JP6693550B2 - Daylights, roll screens and blinds - Google Patents

Description

  The present invention relates to a lighting tool having a lighting function, a roll screen, a window, a door and a blind.

  A roll-up screen having a daylighting function (hereinafter referred to as a roll screen) is known (see Patent Documents 1 and 2). The roll screens described in Patent Documents 1 and 2 include a light diffusing layer having a light transmitting portion and a light diffusing portion, and reflect light at the interface between the light transmitting portion and the light diffusing portion so that the incident light is emitted indoors. I'm trying to bounce up above.

JP, 2013-155569, A JP, 2013-157273, A

  Conventional roll screens with a daylighting function are made of non-breathable material such as resin, which shuts off the comfortable breeze from the outside, especially in the summer, making it easy for the indoor temperature to rise. In addition, there is a problem that the room cannot be ventilated.

  Further, from the viewpoint of the interior design of the room, it may be desirable to use a member other than resin (for example, cloth).

  The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a daylighting tool, a roll screen, and a blind having both daylighting property and air permeability.

In order to solve the above problems, according to one aspect of the present invention, it is provided with a daylighting section and a ventilation section arranged along a light incident surface,
The daylighting section has a light deflecting section for deflecting the light incident on the light incident surface,
The ventilation part is provided with a daylighting tool having a ventilation hole penetrating from the light incident surface to the light emitting surface on the opposite side.

  The ventilation part may include an opening formed in a part of the daylighting part.

  The opening may be arranged on at least one of the top side, the ground side, and the center side of the top and bottom when the light incident surface of the daylighting tool is arranged in the top and bottom direction.

  The ventilation part may have a fiber sheet having ventilation holes.

A plurality of the daylighting portions may be provided that are spaced apart along the light incident surface,
The fibrous sheet may be joined to the plurality of daylighting sections on the light emission surface side of the plurality of daylighting sections.

A plurality of the daylighting portions may be provided that are spaced apart along the light incident surface,
The fibrous sheet may be arranged between the plurality of daylighting sections that are arranged apart from each other along the light incident surface.

A plurality of the daylighting portions may be provided that are spaced apart along the light incident surface,
The fiber sheet is
On the light emission surface side of the plurality of daylighting sections, a plurality of fiber sheet sections joined to the corresponding daylighting tool,
Among the plurality of fiber sheet portions, a fiber joint portion that joins adjacent fiber sheet portions may be included.

  The ventilation holes of the fiber joint portion may be larger than the ventilation holes of the plurality of fiber sheets.

  The fibrous sheet may be woven, non-woven, knit, lace, or felt.

  The light deflector has a base portion having a plurality of grooves arranged apart from each other along the light incident surface, and a plurality of louvers having a refractive index different from that of the base portion and arranged in the plurality of grooves. And a part.

  A roll screen may be provided, which is provided with a mechanism that winds the above-described daylighting tool in a roll shape and deploys the wound daylighting tool in a planar shape.

A plurality of slats each having the above-mentioned lighting device,
A blind having a mechanism for changing the inclination angle of the plurality of slats may be provided.

  According to the present invention, it is possible to provide a daylighting tool, a roll screen, and a blind having both daylighting properties and air permeability.

The top view of the daylighting tool 1 by the 1st Embodiment of this invention. The figure which shows the example which formed the ventilation part 3 only in the top side. The figure which shows the example which formed the ventilation part 3 only in the ground side. The figure which shows the example which formed the ventilation part 3 only in the center side of the top and bottom. The figure which shows the shape of an opening part. The figure which shows sectional structure at the time of applying the daylighting tool 1 to the daylighting sheet 20. The top view and sectional view of the daylighting tool 1 by the 2nd Embodiment of this invention. The top view and sectional view of the daylighting tool 1 by the 1st modification of FIG. The top view and sectional view of the daylighting tool 1 by the 2nd modification of FIG. The top view and sectional view of the daylighting tool 1 by the 3rd Embodiment of this invention. The top view and sectional drawing of the lighting tool 1 by the 1st modification of FIG. The top view and sectional drawing of the lighting tool 1 by the 2nd modification of FIG. 3 is a perspective view of a roll screen according to one embodiment. FIG. 3 is a perspective view of a blind according to one embodiment. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in the drawings attached to the present specification, for convenience of illustration and understanding, the scale, the vertical and horizontal dimension ratios, etc. are appropriately changed and exaggerated.

