switchgear at the time of failure do not hinder.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
An embodiment of the present invention will be described. 1 to 11
In the embodiment shown in FIG. 1, the same or similar parts are denoted by the same reference numerals. Their functions and names are also the same.

FIG. 1 shows an example of installation of an electric roll screen system as an electric switchgear according to an embodiment of the present invention. Note that the electric opening and closing device is not limited to the electric roll screen device, but may be an electric roman shade, an electric blind, or any other device that raises and lowers the elevating opening and closing member such as a roll screen using an electromagnetic brake.

Referring to FIG. 1, this system includes a plurality (9 in the present embodiment) of electric roll screen devices K1 to K9. These electric roll screen devices K
For example, 1 to K9 are divided into four zones 1 to 4 (zones 2 and 3 are not shown).

For example, zone 1 includes electric roll screen devices K1 and K2, zone 2 (not shown) includes electric roll screen devices K3 and K4 (not shown), and zone 3 (not illustrated) includes electric roll screen devices. K5, K6
(Not shown), zone 4 includes electric roll screen devices K7, K8 (not shown), and K9, respectively.
The configurations of these electric roll screen devices K1 to K9 are the same. Therefore, hereinafter, for example, only the electric roll screen device K1 will be described.

The electric roll screen device K1 includes a roll screen N1, which is an example of a vertically movable member, and a control unit P1 for controlling the drive of the roll screen N1. The control unit P1 is housed above the roll screen N1. The controller L1 is connected to the control unit P1 via a signal line Q1. The control unit P1 of the electric roll screen device K1 raises and lowers the roll screen N1 by the rotation drive unit A1. In particular, a zone controller S is connected to the electric roll screen device K1. This connection is also via the signal line 91. Only one zone controller S is attached to the system.

The control unit P 1
It is connected to another control unit, for example, the control unit P2 of the electric roll screen device K2. Similarly, the electric roll screen devices K3 to K9 are also connected via the interlocking line M. The system further includes a link line M
And a center device 20 for controlling the entire electric roll screen system.

From the center device 20, not all of the electric roll screen devices N1 to N9 are visible. On the other hand, the controllers L1 to L9 are installed immediately adjacent to the corresponding electric roll screen devices K1 to K9, respectively.

In FIG. 1, the lowermost / failure switch units LSD1 and LSD2 are located at the lowest position of the roll screen N1.
However, the upper limit / failure switch unit U (not shown) is located at the highest position.
SDs are provided.

FIG. 2 shows a control unit P1 and a rotation drive unit A.
1 with the controller L1 and the zone controller S
Together with a block diagram. Other control unit P2
The same applies to the configurations of P9 to P9.

Referring to FIG. 2, control unit P1 includes a power supply circuit section 46 for supplying power from a commercial power supply to each section.
A microcomputer 30 for executing processing for controlling the roll screen based on remote signals from the zone controller S, the controller L1, etc., and signals and programs described below, and at the time of a power failure for holding control data. And an upper limit / failure switch for receiving the input from the upper limit / failure switch unit USD set at the position where the roll screen is to be stopped when the roll screen is to be stopped, and giving the input to the microcomputer 30. An input unit 44 and an input from a lower limit / failure switch unit LSD set at a position to be stopped when the roll screen is lowered, or a failure switch (not shown) that generates a signal when the roll screen contacts a human body or the like when lowered. Lower limit for receiving input from and giving to microcomputer 30 A fault switch input unit 46, a controller input / output unit 48 for inputting / outputting remote signals from the zone controller S and the controller L1, and a display circuit connected to the microcomputer 30 for displaying the status of the control unit P1 Unit 60, an interlocking line input unit 50 and an interlocking line output unit 52 for inputting and outputting a signal between the unit 60 and another control unit via an interlocking line M;
A position encoder input unit 54 for receiving a signal for counting the vertical position of the roll screen given from 1 and supplying the signal to the microcomputer 30, and for driving a motor for raising and lowering the roll screen according to the output of the microcomputer 30. And an electromagnetic brake driving unit 58 that performs a braking function when ascending and descending and controls the driving of an electromagnetic brake.

The rotation drive section A1 detects the rotation of the electric motor with the electromagnetic brake for raising and lowering the roll screen, and supplies an encoder signal corresponding to the rotation to the position encoder input section 54; And an electromagnetic brake unit 66. The rotation motor unit 64 is driven based on a signal from the up / down motor drive unit 56. The electromagnetic brake unit 66 operates under the control of the electromagnetic brake driving unit 58.

