JP2659641B2 - Screen drive for electric roll blind - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen driving device for an electric roll blind which draws out a screen in a horizontal state, an inclined state, or a curved surface.

[0002]

2. Description of the Related Art Referring to FIG. 4, an example of a conventional roll blind which is installed in a skylight or the like and which draws out a screen in a horizontal direction will be described. A screen 2 is wound between support brackets 1 fixed to a window frame or the like. A take-up shaft 3 to be taken is rotatably supported, and a weight bar 4 is attached to a leading edge of the screen 2.

A pulley 5 is provided near both ends of the weight bar 4.
a, 5b are supported, and both ends of a wire 6 mounted on both pulleys 5a, 5b are wound around pulleys 8a, 8b provided on a winding pipe 7, respectively. It is supported rotatably. Then, the winding pipe 7 is rotationally driven by a motor to
Is wound around pulleys 8a and 8b, so that the screen 2
Can be pulled out from the winding shaft 3, and a motor (not shown) provided in the winding shaft 3 is operated to rotate the winding shaft 3 so that the wire 6 is unwound from the pulleys 8 a and 8 b. The screen 2 can be wound around a winding shaft 3.

[0004]

However, in the above-described roll blind, when the wire 6 is wound around the pulleys 8a and 8b, the winding position of the wire 6 is changed to the pulleys 8a and 8b as shown by a chain line in FIG. To move in the wire 6
May be slanted with respect to the weight bar 4 and the winding pipe 7, which is not aesthetically pleasing.
The weight bar 4 may be pulled obliquely due to the uneven winding of the pulleys 8a and 8b, and the screen 2 may be loosened.

Further, since the drawing stroke of the screen 2 is defined by the length of the wire 6 that can be wound around the pulleys 8a and 8b, there is a problem that the allowable range of the drawing stroke is narrow.

Further, if the length of the take-up pipe 7 is substantially the same as the length of the weight bar 4, the pulleys 5a, 5b are moved from both ends of the weight bar 4 corresponding to the positions of the pulleys 8a, 8b of the take-up pipe 7. It needs to be mounted slightly closer to the center. For this reason, there is a problem that the wire 6 is exposed near the center of the moving range of the screen 2 and is not aesthetically pleasing. Therefore, when the take-up pipe 7 is lengthened in order to provide the pulleys 5a and 5b at both ends of the weight bar 4, there is a problem that a mounting space for the take-up pipe 7 becomes large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roll blind capable of preventing the wire from being wound around a take-up pipe and preventing the wire from being wound around the winding pipe, thereby enabling the screen to be driven stably. It is in.

[0008]

According to the present invention, to achieve the above object, a weight bar is attached to a tip of a screen wound around a winding shaft, and the weight bar is mounted on both ends of the weight bar. The wire is wound by a winding pipe driven by an electric motor, and the screen is pulled out from the winding shaft.
A screen driving device for an electric roll blind, wherein a screen can be wound on a winding shaft by a screen winding device provided on a winding shaft by unwinding the wire wound on a winding pipe. The pipe was movable in the axial direction of the winding pipe with the rotation, and the wire was wound on the winding pipe.

Further, the wire is guided through a pulley provided at both ends of the weight bar to a take-up pipe near a guide rail which movably supports both ends of the weight bar, and the wire is guided to the guide rail. And a pulley provided on a case supporting the take-up pipe.

[0010]

According to the above means, the wire is spirally wound around a winding pipe which moves in the axial direction while rotating, whereby the weight bar is pulled out and the screen is drawn out from the winding shaft. When the spirally wound wire is unwound, the screen is wound on the winding shaft.

[0011]

FIG. 1 shows an embodiment of the present invention.
3 will be described with reference to FIG. The same components as those in the conventional example will be described with the same reference numerals.

The roll blind shown in FIG. 1 allows the screen to be pulled out horizontally below a skylight, for example, and a winding bracket 3 is rotatably supported by a support bracket 1 fixed to a window frame 9. A weight bar 4 is attached to the end of the screen 2 wound around the winding shaft 3.

Both ends of the weight bar 4 are movably supported by guide rails 10 fixed to a window frame 9 or the like. The weight bar 4 moves along the guide rail 10 in the range up to. Pulleys 11a and 11b are attached to both ends of the weight bar 4, and pulleys 12a and 12b are also attached to the tip of the guide rail 10. The wire 6 mounted on each of the pulleys 11a and 11b is guided to the wire winding device 13 via the pulleys 12a and 12b.

The wire winding device 13 will be described with reference to FIGS. 2 and 3. A winding pipe 15 for the wire 6 is rotatably supported in a rectangular cylindrical case 14 fixed to a window frame or the like. . That is, a plate-like pipe bracket 16 is provided at two places on the left and right sides of the case 14.
And the pipe bracket 1 as shown in FIG.
6 has an insertion hole 17 through which the winding pipe 15 can be inserted. Roll bearings 18 are provided at positions around the insertion holes 17 at intervals of 120 degrees with respect to the center of the insertion holes 17, and the winding pipe 15 inserted into the insertion holes 17 is rotatably supported by the roll bearings 18. .

