JP2003214068A - Roll screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roll screen capable of dispensing with a vertical movement of a screen when desiring to adjust the quantity of light. <P>SOLUTION: This roll screen has a first screen 18, and a second screen 19 arranged in parallel in the rear of the first screen 18. The first screen 18 and the second screen 19 have parts 18a, 18b, 19a, and 19b having respectively different transmissivity. A longitudinal distance of the first screen 18 and the second screen 19 can be changed. The quantity of light can be adjusted by changing this longitudinal distance. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll screen, and more particularly to a roll screen capable of adjusting the amount of light using a plurality of screens.

[0002]

2. Description of the Related Art Conventionally, as this type of roll screen, the one described in Japanese Utility Model Laid-Open No. 62-190092 is known. According to this, a plurality of sheets in which a large number of elongated light-transmitting portions are arranged side by side at a predetermined interval on a substantially rectangular sheet are stacked so that the light-transmitting portions have the same elongated direction, and at least one of the sheets is made transparent. It is equipped with a mechanism for sliding the optical part in a direction orthogonal to the elongated direction. As this mechanism, a rotating body to which the upper end of the sheet is connected and a rotating knob for rotating the rotating body are provided. By rotating the rotating knob, the rotating body is rotated, and the sheet is moved in the elongated direction. It can be slid in the orthogonal direction. When the light-transmitting portions of the sheets are aligned in the elongated direction, the amount of light passing through the sheet becomes maximum, and the light-transmitting portions of the sheets are overlapped with the non-light-transmitting portions between the light-transmitting portions of other sheets. It is described that the shielding is performed stepwise.

[0003]

However, in the device described in the above publication, when the sheet is slid upward to adjust the light amount by sliding the sheet up and down, the lower side of the sheet is opened. There is a risk that the amount of light will leak from there. Alternatively, the height of the plurality of sheets may vary, and the appearance may deteriorate. In order to avoid such a problem, the seat has to be made endless as shown in one embodiment of the above publication, but in that case, the seat cannot be completely opened.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a roll screen capable of eliminating the vertical movement of the screen when the amount of light is desired to be adjusted.

[0005]

In order to achieve the above-mentioned object, a roll screen according to the invention of claim 1 has a first screen and a second screen which is arranged in parallel behind the first screen. However, the first screen and the second screen have portions having different light transmittances, respectively, and the distance in the front-rear direction between the first screen and the second screen can be changed, and the distance can be changed. It is characterized in that the light quantity can be adjusted accordingly. First
By changing the distance between the screen and the second screen in the front-rear direction, the amount of light can be adjusted, so that it is not necessary to vertically move one screen to adjust the amount of light as in the conventional case, and therefore the light shielding is performed. It is possible to avoid opening the lower side of the screen when doing. Further, by connecting at least one of the first screen and the second screen to the take-up pipe so that the screen can be taken up, and raising and lowering the screen by rotating the take-up pipe, various screen modes can be realized.

According to a second aspect of the invention, the first screen and the second screen both have a high transmissive portion having a high light transmittance and a low transmissive portion having a low light transmittance. And the second screen satisfy a predetermined height relationship, the portion corresponding to the high transmissive portion of the first screen becomes the second
It is characterized in that it is a low-transmission portion of the screen and a portion corresponding to the high-transmission portion of the second screen is a low-transmission portion of the first screen. This makes the first
When the distance between the first screen and the second screen in the front-rear direction is reduced when the screen and the second screen satisfy a predetermined height relationship, the low transmission part of one screen is changed to the high transmission part of the other screen. To overlap with
It is possible to block light. The patterns on the first screen and the second screen can be arbitrary patterns.

According to a third aspect of the invention, the first screen and the second screen both have a high transmissive portion having a high light transmittance and a low transmissive portion having a low light transmittance. And the second screen satisfy a predetermined height relationship, the low transmission part of the first screen covers the high transmission part of the second screen, and the low transmission part of the second screen is
It is characterized by covering the high-transmission part of the screen. Accordingly, when the first screen and the second screen satisfy a predetermined height relationship, if the distance between the first screen and the second screen in the front-rear direction is reduced, the low-transmission portion of one screen is changed to the other. Since the highly transparent portion of the screen is covered, the light can be surely shielded.

