JP3243159B2 - Electric blinds - Google Patents

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 an inclined window.

[0002]

2. Description of the Related Art Conventional electric blinds for skylights or inclined windows are disclosed in Japanese Patent Application Laid-Open Nos. 4-247187 and 4-98996. That is, what is disclosed in JP-A-4-247187 is
First and second windows respectively provided on a pair of opposing window frames;
First and second rotary drums driven by motors are respectively supported in the head box, a bottom rail is disposed between the two head boxes, and a plurality of bottom rails are provided between the first head box and the bottom rail. The slats are provided in an aligned state, and one end is connected to the bottom rail, and the other end is inserted into the slat row and introduced into the first head box. The other end of the blind opening / closing cord is wound and wound on the first rotating drum. The other end of the tensioning cord, one end of which is connected to the bottom rail, is connected to the second rotating drum so as to be wound and unwound, and is connected to the first head box and the second head box. Is provided with a limit switch for detecting that the blind opening / closing cord or the tension cord has become loose and stopping the rotation of the rotary drum.

[0003] Japanese Unexamined Utility Model Publication No. 4-98996 discloses a motor driven by first and second motors in first and second headboxes provided in a pair of window frames facing each other. The first and second rotating drums are respectively supported on a shaft, a bottom rail is disposed between both head boxes, a plurality of slats are provided between the first head box and the bottom rail in an aligned state, and one end is provided. The other end of the opening cord is connected to the bottom rail and the other end is inserted into the first head box through the slat row, and the other end is connected to the first rotating drum so as to be wound and unwound, and one end is the bottom. The other end of the closing cord connected to the rail is connected to the second rotary 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 conventional electric blind as described above has the following problems. That is, in Japanese Patent Application Laid-Open No. 4-247187, there is no problem when this is attached to a horizontal window, but when it is attached to an inclined window, the blind is closed.
Ku when, unwinding speed of the first rotating drum is the higher than the winding speed of the second rotating drum, unwinding of closing cord becomes larger than the winding amount of tension cord. At this time,
The cord for opening and closing maintains the tensioned state due to the weight of the bottom rail, so the cord for tension is loosened, the limit switch is activated, and the rotation of the second motor is stopped.
Since the first motor continues to rotate, there is a problem that the blind closes with the tension cord loosened.

[0005] In Japanese Unexamined Utility Model Publication No. 4-98996, when this is mounted on a horizontal window and the blinds to be opened are closed, the second rotating drum is driven by a second motor. 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 drawn toward the second head box in this order. In this case, the first motor cannot operate because the limit switch may remain in contact until approaching. Therefore, the first
Since the rotating drum cannot take up 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 removed. There is a problem that the blind must be opened again after releasing the limit switch by separating from the first head box. An object of the present invention is to solve such a problem.

[0006]

Means for Solving the Problems To achieve the above-mentioned object, the invention according to claim 1 of the present invention comprises a pair of window frames (10a, 10b) which are respectively attached to a pair of opposed window frames (10a, 10b). One head box (12) and the second head box (1
4), a bottom rail (20) is arranged, and the first headbox (12) and the bottom rail (2) are arranged.
In the first headbox (12), one end is connected to the bottom rail (20) and the other end is connected to the slat (22). ) Row and the first head box (1
The other end of the opening cord (26) introduced into the second winding drum (2) is connected to the first winding drum (2) so as to be capable of winding and unwinding.
8) and a first driving drum capable of rotationally driving the first winding drum (28).
And a second headbox (14), one end of which is connected to the bottom rail (20) and the other end of which is introduced into the second headbox (14). A second take-up drum (38), the other end of which (36) is connected so as to be able to take up and unwind;
The second motor (4) capable of rotationally driving the winding drum (38)
0), is the built further, the opening detection means for detecting the release opening of the slat (22) (31), the slats (22)
Closing detecting means (33) for detecting the closing of the opening and first loosening detecting means (42) for detecting the loosening of the opening cord (26).
When the second slack detecting means for detecting the slack of the closing cord (36) (44) and is provided, the first winding drum (28)
Is rotated in the direction of winding the opening cord (26) and the second winding drum (38) is rotated in the direction of unwinding the closing cord (36), the first motor (30) is opened. When the opening of the slat (22) is detected by the detecting means (31), the motor stops when the opening of the slat (22) is detected by the opening detecting means (31). (2) Stop when the loosening of the closing cord (36) is detected by the loosening detecting means (44), the first winding drum (28) rotates in the direction of unwinding the opening cord (26), and the second winding drum (28) rotates. When the winding drum (38) rotates in the direction of winding the closing cord (36), the first motor (30) is turned on by the closing detecting means (33).
When the closing of 2) is detected, or when the loosening of the opening cord (26) is detected by the first loosening detecting means (42), the second motor (40) is stopped by the closing detecting means (33). ) To a motorized blind configured to stop when the closure of the slat (22) is detected by
Here, the first winding drum (28) is connected to the release cord (2).
6) is rotated in the unwinding direction, and the second winding drum (38) is rotated.
Is rotated in the direction of winding the closing cord (36)
The first motor (30) is provided with a second slack detecting means (44).
When the loosening of the closing cord (36) is detected by
Is also stopped .

