JP2728348B2 - Roll screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll screen.

[0002]

2. Description of the Related Art In a conventional roll screen, when the screen is lowered to a lowermost position near the floor, the pull cord is first pulled down to a position where it can be lowered, and then the weight bar is lowered by holding the weight bar or the lower end of the screen. Lower until it is in position. Thus, the screen is completely lowered.

[0003]

However, in the conventional roll screen as described above, when the weight bar is lowered to the lowest position, the pull cord spreads on the floor surface, so that the pull cord is caught on the floor and falls down. In addition to this, there is a problem that the roll screen is suddenly applied with force by hooking or stepping on the roll screen, and the screen is broken or the screen winding mechanism is broken. Further, when the screen is stopped halfway, there is a problem that the pull cord goes down to the window surface and obstructs the view. An object of the present invention is to solve such a problem.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems by incorporating a lower take-up pipe capable of winding or unwinding a pull cord into a weight bar. In other words, the roll screen of the present invention has an upper take-up pipe rotatably supported at both ends by side plates at both ends of the set frame, and one end is connected to the upper take-up pipe and can be wound or unwound there. And a weight bar provided at the other end of the screen, and a force that drives the upper winding pipe in the screen winding direction always acts on the upper winding pipe. The other end of the screen is inserted from the upper opening formed in the upper longitudinal direction, and the other end of the screen is connected to a lower winding pipe disposed inside the weight bar so as to be wound or unwound. The lower take-up pipe is provided with a take-up spring that always applies a force to drive the lower take-up pipe in the screen take-up direction. The screen winding force of the lower winding pipe is set smaller than the screen winding force of the upper winding pipe, and the thickness of the screen at a predetermined position in the longitudinal direction of the screen is larger than the width of the upper opening of the weight bar. Is provided at the center of the screen in the width direction, a notch is formed from the lower end thereof to the position of the stopper belt, and a weight bar is provided at the center of the lower winding pipe in the axial direction. One end of a pull cord inserted from the lower opening of the weight bar is connected, and a knob having a radial dimension larger than the width dimension of the lower opening of the weight bar is attached to the other end of the pull cord. I do. The weight bar may be provided with a weight bar grip for moving the weight bar up and down.

[0005]

The screen is lowered to a position where the stopper belt is located slightly below the lowermost surface of the window frame. The screen is fixed by the stopper and the force pulling the weight bar downward is released. Thereby, the lower take-up pipe rotates by the elasticity of the take-up spring, and the screen from the stopper belt to the weight bar is taken up by the lower take-up pipe. At the same time, the pull cord is wound on the lower winding pipe. The lower take-up pipe stops rotating when the upper end of the weight bar contacts the stopper belt. At this time, the knob contacts the lower end of the weight bar. Thus, the weight bar is positioned on the lowermost surface of the window frame with the pull cord stored therein. Thus, even when the lowermost surface of the window frame is near the floor, the pull cord is not left on the floor. Further, even when the screen is stopped in the middle of the window, the pull cord does not hang down on the window surface. When the screen is raised, the stopper is released to allow the upper winding pipe to rotate freely. Thereby, the upper winding pipe winds the screen. When the weight bar comes into contact with the upper winding pipe, the upper winding pipe has a greater force to wind the screen than the lower winding pipe, so the screen is unwound from the lower winding pipe and wound around the upper winding pipe. Will be taken. At this time, since the lower take-up pipe rotates in the direction opposite to the direction at the time of screen take-up, the pull cord is unwound and hangs below the weight bar. Thus, when the screen is raised to the highest position, the pull cord can be automatically suspended from the lower end of the weight bar.

