JPWO2019054410A1 - Daylighter - Google Patents

Abstract

The daylighting device of one aspect of the present invention supports a plurality of louvers, each of which extends in the vertical direction and is arranged side by side in the horizontal direction, and a plurality of louvers suspended on the indoor side of the window surface. A support member for moving a plurality of louvers in the horizontal direction is provided. Each of the plurality of louvers has a first surface provided with a lighting portion including a plurality of prism structures, and each of the plurality of louvers has a reference posture in which the first surface is located substantially parallel to the window surface. It is possible to rotate in two different rotation directions around a rotation axis extending in the vertical direction.

Description

One aspect of the present invention relates to a daylighting device.
The present application claims priority based on Japanese Patent Application No. 2017-177830 filed in Japan on September 15, 2017, the contents of which are incorporated herein by reference.

In the field of vertical blinds, vertical blinds have been proposed in which the slats are rotated according to the movement of the sun for the purpose of taking in the maximum amount of external light while blocking direct light. For example, Patent Document 1 below discloses a "vertical blind slat angle adjusting device" provided with interference blocking means that do not interfere with the rotation of adjacent slats.

Japanese Patent No. 5193847

In the field of daylighting devices, a daylighting device having a configuration in which a vertical louver for daylighting is rotated according to the movement of the sun is being studied for the purpose of efficiently taking in sunlight into a room. However, if the rotation mechanism of Patent Document 1 is applied to a daylighting device, there are problems such as a complicated rotation mechanism being required and a decrease in the daylighting function because some louvers do not face the direction of the sun. ..

One aspect of the present invention has been made to solve the above-mentioned problems, and one of the objects of the present invention is to provide a daylighting device capable of effectively following the movement of the sun with individual louvers. To do.

In order to achieve the above object, the daylighting apparatus of one aspect of the present invention includes a plurality of louvers, each extending in the vertical direction and arranged side by side in the horizontal direction, and the plurality of louvers on the indoor side of the window surface. A support member that supports the louvers in a suspended form and moves the plurality of louvers in the horizontal direction, and each of the plurality of louvers is provided with a lighting unit including a plurality of prism structures. Each of the plurality of louvers has one surface, and each of the plurality of louvers has two different rotation directions centered on a rotation axis extending in the vertical direction from a reference posture in which the first surface is located substantially parallel to the window surface. It is said to be rotatable.

In the daylighting apparatus of one aspect of the present invention, each of the plurality of louvers may be rotatable according to the direction in which the sun moves.

The daylighting device according to one aspect of the present invention includes a rotation drive mechanism for rotationally driving each of the plurality of louvers, and the rotational drive so as to automatically change the rotation angle of the louvers according to the direction of the sun. A control unit that controls the mechanism may be further provided.

In the daylighting apparatus of one aspect of the present invention, the louver may further include a solar cell element.

In the daylighting apparatus of one aspect of the present invention, the pitch between the adjacent louvers may be the same as the width of the louvers, or may be wider than the width of the louvers.

In the daylighting apparatus of one aspect of the present invention, the rotation axes of the adjacent louvers may be arranged at different distances from the window surface.

The daylighting device of one aspect of the present invention may further include a dimming member that reduces the amount of light traveling straight through the gap between adjacent louvers.

In the daylighting apparatus of one aspect of the present invention, the louver is composed of a daylighting film having a first surface provided with a daylighting portion including the plurality of prism structures, and a material having visible light transmission. It may be provided with a storage unit for storing the daylighting film.

In the daylighting apparatus of one aspect of the present invention, the louver may further include a functional member that produces a predetermined effect on the incident light.

In the daylighting apparatus of one aspect of the present invention, the functional member may be detachable from the louver.

In the daylighting apparatus of one aspect of the present invention, the functional member may be a light-shielding member.

In the daylighting apparatus of one aspect of the present invention, the functional member may be a light diffusing member.

According to one aspect of the present invention, it is possible to realize a daylighting device in which individual louvers can effectively follow the movement of the sun.