When the blind is opened, the first winding drum rotates in the direction of winding the opening cord, and the second winding drum rotates in the direction of unwinding the closing cord. When the speed is higher than the rotation speed of the first motor and the unwinding amount of the closing cord is larger than the winding amount of the opening cord, the closing cord is attached to both the inclined window and the horizontal window. The second motor stops when the loosening of the closing cord is detected, so that only the first motor is driven and the first winding drum winds only the opening cord. As a result, since the loosening of the closing cord is eliminated, the second motor is driven again and the opening of the slat is restarted, so that the slat is opened with the closing cord loosened. Disappears.

When closing the blind, the first
The winding drum rotates in the direction to unwind the release cord, and the second
The winding drum rotates in the direction of winding the closing cord,
When the rotation speed of the first motor is higher than the rotation speed of the second motor and the amount of unwinding of the opening cord is greater than the amount of winding of the closing cord, the closing cord is attached to the inclined window. However, when it is attached to a horizontal window, the opening cord is loosened, but the first motor stops when either the opening cord or the closing cord is detected, so only the second motor is turned off. When driven, only the second winding drum winds the closing cord. As a result, since the loosening of the opening cord and the closing cord is eliminated, the first motor is driven again, and the closing of the slat is restarted. The slat will not be closed as it is.

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

When the first motor and the second motor rotate in the slat opening direction, the top of the screw shaft moves to one side of the screw shaft by the rotation of the screw shaft which rotates integrally with the first motor and the second motor. The rotation of the first motor and the second motor stops. Further, when the first motor and the second motor rotate in the slat closing direction, the rotating direction of the screw shaft is opposite to the above, so that the top moves to the other side of the screw shaft and contacts the closing detecting means, The rotation of the first motor and the second motor stops. As described above, the top only comes into contact with the opening detecting means and the closing detecting means only 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, when the opening and closing of the slat are switched during the opening and closing of the slat, the first motor and the second motor rotate in reverse. Thereby, even when the blind is attached to the horizontal window, if the blind is closed from the open state and operated so as to be opened again during the closing, both the first motor and the second motor can be rotated. It can be opened normally on the way.

[0011]

FIG. 1 shows an electric blind 11 embodying the present invention. A first head box 1 is provided on a pair of window frames 10a and 10b opposite to a skylight or an inclined window, respectively.
The second and second headboxes 14 are brackets 16 and 1
8, the first head box 12
Between the bottom head 20 and the second head box 14.
Is arranged. A large number of slats 22 are supported between the first head box 12 and the bottom rail 20 by a ladder cord 21 shown in FIG.
The two guide wires 24 that pass through the bottom rails 20 and the slats 22 and support the bottom rails 20 and the slats 22 are provided at predetermined intervals in the longitudinal direction of the first head box 12 and the second head box 14. Each is erected with a space. In the first head box 12,
One end is connected to the bottom rail 20 and the other end is inserted into the first head box 12 through the row of slats 22, and the other end of the opening cord 26 is connected to be able to be wound and unwound, and Two first winding drums 28 connected such that the upper ends of the ladder cords 21 rotate integrally with each other by a predetermined range angle, and the first winding drums 2
A first motor 30 capable of rotating the motor 8 via a rotating shaft 27, and an opening detecting device (opening detecting means) 31 described later
And a limit unit 32 having a closure detection device (closure detection means) 33. A signal line 34 is led out of the first headbox 12, and the first motor 30
Is connected to a 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.
And a second motor 40 capable of rotating and driving the second winding drum 38 via a rotating shaft 39. The second winding drum 38 has the other end connected to be capable of winding and unwinding. A signal line 37 extends from the second head box 14 and is connected to a 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, a first slack detecting device 42 for detecting the slack of the opening cord 26 is provided.
The second slack detecting device 44 for detecting the slack of the closing cord 36 is provided at the position where the closing cord 36 of the second head box 14 is led out.