[0006]

FIG. 1 shows a roll screen 1 embodying the present invention.
0 is shown as a whole. Side plates 1 are provided at both ends of a set frame 12 for attaching a roll screen 10 to a window frame.
4 are provided. The upper winding pipe 16 is rotatably supported by the side plate 14. One end of a screen 18 is connected to the upper winding pipe 16 so as to be wound or unwound. In the upper winding pipe 16,
A force for driving the screen 18 in the winding direction is always exerted by a winding coil spring (not shown) provided on the screen. The other end of the screen 18 is connected to a weight bar 20. A weight bar grip 22 is attached to the lower end of the central portion of the weight bar 20, and one end of a pull cord 24 is connected to be able to be wound or unwound (see FIG. 2). Pull cord 2
A knob 26 is provided at the other end of 4. The screen 18 is provided with a stopper belt 28 at a predetermined position in the longitudinal direction thereof in the width direction. Further, a stopper belt 28 is provided at the center position in the width direction of the screen 18 from the lower end.
A notch 30 is formed up to the position (see FIG. 3).
The length from the lower end of the screen 18 to the stopper belt 28 is substantially the same as the length of the pull cord 24.

FIG. 2 shows a detailed view of the weight bar 20 portion.
FIG. 4 shows the weight bar 20 when the screen 18 is at the lowest position.
Are respectively shown in cross section. An upper opening 32 is formed on the entire upper surface of the weight bar 20 in the longitudinal direction. The other end of the screen 18 is inserted into the weight bar 20 from the upper opening 32. The width of the upper opening 32 is set smaller than the thickness of the stopper belt 28. A lower take-up pipe 34 is arranged in the weight bar 20, and the lower take-up pipe 34 has a screen 1.
The other end of 8 is connected so that winding and unwinding are possible. A force for driving the screen 18 in the winding direction always acts on the lower winding pipe 34 by a winding spring 36 provided on the lower winding pipe 34. The winding spring 3
The force acting on the lower winding pipe 34 due to 6 is set smaller than the force acting on the upper winding pipe 16.
One end of the pull cord 24 is connected to a central position in the axial direction of the lower winding pipe 34 so as to be able to be wound and unwound.
The other end of the pull cord 24 is inserted through a lower opening 40 formed in the lower part of the weight bar 20 and
Is connected to a knob 26 arranged outside the device. The width dimension of the lower opening 40 is set smaller than the radial dimension of the knob 26.

Next, the operation of the roll screen 10 of this embodiment will be described. For example, the screen 1 completely wound on the upper winding pipe 16 as shown in FIG.
When lowering 8 to the window frame lowermost surface near the floor, first, the knob 26 of the pull cord 24 is pulled down. As a result, the screen 18 is lowered. After the screen 18 is lowered by the pull cord 24 to a position where the weight bar grip 22 can be reached, the weight bar 20 is pulled down with the weight bar grip 22 until the screen 18 is completely unwound from the upper winding pipe 16. Next, the screen 18 is fixed by a stopper (not shown) provided on the roll screen 10. At this time, the screen 18 is set on the set frame 12.
, The stopper belt 28 is positioned slightly lower than the lowermost surface of the window frame. Next, the force for pulling the screen 18 downward is released. Accordingly, the lower take-up pipe 34 is rotated by the elasticity of the take-up spring 36, and takes up the screen 18 and the pull cord 24. Thereby, weight bar 2
0 rises and at the same time stores the pull cord 24 therein. The rotation of the lower winding pipe 34 stops when the stopper belt 28 contacts the upper end of the weight bar 20. Thus, the weight bar 20 is located slightly below the lowermost surface of the window frame, and the pull cord 24 can be completely housed inside (see FIG. 6). Thus, the pull cord does not spread on the floor. When raising the screen 18 from the state shown in FIG. 6, first, the stopper of the screen 10 is released. As a result, the upper winding pipe 16 rotates in a direction in which the screen 18 is wound by the winding spring, so that the screen 18 rises.
When the weight bar 20 rises to a position where it contacts the upper winding pipe 16, the upper winding pipe 16 has a greater force to wind the screen 18 than the lower winding pipe 34. The screen 18 that has been wound is unwound and wound up by the upper winding pipe 16. Thereby, the lower winding pipe 34 is connected to the screen 1
Because it rotates in the direction opposite to the direction of winding 8, pull cord 2
4 is unwound from the lower winding pipe 34. At this time, since the dimension from the stopper belt 28 to the lower end of the screen 18 and the dimension of the pull cord 24 are set to be substantially equal, when the screen 18 is completely wound on the upper winding pipe 16, FIG. As shown, the pull cord 24 is also completely unwound from the lower winding pipe 34. Thus, the pull cord 24 can be automatically hung from the weight bar 20 simultaneously with the winding of the screen 18. Also, when the screen 18 is stopped halfway, the lower take-up pipe 34 takes up the screen 18 and the pull cord 24 in the same manner as when the screen 18 is lowered, so that the pull cord 24 does not hang down from the lower end of the weight bar 20. . To further lower the screen 18 from this state, the weight bar 20 is lowered by holding the weight bar grip 22. As a result, the screen 18 and the pull cord 24 are first unwound from the lower winding pipe 34. After the screen 18 and the pull cord 24 are completely unwound, a force is applied to the screen 18 to pull the screen 18 downward. As the pipe 16 rotates, the screen 18 is unwound and descends further.