In this embodiment, the interlocking line output unit 52 is connected to the interlocking line input unit of another control unit P2, and transmits and receives signals to and from each other. In this way, each control unit is connected in order and finally connected to the center device 20 (FIG. 1). Therefore, all control units can be remotely controlled from the center device 20.

The electric roll screen device is similar to the electric blind, but the thing corresponding to the lifting tape in the case of the electric blind is a roll screen, which moves up and down. There is no opening / closing operation like a blind, and only an elevating operation is performed.

The rotary drive section A1 is housed in a rotary drum installed above the roll screen N1, as shown in FIG. The rotation drive unit A1 raises and lowers the roll screen by the rotation of the rotation motor unit 64, and also supplies an encoder signal corresponding to the rotation of the rotation motor unit 64 to the control unit P1. For example, a photointerrupter can be used for the encoder detection unit 62. This is described in, for example, JP-A-4-16591. In addition, it is conceivable to use a hall element, a magnetoresistive element, or the like. The electromagnetic brake section 66 is also housed in the rotation drive section A1 mechanically integrally.

In the system shown in FIGS. 1 and 2, the zone controller S or the center device 20 can set the uppermost position and the lowermost position in each of the control units P1 to P9. When this setting is performed, each electric roll screen device can perform a raising and lowering operation of the roll screen. After the completion of this setting, the controllers L1 to L9 can also control the elevating operation of the electric roll screen devices K1 to K9, respectively.

FIG. 3 is a circuit diagram of the electromagnetic brake driving section 58 for controlling the brake BK constituting the electromagnetic brake section 66. In the device of this embodiment, the electromagnetic brake BK
Is a DC electromagnetic brake, but an AC electromagnetic brake may be used as described later. As shown in FIG. 3, the electromagnetic brake driving section 58 operates in response to a command given from the output port 72 of the microcomputer 30, and a signal indicating the driving state is given to the input port 70 of the microcomputer 30. . In any of the examples described below, the brake BK always operates to fix the roll screen. The electromagnetic brake is released by passing a current. This is the same in the case of the AC electromagnetic brake described later.

FIG. 3 shows the abnormality of the DC electromagnetic brake BK.
2 shows a circuit for monitoring using voltage. Referring to FIG. 3, the electromagnetic brake driving unit 58 includes resistors R1, R2 and R3,
Includes transistor Q1 and diodes D1 and D2. The base electrode of transistor Q1 is connected to output port 72 of microcomputer 30 via resistor R2. The emitter of transistor Q1 is connected to ground potential. The resistor R3 is connected between the base electrode and the emitter of the transistor Q1. DC electromagnetic brake BK is connected between the collector electrode of transistor Q1 and DC power supply V +. A diode D1 is connected between the input port 70 of the microcomputer 30 and the collector of the transistor Q1.
Are connected in this direction. The resistor R1 is connected to the input port 70
And power supply voltage Vcc. Furthermore, a diode D2 is connected in parallel with the brake BK and with the transistor Q
1 is connected in the direction of the DC power supply V +. The diode D2 is a protection element for absorbing electromagnetic noise.

The principle for detecting a defect in the electromagnetic brake unit 66 and the electromagnetic brake driving unit 58 in the circuit shown in FIG. 3 will be described. First, if the signal input to the input port 70 of the microcomputer 30 is at a high level, the transistor Q1 is off and the electromagnetic brake driving unit 58 is normal. If the signal input to the input port 70 is at a low level, a short-circuit failure of the transistor Q1
Other defects.

Next, a case where a command (high-level signal) for releasing the DC electromagnetic brake is output from the output port 72 will be considered. In this case, the signal that turns on the transistor Q1 and enters the input port 70 should be low. Therefore, if the signal at the input port 70 changes to low level after the command signal is output from the output port 72, the electromagnetic brake driving unit 58 is normal. If the signal input to the input port 70 remains at the high level, the operation of the electromagnetic brake driving unit 58 cannot be said to be normal because the operation of the transistor Q1 is defective or other defects.

FIGS. 4 and 5 show that the microcomputer 30 detects an abnormality in the electromagnetic brake section 66 and the electromagnetic brake drive section 58 before the ascent / descent operation in accordance with the above principle. FIG. 9 shows a flowchart of a program for realizing a process of not performing the process and a process of monitoring an abnormality of the electromagnetic brake unit 66 and the electromagnetic brake driving unit 58 during the elevating operation and stopping the elevating operation when an abnormality occurs. Note that the flowcharts described below are merely examples, and similar functions can be realized by different flowcharts. Further, in the following flowchart, it is determined whether the electromagnetic brake is normal before and after the elevating operation and during the elevating operation, but it is also possible to employ only one of them.

