JP7531385B2 - Vertical blinds - Google Patents

Description

This invention relates to vertical blinds with two rows of slats suspended in parallel, one at the front and one at the back.

Vertical blinds have slats suspended from a number of runners that are supported movably within a clothes rail, each of which has adjustable angles. In typical vertical blinds, the amount of light entering the room is adjusted by pulling the slats out along the clothes rail and adjusting the angle of the slats manually or electrically.

The slats of vertical blinds are made of a drape fabric with light blocking properties or a lace fabric with semi-transparency.For example, there is a vertical blind that appropriately prevents light leakage when the tilt angles of the slats that are alternately suspended and have different rotation speeds are adjusted using an external operation terminal such as a remote control (see Patent Document 1).

Patent Publication No. 2010-150883

In recent years, vertical blinds have been equipped with two mechanisms, an outdoor mechanism and an indoor mechanism,
There are two types in which the slats are suspended in parallel in two rows, front and back.

As shown in Fig. 20, this type of vertical blind is equipped with an outdoor mechanism 101 that controls the operation of slats 101a made of semi-translucent lace fabric, and an indoor mechanism 102 that controls the operation of slats 102a made of drape fabric with light blocking properties, and these mechanisms 101, 102 are arranged side by side. In this case, if the two rows of slats 101a and 102a in the front and rear come into contact with each other, it may cause damage or equipment failure.
As shown in FIG. 1B, the outdoor mechanism section 101 and the indoor mechanism section 102 must be spaced apart by at least a specified distance, which results in a problem of the device itself becoming larger.

Furthermore, as shown in Figure 20 (c), when the outdoor slat 101a is fully closed and the indoor slat 102a is fully open, a large gap is created between the slats 101a, 102a, making it impossible to properly adjust the amount of light entering the room and also resulting in a poor design.

Furthermore, if the distance between the outdoor mechanism unit 101 and the indoor mechanism unit 102 is reduced simply in order to make the device smaller, the slats 101a, 102a, which are arranged in two parallel rows, front and back, will come into contact with each other when they rotate, causing a malfunction.

The present invention has been made in consideration of the above-mentioned problems, and provides a vertical blind in which slats are suspended in parallel in two rows, one at the front and one at the back, which improves the size and design of the device while also appropriately preventing the slats from coming into contact with each other.

In order to achieve the above-mentioned object, the present invention provides a vertical blind in which first slats and second slats are suspended in parallel in two rows, one before and one after the other, comprising a first rail-shaped housing for horizontally movingly supporting a plurality of runners that rotatably suspend and support the first slats, and a second rail-shaped housing arranged in parallel at a predetermined interval to the first rail-shaped housing for horizontally movingly supporting a plurality of runners that rotatably suspend and support the second slats, wherein the first slats and the second slats have an interference area in which they may interfere with each other when they rotate, and the predetermined interval is a interval in which the first slats and the second slats do not abut when one of the first slats or the second slats is in a fully closed state and the other slat is in a fully open state.

In this vertical blind, it is preferable that the first rail-shaped housing is accommodated along the longitudinal direction of the rail within the first hanger rail which constitutes the outer frame body, and the second rail-shaped housing is accommodated along the longitudinal direction of the rail within the second hanger rail which constitutes the outer frame body.

In this vertical blind, the first rail-shaped housing and the second rail-shaped housing are
It is preferable that the clothes hanger be housed along the longitudinal direction of the rail within the hanger rail which serves as the outer frame of the clothes hanger.

In order to achieve the above-mentioned object, the present invention provides a vertical blind comprising a first rail-shaped housing for horizontally movingly supporting a plurality of runners that rotatably suspend and support a first slat, and a second rail-shaped housing for horizontally movingly supporting a plurality of runners that rotatably suspend and support a second slat, wherein the first rail-shaped housing and the second rail-shaped housing are arranged in close proximity to each other so as to form a right angle, and when the first slats and the second slats rotate, the first slats arranged on the end side of the first rail-shaped housing and the second slats arranged on the end side of the second rail-shaped housing have an interference area in which they may interfere with each other, and when the first slats and the second slats are in a fully closed state, the first slats and the second slats do not abut against each other.

In this vertical blind, it is preferable that the vertical blind further includes a receiving unit that receives an angle adjustment signal for adjusting the tilt angle of the first slat and the second slat from an external operation terminal, a first tilt angle detection unit that detects the tilt angle of the first slat, a second tilt angle detection unit that detects the tilt angle of the second slat, a determination unit that, upon receiving the angle adjustment signal, determines whether or not the first slat and the second slat will pass through the interference possible area based on the tilt angles of the first slat and the second slat obtained from the first tilt angle detection unit and the second tilt angle detection unit, and if it is determined that the first slat or the second slat will pass through the interference possible area, controls the rotation of the first slat or the second slat first so that the first slat or the second slat will move out of the interference possible area, a tilt angle control unit that controls the rotation of the first slat and the second slat based on an instruction from the determination unit, and a motor drive unit that rotates the first slat and the second slat based on a control signal from the tilt angle control unit.

In this vertical blind, it is preferable that the judgment unit makes the judgment by referring to table information stored in a memory unit and prepared in advance, or by using an arithmetic formula including pre-defined tilt angles of the first slat and the second slat.

In order to achieve the above object, the present invention provides a slat control method for use in a vertical blind in which first slats and second slats are suspended and supported in parallel in two rows, front and rear, the method including a receiving step of receiving an angle adjustment signal for adjusting a tilt angle of the first slat and the second slat from an external operation terminal when the first slat and the second slat have an interference possible area where they may interfere with each other when rotating and when one of the first slat and the second slat is in a fully closed state and the other slat is in a fully open state, the first slat and the second slat are spaced apart so as not to come into contact with each other, a first tilt angle detection step of detecting the tilt angle of the first slat, and a second tilt angle detection step of detecting the tilt angle of the second slat. The method includes a detection step, a determination step in which, upon receiving the angle adjustment signal, a determination is made as to whether or not the first slat and the second slat will pass through the interference area based on the tilt angles of the first slat and the second slat obtained in the first tilt angle detection step and the second tilt angle detection step, and if it is determined that the first slat or the second slat will pass through the interference area, a tilt angle control step in which the first slat and the second slat are rotated first so as to move out of the interference area, based on an instruction in the determination step, and a motor drive step in which the first slat and the second slat are rotated based on a control signal in the tilt angle control step.

