JP2000220366A - Electric blinds - Google Patents

Abstract

(57) [Problem] To provide an electric blind capable of stably preventing problems caused by cutting of a hoisting rope. A slat can be moved up and down by raising and lowering a hoisting line by a driving force of a motor, and a lower limit detecting device for outputting a detection signal when a slack of the hoisting line is detected is provided in a head box. In the electric blind, which can be driven by the operation device 5 via the motor control device 22 and which can stop the operation of the motor 28 based on the detection signal output from the lower limit detection device 33, the motor control device Reference numeral 22 indicates that the operation of the motor 28 can be stopped based on the detection signal of the lower limit detection device 33 at the time of raising and lowering the slat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blind for automatically controlling a slat elevating operation and an angle adjusting operation based on preset values.

[0002]

2. Description of the Related Art In recent years, electric blind control devices for automatically controlling the operation of a large number of electric blinds installed on each floor of a building based on preset programs or operation of operation switches have been put to practical use. I have.

[0003] In such an electric blind, when the slats are pulled up, the slat lifting / lowering motor provided in the head box is operated, and the lifting / lowering tape winding device winds the lifting / lowering tape. As a result, the lifting tape is pulled up, and the slats and the bottom rail are pulled up. When the slat is lowered, the lifting tape is rewound from the lifting tape winding device, and the slat and the bottom rail are lowered.

[0004] In addition, the electric blind as described above includes:
An upper limit switch for stopping the raising operation of the slat when the slat is raised to the upper limit, and a lower limit switch for stopping the lowering operation of the slat when the slat is lowered to the lower limit are provided.

The upper limit switch is disposed, for example, on the lower surface of the head box, and is pressed by the uppermost slat when the slat is pulled up to the upper limit, and stops the operation of the slat lifting / lowering motor based on the pressing operation. It has become.

The lower limit switch is disposed below the head box so as to detect the degree of tension of the lifting tape hanging down from the head box only when the slat is lowered. When the bottom rail descends to the lower limit and is supported by the ladder cord, the elevating tape is loosened. Therefore, the lower limit switch detects the slack of the elevating tape and stops the operation of the slat elevating motor.

The lower limit switch detects the slack of the elevating tape and stops the operation of the slat elevating motor even when the bottom rail comes into contact with some obstacle and cannot be lowered during the lowering operation of the slat. Let it. Therefore, the lower limit switch also operates as an obstacle detection stop unit.

The lower limit switch detects the slack of the elevating tape and stops the operation of the slat elevating motor even when the elevating tape is cut during the lowering operation of the slat.

Japanese Patent Application Laid-Open No. 3-275889 discloses a control device for stopping the operation of a motor when the tension of a lifting cord is excessively large or small.

In this control device, when the bottom rail lowers to the lower limit during the lowering operation of the slat, or when the bottom rail comes into contact with some obstacle and the tension acting on the lifting cord becomes too small, the operation of the motor stops. Is done. Also,
The operation of the motor is also stopped when the lifting cord is cut and the tension acting on the lifting cord becomes too small.

Also, when the slat is raised to the upper limit,
When the tension acting on the lifting cord is excessive, the operation of the motor is stopped, and when the slat or the bottom rail cannot be lifted by some obstacle during the slat lifting operation, the operation of the motor is stopped.

In the electric blind as described above, in the electric blind in which the slat elevating shaft for driving the elevating tape winding device and the slat angle adjusting shaft for driving the ladder cord supporting device have the same axis, FIG. As shown, there is a type in which each slat 39 can be moved up and down only in a state of being substantially vertically rotated.

Further, there is an electric blind in which a slat elevating shaft and a slat angle adjusting shaft are provided independently of each other, in which the slat can be raised and lowered at an arbitrary angle.

[0014]

In the electric blind as described above, since the lower limit switch operates only when the slat is lowered, even if any of the lifting tapes is cut during the slat lifting operation, the slat lifting and lowering switch is used. The operation of the motor is not stopped, and the uncut elevating tape is wound up, for example, only one of the slats and the bottom rail is pulled up to the upper limit and stopped in a one-sided state.

Then, even if the slat is lowered from this state to repair the cut elevating tape, the lower limit switch detects the slack of the cut elevating tape and stops the operation of the slat elevating motor. Therefore, the slat cannot be lowered. Therefore, there is a problem that the repair work of the lifting tape becomes complicated.

In the electric blind disclosed in Japanese Patent Application Laid-Open No. 3-275889, the operation of the slat lifting motor can be stopped even if the lifting cord is cut off during the slat lifting operation. However, since the urging force of the coil spring of the tension sensing unit needs to be set so as to balance the weight of the bottom rail and the slat acting on the lifting and lowering cord, the operation of setting the urging force of the coil spring is complicated, and If the biasing force of the spring is not properly set, there is a problem that a malfunction occurs.

Further, as shown in FIG.
When the slats 39 are lifted and lowered in a state where the slats 39 are rotated in the vertical direction, the lifting tapes 37 are liable to be worn due to friction with the periphery of the insertion hole 45 of each slat 39, which causes cutting of the lifting tapes 37. There is a problem.