Referring to FIG. 4, first, in step 80 (hereinafter, "step" will be appropriately omitted), the electromagnetic brake monitoring port (input port 7) of microcomputer 30 will be described.
A determination is made as to whether the signal of 0) is at a high level (normal). If this signal is not at a high level, it is detected that a short circuit has occurred in the electromagnetic brake 66 or the electromagnetic brake drive unit 58, and a failure is displayed on the display circuit unit 60 (see FIG. 2) ( 90), end the processing. At this time, a signal indicating that the controller is not normal is transmitted to the center device 20 shown in FIG. Upon receiving this signal, the center device 20 displays to the outside that an abnormality has occurred in the electric roll screen device K1, or notifies the external device by sounding a buzzer.

If the signal at the input port 70 is high level (normal) at step 80, the electromagnetic brake is first released (82). That is, a command signal for releasing the electromagnetic brake is output from the output port 72 (see FIG. 3). Subsequently, it is determined whether or not the signal of the electromagnetic brake monitoring port (input port 70) of the microcomputer 30 is at a low level (normal) (84). If this signal is not low level, it means that an operation failure (electromagnetic brake release phenomenon) of the electromagnetic brake unit 66 or the electromagnetic brake drive unit 58 has been detected. (90), and the operation ends.

If the result of determination in step 84 is that the signal at input port 70 is low, electromagnetic brake 66
Then, since it is determined that the electromagnetic brake driving section 58 is normal, the rotary motor section 64 is driven to perform the up / down operation (86).

FIG. 5 shows the details of the processing of the elevating operation 86. Referring to FIG. 5, first, it is determined whether the signal of the electromagnetic brake monitoring port (input port 70) of microcomputer 30 is at a low level (normal) (110). If this signal is not low level, it means that the electromagnetic brake unit 66 or the electromagnetic brake driving unit 58 has an open failure during the elevating operation.
The lifting operation is stopped by stopping the driving of the rotary motor unit 64 (118), a failure is displayed (120), and the process is terminated.

If it is determined in step 110 that the signal at the input port 70 is at the low level, the electromagnetic brake 66 and the electromagnetic brake drive 58 are normal, so that a constant elevating operation is continued (112). Subsequently, it is determined whether or not the lifting operation should be terminated, that is, whether or not the set position to be stopped has been reached (114). If the set position to be stopped has not been reached, control is performed again at step 1
Returning to 10, the monitoring of the electromagnetic brake and the elevating operation are continued.

If it is determined in step 114 that the set position to be stopped has been reached, the driving of the rotary motor unit 64 is stopped (116), and the process is terminated.

As described above, in the electric roll screen device of this embodiment, the electromagnetic brake is constantly monitored even during the elevating operation of the roll screen. For example, the microcomputer 30 monitors the electromagnetic brake even though the electromagnetic brake should be released.
If the signal of the input port 70 becomes high level and it is determined that the electromagnetic brake is not released,
The lifting operation is immediately terminated. Therefore, when an abnormality occurs in the electromagnetic brake during the elevating operation, the roll screen can be stopped without causing any harm to the surroundings.

FIG. 6 shows a flowchart when the microcomputer 30 monitors the rotation drive unit A1 even when the roll screen is stopped (stop mode). Referring to FIG. 6, in the stop mode, first, it is determined whether or not there is an encoder input from encoder detector 62 (130). If there is no encoder input, it is normal. Therefore, after confirming that the driving of the rotary motor unit 64 has stopped (140), the process ends.

If there is an encoder input in step 130, the roll screen device is stopped in the following manner, since it should not be originally present. First, a low-speed operation mode is set (132). The low-speed operation mode is a mode in which the moving speed of the roll screen is operated at such a low speed as to cause no harm even when the roll screen hits a human body or an object. For example, when a DC motor is used, the moving speed of the roll screen can be controlled by controlling the applied power by a PWM (pulse width modulation) method. In an AC motor, low-speed operation can be realized by controlling the number of applied half-waves or full-waves of the power supply frequency.