In order to achieve the above object, the present invention provides a program for controlling a vertical blind in which first slats and second slats are suspended and supported in parallel in two rows, front and rear, the program including a receiving step of receiving an angle adjustment signal for adjusting the tilt angle of the first slat and the second slat from an external operation terminal when the first slat and the second slat have an interference area where they may interfere with each other when rotating and when one of the first slats or the second slats is in a fully closed state and the other slat is in a fully open state, the first slat and the second slat are spaced apart so as not to come into contact with each other, a first tilt angle detection step of detecting the tilt angle of the first slat, and a second tilt angle detection step of detecting the tilt angle of the second slat. The method includes a tilt angle detection step, a determination step for determining, upon receiving the angle adjustment signal, whether or not the first slat and the second slat will pass through the interference area based on the tilt angles of the first slat and the second slat obtained in the first tilt angle detection step and the second tilt angle detection step, and if it is determined that the first slat or the second slat will pass through the interference area, a tilt angle control step for controlling the rotation of the first slat and the second slat based on an instruction in the determination step, and a motor drive step for rotating the first slat and the second slat based on a control signal in the tilt angle control step.

The vertical blind according to the present invention includes a first hanger rail for supporting a plurality of runners that suspend and support the first slats in a rotatable manner, and a second rail-shaped housing arranged in parallel with the first rail-shaped housing at a predetermined interval, and for supporting a plurality of runners that suspend and support the second slats in a rotatable manner, so as to be horizontally movable. When the first slats and the second slats rotate,
The vertical blind according to the present invention has an interference area where they may interfere with each other, and the predetermined interval is a interval where the first slat and the second slat do not come into contact with each other when one of the first slat and the second slat is in a fully closed state and the other slat is in a fully open state. With this configuration, the vertical blind according to the present invention can be made compact and its design can be improved.

1 is a perspective view of a vertical blind according to a first embodiment of the present invention. FIG. 2A is a partially transparent plan view of the same vertical blind, and FIG. 2B is a partially transparent side view of the same vertical blind. 4A and 4B are explanatory diagrams of a predetermined interval in the vertical blind. 1A is a partially see-through plan view of a first stage of a vertical blind according to a second embodiment of the present invention, FIG. 1B is a partially see-through plan view of a second stage of the same vertical blind, and FIG. FIG. 2A is a cross-sectional side view of the same vertical blind; FIG. 2B is a cross-sectional side view of the same vertical blind having another hanger rail; FIG. 2A is a perspective view of a bracket and a bracket plate provided on the vertical blind; FIG. 2B is a perspective view of a housing portion of the vertical blind; 13A and 13B are reference diagrams of a remote control used for the vertical blind. FIG. 2 is a functional block diagram of the vertical blind. 1A is an explanatory diagram of the vertical blind in an extended state, FIG. 1B is an explanatory diagram of the rotational movement of slats provided on the vertical blind, and FIG. 1C is an explanatory diagram of the rotational movement of slats provided on the vertical blind. FIG. 2A is an explanatory diagram of the vertical blind in an extended state, and FIG. 2B is an explanatory diagram of a remote control provided on the vertical blind and a rotating operation of the slats. 4A to 4C are explanatory diagrams of the rotational operation of the remote control and the slats. 10 is a flowchart showing an operation procedure of the vertical blind according to the second embodiment of the present invention. FIG. 13 is an explanatory diagram of a remote control used for a vertical blind according to a first modified example of the second embodiment. 4A and 4B are explanatory diagrams of the rotational movement of the slats provided in the vertical blind. FIG. 11 is a perspective view of a vertical blind according to a third embodiment of the present invention. FIG. 2 is an explanatory diagram of a right-angled corner portion of the vertical blind. FIG. 2 is a partially transparent plan view of the first stage of the vertical blind. 13A and 13B are reference diagrams of a remote control used for the vertical blind. 5A to 5D are explanatory diagrams of the rotational movement of the slats provided in the vertical blind. 1A is an explanatory diagram of a slat provided in a conventional vertical blind, FIG. 1B is a side view of a mechanism provided in the same vertical blind, and FIG. 1C is an explanatory diagram of the tilt operation of the same slat.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Vertical blinds according to embodiments of the present invention will now be described with reference to the drawings.

(Embodiment 1)
First, the structure of the vertical blind according to the present embodiment 1 will be described with reference to Fig. 1 to Fig. 3. In the vertical blind 1 according to the present embodiment 1, as shown in Fig. 1, a first hanger rail (first rail-shaped housing) 3A fixed horizontally to a ceiling surface or the like via brackets 2a and arranged on the outside of the room, and a second hanger rail (second rail-shaped housing) 3B fixed horizontally to a ceiling surface or the like via brackets 2b and arranged on the inside of the room are installed in two rows, front and rear, in parallel with each other.

Brackets 2a and 2b are plate-like members, and are fixed to the top surface or the like with screws through holes (not shown) formed in the approximate centers. As described below, protrusions are formed on the top surfaces of hanger rails 3A and 3B, and these protrusions engage with claws formed on both ends of the lower surfaces of brackets 2a and 2b, thereby fixing hanger rails 3A and 3B to the top surfaces.
A plate-shaped bracket plate 2c is disposed between 2b and the top surface to maintain a predetermined distance between the first hanger rail 3A and the second hanger rail 3B.

As shown in Figure 2, the first hanger rail 3A and the second hanger rail 3B accommodate a plurality of runners 4 which are supported so as to be horizontally movable along the longitudinal direction of the rail, and the first slats 5a and the second slats 5b are suspended vertically from the lower ends of the runners 4.

Each runner 4 has a through hole through which a tilt shaft 6 having three splines is rotatably inserted, and both ends of the tilt shaft 6 are rotatably supported in the horizontal direction by an operating part 3c and an end cap 3d attached to both ends of the hanger rails 3A, 3B.

A suspension shaft 41 for suspending and supporting the first slat 5a and the second slat 5b is rotatably supported on each runner 4, and a hook (not shown) is provided on the lower end of the suspension shaft 41.
The first slat 5a and the second slat 5b are attached to the hooks via slat hangers 5c.

An operating rod (operating device) 7 is suspended from one end of the hanger rails 3A, 3B, and when the operating rod 7 is manually rotated, the tilt shaft 6 is rotated via a gear mechanism (not shown) disposed in the operating section 3c. The rotation of the tilt shaft 6 rotates the suspension shaft 41 of each runner 4, and together with this rotation, the suspended slats 5a, 5b are rotated.

