JP3512324B2 - Electric switchgear - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device such as an electric roll screen, an electric roman shade, or the like for raising and lowering an elevating and lowering opening / closing member by an electric motor. Regarding

[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 switchgear. With reference to FIG. 12, the control circuit includes a microcomputer 220 for executing a program for controlling the electromagnetic brake BK, and a microcomputer 220.
It includes resistors R2 and R3 for controlling the brake BK, a transistor Q1 and a diode D1 which are formed of a solenoid drive circuit which receives an output of the output port 222 of FIG.

One terminal of the resistor R2 is connected to the output port 222. The other terminal of the resistor R2 is a transistor Q
1 is connected to the base. The emitter of the transistor Q1 is connected to the 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 the brake BK including a solenoid drive circuit. The other terminal of the brake BK is connected to the power supply potential V +. Further, the diode D1 is connected in parallel with the brake BK in the direction from the transistor Q1 toward the power supply potential V +. The electromagnetic brake shown in FIG. 12 is a DC electromagnetic brake.

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

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 the transistor Q1 is connected to the ground potential. The collector of the transistor Q1 is connected to the power supply potential Vcc via the photocoupler PC1 and the resistor R4. One terminal of TRIAC T1 is brake BK
The other terminal is connected to the 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
The capacitor C1 and the resistor R6 are connected in parallel with, and the varistor V1 is also connected in parallel with these. The diode D1 is connected in parallel with the brake BK and from the triac T1 toward the AC power supply Vac side. The other terminal of the brake BK is connected to the AC power supply Vac.

Whether in the case of the DC electromagnetic brake shown in FIG. 12 or in the case of the AC electromagnetic brake shown in FIG. 13, it is essentially a solenoid drive circuit for driving 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]

When the energization of the solenoid is simply turned on / off based on the command from the microcomputer 220 as described above, there are the following problems.

(1) In an electric roll screen,
If the electromagnetic brake is out of order, gravity may cause the roll screen to fall. In this case, the falling roll screen collides with people and objects, which is dangerous.

(2) When the electromagnetic brake fails, the roll screen may stop halfway, and in that case, there is a risk that the roll screen cannot be repaired or removed.

(3) If the electromagnetic brake fails during the lifting operation, it may not be possible to stop the roll screen at an appropriate position.

(4) Although there is a system capable of remotely controlling the electric roll screen, if the electromagnetic brake fails, it is dangerous to operate the electric roll screen by remote control from a position where it cannot be visually recognized.

Such a problem is not limited to the electric roll screen, but is common to general electric opening / closing devices that electrically raise and lower an elevating opening / closing member such as a roll screen.

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

Another object of the present invention is to provide an electric switchgear in which the lifting opening / closing member does not drop and damage the surroundings even if the electromagnetic brake should fail.

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

Another object of the present invention is to provide an electrically operated opening / closing device which can be remotely operated, and cannot be remotely operated from a position where the elevating opening / closing member cannot be visually recognized, while operating from a position where the opening / closing device can be visually recognized for repair. Accordingly, it is an object of the present invention to provide an electric switchgear capable of operating according to the above.

[0017]

[0018]

[0019]

An electric switchgear according to a first aspect of the present invention is provided with an electric roll screen and an electric roller.
Man shades, electric blinds, and other lifting and closing members
And the rotary drive or lifting tape
Electric motor with electromagnetic brake that raises and lowers the opening / closing member
And control means for controlling the electric motor in response to the remote control signal
Including and The electromagnetic brake always fixes the lift opening / closing member.
Then, the brake is released when the current is applied.
The control means activates the electric motor in response to the remote control signal.
Before raising / lowering the lifting / lowering opening / closing member, the electromagnetic brake
Detects whether it is normal, and if it is normal, it moves up and down
Check if the electromagnetic brake is normal even when the electric motor is operating to move up and down the lift opening / closing member, and if an abnormality is found, confirm that the lift operation is stopped.
Including means .

According to the first aspect of the present invention, the electric switching
Before moving the parts up or down, the electromagnetic brake
If it is found that there is a lift, the lifting operation is not performed. According to
Prevent the risk of electromagnetic brake failure
be able to. Even after the lifting operation is started once, if the failure of the electromagnetic brake is detected during the lifting operation, the lifting operation is automatically stopped. Even if a failure occurs, it is possible to prevent the danger when the lifting operation is continued.

In the electric switchgear according to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, the electromagnetic brake is a direct current electromagnetic brake. The confirmation means includes means for confirming that neither a short-circuited state nor an open state of the DC electromagnetic brake has occurred, based on the DC voltage value applied to the DC electromagnetic brake.