When such a failure occurs and the electromagnetic brake malfunctions, the roll screen starts dropping by gravity. For example, as described below, when the roll screen falls by a certain amount, for example, two rotations, the roll screen is forcibly further lowered by the certain amount within the certain amount, for example, one rotation in the low-speed operation mode described above. . For this purpose, it is first determined whether the rotation amount has reached two rotations (134). If not, this determination is repeated. When the rotation amount reaches two rotations, the roll screen is forcibly lowered only one more rotation (136). Thereafter, it is determined whether or not the roll screen has reached near the lower limit position by checking the output of the lower limit / failure switch unit LSD (138). If it is not near the lower limit position, the process returns to step 134 again and step 13
Steps 4 to 138 are repeated. When it is determined that the rotation has reached the lower limit position, the driving of the rotation motor unit 64 is stopped (14).
0) End the process.

By performing the above control, when the roll screen drops due to acceleration due to gravity, the motor can be operated in the low-speed operation mode to perform the braking operation on the roll screen using the back electromotive force. . Therefore, the speed increase of the roll screen is reduced, and even if the roll screen collides with a human body or an object, the impact at that time can be reduced.

By the way, if the electric roll screen is operated when a failure occurs, there is a danger that the roll screen falls or an excessive force is applied to the roll screen. On the other hand, when the roll screen is stopped at an intermediate position due to a failure, if the roll screen cannot be moved, work such as inspection, repair, and removal of the roll screen will be hindered. Therefore, in the electric roll screen device according to the present embodiment, a control device that is expected to be installed at a close position where the device can be visually recognized, for example, the system shown in FIG. 1 operates according to a signal from the controller L1 or the like. It is prohibited to operate by a remote signal from a control device that is expected to be installed at a position where the user cannot visually recognize, for example, the center device 20 shown in FIG. FIG. 7 is a flowchart of a program executed by the microcomputer 30 in that case.
Shown in

Referring to FIG. 7, when receiving a remote signal, microcomputer 30 changes the signal source of the signal to interlocking line M.
It is determined whether or not (150). In the case of this embodiment,
Since the controller input / output unit, the interlocking line input unit, and the interlocking line output unit are separate circuit portions, the microcomputer 30 can make this determination. Alternatively, in the case where information for specifying the transmission source is included in the input signal, the determination can be made using the information.

If the result of this determination is NO, it is known that the signal source is an input from the controller L1 (15
6) Perform normal lifting operation (158). Even if this raising / lowering operation causes some trouble,
Since the controller L1 is arranged right next to the electric roll screen device, the operator can take immediate action.

On the other hand, if it is determined that the signal source is the interlocking line M, the operation is prohibited to prevent danger (152) because it is a signal from a remote control device, for example, the center device 20 shown in FIG. ) And display the failure again (15
4), end the process. In this way, by prohibiting the elevating operation by the control signal from the remote control device, it is possible to prevent occurrence of danger due to forcible elevating operation when a failure occurs.

In the above description of the embodiment, the DC electromagnetic brake is used as the electromagnetic brake, and the elevation control is performed by detecting the voltage change of the DC electromagnetic brake. However, the invention is not so limited. Various modifications can be made. FIG. 8 shows a modified example thereof.

The example shown in FIG. 8 also uses the DC electromagnetic brake BK, but differs from the above-described one in that a method of confirming the occurrence of a fault condition with the current flowing through the DC electromagnetic brake is used. The electromagnetic brake driving unit in this case includes resistors R2, R3, R4, R5, and R7, a transistor Q1, a photocoupler PC1, and a diode D2. The base electrode of transistor Q1 is connected to output port 72 of microcomputer 30 via resistor R2. The emitter of transistor Q1 is connected to ground potential. The resistor R3 is connected between the base electrode of the transistor Q1 and the ground potential. The collector of transistor Q1 is connected to one end of brake BK via resistors R4 and R5. The other end of brake BK is connected to DC power supply V +. A diode D2 is connected in parallel with the brake BK and in the direction from the resistor R5 to the DC power supply V +. To both ends of the resistor R5, a photocoupler PC1 is connected in parallel with the resistor R5. The photocoupler PC1 is connected in series with the resistor R7 between the power supply potential Vcc and the ground potential. A contact point between the resistor R7 and the photocoupler PC1 is connected to the input port 70 of the microcomputer 30.

In the circuit shown in FIG. 8, first, the signal level of the input port 70 is checked. If this signal is at a high level, the transistor Q1 is off and normal.
If the signal at the input port 70 is at a low level, the transistor Q1 is defective or another defect, so the DC electromagnetic brake cannot be said to be normal.

When a command (high-level signal) for releasing DC electromagnetic brake BK is output from output port 72, transistor Q1 turns on. As a result, the photocoupler PC1 is also turned on, and the signal at the input port 70 should be low. Therefore, if the input port 70 goes low, the circuit is normal. If input port 70
Is high level, the transistor Q1
Or other defect, the DC electromagnetic brake is not normal.