The operating cord 8 hanging down from the operating part 3c on one end side of the hanger rails 3A and 3B is
The hanger rails 3A and 3B are arranged so as to be able to go around the hanger rails 3A and 3B, and are attached to the leading runners 4a and 4b of the runners 4, for example, the leading runners 4a and 4b closest to the operating section 3c.
The runners 4 are connected at c, and the pitch distance between each runner 4 is set.

Therefore, when the leading runners 4a, 4b are moved by operating the operating cord 8, the following runners 4 are successively pulled out following the leading runners 4a, 4b, or the following runners 4 are successively pushed back by the leading runners 4a, 4b. By such an operation, the slats 5a, 5b suspended from each runner 4 are pulled out along the longitudinal direction of the hanger rails 3A, 3B, or are folded into the other end side of the hanger rails 3A, 3B. Such horizontal movement control of the runners 4 and tilting (rotating) operation of the slats 5a, 5b can also be realized by mechanical control using a built-in motor, which will be described later.

In the first embodiment, the first slat 5a is made of, for example, a semi-transparent lace material that transmits a part of light, and the second slat 5b is made of, for example, a drape material that blocks light. For example, the width of the slats 5a and 5b is 100 mm, the pitch distance between adjacent runners 4 is about 90 mm, and the pitch distance between the slats 5a and 5b in the longitudinal direction of the rail is 45 mm.
m.

Next, the above-mentioned first hanger rail 3A and second hanger rail 3B are described with reference to FIG.
The tilt angle of the first slat 5a of the first hanger rail 3B is 90 degrees when the hanger rail 3A is fully open, and the tilt angle of the second slat 5b of the second hanger rail 3B is 90 degrees when the hanger rail 3A is fully open.
This is the distance (the distance just before contact) at which the first slat 5a and the second slat 5b do not come into contact with each other when one of the first slat 5a and the second slat 5b is in a fully closed state and the other slat is in a fully open state. Specifically, this is the distance at which the first slat 5a and the second slat 5b do not come into contact with each other when the first slat 5a of the first hanger rail 3A is in a fully closed state and the second slat 5b of the second hanger rail 3B is in a fully open state as shown in Fig. 3(b). Note that the fully closed state refers to a state where the tilt angle of the slats 5a and 5b is 0 degrees (more precisely, about 3 degrees when mechanical contact is taken into account).
The fully open state refers to a state in which the tilt angle of the slats 5a, 5b is 90 degrees. In other words, the fully closed state is a state in which the tilt angle is such that the amount of light taken in from the outside is minimal. In other words, the fully open state is a state in which the tilt angle is such that the amount of light taken in from the outside is maximal. The predetermined intervals are shown in FIG. 3.
In the case shown in (b), the gap may be such that there is no contact when the first slat 5a is in the fully open state and the second slat 5b is in the fully closed state (a gap just before contact).

Next, the possible interference area will be described. When the distance between the first hanger rail 3A and the second hanger rail 3B is the above-mentioned predetermined distance, when the first slat 5a and the second slat 5b rotate, there is an interference spatial area where they may interfere (contact) with each other. This possible interference area is an area that constantly changes depending on the relationship between the tilt angles of the first slat 5a and the second slat 5b.

As described above, the vertical blind 1 according to the first embodiment includes a first hanger rail 3A for supporting a plurality of runners 4 rotatably supporting the first slats 5a in a suspended manner in two rows, front and rear, in parallel, and a second rail-shaped housing 3B for supporting a plurality of runners 4 rotatably supporting the second slats 5b in a horizontally movable manner, which is arranged in parallel with the first rail-shaped housing 3A at a predetermined interval, in parallel with the first rail-shaped housing 3A, in a horizontally movable manner. Also, when the first slats 5a and the second slats 5b rotate, there is an interference area where they may interfere with each other. With this configuration, the vertical blind 1 according to the first embodiment includes a vertical blind 1 for supporting a plurality of slats 5a, 5b in a suspended manner in parallel in two rows, front and rear.
It is possible to reduce the size of the device and improve its design.

(Embodiment 2)
Next, the structure of a vertical blind according to a second embodiment will be described with reference to Fig. 4 and Fig. 12. Note that in the second embodiment, the same components as those of the vertical blind 1 according to the first embodiment will be given the same names and symbols, and detailed descriptions thereof will be omitted.

In the second embodiment, as shown in FIG. 4, tilt motors 9a and 9b for rotating tilt shafts 6a and 6b are built into one end of hanger rails 3A and 3B, respectively.
When the tilt motor 9a is rotated, the tilt shaft 6a is rotated via a gear mechanism (not shown) disposed in the operation unit 3c, and when the tilt motor 9b is rotated, the tilt shaft 6b is rotated via a gear mechanism disposed in the operation unit 3c. Then, with the rotation of the tilt shafts 6a, 6b, the suspension shafts 41 of the runners 4 are rotated, and the slats 5a, 5b suspended and supported by the runners 4 are turned.

As shown in FIG. 5, each runner 4 is formed with a first insertion hole 42 through which the tilt shafts 6a and 6b are rotatably inserted. In addition, the drive shaft 10 is formed with a spiral groove.
A second insertion hole 42 through which the drive shafts 1a and 10b are rotatably inserted is formed.
One end of each of the hanger rails 3A and 3B is attached to an end cap 3
The leading runners 4a, 4b are supported horizontally and rotatably at the bearings 4b. A receiving member having three spiral projections is disposed on the leading runners 4a, 4b, which are positioned at the front, and these spiral projections fit into grooves in the drive shafts 10a, 10b. When the drive shafts 10a, 10b are rotated by the first induction motor 11a and the second induction motor 11b, the leading runners 4a, 4b advance forward and backward in a manner similar to that of a screw feed.

As shown in FIG. 4(a), a tilt shaft 6a is provided inside the hanger rails 3A and 3B.
tilt encoders (tilt angle detectors) 12a, 12b for detecting the amount of rotation of the drive shafts 10a, 10b; induction motors 11a, 11b for rotating the drive shafts 10a, 10b;
Induction encoders 13a, 13b for detecting the amount of rotation of slats 10a, 10b, a power supply board 14, and a control board (control unit) 1 for controlling the induction operation and opening/closing operation (rotation operation) of slats 5a, 5b.
5 is housed in the power supply board 14. The power supply board 14 is connected to an AC power source (AC 100V) via a power cord 14a shown in Fig. 4(a) and supplies power to the control board 15 and the like. By connecting the wiring, the power supply board 14 and the control board 15 may be provided in one of the devices.