According to a fourth aspect of the present invention, in the third aspect, the second screen is provided corresponding to the low-transmission portion of the first screen.
The screen is a high-transmission part similar to the low-transmission part of the first screen, or the first screen corresponds to the low-transmission part of the second screen, and the first screen is a high-transmission part similar to the low-transmission part of the second screen. It is characterized by being a transparent portion. The first screen and the second screen can be designed to have patterns similar to each other, and each pattern can be enjoyed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overall view of a roll screen according to a first embodiment of the present invention. In the figure, a roll screen 10 has a pair of side plates 14 attached to both ends of a set frame 12 attached to a window frame or the like by a bracket or the like, and two winding pipes are provided between the pair of side plates 14. 16, 1
7 is rotatably supported. The take-up pipe 16 and the take-up pipe 17 have different front and rear positions.
7 are arranged in parallel behind the winding pipe 16. One ends of screens 18 and 19 are connected to the winding pipes 16 and 17, respectively, and the screens 18 and 19 can be wound and unwound on the winding pipes 16 and 17, respectively.
Weight bars 20 and 21 are connected to the lower ends of the screens 18 and 19, respectively.

Although not shown, the winding pipes 16 and 17
Includes a winding spring that applies a force to the winding pipes 16 and 17 to rotate the winding pipes 16 and 17 in the screen winding direction at all times, and a state and a rotation that stop the rotation of the winding pipes 16 and 17. A stopper device for switching to the state is provided.

When the stoppers are released by pulling the screens 18 and 19 downward a little, the winding pipes 16 and 17 are released.
Can be rotated, and the winding pipes 16 and 17 rotate in the screen winding direction due to the accumulated force of the winding spring. As a result, the screens 18 and 19 are taken up by the take-up pipes 16 and 17, and the respective weight bars 20 and 21 can rise (in FIG. 2, only the weight bar 20 of the screen 18 is raised). Represents). Alternatively, when the screens 18 and 19 are pulled downward as they are, the stopper device allows the winding pipes 16 and 17 to rotate in the screen unwinding direction, and the screens 18 and 19 are unwound from the winding pipes 16 and 17, The weight bars 20 and 21 can be lowered. When the lowering operation of the screens 18 and 19 is stopped at an arbitrary height, the stopper device is activated and the screens 18 and 19 are maintained at the arbitrary height in order to prohibit the rotation of the take-up pipes 16 and 17. To be done.

The screens 18 and 19 have portions having different light transmittances. Although two or more types of different transmissivity can be used, in this example, the screen 18 has the high transmissive portion 1 having a high transmissivity for transmitting light.
8b, and a low-transmission part 1 that shields almost all light and has a low transmittance.
8a. Similarly, the screen 19 has a high transmissive portion 19b having a high transmissivity that transmits light and a low transmissive portion 19a having a low transmissivity that almost shields light. In a state where the heights of the two screens 18 and 19 are substantially the same, the portion corresponding to the high transmission portion 18b of the screen 18 is the low transmission portion 19a of the screen 19. A portion of the screen 19 corresponding to the high transmission portion 19b is a low transmission portion 18a of the screen 18. That is, the screen 18 and the screen 19 have inverted transmissivity relationships, and the high transmissive portions 18 b and 19 b and the low transmissive portion 18
An arbitrary pattern can be formed by combining with a and 19a. As shown in FIG. 3, this screen 1
8 and the relationship between the high transmission portion and the low transmission portion of the screen 19,
It can be completely inverted from each other. In this case, the area and shape of the high-transmission portion 18b and the corresponding low-transmission portion 19a can be made completely the same, and the area and the shape of the low-transmission portion 18a and the corresponding high-transmission portion 19b can be made the same. It is not limited to this. As shown in FIG. 3, the low-transmission portion 18a and the high-transmission portion 19b corresponding to the low-transmission portion 18a can have similar shapes (instead, the high-transmission portion 18b and the low-transmission portion 19a corresponding thereto can be formed).
Can be a similar shape). And the low transmission part 1
The low transmission part 19 is formed so that 9a covers the high transmission part 18b.
The area of a is slightly larger than the area of the high transmission portion 18b, and the area of the low transmission portion 18a is larger than the area of the high transmission portion 19b so that the low transmission portion 18a covers the high transmission portion 19b. It should be a little bigger. By doing this, 2
When the two screens 18 and 19 are overlapped with each other, the low transmission parts 18a and 19a and the high transmission part 18b,
It is possible to cover 18a and cover the entire screen, and to completely shield light.

