WO2018203503A1 - Daylighting device - Google Patents

Abstract

A daylighting device according to one mode of the present invention is provided with: a daylighting member that has a base material in which at least a part thereof is light-transmissive, a plurality of light-transmissive first daylighting parts provided on a first surface of the base material, and light-transmissive gaps provided between the plurality of daylighting parts; and a support member that supports the daylighting member. Portions of lateral surfaces of the daylighting parts in contact with the gaps serve as reflection surfaces that reflect light incident on the daylighting parts. The daylighting parts have characteristics of dispersing and emitting light reflected on the reflection surfaces in directions crossing a direction in which the daylighting parts extend. The plurality of daylighting parts extend at an angle of -45 to +45° with respect to an end edge of the base material along the vertical direction.

Description

Daylighting equipment

One embodiment of the present invention relates to a lighting device.
This application claims priority based on Japanese Patent Application No. 2017-091281 filed in Japan on May 1, 2017, the contents of which are incorporated herein by reference.

It is known that a daylighting device is provided on the indoor side of the window or on the outdoor side of the window in order to efficiently guide sunlight into the room from the window.
For example, Patent Document 1 describes a daylighting device that is installed outside the window and has a prism that runs in a vertical direction (vertical direction). The sunlight that has entered the daylighting device is reflected inside the prism (lighting unit) and is generally reflected in the incident direction of sunlight. By installing this device on the outdoor side of the east window, it is possible to reflect the sun light tilted west and bring it into the room from the east window.

Japanese Patent No. 4339579

However, the type installed outdoors has a complicated structure, and once installed, it is not easy to remove or switch the optical function. Further, since the light can be reflected only in the incident direction, the direction of the installable window is limited.

One aspect of the present invention has been made in view of the above-mentioned problems of the prior art, and can obtain a daylighting effect regardless of the orientation of the window, and can be easily removed and switched between optical functions. An object is to provide a daylighting apparatus.

The daylighting device according to one aspect of the present invention includes a base material having light permeability at least in part, a plurality of first daylighting units having light transmittance provided on a first surface of the base material, and the plurality of the daylighting devices. A daylighting member having a gap provided between the daylighting parts, and a support member that supports the daylighting member, and a part of a side surface of the daylighting part in contact with the gap is provided in the daylighting part. It functions as a reflecting surface that reflects incident light, and the daylighting unit has a characteristic that the light reflected by the reflecting surface is dispersed and emitted in a direction intersecting the extending direction of the daylighting unit, The plurality of daylighting portions extend in the vertical direction and extend at an angle of −45 ° or more and + 45 ° or less with respect to the second end side intersecting the first end side along the horizontal direction of the base material. .

Further, in the daylighting device of one embodiment of the present invention, the plurality of daylighting units may be configured to be parallel to the second end side.

The daylighting device according to one aspect of the present invention includes a light diffusion member that is provided on either the light incident side or the light emission side of the daylighting member and diffuses the light isotropically or anisotropically. It is good also as a structure.

Moreover, the lighting device of 1 aspect of this invention WHEREIN: The said lighting member has the 1st lighting area | region which has several 1st lighting parts extended at a 1st angle with respect to the said 2nd edge of the said base material. And a second daylighting area having a plurality of second daylighting portions extending at a second angle with respect to the second end side of the base material.

Further, in the daylighting device of one aspect of the present invention, the support member is a frame-like frame that supports an outer peripheral edge of the daylighting member, and a first attachment portion provided at a part of the outer peripheral edge of the daylighting member; And a second mounting portion provided at a position rotated by a predetermined angle with respect to the first mounting portion in the outer peripheral edge.

Further, in the daylighting device of one aspect of the present invention, the plurality of slats having the base material extending in one direction and the plurality of slats are connected with the longitudinal direction of the slats oriented in the horizontal direction. And a support member that supports the slats in a form that suspends the slats in the up-down direction, and the second end side of the base material may be configured along the short-side end side of the slats.

In the daylighting device of one aspect of the present invention, the slat has a shape bent or curved in a cross section perpendicular to the longitudinal direction of the daylighting member, and the first portion adjacent to the slat via the bent portion. And it is good also as a structure which has the said some lighting part in the at least one side of the 2nd part.

In the daylighting device of one embodiment of the present invention, the plurality of daylighting units may extend from the first part to the second part.

In the daylighting device of one aspect of the present invention, the slat has a plurality of first daylighting portions in the first portion, and a direction intersecting the extending direction of the first daylighting portion in the second portion. It is good also as a structure which has several 2nd daylighting parts extended to.

Further, in the daylighting device according to one aspect of the present invention, the slat may include the plurality of daylighting units in the first part and a reflecting surface in the second part.

Further, in the daylighting device of one aspect of the present invention, a plurality of slats having the base material extending in one direction, and the support member that supports the longitudinal direction of the plurality of slats in a vertically suspended manner, It is good also as a structure where the said 2nd end side of the said base material follows the edge side of the transversal direction of the said slat.

In the daylighting device of one embodiment of the present invention, the slat may be divided into a plurality of parts in the longitudinal direction, and different optical functions may be given to the divided areas.

Further, in the daylighting apparatus of one aspect of the present invention, a daylighting screen having the base material and the plurality of first daylighting portions, and a winding mechanism that supports the daylighting screen so as to be able to wind and unwind in the vertical direction. The plurality of daylighting units may be configured to extend at an angle between −45 ° and + 45 ° with respect to an edge along the winding and feeding direction of the daylighting screen.

According to one embodiment of the present invention, it is possible to provide a daylighting device that can obtain a daylighting effect regardless of the direction of the window and can be easily removed and the optical function can be switched.

The front view which looked at the state which installed the lighting device 10 in 1st Embodiment in the window from the indoor side. Sectional drawing of the state which installed the lighting device 10 in 1st Embodiment in the window. The perspective view which shows the lighting panel of the lighting apparatus 10 in 1st Embodiment. The front view which shows the variation of the extension direction of the some lighting part 14 in the lighting panel 11. FIG. The figure which shows the case where the cross-sectional shape of the direction which cross | intersects the extending direction of the some lighting part 14 in the lighting panel 11 is a right triangle shape. The figure which shows the case where the cross-sectional shape of the direction which cross | intersects the extending direction of the some lighting part 14 in the lighting panel 11 is trapezoid. The figure which shows the case where the cross-sectional shape of the direction which cross | intersects the extending direction of the some lighting part 14 in the lighting panel 11 is a hexagonal shape. The figure which shows the case where the cross-sectional shape of the direction which cross | intersects the extending direction of the some lighting part 14 in the lighting panel 11 is a multi taper shape. The top view which looked at the lighting apparatus 10 in 1st Embodiment from the ceiling side. It is a figure which shows the example of installation of the lighting apparatus 10 in 1st Embodiment, Comprising: The figure seen from the ceiling side. The perspective view which shows the lighting condition of the lighting apparatus 10 in 1st Embodiment. The perspective view which shows the other example of installation of the lighting apparatus 10 in 1st Embodiment. The side view which shows the example of installation of the lighting apparatus 10 shown in FIG. The top view which shows an example of the structure (separate member) of the lighting apparatus 20 of 2nd Embodiment. The perspective view which shows a lenticular lens as an example of the light-diffusion member in 2nd Embodiment. The perspective view which shows a micro lens array as an example of the light-diffusion member in 2nd Embodiment. The top view which shows 20 A of lighting apparatuses of the structural example 2 in 2nd Embodiment. It is a top view which shows the lighting devices 20B and 20C of the structural example 3 in 2nd Embodiment, Comprising: The figure which shows the case where it is a bonding type. It is a top view which shows the lighting apparatuses 20B and 20C of the structural example 3 in 2nd Embodiment, Comprising: The figure which shows the case where it is an integral formation type. The figure which shows the combination of the lighting panel 11 on the left side in the figure, and the lenticular lens sheet 22A on the right side in the figure. The figure which shows the combination of the lighting panel 11 on the left side in the figure, and the lenticular lens sheet 22A on the right side in the figure. The front view which shows the structure of the lighting panel 11. FIG. The front view which shows the structure of 22 A of lenticular lens sheets as the light-diffusion member 22. FIG. The front view which shows the structure of the lighting panel 11. FIG. The front view which shows the structure (4 divisions) of the light-diffusion member 22. FIG. The front view which shows the structure of the lighting panel 11. FIG. The front view which shows the structure of the light-diffusion member 22. FIG. The figure which shows the other structural example of the light-diffusion member 22 in 2nd Embodiment. Sectional drawing which shows the other structural example of the light-diffusion member 22 in 2nd Embodiment. The perspective view which shows the other structural example of the light-diffusion member 22 in 2nd Embodiment. The figure which shows the other structural example of the light-diffusion member 22 in 2nd Embodiment. The figure which shows the other structural example of the light-diffusion member 22 in 2nd Embodiment. It is a figure which shows the external appearance of the lighting blind 30 of 3rd Embodiment, Comprising: The perspective view seen from the indoor side. The figure which looked at the daylighting blind 30 of 3rd Embodiment from the side. The perspective view which shows the structure of the daylighting slat 31. FIG. FIG. 26B is a BB sectional view of FIG. 26A. CC sectional drawing of FIG. 26A. The perspective view seen from the outdoor side of the daylighting blind 30. FIG. Sectional drawing which shows a mode that the daylighting blind 30 is a closed state. Sectional drawing which shows a mode that the lighting blind 30 is an open state. The perspective view which shows the modification of the daylighting slat 39 in 3rd Embodiment. Sectional drawing which shows the structure of the daylighting slat 301 which has a light-diffusion function. Sectional drawing which shows the structure of the lighting slat 302 which has a light-diffusion function. Sectional drawing which shows the structure of the daylighting slat 303 which has a light-diffusion function. Sectional drawing which shows the structure of the lighting slat 304 with a light-diffusion function. Sectional drawing which shows the structure of the lighting slat 305 which has a light-diffusion function. It is a figure which shows a part of external appearance of the daylighting blind 40 of 4th Embodiment, Comprising: The perspective view seen from the outdoor side. The perspective view which shows the structure of the daylighting slat 41 of 4th Embodiment. The side view which shows the lighting condition in the lighting blind 40 of 4th Embodiment. It is a figure which shows a part of external appearance of the lighting blind 50 of 5th Embodiment, Comprising: The perspective view seen from the outdoor side. The side view which shows the lighting condition in the lighting blind 50 of 5th Embodiment. The perspective view which shows the lighting blind 55 as a modification of 5th Embodiment. The perspective view which shows the external appearance of the daylighting blind 60 of 6th Embodiment. The perspective view which shows the structure of the lighting slat 62 of the lighting blind 60 of 6th Embodiment. The perspective view which shows the modification of the daylighting slat 62 of 6th Embodiment. The 1st figure which looked at the mode of the room which installed the lighting blind 60 of 6th Embodiment in the window of the east side of the room from the ceiling side. The 2nd figure which looked at the mode of the room which installed the lighting blind 60 of 6th Embodiment in the window of the east side of the room from the ceiling side. The perspective view which shows the external appearance of the daylighting roll screen 70 of 7th Embodiment. The 1st sectional view showing the situation at the time of use of daylighting roll screen 70 in a 7th embodiment. The 2nd sectional view showing a situation at the time of use of daylighting roll screen 70 in a 7th embodiment. The 1st figure which shows the structure of the daylighting roll screen 77 which is a modification of 7th Embodiment, and the mode at the time of use. The 2nd figure which shows the structure at the time of use and the structure of the daylighting roll screen 77 which is a modification of 7th Embodiment.

