JP2000136680A - Shading sheet, its manufacture, roll blind using the shading sheet, vertical blind and venetian blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat insulation in addition to effect for shading sunlight by piecing up a plurality of films to be formed respectively, and sticking a shading film on a base film so that respective joint parts are not matched to be made a shading sheet having transparency. SOLUTION: A shading film 12 for shading an ultraviolet ray and an infrared ray in transparency substantially is stuck on the surface and the reverse of a base film 11 comprising a colorless and transparent polyethylene film to form a shading sheet 1. While, for instance, the three base films are pieced up in the longitudinal direction to stick a transparent polyethylene film 111 on a joint part 110, for instance, the two shading films 12 are pieced up in the longitudinal direction, and a joint part 120 is not matched with the joint part 110 of the base film 11 to be stuck on the surface and the reverse of the base film 11 so as to form the shading sheet 1. An area is wide by a laminated structure, and since the shading sheet 1 of strong tension strength shades not only the ultraviolet ray but also the infrared ray substantially, it is excellent in heat insulation in addition to effect for shading sunlight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light shielding sheet, a method for producing the same, a roll blind using the light shielding sheet,
Regarding vertical blinds and venetian blinds. More specifically, the present invention relates to a roll blind, a vertical blind, and the like that not only reduce sunlight and reduce glare, but also have excellent heat insulating properties and are less likely to cause a feeling of oppression even when used.

[0002]

2. Description of the Related Art Conventionally, roll blinds, venetian blinds, and the like have been widely used in offices and homes for awning and shading. A cloth screen is generally used for the roll blind.

In recent years, window glass laminated with a light-shielding film (hereinafter sometimes referred to as light-shielding glass) has been developed, and is often used for buildings mainly fitted with windows, such as office buildings. Have been. This light-shielding film not only reduces glare by cutting off sunlight, but also has an excellent heat insulating effect.

The above light-shielding films are available in various color types such as colorless and transparent, silver, blue, and brown. Further, those which block ultraviolet rays in a wide area and have antibacterial and antifouling effects. Etc.
Various types have been developed.

[0005]

However, each of the above-mentioned devices has the following problems. That is, since the screen used for the conventional roll blind is generally made of cloth, ultraviolet rays are easily transmitted through fine gaps in the weave of the cloth. Further, conventional roll blinds and venetian blinds have poor heat insulating properties as compared with the case where light-shielding glass is attached, and the effect of reducing the cooling and heating costs is not sufficient. In addition, when a venetian blind or a roll blind is used to prevent the dazzling of the sun, it is easy to feel a sense of oppression because almost no outside landscape can be seen from indoors.

[0006] On the other hand, the light-shielding glass is excellent in that it has various effects such as a solar light-cutting effect and a heat-insulating effect, but has a drawback of cutting visible light by more than 20% at the same time. Moreover, since the windows cannot be opened in the building where the light-shielding glass is fitted and killed, indoor lighting is required even in the daytime, which has contributed to an increase in power consumption.

Further, when a light-shielding film is used for a netted glass, a template glass, or the like, heat is likely to be trapped in the glass itself and the glass is likely to be damaged, so that it cannot be used for such a specific glass. There was.

(Objects of the Invention) Accordingly, an object of the present invention is to provide a light-shielding sheet which not only reduces sunlight and reduces glare but also has excellent heat insulating properties, a method for producing the same, and a roll using the light-shielding sheet. To provide blinds and the like. Another object of the present invention is to provide a light-shielding sheet and a method of manufacturing the light-shielding sheet, in which the user can see the outside scene from inside even when in use, and a method of manufacturing the same, and a roll blind using the light-shielding sheet. . Other objects of the present invention will become apparent from the following description.

[0009]

Means of the present invention taken to achieve the above object are as follows. According to a first aspect of the present invention, there is provided a light-shielding film, which includes a light-shielding film that essentially blocks transmission of ultraviolet light and infrared light, and has transparency as a whole. , A light shielding sheet.

According to a second aspect of the present invention, in a blind used in a blind, a base film and a light-shielding film attached to one or both sides of the base film, which essentially blocks transmission of ultraviolet rays and infrared rays, are provided. A light-shielding sheet, wherein the light-shielding sheet as a whole has transparency.

In the third invention, the base film and the light-shielding film are formed by joining a plurality of films, and the seam portion of the base film and the seam portion of the light-shielding film do not coincide with each other. A light-shielding sheet according to the second invention.

According to a fourth aspect of the present invention, there is provided the light-shielding sheet according to the first, second or third aspect, characterized in that at least one surface is a printing surface.

According to a fifth aspect of the present invention, there is provided a method of forming a base film by joining a plurality of transparent films in a blind, and joining a plurality of films essentially blocking transmission of ultraviolet rays and infrared rays. Forming a light-shielding film together, and attaching a light-shielding film to one or both surfaces of the base film so that the seam portion of the base film and the seam of the light-shielding film do not coincide with each other. This is a sheet manufacturing method.

According to a sixth aspect of the present invention, there is provided a roll blind wherein the light-shielding sheet according to any one of the first to fourth aspects is used as a screen.

According to a seventh aspect of the present invention, there is provided the roll blind according to the sixth aspect, wherein a thin weight bar attaching portion is formed at one end of the screen.

In the eighth invention, the light-shielding sheet according to the second, third or fourth invention is used as a screen, and one end of the screen to which the weight bar is attached is extended to the end. A light-shielding film or a base film extending on the end side.

According to a ninth aspect of the present invention, there is provided a vertical blind, wherein the light shielding sheet according to any one of the first to fourth aspects is a slat.

According to a tenth aspect of the invention, there is provided a venetian blind having a thin portion on one end side of the slat, the thin portion being attached to a hanger rail.

In the eleventh invention, the light-shielding sheet according to the second, third or fourth invention is provided as a slit, and one end of the screen attached to the hanger rail is provided to extend to the end. A vertical blind, comprising a light-shielding film or a base film extended on an end side.

According to a twelfth aspect, the venetian blind, wherein the light-shielding sheet according to any one of the first to fourth aspects is a slat.

(Operation) The light-shielding sheet according to the present invention contains a light-shielding film that essentially blocks transmission of ultraviolet light.
Therefore, if a roll blind using the light-shielding sheet as a screen is used, ultraviolet rays can be cut as compared with a conventional one. Further, the light-shielding film essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore, the roll blind in which the light-shielding sheet is used as a screen is superior in heat insulation as compared with the conventional venetian blind and roll blind. Thereby, if the roll blind according to the present invention is used, the cost of cooling and heating can be reduced.

Since the light-shielding sheet has transparency, if a roll blind using the light-shielding sheet as a screen is used, even when the screen is lowered, the outside scenery can be viewed from indoors and outdoors. Therefore, a feeling of oppression is less likely to be felt as compared with the case where a conventional roll blind or venetian blind is used.

In the light-shielding sheet in which the base film and the light-shielding film are formed by joining a plurality of films, the seam portion of the base film and the seam portion of the light-shielding film do not coincide at the same place, A light-shielding film is attached to one or both sides of the base film. Therefore, according to this laminated structure in which a number of films are connected, a light-shielding film having a large area and a high tensile strength can be formed.

In a roll blind in which a light-shielding sheet having at least one surface as a printing surface is a screen,
For example, by printing a company logo or the like on the printing surface, or by printing a landscape image or the like on the printing surface, it is possible to form an excellent design.

Since the screen of the roll blind can be wound up, the screen can be raised and lowered as required, unlike the case where the light-shielding glass is fitted. With this, if the roll blind is used, plenty of natural light can be taken in if necessary. Therefore, compared with the case where the light shielding glass is used,
It is possible to save the power of daytime lighting.

The conventional light-shielding film causes inconvenience such as glass breakage when directly adhered to specific glass such as netted glass or template glass. However, if the roll blind according to the present invention is used, such inconvenience does not occur. , Can be installed on any window glass. In addition, the roll blind has the same ultraviolet ray preventing effect and heat insulating effect as the light shielding glass.

Further, even when the light-shielding sheet according to the present invention is used as a slat for a vertical blind or a venetian blind, the same effect as described above can be obtained.

In a roll blind in which one end of a screen to which a weight bar is attached is formed thin,
The weight bar mounting portion of the screen can be made flexible. Therefore, even if the weight bar is attached by bending one end of the screen, no wrinkles are formed at the tip of the screen.

In a vertical blind in which one end of a slat attached to a hanger rail is formed thin, one end of the slat can have flexibility, so that wrinkles do not enter even if the portion is bent. Has become.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a light shielding sheet according to the present invention. The light-shielding sheet 1 has a base film 11 and light-shielding films 12, 12 attached to the front and back surfaces of the base film 11. The base film 11 is formed of a colorless and transparent polyethylene film. The light-shielding film 12 is a film that is transparent and essentially blocks ultraviolet and infrared rays.

The base film 11 is not limited to the above-mentioned polyethylene film, but is desirably a film having such a property that it does not easily expand even when heat is applied. That is, if it is a polyethylene film, a film formed of high-density polyethylene is more preferable than low-density polyethylene.

Since an adhesive is previously applied to one surface of the light shielding film 12 (the base film 11 side in FIG. 1), the light shielding film 12 is directly adhered to the base film 11 to form the light shielding sheet 1. Just attach it.

The light-shielding film 12 is colorless,
For example, various color types such as silver, blue, and brown can be appropriately used depending on the application. Further, instead of adhering the light-shielding films 12 having the same effect to the front and back surfaces of the base film 11, light-shielding films 12 having different effects can be adhered respectively.

For example, a light-shielding film for cutting ultraviolet and infrared rays in a wide area is attached to the back surface of the base film 11, and a light-shielding film having an antibacterial / antifouling effect or flameproofing property is attached to the surface. When a film having flameproofing properties is also used, the transparency of the light-shielding sheet 1 may be slightly reduced.