An object of the present invention is to provide an electric blind capable of stably preventing problems caused by cutting of a lifting cable.

[0019]

According to the first aspect of the present invention, a multistage slat and a bottom rail are suspended from a head box via a ladder cord, and a lifting cable is inserted into the slat and a lower end of the lifting cable is provided. The bottom rail is suspended and supported, and the slats can be moved up and down by moving up and down the lifting line with the driving force of a motor, and a lower limit for outputting a detection signal to the head box when a slack of the lifting line is detected. A detection device, wherein the motor can be driven by an operation device via a motor control device, and the motor control device can stop the operation of the motor based on a detection signal output from the lower limit detection device. In the blind, the motor control device, based on the detection signal of the lower limit detection device, at the time of raising and lowering the slat. And enabling stops the operation of the motor are.

According to a second aspect of the present invention, the lower limit detecting device comprises a limit switch for projecting a detector at a hanging position of the hoisting line and detecting a slack of the hoisting line with the detector. In the third aspect, the motor control device includes a maintenance mode setting device that invalidates a detection signal output from the lower limit detection device and enables driving of the motor by the operation device.

According to a fourth aspect, the head box includes:
A display device for displaying an abnormality based on the detection signal at the time of the slat lifting operation is provided. In claim 5,
A plurality of slats and bottom rails are suspended and supported from the head box via ladder cords, and a lifting cable is inserted through the slats, and the bottom rail is suspended and supported at the lower end of the lifting cable. The slats can be raised and lowered by raising and lowering the hoisting line, and the angle of the slats can be adjusted via the ladder cord, and the motor is based on slat height and slat angle set values set by an operating device. In the electric blind, which can be driven by a motor control device that operates, the motor control device rotates the slat to a predetermined angle at the time of the slat elevating operation set in advance before the elevating operation based on the set value.

According to a sixth aspect, the predetermined angle is within ± 60 degrees with respect to the horizontal direction. In claim 7, the predetermined angle is such that the angle during the slat lifting operation is closer to the horizontal direction than the angle during the slat lowering operation.

According to the present invention, the operating device can output the set value to a motor control device of a plurality of electric blinds, and the motor control device of each electric blind moves the slats of each electric blind to the slat elevating operation. A synchronous elevating device is provided which starts the elevating operation at the same time based on the set value after rotating to a predetermined angle.

In the ninth aspect, the motor control device includes a slat lifting / lowering motor that rotationally drives a slat lifting / lowering shaft;
A slat angle adjusting motor for rotating and driving the slat angle adjusting shaft can be controlled, and prior to driving the slat elevating shaft based on the set value, the slat angle adjusting shaft is driven to set the slat to a preset slat. It is rotated to a predetermined angle during the elevating operation.

According to a tenth aspect of the present invention, the predetermined angle is an angle when the slat is raised and the angle when the slat is lowered is other than the horizontal direction. Claim 11
In this example, a multi-stage slat and a bottom rail are suspended and supported from a head box via a ladder cord, and a lifting cable is inserted through the slat, and the bottom rail is suspended and supported at a lower end of the lifting cable. The slats can be moved up and down by raising and lowering the hoisting line with a driving force, and the angle of the slats can be adjusted via the ladder cord, and the head box detects a slack of the hoisting line when a detection signal is detected. An output lower limit detection device is provided, and the motor can be driven by a motor control device that operates based on set values of a slat height and a slat angle set by an operation device, and the motor control device is output from the lower limit detection device. In the electric blind in which the operation of the motor can be stopped based on the detection signal, the motor control device includes: At the time of raising and lowering the slat, the operation of the motor can be stopped based on the detection signal of the lower limit detection device, and the slat is set in advance before the slat elevating operation based on the set value. The slat is rotated to a predetermined angle during the elevating operation.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG.
A large number of electric blinds 1 are connected by a common signal line 2 and are grouped into, for example, first to fourth areas A to D for each specific area.

A personal computer 3 is connected to the signal line 2 as a central control device. A program for automatically controlling the blinds 1 in each of the areas A to D is set in the personal computer 3 in advance, and the slat elevating operation and the slat angle adjusting operation of each blind 1 are performed by the personal computer 3 operating based on the program. Automatically controlled.

Area switches 4a to 4d are provided for the first to fourth areas A to D, respectively.
a to 4d are connected to the signal line 2. By operating the area switches 4a to 4d, the slat lifting operation and the slat angle adjusting operation of the electric blind 1 in the corresponding area or the electric blind 1 in another area can be controlled in preference to the control by the personal computer 3. Has become.

A single switch 5 is connected to each of the electric blinds 1. This single switch 5
It is used when operating the corresponding electric blind, all blinds 1 in the area, or blinds 1 in a predetermined group set in the area.

The operation panel 6 of the single switch 5 is shown in FIG.
Shown in On the operation panel 6, an elevating lever 7, a rotating lever 8, a simultaneous key 9, a permission key 10, a prohibition key 11, and a stop key 12 are formed.