Many existing daylighting devices have a prism (hereinafter referred to as a daylighting section) extending in the horizontal direction, and the incident sunlight is emitted toward the indoor ceiling to illuminate the ceiling. Can do. As a result, an effect with an emphasis on energy-saving lighting can be obtained.
On the other hand, in each daylighting device according to one aspect of the present invention, attention is focused on the point that the light is reflected in the horizontal direction by changing the extending direction of the daylighting unit in the vertical direction and the light is spread in the horizontal direction in the room. did.

In the three-dimensional orthogonal coordinate system (XYZ coordinate system) shown as appropriate in each drawing, the Z-axis direction is the vertical direction Z. The X-axis direction and the Y-axis direction are one direction in the horizontal direction orthogonal to the Z-axis direction and are orthogonal to each other.

Below, the structure of each embodiment of the lighting apparatus which concerns on this invention is demonstrated in detail.
In the following drawings, in order to make each component easy to see, the scale of dimensions may be different depending on the component.

[First embodiment]
Hereinafter, the configuration of the daylighting apparatus 10 according to the first embodiment of the present invention will be described.
Drawing 1 is a front view which looked at the state where lighting device 10 in a 1st embodiment was installed in a window from the room inner side. FIG. 2 is a cross-sectional view of the daylighting device 10 according to the first embodiment installed in a window. FIG. 3 is a perspective view showing a daylighting panel of the daylighting apparatus 10 according to the first embodiment.
FIG. 4 is a front view showing variations in the extending direction of the plurality of daylighting sections 14 in the daylighting panel 11. 5A to 5D are diagrams showing variations in cross-sectional shape in the direction intersecting the extending direction of the plurality of daylighting sections 14 in the daylighting panel 11. FIG. FIG. 6 is a top view of the daylighting apparatus 10 according to the first embodiment as viewed from the ceiling side. FIG. 7 is a diagram illustrating an installation example of the daylighting apparatus 10 according to the first embodiment, as viewed from the ceiling side. FIG. 8 is a perspective view showing a daylighting state of the daylighting apparatus 10 according to the first embodiment. FIG. 9 is a perspective view showing another installation example of the daylighting apparatus 10 according to the first embodiment. FIG. 10 is a side view showing an installation example of the daylighting apparatus 10 shown in FIG.

The daylighting apparatus 10 according to the present embodiment is attached to, for example, an indoor ceiling or an upper wall portion 1004 of a window as shown in FIGS. The daylighting apparatus 10 is disposed so as to cover at least the upper part of the window glass 1003. The daylighting apparatus 10 is installed with the width direction parallel to the X direction and the thickness direction parallel to the Y direction. The daylighting apparatus 10 is installed in a state of being hung on the indoor side.

The daylighting apparatus 10 includes a daylighting panel (daylighting member) 11, a frame (supporting member) 12 that supports the daylighting panel 11, and a fixing jig for fixing the daylighting panel 11 together with the frame 12 to the upper wall portion 1004 of the window. 13.

As shown in FIG. 3, the daylighting panel 11 includes a base material 11A having light permeability, a plurality of daylighting units 14 having light transmittance provided on the first surface 11a of the base material 11A, and a plurality of daylighting units. And a gap portion 15 provided between the portions 14. In the daylighting panel 11, a part of the side surface 14 a of each daylighting unit 14 in contact with the gap 15 functions as a reflecting surface that reflects light incident on the daylighting unit 14 in a direction intersecting the extending direction.

In the daylighting panel 11, as shown in FIG. 3, the plurality of daylighting portions 14 extend along the end side 11c along the vertical direction of the base 11A, and are parallel to the end side 11c. As shown in FIG. 3, each daylighting portion 14 extends in the Z direction of the base material 11 </ b> A and is provided side by side in the X direction of the base material 11 </ b> A. The daylighting unit 14 is composed of a prism body whose cross-sectional shape intersecting the extending direction is an isosceles triangle. The shape of the daylighting section 14 is not limited to the isosceles triangle shape in section, but a right-angled triangle shape as shown in FIG. 5A, a trapezoidal shape as shown in FIG. 5B, a hexagonal shape as shown in FIG. 5C, or a multitaper shape as shown in FIG. There is no particular limitation. The light incident on the daylighting unit 14 is refracted (reflected) in the horizontal direction on the side surface 14a, which is a reflection surface, and is emitted into the room. Moreover, the lighting panel 11 may be arrange | positioned so that the fine structure surface which has the some lighting part 14 may face an outdoor side, and may be arrange | positioned so that the said fine structure surface may face the indoor side.

Further, in FIG. 3, only ten daylighting units 14 are shown, but actually, a larger number of daylighting units 14 are provided on the base material 11A.

Further, the extending direction of the daylighting unit 14 is not limited to the vertical direction. For example, as illustrated in FIGS. 3 and 4, a plurality of daylighting units with the end 11 c of the base material 11 </ b> A as a reference (0 °: upper and lower). 14 is inclined at a predetermined angle with respect to an end side (first end side) 11e along the horizontal direction of the substrate 11A, that is, an end side (second end side) 11c along the vertical direction. It may be. In this case, it is desirable to incline at an angle θ between −45 ° and + 45 ° with respect to the edge 11c. When the extending direction of the daylighting unit 14 is substantially horizontal, the light incident on the daylighting unit 14 is emitted in the vertical direction of the room, so that the effect of brightening the left-right direction of the room is small. On the other hand, when the daylighting unit 14 is inclined at an angle θ between −45 ° and + 45 ° with respect to the end side 11c, the light incident on the daylighting unit 14 is moved substantially in the left-right direction. The injection occupies the majority.

Moreover, a plurality of regions in which the extending direction of the daylighting unit 14 is different from each other may exist in one daylighting panel 11.

The base material 11A is made of a light transmissive resin such as a thermoplastic polymer, a thermosetting resin, or a photopolymerizable resin. Further, as the light transmissive resin, those made of acrylic polymer, olefin polymer, vinyl polymer, cellulose polymer, amide polymer, fluorine polymer, urethane polymer, silicone polymer, imide polymer, etc. are used. be able to. Among them, for example, polymethyl methacrylate resin (PMMA), triacetyl cellulose (TAC), polyethylene terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC), polyethylene naphthalate (PEN), polyethersulfone (PES), polyimide (PI), etc. can be used suitably. The total light transmittance of the substrate 11A is preferably 90% or more as defined in JIS K7361-1. Thereby, sufficient transparency can be obtained.

The daylighting unit 14 is made of an organic material having light transmissivity and photosensitivity such as acrylic resin, epoxy resin, and silicone resin. Moreover, what mixed the polymerization initiator, the coupling agent, the monomer, the organic solvent, etc. can be used for these organic materials. Furthermore, the polymerization initiator contains various additive components such as a stabilizer, an inhibitor, a plasticizer, a fluorescent brightening agent, a release agent, a chain transfer agent, and other photopolymerizable monomers. Also good. In addition, materials described in Japanese Patent No. 41299991 can be used. The total light transmittance of the daylighting unit 34 is preferably 90% or more in accordance with JIS K7361-1. Thereby, sufficient transparency can be obtained.

Further, the base material 11A and the plurality of daylighting units 14 may be integrally formed using the same material.

The frame 12 has a rectangular frame shape when viewed from the front on the indoor side, and has an opening 12a on the inside. The frame 12 holds the periphery of the daylighting panel 11 fitted in the opening 12a.
As shown in FIGS. 1 and 2, the frame 12 has a pair of fixing holes (first mounting portions) 12 </ b> B and 12 </ b> B. The pair of fixing holes 12B and 12B are holes for screwing or inserting the fixing screw 13B, and are formed in the upper frame portion 12a1 of the frame 12.