In the electric switchgear according to the invention of claim 3 , in addition to the structure of the invention of claim 1 , the electromagnetic brake is a direct-current electromagnetic brake. The confirmation means includes means for confirming that neither the short-circuited state nor the open state of the DC electromagnetic brake has occurred, based on the value of the DC current passing through the DC electromagnetic brake.

In the electric switchgear according to a fourth aspect of the invention, in addition to the configuration of the first aspect of the invention, the electromagnetic brake is an AC electromagnetic brake. The confirmation means predicts the value of the current flowing through the AC electromagnetic brake from the current flowing in parallel with the AC electromagnetic brake, and based on the predicted current value, neither the short circuit state nor the open state of the AC electromagnetic brake has occurred. Including means for confirming.

In the electric switchgear according to a fifth aspect of the invention, in addition to the configuration of the first aspect of the invention, the electromagnetic brake is an AC electromagnetic brake. The confirmation means includes means for confirming that neither the short-circuited state nor the open state of the AC electromagnetic brake has occurred, based on the value of the current flowing through the AC electromagnetic brake.

In this way, whether or not the electromagnetic brake is of the DC type or the AC type can be appropriately checked for the occurrence of a failure.

According to a sixth aspect of the present invention, there is provided an electric opening / closing device, an elevating opening / closing member, an electric motor with an electromagnetic brake for elevating the elevating 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 lifting and lowering opening / closing member and releases the brake when an electric current is applied. The control means ends the up-and-down drive operation when the open state detection means detects that the electromagnetic brake is in a failure state during the up-and-down operation of the up-and-down opening / closing member.

According to the sixth aspect of the invention, when a failure of the electromagnetic brake is detected during the lifting operation of the lifting opening / closing member, the lifting operation is automatically stopped. Even if a failure occurs, it is possible to prevent the danger when the lifting operation is continued.

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

If it is detected that the electromagnetic brake fails for some reason and the lifting / closing member is moving (falling), the lifting / lowering member is lowered at a low speed.
Therefore, the counter electromotive force of the electric motor reduces the increase in the lowering speed of the lifting / lowering opening / closing member, thereby reducing the risk of the lifting / lowering opening / closing member hitting a person or an object at a high speed.

An electric opening / closing device according to an eighth aspect of the present invention includes 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 lifting / closing member and releases the brake when an electric current is applied. The control means is characterized by performing an operation for forcibly lowering the lifting / closing member in response to detection of movement of the lifting / closing member in the stop mode of the lifting / closing member.

When the lifting / closing member is moved (dropped), the lifting / closing member is forcibly lowered to the lowest position. Therefore, the lifting / closing member is stopped midway and falls again for some reason, causing the surroundings to fall. It is possible to prevent harm to the.

According to a ninth aspect of the present invention, there is provided an electric opening / closing device, which includes an electric roll screen, an electric roman shade, an electric blind, and other raising / lowering opening / closing members, and a rotary drive unit or a lifting tape for raising / lowering the raising / lowering opening / closing members. An electric motor with a brake and control means for controlling the electric motor in response to a remote control signal are included. The control means includes a failure state detecting means for detecting a failure state of the electromagnetic brake, a prohibiting means for inhibiting the operation of the electric motor in response to the detection of the failure state by the failure state detecting means, and a prohibiting means. After prohibiting the operation of the electric motor by the means, in response to only a remote signal from a predetermined specific remote controller, which is scheduled to be installed at a position where the lifting / closing member is visually recognized,
It includes means for driving the electric motor.

According to the ninth aspect of the invention, the operation of the electric motor is prohibited when a failure occurs. Therefore, it is possible to prevent the electric switchgear from performing an abnormal operation and damaging the surroundings by operating the electric switchgear from the remote control device without knowing the occurrence of a failure. Further, even in that case, since the lifting / closing member can be lifted / lowered in response to a remote signal from a specific remote controller that is expected to be installed at a position where the lifting / closing member can be visually recognized,
It does not hinder the inspection, repair, removal, etc. of the electric switchgear at the time of failure.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to FIGS.
An embodiment of the present invention will be described. 1 to 11
In the embodiment shown in, the same or similar parts are provided with the same reference symbols. Their functions and names are also the same.

FIG. 1 shows an installation example of an electric roll screen system as an electric switchgear according to an embodiment of the present invention. Note that the electric opening / closing device is not limited to the electric roll screen device, and may be an electric roman shade, an electric blind, or the like as long as the elevating / closing member such as the roll screen is moved up and down by using an electromagnetic brake.