  It should be noted that, as used in the present specification, the shapes and geometric conditions and their degrees are specified. For example, terms such as “parallel”, “orthogonal”, and “identical” and length and angle values are strict. Without being bound by the meaning, it should be interpreted in a range including the extent to which similar functions can be expected.

  Further, in the present specification, terms such as “sheet”, “film”, “plate” and the like are not distinguished from each other based only on the difference in designation. Therefore, for example, the term “sheet” is a concept including members that can also be called films and plates.

  Furthermore, in the present specification, the "sheet surface (film surface, plate surface, panel surface)" is a plane of the target sheet-shaped member when the target sheet-shaped member is viewed as a whole and generally. It refers to the surface that matches the direction. In the embodiment described below, both the daylighting part and the ventilation part, which will be described later, may be arranged in parallel or slightly inclined, but in the present specification, each layer is generically called a sheet surface. There is also. Further, in the present specification, the “normal direction” used for a sheet-shaped (film-shaped, plate-shaped, or panel-shaped) member refers to the normal direction to the sheet surface of the member.

(First embodiment)
FIG. 1 is a plan view of a daylighting tool 1 according to a first embodiment of the present invention. The lighting tool 1 of FIG. 1 can be applied to, for example, a lighting sheet 20. A normal daylighting sheet is made of resin and does not have air permeability. On the other hand, the daylighting tool 1 according to the present embodiment has a daylighting section 2 and a ventilation section 3. The ventilation part 3 in FIG. 1 is an opening formed on the daylighting tool 1, and the daylighting part 2 is a region other than the opening on the daylighting tool 1.

  The opening, that is, the ventilation portion 3 is a hole that penetrates from the light incident surface of the daylighting tool 1 to the light emitting surface on the opposite side. The ventilation part 3 is for ventilating, and the diameter and the number of openings forming the ventilation part 3 are not particularly limited, but the larger the diameter of the openings, or the area of the daylighting tool 1. The larger the ratio of the total area of the openings, the smaller the surface that can be used for daylighting, resulting in a decrease in daylighting performance, while improving air permeability. Further, when the diameter of the opening is increased, the amount of light penetrating the lighting tool 1 through the opening is increased, the antiglare property is deteriorated, and the inside from the outside can be easily seen through the opening, and the privacy is also improved. On the other hand, on the other hand, it becomes easier to see the inside from the outside through the opening, and the viewability is improved. Therefore, it is desirable to determine the place where the opening is formed, the diameter of the opening, and the number of openings in consideration of the lighting performance, the air permeability, the antiglare property, the privacy property, and the viewability.

  Although FIG. 1 shows an example in which openings are formed uniformly over the entire light incident surface of the daylighting tool 1, the openings may be formed only on a part of the light incident surface as described later, The ratio of openings per area may be non-uniform depending on the location. Further, in FIG. 1, a plurality of openings are arranged in parallel with two opposite sides of the rectangular lighting tool 1, but the arrangement direction of the plurality of openings is arbitrary.

  As described above, since the opening on the daylighting tool 1 does not have a positive effect on the daylighting performance, it is desirable to provide it in a place that does not affect the daylighting performance as much as possible. For example, when the daylighting tool 1 is applied to a window arranged in the vertical direction, the incident direction and the incident angle of light on the window change depending on the installation location, installation direction, season, and time zone of the window. Therefore, the position of the opening may be determined in consideration of the incident direction and the incident angle of light on the window. Since it is not realistic to set the position of the opening individually for each installation location of the window, a plurality of types of daylighting tools 1 having different positions where the opening is formed are prepared in advance, and the most suitable one is selected from them. Should be selected.

  2 to 4 are plan views of the daylighting tool 1 in which the ventilation part 3 is provided in a place different from that in FIG. 2 shows an example in which the ventilation part 3 is formed only on the top side, FIG. 3 shows an example in which the ventilation part 3 is formed only on the ground side, and FIG. 4 shows an example in which the ventilation part 3 is formed only on the center side of the top and bottom. Is shown.

  In all of FIGS. 1 to 4, a region in which the plurality of openings forming the ventilation part 3 are not formed is provided, and this region is the daylighting part 2 and is used for actively performing daylighting. Since the area between the adjacent openings can also be used for lighting, if it is desired to perform lighting even in the area where the openings are formed, the interval between the openings can be widened or the diameter size of the openings can be reduced. ..