As shown in FIGS. 4 and 5, arc-shaped guide paths 14a are formed in the pair of side plates 14, and each guide path 14a has a bar 24 as a distance adjusting member. Both ends are slidably fitted. The bar 24 is arranged on the front side of the winding pipe 16, and one end of the bar 24 penetrates the guide path 14a and is connected to the movable lever 25. The movable lever 25 is connected to a pulley 26 axially supported on the side of one side plate 14, and an operation cord 28 is wound around the pulley 26. These bars 24, movable lever 2
5, the pulley 26 and the operation cord 28 constitute a distance adjusting mechanism for adjusting the distance between the two screens 18 and 19. By operating the operation cord 28 to rotate the pulley 26, the movable lever 25 can be moved to move the bar 24 along the guide path 14a. Bar 2
By changing the position in the front-back direction along the guide path 14a, 4 contacts the screen 18 in accordance with the position and regulates the position where the screen 18 hangs. The distance in the front-back direction can be changed (see FIGS. 4 to 7).

In the roll screen constructed as described above, FIGS. 4 and 6 show a state in which the distance between the screen 18 and the screen 19 is widest, and FIGS. 5 and 7 show the screen 18 and the screen 19. It shows that there is almost no distance between.

In the state shown in FIGS. 4 and 6, the front-rear distance between the screen 18 and the screen 19 is large, and the low transmission portion 18a of the screen 18 or the low transmission portion 19a of the screen 19 and the high transmission of the other screen are high. Due to the distance between the two parts, both high transmission parts 18b and 1
Light passes through 9b (arrow in FIG. 6). Therefore, light can be transmitted even when both the screen 18 and the screen 19 are completely lowered.

On the other hand, in the state of FIGS. 5 and 7 in which the operation cord 28 is operated to bring the screen 18 closer to the screen 19 and the distance in the front-rear direction is reduced, the low-transmission portion 18a of the screen 18 is used. Alternatively, the low-transmittance portion 19a of the screen 19 covers the high-transmittance portion of the other screen so that the entire screen is shielded from light.

Thus, the screen 18 and the screen 1
By adjusting the distance to 9, the amount of transmitted light can be adjusted, and dimming can be performed. In this example, when the screen 18 moves from FIG. 4 (FIG. 5) to FIG. 6 (FIG. 7), the screen 18 moves up and down a little, but the fluctuation causes the screen to move up and down to adjust light. There is no problem compared to the case. Also, suppose screen 1
Even when the vertical movement of 8 is large, when the light is shielded, the low transmission portion 18a of the screen 18 or the low transmission portion 19a of the screen 19 covers the high transmission portion of the other screen so that the entire two screens are shielded. The light can be prevented from leaking from the lower side.

Further, the screen 18 and the screen 19 are independently wound around the winding pipe 16 and the winding pipe 17 or the winding pipe 16 and the winding pipe 17 by the same operation as a normal roll screen. It can be raised and lowered by unwinding from. For example, when it is desired to enjoy the design of the screen 19, it can be realized by winding only the screen 18 on the winding pipe 16 as shown in FIG. Alternatively, by winding both screens 18 and 19, the opening provided with the roll screen can be completely opened. In this way, various aspects of the roll screen can be realized.