The same determination as that of FIG. 3 can be made by using the circuit shown in FIG. As still another example, FIG. 9 shows a circuit for monitoring an AC electromagnetic brake. The example shown in FIG. 9 further detects the current flowing in parallel with the current flowing through the AC electromagnetic brake, predicts the current flowing through the AC electromagnetic brake, and determines whether the circuit is normal / abnormal based on the current value. It is.

Referring to FIG. 9, this circuit includes resistors R1 and R
2, R3, R4, R5, R6, R7 and R8, transistor Q1, photocouplers PC1 and PC2,
Triac T1, capacitor C1, and varistor V1
And The base electrode of transistor Q1 is connected to output port 72 via resistor R1. Transistor Q1
Are connected to ground potential. The resistor R2 is connected between the base electrode of the transistor Q1 and the ground potential. The collector of the transistor Q1 is a photocoupler PC1.
And a power supply potential Vcc via a resistor R4.
A resistor R3 is connected between the power supply potential Vcc and the input port 70. An AC electromagnetic brake BK and a triac T1 are connected in series between AC power supplies Vac, Vac.
A photocoupler PC2 is connected between the two contacts and the gate electrode of the triac T1. Further Triac T1
A resistor R5 is connected between the gate electrode and one end. A capacitor C1 and a resistor R6 are connected in parallel with the triac T1.
Are connected in series, and a varistor V1 is connected in parallel with them.

The resistors R8 and R7 are connected in parallel with the brake BK.
Are connected in series. Photocoupler P in parallel with resistor R7
C1 is connected, and the photocoupler PC1 is also connected to the ground potential and the input port 70.

In the circuit shown in FIG. 9, at first, no current flows through the AC electromagnetic brake BK. No current flows to the current detecting element in parallel with the AC electromagnetic brake BK. Therefore, looking at the signal of the input port 70, if the signal is at a high level, the circuit is normal. If this signal is at a low level, the transistor Q1 is defective or has another defect. Therefore, it is not determined that the AC electromagnetic brake is normal.

Next, when a command (high-level signal) for releasing the AC electromagnetic brake BK is output from the output port 72, if the transistor Q1 is normal, the photocoupler PC2 is turned on and the triac T1 is turned on. Then, a current flows through the electromagnetic brake BK. At the same time, photocoupler P
A current also flows through C1, and as a result, the signal at the input port 70 goes low. This is normal. If input port 70 remains high, transistor Q
1 is defective or other defective. Therefore, in this case, it is not determined that the AC electromagnetic brake is normal.

In FIG. 9, the capacitor C1 and the resistor R
The varistor 6 and the varistor V1 are protection elements at the time of switching of the triac T1.

FIG. 10 shows another example of a circuit for monitoring an electromagnetic brake when an AC electromagnetic brake is used.
This circuit monitors the operation of the electromagnetic brake by directly detecting the current flowing through the electromagnetic brake.

Referring to FIG. 10, this circuit includes resistors R1 to R1.
R8, photocouplers PC1 and PC2, transistors Q1 and Q2, triac T1, capacitor C1, varistor V1, and diodes D1 to D7.

The resistor R1 is connected between the base electrode of the transistor Q1 and the output port 72. The emitter of transistor Q1 is connected to ground potential. The resistor R2 is connected between the base electrode of the transistor Q1 and the ground potential. The resistor R3 is connected between the power supply potential Vcc and the input port 70. Photocoupler PC2 and resistor R4
Are connected in series between the collector of the transistor Q1 and the power supply potential Vcc.

The photocoupler PC1 is connected between the input port 70 and the ground potential, and includes diodes D1 to D7.
Further, it is controlled by a constant voltage circuit for generating a low voltage composed of the resistors R7 and R8 and the transistor Q2, and detects the current when the current flows to the brake BK.

Between the two AC power supplies Vac, Vac:
The brake BK, the triac T1, and the above-described constant voltage circuit are connected in series in this order. Electromagnetic brake B
The contact between K and the triac T1 is connected to the photocoupler PC2, and the photocoupler PC2 is further connected to the triac T1.
1 gate electrode. The resistor R5 is connected to the gate electrode of the triac T1 and the contact of the triac T1 and the low voltage circuit. A capacitor C1 and a resistor R6 are connected in this order in parallel with the triac T1, and a varistor V1 is connected in parallel with these.