The vertical blind 1 is provided with a light receiving unit cord 17 extending to the outside in order to receive a signal from a remote control (external operation terminal) 16 for remotely controlling the operation of the slats 5a and 5b. A portable light receiving unit (receiving unit) 17a is connected to the light receiving unit cord 17. The portable light receiving unit 17a is attached at a position where it can receive a signal from the remote control 16 and is connected to the slats 5a and 5b.
The remote control 16 is not installed within the range of movement of the remote controllers 5a and 5b, or in a location exposed to strong infrared rays such as direct sunlight. The remote control 16 transmits and receives infrared signals, and the infrared transmission and reception range is, for example, about 7 m, and the transmission angle is within about 30 degrees.

Next, a structure for supporting the slats 5a, 5b in two parallel rows will be described with reference to Fig. 5. In the case shown in Fig. 5(a), a first runner holding housing (first rail-shaped housing) 3e is housed in the first hanger rail 3A, which serves as an outer frame, along the rail longitudinal direction.
A second runner holding housing (second rail-shaped housing) 3f is housed along the rail longitudinal direction within the second hanger rail 3B which serves as the outer frame. The first hanger rail 3A and the second hanger rail 3B are fixed to the top surface using brackets 2a and 2b, respectively.

On the other hand, in the case shown in FIG. 5(b), the first runner holding housing 3e and the second runner holding housing 3
The induction motors 11a, 11b are housed in the hanger rail 3G, which is the outer frame of the runner 4, so as to be arranged side by side at a predetermined interval along the rail longitudinal direction, and the induction motors 11a, 11b are integrated. As shown in Fig. 6(b), the runner holding housings 3e, 3f have a substantially U-shaped vertical cross section, and recesses for sliding the convex portions 44 formed on both the left and right ends of the runner 4 are formed on both ends. The shape of the runner holding housings 3e, 3f shown in this figure is one example, and any auxiliary member having a shape that allows the runner 4 to slide in the horizontal direction may be used.

Next, a method of attaching the hanger rails 3A and 3B constituting the vertical blind 1 according to the second embodiment to the top surface or the like will be described with reference to FIG.

The brackets 2a and 2b are generally plate-shaped members, and have claws 2e formed on both ends of the lower surface.
A pair of protrusions 3h formed on the top surface of the hanger rails 3A and 3B engage with the claws 2e. With this configuration, the hanger rails 3A and 3B are held horizontally while the brackets 2 are fastened to the hanger rails 3A and 3B.
The brackets 2a and 2b are fixed to the top surface or the like with a screw through a hole 2f formed in the center.

The bracket plate 2c is a plate-like member having two holes 2g at positions corresponding to the holes 2f of the brackets 2a and 2b, and is disposed between the brackets 2a and 2b and the top surface.
The hanger rails 3A, 3B arranged in two rows in front and behind are spaced apart at a predetermined interval.

Next, the operation buttons of the remote control 16 used in the vertical blind 1 according to the second embodiment will be described with reference to FIG.

FIG. 7A shows a remote control 16A having a mode change function, and a mode switching button 160
Each time the button is pressed, the open mode in which the slats 5a and 5b are pulled out and folded up and the tilt mode in which the rotation angle (tilt angle) of the slats 5a and 5b is adjusted is alternately selected. In the open mode, the LED 161a is lit, and in the tilt mode, the LED 161b is lit.
In the open mode, when the OPEN button 162 is pressed, the slats 5a and 5b are folded in and stopped when they are completely opened, when the CLOSE button 163 is pressed, the slats 5a and 5b are extended and stopped when they are completely closed, and when the STOP button 164 is pressed, the slats 5a and 5b are opened in that position.
On the other hand, in the tilt mode, when the slat rotation button 165 is pressed, the slats 5a and 5b rotate clockwise, and when the slat rotation button 166 is pressed, the slats 5a and 5b rotate counterclockwise.
The operation is performed with the slats 5a and 5b all pulled out.
Even if the slat rotation buttons 165, 166 are pressed at the intermediate guidance position b, the slats 5a, 5b will not be tilted.

7B shows a zone switch type remote controller 16B, which has 15 preset levels for the "guidance distance of the slats 5a and 5b,""angle of the first slat 5a," and "angle of the second slat 5b." By pressing an OPEN button 170, a CLOSE button 171, and slat rotation buttons 172 to 175, the guiding distance of the slats 5a and 5b and the angle of the slats 5a and 5b can be adjusted.
The tilt angle (rotation angle) of Ob can be adjusted in 15 steps.
The LED lamps on the display memories 176-178 move up and down and light up according to the number of times the PEN button 170, CLOSE button 171, and slat rotation buttons 172-175 are pressed after being pressed for a long time. The slats 5a and 5b move or rotate in proportion to the position of the LEDs and then automatically stop.
When the button 70 is pressed, the slats 5a and 5b move to a preset designated position.
When the slats 5a, 5b are extended, pressing the CLOSE button 171 moves the slats 5a, 5b to the preset designated positions. When the angle of the slats 5b is adjusted, pressing the slat rotation buttons 172, 173 rotates the slats 5b clockwise/counterclockwise to the preset designated angle. When the angle of the slats 5a is adjusted, pressing the slat rotation buttons 174, 175
Pressing this button rotates the slats 5a clockwise/counterclockwise to a preset specified angle.

The external operation terminal is not limited to the remote control 16 using infrared rays, but may be a wireless terminal using wireless communication at a specified frequency, a voice recognition terminal, or a switch-type external operation terminal using a wired connection as long as it has a communication function for transmitting command signals between the vertical blinds 1.

Next, a functional block diagram of the vertical blind 1 according to the second embodiment will be described with reference to FIG.
a, a second tilt motor 9b for controlling the rotation of the tilt shaft 6b, and a tilt encoder 12a
, 12b, a first induction motor 11a that controls the rotation of the drive shaft 10a, a second induction motor 11b that controls the rotation of the drive shaft 10b, induction encoders 13a, 13b, a power supply board 14, a control unit 15, and a receiving unit 18.

The first tilt encoder 12a and the second tilt encoder 12b detect the rotation of the first tilt shaft 6a and the second tilt shaft 6b as a physical change amount using a sensor element by a detection method such as a mechanical, magnetic, or optical detection method, and transmit the detected rotation amount as an electrical signal to the first tilt angle detection unit 15d and the second tilt angle detection unit 15e. The tilt angle detection units 15d and 15e detect the rotation amount of the first slat 5a and
And the tilt angle of the second slat 5b is calculated.