The elevating lever 7 is supported on the operation panel 6 so as to be movable in the vertical direction. When the elevating height of the slat is set, the elevating lever 7 is moved up and down to raise and lower the slat. Can be set.

The rotary lever 8 is supported on the operation panel 6 so as to be vertically movable, and is used for setting an angle of a slat. When the rotating lever 8 is positioned at the middle in the vertical direction, the slat is rotated in the horizontal direction, and as the rotating lever 8 is moved upward, the slat is rotated to one side and rotated to the vertical direction. As one moves 8 downward, the slats are rotated to the other and rotated vertically.

The permission key 10 is used when permitting automatic control based on the program set in the personal computer 3, and the prohibition key 11 is used when prohibiting automatic control by the personal computer 3. The stop key 12 is used to stop driving the electric blind 1.

The simultaneous key 9 is used to simultaneously drive the electric blinds 1 in a predetermined group based on the height and angle of the slats set by the lifting lever 7 and the rotating lever 8.

FIG. 3 shows the electrical configuration of each electric blind 1 and the individual switch 5. The operation unit 13 of the single switch 5 is each lever and each key on the operation panel 6, and the operation signal is input to the CPU 14.

The ROM 15 connected to the CPU 14 stores the angle of the slat when the slat is raised and lowered,
When the electric blinds 1 in the group are operated at the same time, data such as a standby time until the shift from the slat rotation operation to the elevating operation is set in advance.

An EEPROM connected to the CPU 14
In 16, area setting data and the like are previously written from the personal computer 3. The setting switch unit 17 connected to the CPU 14 includes a dip switch and the like,
The switch address of the single switch 5 can be set.

Input / output unit 18 connected to CPU 14
Inputs a signal input to the single switch 5 from the outside via the signal line 2 to the CPU 14, and
The signal output from 14 is output to the electric blind 1 via the signal line 2.

The CPU 14 executes a control signal based on a preset program, a signal input from the operation unit 13, data stored in the ROM 15 and the EEPROM 16, and data set by the setting switch unit 17. Is generated, and the control signal is transmitted to the input / output unit 18.
And outputs it to the corresponding electric blind 1 via.

A blind controller 19 is provided in the head box of the electric blind 1. A power supply unit 20 in the blind controller 19 supplies power to each circuit and the motor of the electric blind 1.

The input unit 21 in the blind controller 19 is connected to the CPU 22. The output signal of the single switch 5 is sent to the CPU via the input unit 21.
22.

The LED display unit 23 connected to the CPU 22 drives the light emitting diodes 43a to 43c exposed on the lower surface of the head box as described later, and based on a control signal output from the CPU 22, The light emitting diodes 43a to 43c are turned on.

EEPROM connected to the CPU 22
The area 24 stores area setting data for setting an area to which the electric blind 1 belongs, and upper and lower limits when the slat is raised and lowered.

The setting switch unit 25 connected to the CPU 22 comprises a dip switch exposed on the lower surface of the head box of the electric blind 1 as described later.
The address of the blind, the type of the blind or the maintenance mode can be set. Then, the setting signal is input to the CPU 22.

The input / output unit 26 connected to the CPU 22
Is connected to the input / output unit of another electric blind 1 in the same group via the signal line 2. Then, of the operation signals input to the CPU 22 from the single switch 5, the operation signal of the other electric blind 1 is output from the input / output unit 26 to the input / output unit of the other electric blind 1 via the signal line 2. You. An operation signal output from an input / output unit of another electric blind 1 is transmitted to the CPU 22 via the input / output unit 26.
Is input to

The first motor drive unit 27 connected to the CPU 22 drives a slat lifting / lowering motor 28 provided in the head box based on a motor control signal output from the CPU 22.

The second motor drive unit 29 connected to the CPU 22 drives a slat angle adjusting motor 30 disposed in the head box based on a motor control signal output from the CPU 22.

The encoder 3 connected to the CPU 22
1 converts the rotation of the slat elevating shaft, which is rotationally driven by the slat elevating motor 28 in the head box, into a pulse signal and outputs it to the CPU 22;
The PU 22 counts the number of pulses and detects the rotation angle of the slat elevating shaft.

The upper limit switch 32 connected to the CPU 22 outputs a detection signal to the CPU 22 when the slat is pulled up to the upper limit. The CPU 22
Is connected to the lower limit switch, and detects the slack of the slat lifting tape as described later, and outputs a detection signal to the CPU 22.

In such a blind controller 19, the CPU 22 executes a program set in advance,
An operation signal input from the input unit 21 and the EEPROM 2
4 and the data set in the setting switch unit 25, the slats are moved up and down and the angle is adjusted.

When the slat is raised and lowered to a preset slat height, the CPU 22 stops the operation of the slat lifting motor 28 based on the count of the pulse signal output from the encoder 31.

Further, the CPU 22 stops the operation of the slat lifting / lowering motor in the slat lifting direction based on the detection signal of the upper limit switch 32 during the slat lifting operation. The operation of the slat lifting / lowering motor is stopped based on the detection signal of the limit switch 33.

