JPH09112160A - Electric blinds - Google Patents

Abstract

(57) [Abstract] (Corrected) [PROBLEMS] To provide an electric blind provided with an actuator used for a skylight or a tilted window. SOLUTION: A first winding drum 28 has an opening cord 26.
In the winding direction, the second winding drum 38 causes the closing cord 36 to
When rotating in the unwinding direction, the first and second motors 30 and 40 are stopped by the open detection of the open detection device 31, and the second motor is stopped by the detection of the slack of the cord of the second slack detection means 44. When the first winding drum rotates in the cord unwinding direction and the second winding drum rotates in the cord winding direction, both motors are stopped by the detection of the closing of the closing detection device 33, and the cord of the first slack detecting means 42 is detected. The slackness detection or the slackness detection of the cord of the second slackness detection means stops the first motor. When the tooth 56 screwed to the screw shaft 48 that rotates integrally with the first motor moves in the axial direction by the rotation of the screw shaft and comes into contact with either of the detection devices, both motors stop.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blind used for a skylight or a tilted window.

[0002]

2. Description of the Related Art Conventional electric blinds for skylights or tilted windows include those disclosed in Japanese Patent Laid-Open No. 4-247187 and Japanese Utility Model Laid-Open No. 4-98996. That is, the one disclosed in Japanese Patent Laid-Open No. 4-247187 is
First and second provided on a pair of opposing window frames, respectively
First and second rotary drums driven by a motor are axially supported in the head box, a bottom rail is arranged between both head boxes, and a plurality of bottom rails are provided between the first head box and the bottom rail. The slat is provided in an aligned state, one end is connected to the bottom rail, the other end is inserted through the slat row and is introduced into the first head box, and the other end of the blind opening / closing cord is wound and wound around the first rotating drum. The tension cord is connected to the bottom rail at one end, and the other end of the tensioning cord is connected to the second rotary drum so as to be able to be wound and unwound, to the first headbox and the second headbox. Is provided with a limit switch for detecting the loosening of the blind opening / closing cord or the tension cord and stopping the rotation of the rotary drum.

In Japanese Utility Model Laid-Open No. 4-98996, the first and second motors are respectively driven in first and second headboxes provided in a pair of opposing window frames. The first and second rotating drums are axially supported, a bottom rail is arranged between both head boxes, and a plurality of slats are provided in an aligned state between the first head box and the bottom rail, and one end is The other end of the opening cord, which is connected to the bottom rail and the other end of which is inserted into the slat row and is introduced into the first head box, is connected to the first rotating drum so that it can be wound and unwound, and one end of which is the bottom. The other end of the closing cord connected to the rail is connected to the second rotating drum so as to be able to be wound and unwound, and the first headbox detects the opening of the slat and detects the first mode. The have up limit switch to stop is provided on the second headbox, in which the down limit switch to stop the second motor by detecting the closure of the slats is provided.

[0004]

However, the above-mentioned conventional electric blinds have the following problems. That is, in the one disclosed in Japanese Patent Application Laid-Open No. 4-247187, there is no problem when it is attached to the horizontal window, but when it is attached to the inclined window, the first rotating drum is used when the blind is closed. When the unwinding speed is faster than the winding speed of the second rotary drum, the unwinding amount of the opening / closing cord becomes larger than the winding amount of the tension cord. At this time,
Since the cord for opening and closing maintains the tension state due to the weight of the bottom rail, the cord for tensioning becomes loose, the limit switch operates, and the rotation of the second motor stops.
Since the first motor continues to rotate, there is a problem that the blind is closed while the tension cord is loose.