FIGS. 8 to 10 are side views showing a second embodiment of the present invention with one side plate removed. In this example, the screen 19 is used as a distance adjusting mechanism for changing the distance between the two screens in the front-rear direction.
This is different from the first embodiment in that the elevating mechanism for operating the elevating and lowering of the device also serves as the mechanism. The screen 18 moves up and down as in the first embodiment, and the structure of the winding pipe 16 is the same as in the first embodiment. On the other hand, on one end side of the winding pipe 17 to which the screen 19 is connected, the pulley 3 is connected to the winding pipe 17 and is concentric with the winding pipe.
0 is provided, and the operation code 32 is attached to the pulley 30.
Is wrapped around. In addition, a clutch device (not shown) is provided between the pulley 30 and the take-up pipe 17 to take up the take-up pipe 1.
Built in 7. The clutch device transmits the rotation from the pulley 30 to the winding pipe 17, while the winding pipe 1
The rotation from 7 does not transmit, but acts to prevent the rotation. Therefore, by operating the operation cord 32 to rotate the pulley 30 in either direction, the winding pipe 17 rotates in the same direction, and in the case of the screen unwinding direction rotation depending on the rotation direction. , The screen 19 is unwound and the screen 19 descends (FIG. 9). In the case of rotation in the screen winding direction, the screen 19 is wound and the screen 19 rises (see FIG. 8). Further, when the operation code 32 is not operated, when the take-up pipe 17 tries to rotate due to the external force acting on the take-up pipe 17, the clutch device prevents the take-up pipe 17 from rotating and the screen 19 stops. maintain. The operation code 32 is provided with a stopper 32a. When the operation code 32 is operated and the stopper 32a reaches the pulley 30, the stopper 32a and the pulley 30 interfere with each other to prevent the pulley 30 from further rotating. It has become. The position where the stopper 32a interferes with the pulley 30 is set to a position where the take-up pipe 17 completely unwinds the screen 19 and then the take-up pipe 17 further rotates half a turn.

9 and 11 show a state in which the distance between the screen 18 and the screen 19 is widest, and FIG.
12 and FIG. 12 show a state in which there is almost no distance between the screen 18 and the screen 19, and FIGS. 9 and 11 show a state in which the screen 19 is completely unwound from the winding pipe 17. In this state, the low transmission portion 18a of the screen 18 or the low transmission portion 19a of the screen 19
Since there is a distance between the high transmissive portion of the other screen and the high transmissive portion of the other screen, light passes through both the high transmissive portions 18b and 19b.

Next, when it is desired to shield light, the operation code 32 is operated to further rotate the take-up pipe 17 about half a turn in the screen unwinding direction. Then, the screen 19 approaches the screen 18 while maintaining the state of being unwound from the winding pipe 17, and the low transmission part 18a of the screen 18 or the low transmission part 19a of the screen 19 covers the high transmission part of the other screen. To hide it, the entire two screens can be shaded.

In the second embodiment, the state of FIGS. 9 and 11 in which the distance between the screen 18 and the screen 19 is the largest and the state of FIGS. 10 and 12 in which the distance between the screen 18 and the screen 19 is the smallest. In the state, the heights of the screen 18 and the screen 19 can be made completely the same.
Further, since the operation cord 32, the pulley 30 and the clutch device which constitute the distance adjusting mechanism can also be used as the elevating mechanism, the existing components can be realized without increasing the number of components. Further, although the lifting mechanism of the screen 19 and the distance adjusting mechanism are used together, the lifting mechanism of the screen 18 and the distance adjusting mechanism may be used together, or the lifting mechanism and the distance adjusting mechanism of both screens may be used together. Good.

In each of the above embodiments, the high-transmission part and the low-transmission part of each of the two screens 18 and 19 can be manufactured by an arbitrary method. Can be manufactured into a desired pattern.

In each embodiment, the screens 18, 1
9 is connected to the take-up pipes 16 and 17 so as to be able to be taken up and unwound, respectively, but only one of the screens may be connected to the take-up pipe so that it can be taken up and unwound, and the other screen is used. The screen may not move up and down. Alternatively, both the screens 18 and 19 may be connected to the same winding pipe so that they can be wound and unwound. Then, the two screens 18, by the distance adjusting mechanism,
It is preferable that the distance 19 in the front-back direction can be changed.