The fixing jig 13 has at least a fixing screw 13B.

The daylighting apparatus 10 having such a configuration may be directly screwed to the wall portion 1004 on the upper side of the window, or, for example, a fixing plate 13A as shown in FIG. Good.
In this case, for example, the fixing plate 13A may be attached in advance to the wall portion 1004 of the installation location, and the lighting device 10 may be installed by screwing to the fixing plate 13A. Or you may install by methods other than screwing.

When sunlight is incident on the daylighting apparatus 10 of this embodiment, the plurality of daylighting units 14 of the daylighting panel 11 are refracted in the arrangement direction (horizontal direction: X direction) of the daylighting units 14 and emitted into the room. The light is refracted to either the left or right in the room depending on the position incident on the daylighting unit 14. Although some light travels straight in the direction perpendicular to the daylighting panel 11, most of the incident light is dispersed and diffused in the horizontal direction.

Many of the existing daylighting devices have a daylighting panel in which a plurality of first daylighting parts extend in the horizontal direction, and when used in windows that receive a lot of direct sunlight (for example, in the northern hemisphere (Japan)) It is mainly configured to be installed in the south window). For this reason, when the daylighting device is installed in the east side window or the west side window, most of the light incident on the daylighting panel is emitted toward the north side by the plurality of first daylighting units extending in the horizontal direction. It was difficult to spread the light toward the left-right direction of the window (south side or west side of the room). In addition, in the case of a configuration in which the extending direction of each first daylighting unit is a horizontal direction, since it has a function of refracting incident light upward, when installed below the eyes of a person in the room The glare from the light toward the ceiling enters the human eye.

On the other hand, according to the daylighting apparatus 10 of the present embodiment, since the light can be refracted in the horizontal direction by the plurality of daylighting portions 14 extending in the vertical direction, the sunlight incident on the daylighting panel 11 is room. It is possible to expand in the left-right direction (lateral direction). Therefore, if the daylighting device 10 of this embodiment is installed in the east side window or the west side window, a plurality of daylighting units 14 extending in the vertical direction allow light incident on the daylighting panel 11 to be transmitted in the left-right direction of the window (inside the room). It can be expanded to the south or west).

For this reason, the lighting device 10 of this embodiment can be installed irrespective of the direction of the window of a building. For example, as shown in FIG. 7, when the daylighting device 10 is installed in the window on the east side of the room, not only the morning sun that is inserted into the window from the east, but also sunlight that is inserted from the south in the daytime is efficiently taken indoors, The left and right direction can be brightened.
Moreover, when the lighting device 10 is installed in the window on the west side of the room, not only the daytime light but also the western day can be efficiently taken into the room, and the left and right direction of the window can be brightened.

In the present embodiment, as shown in FIG. 6, the daylighting apparatus 10 is installed so that the fine structure side of the daylighting panel 11 faces the window glass 1003, but the daylighting apparatus 10 is arranged such that the fine structure side of the daylighting panel 11 faces the indoor side. May be installed.

In addition, the installation location of the lighting device 10 is not limited to the upper frame portion 12a1 side. For example, as shown in FIG. 1, fixing holes (second mounting portions) 12B and 12B may be provided in any one of the side frame portions 12a2 perpendicular to the upper frame portion 12a1. Thereby, the direction of the daylighting apparatus 10 can be changed and replaced with respect to the window glass 1003. By installing the daylighting device 10 in such a direction that the extending direction of each daylighting section 14 in the daylighting panel 11 is parallel to the horizontal direction, light incident on the daylighting panel 11 is emitted toward the ceiling 1001 side. Become. Thereby, energy-saving lighting can be realized. Thus, according to the direction of the window of a building and a season, the lighting device 10 can be replaced and the function can be switched. Furthermore, the daylighting apparatus 10 of the present embodiment is easy to handle because it has a simple structure and is easy to manufacture and can be installed at a predetermined location simply by screwing.

Moreover, in the daylighting apparatus 10 of this embodiment, it is also possible to install it below the eyes of a person in the room. For example, as shown in FIG. 8, when the daylighting apparatus 10 is installed in a window below the eyes of a person in the room, the daylighting apparatus 10 is viewed from above the window by a plurality of daylighting sections 14 extending in the vertical direction. The sunlight that is incident on is emitted toward the floor 1002 while being diffused in the horizontal direction. As a result, glare does not occur and people in the room do not feel uncomfortable.

The daylighting apparatus 10 can be installed in addition to the waist-high windows seen in offices and higher floors. For example, as shown in FIGS. 9 and 10, the present invention can be applied to a sliding window or the like in which a window glass often seen in a general home reaches the floor. In this case, for example, the lighting device 10 may be held in an aluminum sash together with the window glass. Thereby, sunlight can be taken in indoors, without impairing the openability of a window. 9 and 10 show a configuration in which the daylighting device 10 is provided on the indoor window glass 1003a in the sliding window, but a configuration in which the daylighting device 10 is also provided on the outdoor window glass 1003b. It is good.

[Second Embodiment]
Next, the configuration of the daylighting device 20 according to the second embodiment of the present invention will be described.
The basic configuration of the daylighting device 20 of the present embodiment described below is substantially the same as that of the first embodiment, but differs in that a light diffusing member is provided. Therefore, in the following description, a configuration different from the previous embodiment will be described in detail, and description of common parts will be omitted. In the drawings used for the description, the same reference numerals are given to the same components as those in FIGS.

(Configuration example 1)
FIG. 11 is a top view illustrating an example of the configuration (separate member) of the daylighting apparatus 20 according to the second embodiment.
FIG. 12A is a perspective view showing a lenticular lens sheet 22A as an example of a light diffusing member in the second embodiment. FIG. 12B is a perspective view showing a microlens array sheet 22B as an example of a light diffusing member in the second embodiment.

As shown in FIG. 11, the daylighting device 20 of the present embodiment is configured such that the daylighting panel 11 and the light diffusion member 22 that diffuses light are supported by the same frame 12. The light diffusing member 22 is disposed on the back surface 11b side opposite to the fine structure surface 11a of the daylighting panel 11. The light diffusing member 22 is disposed at an interval in the light transmission direction with respect to the daylighting panel 11. The light diffusing member 22 is arranged in a state in which the one surface 122a side on which the fine structure is formed is directed to the back surface 11b side of the daylighting panel 11.

The light diffusing member 22 has a function of diffusing incident light isotropically or anisotropically.

When obtaining the function of diffusing light anisotropically, a lenticular lens sheet 22A having a plurality of semicircular lenses 22a having a length in one direction as shown in FIG. It is done.

When obtaining the function of diffusing light isotropically, for example, a microlens array sheet 22B having a plurality of hemispherical lenses 22b as shown in FIG.
The sunlight that has entered the daylighting device 20 is refracted by the daylighting panel 11, diffused by the light diffusion member 22, and then emitted into the room.

(Configuration example 2)
FIG. 13 is a top view showing a daylighting apparatus 20A of Configuration Example 2 in the second embodiment.
The arrangement of the daylighting panel 11 and the light diffusion member 22 in the frame 12 is not limited to the above-described relationship. For example, you may hold | maintain to the flame | frame 12 in the state to which each fine structure surface side was made to oppose. As shown in FIG. 13, the fine structure surface 11 a on which the plurality of daylighting portions 14 of the daylighting panel 11 are formed and the lens surface 122 a of the light diffusing member 22 are held in the frame 12 in a state of facing each other. Good.
The sunlight that has entered the daylighting device 20A is diffused by the light diffusion member 22, refracted by the daylighting panel 11, and emitted into the room.

(Configuration example 3)
14A and 14B are top views showing the daylighting devices 20B and 20C of the configuration example 3 in the second embodiment. FIG. 14A is a view showing a case of a bonding type, and FIG. It is a figure which shows the case where it is a formation type.
In the previous configuration examples 1 and 2, the separate daylighting panel 11 and the light diffusing member 22 are combined. However, the present invention is not limited to the configuration in which the lighting panel 11 and the light diffusing member 22 are separated from each other. Good.

For example, as in the daylighting device 20B shown in FIG. 14A, the daylighting panel 11 and the light diffusing member 22 may be integrated by bonding the back surfaces 11b and 122b to each other and held in this state in the frame 12. .

Further, as in the daylighting device 20C shown in FIG. 14B, the fine structure surface 11a composed of a plurality of daylighting portions 14 is formed on one surface side of one base material 18 having light transmittance, and a plurality of half-surfaces are formed on the other surface side. The lens surface 122a including the circular lens 22a or the plurality of hemispherical lenses 22b may be formed to have both a daylighting function and a light diffusion function.
The sunlight that has entered the daylighting device 20B is refracted by the daylighting panel 11 and then diffused by the light diffusion member 22 and emitted into the room.

In the daylighting devices 20, 20 </ b> A, 20 </ b> B, and 20 </ b> C described above, when the microlens array sheet 22 </ b> B having isotropic light diffusion characteristics is used as the light diffusing member 22, each hemispherical lens 22 b faces the daylighting panel 11. If so, the microlens array sheet 22 </ b> B may be arranged in any direction up, down, left, or right with respect to the daylighting panel 11. Regardless of the incident angle, the light incident on the microlens array sheet 22B is isotropically diffused in each hemispherical lens 22b and is emitted in a wide range in the room, up, down, left, and right. Since the light can be diffused widely by the microlens array sheet 22B, the difference in light and darkness in the room can be reduced and the light can be brightened more evenly.