Further, in the one disclosed in Japanese Utility Model Laid-Open No. 4-98996, when this is attached to a horizontal window, the second rotating drum is driven by a second motor when the opened blind is to be closed. The closing cord is wound up, and the bottom rail, the slat closest to the bottom rail, and the slat adjacent to this slat are pulled toward the second headbox side in this order, so the slat closest to the first headbox is closed. In this case, the first motor cannot operate because it may remain in contact with the limit switch until approaching. Therefore, the first
Since the rotating drum cannot wind the cord for opening, the blind cannot be opened even if it is switched to open in the middle of closing, and once the blind is fully closed, the slat closest to the first headbox is placed. There is a problem that the blind must be opened again after the limit switch is released by separating from the first head box. An object of the present invention is to solve such a problem.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention comprises a pair of window frames (10a, 10b) facing each other of a skylight or a tilted window,
A first head box (12) and a second head box (14) are provided respectively, and a bottom rail (20) is arranged between the first head box (12) and the second head box (14). In addition, a large number of slats (22) are aligned between the first head box (12) and the bottom rail (20), and one end of the first head box (12) has a bottom rail. (20)
And the other end of the opening cord (26) that is inserted into the first head box (12) through the slat (22) row and is connected to the other end so as to be wound and unwound. A first winding drum (28) and a first motor (30) capable of rotationally driving the first winding drum (28) are built in, and one end of the second head box (14) is a bottom. A second winding drum connected to the rail (20) and having the other end of the closing cord (36) introduced into the second headbox (14) connected to the other end so as to be able to be wound and unwound. (38) and the second winding drum (38)
In an electric blind having a second motor (40) capable of rotationally driving the slat, an opening detection means (31) for detecting the release of the slat (22) and a slat (2).
Closure detection means (33) for detecting closure of (2) and first slack detection means (4) for detecting slack of the opening cord (26).
2) and second slack detecting means (44) for detecting slack of the closing cord (36), and the first winding drum (2)
When 8) rotates in the winding direction of the opening cord (26) and the second winding drum (38) rotates in the unwinding direction of the closing cord (36), the first motor (30) operates. When the opening detecting means (31) detects the opening of the slat (22), the second motor (40) stops, and when the opening detecting means (31) detects the opening of the slat (22), Alternatively, when the slack of the closing cord (36) is detected by the second slack detecting means (44), the second slack detecting means (44) stops, and the first winding drum (28) rotates in the unwinding direction of the opening cord (26), When the second winding drum (38) rotates in the direction of winding the closing cord (36), the first motor (30) causes the closing detection means (33) to detect the slat (2).
When the closure of 2) is detected, or when the slack of the opening cord (26) is detected by the first slack detecting means (42), or the closing cord (36) is detected by the second slack detecting means (44). Stop when slack is detected,
The second motor (40) is characterized in that it is configured to stop when the closure detection means (33) detects closure of the slat (22).

When the blind is opened, the first winding drum rotates in the direction for winding the opening cord and the second winding drum rotates in the direction for unwinding the closing cord, but the rotation of the second motor. When the speed becomes faster than the rotation speed of the first motor and the unwinding amount of the closing cord becomes larger than the winding amount of the opening cord, the closing cord is attached regardless of whether it is attached to the inclined window or the horizontal window. However, since the second motor stops when the slack of the closing cord is detected, only the first motor drives and the first winding drum winds only the opening cord. As a result, the slack of the closing cord is eliminated, the second motor is driven again, and the opening of the slats is restarted. Therefore, the slats are opened while the closing cord is in a loose state. Will disappear.

When closing the blind, the first
The take-up drum rotates in the direction to unwind the releasing cord,
The winding drum rotates in the direction of winding the closing cord,
When the rotation speed of the first motor becomes faster than the rotation speed of the second motor and the unwinding amount of the opening cord becomes larger than the winding amount of the closing cord, the closing cord is attached to the inclined window. However, when it is attached to the horizontal window, the opening cord is loosened, but the first motor is stopped regardless of whether the looseness of the opening cord or the closing cord is detected. Therefore, only the second motor is stopped. When driven, only the second winding drum will wind the closing cord. As a result, the looseness of the opening cord and the closing cord is eliminated, so that the first motor is driven again and the closing of the slat is restarted, so that the opening cord or the closing cord is loosened. The slats are no longer closed.