  Although the opening is circular in FIGS. 1 to 4, the shape of the opening is not particularly limited. For example, as shown in FIG. 5, the shape may be triangular, square, star-shaped, elliptical, or any other shape, or a plurality of shapes may be mixed. Also, a plurality of openings having different areas may be mixed.

  The daylighting tool 1 shown in FIGS. 1 to 4 has a ventilation part 3 penetrating the daylighting tool 1 itself. Therefore, when the daylighting tool 1 of FIGS. 1 to 4 is applied to a thin daylighting sheet 20 and the daylighting sheet 20 is joined to another base material, the other base material also has air permeability. Need to be This is because when the other base material does not have air permeability, even if the daylighting sheet 20 has the vent portion 3, the other base material blocks the vent portion 3. Specific examples of other base materials will be described in the embodiments described later.

  When the daylighting tool 1 of FIG. 1 is applied to the daylighting sheet 20, the sectional structure is as shown in FIG. 6, for example. 6 includes a light control layer 7 disposed on the base material layer 6, a protective layer 8 disposed on the light control layer 7 for imparting light resistance and scratch resistance, and a base material. The daylighting sheet 20 is provided on the material layer 6 and having the design layer 13 arranged on the material layer 6 via the adhesive layer 9 for improving the design. The daylighting tool 1 according to the present embodiment may be the single daylighting sheet 20 of FIG. 6, or may be a structure in which the daylighting sheet 20 is joined to another base material as described above.

  The light control layer 7 of FIG. 6 has a base portion 11 having a plurality of grooves 10 spaced apart along the light incident surface 7a and a refractive index different from that of the base portion 11 and is arranged in the plurality of grooves 10. And a plurality of louver portions 12 to be formed. The inside of the louver portion 12 may be hollow or may be filled with a filling material having a refractive index different from that of the base portion 11.

  The louver portion 12 has a first surface 12a and a second surface 12b extending in a direction intersecting the light incident surface. The louver portion 12 changes the traveling direction of light based on the refractive index difference between the base portion 11 and the louver portion 12, at least in the first surface 12a of the interface with the base portion 11. FIG. 6 shows an example of an asymmetric structure in which all the louver portions 12 shown have a first surface 12a and a second surface 12b having different shapes. However, for some louver portions 12, the light incident surface 7a is included. It may be a symmetrical structure in which the shapes of the two surfaces connected to each other are the same.

  The cross-sectional structure of the daylighting sheet 20 that constitutes the daylighting tool 1 does not necessarily have to be formed by the base portion 11 and the louver portion 12 as shown in FIG. 6, and for example, a plurality of optical prisms are arranged along the light incident surface. The body may be positioned to bounce incident light upward diagonally.

(Manufacturing method of daylighting sheet 20)
Next, the constituent materials and manufacturing process of the daylighting sheet 20 of FIG. 6 will be described. As the material of the base portion 11, for example, a material in which a photocurable prepolymer, a reactive diluting monomer, a mold release agent, and a photopolymerization initiator are mixed and homogenized is used. As the material of the base portion 11, instead of using the ultraviolet curable resin, a curable resin such as a thermosetting resin or an electron beam curable resin may be used.

  For forming the groove 10 as shown in FIG. 6 in the base portion 11, for example, a die roll is used. The surface of the die roll is cut with a cutting tool in accordance with the shape of the groove 10 to form a plurality of convex portions corresponding to the shape of each groove 10.

  The composition of the base portion 11 is filled between the mold roll and the nip roll on which the convex portion is formed, and pressure is applied by both rolls, and the composition of the base portion 11 is cured by irradiating with ultraviolet rays from a high pressure mercury lamp, for example. , The base portion 11 is formed. After that, the base portion 11 is released from the die roller by the peeling roller, and the intermediate member including the base portion 11 is manufactured.

  As a material of the base material layer 6, for example, a transparent film such as polyethylene terephthalate (PET) or polycarbonate (PC) is used. The thickness of the base material layer 6 is 5 to 200 μm, preferably 10 to 150 μm, and more preferably 50 to 100 μm. If the thickness of the base material layer 6 is thinner than 5 μm, wrinkles may be generated during production, resulting in poor productivity. Conversely, if the thickness of the base material layer 6 is thicker than 200 μm, the cost may increase. When the ionizing radiation is irradiated through the base material layer 6 when it is cured, there is a possibility that a defect such as a loss of the ionizing radiation occurs.