It is a front view of the daylighting apparatus of 1st Embodiment. It is sectional drawing of the daylighting apparatus along line II-II of FIG. It is a perspective view of a daylighting apparatus. It is a perspective view of a carrier and a spacer link. It is a top view of the head box. It is an exploded perspective view of the rotation mechanism of a carrier. It is a perspective view of the carrier for demonstrating the rotation operation of the hook in this embodiment. It is a perspective view of the carrier for demonstrating the rotation operation of the hook in this embodiment. It is a perspective view of the carrier for demonstrating the rotation operation of the hook in this embodiment. It is a perspective view of the carrier for demonstrating the rotation operation of a general hook. It is a perspective view of the carrier for demonstrating the rotation operation of a general hook. It is a perspective view of the carrier for demonstrating the rotation operation of a general hook. It is a perspective view of a direction change joint. It is a side view of the carrier with the direction change joint attached. It is a figure for demonstrating the operation of the louver in the daylighting apparatus of this embodiment. It is a figure for demonstrating operation of a louver in a daylighting apparatus of a comparative example. It is a front view of the daylighting apparatus of 2nd Embodiment. It is a perspective view of a daylighting apparatus. It is sectional drawing of the daylighting apparatus along the XV-XV line of FIG. It is a perspective view of a carrier. It is a bottom view of a carrier. It is sectional drawing of the daylighting apparatus of the 1st modification. It is sectional drawing of the daylighting apparatus of the 2nd modification. It is a front view of the daylighting apparatus of 3rd Embodiment. It is a perspective view of a carrier in a state where a louver is stored. It is a perspective view of the carrier with the louver open. It is a front view of the daylighting apparatus of the 1st modification. It is a perspective view of the louver in the daylighting apparatus of 4th Embodiment. It is sectional drawing of the louver of the 1st modification. It is sectional drawing of the louver of the 2nd modification. It is a front view of the louver of the 3rd modification. It is a side view of the lighting part of the 1st modification. It is a side view of the lighting part of the 2nd modification. It is a side view of the lighting part of the 3rd modification. It is a front view of the lighting part of the 4th modification. It is a front view of the lighting part of the 5th modification. It is a perspective view of the lighting part of the 6th modification. It is sectional drawing of the daylighting unit of the 1st modification. It is sectional drawing of the daylighting unit of the 2nd modification. It is a perspective view of the daylighting unit of the 3rd modification. It is sectional drawing of the light diffusing member of the 1st modification. It is a perspective view of the light diffusing member of the 2nd modification. It is sectional drawing of the light diffusing member of the 3rd modification. It is sectional drawing of the light diffusing member of the 4th modification. It is a perspective view of the light diffusing member of the 4th modification. It is a front view of the louver in the daylighting apparatus of 5th Embodiment. It is a top view of the room which installed the daylighting apparatus of 6th Embodiment. It is a top view of the room which installed the daylighting apparatus of 6th Embodiment. It is a top view of the room which installed the daylighting apparatus of 6th Embodiment. It is a graph which shows the change of the transmittance of a daylighting film when the sun direction changes. It is a figure which shows the positional relationship between the sun and a louver. It is a figure which shows the positional relationship between the sun and a louver. It is sectional drawing of the room which installed the daylighting apparatus. It is a top view which shows the ceiling of a room.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 12.
FIG. 1 is a front view of the daylighting apparatus of the first embodiment. FIG. 2 is a cross-sectional view of the lighting device along the line II-II of FIG. FIG. 3 is a perspective view of the daylighting device.
In each of the following drawings, in order to make each component easy to see, the scale of the dimension may be different depending on the component.

As shown in FIGS. 1 to 3, the daylighting device 10 of the present embodiment is installed so as to face the indoor surface 11a of the window glass 11. In the following description, the indoor surface of the window glass 11 is referred to as a window surface 11a. The daylighting device 10 includes a plurality of louvers 12 and a head box 13 (support member) that supports the plurality of louvers 12. Each of the plurality of louvers 12 extends in the vertical direction and is arranged side by side in the horizontal direction. The head box 13 supports the plurality of louvers 12 in a suspended form on the indoor side of the window surface 11a, and moves the plurality of louvers 12 in the horizontal direction.

As shown in FIG. 3, each of the plurality of louvers 12 is supported by the head box 13 with the upper end of the louvers 12 hooked on a hook described later. A balance weight 14 is provided at the lower end of each louver 12. At the end of the head box 13, an operation code 16 for opening and closing a plurality of louvers 12 and rotating each louver 12 is provided.

As shown in FIG. 2, each louver 12 is a group having a first surface 19a provided with a lighting unit 18 including a plurality of prism structures 17, and a second surface 19b opposite to the first surface 19a. It is composed of material 19. The plurality of prism structures 17 are provided on the first surface 19a so that the longitudinal direction of each prism structure 17 extends in the direction perpendicular to the longitudinal direction of the louver 12, that is, in the substantially horizontal direction.

As the base material 19, for example, a light-transmitting base material composed of resins such as a thermoplastic polymer, a thermosetting resin, and a photopolymerizable resin is used. A light transmissive substrate having an acrylic polymer, an olefin polymer, a vinyl polymer, a cellulose polymer, an amide polymer, a fluorine polymer, a urethane polymer, a silicone polymer, an imide polymer or the like is used. Specifically, for example, triacetyl cellulose (TAC) film, polyethylene terephthalate (PET) film, cycloolefin polymer (COP) film, polycarbonate (PC) film, polyethylene naphthalate (PEN) film, polyether sulfone (PES). A light-transmitting base material such as a film or a polyimide (PI) film is preferably used. In this embodiment, a PET film having a thickness of 250 μm is used as an example. The total light transmittance of the base material 19 is preferably 90% or more, for example. This provides sufficient transparency.

As shown in FIG. 2, in this example, the cross-sectional shape of the prism structure 17 perpendicular to the longitudinal direction is an isosceles triangle. In the cross-sectional shape of the prism structure 17, the angle formed by the surface 17a and the surface 17b and the angle formed by the surface 17a and the surface 17c are, for example, 65 °. Further, the prism structure 17 has a function of collecting sunlight into the room by reflecting the light incident from the upper surface 17b on the lower surface 17c. In this case, the surface 17c is referred to as a reflective surface 17c in the following description.

The prism structure 17 is made of an organic material having light transmittance and photosensitivity, such as acrylic resin, epoxy resin, and silicone resin. Further, a mixture made of a transparent resin in which a polymerization initiator, a coupling agent, a monomer, an organic solvent and the like are mixed with these resins can be used. In addition, the polymerization initiator may contain various additional components such as stabilizers, inhibitors, plasticizers, optical brighteners, mold release agents, chain transfer agents, other photopolymerizable monomers and the like. Good. The total light transmittance of the organic material is preferably 90% or more. This provides sufficient transparency.

There are several possible routes when the sunlight L transmitted through the window glass 11 enters the prism structure 17 and is emitted from the base material 19, but FIG. 2 shows a typical route.
As shown in FIG. 2, the prism structure 17 emits the light L reflected by the reflecting surface 17c from the second surface 19b side of the base material 19 and advances it toward the horizontal direction or the ceiling in the room. By the action of the prism structure 17, the daylighting device 10 takes in the sunlight L into the room and guides it in the horizontal direction or the ceiling direction.