The distance between the two screens 18 and 19 in the front-rear direction may be changed by any mechanism other than the above-mentioned distance adjusting mechanism. For example, one of the winding pipes itself is moved in the front-rear direction. It is also possible to change it.

[0027]

As described above, according to the present invention, the light amount can be adjusted by changing the distance between the first screen and the second screen in the front-rear direction. It is not necessary to move the screen up and down, and it is possible to avoid opening the lower side of the screen when blocking light.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a roll screen according to a first embodiment of the present invention.

FIG. 2 is an overall perspective view showing a state in which a screen on the front side of the roll screen according to the first embodiment is raised.

FIG. 3 is a front view of each of the two screens.

FIG. 4 is a side view of the roll screen according to the first embodiment in a state where a distance between two screens in a front-rear direction is large.

FIG. 5 is a side view of the roll screen according to the first embodiment in a state where the distance between the two screens in the front-rear direction is small.

FIG. 6 is a cross-sectional view of the roll screen according to the first embodiment taken along line 6-6 in FIG. 1 in a state where the two screens have a large distance in the front-rear direction.

7 is a cross-sectional view of the roll screen according to the first embodiment taken along line 6-6 in FIG. 1 in a state where the distance between the two screens in the front-rear direction is small.

FIG. 8 is a side view (side brackets are omitted) of the roll screen according to the second embodiment of the present invention, showing a state where one screen is raised.

FIG. 9 is a side view (side brackets are omitted) of the roll screen according to the second embodiment in a state where the distance between the two screens in the front-rear direction is large.

FIG. 10 is a side view (side brackets are omitted) of the roll screen according to the second embodiment in a state where the distance between the two screens in the front-rear direction is small.

FIG. 11 is a cross-sectional view of the roll screen according to the second embodiment in a state where the distance between the two screens in the front-rear direction is large.

FIG. 12 is a cross-sectional view of the roll screen according to the second embodiment in a state where the distance between the two screens in the front-rear direction is small.

[Explanation of symbols] 10 roll screen 16, 17 Winding pipe 18 screens (1st screen) 18a Low transmission part 18b High transmission part 19 screens (2nd screen) 19a Low transmission part 19b High transmission part

Claims (4)

[Claims] 1. A first screen (18) and a second screen (19) arranged in parallel behind the first screen (18), the first screen (18) and the second screen (19). Has portions (18a, 18b, 19a, 19b) each having different light transmittance,
A roll screen characterized in that the distance between the screen (18) and the second screen (19) in the front-rear direction can be changed, and the amount of light can be adjusted by changing the distance. 2. The first screen (18) and the second screen (19) both have a high transmission part (18) having a high light transmittance.
b, 19b) and the low transmittance portion (18a, 1b) having a low light transmittance.
9a) and has a first screen (18) and a second screen (18).
When the predetermined height relationship with the screen (19) is satisfied, the portion corresponding to the high transmission portion (18b) of the first screen (18) is the low transmission portion (19) of the second screen (19).
a) and the portion corresponding to the high transmission part (19b) of the second screen (19) is the first screen (1).
8. The roll screen according to claim 1, wherein the roll screen has a low transmission portion (18a) of 8). 3. The first screen (18) and the second screen (19) both have a high transmission part (18) having a high light transmittance.
b, 19b) and the low transmittance portion (18a, 1b) having a low light transmittance.
9a) and has a first screen (18) and a second screen (18).
When the predetermined height relationship with the screen (19) is satisfied, the low transmission part (18a) of the first screen (18)
The high transmission part (19b) of the second screen (19) is covered, and the low transmission part (19a) of the second screen (19) covers the high transmission part (18b) of the first screen (18). The roll screen according to claim 1. 4. The low transmission part (1) of the first screen (18).
8a), the second screen (19) is a high transmission part (19b) similar to the low transmission part (18a) of the first screen (18), or the second screen (1).
The first screen (18) corresponds to the low transmission part (19a) of the second screen (19) corresponding to the low transmission part (19a) of the second screen (19).
The roll screen according to claim 3, wherein the roll screen has a high transmission portion (18b) similar to b).