  As the filler to be filled in the groove 10 of the base portion 11, for example, an ultraviolet curable resin such as a photocurable prepolymer, a reactive diluting monomer, and a photopolymerization initiator which are homogenized are used. Be done. Instead of the UV curable resin, a thermosetting resin or an electron beam curable resin may be used.

  As described above, in the present embodiment, the base portion 11 and the louver portion 12 have different refractive indexes. When the louver portion 12 is filled with the filling material, both the base portion 11 and the louver portion 12 are formed of a curable resin such as a thermosetting resin, an ultraviolet curable resin and an electron beam curable resin, but The refractive index difference can be provided between the base portion 11 and the louver portion 12 by changing the material of the resin, the type of additive contained therein, and the like. In the above description, an example in which the louver portion 12 is filled with a filling material having a refractive index different from that of the base portion 11 has been described, but the present invention is not limited to this, and the inside of the louver portion 12 is formed as a cavity so that the base portion 11 and the louver portion 12 are formed. The refractive index of the portion 12 may be different from that of the portion 12.

  The composition of the adhesive layer 9 includes, for example, one or more of a polyvinyl acetal resin, an ethylene vinyl acetate copolymer resin, an ethylene acrylic copolymer resin, a polyurethane resin and a polyvinyl alcohol resin, which are thermoplastic resins, a plasticizer, It may be used by mixing it with additives such as an antioxidant and an ultraviolet shielding agent, or may be formed by mixing an acrylic resin adhesive material, a cross-linking agent, and a diluent. The composition of the adhesive layer 9 is formed into a sheet or a film, and is placed between the daylighting sheet 20 and the transparent base material. After pressure is applied to push out air, the composition is integrated with the daylighting sheet 20 by heating. Alternatively, if it is liquid, it is applied to the release film, dried, and then attached to the daylighting sheet 20.

  Examples of the composition of the protective layer 8 include curable resins such as an ultraviolet curable resin, a thermosetting resin, and an electron beam curable resin, and examples thereof include a urethane resin and an acrylic resin. A hard filler may be added to the resin as an additive to improve scratch resistance, or a material such as an ultraviolet shielding material may be mixed and formed to improve light resistance.

  The material of the design layer 13 may be, for example, a woven fabric made of a chemical fiber or a natural fiber, or a non-woven fabric in which various fibers are entangled with each other, and a design that is printed on a transparent film. May be Preferably, a cloth as used in a general roll screen is used. The design of the design layer 13 may impair the lighting performance, and thus may be appropriately determined in consideration of the balance between the design property and the lighting performance.

When the daylighting sheet 20 is manufactured by the above-described steps, an opening is formed on the daylighting sheet 20 with a punching machine. The formed opening becomes the ventilation part 3.
It should be noted that the daylighting sheet 20 in the state in which the opening is not formed is also attached to a base material such as a transparent base material having no opening, and then an opening penetrating the daylighting sheet 20 and the base material is formed to form the daylighting tool 1 May be completed.

  As described above, in the first embodiment, since the ventilation part 3 is provided in the daylighting tool 1, not only the daylighting performance but also the air permeability can be provided.

(Second embodiment)
In the second embodiment described below, the daylighting tool 1 is manufactured by combining a sheet-shaped daylighting section 2 and a fiber sheet.

  FIG. 7 is a plan view and a sectional view of the daylighting tool 1 according to the second embodiment of the present invention. The daylighting tool 1 of FIG. 7 is applicable to, for example, a roll screen, and is made thin using a flexible material.

  The daylighting tool 1 in FIG. 7 includes a plurality of daylighting sheets 20 that are arranged apart from each other along the light incident surface, and one or a plurality of fiber sheets 21 that connect adjacent daylighting sections 2 to each other. The daylighting sheet 20 has the same structure as in FIG.

  For example, when the light-incident surface of the daylighting tool 1 of FIG. 7 is arranged in the vertical direction, the plurality of daylighting sheets 20 are arranged in the vertical direction. Therefore, the daylighting sheet 20 and the fiber sheet 21 are alternately arranged in the vertical direction.

  The lighting sheet 20 and the fiber sheet 21 are joined to each other, for example, by providing a glue margin along the edges of the daylighting sheet 20 and the fibrous sheet 21 and attaching an adhesive to the glue margin to join the lighting sheet 20. do it.