Air is present in the gap 20 between the two adjacent prism structures 17. Therefore, the refractive index of the gap 20 is approximately 1.0. By setting the refractive index of the gap portion 20 to 1.0, the critical angle at the interface between the gap portion 20 and the prism structure 17 is minimized. In the case of the present embodiment, the void portion 20 is an air layer made of air, but the void portion 20 is covered with, for example, another member to form a closed space, and is not made of an inert gas such as nitrogen. It may be an active gas layer or a reduced pressure layer in a reduced pressure state.

Instead of this configuration, the void 20 may be filled with another low refractive index material. However, the difference in refractive index at the interface between the prism structure 17 and the void 20 is greater when air is present than when any low refractive index material is present in the void 20. Therefore, when air is present in the gap portion 20, the critical angle of the light totally reflected by the reflecting surface 17c is the smallest among the sunlight L incident on the prism structure 17 according to Snell's law.

FIG. 4 is a perspective view of the carrier 22 and the spacer link 23. FIG. 5 is a plan view of the head box 13. FIG. 6 is an exploded perspective view of the rotation mechanism of the carrier 22.
As shown in FIGS. 4 to 6, the head box 13 includes an opening / closing shaft 24, a rotating shaft 25, a plurality of carriers 22, and a plurality of spacer links 23. Inside the head box 13, an opening / closing shaft 24 used for opening / closing the louver 12 and a rotating shaft 25 used for the rotating operation of the louver 12 are housed.

As shown in FIG. 4, the carrier 22 is provided corresponding to each of the plurality of louvers 12. The carrier 22 supports the louvers 12 in a suspended form, and has a function of moving each louver 12 by moving along the opening / closing shaft 24. The carrier 22 includes a hole 22c through which the opening / closing shaft 24 is inserted, a hole 22d through which the rotary shaft 25 is inserted, and a hook 26 for suspending the louver 12.

As shown in FIG. 6, the carrier 22 includes a rotary gear 27 and a rotary shaft 29 having a worm wheel 28 at the upper end and a hook 26 at the lower end. The rotary gear 27 rotates in conjunction with the rotation of the rotary shaft 25 inserted through the hole 22d of the carrier 22. At this time, the worm wheel 28 rotates in conjunction with the rotating gear 27, and the hook 26 rotates via the rotating shaft 29. As a result, the louver 12 suspended from the hook 26 rotates about a rotation axis extending in the vertical direction. In the horizontal plane, as shown in FIG. 4, the groove direction of the hook 26 (direction of arrow W) corresponds to the width direction of the louver 12.

The spacer link 23 has a function of connecting two adjacent carriers 22 and defining a distance between the two adjacent carriers 22. By adjusting the length of the spacer link 23, the distance between two adjacent carriers 22 can be changed.
The spacing between the two adjacent carriers 22 corresponds to the pitch of the two adjacent louvers 12. That is, the pitch of the louver 12 can be changed by adjusting the length of the spacer link 23. In the daylighting device 10 of the present embodiment, the length of the spacer link 23 is adjusted so that the pitch of the louvers 12 is equal to or larger than the width of the louvers 12 (dimension in the lateral direction).
In this specification, the louver pitch is defined as the distance between the rotation axes of two adjacent louvers when the lighting device is viewed from the front.

8A-8C are perspective views of the carrier 122 for explaining the rotational operation of the hook 126 of the general carrier 122. FIG. 8B shows the direction of the hook 126 when the louver 112 is in the reference position. FIG. 8A shows a state in which the louver 112 is rotated to the maximum clockwise (direction of arrow RA in FIG. 8B) with respect to the reference posture when the louver 112 is viewed from above. FIG. 8C shows a state in which the louver 112 is rotated to the maximum counterclockwise (direction of the arrow RC in FIG. 8B) with respect to the reference posture when the louver 112 is viewed from above.

As shown in FIGS. 8A to 8C, in a general carrier 122, the hook 126 faces the indoor side with the hook 126 facing sideways (right side or left side) as a reference posture when viewed from a person in the room. The hook 126 rotates between the facing state and the window side facing state.

On the other hand, FIGS. 7A to 7C are perspective views of the carrier 22 for explaining the rotational operation of the hook 26 of the carrier 22 in the present embodiment. FIG. 7B shows the direction of the hook 26 when the louver 12 is in the reference posture. FIG. 7A shows a state in which the louver 12 is rotated to the maximum counterclockwise (direction of arrow RA in FIG. 7B) with respect to the reference posture when the louver 12 is viewed from above. FIG. 7C shows a state in which the louver 12 is rotated to the maximum clockwise (direction of the arrow RC in FIG. 7B) with respect to the reference posture when the louver 12 is viewed from above.

As shown in FIGS. 7A to 7C, unlike the general carrier 122, the carrier 22 of the present embodiment has a reference posture in which the hook 26 faces the window side or the indoor side when viewed from a person in the room. The hook 26 rotates between the state in which the hook 26 faces the right side and the state in which the hook 26 faces the left side. In order to realize the carrier 22 of the present embodiment without adding a component to the general carrier 122, the meshing position of the worm wheel 28 with respect to the rotating gear 27 in the reference posture is set to the general carrier. It may be rotated by 90 ° from the meshing position in 22.

Alternatively, the direction changing joint 31 shown in FIG. 9 may be used as a means for realizing the operation of the louver 12 of the present embodiment.
FIG. 9 is a perspective view of the direction changing joint 31. FIG. 10 is a side view of the carrier 22 with the direction changing joint 31 attached.