Further, the light-shielding films 12 are not adhered to both sides of the base film 11 as in the present embodiment, but the light-shielding films 12 are adhered to only one surface of the substrate film 11 to form the light-shielding sheet 1. You can also.

Next, a case where a light shielding sheet having a large area is formed will be described. FIG. 2 is an exploded explanatory view of the light shielding sheet viewed from a cross-sectional direction. The thickness and length of the light shielding sheet in FIG. 2 are partially exaggerated so that the laminated structure can be easily understood. The same or equivalent parts as those in FIG. 1 are denoted by the same reference numerals.

The base film 11 has a thickness of 75 μm and a width of 1.
Three 000 mm transparent polyethylene films are spliced in the longitudinal direction, and the seam portions 110 and 11 are further joined.
The transparent polyethylene films 111, 111 each having a thickness of 25 μm and a width of 50 mm are attached to the “0”.

The light-shielding film 12 is formed by joining two films, which essentially block ultraviolet rays and infrared rays, in the longitudinal direction. The light-shielding film 12 has a seam portion 120 that is a seam portion 11 of the base film 11.
They are attached to the front and back surfaces of the base film 11 so as not to coincide with 0. Thereby, the base film 11
And the light-shielding film 12 can be strongly bonded to each other. Therefore, according to this laminated structure in which a number of films are connected, the light-shielding sheet 1 having a large area and a high tensile strength can be formed.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the roll blind according to the present invention, FIG. 4 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, and FIG. It is the principal part enlarged explanatory drawing seen from the front side. FIG.
FIG. 7 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, and shows an embodiment different from that shown in FIG. FIG. 5 shows a screen without a weight bar.

The roll blind 2 includes a roll device 3 and
Screen 1 with weight bar 4 attached to lower end
a (see FIG. 1).

First, the roll device 3 will be described. The roll device 3 includes a frame 31, side brackets 32, 3
2. It mainly comprises a winding pipe 33, around which a screen 1a is wound. The frame 31 is provided with mounting brackets 311 and 311 for mounting the roll blind 2 on a window frame or the like.

A pulley (not visible in the drawing) is provided on the left end of the winding pipe 33 in FIG. 3, and a pulley cover 34 is attached to the pulley. Reference numeral 35 denotes a chain hung on a pulley. By pulling the chain, the take-up pipe 33 rotates to rotate the screen 1.
a rises and falls as needed.

In this embodiment, the chain type roll device 3 is employed, but a one-touch type roll device having a pull cord type or both a pull cord type and a chain type function is employed. Can also.

Next, the screen 1a will be described.
The screen 1a is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. Tip side of screen 1a (may be referred to as weight bar attachment 10 in this specification)
Is thin so that wrinkles do not occur when the weight bar 4 is attached (see FIG. 4). Specifically, the light-shielding films 12 provided on the front and back surfaces of the base film 11 are about 20
mm long. The long light-shielding films 12, 12 are attached to each other from the front and back sides.

Then, a double-sided tape (not shown) and a staple needle 13 are provided on the distal end side of the weight bar attaching portion 10.
Thereby, the locking plate 14 made of synthetic resin is continuously attached in the width direction of the screen 1a (see FIG. 5).

Next, the mounting structure of the weight bar 4 to the screen 1a will be described (see FIG. 4). The weight bar 4 is formed in a hollow shape, and a screen 1a is provided on its top side.
Groove 41 for locking the weight bar mounting portion 10
Are formed continuously in the longitudinal direction. Then, the distal end side of the weight bar attachment portion 10 is slightly bent inward, and the locking plate 14 is locked in the engagement groove 41 of the weight bar 4.

When the weight bar 4 is actually mounted on the screen 1a, one end of the weight bar 4 is brought into contact with one end of the weight bar mounting portion 10 in the width direction, and the weight bar is mounted on the engagement groove 41 while sliding. The part 10 is inserted.

When the weight bar 4 is attached to the screen 1a, the distal end side of the weight bar attachment portion 10 is bent. However, as described above, the weight bar attachment portion 10 is formed thinner than the thickness of the screen 1a main body. It is flexible and does not wrinkle on the tip side of the screen 1a. Furthermore, caps 42, 42 are attached to both ends of the weight bar 4 (see FIG. 1).
The weight bar 4 does not come off the screen 1a.

The weight bar mounting portion 10 of the screen 1a is formed by forming the base film 11 longer than the light shielding films 12 on the front and back surfaces as shown in FIG.
As shown in FIG. 7, only the light-shielding film 12 on one side can be formed to be longer than the base film 11.

Further, in the present embodiment, the screen 1a is used for the roll blind. However, the present invention is not limited to this, and the screen 1a can be used alone as a partition.

Further, if images and characters are printed with one surface of the light-shielding sheet 1 as a printing surface, a screen 1a having excellent design can be obtained. For example, printing a company logo or the like on the printing surface and making it visible from the outside will be a company advertisement, and printing a landscape image or the like on the printing surface will be a part of the interior. Furthermore, since the screen 1a has transparency, when the outside scene is viewed with the screen 1a lowered, it looks as if images and characters are floating inside.

The size of the screen 1a is arbitrarily set according to the place of use and purpose. The thickness of the screen 1a is also arbitrarily set according to the place of use and purpose, but is preferably about 100 μm to 150 μm. That is, if the thickness is less than 100 μm, the films may overlap and wrinkle when the screen 1a is moved up and down. If the thickness is more than 150 μm, the screen may become too stiff and curl.

(Operation) The operation of the present embodiment will be described with reference to FIGS. The screen 1 a of the roll blind 2 has a light shielding film 12. The light-shielding film 12 essentially blocks transmission of ultraviolet light. Therefore,
If the roll blind 2 having the light shielding sheet 12 as the screen 1a is used, ultraviolet rays can be cut as compared with a conventional one. The light-shielding film 12 essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore, the roll blind 2 is also excellent in heat insulation as compared with the conventional venetian blind and roll blind.

Therefore, the roll blind 2 not only cuts the sun's rays to reduce glare but also prevents hot air from the outdoors from flowing into the indoors in summer and radiates heat from indoor heating in the winters. Can be prevented from escaping. Therefore, by using the roll blind 2, it is possible to reduce the cooling and heating costs.

Since the screen 1a has transparency, even when the screen 1a is lowered, the outside scenery can be viewed from indoors. This makes it less likely to feel oppression than when using conventional venetian blinds or roll blinds.

Since the screen 1a can be wound up, the screen 1a can be raised and lowered as required, unlike the case where the light-shielding glass is fitted. As a result, plenty of natural light can be taken in as needed, and it is possible to reduce the amount of electric power for illumination.

In addition, the conventional light-shielding film causes inconvenience such as glass breakage when directly applied to specific glass such as netted glass or template glass. However, if the roll blind 2 is used, there is no such inconvenience. Can be installed on any window glass. Further, the roll blind 2 has the same light-shielding effect and heat-insulating effect as the light-shielding glass.

Furthermore, if the roll blind 2 is used on a ship or the like, the screen 1a can be lowered during the day to prevent irregular reflection from the sea surface, and at night, the screen 1a can be raised to prevent the view from being obstructed. it can.

Further, it is difficult to easily remove the conventional cloth roll blind once it is soiled, but since the screen 1a is formed of a synthetic resin film, it is wiped with a cloth or the like. And can easily remove dirt.

FIG. 8 is an explanatory view showing an embodiment of the vertical blind according to the present invention, FIG. 9 is an enlarged explanatory view of a main part showing a tip side of a slat, and FIG. 10 is an explanatory view showing a cross section taken along line AA of FIG. 11, 11 and 12 are cross-sectional views taken along the line AA of FIG. 9 and show an embodiment different from that shown in FIG.

The vertical blind 5 mainly includes a hanger rail 51 and a plurality of slats 1b (see FIG. 8). The slat 1b is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. 2, and is attached to the hanger rail 51 via the hook 52.

The structure for attaching the slat 1b to the hook 52 will be described (see FIG. 9). Inside the tip side of the slat 1b, a slat hanger 53 having a hook portion 531 at the center of the top and formed in a rod shape is provided. The slat 1b is attached to the hook 52 via the hook 531 that is pulled out from the hole 15 formed in the slat 1b.

Slat hanger 5 for slat 1b
3 will be described (see FIG. 10). The slat hanger 53 is wound by the light shielding film 12. The light-shielding film 12 is affixed to one side of the base film 11 and is provided so as to extend to an end portion side of the base film 11. Therefore, the tip side of the slat 1b around which the slat hanger 53 is wound is formed thinner than the thickness of the slat 1b main body. Thereby, the tip side of the slat 1b is flexible, so that even when the slat 1b is folded, no wrinkles are formed in the portion.

As shown in FIG. 11, the slat hanger 53 may be wound by the light-shielding films 12, 12 on the front and back surfaces provided to extend from the base film 11 to the end side. As shown in FIG. 12, the slat hanger 53 may be wound by the base films 11 longer than the light-shielding films 12 on the front and back surfaces.

A balance weight 54 is attached to the lower end of the slat 1b, and the slats 1b are connected to each other by a bottom cord 55.

(Operation) The operation of the present embodiment will be described with reference to FIG. The description of the same functions as those of the first embodiment will be omitted. For this,
The same applies to the venetian blind shown in FIG. 9 described later. Since the vertical blind 5 has the slats provided in the vertical direction, the sunshine can be adjusted according to the direction of the sun.