The specific configurations of the upper limit switch 32 and the lower limit switch 33 will be described with reference to FIGS. A take-up pulley 36 is rotatably supported by a support member 35 disposed in a head box 34 of the electric blind 1, and an upper end portion of a lifting tape 37 serving as a lifting cable is attached to the take-up pulley 36. ing. As shown in FIG. 13, the elevating tape 37 is inserted into the insertion hole 45 of each slat 39, and the bottom rail 46 is suspended from the lower end thereof.

A slat elevating shaft 38 is inserted into the center of the take-up pulley 36 so as not to rotate relatively. The slat elevating shaft 38 is driven to rotate by the slat elevating motor 28. Therefore, when the slat elevating shaft 38 is rotated in the slat elevating direction by the slat elevating motor 28,
The lifting tape 37 is wound on the winding pulley 36,
When the bottom rail 46 and the slat 39 are pulled up and the slat elevating shaft 38 is rotated in the slat descent direction, the elevating tape 37 is rewound from the winding pulley 36,
The bottom rail 46 and the slat 39 are lowered.

A ladder cord 44 is suspended from the support member 35 on the side of the elevating tape 37, and the ladder cord 44 supports a plurality of slats 39, as shown in FIGS. 14 and 15. The bottom rail 46 is connected to the lower end of the ladder cord 44.

The upper end of the ladder cord 44 is attached to a ladder cord support device (not shown) supported by the support member 35, and the ladder cord support device is controlled by the slat angle adjusting motor 30 to adjust the slat angle. It is driven via an adjustment shaft (not shown). Therefore, based on the operation of the slat angle adjusting motor 30, each slat 39 is rotated in the same phase.

The upper limit switch 32 composed of a micro switch is provided on the bottom of the head box 34 on the side of the support member 35.
The detector 32a of the upper limit switch 32 protrudes below the head box 34. When the detector 32a is pressed upward by the uppermost slat 39, the detection signal is output from the upper limit switch 32 to the CPU 22. It has become so.

At the lower side of one side of the support member 35, the lower limit switch 33 composed of a micro switch is provided.
The detector of the lower limit switch 33 is pressed by a slide base 40 movably supported by a support member 35, as shown in FIG.

The slide base 40 is supported movably in the front-rear direction of the head box 34 below the support member 35, and is urged in the direction of arrow A by the urging force of a coil spring (not shown).

At the center of the slide base 40, a guide roller 41 is rotatably supported.
Numeral 7 is guided from the winding pulley 36 to a lower portion of the head box 34 via a guide roller 41.

Therefore, due to the weight of the bottom rail 46 and the slat 39 acting on the lifting tape 37, the slide base 40 is pressed in the direction of arrow B and is positioned as shown in FIG. The detector is pressed.

When the bottom rail 46 is lowered to the lowermost limit, or when it comes into contact with some obstacle and cannot be lowered, the weights of the bottom rail 46 and the slats 39 do not act on the lifting tape 37. Then, the slide base 40 is moved by the arrow A by the urging force of the coil spring.
The lower limit switch 33 is not pressed, and the lower limit switch 33
The detection signal is output at the same time.

Also, when the lifting tape 37 is cut, the lifting tape 37 is attached to the bottom rail 46 and the slat 3.
The weight of 9 no longer works. Also in this case, the detection signal is output from the lower limit switch 33 to the CPU 22.

As shown in FIG. 6, the head box 3
On the lower surface of 4, the setting switch unit 25 includes first to third dip switch groups 42a to 42c. The first dip switch group 42a can set the address and the like of the electric blind 1, the second dip switch group 42b can set the model and the like of the electric blind 1, and the third dip switch group Reference numeral 42c is used when selecting a maintenance mode or the like.

When the maintenance mode is set by the third dip switch group 42c, the CPU 22 sets the upper limit switch 32 and the lower limit switch 33.
Irrespective of the detection signal, the motors 28 and 30 are operated based on the operation signals input from the single switch 5 and the area switches 4a to 4d, and the slats are raised and lowered and the angle is adjusted.

On the side of the dip switch groups 42a to 42c, three light emitting diodes 43a to 43c constituting the LED display section 23 are mounted. The light emitting diodes 43a to 43c are in communication with an abnormality display diode 43a that indicates an operation abnormality of the electric blind 1, and the electric blind 1 is in communication with any one of the individual switches 5, the area switches 4a to 4d, the personal computer 3, and the like. And a power display diode 43c for displaying that power is being supplied to the electric blind 1.
It lights up based on the control signal output from.

Next, the operation based on the operation of the single switch 5 of each electric blind 1 configured as described above will be described. As shown in FIG.
Alternatively, when the setting value of the slat height or the slat angle is changed by operating the rotating lever 8 (step 1), the CPU 14 takes in the newly set slat height and slat angle (step 2).

Next, the CPU 14 detects whether or not the operation of the lifting lever 7 or the rotating lever 8 has been completed (step 3), and if not completed, repeats steps 1 to 3.