The emitter side terminal of the photocoupler PC 1 is connected to the ground potential, and the collector side terminal is connected to the input port 70.

The circuit shown in FIG. 10 operates as follows. First, consider the case where no current is flowing through AC electromagnetic brake BK. At this time, the current detection device PC1 inserted in series with the AC electromagnetic brake BK is also off.
Therefore, the input port 70 of the microcomputer 30
Becomes high level. That is, if the potential of the signal at the input port 70 is at a high level, the circuit is normal. If the potential of the input port 70 is low, the transistor Q1
Defective or other defective. Therefore, in this case, it is not determined that AC electromagnetic brake BK is normal.

Next, it is assumed that a command to release the AC electromagnetic brake BK is output from the output port 72 of the microcomputer 30. The transistor Q1 turns on, and the photocoupler PC2 turns on. As a result Triac T
1 is also turned on, and a current flows through the electromagnetic brake BK.

The half-wave of the alternating current thus flowing flows through the diode D7. The remaining half-waves of different polarities are diodes D3-D6 and diodes D1, D
2. The current flows through a constant current circuit including the resistor R7, the transistor Q2, and the resistor R8, and turns on the photocoupler PC1. As a result, the potential of the input port 70 becomes low level. That is, when the potential of the input port 70 becomes low level, the circuit is normal. If the potential of the input port 1 remains at the high level, it is a defect of the transistor Q1 or another defect. Therefore, in this case, it is not determined that the AC electromagnetic brake is normal.

As described above, according to the present invention, regardless of DC or AC, before starting the elevating operation of the electromagnetic brake,
It is possible to reliably determine whether the circuit related to the electromagnetic brake is normal. If it is determined that the electromagnetic brake is defective, the elevating operation is terminated (discarded). Also,
The electromagnetic brake is always monitored even after starting the elevating operation, and if a defect is detected, the elevating operation is terminated at that time. Therefore, safety during operation of the electric roll screen can be improved. Furthermore, when the roll screen starts to fall in the stop mode due to a failure of the electromagnetic brake or the like, the fall can be braked by forcibly operating the drive circuit at a low speed. Since the falling speed can be reduced, there is little danger even if the roll screen collides with a person or an object.

Further, in response to a remote signal from a remote control device (for example, a center device) which is assumed to be installed at a position where the roll screen cannot be visually recognized,
If a failure has occurred, the operation is prohibited. For this reason, there is less possibility that danger will be caused by operating the electric roll screen despite the occurrence of a failure. Further, in this case, the apparatus operates in response to a control signal from a controller which is expected to be installed in the immediate vicinity of the electric roll screen, for example. Therefore, for example, the roll screen can be moved up and down for repair, and the work for inspection, repair, removal, and the like can be easily performed.

By the way, in the apparatus of the above-described embodiment, as shown in FIG. 2, the rotary drive section A1 is provided with the encoder detecting section 62, and by observing the output of this encoder, the roll screen of the roll screen in the stop mode is obtained. Abnormal movement could be detected. However, there are also electric roll screens in which the encoder detection unit 62 is not mounted, such as small-sized products and low-cost products. In this case, it is not possible to detect the falling speed of the roll screen (the number of rotations of the rotation drive unit). As a result, the number of rotations of the rotation motor unit 64 cannot be controlled. Therefore, in this case, the roll screen is forcibly set to the low speed mode and the roll screen is lowered to the lower limit switch LSD as follows. FIG. 11 shows a flowchart in that case. The following flowchart is for the case where the encoder detection unit 62 can be shared by both a device with and without a device.

Referring to FIG. 11, in step 180, it is determined whether or not the setting is such that encoder detection unit 62 is not provided. In the case of a certain setting of the encoder detection unit 62, the control is advanced to step 196, and the up / down operation is performed by the speed control method based on the encoder signal as described above (19
8). When the predetermined ascent / descent is completed, the operation is stopped and the process is terminated (194).

If it is determined in step 180 that the setting of the encoder detector 62 is a certain setting, the speed control is set to a low speed setting (182). Next, the electromagnetic brake monitoring port (input port 70) of the microcomputer 30
It is determined whether the signal is high level (normal) (18)
4). If this signal is at a low level, it means that a short-circuit phenomenon (failure) of the electromagnetic brake drive unit has been detected, so a failure is displayed (214) and the operation is stopped (194).

