JPH05171882A - Screen driving device of motor driven roll blind - Google Patents

Abstract

PURPOSE:To promote the beauty of a motor driven roll blind and to stabilize a screen to make it possible to drive it. CONSTITUTION:A weight bar 4 is provided to the front end of a screen 2 wound on a winding shaft 3, and a wire 6 wrapped in both ends of the weight bar 4 is wound with a winding pipe 15 rotated and driven by an electric motor to make it possible to draw the screen 2 from the winding shaft 3. The screen 2 can be wound on the winding shaft 3 while rewinding the wire 6 wound on the winding pipe 15 by a screen winder provided to the winding shaft 3. The winding pipe 15 can be moved in the direction of the axis of the winding pipe 15 with the rotation thereof, and the wire 6 is wound on the winding pipe 15 in a spiral shape.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art An example of a conventional roller blind installed on a skylight or the like and configured to draw a screen horizontally will be described with reference to FIG. 4. A screen 2 is wound between support brackets 1 fixed to a window frame or the like. A take-up shaft 3 is rotatably supported, and a weight bar 4 is attached to the tip edge of the screen 2.

Pulleys 5 are provided near both ends of the weight bar 4.
a and 5b are supported, and both ends of the wire 6 hung on both pulleys 5a and 5b are respectively wound around pulleys 8a and 8b provided on a winding pipe 7, and the winding pipe 7 is a window frame or the like. It is rotatably supported by. Then, the winding pipe 7 is rotated by a motor to rotate the wire 6
The screen 2 by winding it around the pulleys 8a and 8b.
Can be pulled out from the winding shaft 3, and a motor (not shown) provided in the winding shaft 3 is operated to drive the winding shaft 3 to rotate, thereby rewinding the wire 6 from the pulleys 8a and 8b. The screen 2 can be wound around the winding shaft 3.

[0004]

However, in the roll blind as described above, when the wire 6 is wound around the pulleys 8a and 8b, the winding position of the wire 6 is the pulleys 8a and 8b as shown by the chain line in FIG. Wire 6 for moving in
May be slanted with respect to the weight bar 4 and the take-up pipe 7, which is aesthetically unfavorable.
Due to uneven winding around the pulleys 8a and 8b, the weight bar 4 may be pulled obliquely 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 which 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 made substantially the same as the length of the weight bar 4, the pulleys 5a and 5b are connected to the pulleys 8a and 8b of the take-up pipe 7 from both ends of the weight bar 4, respectively. It needs to be mounted slightly closer to the center. Therefore, there is a problem in that the wire 6 is exposed toward the center of the moving range of the screen 2 and is not aesthetically pleasing. Therefore, if 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 the installation space of the take-up pipe 7 becomes large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a roll blind capable of stably driving a screen by preventing unevenness of winding of a wire around a winding pipe while preventing deterioration of appearance due to a wire for pulling out the screen. It is in.

[0008]

In order to achieve the above object, the present invention has a weight bar attached to the tip of a screen wound around a winding shaft, and attached to both ends of the weight bar. Take up the wire from the take-up shaft by taking up the wire with the take-up pipe that is rotated by the electric motor,
In a screen drive device of an electric roll blind capable of winding a screen around a winding shaft by a screen winding device provided on a winding shaft by rewinding the wire wound around a winding pipe, The pipe was allowed to move in the axial direction of the winding pipe with the rotation thereof, and the wire was wound around the winding pipe.

Further, the wire is guided toward a winding pipe in the vicinity of guide rails movably supporting both ends of the weight bar through pulleys provided at both ends of the weight bar, and the wire is guided to the guide rail. The take-up pipe is wound on the take-up pipe and the take-up pulley provided on the case supporting the take-up pipe.

[0010]

By the above means, the wire is spirally wound around the winding pipe which moves in the axial direction while rotating, and the weight bar is pulled out accordingly, and the screen is pulled out from the winding shaft. When the spirally wound wire is unwound, the screen is wound around the winding shaft.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIG.
~ It demonstrates according to FIG. The same components as those of the conventional example will be described with the same reference numerals.