As shown in FIG. 9, the direction changing joint 31 includes an annular portion 31A and a hook portion 31B for suspending the louver 12. The annular portion 31A is provided with a hole 31h for being hooked on the hook 26 of the carrier 22. The plate surface 31Aa of the annular portion 31A and the groove direction W of the hook portion 31B are orthogonal to each other in the horizontal plane.

As shown in FIG. 10, by attaching the direction changing joint 31 having the above configuration to the general carrier 122, the direction of the hook (hook portion 31B) is changed by 90 ° with respect to the case where the direction changing joint 31 is not attached. be able to. In this way, the rotation operation of the louver 12 peculiar to the present embodiment as shown in FIGS. 7A to 7C can be performed while using the general carrier 122.

Generally, in a daylighting device, parameters such as the shape of the prism structure constituting the daylighting unit and the inclination angle of each surface are optimal daylighting when sunlight is incident from a direction perpendicular to the extending direction of the prism structure. It is usually designed to provide characteristics. Therefore, if the daylighting device is designed for south-facing windows and installed as it is, the desired daylighting performance can be obtained when the sun is in the south direction in the daytime, but the sun is eastward or westward in the morning and evening. When in the orientation, the desired lighting performance cannot be obtained. In this case, if the lighting unit can be rotated according to the movement of the sun so that the sunlight is incident from the direction perpendicular to the extending direction of the prism structure, the desired lighting performance can always be obtained. it can.

Here, a lighting device of a comparative example in which a louver in a conventional general vertical blind is replaced with a lighting louver is assumed.
FIG. 12 is a diagram for explaining the operation of the louver 212 in the lighting device 210 of the comparative example.

In the conventional general vertical blind, when the louvers are fully closed, the louver pitch P is the width T of the louvers in order to surely prevent light from leaking between adjacent louvers and being seen from the outside. Smaller than Therefore, in the lighting device 210 of the comparative example, when the louver 212 is in the fully closed state, the edge portion of the louver 212 in the width direction overlaps with the edge portion of the adjacent louver 212 as shown in FIG. In this case, if the louver 212 is to be rotated counterclockwise (in the direction indicated by the arrow RE) in FIG. 12 from the fully closed state, the adjacent louvers 212 interfere with each other and the louver 212 cannot be rotated.

Therefore, in the light collecting device 210 of the comparative example, in order to rotate the louver 212 without any trouble, the position where the louver 212 is fully opened, that is, the position where the first surface 212a of the louver 212 faces the direction perpendicular to the window surface 11a. The louver 212 is rotated clockwise (the direction indicated by the arrow RF) to the fully closed state, and the louver 212 is rotated counterclockwise (the direction indicated by the arrow RE) to the fully closed state. The louver 212 will be rotated between the posture and the posture. In this case, for example, the time until the sun moves from the east (E) to the south (S) is such that the first surface 212a of the louver 212, that is, the surface on the side where the prism structure is provided, follows the movement of the sun. However, the time it takes for the sun to move from the south (S) to the west (W) does not allow the first surface 212a of the louver 212 to follow the movement of the sun.

On the other hand, FIG. 11 is a diagram for explaining the operation of the louver 12 in the daylighting device 10 of the present embodiment.
In the lighting device 10 of the present embodiment, as shown in FIG. 11, the louver pitch P is equal to or larger than the louver width T. Therefore, unlike the lighting device 210 of the comparative example, the adjacent louvers 12 do not interfere with each other. As a result, the louver 12 can be rotated so as to open in either the left or right direction with the position where the louver 12 is fully closed as a reference posture. In other words, with the position where the first surface 12a of the louver 12 faces in the direction parallel to the window surface 11a as a reference posture, the louver 12 is viewed from above in a clockwise direction (direction indicated by arrow RF) and counterclockwise (in arrow RE). It can be rotated in both directions). That is, the louver 12 of the present embodiment can rotate in two different rotation directions about a rotation axis extending in the vertical direction from a reference posture in which the first surface 12a is located substantially parallel to the window surface 11a. ing.

As a result, for example, during the day until the sun moves from the east (E) to the west (W), the first surface 12a of the louver 12, that is, the surface on the side where the prism structure 17 is provided is used as the movement of the sun. It can be made to follow.

In this way, according to the daylighting device 10 of the present embodiment, the directions of the plurality of louvers 12 can be effectively followed by the movement of the sun without using a complicated rotation mechanism. Thereby, the desired lighting performance can be obtained.

[Second Embodiment]
Hereinafter, the daylighting apparatus of the second embodiment will be described with reference to FIGS. 13 to 19.
The basic configuration of the daylighting apparatus of the second embodiment is the same as that of the first embodiment, and the arrangement of the plurality of louvers is different from that of the first embodiment. Therefore, the description of the entire lighting device will be omitted.
FIG. 13 is a front view of the daylighting device of the second embodiment. FIG. 14 is a perspective view of the daylighting device. FIG. 15 is a cross-sectional view of the lighting device along the XV-XV line of FIG.
In FIGS. 13 to 19, components common to the drawings used in the first embodiment are designated by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 13 to 15, when a plurality of louvers 35 are viewed in order from the indoor side in the horizontal direction in the lighting device 34 of the present embodiment, they are adjacent to each other, such as front, back, front, back, and so on. The louvers 35 are arranged at positions that are alternately displaced in the front-rear direction. That is, the rotating shafts 29 of the adjacent louvers 35 when the lighting device 34 is viewed from the front are arranged at positions where the distances from the window surface 11a are different from each other. In FIG. 5, the plurality of louvers 35 are arranged in two rows, and the rotation axis 29 of the odd-numbered louver 35A counted from the left is arranged on the side closer to the window surface 11a, and is the even-numbered louver 35 counted from the left. The rotation axis of the louver 35B is arranged on the side far from the window surface 11a.