If it is determined in step 184 that the signal of the electromagnetic brake monitoring port (input port 70) of the microcomputer 30 is at the high level, the electromagnetic brake is released (186). Then, it is determined whether or not the signal of the electromagnetic brake monitoring port (input port 70) is at a low level (188). When this signal does not become low level, it is detected that an opening phenomenon (failure) has occurred in the electromagnetic brake driving unit, so that the electromagnetic brake is operated (212) and a failure is displayed (21).
4) Stop the operation.

If it is determined in step 188 that the signal at the input port 70 has become low level, a predetermined elevating operation is started (190), and until it is determined that the upper / lower limit switch has been operated (192). The elevating operation from step 188 is continued. When it is determined that the upper / lower switch has been operated, the operation is stopped (194) and the process ends.

As described above, when the encoder detection unit 62 is not provided, when a failure is detected in the electromagnetic brake, the ascending and descending speed is reduced, and the roll screen is moved to the lowest (or highest) position. Lower (rise) and fix there. Thereby, the roll screen does not stop at a position in the middle, and it is possible to prevent harm caused by dropping the roll screen.

As described above, according to the present invention, it is possible to confirm whether or not the electromagnetic brake operates normally before starting the elevating operation, not after the electric opening / closing device starts the elevating operation. After the electromagnetic brake is confirmed to be working properly, the operation shifts to the elevating operation, so that safety can be secured in advance.

If it is supposed that the electromagnetic brake operates normally based on the voltage when the electromagnetic brake is DC, the current flowing through the sensing element can be small. The temperature rise of the element is small, the device can be downsized, and a low-cost and safe device can be realized. Further, when detecting whether or not the electromagnetic brake normally operates based on the current flowing through the DC electromagnetic brake, the detection can be performed more reliably than the method of monitoring the voltage.

The same applies to the case of the AC electromagnetic brake. When a current flowing in parallel with the AC electromagnetic brake is detected, the current flowing to the detection element can be small. The temperature rise of the element is small, and the device can be reduced in size and cost. In addition, when the current flowing in series with the AC electromagnetic brake is directly detected, it can be more reliably confirmed whether the electromagnetic brake is normal or not as compared with the method of monitoring the parallel current.

The electromagnetic brake is constantly monitored even during the elevating operation, and if an abnormality occurs, the driving of the electromagnetic brake is stopped. It is safer than continuing the lifting operation. Also, from the encoder signal during the stop mode,
When the lowering operation of the elevating opening / closing member of the electric opening / closing member is detected and the forcible low-speed lowering operation is performed, it is determined that the elevating opening / closing member is accelerated and dropped by gravity, and the braking operation using the back electromotive force of the rotary motor. Can be prevented.
The descent speed of the elevating opening / closing member can be reduced, and the risk of harm to a person or an object can be reduced. In a device not provided with the encoder detection unit, the lowering switch (LSD) fixes the elevating opening / closing member to a safe lowermost position. As a result, accidents can be prevented.

In the event of a failure, a controller such as a center device that is distant from the failed electric switchgear prohibits the remote lifting operation of the lifting member. Therefore, abnormal operation of the failed electric switchgear can be prevented. In addition, since the electric switch is operated according to a control signal from a controller that is to be installed right next to the electric switch, there is no hindrance to operations such as inspection, repair, and removal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an electric roll screen system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control unit of the electric roll screen device according to the first embodiment.

FIG. 3 is a circuit diagram of an electromagnetic brake driving unit according to the first embodiment.

FIG. 4 is a flowchart showing a process performed by the microcomputer according to the first embodiment at the time of starting a lifting drive operation.

FIG. 5 is a flowchart of a process performed by a microcomputer during a lifting operation.

FIG. 6 is a flowchart of a control process executed in a microcomputer during a stop mode.

FIG. 7 is a flowchart of a process of prohibiting or permitting operation of a microcomputer according to the first embodiment by a source of a remote signal.

FIG. 8 is a circuit diagram showing another example of an electromagnetic brake driving unit in the case of a DC electromagnetic brake.

FIG. 9 is a circuit diagram of an example of an electromagnetic brake driving unit when an AC electromagnetic brake is used.

FIG. 10 is a circuit diagram showing another example of an electromagnetic brake driving unit when an AC electromagnetic brake is used.

FIG. 11 is a flowchart of a process performed by a microcomputer when a fall of a roll screen is detected when there is no encoder detection unit.

FIG. 12 shows a conventional electric roll screen device.
FIG. 3 is a circuit diagram illustrating a drive circuit of the DC electromagnetic brake.

FIG. 13 is a circuit diagram of an electromagnetic brake driving unit when an AC electromagnetic brake is used in a conventional electric roll screen.