The first induction encoder 13a and the second induction encoder 13b are tilt encoder 12a
The rotation of the drive shafts 10a, 10b is detected as a physical change amount by the sensor elements in a similar manner to that of the induction encoders 13a, 13b. The calculation unit 15a calculates the induction position of the runner 4 from the rotation amount of the drive shafts 10a, 10b detected by the induction encoders 13a, 13b.

The control unit 15 has a calculation unit 15a such as a microcomputer, a memory unit 15b such as an EEPROM that stores table information describing the interference areas according to the tilt angles of the slats 5a and 5b, control programs for the slats 5a and 5b, and a motor drive unit 15c.

The calculation unit 15a calculates and controls the tilt angle of the slats 5a and 5b and the rotation amount of the drive shaft 8 and the tilt shaft 5 based on the table information and the control program stored in the memory unit 15b. The calculation unit 15a also determines whether the receiving unit 18 has received an angle adjustment signal from the remote control 16. The first tilt angle detection unit 15d detects the angle of the first tilt encoder 1
The second tilt angle detector 15e detects the tilt angle of the second slat 5b based on a rotation amount detection signal from the second tilt encoder 12b.

The determination unit 15f receives an angle adjustment signal from the remote control 16, and when it is assumed that the first slat 5a or the second slat 5b is rotated based on the angle adjustment signal, the determination unit 15f determines the angle of the first slat 5a acquired from the first tilt angle detection unit 15d and the second tilt angle detection unit 15e.
and the tilt angle of the second slat 5b. Specifically, the determination unit 15f can make this determination by referring to table information stored in the memory unit 15b and prepared in advance, or by using an arithmetic expression using numerical values such as the tilt angles and pitch intervals of the predefined slats 5a and 5b. When it is determined that the first slat 5a or the second slat 5b will pass through the interference area, the determination unit 15f controls the rotation of the first slat 5a or the second slat 5b first so as to move out of the interference area. The tilt angle control unit 15g controls the rotation of the first slat 5a and the second slat 5b based on the instruction from the determination unit 15f.

Based on a control signal from tilt angle control unit 15g, motor drive unit 15c controls the rotation of a first induction motor 11a that rotates first drive shaft 10a, a second induction motor 11b that rotates second drive shaft 10b, a first tilt motor 9a that rotates first tilt shaft 6a, and a second tilt motor 9b that rotates second tilt shaft 6b.

The receiving unit 18 includes an RF module 18a, which is an electronic part having a wireless communication function with a mobile terminal or the like, and an infrared receiving unit 17b that performs infrared communication with the remote control 16.
receives an angle adjustment signal for adjusting the tilt angles of at least the first slat 5a and the second slat 5b from an external operation terminal such as a remote control 16.

Next, the control operation of the slats 5a, 5b provided in the vertical blind 1 according to the second embodiment will be described with reference to Fig. 9. Here, the description will be made assuming that the width of the slats 5a, 5b is 100 mm, and the pitch interval between the first slat 5a and the second slat 5b is 40 mm.
This control assumes a pattern in which the tilt angle of the angle adjustment signal for the slat 5a or slat 5b is determined and input at the start of operation using the remote control 16A shown in FIG.

First, to adjust the tilt angle of the slats 5a and 5b, the remote control 16A is operated to select mode 1 (open mode), and the runners 4 are pulled out along the hanger rails 3A and 3B, and the succeeding runners 4 are pulled out successively at a predetermined interval. Then, as shown in Fig. 9(a), the runners 4 are pulled out to one end side of the hanger rails 3A and 3B, and the tilt operation is started in the fully open state shown in step 1.

When the mode is changed to the tilt mode, the information that the desired tilt angle of the slats 5a is 0 degrees and in the fully closed state is input to the control unit 15 via the receiving unit 18. At this time, the determining unit 15f determines whether the current tilt angle of the slats 5a (90 degrees) and the tilt angle of the slats 5b (
Based on the determined tilt angle (angle of 90 degrees) of slat 5a, it is determined that if slat 5a is fully closed as it is, an interference area with the possibility of interference with slat 5b will be generated, as shown in the shaded area in step 2 of Figure 9(b). Therefore, before fully closing slat 5a, as shown in step 3, the determination unit 15f rotates slat 5b clockwise by 20 degrees to remove slat 5b from the interference area shown in the shaded area, thereby controlling the rotation of the tilt angle of slat 5b from 90 degrees to 110 degrees, thereby excluding slat 5b from the interference area. Next, as shown in step 4, slat 5a is rotated counterclockwise to control the rotation of the tilt angle from 90 degrees to 0 degrees. Then,
Step 5f judges whether there is an interference area in the area (shaded area) when slat 5b is returned to the original tilt angle of 90 degrees in this state, and judges that no interference area will occur. Therefore, as shown in step 5, slat 5b is tilted counterclockwise by 20 degrees to return it to the original fully open state with a tilt angle of 90 degrees.

Next, when the mode is changed to the open mode, the desired tilt angle of the slat 5a becomes 90
The controller 15 receives input indicating that the slat 5a is in a fully open state at 0 degrees. At this time, the determination unit 15f determines, based on the current tilt angle of the slat 5a (0 degrees) and the tilt angle of the slat 5b (90 degrees), that if the slat 5a is fully closed, an interference area with the slat 5b, as shown in the shaded area in step 6 of FIG. 9, will be generated. Therefore, before the slat 5a is fully opened, the determination unit 15f rotates the slat 5b clockwise by 20 degrees as shown in step 7 so as to remove the slat 5b from the interference area (shaded area) first, thereby controlling the rotation of the tilt angle of the slat 5b from 90 degrees to 110 degrees, thereby excluding the slat 5b from the interference area. Then, as shown in step 8, the slat 5a is rotated clockwise to control the rotation of the tilt angle from 0 degrees to 90 degrees. Next, the determination unit 15f determines whether the slat 5b is in this state, as shown in step 9.
It is determined that no interference area will occur in the shaded area when slat 5b is returned to its original tilt angle of 90 degrees. Therefore, as shown in step 9, slat 5b is tilted counterclockwise by 20 degrees to return it to its original fully open state with a tilt angle of 90 degrees.