As shown in FIG. 15, the louver pitch P is smaller than the louver width T. As an example, the louver pitch P is 95 mm and the louver width T is 100 mm. Therefore, as shown in FIG. 13, when the lighting device 34 is viewed from the front, the edges of the adjacent louvers 35 overlap each other. In this example, the amount S of the rotation shafts 29 of the adjacent louvers 35 in the front-rear direction is about 30 mm.

FIG. 16 is a perspective view of the carrier 36. FIG. 17 is a bottom view of the carrier 36. 16 and 17 show only two adjacent carriers 36 among the plurality of carriers 36 corresponding to the plurality of louvers 35.

As shown in FIGS. 16 and 17, in the carrier 36 of the present embodiment, the first gear 38 is provided at the lower end of the first shaft 37 connected to the same worm wheel (not shown) as in the first embodiment. ing. Further, a second shaft 39 supported by a support mechanism (not shown) is provided, a second gear 40 that meshes with the first gear 38 is provided at the upper end of the second shaft 39, and a second gear 40 is provided at the lower end of the second shaft 39. A hook 41 similar to that of the first embodiment is provided.

Further, in the two adjacent carriers 36, the positions of the second shaft 39 with respect to the first shaft 37 are different from each other. For example, in FIG. 16, in the carrier 36 on the left side, the second shaft 39 is arranged on the back side of the first shaft 37, and in the carrier 36 on the right side, the second shaft 39 is arranged on the front side of the first shaft. Since the position of the second shaft 39 corresponds to the position of the rotating shaft 29 of the louver 35, the distances of the rotating shafts 29 of the adjacent louvers 35 from the window surface can be made different from each other by this configuration.

The circle of reference numeral K shown in FIG. 15 shows the locus of the edge of the louver 35 when each louver 35 is rotated. In this way, even if the adjacent louvers 35 overlap each other when the lighting device 34 is viewed from the front, the positions of the rotation axes 29 of the adjacent louvers 35 are displaced in the front-rear direction, so that each louver 35 is rotated. Adjacent louvers 35 do not interfere with each other when they are made to rotate. As a result, also in the daylighting device 34 of the present embodiment, as in the first embodiment, the louver 35 is viewed clockwise from above with the position where the first surface of the louver 35 faces parallel to the window surface as a reference posture. , Can be rotated both counterclockwise.

Also in the present embodiment, the direction of the plurality of louvers 35 can be effectively followed by the movement of the sun without using a complicated rotation mechanism, and a desired lighting performance can be obtained. The same effect as is obtained.

Further, in the case of the present embodiment, since the adjacent louvers 35 overlap each other when the daylighting device 34 is viewed from the front, the sunlight incident from the front of the daylighting device 34 leaks as compared with the first embodiment. It is unlikely to occur. If sunlight is obliquely incident when the louver 35 is in the reference posture (a posture parallel to the window surface), leakage may occur, but if sunlight is incident diagonally, the louver 35 is rotated. Therefore, there is no particular problem. Therefore, it is possible to prevent the person in the room from feeling dazzling due to the leaked light.

Further, in the case of the present embodiment, since the positions of the rotating shafts 29 of the adjacent louvers 35 are shifted back and forth by using the second shaft 39 as shown in FIGS. 16 and 17, the rotating shafts in the head box and the rotating shafts It is not necessary to change the basic configuration of the carrier from the first embodiment. However, the present invention is not limited to this configuration, and a configuration such as shifting the position of the carrier itself back and forth may be adopted.

(First modification)
FIG. 18 is a cross-sectional view of the daylighting device 44 of the first modification of the present embodiment.
As shown in FIG. 18, in the lighting device 44 of this modified example, the louver pitch P1 is smaller than the louver pitch P of the above embodiment. The louver pitch P of the above embodiment was 95 mm, but the louver pitch P1 of this modification is 75 mm. In this case, the overlapping width of the adjacent louvers 35 when the lighting device 44 is viewed from the front is larger than the overlapping width of the above-described embodiment. Further, the deviation amount S1 of the rotation axes of the adjacent louvers 35 in the front-rear direction is about 65 mm, which is larger than the deviation amount S in the front-rear direction of the above embodiment.

(Second modification)
FIG. 19 is a cross-sectional view of the lighting device 47 of the first modification of the present embodiment.
As shown in FIG. 19, in the lighting device 47 of this modified example, the widths of the two rows of louvers 48 and 49 having different distances from the window surface 11a are different from each other. In this example, the width of the louver 49 on the indoor side is narrower than the width of the louver 48 on the window side. Alternatively, the width of the louver on the indoor side may be wider than the width of the louver on the window side. As an example, the width T1 of the louver 49 on the indoor side is 50 mm, and the width T2 of the louver 48 on the window side is 100 mm. The louver pitch P is 70 mm.

As described above, various parameters such as the width of the louver on the indoor side, the width of the louver on the window side, the louver pitch, and the amount of deviation of the rotation axis of the louver in the front-rear direction can be appropriately set. In any case, the same effect as that of the above embodiment can be obtained.