Next, the CPU 14 sets another single switch 5
Is detected (step 4), and if so, the transmission of the set value to the blind controller 19 of the electric blind 1 is stopped (step 5). Return to 1.

If it is determined in step 4 that the operation signal from the other single switch 5 has not been input,
The PU 14 detects whether or not the simultaneous key 9 has been pressed (step 6), and proceeds to the next step based on the result.

If the simultaneous key 9 is pressed in step 6, the CPU 14 proceeds to step 1 as shown in FIG.
It is detected whether or not the set value of the slat height is changed by the raising / lowering lever 7 (step 7). If the set value of the slat height is changed, the set value is It is detected whether or not the slat height is further increased (step 8).

In step 8, if the new set value of the slat height is higher than the current slat height, the CPU 14 transmits the slat angle data Su to the blind controller 19 of each electric blind 1 in the same group. (Step 9). The slat angle data Su is used to set the angle of each slat during the slat lifting operation, and is set in a range of ± 60 degrees when the slat in the horizontal state is set to 0 degree.

If the new set value of the slat height is lower than the current slat height in step 8, the CPU 14 transmits the slat angle data Sd to the blind controller 19 of each electric blind 1 in the same group. (Step 10). The slat angle data Sd sets the angle of each slat at the time of the downward movement of the slat. When the slat in the horizontal state is set to 0 degree, the slat angle data Sd is larger than the slat angle data Su within a range of ± 60 degrees. Set by value.

Therefore, for example, the slat angle data Sd during the slat lowering operation is set to 60 degrees, and the slat angle data Su during the slat lifting operation is set to 40 degrees. Next, the CPU 14 waits for a preset T seconds (step 11). This waiting for T seconds
From the state where the current slat angles of the electric blinds 1 in the same group are not uniform, the slat rotation operation is started in each electric blind 1 and the slat angle data Su,
This is to secure a time margin until the electric blind is rotated to the same angle set by Sd. After T seconds, the slat angle of each electric blind 1 is changed to the slat angle data Su, S.
The angles are the same set by d.

Next, the CPU 14 transmits the set values of the slat height and the slat angle taken in Step 2 to the blind controller 19 of each electric blind 1 (Step 12), and returns to Step 1.

If the set value of the slat height has not been changed by the raising / lowering lever 7 in step 7, the CPU 14 proceeds to step 12 and stores only the set value of the slat angle in the blind of each electric blind 1. It transmits to the controller 19 and returns to step 1.

If the simultaneous key 9 has not been pressed in step 6, the CPU 14 performs the operation shown in FIG. That is, steps 13 to 17 in FIG.
Step 11 is omitted from the operation shown in (1), and the transmission operation is performed by one electric blind 1 corresponding to the single switch 5.
Is performed for the blind controller 19.

By such an operation, a similar operation is performed only in one corresponding electric blind 1. Next, the operation of the electric blind 1 that operates based on the operation signal output from the single switch 5 as described above will be described.

As shown in FIG. 10, the CPU 22 in the blind controller 19 of the electric blind 1 first detects whether or not the maintenance mode is set (step 21).

When the maintenance mode is set in the third dip switch group 42c, the CPU 22 determines whether each of the levers 7, 8 of the single switch 5 is irrespective of the input of the detection signals from the upper limit switch 32 and the lower limit switch 33. The slat lifting / lowering motor 28 and the slat angle adjusting motor 30 are rotationally driven only by an operation signal based on the operation of the stop key 12 to perform the slat lifting / lowering operation and the angle adjusting operation (step 22).

If the maintenance mode is not set in step 21, the CPU 22 waits for the input of the angle data Su, Sd or the set value of the slat angle by the rotary lever 8 (step 2).
3, 24).

When the angle data Su or Sd is not input and the set value of the slat angle is input, C
The PU 22 drives the slat angle adjusting motor 30,
The slat is rotated to the set value (step 25).

At step 23, the angle data Su,
Upon detecting any input of Sd, the CPU 22 takes in the input angle data Su or Sd (step 26).

Next, the CPU 22 determines the angle data Su, S
d is detected (step 27), and
When the angle data Su is input, the slats are raised, and when the angle data Sd is input, the slats are lowered.

In step 27, when the angle data Su at the time of the slat lifting operation has been input, as shown in FIG.
To rotate the slats to a predetermined angle within ± 60 degrees (step 28).

Next, the CPU 22 fetches the set values of the slat height and the slat angle output from the single switch 5 in step 12 or step 17 (step 29), and first drives the slat lifting / lowering motor 28 to rotate in the slat lifting direction. (Step 30).

Next, the CPU 22 determines whether or not a detection signal has been input from the upper limit switch 32 (step 3).
1) It is detected whether a pulse signal is input from the encoder 31 (step 32).

In step 31, when the detection signal is being input from the upper limit switch 32, since the slat has been pulled up to the upper limit, the CPU 22 stops the operation of the slat lifting / lowering motor 28 (step 3).
8) Return to step 21.