On the other hand, when a lenticular lens sheet 22A having anisotropic light diffusion characteristics is used as the light diffusing member 22, for example, the effect obtained depends on the orientation of the lenticular lens sheet 22A with respect to the daylighting panel 11.

FIG. 15 is a diagram showing a combination of the daylighting panel 11 on the left side in the figure and the lenticular lens sheet 22A on the right side in the figure, and the extending direction of the daylighting portion 14 in the daylighting panel 11 and the lenticular lens sheet 22A. The case where the extending direction of each hemispherical lens 22b is parallel is shown.

For example, as shown in FIG. 15, the lenticular lens sheet 22A is arranged such that the extending direction of each semicircular lens 22a in the lenticular lens sheet 22A is parallel to the extending direction of each daylighting portion 14 of the daylighting panel 11. In this case, the light incident on the lenticular lens sheet 22A is diffused in the horizontal direction. For this reason, by a synergistic effect with the daylighting panel 11, light is diffused more in the horizontal direction, and a wide range in the left-right direction in the room can be brightened.

FIG. 16 is a diagram showing a combination of the daylighting panel 11 on the left side in the figure and the lenticular lens sheet 22A on the right side in the figure, and the extending direction of the daylighting portion 14 in the daylighting panel 11 and the lenticular lens sheet 22A. The case where the extending direction of each hemispherical lens 22b is orthogonal is shown.

Further, as shown in FIG. 16, the lenticular lens sheet 22A is arranged such that the extending direction of each semicircular lens 22a in the lenticular lens sheet 22A is orthogonal to the extending direction of each daylighting section 14 of the daylighting panel 11. In this case, the light incident on the lenticular lens sheet 22A is diffused in the vertical direction intersecting the extending direction of each semicircular lens 22a. For this reason, the synergistic effect with the daylighting panel 11 allows light to be emitted both in the horizontal direction and in the vertical direction, thereby brightening a wide range in the vertical and horizontal directions in the room.

As described above, when the lenticular lens sheet 22A is used as the light diffusing member 22, the light is collected depending on whether the light diffusing direction in the lenticular lens sheet 22A is the same as or different from the light collecting direction in the daylighting panel 11. By appropriately changing the arrangement posture of the light diffusing member 22 with respect to the panel 11, the obtained optical characteristics can be switched.

As described above, by using the daylighting panel 11 and the light diffusing member 22 in combination, it is possible to alleviate glare due to light having strong directivity that has passed through the daylighting panel 11 and light to not only a desired place but also its surroundings. Can send.

Hereinafter, the configurations of Modifications 1 to 3 of the daylighting panel 11 of the present embodiment will be described.
As long as the light control in the horizontal direction can be performed by the daylighting panel 11, the configurations of the daylighting panel 11 and the light diffusion member 22 are not particularly limited.

(Modification 1)
FIGS. 17A and 17B are schematic views illustrating the configuration of Modification 1 of the daylighting panel 11 according to the second embodiment. FIG. 17A is a front view showing the configuration of the daylighting panel 11, and FIG. 17B is a front view showing the configuration of a lenticular lens sheet 22 A as the light diffusing member 22. In the daylighting panel 11 shown in FIG. 17A, the extending direction of each of the plurality of daylighting units 14 is the vertical direction (Z direction), similarly to the configuration described above.

On the other hand, the lenticular lens sheet 22A shown in FIG. 17B has a plurality of regions in which the extending directions of the semicircular lenses 22a are different. Although the four regions R1a to R1d have different extending directions of the semicircular lens 22a here, the present invention is not limited to this.

The plurality of semicircular lenses 22a in the first diffusion region R1a are parallel to the end side 22c of the lenticular lens sheet 22A and extend in the vertical direction (Z direction).
The plurality of semicircular lenses 22a in the second diffusion region R1b are inclined at a predetermined angle θ with respect to the end side 22c. Here, it is inclined at an angle θ between −45 ° and 0 ° with respect to the end side 22c.
The plurality of semicircular lenses 22a in the third diffusion region R1c extend in a direction (X direction) perpendicular to the end side 22c.
The plurality of semicircular lenses 22a in the fourth diffusion region R1d are inclined at an angle θ between 0 ° and + 45 ° with respect to the end side 22c.

As described above, the light diffusion member 22 having different light diffusion characteristics may be combined for each of the four regions R1a to R1d.

(Modification 2)
18A and 18B are schematic views illustrating a configuration of a second modification of the daylighting panel 11 according to the second embodiment.
FIG. 18A is a front view showing the configuration of the daylighting panel 11, and FIG. 18B is a front view showing the configuration of the light diffusing member 22.
The daylighting panel 11 shown in FIG. 18A has a plurality of regions where the extending directions of the daylighting portions 14, 14A, 14B are different on the first surface 11a of the base 11A. Here, there are three regions R2a, R2b, and R2c with different extending directions of the daylighting units 14, 14A, and 14B, but the number of regions is not limited to this.

The plurality of first daylighting units 14 </ b> A in the first daylighting region R <b> 2 a are inclined at a predetermined angle θ with respect to the end side 11 c of the daylighting panel 11. Here, it inclines at angle (theta) of 0 degree or more +45 degrees or less with respect to the edge 11c which intersects the edge (1st edge) 11e along the horizontal direction of 11 A of base materials.
The plurality of daylighting portions 14 in the second daylighting region R2b are parallel (0 °) to the end side 11c and extend in the vertical direction.
The plurality of second daylighting portions 14B in the third daylighting region R2c are inclined at an angle θ of −45 ° or more and 0 ° or less with respect to the edge 11c.
In this way, the daylighting panel 11 having different light-collecting characteristics for each of the three regions R2a to R2c and the light diffusing member 22 having different light-diffusing properties for each of the four regions R1a to R1d may be combined. .

(Modification 3)
FIG. 19A and FIG. 19B are schematic views illustrating a configuration of a third modification of the daylighting panel 11 in the second embodiment.
FIG. 19A is a front view showing the configuration of the daylighting panel 11, and FIG. 19B is a front view showing the configuration of the light diffusing member 22.
The daylighting panel 11 shown in FIG. 19A has a plurality of daylighting regions R2d and a plurality of transparent regions SP. The plurality of daylighting units 14 in the plurality of daylighting regions R <b> 2 d extend along the edge 11 c of the daylighting panel 11. The daylighting regions R2d are arranged such that the daylighting units 14 are parallel to each other and are spaced apart in a direction intersecting the extending direction of the daylighting unit 14. The transparent region SP exists between the adjacent daylighting panels 11. The daylighting regions R2d and the transparent regions SP are alternately present in the X direction. The interval between the adjacent daylighting regions R2d is smaller than the length in the width direction (X direction) of the daylighting region R2d. The transparent region SP may be made of a light-transmissive resin material, or may be a region where the daylighting unit 14 is thinned out.

The light diffusing member 22 (lenticular lens sheet 22A) shown in FIG. 19B has two light diffusing regions R1e and a transparent region SP existing between them. The transparent region SP may be made of a light-transmitting resin material or may be a thinned region.
When the daylighting panel 11 shown in FIG. 19A and the light diffusion member 22 shown in FIG. 19B are combined, the transparent area SP on the daylighting panel 11 side and the transparent area SP in the light diffusion member 22 The structure does not overlap in the transmission direction.

Thus, in each surface of the daylighting panel 11 and the light diffusing member 22, a region where the daylighting portion 14 and the semicircular lens 22a are not present may be provided.

Thus, the daylighting panel 11 having the transparent region SP where the daylighting unit 14 does not exist and the light diffusion member 22 having the transparent region SP where the semicircular lens 22a does not exist may be combined.

As in the configurations of the first to third modifications described above, each of the lighting panel 11 and the light diffusing member 22 includes a plurality of regions having different light emission characteristics in each surface, so that the light emitted from the lighting device 20A can be reduced. Glare and brightness can be reduced. Moreover, an optimal indoor environment can be provided according to the direction of the window to be installed, the altitude of the sun, and the like.

20 to 23 are diagrams showing another configuration example of the light diffusing member 22 in the second embodiment.
The light diffusing member 22 is not limited to the lenticular lens sheet 22A and the microlens array sheet 22B described above, and other light diffusing members may be employed.

For example, in addition to the above, as the light diffusing member 22 having anisotropic light diffusing characteristics, an anisotropic diffusing sheet having a plurality of prisms 24 on one surface side of a transmissive substrate 23 as shown in FIG. It may be used as Further, as shown in FIGS. 21A and 21B, an anisotropic light diffusion sheet having a so-called pseudo-stripe structure in which a plurality of stripe-shaped protrusions 25 extending in one direction are arranged in a direction intersecting the extending direction is used as a light diffusion member. 22 may be used. Since the plurality of prisms 24 and the plurality of stripe-shaped protrusions 25 extend in one direction in the plane, the incident light is diffused in a direction orthogonal to the extending direction of the prisms 24 and the protrusions 25. be able to.

As shown in FIG. 22, for example, an anisotropic diffusion film in which a large number of needle-like fillers 27 are contained in a resin layer 26 made of a light-transmitting resin may be used as the light diffusion member 22.
Since many fillers 27 are oriented in one direction in the resin layer 26, light incident in the resin layer 26 can be diffused (scattered) in a direction perpendicular to the orientation direction of the filler 27.

Further, as shown in FIG. 23, as a light diffusing member 22 having isotropic light diffusing characteristics, a fine structure layer in which a large number of diffusing beads 29a and the like are dispersed in a binder resin on one side of a light-transmitting substrate 28. A light diffusion sheet or the like in which 29 is bonded may be used.