The invention according to claim 2 of the present invention is the same as the invention according to claim 1, in which the opening detecting means (3
1) and the closing detection means (33) are the first motor (30)
Alternatively, the screw shaft (4 that rotates integrally with the second motor (40)
When the top (56) screwed to 8) moves in the axial direction by the rotation of the screw shaft (48) and comes into contact with either the open detection means (31) or the close detection means (33). , The first motor (30) and the second motor (40) are stopped from rotating.

When the first motor and the second motor rotate in the slat opening direction, the top moves to one side of the screw shaft due to the rotation of the screw shaft that rotates integrally with the slat and contacts the opening detecting means. The rotations of the first motor and the second motor stop. Further, when the first motor and the second motor rotate in the slat closing direction, the rotation direction of the screw shaft is opposite to that described above, so that the top moves to the other side of the screw shaft and comes into contact with the closure detecting means. The rotations of the first motor and the second motor stop. Thus, the top only comes into contact with the opening detecting means and the closing detecting means when the slat is opened and closed, and the first motor and the second motor rotate in both directions during opening and closing. It is possible. Therefore, if the opening and closing of the slat are switched during opening and closing of the slat, the first motor and the second motor rotate in reverse. As a result, even when the blind is attached to the horizontal window, the first motor and the second motor can rotate when the blind is closed from the open state and then opened again during the closing process. It can be opened normally even on the way.

[0011]

FIG. 1 shows an electric blind 11 embodying the present invention. The first head box 1 is attached to the pair of window frames 10a and 10b facing each other of the skylight or the inclined window.
2 and the second head box 14 are brackets 16 and 1
8 is attached by the first head box 12
Between the second headbox 14 and the bottom rail 20
Is arranged. Between the first head box 12 and the bottom rail 20, a large number of slats 22 are supported in an aligned state by a ladder cord 21 shown in FIG. 4, and the first head box 12 and the second head box 14 are supported.
The two guide wires 24 that support the bottom rails 20 and the slats 22 are inserted at predetermined intervals in the longitudinal direction of the first head box 12 and the second head box 14 between them. It is erected with each open. In the first head box 12,
One end is connected to the bottom rail 20 and the other end is inserted through the row of slats 22 and is introduced into the first head box 12 and the other end is connected so that it can be wound and unwound, and Two first winding drums 28 connected to each other so that the upper end of the ladder cord 21 integrally rotates by a predetermined range angle, and the respective first winding drums 2
A first motor 30 capable of rotating 8 via a rotary shaft 27, and an opening detection device (opening detection means) 31 described later.
And a limit unit 32 having a closing detection device (closing detection means) 33, and a signal line 34 is derived from the first head box 12, and the first motor 30
Is connected to the controller 35 shown in FIG. In the second head box 14,
A closing cord 36 having one end connected to the bottom rail 20 and the other end introduced into the second head box 14.
A second winding drum 38, the other end of which is connected for winding and unwinding, and a second motor 40 capable of rotationally driving the second winding drum 38 via a rotation shaft 39. The signal line 37 is derived from the second head box 14 and is connected to the controller 35 that controls the operation of the second motor 40. At the position where the opening cord 26 of the first head box 12 is led out, the first slack detecting device 42 that detects the slack of the opening cord 26.
And a second slack detecting device 44 for detecting slack of the closing cord 36 is provided at a position where the closing cord 36 of the second head box 14 is led out.