FIG. 13 is a perspective view showing an embodiment of the venetian blind according to the present invention. The venetian blind 6 is installed on the window frame 7 and mainly includes a lifting device 61 and a plurality of slats 1c. Slat 1
c is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. 2, and is connected by the lifting cords 62, 62. Reference numeral 63 denotes a bottom rail for stabilizing the slat. Reference numeral 64 denotes a tilt adjusting pipe for changing the tilt angle of the slat 1c. Reference numeral 65 denotes a stopper string 65 for moving the slat 1c up and down and fixing the slat 1c at a required height position.

(Operation) The operation of the present embodiment will be described with reference to FIG. Since the venetian blind 6 has the slats 1c provided in the horizontal direction, the sunshine can be adjusted according to the altitude of the sun.

It should be noted that the terms and expressions used in the present specification are for explanation only, are not restrictive, and do not exclude terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications are possible within the scope of the technical idea.

[0069]

The present invention has the above configuration and has the following effects. (A) The light-shielding sheet according to the present invention includes a light-shielding film that essentially blocks transmission of ultraviolet light. Therefore, if a roll blind using the light-shielding sheet as a screen is used, ultraviolet rays can be cut as compared with a conventional one. Further, the light-shielding film essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore,
The roll blind using the light-shielding sheet as a screen is also superior in heat insulation as compared with conventional venetian blinds and roll blinds.

(B) Since the light-shielding sheet has transparency, if a roll blind using the light-shielding sheet as a screen is used, even when the screen is lowered, the outside scenery can be viewed from indoors. Therefore, a feeling of oppression is less likely to be felt as compared with the case where a conventional roll blind or venetian blind is used.

(C) In a light-shielding sheet in which the base film and the light-shielding film are formed by joining a plurality of films, the seam portion of the base film and the seam of the light-shielding film do not coincide at the same place. A light-shielding film is attached to one or both sides of the base film. Therefore, according to this laminated structure in which a number of films are connected, a light-shielding film having a large area and a high tensile strength can be formed.

(D) In the case of a roll blind in which a light-shielding sheet having at least one surface as a printing surface is used as a screen, for example, a company logo mark or the like is printed on the printing surface, or a landscape image or the like is printed on the printing surface. By printing or the like, a product excellent in design can be formed.

(E) Since the screen of the roll blind can be wound up, the screen can be raised and lowered as necessary, unlike the case where the light shielding glass is fitted. With this, if the roll blind is used, plenty of natural light can be taken in if necessary. Therefore, it is possible to reduce the amount of power for daytime illumination as compared with the case where the light shielding glass is used.

(F) When the conventional light-shielding film is directly adhered to a specific glass such as a netted glass or a template glass, disadvantages such as glass breakage have occurred. However, if the roll blind according to the present invention is used, such a problem is caused. It can be installed on any window glass without any inconvenience. Moreover, the roll blind has the same ultraviolet ray preventing effect and heat insulating effect as the light shielding glass. It should be noted that even when the light-shielding sheet according to the present invention is used as a slat for a vertical blind or a venetian blind, the same effects as those of the above-described (a) to (f) can be obtained.

(G) In a roll blind in which one end of the screen to which the weight bar is attached is formed thin, the weight bar attachment portion of the screen can have flexibility. Therefore, even if the weight bar is attached by bending one end of the screen, no wrinkles are formed at the tip of the screen.

(F) In a vertical blind in which one end of a slat attached to a hanger rail is formed to be thin, the slat can have flexibility at one end, so that wrinkles are formed even when the portion is bent. Not to be.

[0077]

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a light shielding sheet according to the present invention.

FIG. 2 is an exploded explanatory view of the light shielding sheet viewed from a cross-sectional direction.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the roll blind according to the present invention.

FIG. 4 is an enlarged explanatory view of a main part showing a cross section on the tip side of the screen.

FIG. 5 is an enlarged explanatory view of a main part when the front end side of the screen is viewed from the front side.

FIG. 6 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, showing an embodiment different from that shown in FIG. 4;

FIG. 7 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, showing an embodiment different from that shown in FIG. 4;

FIG. 8 is an explanatory view showing an embodiment of a vertical blind according to the present invention.

FIG. 9 is an enlarged explanatory view of a main part showing a distal end side of a slat.

FIG. 10 is an explanatory diagram showing an AA cross section of FIG. 9;

FIG. 11 is an explanatory view showing a cross section taken along the line AA of FIG. 9, showing an embodiment different from that shown in FIG. 10;

FIG. 12 is an explanatory view showing a cross section taken along line AA of FIG. 9 and showing an embodiment different from that shown in FIG. 10;

FIG. 13 is a perspective view showing an embodiment of a venetian blind according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light-shielding sheet 11 Base film 110 Seam part 111,111 Polyethylene film 12 Light-shielding film 120 Seam part 1a Screen 1b Slat 1c Slat 10 Weight bar attachment part 13 Needle 14 Lock plate 2 Roll blind 3 Roll device 31 Frame 311, 311 Mounting bracket 32 side bracket 33 pipe 34 pulley cover 35 code 4 weight bar 41 engagement groove 42 cap 43 locking plate 5 vertical blind 51 hanger rail 52 hook 53 slat hanger 15 hole 531 hook portion 54 balance weight 55 bottom cord 6 venetian blind 61 Lifting device 62 Lifting cord 63 Bottom rail 64 Inclination adjustment pipe 65 Stopper string 7 Window frame 130

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[Procedure amendment]

[Submission date] November 5, 1998 (1998.11.
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Light-shielding sheet, method for producing the same, and roll blind, vertical blind, venetian blind using the light-shielding sheet

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light shielding sheet, a method for producing the same, a roll blind using the light shielding sheet,
Regarding vertical blinds and venetian blinds. More specifically, the present invention relates to a roll blind, a vertical blind, and the like that not only reduce sunlight and reduce glare, but also have excellent heat insulating properties and are less likely to cause a feeling of oppression even when used.

[0002]

2. Description of the Related Art Conventionally, roll blinds, venetian blinds, and the like have been widely used in offices and homes for awning and shading. A cloth screen is generally used for the roll blind.

Recently, a window glass laminated with a light-shielding film (herein, sometimes referred to as a light-shielding glass) has been developed, and is often used for buildings mainly fitted with windows, such as office buildings. Have been. This light-shielding film not only reduces glare by cutting off sunlight, but also has an excellent heat insulating effect.

The above light-shielding films are available in various color types such as colorless and transparent, silver, blue, and brown. Further, those which block ultraviolet rays in a wide area and have antibacterial and antifouling effects. Etc.
Various types have been developed.

[0005]

However, each of the above-mentioned devices has the following problems. That is, since the screen used for the conventional roll blind is generally made of cloth, ultraviolet rays are easily transmitted through fine gaps in the weave of the cloth. Further, conventional roll blinds and venetian blinds have poor heat insulating properties as compared with the case where light-shielding glass is attached, and the effect of reducing the cooling and heating costs is not sufficient. Also, to prevent sun glare
When using a roll blind or venetian blind, it was easy to feel a sense of oppression because almost no outside scenery could be seen from indoors.

[0006] On the other hand, the light-shielding glass is excellent in that it has various effects such as a solar light-cutting effect and a heat-insulating effect, but has a drawback of cutting visible light by more than 20% at the same time. Moreover, since the windows cannot be opened in the building where the light-shielding glass is fitted and killed, indoor lighting is required even in the daytime, which has contributed to an increase in power consumption.

Further, when a light-shielding film is used for a netted glass, a template glass, or the like, heat is likely to be trapped in the glass itself and the glass is likely to be damaged, so that it cannot be used for such a specific glass. There was.

(Objects of the Invention) Accordingly, an object of the present invention is to provide a light-shielding sheet which not only reduces sunlight and reduces glare but also has excellent heat insulating properties, a method for producing the same, and a roll using the light-shielding sheet. To provide blinds and the like. Another object of the present invention is to provide a light-shielding sheet and a method of manufacturing the light-shielding sheet, in which the user can see the outside scene from inside even when in use, and a method of manufacturing the same, and a roll blind using the light-shielding sheet. . Other objects of the present invention will become apparent from the following description.

[0009]

Means of the present invention taken to achieve the above object are as follows. According to a first aspect of the present invention, there is provided a light-shielding film, which includes a light-shielding film that essentially blocks transmission of ultraviolet light and infrared light, and has transparency as a whole. , A light shielding sheet.

According to a second aspect of the present invention, in a blind used in a blind, a base film and a light-shielding film attached to one or both sides of the base film, which essentially blocks transmission of ultraviolet rays and infrared rays, are provided. A light-shielding sheet, wherein the light-shielding sheet as a whole has transparency.

In the third invention, the base film and the light-shielding film are formed by joining a plurality of films, and the seam portion of the base film and the seam portion of the light-shielding film do not coincide with each other. A light-shielding sheet according to the second invention.

According to a fourth aspect of the present invention, there is provided the light-shielding sheet according to the first, second or third aspect, characterized in that at least one surface is a printing surface.

According to a fifth aspect of the present invention, there is provided a method of forming a base film by joining a plurality of transparent films in a blind, and joining a plurality of films essentially blocking transmission of ultraviolet rays and infrared rays. Forming a light-shielding film together, and attaching a light-shielding film to one or both sides of the base film so that the seam portion of the base film does not match the seam of the light-shielding film. This is a sheet manufacturing method.

According to a sixth aspect of the present invention, there is provided a roll blind wherein the light-shielding sheet according to any one of the first to fourth aspects is used as a screen.

According to a seventh aspect of the present invention, there is provided the roll blind according to the sixth aspect, wherein a thin weight bar attaching portion is formed at one end of the screen.

In the eighth invention, the light-shielding sheet according to the second, third or fourth invention is used as a screen, and one end of the screen to which the weight bar is attached is extended to the end. A light-shielding film or a base film extending on the end side.