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

For example, zone 1 has electric roll screen devices K1 and K2, zone 2 (not shown) has electric roll screen devices K3 and K4 (not shown), and zone 3 (not shown) has electric roll screen devices. K5, K6
Zone 4 (not shown) includes electric roll screen devices K7, K8 (not shown), and K9, respectively.
The electric roll screen devices K1 to K9 have the same configuration. Therefore, for example, only the electric roll screen device K1 will be described below.

The electric roll screen device K1 includes a roll screen N1 which is an example of a lift opening / closing member, and a control unit P1 for driving and controlling 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 moves the roll screen N1 up and down 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 P1 is connected via the interlocking line M to
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. This system is also connected to the interlocking line M
And a center unit 20 for controlling the entire electric roll screen system.

Not all the electric roll screen devices N1 to N9 are visible from the center device 20. On the other hand, the controllers L1 to L9 are installed in the immediate vicinity of the corresponding electric roll screen devices K1 to K9.

In FIG. 1, the lower limit / fault switch parts LSD1 and 2 are located at the lowest position of the roll screen N1.
However, the upper limit / fault switch unit U not shown in the uppermost position
Each SD is provided.

FIG. 2 shows the control unit P1 and the rotary drive unit A.
1 and the controller L1 and the zone controller S
It is shown together with the block diagram format. Other control unit P2
The same applies to the configurations of P9 to P9.

Referring to FIG. 2, the control unit P1 has a power supply circuit section 46 for supplying power to each section from a commercial power supply.
And a microcomputer 30 for executing processing for controlling the roll screen based on remote signals from the zone controller S, the controller L1 and the like and signals and programs described below, and a power failure for holding control data. Also, the storage circuit section 42 capable of holding stored data and the upper limit / fault switch for receiving the input from the upper limit / fault switch USD set at the position to be stopped when the roll screen is raised to the microcomputer 30. Input from the input unit 44 and the lower limit / obstacle switch unit LSD set to a position to stop when the roll screen descends, or a fault switch (not shown) that generates a signal when the roll screen comes into contact with a human body or the like when descending. Lower limit for receiving input from the microcomputer 30 Fault switch input section 46, controller input / output section 48 for inputting / outputting remote signals from zone controller S and controller L1, and display circuit connected to microcomputer 30 for displaying the status of control unit P1. The interlocking line input unit 50 and the interlocking line output unit 52 that input and output signals between the unit 60 and another control unit via the interlocking line M, and the rotation drive unit A.
1. A position encoder input unit 54 for receiving a signal for counting the vertical position of the roll screen, which is given from 1, to the microcomputer 30, and for driving a motor for moving the roll screen up and down according to the output of the microcomputer 30. And a lowering and lowering motor driving unit 56, and an electromagnetic brake driving unit 58 for driving and controlling the electromagnetic brake, which performs a braking function when moving up and down.

The rotary drive unit A1 detects the rotation of the electric motor with an electromagnetic brake for raising and lowering the roll screen, and gives an encoder signal corresponding to the rotation to the position encoder input unit 54, and a rotary motor. It includes a portion 64 and an electromagnetic brake portion 66. The rotary 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 drive unit 58.

The interlocking line output section 52 is connected to the interlocking line input section of another control unit P2 in the present embodiment, and sends and receives signals to and from each other. In this way, the control units are sequentially connected 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 roll tape corresponds to the lifting tape in the case of the electric blind, and the roll screen moves up and down. There is no opening / closing operation like the blind, and only the raising / lowering operation is performed.

The rotary drive unit A1 is housed in a rotary drum installed above the roll screen N1 as shown in FIG. The rotation driving unit A1 raises and lowers the roll screen by the rotation of the rotation motor unit 64, and gives an encoder signal corresponding to the rotation of the rotation motor unit 64 to the control unit P1. A photo interrupter can be used as the encoder detector 62, for example. This is described, for example, in JP-A-4-16591. In addition, it is possible to use a Hall element, a magnetoresistive element, or the like. The electromagnetic brake unit 66 is also mechanically integrated and housed in the rotation drive unit A1.

In the system shown in FIGS. 1 and 2, the zone controller S or the center device 20 can set the upper limit position and the lower limit position in each of the control units P1 to P9. When this setting is performed, the roll screens can be raised and lowered in each electric roll screen device. After the completion of this setting, the controllers L1 to L9 can also control the raising and lowering operations of the electric roll screen devices K1 to K9, respectively.