Next, an example of operation when using the switching remote control 16A of the vertical blind 1 according to the second embodiment and the tilt operation of the slats 5a and 5b will be described with reference to Figs. 10 and 11. First, as shown in step 10 of Fig. 10(a), the open mode is selected by the switching button 160 of the remote control 16A, and the CLOSE button 163 is pressed to close the slats 5a and 5b.
, 5b are unwound and the process ends.

Next, as shown in Fig. 10(b), the switch button 160 on the remote control 16A is pressed to select the tilt mode from the open mode. At this time, as shown in steps 11 to 13, the slats 5a are automatically controlled to be in the fully closed state and the slats 5b are automatically controlled to be in the fully open state. Note that this control is the same as that shown in Fig. 9(b), so a description thereof will be omitted.

Then, from the state of step 14 shown in FIG. 10(b), the slat rotation button 165 or
In this case, the determination unit 15f determines that there is no interference area, and the tilt angle of the slat 5b is changed from 90 degrees to 0 degrees by rotating the slat 5b counterclockwise as shown in step 15, or the tilt angle of the slat 5b is changed from 90 degrees to 0 degrees as shown in step 16.
Rotate slat 5a, which is the lace fabric, clockwise to change the tilt angle from 90 degrees to 180 degrees. At this time, the amount of light can be appropriately adjusted by fully closing slat 5a, which is the lace fabric, and adjusting the tilt angle of slat 5b, which is the drape fabric. Finally, as shown in FIG. 11, when the switch button 160 on the remote control 16A is pressed to select the open mode from the tilt mode, the slats 5a and 5b are closed.
The tilt angle of the slat 5b is automatically controlled from the fully closed state to the fully open state.
The tilt angle of slat 5a is then returned to 90 degrees (step 18), and finally the tilt angle of slat 5b is returned to 90 degrees (steps 19-20).

Next, the operation procedure of the vertical blind 1 according to the second embodiment will be described with reference to the flow chart shown in FIG.
Then, it is detected whether or not an angle adjustment signal is received from the remote control 16 (S121).
When an angle adjustment signal is received from the tilt angle detection units 15d, 15e (Yes in S121), the judgment unit 15f obtains the current tilt angles of the slats 5a, 5b from the tilt angle detection units 15d, 15e, and judges whether or not one of the slats 5a or 5b will pass through the interference area when it controls the other slat 5a or 5b based on the angle adjustment signal (S122).

Next, when the determination unit 15f determines that the interference area is to be passed (Y in S122),
es), the tilt angle control unit 15g controls the other slat 5a or 5b, which is not the adjustment side of the angle adjustment signal, to rotate out of the interference possible area first based on the command from the determination unit 15f (S12
3). Then, the tilt angle control unit 15g controls the rotation of the tilt angle of the slat 5a or 5b on the adjustment side of the angle adjustment signal based on a command from the determination unit 15f (S124). Next, the determination unit 15f determines whether or not the other slat 5a or 5b that is not the adjustment target passes through the interference possible area when the other slat 5a or 5b is rotated and controlled to its original position before rotation (S125).
When it is determined that the slat 5a or 5b does not pass through the interference area in the judgment unit 15f (No in S125), the tilt angle control unit 15g controls the other slat 5a or 5b that is not on the adjustment side of the angle adjustment signal to rotate to the original position based on the command from the judgment unit 15f (S126). When it is determined that the slat 5a or 5b passes through the interference area in the judgment unit 15f (Yes in S125), the tilt angle control unit 15g does not control the other slat 5a or 5b that is not on the adjustment side of the angle adjustment signal to rotate to the original position.

On the other hand, if the judgment unit 15f determines that the slat 5a or 5b that is the target of adjustment of the angle adjustment signal will not pass through the interference area (No in S122), the tilt angle control unit 15g controls the rotation of the slat 5a or 5b based on the angle adjustment signal based on an instruction from the judgment unit 15f (S127).

As described above, the vertical blind 1 according to the second embodiment includes a receiver 18 that receives an angle adjustment signal for adjusting the tilt angles of the first slat 5a and the second slat 5b from the remote control 16, a first tilt angle detector 12a that detects the tilt angle of the first slat 5a,
a second tilt angle detection unit 12b that detects the tilt angle of the second slat 5b; a determination unit 15f that, when receiving an angle adjustment signal, determines whether or not the first slat 5a and the second slat 5b will pass through the interference possible area based on the tilt angles of the first slat 5a and the second slat 5b acquired from the first tilt angle detection unit 12a and the second tilt angle detection unit 12b, and when it is determined that the first slat 5a or the second slat 5b will pass through the interference possible area, controls the first slat 5a or the second slat 5b to rotate first so as to get out of the interference possible area; and a determination unit 15f that performs control to rotate the first slat 5a or the second slat 5b first based on an instruction from the determination unit 15f.
and a motor drive unit 15c that rotates the first slat 5a and the second slat 5b based on a control signal from the tilt angle control unit 15g.

With this configuration, in the vertical blind 1 according to the second embodiment, the size and design of the device can be reduced, and at the same time, the slats 5a, 5b can be appropriately prevented from contacting each other.
You can also enjoy new light blocking and dimming settings that are different from conventional vertical blinds.

(Modification)
A vertical blind 1 according to a modification of the second embodiment will be described with reference to Figs. 13 and 14. In this modification, a remote control 16C shown in Fig. 13 is used. When an OPEN button 181 is pressed on this remote control 16C, the slats 5a, 5b are folded in and stop when they finish opening, when a CLOSE button 182 is pressed, the slats 5a, 5b are extended and stop when they finish closing, and when a STOP button 183 is pressed, the slats 5a, 5b stop at that position. Also, a slat rotation button 182 is pressed to control the rotation of the indoor slats 5b.
84, 185, a slat rotation button 1 for controlling the rotation of the outdoor slat 5a
When the slat rotation buttons 184, 186 are pressed, the slats 5a, 5b rotate clockwise only while the buttons are pressed.
When button 7 is pressed, the slats 5a and 5b rotate counterclockwise only while the button is pressed, thereby adjusting the tilt angle.

Next, the slat control of the vertical blind 1 according to the present modified example 1 will be described. When an angle adjustment signal for the first slat 5a is received from the remote control 16C via the receiving unit 18 of the vertical blind 1 and the determining unit 15f determines that there is an interference possible area, the tilt angle control unit 15g controls the rotation of the second slat 5b so as to remove it from the interference possible area. The difference from the above-mentioned embodiment 1 is that in the present modified example 1, since the remote control 16C is used, whether or not there is an interference possible area cannot be determined until immediately before the slats 5a and 5b come into contact with each other. This will be described with reference to FIG. 14.