[Explanation of symbols]

 A1 to A9 Rotation drive unit K1 to K9 Electric roll screen device L1 to L9 Controller N1 to N9 Roll screen P1 to P9 Control unit 30 Microcomputer 54 Position encoder input unit 58 Electromagnetic brake drive unit 62 Encoder detection unit 66 Electromagnetic brake unit

Claims (10)

[Claims] 1. An electronic device comprising: an elevating opening / closing member; an electric motor with an electromagnetic brake for elevating the elevating opening / closing member; and control means for controlling the electric motor in response to a remote control signal. Fix the lifting member
Before the current is applied, the brake is released, and the control means responds to the remote control signal, activates the electric motor, and raises / lowers the elevating opening / closing member. An electric switchgear, characterized in that it includes a confirmation means for detecting whether the operation is normal and performing a lifting operation when the operation is normal. 2. The checking means monitors whether or not the electromagnetic brake is normal even when the electric motor is operating to move the elevating opening / closing member up and down. The electric switchgear according to claim 1, wherein the lifting operation is stopped. 3. The electromagnetic brake is a direct-current electromagnetic brake, and the checking means determines whether the direct-current electromagnetic brake is short-circuited or open based on a direct-current voltage value applied to the direct-current electromagnetic brake. The electric switchgear according to claim 1 or 2, further comprising means for confirming that there is no switch. 4. The electromagnetic brake is a DC electromagnetic brake, and the checking means is configured to determine that neither the short-circuit state nor the open state of the DC electromagnetic brake has occurred based on a DC current value passing through the DC electromagnetic brake. The electric switchgear according to claim 1 or 2, further comprising means for confirming. 5. The electromagnetic brake is an AC electromagnetic brake, and the checking means predicts a current value flowing through the AC electromagnetic brake from a current flowing in parallel with the AC electromagnetic brake, and based on the predicted current value. The electric switchgear according to claim 1 or 2, further comprising means for confirming that neither the short-circuit state nor the open state of the AC electromagnetic brake has occurred. 6. The electromagnetic brake is an AC electromagnetic brake, and the confirming means does not generate any of a short circuit state and an open state of the AC electromagnetic brake based on a current value flowing through the AC electromagnetic brake. The electric switchgear according to claim 1 or 2, further comprising means for confirming. 7. An elevating opening / closing member, an electric motor with an electromagnetic brake for elevating the elevating opening / closing member, an open state detecting means for detecting an open state of the electromagnetic brake, and a remote control signal in response to a remote control signal. Control means for controlling an electric motor, wherein the electromagnetic brake always fixes the elevating opening / closing member,
When the current is applied, the brake is released, and the control unit ends the lifting / lowering driving operation when the opening state detection unit detects that the electromagnetic brake is in the released state during the lifting / lowering operation of the lifting / lowering opening / closing member. An electric switchgear, characterized in that: 8. An elevating opening / closing member, an electric motor with an electromagnetic brake for elevating the elevating opening / closing member, a movement detecting means for detecting a moving amount of the elevating opening / closing member, and a remote control signal in response to a remote control signal. Control means for controlling an electric motor, wherein the electromagnetic brake always fixes the elevating opening / closing member,
The brake is released by the application of the current, and the control means responds to the movement detection means detecting the movement of the elevating opening / closing member in the stop mode of the elevating opening / closing member. An electric opening / closing device, which performs an operation for forcibly lowering the elevating opening / closing member within a range of the detected movement amount and at a predetermined low speed. 9. An elevating opening / closing member, an electric motor with an electromagnetic brake for raising / lowering the elevating opening / closing member, and control means for controlling the electric motor in response to a remote control signal, wherein the electromagnetic brake is always Fix the lifting member
When the current is applied, the brake is released, and the control means forcibly resets the elevating opening / closing member in response to the detection of the movement of the elevating opening / closing member in the stop mode of the elevating opening / closing member. An electric switchgear, which performs an operation for lowering to a lowering position. 10. A control device for controlling the electric motor in response to a remote control signal, comprising: an elevating opening / closing member, an electric motor with an electromagnetic brake for elevating the elevating opening / closing member, and a control means for controlling the electric motor in response to a remote control signal. Means for detecting a failure state of the brake; prohibiting means for prohibiting the operation of the motor in response to the detection of the failure state by the failure state detecting means; and After prohibiting the operation, the electric motor includes a means for driving the electric motor in response to only a remote signal from a specific remote controller predetermined to be installed at a position where the elevating opening / closing member is visually recognized, Switchgear.