Controller 35, first motor 30, second
The motor 40, the opening detection device 31, the closing detection device 33, the first slackness detection device 42, and the second slackness detection device 44 are shown in FIG.
The slats 22 are connected as shown in the circuit of
In order to release the second winding drum 3, the current IU flows from the controller 35 as shown in FIG. 3, the first winding drum 28 rotates in the direction of winding the opening cord 26, and the second winding drum 3
8 rotates in the direction in which the closing cord 36 is unwound. When the opening detection device 31 detects the opening of the slat 22 and opens the slat 22, the current IU1 and the current IU2 stop flowing through the first motor 30 and the second motor 40, respectively, so that they both stop rotating. When the second slack detecting device 44 detects the slack of the closing cord 36 and closes it, the relay 60 operates to open the first contact 62 and the second contact 64, and the current IU1 flows through the first motor 30. The current I is applied to the second motor 40.
Since U2 stops flowing, the first motor 30 continues to rotate and the second motor 40 stops rotating. Further, when closing the slat 22, as shown in FIG. 3, a current ID flows from the controller 35, the first winding drum 28 rotates in the direction to unwind the opening cord 26, and the second winding drum 38. Rotates in the winding direction of the closing cord 36. When the closure detection device 33 detects the closure of the slat 22 and opens it, the currents ID1 and ID2 cease to flow through the first motor 30 and the second motor 40, respectively, so that they both stop rotating. When the first slack detecting device 42 detects the slack of the opening cord 26 and opens it, the first motor 30
The current ID1 stops flowing and stops. When the second slack detecting device 44 detects the slack of the closing cord 36 and closes it, the relay 60 operates and the first contact 62 and the second contact 6
4 opens, the current ID1 does not flow through the first motor 30, and the current ID2 flows through the second motor 40.
The motor 30 stops rotating, and the second motor 40 continues rotating.

FIG. 2 shows a perspective view of the limit unit 32. Case 4 fixed to the first head box 12
A screw shaft 48, a first adjusting shaft 50, and a second adjusting shaft 52, which are arranged in parallel with each other, are rotatably supported in the shaft 6, and the rotary shaft 27 is integrally rotated on the side surface outside the case 46. Inserted into the rotary shaft 2
A coupling 54 for rotating together with 7 is provided. A top 56 is screwed onto the screw shaft 48, and the top 56 is movable in the axial direction by the rotation of the screw shaft 48. On the right side of FIG. 2 with respect to the top 56, the opening detection device 3
1 is arranged, and the opening detection device 31 has the first adjustment shaft 5
It is screwed to 0. By rotating the first adjustment shaft 50, the opening detection device 31 can be moved in the axial direction, and the axial position of the opening detection device 31 can be adjusted. Further, on the left side of the top 56 in FIG.
And the closing detection device 33 has a second adjustment shaft 52
It is screwed to. By rotating the second adjustment shaft 52, the closure detection device 33 can be moved in the axial direction, and the axial position of the closure detection device 33 can be adjusted. The open detection device 31 and the close detection device 33 have a frame 56.
The opening and closing of the slat 22 is detected by the abutment of the first adjusting shaft 50 and the second adjusting shaft 50 so that the slat 22 abuts the top 56 in the opened and closed position.
The adjustment shaft 52 is rotated to adjust the axial position where the open detection device 31 and the close detection device 33 are arranged.

Next, the operation when the electric blind 11 is attached to the inclined window as shown in FIG. 4 will be described. When the slat 22 is opened, the first winding drum 28 rotates in the direction in which the opening cord 26 is wound, and the second winding drum 38 rotates in the direction in which the closing cord 36 is unwound. However, due to an error in the rotational speeds of the two motors 30 and 40, the load of the slat 22 applied to the first motor 30, or the like, the rotational speed of the second motor 40 may be released.
When the unwinding amount of the closing cord 36 becomes larger than the winding amount of the opening cord 26,
The closing cord 36 is loosened, the second looseness detection device 44 detects the looseness, and the second motor 40 is stopped. As a result, only the first motor 30 is driven and only the opening cord 26 is wound on the first winding drum 28, so that the slack of the closing cord 36 is eliminated and the second slack detecting device 44 is operated. Since the slack is no longer detected, the second motor 40 is driven again, and the opening of the slat 22 is restarted. Therefore,
The slat 22 will not be opened while the closing cord 36 is loose. When the slat 22 is opened, the top 56 moves to the right in FIG. 2 by the rotation of the screw shaft 48 integrally with the first motor 30, and the slat 22 moves to the desired position adjusted by the limit unit 32. When the top is opened, the top 56 contacts the opening detection device 31. Thereby, the first motor 30
And rotation of the 2nd motor 40 stops and movement of slat 22 stops.