First, the tilt operation is started with the fully open state in step 21 of Figure 14 (a), and in the shaded area where the judgment unit 15f judges that there is no area where interference is possible, the slats 5a and 5b rotate in response to pressing of the slat rotation buttons 184 to 188 on the remote control 16C.

14B, in step 22 and further in step 23, the slat rotation button 187 of the remote control 16C is pressed to instruct the slat 5a to rotate further counterclockwise. In this case, as shown in steps 24 and 25, the slat 5b
In other words, the determination unit 15f of the vertical blind 1 of the present modified example 1 determines whether the slats 5a and 5b come into contact with each other by controlling the remote control 1.
Since the determination can only be made immediately after a command is issued by pressing any of the slat rotation buttons 184 to 188 of 6C, the slats 5a, 5b are gradually controlled to avoid interference just before they interfere with each other. With this configuration, as with the vertical blind 1 according to the second embodiment, the slats 5a, 5b can be appropriately prevented from contacting each other.

(Embodiment 3)
Hereinafter, a vertical blind 1 according to a third embodiment of the present invention will be described with reference to Figs. 15 to 19. Note that the same names and symbols are used for the same functional configurations as those of the vertical blind 1 according to the above-mentioned embodiment, and detailed descriptions thereof will be omitted.

The vertical blind 1 according to the third embodiment is mainly used near a window in a corner of a room, and the first slat 5i and the second slat 5j are suspended and supported so as to form a right angle. As shown in Fig. 15, the vertical blind 1 includes a first hanger rail (first rail-shaped housing) 3I for supporting a plurality of runners that rotatably suspend and support the first slat 5i so as to be horizontally movable, and a second hanger rail (second rail-shaped housing) 3J for supporting a plurality of runners that rotatably suspend and support the second slat 5j so as to be horizontally movable. The end side of the first hanger rail 3I and the end side of the second hanger rail 3J are arranged close to each other so as to form a right angle (so as to be perpendicular to each other).

When the first slat 5i and the second slat 5j rotate, the first slat 5i arranged on the end side of the first hanger rail 3I and the second slat 5j arranged on the end side of the second hanger rail 3J have an interference area where they may interfere with each other.
As shown in FIG. 16, when the first slat 5i and the second slat 5j are in a fully closed state, the first slat 5i and the second slat 5j are spaced apart from each other so as not to come into contact with each other (a space just before they come into contact with each other).
FIG. 17 shows the functional configuration of the vertical blind 1 according to the third embodiment. Two vertical blinds having the same functions as the vertical blind 1 according to the second embodiment are connected at a corner.

Next, the operation buttons of the remote control 16 for remotely controlling the vertical blind 1 according to the third embodiment will be described with reference to FIG. 18. FIG. 18(a) shows an address type remote control 16D.
The buttons 190a and 190b are preset to be assigned to the operation of the first slat 5i and the operation of the second slat 5j, respectively. When the ALL button 191 is selected, the operation of all addresses is selected. When the OPEN button 192 is pressed, the slat 5i or 5j of the selected address is folded and stopped when it is finished opening, and when the CLOSE button 193 is pressed, the slat 5i or 5j of the selected address is closed.
When the STOP button 194 is pressed, the slat 5i or 5j of the selected address stops at that position. When the slat rotation button 195 is pressed, the slat 5i or 5j of the selected address rotates clockwise while the button is pressed.
When the slat rotation button 196 is pressed, the slats 5i of the selected address are rotated while the button is pressed.
Alternatively, the tilt angle is adjusted by rotating 5j counterclockwise.

The remote controller 16E shown in Fig. 18(b) is operated in the same manner as the remote controller 16B shown in Fig. 7(b). When folding the slats 5i and 5j, pressing the OPEN button 200 moves the slats 5i and 5j to a preset designated position. When extending the slats 5i and 5j, pressing the CLOSE button 201 moves the slats 5i and 5j to a preset designated position.
When adjusting the angle of the slat 5i or 5j, the slat rotation button 202
When 205 is pressed, the slat 5a or 5b rotates clockwise/counterclockwise to a preset designated angle. As in the second embodiment, the remote controllers 16D and 16E are not limited to wireless communication, but may be external operation terminals of a switch type using wires as long as they have a function of communicating command signals with the vertical blind 1.

Next, the slat control of the vertical blind 1 using the remote control 16E will be described with reference to Fig. 19. Fig. 19(a) and Fig. 19(b) show the case where the first slat 5i can rotate counterclockwise. In the case of step 30 in Fig. 19(a), since the first slat 5i is not within the tilt range (within the diagonal line) of the second slat 5j, the determining unit 15f determines that there is no interference area, and rotates the second slat 5j to a predetermined angle. In step 3 in Fig. 19(b),
In the case of 1, the first slat 5i is within the tilt range (within the diagonal line) of the second slat 5j,
The determination unit 15f determines that there is an interference possible area. Therefore, as shown in step 32, the second slat 5j is first tilted counterclockwise out of the tilt range (hatched range) of the first slat 5i, and then as shown in step 33, the second slat 5j is tilted counterclockwise to the desired angle. Then, since the second slat 5j is not within the tilt range (hatched range) of the first slat 5i, the first slat 5i is finally returned to its original position in the counterclockwise direction as shown in step 34.

On the other hand, Fig. 19(c) and Fig. 19(d) show a case where the first slat 5i can rotate clockwise. In the case of step 35 of Fig. 19(c), within the tilt range of the second slat 5j (
In the case of step 36 in FIG. 19(d), the first slat 5i is within the tilt range (hatched area) of the second slat 5j, so the determination unit 15f determines that there is no interference area, and rotates the second slat 5j to a predetermined angle.
Then, as shown in step 38, the second slat 5j is tilted counterclockwise to a desired angle. If the second slat 5j is not within the tilt range (shaded range) of the first slat 5i, finally, as shown in step 39, the first slat 5i is returned to its original position in the clockwise direction.

With this configuration, even in the vertical blind 1 of this embodiment 3 in which the first and second slats are suspended so as to form a right angle, it is possible to improve the size and design of the device while also appropriately preventing the slats 5i, 5j from coming into contact with each other.

The present invention is not limited to the configuration of the above embodiment, and various modifications are possible without departing from the spirit of the invention. For example, the predetermined intervals and tilt angles in the above embodiment are merely examples, and can be appropriately changed according to the width of the slats, the pitch width of adjacent slats, etc.