Further, the lighting device 20 may be configured by combining members having other optical functions in addition to the lighting panel 11 and the light diffusing member 22. Examples of other optical functional members include an ultraviolet cut film, an infrared cut film, and design sheets with various designs.

In the following embodiments, the configuration of a daylighting blind will be described as an embodiment of the daylighting apparatus according to the present invention.

[Third Embodiment]
Next, the structure of the lighting blind 30 of 3rd Embodiment of this invention is demonstrated.
FIG. 24 is a diagram showing an appearance of the daylighting blind 30 of the third embodiment, and is a perspective view seen from the indoor side. The vertical direction of the daylighting blind 30 in FIG. 24 is defined as the Z direction, the horizontal direction is defined as the X direction, and the longitudinal direction is defined as the Y direction. FIG. 25 is a side view of the daylighting blind 30 of the third embodiment.

As shown in FIGS. 24 and 25, the daylighting blind (lighting device) 30 of the present embodiment extends in the horizontal direction (X direction) and is arranged in parallel in the vertical direction (Z direction) at intervals. A lighting slat (lighting member, slat) 31 and a support mechanism (support member) 32 that supports the plurality of daylighting slats 31 so as to be suspended in the vertical direction are mainly configured. The support mechanism 32 supports the plurality of daylighting slats 31 so as to be movable up and down and tilted.

FIG. 26A is a perspective view showing a configuration of the daylighting slat 31. 26B is a cross-sectional view taken along the line BB of FIG. 26A. 26C is a cross-sectional view taken along the line CC of FIG. 26A.
As illustrated in FIG. 26A, the daylighting slat 31 has a bent or curved shape in a cross section perpendicular to the longitudinal direction. FIG. 27 is a perspective view of the daylighting blind 30 as seen from the outdoor side. FIG. 28A is a cross-sectional view showing the lighting blind 30 in a closed state. FIG. 28B is a cross-sectional view showing the lighting blind 30 in an open state.

As shown in FIGS. 26A, 26B, and 26C, the daylighting slat 31 includes a base material 33 having a bent or curved shape in a cross section intersecting the longitudinal direction, and light provided on the first surface 33a of the base material 33. A plurality of daylighting units 34 having transparency and a gap 35 provided between the plurality of daylighting units 34 are provided.

The base material 33 has a first portion 33A and a second portion 33B, and is bent along a central axis (bent portion) L parallel to the longitudinal direction at the boundary between the first portion 33A and the second portion 33B. Yes. The angle θ formed by the first portion 33A and the second portion 33B is appropriately set according to the shape of the plurality of daylighting portions 34 formed on the first surface 33a. In addition, the shape of the base material 33 is not limited to the above-described shape, and may be a configuration bent other than the central axis, for example, a cross-sectional asymmetric shape.

The plurality of daylighting portions 14 are formed on the first surface 33a of the base material 33 as shown in FIGS. 26A, 26B, and 26C. The plurality of daylighting portions 34 are formed across the first portion 33A and the second portion 33B of the base material 33, and an end side (second end side) 33c along the short direction (Y direction) of the base material 33. Extends along. Each of the daylighting portions 34 forms an angle of 0 ° with respect to an end side 33 c that intersects an end side (first end side) 33 e along the longitudinal direction (X direction: horizontal direction) of the base material 33.
That is, the plurality of daylighting units 34 are parallel to the end side 33 c of the base material 33. The plurality of daylighting portions 34 are formed in parallel with the longitudinal direction (X direction) of the base material 33.

In FIG. 26B, the daylighting section 34 has an isosceles triangular shape in cross section, but is not limited to this shape. As described in the previous embodiment, it may be a trapezoidal cross section, a hexagonal cross section, or a multitaper shape, and is not particularly limited.

The support mechanism 32 includes a plurality of ladder cords (not shown) arranged in parallel in the vertical direction, a fixing box 36 that supports the upper end side of each ladder cord, an elevating bar 37 attached to the lower end side of each ladder cord, and elevating An elevating / tilting operation unit 38 for performing the elevating operation of the bar 37 and the tilting operation of each daylighting slat 31 is provided.

The daylighting blind 30 having such a configuration is attached in a state where it is suspended from the upper part of the window, and the fine structure surface side of the plurality of daylighting slats 31 faces the window glass.
In the daylighting blind 30 of this embodiment, as shown in FIG. 27, the daylighting section 34 extends in a direction substantially orthogonal to the longitudinal direction of the daylighting slat 31. Therefore, when sunlight enters the daylighting blind 30, in the first portion 33 </ b> A and the second portion 33 </ b> B of the base material 33 in the daylighting slat 31, the direction intersecting the extending direction of the daylighting unit 34, that is, the longitudinal direction of the daylighting slat 31. It is refracted in the (horizontal direction) and injected into the room.

(Closed state)
As shown in FIG. 28A, in order to close the daylighting blind 30, the lifting / tilting operation unit 38 shown in FIG. 24 is operated so that the first portion 33 </ b> A of the base material 33 approaches the vertical direction. The daylighting slat 31 is raised.

Of the sunlight that has entered the closed daylighting blind 30, the light that has entered the second portion 33 </ b> B of the base material 33 among the daylighting slats 31 is leveled by each of the plurality of daylighting units 34 aligned in the longitudinal direction of the base material 33. Refracted in the direction and diffused in the horizontal direction. The light emitted from the daylighting slat 31 is emitted toward the indoor floor.

On the other hand, the light incident on the first portion 33A of the base material 33 in the daylighting slat 31 is bent and diffused in the horizontal direction by each of the plurality of daylighting portions 34 arranged in the longitudinal direction of the base material 33, and further, The light enters the second portion 33 </ b> B of the base material 33 in another daylighting slat 31 positioned below in the vertical direction. The light emitted from the upper daylighting slats 31 is further bent and diffused in the horizontal direction by each of the plurality of daylighting units 34 in the lower side daylighting slats 31.
Therefore, even when the daylighting blind 30 is closed to ensure indoor privacy, the outside light can be efficiently taken into the room.

(Open state)
As shown in FIG. 28B, in order to open the daylighting blind 30, the elevating / tilting operation unit 38 shown in FIG. 24 is operated to tilt the daylighting slat 31 so that the inclination of the daylighting slat 31 approaches the horizontal direction. Widen the gap between the daylighting slats 31 lined up.

In the case of the daylighting blind 30 in the open state, most of the sunlight enters the first portion 33 </ b> A of the base material 33 in the daylighting slat 31. The light incident on the first portion 33 </ b> A of the base material 33 is refracted in the horizontal direction by each of the plurality of daylighting units 34 arranged in the longitudinal direction of the base material 33 and is diffused in the horizontal direction.

The light emitted from the first portion 33A of the upper daylighting slat 31 is directly emitted toward the indoor floor, but is incident on the second portion 33B of the lower side daylighting slat 31.
The light incident on the second portion 33B of the lower-side daylighting slat 31 is further refracted in the horizontal direction by each of the plurality of daylighting parts 34 arranged in the longitudinal direction of the base material 33, and is emitted into the room in a more diffused state. The

According to the daylighting blind 30 of the present embodiment, sunlight incident from the upper part of the window can be emitted toward the indoor floor while spreading in the left-right direction of the window. Of the plurality of daylighting slats 31, the light incident on the first portion 33 </ b> A of the upper side daylighting slat 31 is doubly diffused by entering the second portion 33 </ b> B of the lower side daylighting slat 31. Of the daylighting slats 31, diffused light emitted from the upper side daylighting slats 31 and direct light transmitted through the window glass are incident on the second portion 33 </ b> B of the base material 33. As a result, the diffusing state of the emitted light is complicated, so that the glare is suppressed and the light can be further spread in the left-right direction in the room.

In the present embodiment, the plurality of daylighting units 34 are configured to have the plurality of daylighting units 34 on the first surface 33a side of the base material 33, but may be provided on the second surface 33b side. .

(Modification of daylighting slats)
FIG. 29 is a perspective view showing a modification of the daylighting slat 39 in the third embodiment.
Each daylighting portion 34 of the daylighting slat 39 shown in FIG. 29 is inclined at a predetermined angle θ with respect to the edge 33 c along the short direction of the base material 33. In this case, it is desirable that the daylighting unit 34 is inclined at an angle θ between −45 ° and + 45 ° with respect to the end side 33c.

<Configuration with light diffusion function>
Next, the structure which has a light-diffusion function with respect to each lighting slat 301 of the lighting blind 30 is demonstrated.
(Configuration example 1 of daylighting slats)
FIG. 30 is a cross-sectional view showing a configuration of a daylighting slat 301 having a light diffusion function.
As in the daylighting slat 301 shown in FIG. 30, the light diffusion sheet 301 </ b> A is provided on the second surface 33 b side of the base material 33 opposite to the first surface 33 a provided with the plurality of daylighting portions 34. May be. The light diffusing sheet 301A only needs to have a function capable of diffusing light isotropically or anisotropically, and the configuration thereof is particularly a bonded type or an integrally formed type as shown in FIGS. 14A and 14B. It doesn't matter. Whether the member having isotropic diffusion characteristics or the member having anisotropic diffusion characteristics is used as the light diffusion sheet 301A is appropriately set according to the direction of the window where the daylighting blind 30 is installed, the solar altitude, or the like. Is done.

The light incident on the daylighting slats 301 is bent in the horizontal direction in the plurality of daylighting portions 34, and then isotropically or anisotropically diffused and emitted in the light diffusion sheet 301A.