The controller 35, the first motor 30, the second
The motor 40, the opening detecting device 31, the closing detecting device 33, the first slack detecting device 42 and the second slack detecting device 44
Are connected as shown in the circuit of FIG.
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 do not flow through the first motor 30 and the second motor 40, respectively, so that both of them stop rotating. When the second slack detecting device 44 detects the slack of the closing cord 36 and closes, 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
Since U2 stops flowing, the first motor 30 continues to rotate, and the second motor 40 stops rotating. When the slat 22 is closed, a current ID flows from the controller 35 as shown in FIG. 3, the first winding drum 28 rotates in a direction for unwinding the opening cord 26, and the second winding drum 38 Rotates in the direction in which the closing cord 36 is wound. When the closing detection device 33 detects the closing of the slat 22 and opens it, the current ID1 and the current ID2 do not flow through the first motor 30 and the second motor 40, respectively, so that both of them stop rotating. When the first slack detecting device 42 detects the slack of the opening cord 26 and opens it, the first motor 30
Current ID1 does not flow through the motor and stops. When the second slack detecting device 44 detects the slack of the closing cord 36 and closes, the relay 60 is activated to operate the first contact 62 and the second contact 6.
4, the current ID1 stops flowing 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 is a perspective view of the limit unit 32. Case 4 fixed to first head box 12
A screw shaft 48, a first adjustment shaft 50, and a second adjustment shaft 52, which are arranged in parallel with each other, are rotatably supported in the inside 6, and the rotation shaft 27 rotates integrally with the side surface outside the case 46. And the screw shaft 48 is
A coupling 54 is provided to rotate integrally with the coupling 7. A top 56 is screwed into the screw shaft 48, and the top 56 is movable in the axial direction by rotation of the screw shaft 48. On the right side of the frame 56 in FIG.
1 is disposed, and the opening detection device 31 is connected to 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 in FIG.
Is disposed, and the closing detection device 33 is provided with a second adjustment shaft 52.
Is screwed into. 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 opening detecting device 31 and the closing detecting device 33 are provided with
The first adjustment shaft 50 and the second adjustment shaft 50 are positioned so that the slat 22 contacts the frame 56 at the position where the slat 22 is opened and closed.
By rotating the adjustment shaft 52, the axial position where the open detection device 31 and the close detection device 33 are arranged is adjusted.

Next, the operation when the electric blind 11 is mounted on an 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 of winding the opening cord 26, and the second winding drum 38 rotates in the direction of unwinding the closing cord 36. During this process, the rotation speed of the second motor 40 decreases due to an error in the rotation speed of the two motors 30 and 40 or the load of the slats 22 applied to the first motor 30.
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 slackened, the second slack detector 44 detects slack, and the second motor 40 stops. 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 Since the loosening is no longer detected, the second motor 40 is driven again, and the opening of the slat 22 is restarted. Therefore,
The slat 22 is not opened while the closing cord 36 is loose. When the slat 22 is opened, the top 56 is moved rightward in FIG. 2 by rotating the screw shaft 48 integrally with the first motor 30, and the slat 22 is moved to a desired position adjusted by the limit unit 32. When the frame 56 is fully opened, the frame 56 contacts the opening detection device 31. Thereby, the first motor 30
Then, the rotation of the second motor 40 stops, and the movement of the slat 22 stops.

Next, when the slat 22 is closed, the first winding drum 28 rotates in the direction of unwinding the opening cord 26, and the second winding drum 38 rotates in the direction of winding the closing cord 36. Then, the slat 22 is closed, but during this time, the rotation speed of the first motor 30 is reduced to the second 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 tensioned state by the weight of the bottom rail 20, but the closing cord 36 becomes slack,
The second slack detecting device 44 detects slack and detects the first motor 30.
Stops. As a result, only the second motor 40 is driven and only the closing cord 36 is wound on the second winding drum 38, so that the slack of the closing cord 36 is eliminated and the second slack detecting device 44 Since the loosening 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 slat 22,
6 moves leftward in FIG. 2 by the rotation of the screw shaft 48 integrally with the first motor 30, and the top 56 closes when the slat 22 is closed to a desired position adjusted by the limit unit 32. It contacts the detection device 33. Thus, 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 mounted on a horizontal window will be described. When the slat 22 is opened, it is the same as when the slat 22 is mounted on the inclined window, and the same effect can be obtained.

Next, when the slats 22 are closed, unlike the case where the slats 22 are attached to the inclined window, as shown in FIG. During the closing, when the rotation speed of the first motor 30 becomes higher than the rotation speed of the second motor 40 and the unwinding amount of the opening cord 26 becomes larger than the winding amount of the closing cord 36, Unlike the case where it is attached, since the weight of the bottom rail 20 is not applied to the opening cord 26, the opening cord 26 is loosened, and the first cord is loosened.
The slack detecting 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 on the second winding drum 38, so that the slack of the closing cord 36 is eliminated and the second slack detecting device 44 Since the loosening is no longer detected, the first motor 30 is driven again, and the closing of the slat 22 is restarted. Therefore, as shown in FIG. 6, the slat 22 is not closed while the closing cord 36 is loose.