FIG. 3 shows a circuit diagram of the electromagnetic brake drive section 58 for controlling the brake BK which constitutes the electromagnetic brake section 66. In the device of this embodiment, the electromagnetic brake BK
Is a direct current electromagnetic brake, but an alternating current electromagnetic brake may be used as will be described later. As shown in FIG. 3, the electromagnetic brake drive unit 58 operates in response to a command given from the output port 72 of the microcomputer 30, and a signal showing its driving state is given to the input port 70 of the microcomputer 30. . In any of the examples described below, the brake BK always works to fix the roll screen. The electromagnetic brake is released by passing a current. This also applies to the case of the AC electromagnetic brake described later.

FIG. 3 shows the abnormality of the DC electromagnetic brake BK.
The circuit which monitors using a voltage is shown. Referring to FIG. 3, the electromagnetic brake drive unit 58 includes resistors R1, R2 and R3,
It includes a transistor Q1 and diodes D1 and D2. The base electrode of the transistor Q1 is connected to the output port 72 of the microcomputer 30 via the resistor R2. The emitter of the transistor Q1 is connected to the ground potential. The resistor R3 is connected between the base electrode of the transistor Q1 and the emitter. A DC electromagnetic brake BK is connected between the collector electrode of the transistor Q1 and the DC power supply V +. A diode D1 is provided 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 the power supply voltage Vcc. Further, the diode D2 is connected in parallel with the brake BK and the transistor Q
It is connected from the collector of No. 1 toward the DC power supply V +. The diode D2 is a protection element for absorbing electromagnetic noise.

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

Next, consider a case where a command (high-level signal) for releasing the DC electromagnetic brake is output from the output port 72. In this case, the transistor Q1 is turned on and the signal entering the input port 70 should be at the low level. Therefore, if the signal of the input port 70 changes to the low level after the command signal is output from the output port 72, the electromagnetic brake drive unit 58 is normal. If the signal input to the input port 70 remains at the high level, the operation of the electromagnetic brake drive unit 58 cannot be said to be normal due to the malfunction of the transistor Q1 or some other malfunction.

4 and 5, in accordance with the above-described principle, the microcomputer 30 detects an abnormality in the electromagnetic brake unit 66 and the electromagnetic brake drive unit 58 before the raising / lowering operation, and if there is an abnormality, the raising / lowering operation is performed. The flowchart of the program which implement | achieves the process which is not performed and the process which monitors the abnormality of the electromagnetic brake part 66 and the electromagnetic brake drive part 58 also during a raising / lowering operation, and suspends a raising / lowering operation when abnormality generate | occur | produces is shown. It should be noted that the flowcharts shown 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 lifting operation and during the lifting operation, but it is also possible to adopt only one of them.

Referring to FIG. 4, first, at step 80 (hereinafter, “step” is omitted as appropriate), an electromagnetic brake monitoring port (input port 7) of the microcomputer 30.
A determination is made as to whether the signal 0) is at high level (normal). If this signal is not at a high level, it means that it is detected that a short circuit phenomenon has occurred in the electromagnetic brake 66 or the electromagnetic brake drive unit 58, and a failure display is displayed on the display circuit unit 60 (see FIG. 2) ( 90), the process ends. At this time, a signal indicating that the controller is not normal is sent to the center device 20 shown in FIG. 1 via the interlocking line M. When the center device 20 receives this signal, the center device 20 notifies the outside by displaying that an abnormality has occurred in the electric roll screen device K1 or by sounding a buzzer.

If the signal at the input port 70 is at a high level (normal) in 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). Then, it is determined whether the signal of the electromagnetic brake monitoring port (input port 70) of the microcomputer 30 is low level (normal) (84). If this signal is not at a low level, it means that a malfunction (electromagnetic brake opening phenomenon) of the electromagnetic brake unit 66 or the electromagnetic brake drive unit 58 has been detected. Therefore, the electromagnetic brake is activated again (88), and the failure indication is displayed. The operation ends (90), and the operation ends.

If the result of determination in step 84 is that the signal at the input port 70 is at low level, the electromagnetic brake section 66
And, since it is determined that the electromagnetic brake drive unit 58 is normal, the rotary motor unit 64 is driven to perform the lifting operation (86).

The details of the process of the raising / lowering operation 86 are shown in FIG. Referring to FIG. 5, first, it is determined whether the signal of the electromagnetic brake monitoring port (input port 70) of the microcomputer 30 is low level (normal) (110). If this signal is not at the low level, it means that the electromagnetic brake 66 or the electromagnetic brake drive 58 has an open failure during the ascending / descending operation.
By stopping the driving of the rotary motor unit 64, the lifting operation is stopped (118), a failure display is performed (120), and the process is terminated.