According to a ninth aspect of the present invention, there is provided a vertical blind, wherein the light shielding sheet according to any one of the first to fourth aspects is a slat.

[0018] In the tenth invention, it has a thin portion at one end of the slat, characterized in that said thin portion is attached to the hanger rail, bus according to the ninth invention
It is a blind .

[0019] In the eleventh invention is a light-shielding sheet according to the second and third or fourth invention and slats, one end of the slat to be attached to the hanger rail, provided to extend on the end side A vertical blind, comprising a light-shielding film or a base film extended on an end side.

According to a twelfth aspect, the venetian blind, wherein the light-shielding sheet according to any one of the first to fourth aspects is a slat.

(Operation) The light-shielding sheet according to the present invention contains a light-shielding film that essentially blocks transmission of ultraviolet light.
Therefore, if a roll blind using the light-shielding sheet as a screen is used, ultraviolet rays can be cut as compared with a conventional one. Further, the light-shielding film essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore, a roll blind using the light-shielding sheet as a screen is a conventional roll blind or Venetian.
Compared to blinds , it is also superior in heat insulation. Thereby, if the roll blind according to the present invention is used, the cost of cooling and heating can be reduced.

Since the light-shielding sheet has transparency, if a roll blind using the light-shielding sheet as a screen is used, even when the screen is lowered, the outside scenery can be viewed from indoors and outdoors. Therefore, a feeling of oppression is less likely to be felt as compared with the case where a conventional roll blind or venetian blind is used.

In the light-shielding sheet in which the base film and the light-shielding film are formed by joining a plurality of films, the seam portion of the base film and the seam portion of the light-shielding film do not coincide at the same place, A light-shielding film is attached to one or both sides of the base film. Therefore, according to this laminated structure in which a number of films are connected, a light-shielding sheet having a large area and a high tensile strength can be formed.

In a roll blind in which a light-shielding sheet having at least one surface as a printing surface is a screen,
For example, by printing a company logo or the like on the printing surface, or by printing a landscape image or the like on the printing surface, it is possible to form an excellent design.

Since the screen of the roll blind can be wound up, the screen can be raised and lowered as required, unlike the case where the light-shielding glass is fitted. With this, if the roll blind is used, plenty of natural light can be taken in if necessary. Therefore, compared with the case where the light shielding glass is used,
It is possible to save the power of daytime lighting.

The conventional light-shielding film causes inconvenience such as glass breakage when directly adhered to specific glass such as netted glass or template glass. However, if the roll blind according to the present invention is used, such inconvenience does not occur. , Can be installed on any window glass. In addition, the roll blind has the same ultraviolet ray preventing effect and heat insulating effect as the light shielding glass.

Further, even when the light-shielding sheet according to the present invention is used as a slat for a vertical blind or a venetian blind, the same effect as described above can be obtained.

At one end of the screen is a thin weight bar.
In the case of a roll blind having an attachment portion, the weight bar attachment portion of the screen can have flexibility. Therefore, even if the weight bar is attached by bending one end of the screen, no wrinkles are formed at the tip of the screen.

The slat has a thin portion on one end side.
In the vertical blind attached to the hanger rail, the flesh portion can have flexibility at one end of the slat, so that wrinkles do not occur even when the portion is bent.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a light shielding sheet according to the present invention. The light-shielding sheet 1 has a base film 11 and light-shielding films 12, 12 attached to the front and back surfaces of the base film 11. The base film 11 is formed of a colorless and transparent polyethylene film. The light-shielding film 12 is a film that is transparent and essentially blocks ultraviolet and infrared rays.

The base film 11 is not limited to the above-mentioned polyethylene film, but is desirably a film having such a property that it does not easily expand even when heat is applied. That is, if it is a polyethylene film, a film formed of high-density polyethylene is more preferable than low-density polyethylene.

Since an adhesive is previously applied to one surface of the light-shielding film 12 (the side of the base film 11 in FIG. 1), the light-shielding film 12 is directly attached to the base film 11 to form the light-shielding sheet 1. Just attach it.

The light-shielding film 12 is colorless,
For example, various color types such as silver, blue, and brown can be appropriately used depending on the application. Further, instead of adhering the light-shielding films 12 having the same effect to the front and back surfaces of the base film 11, light-shielding films 12 having different effects can be adhered respectively.

For example, a light-shielding film for cutting ultraviolet and infrared rays in a wide area is attached to the back surface of the base film 11, and a light-shielding film having an antibacterial / antifouling effect or a flameproofing property is attached to the surface. When a film having flameproofing properties is also used, the transparency of the light-shielding sheet 1 may be slightly reduced.

[0035] Furthermore, instead of attaching a light shielding fill arm 12 on both sides of the base film 11 as in the present embodiment, forming the light-shielding sheet 1 by attaching a light shielding film 12 only on one surface of the base film 11 You can also.

[0036] Next, a description will be given of the case of forming a light-shielding sheet having a large area. FIG. 2 is an exploded explanatory view of the light shielding sheet viewed from a cross-sectional direction. The thickness and length of the light shielding sheet in FIG. 2 are partially exaggerated so that the laminated structure can be easily understood. The same or equivalent parts as those in FIG. 1 are denoted by the same reference numerals.

The base film 11 has a thickness of 75 μm and a width of 1.
Three 000 mm transparent polyethylene films are spliced in the longitudinal direction, and the seam portions 110 and 11 are further joined.
The transparent polyethylene films 111, 111 each having a thickness of 25 μm and a width of 50 mm are attached to the “0”.

The light-shielding film 12 is formed by splicing two films that essentially shield ultraviolet rays and infrared rays in the longitudinal direction. The light-shielding film 12 has a joint portion 120 that is a joint portion 110 of the base film 11.
Are attached to the front and back surfaces of the base film 11 so as not to coincide with the above. Thereby, the base film 11 and the light-shielding film 12 can be strongly bonded to each other. Therefore, according to this laminated structure in which a number of films are connected, the light-shielding sheet 1 having a large area and a high tensile strength can be formed.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the roll blind according to the present invention, FIG. 4 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, and FIG. It is the principal part enlarged explanatory drawing seen from the front side. FIG.
FIG. 7 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, and shows an embodiment different from that shown in FIG. FIG. 5 shows a screen without a weight bar.

The roll blind 2 includes a roll device 3 and
Screen 1 with weight bar 4 attached to lower end
a (see FIG. 3 ).

First, the roll device 3 will be described. The roll device 3 includes a frame 31, side brackets 32, 3
2. It mainly comprises a winding pipe 33, around which a screen 1a is wound. The frame 31 is provided with mounting brackets 311 and 311 for mounting the roll blind 2 on a window frame or the like.

A pulley (not visible in the drawing) is provided on the left end side of the winding pipe 33 in FIG. 3, and a pulley cover 34 is attached to the pulley. Reference numeral 35 denotes a chain hung on a pulley. By pulling the chain, the take-up pipe 33 rotates to rotate the screen 1.
a rises and falls as needed.

In this embodiment, the chain type roll device 3 is employed, but a one-touch type roll device having a pull cord type or both a pull cord type and a chain type function is employed. Can also.

Next, the screen 1a will be described.
The screen 1a is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. Tip side of screen 1a (may be referred to as weight bar attachment 10 in this specification)
Is thin so that wrinkles do not occur when the weight bar 4 is attached (see FIG. 4). Specifically, the light-shielding films 12 provided on the front and back surfaces of the base film 11 are about 20
mm long. Then, the light shielding film 12, 12 of the part is provided long Ru <br/> Oh adhered to each other from the front and back surfaces.

Then, a double-sided tape (not shown) and a staple needle 13 are provided on the distal end side of the weight bar attaching portion 10.
Thereby, the locking plate 14 made of synthetic resin is continuously attached in the width direction of the screen 1a (see FIG. 5).

Next, the structure for attaching the weight bar 4 to the screen 1a will be described (see FIG. 4). The weight bar 4 is formed in a hollow shape, and a screen 1a is provided on its top side.
Groove 41 for locking the weight bar mounting portion 10
Are formed continuously in the longitudinal direction. Then, the distal end side of the weight bar attachment portion 10 is slightly bent inward, and the locking plate 14 is locked in the engagement groove 41 of the weight bar 4.

When the weight bar 4 is actually attached to the screen 1a, one end of the weight bar 4 is brought into contact with one end in the width direction of the weight bar attaching portion 10, and the weight bar is attached to the engaging groove 41 while sliding. The part 10 is inserted.

When the weight bar 4 is mounted on the screen 1a, the distal end side of the weight bar mounting portion 10 is bent. However, as described above, the weight bar mounting portion 10 is formed thinner than the thickness of the screen 1a main body. It is flexible and does not wrinkle on the tip side of the screen 1a. Further, caps 42, 42 are attached to both ends of the weight bar 4 (see FIG. 3 ).
The weight bar 4 does not come off the screen 1a.

The weight bar mounting portion 10 of the screen 1a may be formed by making the base film 11 longer than the light shielding films 12, 12 on the front and back surfaces as shown in FIG.
As shown in FIG. 7, only the light-shielding film 12 on one side can be formed to be longer than the base film 11.

Further, in the present embodiment, the screen 1a is used for the roll blind. However, the present invention is not limited to this, and the screen 1a can be used alone as a partition.

Further, by printing an image or a character using one surface of the light shielding sheet 1 as a printing surface, a screen 1a having excellent design can be obtained. For example, printing a company logo or the like on the printing surface and making it visible from the outside will be a company advertisement, and printing a landscape image or the like on the printing surface will be a part of the interior. Furthermore, since the screen 1a has transparency, when the outside scene is viewed with the screen 1a lowered, it looks as if images and characters are floating inside.