(Configuration example 2 of daylighting slats)
FIG. 31 is a cross-sectional view showing a configuration of a daylighting slat 302 having a light diffusion function.
As in the daylighting slat 302 shown in FIG. 31, a configuration in which a daylighting function and a light diffusion function are provided to a part of the base material 33 may be adopted. In the daylighting slat 302, the first portion 33A of the base material 33 is provided with a daylighting function and a light diffusion function, and the second portion 33B has a light transmission function. The second portion 33B is not provided with a daylighting function and a light diffusion function, and has only a light transmission function.

Specifically, a light diffusion sheet 302A is provided on the first surface 33a side of the first portion 33A of the base material 33. The plurality of daylighting units 34 are provided on the second surface 33b side of the first portion 33A. As for the 2nd part 33B of the base material 33, the 1st surface 33a and the 2nd surface 33b are each exposed.

Among the daylighting slats 302, light incident on the second portion 33B of the base material 33 is transmitted through the second portion 33B while maintaining the incident angle. The light incident on the first portion 33A of the base material 33 is diffused isotropically or anisotropically in the light diffusing sheet 302A, and then refracted in the horizontal direction and emitted from the plurality of daylighting sections 34.

(Configuration example 3 of daylighting slats)
FIG. 32 is a cross-sectional view showing a configuration of a daylighting slat 303 having a light diffusion function.
As in the daylighting slat 303 shown in FIG. 32, a daylighting function and a light diffusion function may be provided in the short direction of the base material 33.
The daylighting slat 303 has a plurality of daylighting portions 34 on the first portion 33A side of the first surface 33a of the base material 33, and has a light diffusion sheet 303A on the second portion 33B side.

Among such daylighting slats 303, light incident on the second portion 33B side of the base material 33 is isotropically or anisotropically diffused in the light diffusion sheet 303A and then passes through the second portion 33B. The light incident on the first portion 33 </ b> A side of the base material 33 is refracted in the horizontal direction in the plurality of daylighting portions 34 and then passes through the first portion 33 </ b> A.

(Configuration example 4 of daylighting slats)
FIG. 33 is a cross-sectional view showing a configuration of a daylighting slat 304 having a light diffusion function.
Like the daylighting slat 304 shown in FIG. 33, a configuration in which a daylighting function and a light diffusion function are added to a part of the daylighting slat 304 may be adopted.

The daylighting slat 304 includes a cover member 4 having a bent or curved shape in a cross section that intersects the longitudinal direction, a daylighting sheet 5 having a plurality of daylighting portions 34 on one surface side, and a light diffusion sheet 6. ing. The daylighting sheet 5 is provided with a plurality of daylighting sections 34 extending in the short-side direction. The configuration of the light diffusion sheet 6 is not particularly limited as long as it has a light diffusion function.

A holding groove 7 for holding the daylighting sheet 5 and the light diffusion sheet 6 is formed in the first portion 4A of the cover member 4. The second portion 4B has a tapered shape toward the tip side (one side in the short direction). The daylighting slat 304 is configured by incorporating the daylighting sheet 5 and the light diffusion sheet 6 into the cover member 4 as described above. The cover member 4 protects the daylighting sheet 5 and the light diffusion sheet 6 and also has a dustproof function for the fine structure surfaces of the daylighting sheet 5 and the light diffusion sheet 6.

Sunlight incident on the daylighting slats 304 passes through the first portion 4A of the cover member 4 and then continuously passes through the daylighting sheet 5 and the light diffusion sheet 6 and is emitted in a diffused state.

(Structural example 5 of daylighting slats)
FIG. 34 is a cross-sectional view showing a configuration of a daylighting slat 305 having a light diffusion function.
Like the daylighting slat 305 shown in FIG. 34, the cross section that intersects the longitudinal direction may not be bent or curved.
The base material 8 has a planar plate shape having a length in one direction, and a cross section intersecting with the longitudinal direction forms a rectangular shape. The base material 8 is provided with the daylighting sheet 5 on the first surface 8a side, and the light diffusion sheet 6 is provided on the second surface 8b side.

The sunlight incident on the daylighting slats 305 is first refracted in the horizontal direction in the daylighting sheet 5, then transmitted through the base material 8, and isotropically or anisotropically diffused in the light diffusion sheet 6. It is injected.

In the configurations shown in the modifications 2 to 6 described above, it is set as appropriate which of the first surface and the second surface of the base material is provided with the daylighting function portion and the light diffusion portion. Regardless of the configuration in which the daylighting function portion is provided on the outdoor side and the light diffusion function portion is provided on the indoor side of the daylighting slat, the light diffusion function portion may be provided on the outdoor side and the light diffusion function portion may be provided on the indoor side. Moreover, there is no restriction | limiting in particular about whether each fine structure surface side of a daylighting functional part and a light-diffusion functional part is arrange | positioned toward the outdoor side or indoor side, and it sets suitably.

[Fourth Embodiment]
Next, the structure of the daylighting blind 40 of 4th Embodiment of this invention is demonstrated.
FIG. 35 is a diagram showing a part of the appearance of the daylighting blind 40 of the fourth embodiment, and is a perspective view seen from the outdoor side. FIG. 36 is a perspective view showing the configuration of the daylighting slat 41 of the fourth embodiment. FIG. 37 is a side view showing a daylighting state in the daylighting blind 40 of the fourth embodiment.

As shown in FIG. 35, the daylighting blind (lighting device) 40 of the present embodiment includes daylighting slats (lighting members, slats) 41 arranged in parallel in the vertical direction at intervals. The daylighting slat 41 of the present embodiment has two daylighting functions (left / right diffusion function / upper / lower diffusion function).

As shown in FIG. 36, the daylighting slat 41 includes a base material 33, and a plurality of first daylighting units 34A and a plurality of second daylighting units 34B provided on the first surface 33a side of the base material 33. It is configured.
The plurality of first daylighting units 34 </ b> A are provided only in the first portion 33 </ b> A of the base material 33. 34 A of 1st daylighting parts are extended along the edge 33c of the transversal direction of 1st part 33A, and are provided along with the longitudinal direction of 1st part 33A (base material 33).
The plurality of second daylighting units 34 </ b> B are provided only in the second portion 33 </ b> B of the base material 33. The second daylighting section 34B extends along the longitudinal edge 33d of the second portion 33B (base material 33), and is provided in parallel with the lateral direction of the second portion 33B.

In the daylighting blind 40 having such a configuration, as shown in FIG. 37, the emission direction of the light collected by the light incident on the first part 33A or the second part 33B of the daylighting slat 41 is different.

As shown in FIG. 37, in the daylighting slat 41, light incident on the first portion 33A of the base material 33 is refracted in the horizontal direction by the plurality of first daylighting portions 34A and emitted toward the indoor floor. .

Depending on the altitude of sunlight, the light incident on the first portion 33A of the upper daylighting slat 41 is diffused in the horizontal direction in the first daylighting portion 34A, and then is incident on the second portion 33B of the lower side daylighting slat 41. Incident. The light incident on the second portion 33B of the lower daylighting slat 41 is refracted upward by the plurality of second daylighting portions 34B extending in the longitudinal direction of the base material 33, and is emitted toward the indoor ceiling. .

Moreover, sunlight may be directly incident on the second daylighting portion 34B of each daylighting slat 41 and emitted upward.

According to the daylighting blind 40 of this embodiment, a single daylighting slat 41 is provided with a function of diffusing light in the horizontal direction and a function of refracting light in the vertical direction. In addition, the light can be spread toward the ceiling of the room. Thereby, it can substitute for illumination and the whole room can be brightened uniformly.

[Fifth Embodiment]
Next, the structure of the daylighting blind 50 of 5th Embodiment of this invention is demonstrated.
FIG. 38 is a view showing a part of the appearance of the daylighting blind 50 of the fifth embodiment, and is a perspective view seen from the outdoor side. FIG. 39 is a side view showing a daylighting state in the daylighting blind 50 of the fifth embodiment.

38. As shown in FIG. 38, the daylighting blind (daylighting device) 50 of the present embodiment includes daylighting slats (lighting members, slats) 51 arranged in parallel in the vertical direction at intervals. The daylighting slat 51 of this embodiment has two optical functions (lighting function and reflection function).

38. As shown in FIG. 38, the daylighting slat 51 includes a plurality of daylighting portions 34 in the first portion 33A of the base material 33 and a reflecting surface 52 in the second portion 33B.

The plurality of daylighting units 34 are provided in the first portion 33 </ b> A of the base material 33. The plurality of daylighting portions 34 are provided in parallel with the longitudinal direction of the base material 33 while extending to the side 33 c in the short direction of the base material 33.

The reflective surface 52 is formed using, for example, a reflective sheet provided so as to cover the first surface 33a side of the second portion 33B of the base material 33. The reflection sheet is made of a highly reflective material such as metal. Or you may form the reflective surface 52 by coloring the 1st surface 33a side of the 2nd part 33B white. Moreover, you may make it obtain the reflective surface 52 by forming the 2nd part 33B among the base materials 33 with a metal material.

In such a daylight blind 50, as shown in FIG. 39, the light incident on the first portion 33A of the base material 33 in the daylighting slat 51 is refracted in the horizontal direction by the plurality of daylighting portions 34, and then the lower order. The light is incident on the side daylighting slat 51. When light emitted from the upper daylighting slat 51 enters the second portion 33B of the lower side daylighting slat 51, the light is reflected upward by the reflecting surface 52. The reflected light travels toward the ceiling of the room and can illuminate the ceiling brightly.

The reflective surface 52 is not limited to having high reflectivity. For example, it may have a transflective function that reflects part of the light and transmits the remaining light.