In the state where the detection signal is not input from the upper limit switch 32 in step 31 and the pulse signal is not input from the encoder 31 in step 32, the slat cannot be pulled up due to some trouble. Fault indication diode 4
3a is turned on (step 37), the operation of the slat elevating motor 28 is stopped (step 38), and the process returns to step 21.

In steps 31 and 32, the slat 3
9 has not been raised to the upper limit and the slat elevating shaft 38 is rotating normally, the CPU 2
2 waits for N seconds (step 33), and then detects whether a detection signal of the lower limit switch 33 has been input (step 34).

In step 34, when the detection signal of the lower limit switch 33 is inputted, the slat 39
In this case, the lifting tape 37 is loosened during the lifting operation, and the lifting tape 37 may be cut. In this case, the CPU 22 turns on the abnormality indicating diode 43a (step 37), stops the operation of the slat lifting / lowering motor 28 (step 38), and returns to step 21.

The purpose of the standby operation for N seconds in step 33 is to perform the lifting operation from the state in which the slats 39 have been lowered to the lowermost limit, so that the bottom rail 46 is slightly pulled up and lowered by the weight of the bottom rail 46. Lower limit switch 33 until tape 37 is securely tensioned
Is not input to prevent abnormal stop of the slat pull-up operation during normal operation.

Next, the CPU 22 detects whether or not a stop signal is input from the single switch 5 when the stop key 12 is pressed (step 35). If the stop signal has been input, the operation of the slat lifting / lowering motor 28 is stopped (step 38), and
Return to 1.

If the stop signal has not been input, the CPU 22 determines whether or not the slat 39 has been pulled up to the height of the set value set by the raising / lowering lever 7 in accordance with the pulse signal output from the encoder 31. The determination is made by counting the number of pulses (step 36).

If the slat has been pulled up to the set value, the operation of the slat lifting / lowering motor 28 is stopped (step 39). If the slat has not yet been raised to the set value, the operations of steps 31 to 36 are repeated.

When the slat is raised to the set value, C
The PU 22 drives the slat angle adjusting motor 30,
The slat is rotated by the rotation lever 8 to the set angle (steps 40 and 41). When the slat is rotated to the set angle, the operation of the slat angle adjusting motor 30 is stopped (step 42), and the process returns to step 21.

In step 27, when the angle data Sd during the slat lowering operation has been input, as shown in FIG. 12, the CPU 22 drives the slat angle adjusting motor 30 to move the slat to a predetermined angle within ± 60 degrees. Rotate to an angle (step 43).

Next, the CPU 22 fetches the set values of the slat height and the slat angle output from the single switch 5 in step 12 or step 17 (step 44), and first rotates the slat lifting / lowering motor 28 in the slat descent direction. (Step 45).

Next, the CPU 22 determines whether or not a detection signal has been input from the lower limit switch 33 (step 4).
6) It is detected whether a pulse signal is input from the encoder 31 (step 47).

In step 46, when the detection signal is being input from the lower limit switch 33, the slat 39 is lowered to the lower limit, the bottom rail cannot be lowered by some obstacle, or the lifting tape Since 37 is cut, C
The PU 22 stops the operation of the slat lifting / lowering motor 28 (Step 52).

If the detection signal is not input from the lower limit switch 33 in step 46 and the pulse signal is not input from the encoder 31 in step 47, the slat 39 cannot be lowered due to some trouble. Turns on the abnormality display diode 43a (step 50), stops the operation of the slat lifting / lowering motor 28 (step 51), and returns to step 21.

In steps 46 and 47, the slat 3
If the stop key 9 has not been lowered to the lower limit and the slat elevating shaft 38 has been rotated normally, the CPU 22 determines whether or not a stop signal has been input from the single switch 5 by pressing the stop key 12. Detect (Step 4
8). If the stop signal has been input, the operation of the slat lifting / lowering motor 28 is stopped (step 51), and the process returns to step 21.

If the stop signal has not been input, the CPU 22 determines whether or not the slat 39 has dropped to the height of the set value set by the lifting / lowering lever 7 in accordance with the pulse signal output from the encoder 31. The determination is made by counting the number of pulses (step 49).

If the slat has dropped to the set value, the operation of the slat lifting / lowering motor 28 is stopped (step 52). If the slat 39 has not yet fallen to the set value, the operations of steps 46 to 49 are repeated.

When the slat 39 falls to the set value, C
The PU 22 drives the slat angle adjusting motor 30,
The slat 39 is rotated by the rotation lever 8 to the set angle (steps 53 and 54). And slat 39
Is rotated to the set angle, the operation of the slat angle adjusting motor 30 is stopped (step 55), and the process returns to step 21.

With the electric blind constructed as described above, the following operational effects can be obtained. (1) When the height and angle of the slat 39 are set by the single switch 5, the slat height and slat angle of the plurality of electric blinds 1 in the group to which the single switch 5 belongs can be controlled collectively.

(2) When the height and the angle of the slat 39 are set by the single switch 5, the slat height and the slat angle of one electric blind 1 corresponding to the single switch 5 can be controlled.