The size of the screen 1a is arbitrarily set according to the place of use and purpose. The thickness of the screen 1a is also arbitrarily set according to the place of use and purpose, but is preferably about 100 μm to 150 μm. That is, if the thickness is less than 100 μm, the films may overlap and wrinkle when the screen 1a is moved up and down. If the thickness is more than 150 μm, the screen may become too stiff and curl.

(Operation) The operation of the present embodiment will be described with reference to FIGS. The screen 1 a of the roll blind 2 has a light shielding film 12. The light-shielding film 12 essentially blocks transmission of ultraviolet light. Therefore,
If the roll blind 2 having the light shielding sheet 12 as the screen 1a is used, ultraviolet rays can be cut as compared with a conventional one. The light-shielding film 12 essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore, the roll blind 2 is also excellent in heat insulation as compared with the conventional venetian blind and roll blind.

Accordingly, the roll blind 2 not only cuts the sun's rays to reduce glare, but also prevents hot air from the outdoors from flowing into the indoors in summer, and reduces the radiant heat of indoor heating in the winters. Can be prevented from escaping. Therefore, by using the roll blind 2, it is possible to reduce the cooling and heating costs.

Since the screen 1a has transparency, even when the screen 1a is lowered, it is possible to view the outside scenery from indoors. This makes it less likely to feel oppression than when using conventional venetian blinds or roll blinds.

Since the screen 1a can be wound up, the screen 1a can be raised and lowered as required, unlike the case where the light-shielding glass is fitted. As a result, plenty of natural light can be taken in as needed, and it is possible to reduce the amount of electric power for illumination.

In addition, the conventional light-shielding film causes inconvenience such as glass breakage when directly adhered to specific glass such as netted glass or template glass. However, if the roll blind 2 is used, there is no such inconvenience. Can be installed on any window glass. Further, the roll blind 2 has the same light-shielding effect and heat-insulating effect as the light-shielding glass.

Further, if the roll blind 2 is used for a ship or the like, the screen 1a can be lowered during the day to prevent irregular reflection from the sea surface, and at night, the screen 1a can be raised to prevent the view from being obstructed. it can.

Furthermore, it is difficult to easily remove the conventional roll blind made of cloth once it has been soiled, but since the screen 1a is formed of a synthetic resin film, it is wiped with a cloth or the like. And can easily remove dirt.

FIG. 8 is an explanatory view showing an embodiment of a vertical blind according to the present invention, FIG. 9 is an enlarged explanatory view showing a main part showing a tip side of a slat, and FIG. 10 is an explanatory view showing an AA section of FIG. 11, 11 and 12 are cross-sectional views taken along the line AA of FIG. 9 and show an embodiment different from that shown in FIG.

The vertical blind 5 mainly includes a hanger rail 51 and a plurality of slats 1b (see FIG. 8). The slat 1b is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. 2, and is attached to the hanger rail 51 via the hook 52.

The structure for attaching the slat 1b to the hook 52 will be described (see FIG. 9). Inside the tip side of the slat 1b, a slat hanger 53 having a hook portion 531 at the center of the top and formed in a rod shape is provided. The slat 1b is attached to the hook 52 via the hook 531 that is pulled out from the hole 15 formed in the slat 1b.

Slat hanger 5 for slat 1b
3 will be described (see FIG. 10). The slat hanger 53 is wound by the light shielding film 12. The light-shielding film 12 is affixed to one side of the base film 11 and is provided so as to extend to an end portion side of the base film 11. Therefore, the tip side of the slat 1b around which the slat hanger 53 is wound is formed thinner than the thickness of the slat 1b main body. Thereby, the tip side of the slat 1b is flexible, so that even when the slat 1b is folded, no wrinkles are formed in the portion.

As shown in FIG. 11, the slat hanger 53 may be wound by the light-shielding films 12, 12 on the front and back surfaces provided to extend to the end side from the base film 11. As shown in FIG. 12, the slat hanger 53 may be wound by the base films 11 longer than the light-shielding films 12 on the front and back surfaces.

A balance weight 54 is attached to the lower end of the slat 1b, and the slats 1b are connected to each other by a bottom cord 55 (see FIG. 8) .

(Operation) The operation of the present embodiment will be described with reference to FIG. The description of the same functions as those of the first embodiment will be omitted. For this,
The same applies to the venetian blind shown in FIG. 13 described later. Since the vertical blind 5 has the slats provided in the vertical direction, the sunshine can be adjusted according to the direction of the sun.

FIG. 13 is a perspective view showing an embodiment of a venetian blind according to the present invention. The venetian blind 6 is installed on the window frame 7 and mainly includes a lifting device 61 and a plurality of slats 1c. Slat 1
c is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. 2, and is connected by the lifting cords 62, 62. Reference numeral 63 denotes a bottom rail for stabilizing the slat 1c . Reference numeral 64 denotes a tilt adjusting pipe for changing the tilt angle of the slat 1c. Reference numeral 65 is a slat 1
A stopper string 65 for raising and lowering c and fixing it at a required height position.

(Operation) The operation of the present embodiment will be described with reference to FIG. Since the venetian blind 6 has the slats 1c provided in the horizontal direction, the sunshine can be adjusted according to the altitude of the sun.

It should be noted that the terms and expressions used in the present specification are merely illustrative, not restrictive, and do not exclude terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications are possible within the scope of the technical idea.

[0070]

The present invention has the above configuration and has the following effects. (A) The light-shielding sheet according to the present invention includes a light-shielding film that essentially blocks transmission of ultraviolet light. Therefore, if a roll blind using the light-shielding sheet as a screen is used, ultraviolet rays can be cut as compared with a conventional one. Further, the light-shielding film essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore,
The roll blind using the light-shielding sheet as a screen is superior in heat insulation as compared with the conventional roll blind and venetian blind .

(B) Since the light-shielding sheet has transparency, if a roll blind using the light-shielding sheet as a screen is used, even when the screen is lowered, the outside scenery can be viewed from indoors. Therefore, a feeling of oppression is less likely to be felt as compared with the case where a conventional roll blind or venetian blind is used.

(C) In the case of a light-shielding sheet in which the base film and the light-shielding film are formed by joining a plurality of films, the seam portion of the base film and the seam of the light-shielding film do not coincide at the same place. A light-shielding film is attached to one or both sides of the base film. Therefore, according to this laminated structure in which a number of films are connected, a light-shielding sheet having a large area and a high tensile strength can be formed.

(D) In the case of a roll blind in which a light-shielding sheet having at least one surface as a printing surface is used as a screen, for example, a company logo mark or the like is printed on the printing surface, or a landscape image or the like is printed on the printing surface. By printing or the like, a product excellent in design can be formed.

(E) Since the screen of the roll blind can be wound up, the screen can be raised and lowered as necessary, unlike the case where the light shielding glass is fitted. With this, if the roll blind is used, plenty of natural light can be taken in if necessary. Therefore, it is possible to reduce the amount of power for daytime illumination as compared with the case where the light shielding glass is used.

(F) When the conventional light-shielding film is directly adhered to specific glass such as netted glass or template glass, inconveniences such as glass breakage have occurred. However, such a problem can be solved by using the roll blind according to the present invention. It can be installed on any window glass without any inconvenience. Moreover, the roll blind has the same ultraviolet ray preventing effect and heat insulating effect as the light shielding glass. It should be noted that even when the light-shielding sheet according to the present invention is used as a slat for a vertical blind or a venetian blind, the same effects as those of the above-described (a) to (f) can be obtained.

(G) One end of the screen has a thin wall
In a roll blind having a weight bar attachment portion, the weight bar attachment portion of the screen can have flexibility. Therefore, even if the weight bar is attached by bending one end of the screen, no wrinkles are formed at the tip of the screen.

(F) A thin portion is provided at one end of the slat.
However, in the vertical blind attached to the hanger rail, the thin portion can have flexibility at one end of the slat, so that wrinkles are formed even when the portion is bent. Not to be.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a light shielding sheet according to the present invention.

FIG. 2 is an exploded explanatory view of the light shielding sheet viewed from a cross-sectional direction.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the roll blind according to the present invention.

FIG. 4 is an enlarged explanatory view of a main part showing a cross section on the tip side of the screen.

FIG. 5 is an enlarged explanatory view of a main part when the front end side of the screen is viewed from the front side.

FIG. 6 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, showing an embodiment different from that shown in FIG. 4;

FIG. 7 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, showing an embodiment different from that shown in FIG. 4;

FIG. 8 is an explanatory view showing an embodiment of a vertical blind according to the present invention.

FIG. 9 is an enlarged explanatory view of a main part showing a distal end side of a slat.

FIG. 10 is an explanatory diagram showing an AA cross section of FIG. 9;

FIG. 11 is an explanatory view showing a cross section taken along the line AA of FIG. 9, showing an embodiment different from that shown in FIG. 10;

FIG. 12 is an explanatory view showing a cross section taken along line AA of FIG. 9 and showing an embodiment different from that shown in FIG. 10;

FIG. 13 is a perspective view showing an embodiment of a venetian blind according to the present invention.

[EXPLANATION OF SYMBOLS] 1 light shielding sheet 11 base film 110 joint portion 11 1 po triethylene film 12 shielding film 120 seam portion 1a screen 1b slats 1c slats 10 weight bar mounting part 13 needle 14 engaging plate 2 blind 3 roll apparatus 31 frame 31 1 bracket 32 side bracket 33 winding pipe 34 pulley cover 35 chain 4 weight bar 41 engaging groove 42 a cap 5 vertical blinds 51 clothes rail 52 hook 53 slats hanger 15 holes 531 hook portion 54 balance weight 55 bottom chord 6 Bene INSTALLATION Shan blinds 61 Lifting device 62 Lifting cord 63 Bottom rail 64 Pipe for tilt adjustment 65 Stopper cord 7 Window frame

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8 ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 28, 1999 (1999.12.
28)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Light-shielding sheet, method for producing the same, and roll blind, vertical blind, venetian blind using the light-shielding sheet

[Claims]

In those used in 1. A blind, and the base film, essentially blocks the transmission of ultraviolet and infrared, and a light shielding film which is attached on one side or both sides of the base film,
Wherein the base film and the light-shielding film are a plurality of films.
And the seam portion of the base film and the seam of the light-shielding film are formed.
A light-shielding sheet, characterized in that the portions do not match, and that the entire light-shielding sheet has transparency.