Further, it is not necessary that all of the daylighting slats 51 constituting the daylighting blind 50 have high reflectivity. For example, in the daylighting blind 50, the reflecting surfaces 52 of the plurality of daylighting slats 51 positioned on the upper side have high reflectivity, and the reflecting surfaces 52 of the plurality of daylighting slats 51 positioned on the lower side are arranged on the upper side. It is good also as what has low reflectivity compared with the slat 51. FIG.

Thereby, while the effect which illuminates a ceiling brightly with the light reflected in the lighting slat 51 located above the eyes of the person who is indoors is obtained, and in the lighting slats 51 located below the eyes of the person who is indoors It is possible to prevent the reflected light from entering the human eye and feeling dazzling.

In the present embodiment, the second portion 33B of the base material 33 in the daylighting slat 51 is configured to have high reflectivity, but other optical functions may be imparted to the second portion 33B. For example, the second portion 33B may have a light diffusion function, a light shielding function, or a light transmission function.

(Modification)
FIG. 40 is a perspective view showing a daylighting blind 55 as a modification of the fifth embodiment.
Like the daylighting blind 55 shown in FIG. 40, the optical function slats 56 may be partially mixed.
The lighting blind 55 has a configuration in which lighting areas 55A and 55A exist on the upper and lower sides in the vertical direction, and an optical function area 55B exists between the pair of lighting areas 55A and 55A. .

The daylighting area 55 </ b> A includes a plurality of daylighting slats 51.
The optical function area 55 </ b> B includes a plurality of optical function slats 56. As the optical function slat 56, for example, a slat having a light shielding property, a light diffusing property, or a dimming property is used. The light-shielding slats may be those generally used as blind slats, and examples thereof include metal materials such as aluminum, wood, and resin. Moreover, what gave the surface coating etc. can be mentioned. As the slat having light diffusibility, a slat having a configuration in which light is diffused isotropically or anisotropically can be used. In addition, the slat having dimming characteristics is colored with an arbitrary color, for example, but a slat that transmits light is preferable.

The position of the optical function area 55B in the daylighting blind 55 is not particularly limited. For example, it is preferable to set the position of the optical function area 55B in the daylighting blind 55 in accordance with the height of the line of sight of a person in the room.
Thereby, a glare does not enter excessively in the eyes | visual_axis of the person who exists indoors, and a comfortable indoor environment can be obtained. Furthermore, there is no worry of peeping into the room from the outside, and the privacy of the person in the room is ensured.

The optical functional slat 56 may be any optical functional slat as long as the entire slat has a light shielding property, light diffusing property, or dimming property. It may be.

Further, the daylighting blind 50 may be configured to include each daylighting slat of each of the third to fifth embodiments described above. Further, the arrangement position of the daylighting area 55A and the optical function area 55B in the daylighting blind 55, the size of each area, and the like are not particularly limited.

[Sixth Embodiment]
Next, the structure of the lighting blind 60 of 6th Embodiment of this invention is demonstrated.
FIG. 41 is a perspective view showing the appearance of the daylighting blind 60 of the sixth embodiment.
As shown in FIG. 41, the daylighting blind 60 of this embodiment is a vertical blind.
Compared to the daylighting blinds of the third to fifth embodiments described above, a difference is that a plurality of daylighting slats are suspended with their longitudinal directions parallel to the vertical direction.

A lighting blind (lighting device) 60 is located above the window frame and extends in the horizontal direction to a rail portion 61, and a plurality of strip-shaped daylighting slats (lighting members, slats) 62 suspended from the rail portion 61. It has.

The rail part 61 has a tilting mechanism (not shown) inside. The tilting mechanism is a mechanism that tilts the daylighting slat 62 in the lateral direction.

The daylighting slat 62 has a plurality of optical regions divided in the longitudinal direction. In the present embodiment, the daylighting slat 62 is divided into a daylighting area 62A and a transmission area 62B.
The daylighting area 62 </ b> A is located on the upper side in the vertical direction from the middle in the longitudinal direction of the daylighting slat 62. The daylighting area 62A emits sunlight incident from the outside in the left-right direction in the room.
The transmission region 62B is located on the lower side in the vertical direction from the middle in the longitudinal direction of the daylighting slat 62. The transmission region 62B transmits sunlight incident from the outside and emits it toward the floor in the room.

(Daylighting slats)
FIG. 42A is a perspective view showing the configuration of the daylighting slat 62 of the daylighting blind 60 according to the sixth embodiment. FIG. 42B is a perspective view showing a modification of the daylighting slat 62 of the sixth embodiment.
The daylighting slat 62 includes a plate-like light-transmitting base material 63 having a length in one direction, and a plurality of daylighting units 42 provided in the daylighting region 62A on the first surface 63a side of the base material 63. Have.
The plurality of daylighting units 42 are provided in the daylighting region 62A on the first surface 62a. As illustrated in FIG. 42A, the lighting units 42 extend along the longitudinal direction of the base material 63 and are provided in a plurality in the short-side direction of the base material 63. Alternatively, as shown in FIG. 42B, a predetermined angle θ with respect to an end side (second end side) 63c that intersects an end side (first end side) 63e along the short direction (horizontal direction) of the substrate 63. It may be inclined at. In this case, the inclination angle of the daylighting section 42 with respect to the end side 63c is set between −45 ° and + 45 °.

Nothing is provided in the transmission region 62B on the first surface 63a side of the base 63, and the first surface 63a is exposed. Here, the daylighting area 62A and the transmission area 62B of the daylighting slat 62 may be made of different base materials. The daylighting slat 62 may be configured by pasting together a base material having a plurality of daylighting portions 42 on one surface side and a longitudinal direction of the flat plate-like base material.

The daylighting slat 62 configured as described above has a rotation shaft 64 at the center of the upper side 62c on one end side in the longitudinal direction. Each daylighting slat 62 is connected to the above-described rail portion 61 via a rotating shaft 64. The plurality of daylighting slats 62 are tilted about the rotation shaft 64 by a tilting mechanism provided in the rail portion 61. Thereby, each daylighting slat 62 tilts all at once so that the first surface 63a side of the substrate 63 follows the movement of the sun and faces the direction of the sun. The plurality of daylighting slats 62 are deployed or housed by moving along the rail portion 61.

FIG. 43A and FIG. 43B are views of the indoor state in which the daylighting blind 60 according to the sixth embodiment is installed on the window on the east side of the room as viewed from the ceiling side. 43A shows a half-open state, and FIG. 43B shows a fully-closed state.

As shown in FIG. 43A, by making the daylighting blind 60 installed in the east window half open, the sunlight incident from the southeast or south is refracted in the daylighting region 62A of each daylighting slat 62, and the indoor north side It is injected towards. Since the refracted light is emitted from each of the plurality of daylighting slats 62 arranged in the north-south direction, the light toward the north side of the room spreads in the horizontal direction, and the north side of the room can be illuminated brightly. Further, in the daylighting blind 60, the light incident on the transmission area 62B of each daylighting slat 62 is emitted as it is toward the indoor floor. Thereby, the floor surface in the vicinity of the window can be illuminated brightly.

As shown in FIG. 43B, by making the daylighting blind 60 installed in the east window fully closed, the sunlight incident from the southeast or the south is refracted in the daylighting region 62A of each daylighting slat 62, It is injected towards the west side. Each of the plurality of daylighting slats 62 extends toward the west side of the room but extends in the horizontal direction, so that the west side of the room can be illuminated brightly. Even in the fully closed state, the light incident on the transmission region 62B of the daylighting slat 62 is emitted as it is toward the indoor floor and can brightly illuminate the floor near the window.

When the daylighting blind 60 is installed on the window on the east side of the room, the inclination angle of each daylighting slat 62 is changed so that the light is emitted toward the brightest part on the north side, south side, and west side of the room.

Here, an example in which the daylighting blind 60 of the present embodiment is installed in a window on the east side of the room has been described, but it may be installed in a window in another direction.

According to the vertical daylighting blind 60 of this embodiment, it is possible to control the emission angle of the light collected into the room by the tilting of the daylighting slat 62 (rotation in the XY plane). Thereby, light can be efficiently emitted toward a place where it is desired to brighten indoors.

Instead of the light transmission function (transmission region 62B) of the daylighting slat 62, a light diffusion function, a light shielding function, or other optical functions may be provided.
Further, the daylighting slat 62 of the present embodiment has a configuration in which the longitudinal direction is divided into the daylighting area 62A and the transmission area 62B, but the number of the divided areas is not limited to two. A daylighting area 62 </ b> A may be provided on the entire surface of the daylighting slat 62. The lighting slat 62 may be further provided with another optical function area. That is, the daylighting slat 62 may be divided into a plurality of parts in the longitudinal direction, and different optical functions may be given to the respective regions.

[Seventh Embodiment]
Next, the configuration of the daylighting roll screen 70 according to the seventh embodiment of the present invention will be described.
FIG. 44 is a perspective view showing the appearance of the daylighting roll screen 70 of the seventh embodiment.
As shown in FIG. 44, a daylighting roll screen (daylighting device) 70 includes a daylighting screen (daylighting member, slat) 71, a winding mechanism (supporting member) 72 that supports the daylighting screen 71 so that it can be wound and fed out, and It has.

The daylighting screen 71 includes a base material 73 having optical transparency and a plurality of daylighting portions 78 formed on the first surface 73a side of the base material 73. The plurality of daylighting sections 78 extend in the vertical direction with respect to an end side (second end side) 73c that intersects an end side (first end side) 73e along the horizontal direction of the base material 73 and A plurality are provided side by side in the width direction. The plurality of daylighting sections 78 extend along the winding direction of the daylighting screen 71.