[Third Embodiment]
Hereinafter, the daylighting apparatus of the third embodiment will be described with reference to FIGS. 20 to 21B.
The basic configuration of the daylighting apparatus of the third embodiment is the same as that of the first embodiment, and is different from the first embodiment in that a dimming member is added. Therefore, the description of the entire lighting device will be omitted.
FIG. 20 is a front view of the daylighting device 50 of the third embodiment. FIG. 21A is a perspective view of the carrier 22 in a state where the louver 12 is housed. FIG. 21B is a perspective view of the carrier 22 with the louver 12 open.
In FIGS. 20 to 21B, components common to the drawings used in the first embodiment are designated by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 20, the daylighting device 50 of the present embodiment includes a plurality of louvers 12, a head box 13, and a plurality of dimming members 51. Each of the plurality of dimming members 51 is provided corresponding to the position of each gap between the adjacent louvers 12. Each dimming member 51 reduces the amount of light traveling straight through the gap between adjacent louvers 12. Each dimming member 51 has a rectangular shape extending in the vertical direction. The plurality of dimming members 51 may be arranged on the indoor side of the louver 12, or may be arranged on the window side of the louver 12. As the material of the dimming member 51, for example, cloth, paper, or the like can be used, and the light-shielding property can be adjusted depending on the selected material.

As shown in FIGS. 21A and 21B, the headbox 13 of the present embodiment further includes a connecting member 52 that connects two adjacent carriers 22 to each other. The connecting member 52 includes two plate members 52B that can be opened and closed via the hinge portion 52A. The dimming member 51 is suspended from the hinge portion 52A of the connecting member 52.

As shown in FIG. 21A, when a plurality of louvers 12 are housed and the two carriers 22 are close to each other, the two plate members 52B of the connecting member 52 are closed and the dimming member 51 is folded. As shown in FIG. 21B, in a state where the plurality of louvers 12 are pulled out and the two carriers 22 are separated from each other, the two plate members 52B of the connecting member 52 are opened and the dimming member 51 is opened. Therefore, the dimming member 51 is always arranged corresponding to the gap between the adjacent louvers 12 and does not rotate.
Other configurations of the daylighting device 50 are the same as those in the first embodiment.

Also in the present embodiment, the directions of the plurality of louvers can be effectively followed by the movement of the sun without using a complicated rotation mechanism, and a desired lighting performance can be obtained. A similar effect can be obtained.

Further, in the case of the present embodiment, since the daylighting device 50 includes the dimming member 51, the intensity of the light entering the room through the gap between the adjacent louvers 12 is weakened regardless of the angle of the louvers 12. .. As a result, it is possible to prevent the person in the room from feeling dazzling due to the leaked light.

(First modification)
FIG. 22 is a cross-sectional view of the lighting device 55 of the first modification of the present embodiment.
As shown in FIG. 22, the daylighting device 55 of this modified example includes a plurality of louvers 12, a head box 13, and a dimming member 56. Unlike the above embodiment, the dimming member 56 is provided so as to cover not only the position of each gap between the adjacent louvers 12 but also the entire plurality of louvers 12. The dimming member 56 reduces the amount of light traveling straight through the gap between the adjacent louvers 12, and further reduces the intensity of the light taken into the room via the daylighting unit 18. In this modification, the dimming member 56 may be suspended from the head box 13.

In the case of this modification, since the light transmitted through the louver 12 is transmitted through the dimming member 56 and taken into the room, the dimming member 56 needs to have a certain transmittance. Therefore, as the material of the dimming member 56, it is desirable to use a light-transmitting thin cloth, paper, or the like, for example, a cloth for a lace curtain.

The same effect as that of the above-described embodiment can be obtained in the lighting device 55 of this modified example.

[Fourth Embodiment]
Hereinafter, the daylighting apparatus of the fourth embodiment will be described with reference to FIG. 23.
The basic configuration of the lighting device of the fourth embodiment is the same as that of the first embodiment, and the configuration of the louver is different from that of the first embodiment. Therefore, the description of the entire lighting device will be omitted.
FIG. 23 is a perspective view of the louver 59 in the daylighting apparatus of the fourth embodiment.

As shown in FIG. 23, the louver 59 of the present embodiment includes a lighting film 60, a storage portion 61 for accommodating the lighting film 60, and a functional member 62 that causes a predetermined action on the incident light L. It has. The daylighting film 60 has a daylighting unit 18 including a plurality of prism structures 17, similar to the louver 12 of the first embodiment. In the storage unit 61, two light transmitting members 61A and 61B having visible light transmission are formed in a bag shape, and the daylighting film 60 is stored inside. The functional member 62 is connected below the storage portion 61.

For the two light-transmitting members 61A and 61B constituting the storage portion 61, for example, it is desirable to use a thin cloth, paper, or the like having light-transmitting property. The functional member 62 is composed of, for example, a light-shielding member, a light-diffusing member, or the like, and causes the louver 59 to have actions such as light-shielding property and light diffusing property. In addition, the functional member 62 may impart heat shielding property, ultraviolet ray blocking property, design property, and the like. Further, a plurality of functional members having different actions may be connected below the storage portion 61. In the present embodiment, the functional member 62 is sewn below the storage portion 61 by a thread or the like. The method of connecting the functional member 62 to the storage portion 61 is not limited to sewing, and any method may be used.

Also in the present embodiment, the first is that it is possible to realize a daylighting device capable of effectively following the movement of the sun in the directions of a plurality of louvers without using a complicated rotation mechanism and obtaining a desired daylighting performance. The same effect as that of the embodiment can be obtained.

Further, according to the present embodiment, the upper portion has the same daylighting action as that of the first embodiment, and the lower portion has various actions such as light shielding property, light diffusing property, heat shielding property, ultraviolet ray blocking property, and design property. 59 can be provided. Further, since the louver 59 has a configuration in which the daylighting film 60 is housed in the storage unit 61, the work such as removal and replacement of the daylighting film 60 can be easily performed. Further, for example, when the daylighting function is not required, a functional member such as a light diffusing film can be stored in the storage unit 61 instead of the daylighting film 60.