If the signal of the input port 70 is determined to be low level in step 110, the electromagnetic brake section 66 and the electromagnetic brake drive section 58 are normal, so that a constant lifting operation is continued (112). Subsequently, it is determined whether or not the raising / lowering operation should be ended, 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 again performed in step 1.
Returning to 10, monitoring of the electromagnetic brake and lifting operation are continued.

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

As described above, in the electric roll screen device according to the present embodiment, the electromagnetic brake is constantly monitored even during the lifting operation of the roll screen. Then, for example, the microcomputer 30 that monitors the electromagnetic brake even though the electromagnetic brake should have been released
When the signal of the input port 70 of becomes the 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 lifting operation, the roll screen can be stopped without harming the surroundings.

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

If there is an encoder input in step 130, this should not be the case, so the roll screen device is stopped as follows. First, the 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 set to such a low speed that does not cause 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 the PWM (pulse width modulation) method. In the AC motor, low speed operation can be realized by controlling the number of half-waves or full-waves of the power supply frequency.

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

By performing the above control, when the roll screen is accelerated and falls due to gravity, the motor can be operated in the low speed operation mode to utilize the back electromotive force to perform the braking operation on the roll screen. . 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, it is dangerous because the roll screen may drop or excessive force may be applied to the roll screen. On the other hand, if the roll screen is stopped at a midway position due to a failure, if the roll screen cannot be moved, the 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 which is expected to be installed at a position where it cannot be visually recognized, for example, the center device 20 shown in FIG. FIG. 7 shows a flowchart of a program executed by the microcomputer 30 in that case.
Shown in.

Referring to FIG. 7, when a remote signal is received, the microcomputer 30 determines that the signal source of the signal is the interlocking line M.
It is determined (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, when the input signal includes information for identifying the transmission source, the information can be used for the determination.

If the result of this determination is NO, it is known that the signal source is the input from the controller L1 (15
6) The normal lifting operation is performed (158). Even if some trouble occurs due to this lifting operation,
Since the controller L1 is arranged in the immediate vicinity of the electric roll screen device, the operator can take immediate action.

On the other hand, when it is determined that the signal source is the interlocking line M, since it is a signal from the remote control device, for example, the center device 20 shown in FIG. 1, the operation is prohibited to prevent danger (152). ), And display the fault again (15
4), the process ends. In this way, by prohibiting the ascending / descending operation by the control signal from the remote control device, it is possible to prevent the danger from being caused by forcibly performing the ascending / descending operation when a failure occurs.

In the above description of the embodiment, the DC electromagnetic brake is used as the electromagnetic brake, and the lifting operation is controlled by detecting the voltage change of the DC electromagnetic brake. However, the invention is not so limited. Various modifications can be made. A modification thereof is shown in FIG.

The example shown in FIG. 8 also uses the DC electromagnetic brake BK, but unlike the above-mentioned one, a method of confirming the occurrence of a failure state by the current flowing through the DC electromagnetic brake is used. The electromagnetic brake drive 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 the transistor Q1 is connected to the output port 72 of the microcomputer 30 via the resistor R2. The emitter of the transistor Q1 is connected to the ground potential. The resistor R3 is connected between the base electrode of the transistor Q1 and the ground potential. The collector of the transistor Q1 is connected to one end of the brake BK via the resistors R4 and R5. The other end of the brake BK is connected to the DC power supply V +. The diode D2 is connected in parallel with the brake BK and in the direction from the resistor R5 to the DC power supply V +. A photocoupler PC1 is connected in parallel with the resistor R5 at both ends of 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 between the resistor R7 and the photocoupler PC1 is connected to the input port 70 of the microcomputer 30.

Also in the circuit shown in FIG. 8, the signal level of the input port 70 is first checked. If this signal is at high level, it means that the transistor Q1 is off, which is normal.
If the signal at the input port 70 is at a low level, it means that the transistor Q1 is defective or some other defect, so the DC electromagnetic brake cannot be said to be normal.

When a command (high level signal) for releasing the DC electromagnetic brake BK is output from the output port 72, the transistor Q1 is turned on. As a result, the photocoupler PC1 should be turned on and the signal at the input port 70 should be at a low level. Therefore, if the input port 70 goes low, the circuit is normal. If input port 70
If the signal at the high level remains high, the transistor Q1
The DC electromagnetic brake is not normal due to a fault or other fault.