(3) Even when the slat is raised, the lower limit switch 33 detects the slack of the lifting tape 37, and the operation of the slat lifting motor 28 can be stopped. Therefore, if the lifting tape 37 is cut during the slat lifting operation, the operation of the slat lifting / lowering motor 28 is immediately stopped, and troubles such as the slat 39 lifting up can be prevented.

(4) The lower limit switch 33 may be configured to detect whether the lifting tape 37 is tensioned by the weight of the bottom rail 46 and the slats 39 based on the movement of the slide base 40. The mechanical installation conditions such as the biasing force of the spring are mild, and the loosening and cutting of the lifting tape 37 can be detected stably.

(5) When the operation of the slat elevating motor is stopped based on the cutting of the elevating tape 37 during the lifting operation of the slat 39, the abnormality indicating diode 43 exposed on the lower surface of the head box 34 of the electric blind 1
Since “a” is turned on, it is possible to easily confirm the presence or absence of an abnormality.

(6) When the slat 39 is pulled up, the slat lifting motor 2
After the operation of the switch 8 is stopped, when the maintenance mode is set by the third dip switch group 42c, the slat lifting / lowering motor 28 is operated by operating the single switch 5, and the slat 39 of the electric blind 1 is raised / lowered. be able to. Therefore, even after the operation of the slat elevating motor 28 is stopped by cutting the elevating tape 37, the upper limit switch 32 and the lower limit switch 33
Irrespective of the state, the slats 39 can be raised and lowered by operating the single switch 5, and the repair work of the lifting tape 37 can be easily performed.

(7) When the slat 39 is moved up and down, FIG.
As shown in FIG. 3, each slat 39 can be rotated within a range of ± 60 degrees from the horizontal direction prior to the elevating operation, and thereafter the slat 39 can be elevated. Therefore, the friction between the lifting tape 37 and the slat insertion hole 45 during the lifting operation of the slat 39 can be reduced, and cutting due to wear of the lifting tape 37 can be prevented.

(8) The angle of the slat 39 at the time of the raising operation is closer to the horizontal direction than the angle at the time of the lowering operation.
Since the friction between the lifting tape 37 and the insertion hole 45 of the slat 39 is larger during the lifting operation than during the lowering operation of the slat 39, when the slat 39 is raised, the angle is closer to the horizontal direction than during the lowering operation. Wear of the lifting tape 37 can be reliably reduced.

(9) During the lowering operation of the slat 39, the angle of the slat 39 is set not within the horizontal direction but within ± 60 degrees with respect to the horizontal direction. When the lowering operation is performed with the slats 39 in the horizontal direction, as shown in FIG. 14, the edges of the slats 39 may be caught on the warp of the ladder cord 44, and the angles of the slats 39 may be uneven. In this embodiment, since the lowering operation is performed with the slat 39 tilted, as shown in FIG. 15, the edge of the slat 39 and the warp of the ladder cord 44 are prevented from being caught, and the angle of each slat 39 is reduced. The lowering operation can be performed in a state in which are aligned.

(10) When a plurality of electric blinds 1 in the same group are moved up and down at the same time, from the start of the rotation operation of the slats 39 of each electric blind 1 to the rotation of the electric blinds to a predetermined angle during the up / down operation. After waiting for T seconds longer than the time required for the slat, the slat elevating operation can be started. Therefore, even when the slat angles of the respective electric blinds 1 are not uniform when starting the elevating operation of the slats 39, the slats of the respective electric blinds 1 are rotated after rotating the slats of the respective electric blinds 1 at the same angle. Can be started all at once, so each electric blind 1
Slats 39 with the height of the bottom rails 46 aligned
Can be performed. As a result, the appearance at the time of the slat elevating operation can be improved.

(11) If an operation signal is transmitted from another single switch 5 to the electric blind 1 before an operation signal for raising / lowering operation is transmitted from the single switch 5 to the electric blind 1, the individual blind 5 The transmission of the operation signal from the switch 5 can be stopped. Therefore, each electric blind 1 can be operated based on the earliest operation signal among the operation signals input from the plurality of independent switches 5.

The above embodiment can be modified as follows. The lifting tape 37 may be a lifting cord, a lifting cord, or the like. A common motor is used for the slat elevating motor 28 and the slat angle adjusting motor 30, and the driving force of the motor can be selectively supplied to either the slat elevating shaft or the slat angle adjusting shaft via a clutch device. Alternatively, the slat lifting operation and the slat rotating operation may be performed independently. The slat angle during the slat lifting operation may be the same as the slat angle during the slat lowering operation.

[0118]

As described in detail above, the present invention can provide an electric blind which can prevent a trouble caused by cutting of a hoisting rope in advance and stably.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a control device for an electric blind.

FIG. 2 is a front view showing an operation panel of a single switch.

FIG. 3 is a block diagram showing an electrical configuration of a single switch and an electric blind.

FIG. 4 is a front view showing the elevating tape winding device.

FIG. 5 is a longitudinal sectional view showing the elevating tape winding device.