  The daylighting sheet 20 of FIG. 7 has only the daylighting part 2 and does not have the ventilation part 3. The fiber sheet 21 may be a woven fabric in which various fibers such as silk yarn, cotton yarn, wool yarn, and chemical fiber are woven, a non-woven fabric in which various fibers are not woven, or a knitted fabric in which various fibers are knitted, A race using various fibers or a felt obtained by compressing various fibers into a thin plate may be used. However, the fiber sheet 21 of the present embodiment has ventilation holes for ventilation.

  Although the daylighting sheet 20 of FIG. 7 does not have air permeability, since the fiber sheet 21 has air permeability, airflow can be performed in the area between the daylighting sheets 20 where the fiber sheet 21 is exposed.

  Further, since the fiber sheet 21 has a ventilation hole, it is possible to allow the incident light to pass through the ventilation hole to some extent, but the effect of jumping the incident light obliquely upward cannot be expected. On the other hand, since the daylighting sheet 20 includes the louver portion 12 and the base portion 11 as shown in FIG. 6, for example, the incident light can be slanted upward.

  As described above, in the daylighting tool 1 of FIG. 7, when the light-incident surface is arranged in the vertical direction, the daylighting sheet 20 and the fiber sheet 21 are alternately arranged in the vertical direction, so that the daylighting sheet 20 performs daylighting. The fiber sheet 21 can be ventilated, so that both lighting and ventilation can be performed.

  8 is a plan view and a sectional view of the daylighting tool 1 according to the first modified example of FIG. 7, and FIG. 9 is a plan view and a sectional view of the daylighting tool 1 according to the second modified example of FIG. 7. 8 and 9 show plan views seen from the light emitting surface side of the daylighting tool 1.

  In the daylighting tool 1 of FIG. 8, a fiber sheet 21 having the same size as each daylighting sheet 20 is joined to the light emitting surface of each daylighting sheet 20. The fiber sheets 21 adjacent to each other are connected by the fiber joint portion 22. The fiber joint portion 22 is formed by extending a part of the fiber yarn in the fiber sheet 21. In this way, the common fiber yarn is stretched over the fiber sheet 21 and the fiber joint portion 22, and the joint strength between the fiber sheet 21 and the fiber joint portion 22 can be increased.

  The number of fiber threads in the fiber joint portion 22 is significantly smaller than the number of fiber threads in the fiber sheet 21, and the opening ratio of the fiber joint portion 22 is higher than that of the fiber sheet 21. Therefore, the air flow rate of the fiber joint portion 22 can be further increased, and the air permeability can be further improved as compared with FIG. 7.

  In the case of FIG. 8, since the fiber sheet 21 is arranged on the light emitting surface side of the daylighting sheet 20, a part of the light emitted from the daylighting sheet 20 is absorbed or diffused by the fiber sheet 21, and the light is collected. Performance is expected to decline. In order to suppress the deterioration of the lighting performance, it is desirable to increase the ratio of the ventilation holes of the fiber sheet 21 bonded to the lighting sheet 20 as much as possible.

  In the case of FIG. 8, the adjacent fiber sheets 21 are connected to each other by the fiber joint portion 22 made of fiber yarns extending in one direction, which is not always sufficient in terms of strength. Therefore, as shown in FIG. 9, the fiber joint portion 22 may be formed of not only a fiber thread extending in one direction but also a fiber thread extending in two intersecting directions. Accordingly, the fiber joining portion 22 has a structure in which the warp yarns and the weft yarns are entangled with each other, and the adjacent fiber sheets 21 can be joined more firmly. Further, the fiber joint portion 22 may be made of a woven fabric, a non-woven fabric, a knitted fabric, a lace, or a felt, as in the case of the fiber sheet 21, because the ratio of the ventilation holes per unit area is higher than that of the fiber sheets 21 on both sides thereof. At the same time, the ratio of the ventilation holes may be made larger than that of the fiber sheet 21. Since the fiber joining portion 22 needs to have a smaller number of fiber threads per unit area than the fiber sheet 21, it is not necessary to configure the warp threads or the weft threads alone as in FIGS. May be arranged irregularly.