When the slat 22 is opened and closed, the first motor 30 and the second motor 40 are stopped in the axial direction by the rotation direction of the screw shaft 48 that rotates integrally with the first motor 30. Since the moved frame 56 is performed by abutting the opening detection device 31 or the closing detection device 33, the frame 56 is released when the slat 22 is released to the desired position adjusted by the limit unit 32 and when the slat 22 is closed. 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 the opening and closing of the slat 22, the first motor 30 and the second motor 40 can rotate in the reverse direction. Thereby, even when the electric blind 11 is attached to the horizontal window,
When the slat 22 is closed from the open state and opened again during the closing, the first motor 30 and the second motor
Since the motor 40 can also rotate, it can be normally opened even if the switching is performed during the closing.

[0019]

As described above, according to the first aspect of the present invention, even if the opening cord or the closing cord is loosened during closing of the slat, the first aspect of the present invention is not limited to the first cord.
Since driving of the motor is stopped, only the second motor is driven, in order to allow wound only closing code to the second winding drum, remains that open cord or closing code slack blinds Will not be closed . Further, when the closing cord is loosened during 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 opened while the closing cord is loosened.

According to the second aspect of the present invention, since the top does not contact the open detecting means and the closed detecting means during the opening and closing, the first motor and the second motor are The first motor and the second motor rotate in the reverse direction when the operation of opening and closing is switched during opening and closing during opening and closing. Therefore, even when the blind is attached to the horizontal window, if the slat is closed from the open state and operated to be opened again during the closing, both the first motor and the second motor can be rotated. It can be opened normally even if it is switched by.

[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 unit.

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

FIG. 5 is a side 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 code 38 Second winding drum 40 Second Motor 31 Open detection device (open detection device) 33 Close detection device (close detection device) 42 First slack detection device 44 First slack detection device 48 Screw shaft 56 Top

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E06B 9/322

Claims (2)

(57) [Claims] 1. A pair of opposing window frames (10a, 10b).
First head box (12) attached to each
A bottom rail (20) is arranged between the first head box (12) and the bottom rail (20), and a number of slats (22) are arranged between the first head box (12) and the bottom rail (20). 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 so as to be wound and unwound; First motor (30) capable of rotationally driving winding drum (28)
The second headbox (14) has a closing cord (36) having one end connected to the bottom rail (20) and the other end introduced into the second headbox (14). the other end a second winding drum, which is linked to solve winding and winding (38), a second motor rotatable drives the second winding drum (38) (40), is incorporated, further , first slack detecting the slat (22) opening detection means (31) for detecting the release opening of the slats (22) closing detecting means for detecting the closure of (33), the slack of the opening code (26) Detecting means (42) and closing code (3
Second slack detecting means for detecting the loosening of 6) (44) and is set
When the first winding drum (28) rotates in the direction of winding the opening cord (26) and the second winding drum (38) rotates in the direction of unwinding the closing cord (36), The first motor (30) stops when the opening detection means (31) detects the opening of the slat (22), and the second motor (40) stops the slat (2) by the opening detection means (31).
When the opening of 2) is detected, or when the loosening of the closing cord (36) is detected by the second slack detecting means (44), the operation is stopped, and the first winding drum (28) is turned off by the opening cord (28). 26) in the direction of unwinding, and when the second winding drum (38) rotates in the direction of winding the closing cord (36), the first drum is rotated.
The motor (30) stops when the closing detection means (33) detects that the slat (22) is closed, or when the first looseness detecting means (42) detects that the opening cord (26) is loose. and, second motor (40) includes an electric Bligh closure of the slat (22) by the closing detection means (33) is configured to stop when it is detected
In command, first wind-up drum (28) is wound an open code (26)
Rotating in the unwinding direction, the second winding drum (38) is closed
When the cord (36) is rotated in the winding direction, the first
The motor (30) is closed by the second slack detecting means (44).
Stop when slack in chain code (36) is detected
Electric blind, characterized in that that. The open detection means (31) and the close detection means (33) are provided with a first motor (30) or a second motor (4).
The top (56) screwed to the screw shaft (48) that rotates integrally with the screw shaft (0) moves in the axial direction by the rotation of the screw shaft (48), and the open detection means (31) and the close detection means (3).
2. The electric blind according to claim 1, wherein the electric blind is configured to stop rotation of the first motor (30) and the second motor (40) by abutting on one of the three.