One end of the winding pipe 15 is screwed to a screw shaft 19 fixed to the case 14, and the other end is axially movable with respect to an output shaft (not shown) of a motor 20 fixed to the case 14. And they are integrally rotatably connected. Accordingly, the take-up pipe 15 is driven to rotate by the motor 20, and is moved in the axial direction by the action of the screw shaft 19 with the rotation.

The end of the wire 6 is connected to the pulley 12a, 1
2b guides along the axial direction of the winding pipe 15 from both sides of the case 14 into the case 14;
It is guided in the circumferential direction of the take-up pipe 15 via pulleys 21 a and 21 b provided in the inside 4, is wound around the outer peripheral surface of the take-up pipe 15, and is fixed by a fixed terminal 22.

In the roll blind constructed as described above, the motor 20 is operated to operate the winding pipe 15.
When the wire is rotated in the screen drawing direction, the winding pipe 15 moves in the axial direction while rotating, so that the wire 6 is spirally wound on the outer peripheral surface of the winding pipe 15 as shown in FIG. Then, as shown in FIG. 1, the weight bar 4 is pulled out along the guide rail 10 via the wire 6, and accordingly, the screen 2 is pulled out from the winding shaft 3.

On the other hand, when the motor in the winding shaft 3 is operated to rotate the winding shaft 3 in the screen winding direction, the wire 6 spirally wound around the winding pipe 15 is unwound. The screen 2 is wound around the winding shaft 3 until the weight bar 4 reaches the vicinity of the winding shaft 3 as shown by a chain line in FIG.

As described above, in this roll blind,
Both ends of the wire 6 are simultaneously spirally wound or unwound by a winding pipe 15 which moves in the axial direction while rotating. Accordingly, since both ends of the wire 6 are always wound up or unwound by the winding pipe 15 by the same length, the weight bar 4 is moved in a state parallel to the winding shaft 3 and the screen 2 is slackened. Never.

The wire 6 is guided in the vicinity of the guide rail 10 from the pulleys 11a and 11b at both ends of the weight bar 4 toward the pulleys 12a and 12b at the distal end of the guide rail 10, and the winding pipe 15 is pulled by the pulleys 12a and 12b. At the intermediate portion of the take-up pipe 15 via pulleys 21a and 21b. Accordingly, the wires 6 are located at both ends of the moving range of the screen 2 and are aesthetically preferable.

Further, since the wire 6 is guided to the intermediate portion of the take-up pipe 15 and taken up, the length of the take-up pipe 15 can be reduced irrespective of the length of the weight bar 4. The mounting space for the winding device 13 can be reduced.

Further, since the wire 6 is regularly spirally wound around the winding pipe 15, if the moving stroke is sufficiently secured, the winding amount of the wire 6 can be sufficiently secured. Can be sufficiently secured.

[0023]

As described above in detail, according to the present invention, the screen can be driven stably by preventing the wire from pulling out the screen and preventing the wire from being wound around the winding pipe while preventing the appearance from being deteriorated. It has an excellent effect of being able to provide an electric roll blind.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a wire winding device according to an embodiment.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 2 screen 3 winding shaft 4 weight bar 6 wire 10 guide rail 11a, 11b pulley 12a, 12b pulley 14 case 15 winding pipe 20 motor 21a, 21b pulley

Claims (2)

(57) [Claims] 1. A weight bar (4) is attached to an end of a screen (2) wound around a winding shaft (3), and wires (6) wound on both ends of the weight bar (4). ) Is driven by an electric motor (20).
The screen (2) is wound up in 5), the screen (2) is pulled out from the winding shaft (3), and the wire (6) wound on the winding pipe (15) is rewound to be provided on the winding shaft (3). In a screen drive device of an electric roll blind in which a screen (2) can be wound around a winding shaft (3) by a screen winding device, the winding pipe (15) rotates with the rotation of the winding pipe (15). 15) A screen driving device for an electric roll blind, wherein the wire (6) is wound around a winding pipe (15) thereof so as to be movable in the axial direction of (15). 2. The wire (6) comprises a weight bar (4).
A guide rail (10) that movably supports both ends of the weight bar (4) through pulleys (11a, 11b) provided at both ends of the weight bar (4) is guided toward a winding pipe (15). Connect the wire (6) to the guide rail (1
0) and the pulley (21) provided in the case (14) supporting the take-up pipe (15) and the pulley (21a, 12b) provided in the case (14).
The screen drive device for an electric roll blind according to claim 1, wherein the screen roll is wound around a winding pipe (15) through a and 21b).