  As described above, in the second embodiment, since the fiber sheet 21 or the fiber joint portion 22 is arranged between the plurality of daylighting sheets 20 that are arranged apart from each other, even if the daylighting sheet 20 itself does not have air permeability. The air can be ventilated from between the adjacent lighting sheets 20.

  In addition, although it is partially used, the use of the fiber sheet 21 makes it possible to manufacture the daylighting tool 1 which is more excellent in design than the daylighting sheet 20 is exposed. Since the fiber sheet 21 is made of various materials and has many different colors than the daylighting sheet 20, it is possible to improve the daylighting property, the air permeability and the designability by selecting the fiber sheet 21 suitable for the interior of the installation place. Can be planned.

(Third Embodiment)
In the above-described second embodiment, an example in which a plurality of fiber sheets 21 are provided has been described, but the third embodiment described below is characterized in that one fiber sheet 21 is provided.

  FIG. 10 is a plan view and a sectional view of the daylighting tool 1 according to the third embodiment of the present invention. Since the daylighting tool 1 according to the third embodiment is also composed of the daylighting sheet 20 and the fiber sheet 21 made of a thin material, it can be applied as a roll screen, for example.

  FIG. 10 shows a plan view of the daylighting tool 1 viewed from the light emitting surface side. The daylighting tool 1 in FIG. 10 includes a daylighting sheet 20 having an opening formed therein, and a fiber sheet 21 joined to a light emitting surface of the daylighting sheet 20. Although the fiber sheet 21 is illustrated as being joined to a part of the light emitting surface of the daylighting sheet 20 in FIG. 10, the fiber sheet 21 may be joined to the entire surface of the light emitting surface of the daylighting sheet 20.

  Since the daylighting sheet 20 has an opening, as in the first embodiment, the region where the opening is formed serves as the ventilation part 3, and the other region serves as the daylighting part 2.

  In the present embodiment, at least a part of the opening of the daylighting sheet 20 is covered with the fiber sheet 21, but since the fiber sheet 21 has the ventilation holes as described in the second embodiment, the air permeability is secured. ..

  Further, unlike the second embodiment, the fiber sheet 21 is not a divided structure but is connected continuously, so that it is not necessary to provide the fiber joint portion 22, the structure is simplified, and manufacturing is facilitated. The durability is improved.

  11 is a plan view and a sectional view of the daylighting tool 1 according to the first modified example of FIG. 10, and FIG. 12 is a plan view and a sectional view of the daylighting tool 1 according to the second modified example of FIG. 11 and 12 also show plan views seen from the light emitting surface side of the daylighting tool 1. 11 and 12, the fiber sheet 21 is illustrated as being bonded to only a part of the light emitting surface of the daylighting sheet 20, but the fiber sheet 21 is entirely attached to the light emitting surface of the daylighting sheet 20. May be joined together.

  In the daylighting tool 1 of FIG. 11, as in FIG. 7, a plurality of daylighting sheets 20 are arranged apart from each other. The plurality of daylighting sheets 20 are joined to one fibrous sheet 21 at the light emitting surface. Therefore, only the fiber sheet 21 is arranged between the two adjacent daylighting sheets 20, and ventilation can be performed through the fiber sheet 21.

  Further, since the plurality of daylighting sheets 20 can be fixed by the single fiber sheet 21, the structure is simplified and the manufacturing is facilitated.

  In the daylighting tool 1 of FIG. 11, since the fiber sheet 21 is bonded to the light emitting surface of the daylighting sheet 20, a part of the light emitted from the daylighting sheet 20 is absorbed or diffused by the fiber sheet 21, and the daylighting performance is improved. It may fall. Therefore, it is desirable to increase the ratio of ventilation holes in the fiber sheet 21 as much as possible to improve both the daylighting property and the air permeability.

  The daylighting tool 1 of FIG. 12 is different from that of FIG. 11 in that the ventilation part 3 is formed in the daylighting sheet 20. By providing an opening in the daylighting sheet 20, it is possible to provide air permeability even in the area where the daylighting sheet 20 and the fiber sheet 21 overlap.

  As described above, in the third embodiment, one fiber sheet 21 is joined to the light emitting surface of one or more daylighting sheets 20, so that the structure is simplified and the manufacturing and assembling are easier than in the second embodiment. become. In the case of the third embodiment, the daylighting sheet 20 and the fiber sheet 21 are at least partially overlapped with each other, but by increasing the ratio of the ventilation holes in the fiber sheet 21, both daylighting and air permeability are achieved. be able to.