The present invention can also be realized as a method for controlling the slats of a vertical blind, which includes steps corresponding to the characteristic constituent means of the vertical blind, or as a program including all of these steps. Such a program can be distributed via a recording medium such as a USB or a transmission medium such as the Internet.

1 Vertical blind 2a, 2b Bracket 2c Bracket plate 3A, 3I First hanger rail (first rail-shaped housing)
3B, 3J Second hanger rail (second rail-shaped housing)
3e, 3f Runner holding housing (rail-shaped housing)
4 Runner 5a, 5i First slat 5b, 5j Second slat 6, 6a, 6b Tilt shaft 9a First tilt motor 9b Second tilt motor 10a, 10b Drive shaft
REFERENCE SIGNS LIST 11a First induction motor 11b Second induction motor 12a First tilt encoder 12b Second tilt encoder 13a First induction encoder 13b Second induction encoder 15 Control unit 15a Calculation unit 15b Memory unit 15c Motor drive unit 15d First tilt angle detection unit 15e Second tilt angle detection unit 15f Determination unit 15g Tilt angle control unit 16 Remote control (external operation terminal)
18 Receiving section

Claims (8)

A vertical blind in which the first slats and the second slats are suspended and supported in parallel in two rows, front and back,
a first rail-shaped housing for supporting a plurality of runners that rotatably suspend and support the first slat so as to be horizontally movable;
a second rail-shaped housing arranged in parallel with the first rail-shaped housing at a predetermined interval and configured to horizontally movably support a plurality of runners that rotatably suspend and support the second slats;
The first slat and the second slat have an interference area in which they may interfere with each other when rotating,
A vertical blind characterized in that the specified interval is a interval at which the first slat and the second slat do not abut when one of the first slat or the second slat is in a fully closed state and the other slat is in a fully open state. The first rail-shaped housing is accommodated in a first hanger rail that serves as an outer frame body along the rail longitudinal direction,
The vertical blind according to claim 1, wherein the second rail-shaped housing is accommodated in a second hanger rail that serves as an outer frame body along a rail longitudinal direction. 2. The vertical blind according to claim 1, wherein the first rail-shaped housing and the second rail-shaped housing are housed along a rail longitudinal direction within a hanger rail that constitutes one outer frame body. a first rail-shaped housing for supporting a plurality of runners, the runners supporting the first slats in a rotatable manner, in a horizontally movable manner;
A vertical blind comprising: a second rail-shaped housing for supporting a plurality of runners that rotatably suspend and support the second slats, the second rail-shaped housing supporting the runners in a horizontally movable manner;
The first rail-shaped housing and the second rail-shaped housing are disposed close to each other so as to form a right angle,
A vertical blind characterized in that when the first slat and the second slat rotate, the first slat arranged on the end side of the first rail-shaped housing and the second slat arranged on the end side of the second rail-shaped housing have an interference area in which they may interfere with each other, and when the first slat and the second slat are in a fully closed state, the first slat and the second slat do not abut each other. The vertical blind further comprises:
A receiving unit that receives an angle adjustment signal for adjusting the tilt angles of the first slat and the second slat from an external operation terminal;
A first tilt angle detection unit that detects the tilt angle of the first slat;
A second tilt angle detection unit that detects the tilt angle of the second slat;
When the angle adjustment signal is received, it is determined whether or not the first slat and the second slat will pass through the interference possible area based on the tilt angles of the first slat and the second slat acquired from the first tilt angle detection unit and the second tilt angle detection unit. If it is determined that the first slat and the second slat will pass through the interference possible area,
A determination unit that controls the rotation of the first slat or the second slat so as to be out of the interference area;
a tilt angle control unit that controls the rotation of the first slat and the second slat based on an instruction from the determination unit;
The vertical blind according to any one of claims 1 to 4, further comprising a motor drive unit that rotates the first slat and the second slat based on a control signal from the tilt angle control unit. The vertical blind according to claim 5, characterized in that the determination unit makes the determination by referring to table information stored in a memory unit and prepared in advance, or by using an arithmetic formula including predefined tilt angles of the first slat and the second slat. A slat control method for a vertical blind in which first slats and second slats are suspended and supported in parallel in two rows, front and rear, comprising:
When the first slat and the second slat have an interference area where they may interfere with each other when rotating, and when one of the first slat and the second slat is in a fully closed state and the other slat is in a fully open state, the distance between the first slat and the second slat is such that they do not come into contact with each other,
A receiving step of receiving an angle adjustment signal for adjusting the tilt angles of the first slat and the second slat from an external operation terminal;
a first tilt angle detection step of detecting a tilt angle of the first slat;
a second tilt angle detection step of detecting a tilt angle of the second slat;
a determination step of determining whether or not the first slat or the second slat will pass through the interference possible area based on the tilt angles of the first slat and the second slat acquired in the first tilt angle detection step and the second tilt angle detection step when the angle adjustment signal is received, and controlling the first slat or the second slat to rotate first so as to move out of the interference possible area if it is determined that the first slat or the second slat will pass through the interference possible area;
a tilt angle control step of rotating and controlling the first slat and the second slat based on the instruction in the determination step;
A slat control method comprising: a motor driving step of rotating the first slat and the second slat based on a control signal in the tilt angle control step. A program for controlling a vertical blind in which first slats and second slats are suspended and supported in parallel in two rows, front and rear,
When the first slat and the second slat have an interference area where they may interfere with each other when rotating, and when one of the first slat and the second slat is in a fully closed state and the other slat is in a fully open state, the distance between the first slat and the second slat is such that they do not come into contact with each other,
A receiving step of receiving an angle adjustment signal for adjusting the tilt angles of the first slat and the second slat from an external operation terminal;
a first tilt angle detection step of detecting a tilt angle of the first slat;
a second tilt angle detection step of detecting a tilt angle of the second slat;
a determination step of determining whether or not the first slat or the second slat will pass through the interference possible area based on the tilt angles of the first slat and the second slat acquired in the first tilt angle detection step and the second tilt angle detection step when the angle adjustment signal is received, and controlling the first slat or the second slat to rotate first so as to move out of the interference possible area if it is determined that the first slat or the second slat will pass through the interference possible area;
a tilt angle control step of rotating and controlling the first slat and the second slat based on the instruction in the determination step;
and a motor driving step of rotating the first slat and the second slat based on the control signal in the tilt angle control step.