FIG. 6 is a bottom view of a head box showing a dip switch group and light emitting diodes.

FIG. 7 is a flowchart illustrating the operation of a single switch.

FIG. 8 is a flowchart illustrating the operation of a single switch.

FIG. 9 is a flowchart illustrating the operation of a single switch.

FIG. 10 is a flowchart showing the operation of the electric blind.

FIG. 11 is a flowchart showing the operation of the electric blind.

FIG. 12 is a flowchart showing the operation of the electric blind.

FIG. 13 is a perspective view showing a slat elevating operation of the electric blind.

FIG. 14 is a side view showing a slat lowering operation of the electric blind.

FIG. 15 is a side view showing a slat lowering operation of the electric blind.

FIG. 16 is a perspective view showing a slat elevating operation of the electric blind.

[Explanation of symbols]

Reference Signs List 1 electric blind 5 operating device (single switch) 22 motor control device (CPU) 28 motor (slat elevating motor) 30 motor (slat angle adjusting motor) 33 lower limit detecting device (lower limit switch) 34 head box 37 hoisting rope ( Elevating tape) 39 Slats 44 Ladder code 46 Bottom rail

Claims (11)

[Claims] A slat and a bottom rail are suspended from a head box via a ladder cord, and a plurality of slats and bottom rails are supported by the slats. The slats can be raised and lowered by raising and lowering the lifting cable with the driving force of a motor, and the head box is provided with a lower limit detection device that outputs a detection signal when detecting slack of the lifting cable, and the motor is operated. An electric blind, which can be driven by a device via a motor control device, and wherein the motor control device can stop the operation of the motor based on a detection signal output from the lower limit detection device, wherein the motor control device includes: At the time of raising and lowering the slat, the operation of the motor is stopped based on the detection signal of the lower limit detecting device. Electric blind, characterized in that the capacity. 2. The lower limit detecting device according to claim 1, wherein said lower limit detecting device comprises a limit switch which projects a detector at a hanging position of said hoisting line and detects slack of said hoisting line with said detector. Electric blinds. 3. The motor control device according to claim 1, further comprising a maintenance mode setting device that invalidates a detection signal output from the lower limit detection device and enables driving of the motor by the operation device. Item 3. The electric blind according to any one of Items 1 to 2. 4. The head box is provided with a display device for performing an abnormality display based on the detection signal at the time of the slat pulling operation.
The electric blind according to any one of the above. 5. A plurality of slats and a bottom rail are suspended from a head box via a ladder cord, and a lifting cable is inserted into the slat, and the bottom rail is suspended and supported at a lower end of the lifting cable. The slats can be raised and lowered by raising and lowering the lifting cable with the driving force of a motor, and the angle of the slats can be adjusted via the ladder cord, and the slat height and the slat angle set by an operating device are provided. In the electric blind, which can be driven by a motor control device that operates based on the set value, the motor control device sets the slat at a predetermined slat elevating operation before and after the elevating operation based on the set value. An electric blind characterized by being rotated to an angle. 6. The predetermined angle is ± 60 with respect to a horizontal direction.
The electric blind according to claim 5, wherein the electric blind is within a degree. 7. The electric blind according to claim 6, wherein the predetermined angle is such that an angle during a slat lifting operation is closer to a horizontal direction than an angle during a slat lowering operation. 8. The operating device is capable of outputting the set value to a motor controller of a plurality of electric blinds, and the motor controller of each of the electric blinds moves a slat of each of the electric blinds to a predetermined position during the slat elevating operation. The electric blind according to any one of claims 5 to 7, further comprising a synchronous elevating device that starts an elevating operation at the same time based on the set value after being rotated by an angle. 9. The slat lifting / lowering motor that rotationally drives a slat lifting / lowering axis and a slat angle adjusting motor that rotationally drives a slat angle adjusting axis, and controls the slat lifting / lowering based on the set value. 6. The electric blind according to claim 5, wherein, prior to driving the shaft, the slat angle adjusting shaft is driven to rotate the slat to a predetermined angle at the time of a slat elevating operation. 10. The apparatus according to claim 5, wherein the predetermined angle is a horizontal angle when the slat is raised and an angle other than the horizontal angle when the slat is lowered.
The described electric blind. 11. A multi-stage slat and a bottom rail are suspended and supported from a head box via a ladder cord,
The slat is inserted with a lifting cable, and the bottom rail is suspended and supported at the lower end of the lifting cable. The head box is provided with a lower limit detecting device that outputs a detection signal when detecting slack of the hoisting line, and the motor has a slat height and a slat angle set by an operating device. An electric blind, which can be driven by a motor control device that operates based on a set value, wherein the motor control device can stop the operation of the motor based on a detection signal output from the lower limit detection device. When the slat is raised and lowered, the device is configured to perform the mode based on the detection signal of the lower limit detection device. An electric blind characterized in that the operation of the slat can be stopped and the slat is rotated to a predetermined angle at the time of the slat elevating operation set in advance before the slat elevating operation based on the set value.