  The daylighting tool 1 according to the above-described first to third embodiments can be applied to the daylighting sheet 20 attached to a window or the like, the roll screen 23 shown in FIG. 13, the blind 24 shown in FIG. 14, and the like.

  The roll screen 23 shown in FIG. 13 is installed, for example, in the vicinity of a window, and can be wound around a roll shaft provided near the upper end of the window. In the unfolded state, the roll screen 23 is arranged so as to cover the entire window, but the light incident on the light incident surface of the roll screen 23 through the window is flipped up obliquely upward by the daylighting section 2 to move toward the ceiling. proceed. Further, if the window is opened, the air is taken in and out through the ventilation part 3 in the roll screen 23.

  The blind 24 in FIG. 14 has a plurality of slats 25 that are arranged close to a window and whose tilt angle is adjustable, for example. Each slat 25 has a structure similar to that of the daylighting tool 1 according to the above-described first to third embodiments. The light that has entered the light incident surface of the slat 25 through the window is flipped upward in the daylighting section 2 and travels toward the ceiling. Further, if the window is opened, air is taken in and out through the ventilation part 3 in the slat 25.

  In FIG. 13 and FIG. 14, the ventilation part 3 is shown in a large size for the purpose of conceptual description, but in consideration of the lighting performance, the antiglare property, the viewability and the privacy property, the ventilation part 3 is considered. It is desirable to adjust the placement location, number, and diameter size.

  In addition, the lighting tool 1 according to the first to third embodiments can be widely applied to doors, screen doors, and the like. For example, when the daylighting tool 1 according to the first to third embodiments is incorporated into a door, the light incident on the door can be jumped up obliquely and also has air permeability. Therefore, ventilation can be performed without opening the door, and crime prevention can be achieved.

  When the daylighting tool 1 according to the first to third embodiments is incorporated in a screen door, the size of the openings of the daylighting sheet 20 and the fiber sheet 21 is large enough to prevent invasion of insects such as mosquitoes and flies. Have The conventional screen door does not consider daylighting, but if the screen door uses the daylighting tool 1 according to the second or third embodiment, it can have a daylighting property in addition to the original function of the screen door. ..

  Aspects of the present invention are not limited to the individual embodiments described above, but include various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the contents described above. That is, various additions, changes and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and the equivalents thereof.

1 daylighting tool, 2 daylighting part, 3 ventilation part, 6 base material layer, 7 light control layer, 8 protective layer, 9 adhesive layer, 10 groove, 11 base part, 12 louver part, 13 design layer, 20 daylighting sheet, 21 Fiber sheet, 22 fiber joints, 23 roll screen, 24 blinds, 25 slats

Claims (7)

It is equipped with a lighting part and a ventilation part arranged along the light incident surface,
The daylighting section has a light deflecting section for deflecting the light incident on the light incident surface,
The light deflecting unit has a base unit having a plurality of grooves spaced apart along the light incident surface and a plurality of louvers having a refractive index different from that of the base unit. And a section,
When viewed cross-section parallel to a direction in which the normal direction and the plurality of grooves of the light incident surface is spaced apart, for said louver portion of part, the two surfaces continuous with the light incident surface It is a symmetrical structure with the same shape,
The ventilation portion has a ventilation hole penetrating from the light incident surface to the light emission surface on the opposite side thereof, and includes an opening formed in a part of the daylighting portion,
The said opening part is arrange | positioned at either one of the top side and the ground side when the light-incidence surface of the said daylighting device is arrange | positioned in the up-and-down direction, and is not arrange | positioned at the other. The daylighting tool according to claim 1, wherein the opening is formed of one or more of a circle, a triangle, a square, a star, and an ellipse. The daylighting tool according to claim 1, wherein the ventilation part includes a plurality of the openings having different areas in a mixed manner. The daylighting tool according to any one of claims 1 to 3, wherein a ratio of the openings per unit area of the openings is uneven on a light incident surface of the daylighting tool. The daylighting tool according to claim 1, wherein the inside of the louver portion is hollow. A roll screen provided with a mechanism for winding the daylighting tool according to any one of claims 1 to 5 in a roll shape and deploying the wound daylighting tool in a planar shape. A plurality of slats each having the lighting device according to any one of claims 1 to 5;
A blind including a mechanism for changing the inclination angle of the plurality of slats.