(First modification: louver)
FIG. 24 is a cross-sectional view of the louver 65 of the first modification of the present embodiment.
As shown in FIG. 24, in the louver 65 of the present modification, the daylighting film 60 is provided on the upper portion of the first surface 62a of the functional member 62. The functions and materials of the functional member 62 may be the same as those in the above embodiment, but since the light L is taken into the room via the functional member 62, the functional member 62 needs to have at least light transmission. As described above, the louver 65 does not necessarily have to have a storage portion. The daylighting film 60 is sewn on the functional member 62.

(Second modification: louver)
FIG. 25 is a cross-sectional view of the louver 68 of the second modification of the present embodiment.
As shown in FIG. 25, in the louver 68 of the present modification, the daylighting film 60 is provided on the upper portion of the second surface 62b of the functional member 62. In this modification, the daylighting film 60 is provided so that the first surface 60a on the side where the prism structure 17 is provided faces the second surface 62b of the functional member 62. The daylighting film 60 is fixed to the functional member 62 via adhesives 69 provided at a plurality of locations.

The same effect as that of the above embodiment can be obtained in the daylighting apparatus provided with the louvers 65 and 68 of these modified examples. In the case of the louvers 65 and 68 of these modified examples, the work of removing and replacing the daylighting film 60 is more difficult than in the above embodiment, but the method and structure of attaching the daylighting film 60 are simple and the cost of the louvers 65 and 68 is high. Can be reduced.

(Third variant: louver)
FIG. 26 is a cross-sectional view of the louver 71 of the third modification of the present embodiment.
As shown in FIG. 26, in the louver 71 of the present modification, the functional member 62 is connected to the lower side of the daylighting film 60 via a hook 72. The functions and materials of the functional member 62 may be the same as those in the above embodiment. Further, as a means for connecting the functional member 62 and the lighting film 60, a magnet, a fastener, a hook-and-loop fastener, a snap button, or the like may be used in addition to the hook 72. That is, the functional member 62 of this modification is removable from the louver 71.

The same effect as that of the above-described embodiment can be obtained in the daylighting device provided with the louver 71 of the present modification. Further, in the case of the louver 71 of the present modification, the functional member 62 can be easily removed or replaced as needed.

Further, the daylighting unit 18 of the daylighting film 60 is not limited to one in which a plurality of prism structures 7 having an isosceles right triangle cross section are arranged in the vertical direction, and the following various daylighting units may be used. Can be done.

(First modification: lighting unit)
FIG. 27 is a side view of the lighting unit 75 of the first modification of the present embodiment.
As shown in FIG. 27, the lighting unit 75 of the first modification has a trapezoidal cross-sectional shape perpendicular to the longitudinal direction of the prism structure 76.

(Second modification: lighting unit)
FIG. 28 is a side view of the lighting unit 78 of the second modification of the present embodiment.
As shown in FIG. 28, the lighting unit 78 of the second modification has a hexagonal cross-sectional shape perpendicular to the longitudinal direction of the prism structure 79.

(Third modification example: lighting unit)
FIG. 29 is a side view of the lighting unit 81 of the third modification of the present embodiment.
As shown in FIG. 29, the lighting unit 81 of the third modification has a cross-sectional shape perpendicular to the longitudinal direction of the prism structure 82 composed of straight lines and curved lines.

(Fourth modification: lighting section)
FIG. 30 is a front view of the lighting unit 84 of the fourth modification of the present embodiment.
As shown in FIG. 30, in the lighting unit 84 of the fourth modification, the plurality of prism structures 17 are provided so that the longitudinal direction of each prism structure 17 is parallel to the longitudinal direction of the louver 85. That is, the plurality of prism structures 17 are arranged in the longitudinal direction of the louver 85, that is, in the horizontal direction.

(Fifth modification: lighting unit)
FIG. 31 is a front view of the lighting unit 87 of the fifth modification of the present embodiment.
As shown in FIG. 31, in the lighting unit 87 of the fifth modification, the plurality of prism structures 17 are provided so that the longitudinal direction of each prism structure 17 is oblique to the longitudinal direction of the louver 88. There is. That is, the plurality of prism structures 17 are arranged obliquely with respect to the longitudinal direction of the louver 88.

(6th modification: lighting part)
FIG. 32 is a perspective view of the lighting unit 90 of the sixth modification of the present embodiment.
As shown in FIG. 32, in the lighting unit 90 of the sixth modification, the prism structure 91 is composed of a quadrangular pyramid-shaped structure. The prism structure 91 has one change point 520 whose shape changes. The prism structure 91 is composed of a first structure 530 and a second structure 540, and a change point 520 exists on a boundary line (tangent line) 550 where the first structure 530 and the second structure 540 are connected. ing. The first structure 530 has a shape in which a portion near the top of the regular quadrangular pyramid is cut in a direction perpendicular to the height direction of the regular quadrangular pyramid. The second structure 540 forms a regular quadrangular pyramid with the upper surface of the first structure 530 as the bottom surface.

The daylighting film used in the above embodiment may be used as a daylighting unit to which a light diffusion film as shown below is further added.

(First modification: lighting unit)
FIG. 33 is a cross-sectional view of the lighting unit 301 of the first modification.
As shown in FIG. 33, the daylighting unit 301 has a configuration in which the daylighting film 302 and the light diffusing member 303 for diffusing light are supported by a common frame 304. The light diffusing member 303 is arranged on the second surface 302b side of the daylighting film 302. The light diffusing member 303 is arranged at intervals in the light transmitting direction with respect to the daylighting film 302. The light diffusing member 303 is arranged in a state where the first surface 303a side on which the fine structure is formed faces the second surface 302b side of the daylighting film 302.