Wherein characterized in that at least one side to the printing surface, the light shielding sheet according to claim 1, wherein.

3. A method for a blind, comprising: joining a plurality of transparent films to form a base film; joining a plurality of films that essentially block transmission of ultraviolet light and infrared light to form a light-shielding film. A method for manufacturing a light-shielding sheet, comprising: attaching a light-shielding film to one or both sides of a base film such that a seam portion of the base film does not match a seam portion of the light-shielding film.

4., characterized in that the screen light shielding sheet according to claim 1 or 2, wherein the roller blind.

5. The roll blind according to claim 4 , wherein a thin weight bar mounting portion is formed at one end of the screen.

6. The light-shielding sheet according to claim 1 or 2 , wherein the screen has a weight bar attached thereto.
A roll blind, comprising: a light-shielding film provided to extend to an end portion; or a base film provided to extend to an end portion.

7., characterized in that a light shielding sheet according to claim 1 or 2 wherein the slats, vertical blinds.

8. The vertical blind according to claim 7 , wherein a thin portion is provided at one end of the slat, and the thin portion is attached to a hanger rail.

9. has a light shielding sheet according to claim 1 or 2 wherein the slats, one end of the slat to be attached to the hanger rail,
A vertical blind, comprising: a light-shielding film provided to extend to an end portion; or a base film provided to extend to an end portion.

10., characterized in that a light shielding sheet according to claim 1 or 2, wherein the slat, venetian blinds.

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light shielding sheet, a method for producing the same, a roll blind using the light shielding sheet,
Regarding vertical blinds and venetian blinds. More specifically, the present invention relates to a roll blind, a vertical blind, and the like that not only reduce sunlight and reduce glare, but also have excellent heat insulating properties and are less likely to cause a feeling of oppression even when used.

[0002]

2. Description of the Related Art Conventionally, roll blinds, venetian blinds, and the like have been widely used in offices and homes for awning and shading. A cloth screen is generally used for the roll blind.

In recent years, window glass laminated with a light-shielding film (hereinafter sometimes referred to as light-shielding glass) has been developed, and is often used for buildings mainly fitted with windows, such as office buildings. Have been. This light-shielding film not only reduces glare by cutting off sunlight, but also has an excellent heat insulating effect.

The above light-shielding films are available in various color types such as colorless and transparent, silver, blue, and brown. Further, those which block ultraviolet rays in a wide area and have antibacterial and antifouling effects. Etc.
Various types have been developed.

[0005]

However, each of the above-mentioned devices has the following problems. That is, since the screen used for the conventional roll blind is generally made of cloth, ultraviolet rays are easily transmitted through fine gaps in the weave of the cloth. Further, conventional roll blinds and venetian blinds have poor heat insulating properties as compared with the case where light-shielding glass is attached, and the effect of reducing the cooling and heating costs is not sufficient. Further, when a roll blind or a venetian blind was used to prevent glare from the sun, it was easy to feel a sense of oppression because almost no outside scenery could be seen from inside to outside.

[0006] On the other hand, the light-shielding glass is excellent in that it has various effects such as a solar light-cutting effect and a heat-insulating effect, but has a drawback of cutting visible light by more than 20% at the same time. Moreover, since the windows cannot be opened in the building where the light-shielding glass is fitted and killed, indoor lighting is required even in the daytime, which has contributed to an increase in power consumption.

Further, when a light-shielding film is used for a netted glass, a template glass, or the like, heat is likely to be trapped in the glass itself and the glass is likely to be damaged, so that it cannot be used for such a specific glass. There was.

(Objects of the Invention) Accordingly, an object of the present invention is to provide a light-shielding sheet which not only reduces sunlight and reduces glare but also has excellent heat insulating properties, a method for producing the same, and a roll using the light-shielding sheet. To provide blinds and the like. Another object of the present invention is to provide a light-shielding sheet and a method of manufacturing the light-shielding sheet, in which the user can see the outside scene from inside even when in use, and a method of manufacturing the same, and a roll blind using the light-shielding sheet. . Other objects of the present invention will become apparent from the following description.

[0009]

Means of the present invention taken to achieve the above object are as follows. In the first invention, in the one used for the blind, the base film and the transmission of ultraviolet and infrared rays are essentially blocked,
And a light-shielding film attached to one or both sides of the base film.
The film is formed by splicing multiple films
Between the base film and the light-shielding film.
The light-shielding sheet is configured so that seams do not coincide with each other, and has transparency as a whole.

According to a second aspect of the present invention, there is provided the light-shielding sheet according to the first aspect, wherein at least one surface is a printing surface.

According to a third aspect of the present invention, there is provided a method of forming a base film by joining a plurality of transparent films in a blind, and joining a plurality of films essentially blocking transmission of ultraviolet rays and infrared rays. Forming a light-shielding film together, and attaching a light-shielding film to one or both surfaces of the base film so that the seam portion of the base film and the seam of the light-shielding film do not coincide with each other. This is a sheet manufacturing method.

According to a fourth aspect of the present invention, there is provided the first or second aspect.
A roll blind, characterized in that the light-shielding sheet described above is used as a screen.

According to a fifth aspect of the present invention, there is provided the roll blind according to the fourth aspect, wherein a thin weight bar mounting portion is formed at one end of the screen.

According to a sixth aspect of the present invention, there is provided the first or second aspect.
The light-shielding sheet described in the above is a screen, and one end of the screen to which the weight bar is attached is formed of a light-shielding film provided to extend to the end, or a base film provided to extend to the end. Roll blind, characterized in that:

According to a seventh aspect of the present invention, there is provided a vertical blind, wherein the light-shielding sheet according to the first or second aspect is a slat.

According to an eighth aspect of the present invention, there is provided the vertical blind according to the seventh aspect, wherein the slat has a thin portion on one end side, and the thin portion is attached to a hanger rail. is there.

According to a ninth aspect of the present invention, the light-shielding sheet according to the first or second aspect of the present invention is a slat, and one end of the slat attached to the hanger rail is provided with a light-shield extending from the end. A vertical blind, comprising a film or a base film extended to an end side.

According to the tenth aspect , the first or the second
A venetian blind, characterized in that the light-shielding sheet according to the invention is a slat.

In the eleventh invention, the base film
And essentially blocks transmission of ultraviolet and infrared light,
Light-shielding film attached to one or both sides of the film
And the light shielding sheet as a whole has transparency.
The light-shielding sheet is used as a screen,
One end of the screen to which the bar is attached
Extend the light-shielding film provided on the
That it is composed of a long base film
A roll blind, which is a feature.

In the twelfth invention, the base film
And essentially blocks transmission of ultraviolet and infrared light,
Light-shielding film attached to one or both sides of the film
And the light shielding sheet as a whole has transparency.
The slats are used as light-shielding sheets.
One end of the slat attached to the
Long light-shielding film or extended to the end
Of the base film provided
It is a vertical blind.

In the thirteenth aspect, the base film
And essentially blocks transmission of ultraviolet and infrared light,
Light-shielding film attached to one or both sides of the film
And the light shielding sheet as a whole has transparency.
And a light-shielding sheet with at least one surface as the printing surface.
It is clean and has a weight bar
One end of the clean is light-shielded, extending to the end
Film or base film extended to the end
Roll bra, characterized in that it is composed of a film
India.

In the fourteenth invention, the base film
And essentially blocks transmission of ultraviolet and infrared light,
Light-shielding film attached to one or both sides of the film
And the light shielding sheet as a whole has transparency.
And a light-shielding sheet with at least one surface as the printing surface.
Rat
One end of the rat has a light-shielding
Film, or a base film extending to the end side.
Birch carb, characterized by being composed of LUM
It is lined.

(Operation) The light-shielding sheet according to the present invention includes a light-shielding film that essentially blocks transmission of ultraviolet light.
Therefore, if a roll blind using the light-shielding sheet as a screen is used, ultraviolet rays can be cut as compared with a conventional one. Further, the light-shielding film essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore, the roll blind in which the light-shielding sheet is used as a screen is excellent in heat insulation as compared with the conventional roll blind and venetian blind. Thereby, if the roll blind according to the present invention is used, the cost of cooling and heating can be reduced.

Since the light-shielding sheet has transparency, if a roll blind using the light-shielding sheet as a screen is used, even when the screen is lowered, the outside scenery can be viewed from indoors and outdoors. Therefore, a feeling of oppression is less likely to be felt as compared with the case where a conventional roll blind or venetian blind is used.

Further, the substrate film and the light shielding film is formed by joining a multi <br/> number films. Soshi
The light-shielding film is adhered to one or both surfaces of the base film such that the seam portion of the base film and the seam portion of the light-shielding film do not coincide at the same place. Therefore, according to this laminated structure in which a number of films are connected, a light-shielding sheet having a large area and a high tensile strength can be formed.

In a roll blind in which a light-shielding sheet having at least one surface as a printing surface is a screen,
For example, by printing a company logo or the like on the printing surface, or by printing a landscape image or the like on the printing surface, it is possible to form an excellent design.

Since the screen of the roll blind can be wound up, the screen can be raised and lowered as required, unlike the case where the light-shielding glass is fitted. With this, if the roll blind is used, plenty of natural light can be taken in if necessary. Therefore, compared with the case where the light shielding glass is used,
It is possible to save the power of daytime lighting.