The same determination as in FIG. 3 can be performed using the circuit shown in FIG. As yet another example, FIG. 9 shows a circuit for monitoring an AC electromagnetic brake. The example shown in FIG. 9 further predicts the current flowing through the AC electromagnetic brake by detecting the current flowing in parallel with the current flowing through the AC electromagnetic brake, and determines the normality / abnormality of the circuit based on the current value. Is.

Referring to FIG. 9, this circuit includes resistors R1 and R
2, R3, R4, R5, R6, R7 and R8, a transistor Q1, photocouplers PC1 and PC2,
Triac T1, capacitor C1, varistor V1
Including and The base electrode of the transistor Q1 is connected to the output port 72 via the resistor R1. Transistor Q1
Its emitter is 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 the photocoupler PC1.
And a resistor R4 to the power supply potential Vcc.
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 the AC power supplies Vac and Vac.
A photocoupler PC2 is connected between both contacts and the gate electrode of the triac T1. Further TRIAC T1
A resistor R5 is connected between the gate electrode and the one end. A capacitor C1 and a resistor R6 are provided in parallel with the triac T1.
Are connected in series, and a varistor V1 is connected in parallel with these.

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, no current initially flows through the AC electromagnetic brake BK. No current flows through the current detection element that is connected in parallel with the AC electromagnetic brake BK. Therefore, looking at the signal at the input port 70, if the signal is at a high level, the circuit is normal. If this signal is low level, it means that the transistor Q1 is defective or other defective. 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 photo coupler P
A current also flows through C1, and as a result, the signal at the input port 70 becomes low level. This case is normal. If the input port 70 remains high level, the transistor Q
1 is defective or other defective. Therefore, in this case, the AC electromagnetic brake is not determined to be normal.

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

FIG. 10 shows another circuit example for monitoring the electromagnetic brake when the 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 are included.

The resistor R1 is connected between the base electrode of the transistor Q1 and the output port 72. The emitter of the transistor Q1 is connected to the ground potential. The resistor R2 is connected between the base electrode of the transistor Q1 and the ground potential. Resistor R3 is connected between power supply potential Vcc and 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 has diodes D1 to D7.
And a resistor R7 and R8 and a transistor Q2 for controlling a constant voltage circuit for generating a low voltage and detecting the current when the current flows through the brake BK.

Between the two AC power supplies Vac, Vac,
The brake BK, the triac T1, and the constant voltage circuit described above are connected in series in this order. Electromagnetic brake B
The contact point between K and the triac T1 is connected to the photocoupler PC2, and the photocoupler PC2 is further connected to the triac T2.
1 is connected to the gate electrode. The resistor R5 is connected to the gate electrode of the triac T1 and the contacts 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 PC1 is connected to the ground potential, and the collector side terminal is connected to the input port 70, respectively.

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

Next, consider a case where a command for releasing 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 fed by the diodes D3-D6 and the diodes D1, D
2, a resistor R7, a transistor Q2 and a resistor R8 flow through a constant current circuit to turn on the photocoupler PC1. As a result, the potential of the input port 70 becomes low level. That is, if 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 means that the transistor Q1 is defective or other defective. Therefore, in this case, it is not determined that the AC electromagnetic brake is normal.

As described above, according to this embodiment, whether the circuits related to the electromagnetic brake are normal or not can be surely determined before the ascending / descending operation of the electromagnetic brake is started regardless of the direct current and the alternating current. You can If it is determined that the electromagnetic brake is defective, the lifting operation is terminated (abandoned).
Also, the electromagnetic brake is constantly monitored even after the lifting operation is started, and if a defect is detected, the lifting operation is terminated at that point. Therefore, the 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, even if the roll screen collides with a person or an object, there is little danger.

Furthermore, in response to a remote signal from a remote control device (for example, a center device) which is supposed to be installed at a position where the roll screen cannot be visually recognized,
If a failure occurs, the operation is prohibited. Therefore, it is less likely that a danger will be caused by operating the electric roll screen in spite of the failure. Furthermore, in this case, it operates in response to a control signal from a controller which is expected to be installed, for example, in the immediate vicinity of the electric roll screen. Therefore, for example, the roll screen can be moved up and down for repair, and the work for inspection, repair, removal, etc. can be easily performed.