[0009]

According to the present invention, the weight bar is provided with a lower winding pipe to which a driving force is constantly applied in the screen winding direction, and the lower end of the screen and the upper end of the pull cord are connected to the lower winding pipe. When the lowering of the screen is stopped, the lower winding pipe can wind up the screen from the lower end by a predetermined size, and at the same time, can wind up all the pull cords. Thus, when the weight bar is lowered close to the floor, the pull cord does not spread on the floor, so that the pull cord is not trampled or entangled with the foot. Further, even when the screen is stopped in the middle of the window, the pull cord does not drop down to the window surface and obstructs the view.

[Brief description of the drawings]

FIG. 1 is a view showing a roll screen of the present invention.

FIG. 2 is a detailed view of a weight bar portion.

FIG. 3 is a detailed view of a screen.

FIG. 4 is a cross-sectional view of the weight bar when the screen is at the lowest position.

FIG. 5 is a view showing a roll screen when the screen is at its highest position.

FIG. 6 is a view showing a roll screen at the time of lowering the screen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roll screen 12 Set frame 14 Side plate 16 Upper winding pipe 18 Screen 20 Weight bar 22 Weight bar grip 24 Pull cord 26 Knob 28 Stopper belt 30 Notch 32 Upper opening 34 Lower winding pipe 36 Winding spring 40 Lower Aperture

Claims (2)

(57) [Claims] An upper winding pipe having both ends rotatably supported by side plates at both ends of a set frame; a screen having one end connected to the upper winding pipe and capable of being wound or unwound therewith; A weight bar provided at the other end of the screen, and a roll screen in which a driving force is constantly applied to the upper winding pipe in the screen winding direction. The other end of the screen is inserted from the upper opening formed in the direction, the other end of the screen is connected to a lower winding pipe disposed inside the weight bar so as to be wound or unwound, The lower take-up pipe is provided with a take-up spring that applies a force to constantly drive the lower take-up pipe in the screen take-up direction. The screen take-up force of the partial take-up pipe is set smaller than the screen take-up force of the upper take-up pipe, and at a predetermined position in the longitudinal direction of the screen, the thickness dimension is larger than the width dimension of the upper opening of the weight bar. A notch is formed at the center position in the width direction of the screen from the lower end thereof to the position of the stopper belt, and the lower portion of the weight bar is formed at the center position in the axial direction of the lower winding pipe. A roll connected to one end of a pull cord inserted from the opening, and a knob having a radial dimension larger than the width dimension of the lower opening of the weight bar attached to the other end of the pull cord; screen. 2. The roll screen according to claim 1, wherein the weight bar is provided with a weight bar grip for vertically moving the weight bar.