The winding mechanism 72 is attached to the winding core 74 attached along the upper end portion of the daylighting screen 71, the elevating pipe 75 attached along the lower end portion of the daylighting screen 71, and the lower end center of the daylighting screen 71. A tension cord 76.

In the winding mechanism 72, as a pull cord type, it is possible to fix the daylighting screen 71 at a position where the daylighting screen 71 is pulled downward, or to release the fixing and store it upward.
In order to release the fixing of the daylighting screen 71, the daylighting screen 71 can be released by pulling the pull cord 76 from the pulled out position, and the daylighting screen 71 can be automatically wound around the winding core 74. it can.

The daylighting roll screen 70 having such a configuration is used in a state where the winding mechanism 72 is attached to the upper part of the window glass. In this embodiment, although it sets to the winding mechanism 72 so that the some lighting part 78 of the lighting screen 71 may face the indoor side opposite to a window glass, it is not restricted to this. The daylighting screen 71 may be set on the winding mechanism 72 so that the plurality of daylighting units 78 face the window glass 1003.
In the daylighting roll screen 70 of the present embodiment, the height of the daylighting area can be adjusted by the amount of the daylighting screen 71 drawn.

45A and 45B are cross-sectional views showing a state of using the daylighting roll screen 70 in the seventh embodiment, in which FIG. 45A shows a fully developed state and FIG. 45B shows a partially developed state.
As shown in FIG. 45A, in a state where all the daylighting screens 71 are pulled out and most of the window glass 1003 is covered, a plurality of light beams that enter the room through the window glass 1003 extend in the vertical direction of the daylighting screen 71. In each of the daylighting sections 78, the light is refracted in the horizontal direction and is emitted toward the indoor floor 1002 in a state of being expanded in the horizontal direction in the indoor space.
As a result, the daylighting screen 71 can make the room a bright environment while ensuring indoor privacy.

As shown in FIG. 45B, in a state in which the daylighting screen 71 is partially pulled out, the light incident on the upper side of the window glass 1003 can be spread in the left-right direction in the room, and the window glass 1003 not covered by the daylighting screen 71 is displayed. The outdoor view can be secured.

Thus, according to the configuration of the daylighting roll screen 70 of the present embodiment, the daylighting state and the view state can be appropriately switched.

(Modification)
46A and 46B are diagrams showing a state of using the configuration of the daylighting roll screen 77 which is a modified example of the seventh embodiment, in which FIG. 46A shows a fully expanded state, and FIG. 46B shows a partially expanded state. .
The daylighting roll screen 77 shown in FIGS. 46A and 46B is configured to be installed at the lower part of the window and to pull out the daylighting screen 71 upward. Is different.
Also in this configuration, it is possible to fix the daylighting screen 71 at the position where it is pulled upward by the pull cord mechanism of the winding mechanism 72, or to release the fixing and store it downward.

The daylighting roll screen 77 shown in FIGS. 46A and 46B has a holding mechanism (not shown) that holds the daylighting screen 71 in a state of being lifted upward from the winding mechanism 72 installed at the lower part of the window.

Although there is no limitation in particular as a holding mechanism, what is necessary is just the structure which can hold the lighting screen 71 or the raising / lowering pipe 75 so that raising / lowering is possible. For example, it is good also as a structure which hangs the lighting screen 71 so that raising / lowering is possible from a ceiling side using a raising / lowering cord. Or it is good also as a structure which hold | maintains the width direction both sides of the lighting screen 71 with a rail. In this case, each of the pair of rails provided on both sides in the width direction of the daylighting screen 71 is formed with a recess for supporting both ends of the lifting pipe 75 of the daylighting screen 71 fixed at an arbitrary position by a pull cord mechanism. May be. By inserting both end sides of the elevating pipe 75 into the recesses of the rails, the planar posture of the fixed daylighting screen 71 can be maintained.

According to the daylighting roll screen 77 configured as described above, the upper side of the window glass 1003 can be opened by pulling up the daylighting screen 71 so as to cover the lower side of the window glass 1003. Thereby, it is possible to ensure outdoor viewability while ensuring indoor privacy. In addition, by opening the upper side of the window, a feeling of opening can be obtained, and when the window glass 1003 is opened, a natural wind can be taken into the room.

As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

For example, the position, size, etc. of the window for installing the daylighting device in each embodiment described above are not particularly limited.
As described above, the daylighting device may be installed in a window to which the window glass is attached in a vertical posture, or the daylighting device may be installed in a skylight or an inclined window. Even when the lighting device is installed in such a window, the lighting device is installed so that the light incident surface of the lighting device is parallel to the inner surface of the window glass.

One embodiment of the present invention can be applied to a daylighting apparatus that needs to obtain a daylighting effect regardless of the direction of the window, and that needs to be easily removed and switched between optical functions.

10, 20, 20A, 20B, 20C ... daylighting device, 30, 40, 50, 60 ... daylighting blind (lighting device), 70 ... daylighting roll screen (lighting device), 4A, 33A ... first part, 4B, 33B ... 2nd part, 5 ... daylighting sheet, 8, 11A, 18, 28, 33, 63, 73 ... base material, 8a, 11a, 33a, 62a, 63a, 73a ... first surface, 11 ... daylighting panel (lighting member) , 11e, 33e, 63e, 73e ... end side (first end side), 11c, 33c, 63c, 73c ... end side (second end side), 12 ... frame (support member), 14, 34, 42, 78 ... Daylighting part, 14a ... Side surface (reflection surface), 14A ... First daylighting part, 14B ... Second daylighting part, 15, 35 ... Air gap part, 22 ... Light diffusing member, 31, 39, 41, 51, 62 , 301, 302, 303, 304, 3 DESCRIPTION OF SYMBOLS 5 ... Daylighting slat, 32 ... Support mechanism (support member), 34A ... 1st daylighting part, 52 ... Reflecting surface, 71 ... Daylighting screen, 72 ... Winding mechanism (support member), L ... Center axis (bending part), 55A, 62A, R2a, R2b, R2c, R2d ... daylighting area, R1a, R1b, R1c, R1d, R1e ... light diffusion area

Claims (13)

1. A base material having light transmittance at least in part, a plurality of first light-transmitting portions having light transmittance provided on the first surface of the base material, and a gap provided between the plurality of daylighting portions A daylighting member having a portion,
   A support member for supporting the daylighting member,
   A part of the side surface of the daylighting part in contact with the gap functions as a reflecting surface that reflects the light incident on the daylighting part,
   The daylighting unit has a characteristic of dispersing and emitting light reflected by the reflecting surface in a direction intersecting the extending direction of the daylighting unit,
   The plurality of daylighting portions extend in the vertical direction and extend at an angle of −45 ° or more and + 45 ° or less with respect to the second end side intersecting the first end side along the horizontal direction of the base material. The lighting device.
2. The daylighting apparatus according to claim 1, wherein the plurality of daylighting units are parallel to the second end side.
3. The daylighting device according to claim 1 or 2, further comprising a light diffusing member that is provided on either the light incident side or the light emission side of the daylighting member and diffuses the light isotropically or anisotropically.
4. The daylighting member is
   A first daylighting region having a plurality of first daylighting portions extending at a first angle with respect to the second end side of the base material; and a second daylighting region with respect to the second end side of the base material. The daylighting device according to any one of claims 1 to 3, further comprising at least a second daylighting area having a plurality of second daylighting parts extending at an angle.
5. The support member is a frame-like frame that supports an outer peripheral edge of the daylighting member;
   A first mounting portion provided at a part of the outer peripheral edge of the daylighting member, and a second mounting portion provided at a position rotated by a predetermined angle with respect to the first mounting portion in the outer peripheral edge. The daylighting device according to any one of claims 1 to 4, further comprising:
6. A plurality of slats having the substrate extending in one direction;
   The support member that connects the plurality of slats with the longitudinal direction of the slats oriented in the horizontal direction and supports the plurality of slats in a vertically suspended manner; and
   The daylighting device according to any one of claims 1 to 3, wherein the second end side of the base material is along an end side in a short direction of the slat.
7. The slat has a bent or curved shape in a cross section perpendicular to the longitudinal direction of the daylighting member,
   The daylighting apparatus according to claim 6, wherein the plurality of daylighting units are provided on at least one side of a first part and a second part adjacent to each other via a bent part of the slats.
8. The daylighting device according to claim 6 or 7, wherein the plurality of daylighting units extend from the first part to the second part.
9. The slat has a plurality of first daylighting portions in the first portion, and a plurality of second daylighting portions extending in a direction intersecting with the extending direction of the first daylighting portion in the second portion. The daylighting device according to claim 6 or 7, comprising:
10. The daylighting device according to claim 6 or 7, wherein the slat has the plurality of daylighting units in the first part and a reflection surface in the second part.
11. A plurality of slats having the substrate extending in one direction;
    The support member that supports the longitudinal direction of the plurality of slats in a vertically suspended manner, and
    The daylighting device according to any one of claims 1 to 3, wherein the second end side of the base material is along an end side in a short direction of the slat.
12. 12. The daylighting apparatus according to claim 11, wherein the slat is divided into a plurality of parts in the longitudinal direction, and different optical functions are given to the divided areas.
13. A daylighting screen having the substrate and the plurality of first daylighting units;
    A winding mechanism that supports the daylighting screen so as to be wound up and out in the vertical direction; and
    The plurality of daylighting portions extend at an angle between −45 ° and + 45 ° with respect to an end along the winding and feeding direction of the daylighting screen. The lighting device according to one item.

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