Next, when closing the slat 22, the first winding drum 28 rotates in the direction to unwind the opening cord 26, and the second winding drum 38 rotates in the direction to wind the closing cord 36. Then, the slat 22 is closed, but during this process, the rotation speed of the first motor 30 is changed to the first speed due to an error in the rotation speed of the two motors 30 and 40 or the load of the slat 22 applied to the second motor 40. 2 motor 40
When the unwinding amount of the opening cord 26 becomes larger than the winding amount of the closing cord 36, the opening cord 26 maintains a tension state due to its own weight of the bottom rail 20, but the closing cord is closed. 36 will be loosened,
The second slack detecting device 44 detects the slack to detect the first motor 30.
Stops. As a result, only the second motor 40 is driven and only the closing cord 36 is wound around the second winding drum 38, so that the slack of the closing cord 36 is eliminated and the second slack detecting device 44 operates. Since the slack is no longer detected, the first motor 30 is driven again, and the closing of the slat 22 is restarted. Therefore, the slat 22 is not closed while the closing cord 36 is loose. When closing the slats 22
When the screw shaft 48 rotates together with the first motor 30 to move to the left in FIG. 2, 6 is closed when the slat 22 is closed to a desired position adjusted by the limit unit 32. It contacts the detection device 33. As a result, the rotation of the first motor 30 and the second motor 40 is stopped, and the movement of the slat 22 is stopped.

Next, the operation when the electric blind 11 is attached to the horizontal window will be described. When the slat 22 is opened, it is the same as when it is attached to the inclined window, and the same effect can be obtained.

Next, when the slats 22 are closed, as shown in FIG. 5, unlike the case where the slats 22 are attached to the inclined windows, the slats 22 are sequentially moved from the slats 22 near the bottom rail 20. When the rotation speed of the first motor 30 becomes faster than the rotation speed of the second motor 40 during the closing, and the unwinding amount of the opening cord 26 becomes larger than the winding amount of the closing cord 36, the inclined window is opened. Unlike the case where the opening cord 26 is attached, the weight of the bottom rail 20 is not applied to the opening cord 26, so that the opening cord 26 is loosened.
The slack detection device 42 detects the slack and the first motor 30 stops. As a result, only the second motor 40 is driven and only the closing cord 36 is wound around the second winding drum 38, so that the slack of the closing cord 36 is eliminated and the second slack detecting device 44 operates. Since the slack is no longer detected, the first motor 30 is driven again to restart the closing of the slat 22. Therefore, as shown in FIG. 6, the slat 22 is not closed while the closing cord 36 is in a loosened state.

The stop of the first motor 30 and the second motor 40 when the slat 22 is opened and closed is determined by the rotation direction of the screw shaft 48 rotating integrally with the first motor 30 in the axial direction. Since the moved top 56 is brought into contact with the opening detecting device 31 or the closing detecting device 33, the top 56 is released when the slat 22 is released to a desired position adjusted by the limit unit 32 and when closed. Only the opening detection device 31 and the closing detection device 33 come into contact with each other, and the first motor 30 and the second motor 40 are rotatable in both the winding direction and the unwinding direction during opening and closing. ing. Therefore, when the opening and closing operations are switched during opening and closing of the slat 22, the first motor 30 and the second motor 40 can rotate in reverse. As a result, even when the electric blind 11 is attached to the horizontal window,
When the slat 22 is operated so as to be closed from the open state and opened again in the middle of the closing, the first motor 30 and the second motor 30
Since the motor 40 can also rotate, it can be normally opened even if switching is performed in the middle of closing.

[0019]

As described above, according to the first aspect of the present invention, when the opening cord or the closing cord becomes loose during the closing of the slat, the driving of the first motor is stopped, Since only the closing cord is wound around the second winding drum by driving only the second motor, the blind is not opened while the opening cord or the closing cord is loose. . Further, when the closing cord is loosened during the opening of the slat, the driving of the second motor is stopped and only the first motor is driven so that only the opening cord is wound on the first winding drum. Therefore, the blind is not closed while the closing cord is loose.