In the roll blind shown in FIG. 1, for example, a screen can be pulled out horizontally in the lower part of a skylight or the like, and a winding shaft 3 is rotatably supported by a support bracket 1 fixed to a window frame 9. A weight bar 4 is attached to the tip of the screen 2 wound around the winding shaft 3.

Both ends of the weight bar 4 are movably supported by a guide rail 10 fixed to a window frame 9 and the like, and a tip end portion of the guide rail 10 from a base end portion on the winding shaft 3 side to an opposite side thereof. 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 end portion of the guide rail 10. The wire 6 hooked 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, plate-shaped pipe brackets 16 are provided at two places on the left and right sides of the case 14.
Fixed to its pipe bracket 1 as shown in FIG.
An insertion hole 17 through which the take-up pipe 15 can be inserted is formed in the central portion of 6. Roll bearings 18 are provided at 120-degree intervals with respect to the center of the insertion hole 17 at positions around the insertion hole 17, and the winding pipe 15 inserted into the insertion hole 17 is rotatably supported by the roll bearing 18. ..

One end of the winding pipe 15 is screwed into 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. In addition, they are integrally and rotatably connected. Therefore, the winding pipe 15 is rotationally driven by the motor 20 and is moved in the axial direction by the action of the screw shaft 19 in accordance with the rotation.

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

In the roll blind constructed as described above, the motor 20 is actuated to operate the winding pipe 15.
When 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 around 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 with this, 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. Then, as shown by the chain line in FIG. 1, the screen 2 is wound around the winding shaft 3 until the weight bar 4 reaches the vicinity of the winding shaft 3.

As described above, in this roller blind,
Both ends of the wire 6 are simultaneously spirally wound or unwound on the winding pipe 15 that moves in the axial direction while rotating. Therefore, since both ends of the wire 6 are always wound 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 loosened. There is no such thing.

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

Further, since the wire 6 is guided to the middle portion of the take-up pipe 15 and taken up, the length of the take-up pipe 15 can be shortened regardless of the length of the weight bar 4. As a result, the wire 6 can be wound. The installation space for the winding device 13 can be reduced.

Further, since the wire 6 is regularly wound around the winding pipe 15 in a spiral shape, a sufficient winding amount of the wire 6 can be secured by sufficiently securing the moving stroke thereof. It is possible to secure a sufficient withdrawal amount.

[0023]

As described in detail above, according to the present invention, it is possible to stably drive the screen by preventing the winding unevenness of the wire with respect to the winding pipe while preventing the deterioration of the appearance due to the wire for pulling out the screen. It has the excellent effect of being able to provide an electric roller blind.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view showing a wire winding device of an embodiment.

3 is a cross-sectional view taken along the line AA in FIG.

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 rails 11a, 11b pulleys 12a, 12b pulley 14 case 15 winding pipe 20 motors 21a, 21b pulley

Claims (2)

[Claims] 1. A weight bar (4) is attached to the tip of a screen (2) wound around a winding shaft (3), and a wire (6) is attached to both ends of the weight bar (4). ) Is driven by an electric motor (20) to rotate a winding pipe (1
It is provided on the winding shaft (3) by winding up the screen (2) from the winding shaft (3) by winding it up at 5), and rewinding the wire (6) wound around the winding pipe (15). In a screen drive device of an electric roll blind capable of winding the screen (2) around the winding shaft (3) by the screen winding device, the winding pipe (15) is rotated by the winding pipe (15). 15) A screen drive device for an electric roller blind, which is movable in the axial direction of 15) and is configured to wind the wire (6) around the winding pipe (15). 2. The wire (6) is a weight bar (4).
Guide rails (10) near the guide rails (10) that movably support both ends of the weight bar (4) are guided toward the winding pipe (15) via pulleys (11a, 11b) provided at both ends of the Connect the wire (6) to the guide rail (1
Pulleys (12a, 12b) provided in (0) and the pulley (21) provided in the case (14) supporting the take-up pipe (15).
The screen drive device for an electric roller blind according to claim 1, wherein the screen drive device is wound around a winding pipe (15) via (a, 21b).