The conventional light-shielding film causes inconvenience such as glass breakage when directly adhered to specific glass such as netted glass or template glass. However, if the roll blind according to the present invention is used, such inconvenience does not occur. , Can be installed on any window glass. In addition, the roll blind has the same ultraviolet ray preventing effect and heat insulating effect as the light shielding glass.

Further, even when the light-shielding sheet according to the present invention is used as a slat for a vertical blind or a venetian blind, the same effect as described above can be obtained.

In a roll blind in which a thin weight bar mounting portion is formed at one end of the screen, the weight bar mounting portion of the screen can have flexibility. Therefore, even if the weight bar is attached by bending one end of the screen, no wrinkles are formed at the tip of the screen.

One end of the slat has a thin portion. In a vertical blind attached to a hanger rail, the thin portion can have flexibility at one end of the slat. When folded, no wrinkles are formed.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a light shielding sheet according to the present invention. The light-shielding sheet 1 has a base film 11 and light-shielding films 12, 12 attached to the front and back surfaces of the base film 11. The base film 11 is formed of a colorless and transparent polyethylene film. The light-shielding film 12 is a film that is transparent and essentially blocks ultraviolet and infrared rays.

The substrate film 11 is not limited to the above-mentioned polyethylene film, but is desirably a film having such a property that it does not easily expand even when heat is applied. That is, if it is a polyethylene film, a film formed of high-density polyethylene is more preferable than low-density polyethylene.

Since one side of the light-shielding film 12 (on the side of the base film 11 in FIG. 1) is previously coated with an adhesive, the light-shielding film 12 is directly attached to the base film 11 to form the light-shielding sheet 1. Just attach it.

The light-shielding film 12 is colorless,
For example, various color types such as silver, blue, and brown can be appropriately used depending on the application. Further, instead of adhering the light-shielding films 12 having the same effect to the front and back surfaces of the base film 11, light-shielding films 12 having different effects can be adhered respectively.

For example, a light-shielding film for cutting ultraviolet and infrared rays in a wide area is attached to the back surface of the base film 11, and a light-shielding film having an antibacterial / antifouling effect or flameproofing property is attached to the surface. When a film having flameproofing properties is also used, the transparency of the light-shielding sheet 1 may be slightly reduced.

Further, the light-shielding sheet 1 is formed by attaching the light-shielding film 12 to only one side of the base film 11 instead of attaching the light-shielding films 12 to both sides of the base film 11 as in the present embodiment. Can also.

Next, a case where a light shielding sheet having a large area is formed will be described. FIG. 2 is an exploded explanatory view of the light shielding sheet viewed from a cross-sectional direction. The thickness and length of the light shielding sheet in FIG. 2 are partially exaggerated so that the laminated structure can be easily understood. The same or equivalent parts as those in FIG. 1 are denoted by the same reference numerals.

The base film 11 has a thickness of 75 μm and a width of 1 μm.
Three 000 mm transparent polyethylene films are spliced in the longitudinal direction, and the seam portions 110 and 11 are further joined.
The transparent polyethylene films 111, 111 each having a thickness of 25 μm and a width of 50 mm are attached to the “0”.

The light-shielding film 12 is formed by splicing two films that essentially shield ultraviolet rays and infrared rays in the longitudinal direction. The light-shielding film 12 has a joint portion 120 that is a joint portion 110 of the base film 11.
Are attached to the front and back surfaces of the base film 11 so as not to coincide with the above. Thereby, the base film 11 and the light-shielding film 12 can be strongly bonded to each other. Therefore, according to this laminated structure in which a number of films are connected, the light-shielding sheet 1 having a large area and a high tensile strength can be formed.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the roll blind according to the present invention, FIG. 4 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, and FIG. It is the principal part enlarged explanatory drawing seen from the front side. FIG.
FIG. 7 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, and shows an embodiment different from that shown in FIG. FIG. 5 shows a screen without a weight bar.

The roll blind 2 includes a roll device 3 and
Screen 1 with weight bar 4 attached to lower end
a (see FIG. 3).

First, the roll device 3 will be described. The roll device 3 includes a frame 31, side brackets 32, 3
2. It mainly comprises a winding pipe 33, around which a screen 1a is wound. The frame 31 is provided with mounting brackets 311 and 311 for mounting the roll blind 2 on a window frame or the like.

A pulley (not visible in the drawing) is provided on the left end side of the winding pipe 33 in FIG. 3, and a pulley cover 34 is attached to the pulley. Reference numeral 35 denotes a chain hung on a pulley. By pulling the chain, the take-up pipe 33 rotates to rotate the screen 1.
a rises and falls as needed.

In the present embodiment, the chain-type roll device 3 is employed, but a one-touch type roll device having a pull-cord type or both a pull-cord type and a chain-type function is employed. Can also.

Next, the screen 1a will be described.
The screen 1a is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. Tip side of screen 1a (may be referred to as weight bar attachment 10 in this specification)
Is thin so that wrinkles do not occur when the weight bar 4 is attached (see FIG. 4). Specifically, the light-shielding films 12 provided on the front and back surfaces of the base film 11 are about 20
mm long. The long light-shielding films 12, 12 are attached to each other from the front and back sides.

Then, a double-sided tape (not shown) and a staple needle 13 are attached to the distal end side of the weight bar attaching portion 10.
Thereby, the locking plate 14 made of synthetic resin is continuously attached in the width direction of the screen 1a (see FIG. 5).

Next, the structure for attaching the weight bar 4 to the screen 1a will be described (see FIG. 4). The weight bar 4 is formed in a hollow shape, and a screen 1a is provided on its top side.
Groove 41 for locking the weight bar mounting portion 10
Are formed continuously in the longitudinal direction. Then, the distal end side of the weight bar attachment portion 10 is slightly bent inward, and the locking plate 14 is locked in the engagement groove 41 of the weight bar 4.

When the weight bar 4 is actually attached to the screen 1a, one end of the weight bar 4 is brought into contact with one end of the weight bar attaching portion 10 in the width direction, and the weight bar is attached to the engaging groove 41 while sliding. The part 10 is inserted.

When the weight bar 4 is attached to the screen 1a, the distal end side of the weight bar attaching portion 10 is bent. However, as described above, the weight bar attaching portion 10 is formed thinner than the thickness of the screen 1a main body. It is flexible and does not wrinkle on the tip side of the screen 1a. Further, caps 42, 42 are attached to both ends of the weight bar 4 (see FIG. 3).
The weight bar 4 does not come off the screen 1a.

As shown in FIG. 6, the weight bar mounting portion 10 of the screen 1a is formed by making the base film 11 longer than the light shielding films 12 on the front and back surfaces.
As shown in FIG. 7, only the light-shielding film 12 on one side can be formed to be longer than the base film 11.

Further, in this embodiment, the screen 1a is used for the roll blind, but the invention is not limited to this, and the screen 1a can be used alone as a partition.

Further, if images and characters are printed using one surface of the light-shielding sheet 1 as a printing surface, a screen 1a having excellent design properties can be obtained. For example, printing a company logo or the like on the printing surface and making it visible from the outside will be a company advertisement, and printing a landscape image or the like on the printing surface will be a part of the interior. Furthermore, since the screen 1a has transparency, when the outside scene is viewed with the screen 1a lowered, it looks as if images and characters are floating inside.

The size of the screen 1a is arbitrarily set according to the place of use and purpose. The thickness of the screen 1a is also arbitrarily set according to the place of use and purpose, but is preferably about 100 μm to 150 μm. That is, if the thickness is less than 100 μm, the films may overlap and wrinkle when the screen 1a is moved up and down. If the thickness is more than 150 μm, the screen may become too stiff and curl.

(Operation) The operation of the present embodiment will be described with reference to FIGS. The screen 1 a of the roll blind 2 has a light shielding film 12. The light-shielding film 12 essentially blocks transmission of ultraviolet light. Therefore,
If the roll blind 2 having the light shielding sheet 12 as the screen 1a is used, ultraviolet rays can be cut as compared with a conventional one. The light-shielding film 12 essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore, the roll blind 2 is also excellent in heat insulation as compared with the conventional venetian blind and roll blind.

Therefore, the roll blind 2 not only cuts the sun's rays to reduce glare, but also prevents hot air from the outdoors from flowing into the indoors in summer, and reduces the radiant heat of indoor heating in the winters. Can be prevented from escaping. Therefore, by using the roll blind 2, it is possible to reduce the cooling and heating costs.

The screen 1a has transparency, so that even when the screen 1a is lowered, it is possible to view the outside scenery from indoors. This makes it less likely to feel oppression than when using conventional venetian blinds or roll blinds.

Since the screen 1a can be wound up, the screen 1a can be raised and lowered as required, unlike the case where the light-shielding glass is fitted. As a result, plenty of natural light can be taken in as needed, and it is possible to reduce the amount of electric power for illumination.

In addition, the conventional light-shielding film causes inconvenience such as glass breakage when directly adhered to specific glass such as netted glass or template glass. However, if the roll blind 2 is used, there is no such inconvenience. Can be installed on any window glass. Further, the roll blind 2 has the same light-shielding effect and heat-insulating effect as the light-shielding glass.

Furthermore, if the roll blind 2 is used on a ship or the like, the screen 1a can be lowered during the day to prevent irregular reflection from the sea surface, and at night, the screen 1a can be raised to prevent the view from being obstructed. it can.

Furthermore, it has been difficult to easily remove the conventional cloth roll blind once it has become dirty, but since the screen 1a is formed of a synthetic resin film, it may be wiped with a rag or the like. And can easily remove dirt.