In the invention according to claim 2 of the present invention, since the top does not contact the opening detecting means and the closing detecting means during opening and closing, the first motor and the second motor are It is rotatable in both the winding direction and the unwinding direction, and when the opening and closing operations are switched during opening and closing, the first motor and the second motor rotate in reverse. Therefore, even when the blind is attached to the horizontal window, the first motor and the second motor can rotate when the slats are closed from the open state and then opened again during the closing process. It can be opened normally even by switching with.

[Brief description of the drawings]

FIG. 1 is a front view showing the entire electric blind of the present invention.

FIG. 2 is a perspective view showing a limit unit.

FIG. 3 is a circuit diagram of an electric drive unit.

FIG. 4 is a side sectional view when the electric blind is attached to the inclined window.

FIG. 5 is a side cross-sectional view showing a state in which the electric blind attached to the horizontal window is being closed.

FIG. 6 is a side sectional view showing a state in which an electric blind attached to a horizontal window is closed.

[Explanation of symbols]

 10a, 10b Window frame 11 Electric blind 12 First head box 14 Second head box 20 Bottom rail 22 Slat 26 Opening cord 28 First winding drum 30 First motor 36 Closing cord 38 Second winding drum 40 Second Motor 31 Opening detection device (opening detection means) 33 Closure detection device (closure detection means) 42 First slackness detection means 44 First slackness detection means 48 Screw shaft 56 Spindle

Claims (2)

[Claims] 1. A first head box (12) and a second head box (14) are respectively provided on a pair of window frames (10a, 10b) facing each other of a skylight or an inclined window, and the first headbox ( 12) and the second headbox (1
A bottom rail (20) is arranged between the first head box (12) and the bottom rail (20), and a large number of slats (22) are arranged in an aligned state. The first head box (12) has one end connected to the bottom rail (20) and the other end connected to the slat (22).
A first winding drum (28) in which the other end of the opening cord (26) inserted through the row and introduced into the first head box (12) is connected in a windable and unwound manner; A first motor (30) capable of rotationally driving a winding drum (28)
, And the second headbox (14) has one end connected to the bottom rail (20) and the other end introduced into the second headbox (14) for closing (36). ) Has a second winding drum (38) connected to the other end thereof so as to be able to wind and unwind, and a second motor (40) capable of rotationally driving the second winding drum (38). In the electric blind, the opening detection means (3) for detecting the release of the slat (22).
1), closure detection means (33) for detecting closure of the slats (22), first slack detection means (42) for detecting slack of the opening cord (26), and slack of the closure cord (36). And a second slack detecting means (44) for detecting that the first winding drum (28) rotates in the direction of winding the opening cord (26) and the second winding drum (38) closes. When the cord (36) is rotated in the unwinding direction, the first motor (30) is stopped when the opening detection means (31) detects the opening of the slat (22), and the second motor (30). 40) is a slat (2) by the opening detection means (31).
When the opening of 2) is detected, or when the slack of the closing cord (36) is detected by the second slack detecting means (44), the first winding drum (28) stops and the first winding drum (28) opens. When the second winding drum (38) rotates in the unwinding direction and the second winding drum (38) rotates in the winding direction of the closing cord (36), the first motor (30) causes the closing detection means (33). When the closing of the slat (22) is detected by the slat, or when the slack of the opening cord (26) is detected by the first slack detecting means (42), or by the second slack detecting means (44). When the slack of (36) is detected, the second motor (40) is configured to stop when the closure detection means (33) detects closure of the slat (22), Electric brie characterized by De. 2. The opening detecting means (31) and the closing detecting means (33) are a first motor (30) or a second motor (4).
0) screwed to the screw shaft (48) that rotates integrally with the screw shaft (48) moves axially by the rotation of the screw shaft (48), and the open detecting means (31) and the closing detecting means (3).
The electric blind according to claim 1, which is configured to stop the rotation of the first motor (30) and the second motor (40) by contacting with either one of 3).