By the way, in the apparatus of the above-mentioned embodiment, as shown in FIG. 2, the rotary drive unit A1 is provided with the encoder detection unit 62, and by observing the output of this encoder, the roll screen in the stop mode is displayed. We were able to detect abnormal movements. However, there are electric roll screens to which the encoder detection unit 62 is not attached, such as small products and low-priced products. In this case, it is not possible to detect the falling speed of the roll screen (the rotation speed of the rotary drive unit). As a result, the rotation speed of the rotation motor unit 64 cannot be controlled either. Therefore, in this case, the roll screen is lowered to the lower limit switch LSD by forcibly setting the low speed mode as follows. FIG. 11 shows a flowchart in that case. Note that the following flow charts are for the case where both the device having the encoder detection unit 62 and the device not having the encoder detection unit 62 can share the same.

Referring to FIG. 11, in step 180, it is determined whether or not the encoder detection unit 62 is not set. In the case of a certain setting of the encoder detection unit 62, the control proceeds to step 196, and the ascending / descending operation is performed by the speed control method based on the encoder signal as described above (19
8). When the predetermined lifting and lowering is completed, the operation is stopped and the processing is ended (194).

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

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

When it is determined in step 188 that the signal at the input port 70 has become a low level, a predetermined raising / lowering operation is started (190) and until it is determined that the upper / lower limit switch has operated (192). The ascending / descending operation from step 188 onward is continued. When it is determined that the upper limit / lower limit switch has 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 / descending speed is reduced and the roll screen is moved to the lowest (or highest) position. Lower (rise) and fix it there. As a result, the roll screen does not stop at an intermediate position, and it is possible to prevent damage caused by the fall of the roll screen.

As described above, according to this embodiment, it is possible to confirm whether or not the electromagnetic brake operates normally before the elevating operation is started, not after the electric switchgear starts the elevating operation. it can. After confirming that the electromagnetic brake works normally, the operation moves up and down, so safety can be secured in advance.

If the electromagnetic brake is a direct current and it is checked whether or not the electromagnetic brake works normally by the voltage, the current flowing through the detection 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, in the case of detecting whether or not the electromagnetic brake normally operates based on the current flowing in the DC electromagnetic brake, it is possible to detect more reliably as compared with the method of monitoring the voltage.

The same applies to the case of the AC electromagnetic brake, and when the current flowing in parallel to the AC electromagnetic brake is detected, the current flowing through the detection element can be small. The temperature rise of the element is also small, and the device can be downsized and the cost can be reduced. Further, when directly detecting the current flowing in series with the AC electromagnetic brake, it is possible to more reliably confirm whether or not the electromagnetic brake is normal, as compared with the method of monitoring the parallel current.

Further, the electromagnetic brake is constantly monitored even during the lifting operation, and if an abnormality occurs, the driving of the electromagnetic brake is stopped. It is safer compared to the case where the lifting operation is continued. Also, from the encoder signal during stop mode,
When the lowering operation of the lifting and lowering member of the electric switchgear is detected and the forced low-speed lowering operation is performed, the lifting and lowering member accelerates due to gravity and falls, and the braking operation using the counter electromotive force of the rotary motor. Can be prevented by.
It is possible to reduce the descending speed of the elevating and lowering opening / closing member, and to reduce the risk of damaging a person or an object. In a device not provided with an encoder detection unit, the lower limit switch (LSD) fixes the lifting / lowering opening / closing member to a safe lowest position. Therefore, an accident can be prevented.

Further, at the time of failure, the remote lifting / lowering operation of the lifting / lowering opening / closing member is prohibited by the controller such as the center device, which is distant from the failed electric switchgear. Therefore, it is possible to prevent abnormal operation of the failed electric switchgear. Further, since the electric switchgear operates according to the control signal from the controller which is scheduled to be installed in the immediate vicinity of the electric switchgear, there is no hindrance to work such as inspection, repair and removal.

[Brief description of 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 drive unit according to the first embodiment.

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

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

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

FIG. 7 is a flowchart of a process of prohibiting or permitting an operation depending on a source of a remote signal in the microcomputer of the first embodiment.

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

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

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

FIG. 11 is a flowchart of a process performed by a microcomputer when a roll screen drop is detected without an encoder detection unit.

FIG. 12 shows a conventional electric roll screen device,
It is a circuit diagram showing a drive circuit of a direct-current electromagnetic brake.