FIG. 8 is an explanatory view showing an embodiment of a vertical blind according to the present invention, FIG. 9 is an enlarged explanatory view showing a main part showing a tip side of a slat, and FIG. 10 is an explanatory view showing an AA section of FIG. 11, 11 and 12 are cross-sectional views taken along the line AA of FIG. 9 and show an embodiment different from that shown in FIG.

The vertical blind 5 mainly comprises a hanger rail 51 and a plurality of slats 1b (see FIG. 8). The slat 1b is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. 2, and is attached to the hanger rail 51 via the hook 52.

The structure for attaching the slat 1b to the hook 52 will be described (see FIG. 9). Inside the tip side of the slat 1b, a slat hanger 53 having a hook portion 531 at the center of the top and formed in a rod shape is provided. The slat 1b is attached to the hook 52 via the hook 531 that is pulled out from the hole 15 formed in the slat 1b.

Slat hanger 5 for slat 1b
3 will be described (see FIG. 10). The slat hanger 53 is wound by the light shielding film 12. The light-shielding film 12 is affixed to one side of the base film 11 and is provided so as to extend to an end portion side of the base film 11. Therefore, the tip side of the slat 1b around which the slat hanger 53 is wound is formed thinner than the thickness of the slat 1b main body. Thereby, the tip side of the slat 1b is flexible, so that even when the slat 1b is folded, no wrinkles are formed in the portion.

As shown in FIG. 11, the slat hanger 53 may be wound by the light-shielding films 12, 12 on the front and back surfaces provided to extend from the base film 11 to the end side. As shown in FIG. 12, the slat hanger 53 may be wound by the base films 11 longer than the light-shielding films 12 on the front and back surfaces.

A balance weight 54 is attached to the lower end of the slat 1b, and the slats 1b are connected to each other by a bottom cord 55 (see FIG. 8).

(Operation) The operation of the present embodiment will be described with reference to FIG. The description of the same functions as those of the first embodiment will be omitted. For this,
The same applies to the venetian blind shown in FIG. 13 described later. Since the vertical blind 5 has the slats provided in the vertical direction, the sunshine can be adjusted according to the direction of the sun.

FIG. 13 is a perspective view showing an embodiment of a venetian blind according to the present invention. The venetian blind 6 is installed on the window frame 7 and mainly includes a lifting device 61 and a plurality of slats 1c. Slat 1
c is formed by the light shielding sheet 1 shown in FIG. 1 or FIG. 2, and is connected by the lifting cords 62, 62. Reference numeral 63 denotes a bottom rail for stabilizing the slat 1c. Reference numeral 64 denotes a tilt adjusting pipe for changing the tilt angle of the slat 1c. Reference numeral 65 is a slat 1
A stopper string 65 for raising and lowering c and fixing it at a required height position.

(Operation) The operation of the present embodiment will be described with reference to FIG. Since the venetian blind 6 has the slats 1c provided in the horizontal direction, the sunshine can be adjusted according to the altitude of the sun.

The terms and expressions used in the present specification are for explanation only, are not restrictive, and do not exclude terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications are possible within the scope of the technical idea.

[0072]

The present invention has the above configuration and has the following effects. (A) The light-shielding sheet according to the present invention includes a light-shielding film that essentially blocks transmission of ultraviolet light. Therefore, if a roll blind using the light-shielding sheet as a screen is used, ultraviolet rays can be cut as compared with a conventional one. Further, the light-shielding film essentially blocks not only transmission of ultraviolet rays but also transmission of infrared rays. Therefore,
The roll blind in which the light-shielding sheet is used as a screen is superior in terms of heat insulation as compared with conventional roll blinds and venetian blinds.

(B) Since the light-shielding sheet has transparency, if a roll blind using the light-shielding sheet as a screen is used, even when the screen is lowered, the outside scenery can be viewed from indoors. Therefore, a feeling of oppression is less likely to be felt as compared with the case where a conventional roll blind or venetian blind is used.

(C) The base film and the light-shielding film are formed by joining a plurality of films. The light-shielding film is attached to one or both surfaces of the base film so that the joint of the base film and the seam of the light-shielding film do not coincide at the same place. Therefore, according to this laminated structure in which a number of films are connected, a light-shielding sheet having a large area and a high tensile strength can be formed.

(D) In the case of a roll blind in which a light-shielding sheet having at least one surface as a printing surface is a screen, for example, a company logo mark or the like is printed on the printing surface, or a landscape image or the like is printed on the printing surface. By printing or the like, a product excellent in design can be formed.

(E) Since the screen of the roll blind can be wound up, the screen can be raised and lowered as necessary, unlike the case where the light shielding glass is fitted. With this, if the roll blind is used, plenty of natural light can be taken in if necessary. Therefore, it is possible to reduce the amount of power for daytime illumination as compared with the case where the light shielding glass is used.

(F) When the conventional light-shielding film is directly adhered to a specific glass such as a netted glass or a template glass, disadvantages such as glass breakage have occurred. However, such a problem can be solved by using the roll blind according to the present invention. It can be installed on any window glass without any inconvenience. Moreover, the roll blind has the same ultraviolet ray preventing effect and heat insulating effect as the light shielding glass. It should be noted that even when the light-shielding sheet according to the present invention is used as a slat for a vertical blind or a venetian blind, the same effects as those of the above-described (a) to (f) can be obtained.

(G) In a roll blind in which a thin weight bar mounting portion is formed at one end of the screen, the weight bar mounting portion of the screen can have flexibility. Therefore, even if the weight bar is attached by bending one end of the screen, no wrinkles are formed at the tip of the screen.

(F) A thin portion is provided at one end of the slat, and the thin portion can have flexibility at one end of the slat in a vertical blind attached to a hanger rail. In addition, wrinkles are not formed even when the relevant portion is bent.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a light shielding sheet according to the present invention.

FIG. 2 is an exploded explanatory view of the light shielding sheet viewed from a cross-sectional direction.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the roll blind according to the present invention.

FIG. 4 is an enlarged explanatory view of a main part showing a cross section on the tip side of the screen.

FIG. 5 is an enlarged explanatory view of a main part when the front end side of the screen is viewed from the front side.

FIG. 6 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, showing an embodiment different from that shown in FIG. 4;

FIG. 7 is an enlarged explanatory view of a main part showing a cross section on the front end side of the screen, showing an embodiment different from that shown in FIG. 4;

FIG. 8 is an explanatory view showing an embodiment of a vertical blind according to the present invention.

FIG. 9 is an enlarged explanatory view of a main part showing a distal end side of a slat.

FIG. 10 is an explanatory diagram showing an AA cross section of FIG. 9;

FIG. 11 is an explanatory view showing a cross section taken along the line AA of FIG. 9, showing an embodiment different from that shown in FIG. 10;

FIG. 12 is an explanatory view showing a cross section taken along line AA of FIG. 9 and showing an embodiment different from that shown in FIG. 10;

FIG. 13 is a perspective view showing an embodiment of a venetian blind according to the present invention.

DESCRIPTION OF THE SYMBOLS 1 Light-shielding sheet 11 Base film 110 Seam part 111 Polyethylene film 12 Light-shielding film 120 Seam part 1a Screen 1b Slat 1c Slat 10 Weight bar mounting part 13 Needle 14 Locking plate 2 Roll blind 3 Roll device 31 Frame 311 Mounting Bracket 32 Side bracket 33 Take-up pipe 34 Pulley cover 35 Chain 4 Weight bar 41 Engagement groove 42 Cap 5 Vertical blind 51 Hanger rail 52 Hook 53 Slat hanger 15 Hole 531 Hook portion 54 Balance weight 55 Bottom cord 6 Venetian blind 61 Elevating Device 62 Elevating cord 63 Bottom rail 64 Inclination adjusting pipe 65 Stopper cord 7 Window frame

Claims (12)

[Claims] 1. A light-shielding sheet for use in a blind, comprising a light-shielding film that essentially blocks the transmission of ultraviolet light and infrared light, and wherein the light-shielding sheet as a whole has transparency. 2. A material for use in blinds, comprising: a base film; a light-shielding film which essentially blocks transmission of ultraviolet and infrared rays and is attached to one or both sides of the base film;
The light-shielding sheet is characterized in that the light-shielding sheet as a whole has transparency. 3. The base film and the light-shielding film are formed by joining a plurality of films, and the seam portion of the base film and the seam portion of the light-shielding film are configured not to coincide with each other. The light-shielding sheet according to claim 2. 4. The light-shielding sheet according to claim 1, wherein at least one surface is a printing surface. 5. A method for a blind, comprising: joining a plurality of transparent films to form a base film; joining a plurality of films essentially blocking transmission of ultraviolet light and infrared light to form a light-shielding film. A step of attaching a light-shielding film to one or both surfaces of the base film so that the seam portion of the base film and the seam portion of the light-shielding film do not coincide with each other. 6. A roll blind, wherein the light-shielding sheet according to claim 1 is used as a screen. 7. The roll blind according to claim 6, wherein a thin weight bar attaching portion is formed at one end of the screen. 8. The light-shielding sheet according to claim 2, 3 or 4, wherein the screen is provided with a weight bar.
A roll blind, comprising: a light-shielding film provided to extend to an end portion; or a base film provided to extend to an end portion. 9. A vertical blind, wherein the light shielding sheet according to claim 1 is a slat. 10. A slat has a thin portion on one end side,
The vertical blind according to claim 9, wherein the thin portion is attached to a hanger rail. 11. A light-shielding sheet according to claim 2, 3 or 4, wherein said slit is provided, and one end of the screen attached to the hanger rail is provided with a light-shielding film extended to the end, or a light-shielding film provided on the end. A vertical blind, comprising an extended base film. 12. A venetian blind, wherein the light-shielding sheet according to claim 1 is a slat.