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

[Explanation of symbols]

A1 to A9 rotation drive unit K1-K9 Electric roll screen device L1-L9 controller N1-N9 roll screen P1 to P9 control unit 30 microcomputer 54 Position encoder input section 58 Electromagnetic brake drive 62 Encoder detector 66 Electromagnetic brake part

Continuation of the front page (56) Reference JP 62-255384 (JP, A) JP 50-48644 (JP, A) JP 8-254148 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) H02P 7/00 E06B 9/68 E06B 9/80 H02P 3/04

Claims (9)

(57) [Claims] 1. An electric roll screen, an electric romancy
Cord, electric blinds, and other lifting / closing members, and the above-mentioned lifting / lowering device using a rotary drive unit or lifting tape.
An electric motor with an electromagnetic brake, which raises and lowers the closing member, and control means for controlling the electric motor in response to a remote control signal.
And, the electromagnetic brake always fixes the lift opening / closing member,
The brake is released due to the application of the electric current, and the control means activates the electric motor in response to the remote control signal to operate the electric motor.
Before raising / lowering the lifting / lowering opening / closing member, the electromagnetic brake
Detects whether it is normal, and if it is normal, it moves up and down
Even when the electric motor is operating to move up and down the lift opening / closing member, it is monitored whether the electromagnetic brake is normal, and if an abnormality is found, the lift operation is stopped. Electric opening and closing, characterized by including confirmation means
Equipment . 2. The electromagnetic brake is a direct current electromagnetic brake, and the confirmation means determines whether the direct current electromagnetic brake is in a short-circuited state or an open state based on a direct current voltage value applied to the direct current electromagnetic brake. The electric switchgear according to claim 1, including means for confirming that there is no such switch. 3. The electromagnetic brake is a direct-current electromagnetic brake, and the confirmation means does not cause a short-circuit state or an open state of the direct-current electromagnetic brake based on a direct-current value passing through the direct-current electromagnetic brake. The electric switchgear according to claim 1 including means for confirming. 4. The electromagnetic brake is an AC electromagnetic brake, and the confirmation 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, further comprising means for confirming that neither a short-circuited state nor an open state of the AC electromagnetic brake has occurred. 5. The electromagnetic brake is an alternating-current electromagnetic brake, and the checking means does not cause a short-circuited state or an open state of the alternating-current electromagnetic brake based on a current value flowing through the alternating-current electromagnetic brake. The electric switchgear according to claim 1 including means for confirming. 6. An elevating and lowering opening / closing member, an electric motor with an electromagnetic brake for elevating and lowering the elevating and lowering opening / closing member, an open state detection means for detecting an open state of the electromagnetic brake, and the remote control signal in response to the remote control signal. And a control means for controlling an electric motor, wherein the electromagnetic brake always fixes the lifting and lowering opening and closing member,
The brake is released when an electric current is applied, and the control means ends the lifting drive operation when the open state detection means detects that the electromagnetic brake is in a failure state during the lifting operation of the lift opening / closing member. An electric switchgear characterized by: 7. A lifting / lowering opening / closing member, an electric motor with an electromagnetic brake for lifting / lowering the lifting / lowering opening / closing member, a movement detection unit for detecting a movement amount of the lifting / lowering opening / closing member, and a remote control signal in response to the remote control signal. And a control means for controlling an electric motor, wherein the electromagnetic brake always fixes the lifting and lowering opening and closing member,
The brake is released by applying an electric current, and the control means responds to the movement detecting means detecting the movement of the raising / lowering opening / closing member in the stop mode of the raising / lowering opening / closing member. An electric opening / closing device, characterized in that an operation for forcibly lowering the lifting / lowering opening / closing member is performed within a range of a certain amount of movement detected and at a predetermined low speed. 8. An elevating opening / closing member, an electric motor with an electromagnetic brake for raising and lowering the elevating opening / closing member, and control means for controlling the electric motor in response to a remote control signal. Fix the lift opening / closing member,
The brake is released due to the application of the electric current, and the control means forcibly moves the lifting / closing member in response to the movement of the lifting / closing member being detected in the stop mode of the lifting / closing member. An electric switchgear, characterized by performing an operation for lowering to a lowering position. 9. An electric roll screen, an electric roman shade, an electric blind, and other raising / lowering opening / closing members, an electric motor with an electromagnetic brake that raises / lowers the raising / lowering opening / closing members by a rotary drive unit or a lifting tape, and a remote control signal. And a control means for controlling the electric motor, wherein the control means is responsive to a failure state detection means for detecting a failure state of the electromagnetic brake, and a failure state detected by the failure state detection means. A prohibiting means for prohibiting the operation of the electric motor, and a predetermined specific remote control device which is scheduled to be installed at a position where the lifting / closing member is visually recognized after the prohibiting means prohibits the operation of the electric motor. An electric switchgear comprising means for driving the electric motor in response only to a remote signal from the electric motor.