The light diffusing member 303 has a function of isotropically or anisotropically diffusing the light transmitted through the daylighting film 302.

(Second modification: lighting unit)
FIG. 34 is a cross-sectional view of the lighting unit 306 of the first modification.
As shown in FIG. 34, the lighting unit 306 has a configuration in which the lighting film 302 and the light diffusing member 303 are supported by a common frame 304. The light diffusing member 303 is arranged on the first surface 302a side of the daylighting film 302. The light diffusing member 303 is arranged in a state where the first surface 303a side on which the fine structure is formed faces the first surface 302a side of the daylighting film 302.

(Third modification example: lighting unit)
FIG. 35 is a perspective view of the lighting unit 308 of the third modification.
As shown in FIG. 35, the lighting unit 308 has a configuration in which a lighting unit 18 including a plurality of prism structures 17 and a light diffusion unit 309 made of a lenticular lens sheet are provided on each of the two surfaces of the base material. have. In this way, the lighting film and the light diffusing member may be an integral member.

The light diffusing member used in the daylighting units 301, 306, 308 of the above modification may be further as shown below.

(First modification: light diffusing member)
FIG. 36 is a cross-sectional view of the light diffusing member 311 of the first modification.
As shown in FIG. 36, in the light diffusing member 311 of the present modification, a microstructure layer 313 in which a large number of diffusing beads are dispersed in a binder resin is bonded to one surface of a light-transmitting base material 312. It is composed of a light diffusion sheet.

(Second modification: light diffusing member)
FIG. 37 is a perspective view of the light diffusing member 315 of the second modification.
As shown in FIG. 37, the light diffusing member 315 of this modification is composed of an anisotropic diffusing film in which a large number of needle-shaped fillers 317 are contained in a resin layer 316 made of a light transmissive resin. There is.

(Third modification example: light diffusing member)
FIG. 38 is a cross-sectional view of the light diffusing member 319 of the third modification.
As shown in FIG. 38, the light diffusing member 319 of this modification uses an anisotropic diffusing sheet in which a plurality of prisms 321 are provided on one surface side of the transmissive substrate 320.

(Fourth modification: light diffusing member)
FIG. 39A is a cross-sectional view of the light diffusing member 323 of the fourth modification. FIG. 39B is a perspective view of the light diffusing member 323 of the fourth modification.
As shown in FIGS. 39A and 39B, the light diffusing member 323 of this modification has a so-called pseudo-striped structure in which a plurality of striped protrusions 324 extending in one direction are arranged in a direction intersecting the extending direction. An anisotropic light diffusion sheet is used. Since the plurality of striped protrusions 324 extend in substantially one direction in the plane, the incident light can be diffused in a direction substantially orthogonal to the extending direction of the protrusions 324.

[Fifth Embodiment]
Hereinafter, the daylighting apparatus of the fifth embodiment will be described with reference to FIG. 40.
The basic configuration of the lighting device of the fifth embodiment is the same as that of the first embodiment, and the configuration of the louver is different from that of the first embodiment. Therefore, the description of the entire lighting device will be omitted.
FIG. 40 is a front view of the louver 97 in the daylighting apparatus of the fifth embodiment.

As shown in FIG. 40, the louver 97 of the present embodiment includes a lighting unit 18 and a solar cell element 98. The lighting unit 18 is provided above the louver 97, and the solar cell element 98 is provided below the louver 97. The configuration of the lighting unit 18 is the same as that of the first embodiment.
The specific form of the solar cell element 98 is not particularly limited, and various forms of the solar cell element are used.

Also in the present embodiment, the direction of the plurality of louvers 97 can be effectively followed by the movement of the sun without using a complicated rotation mechanism, and a daylighting device capable of obtaining desired daylighting performance can be realized. The same effect as that of 1 embodiment can be obtained.

Further, according to the present embodiment, since the louver 97 includes the solar cell element 98, efficient power generation can be performed when the louver 97 is rotated to follow the movement of the sun.

[Sixth Embodiment]
Hereinafter, the daylighting apparatus of the sixth embodiment will be described with reference to FIGS. 41A to 44.
The daylighting device of the sixth embodiment automatically controls the movement of a plurality of louvers. 41A to 41C are plan views of a room in which the daylighting device of the sixth embodiment is installed at different times in the day.

As shown in FIGS. 41A to 41C, the daylighting device 101 of the present embodiment includes a plurality of louvers 12, a head box 13, a rotation drive mechanism 102, a control unit 103, a plurality of illuminance sensors 104, and a sunshine sensor. It is equipped with 105.

The rotation drive mechanism 102 rotationally drives each of the plurality of louvers 12 by rotating the rotation shaft 25 (see FIG. 5). The control unit 103 controls the rotation drive mechanism 102 so as to automatically change the rotation angle of the louver 12 according to the direction of the sun. The plurality of illuminance sensors 104 detect the illuminance at a plurality of locations in the room. The sunshine sensor 105 detects the amount of direct sunshine on the window surface 11a. The configuration of the plurality of louvers 12 and the head box 13 is the same as that of the first embodiment.

In the daylighting device 101, the sunshine sensor 105 installed on the window surface 11a detects the amount of direct solar radiation, and the direct solar radiation amount data is transmitted to the control unit 103. The control unit 103 determines whether the current weather is sunny or cloudy (rainy) based on the direct solar radiation amount data. The control unit 103 automatically controls the movements of the plurality of louvers 12 when the weather is fine, and does not automatically control the louvers 12 when the weather is cloudy (rainy). As a means for determining the weather, a fisheye camera capable of photographing the whole sky may be used instead of the sunshine sensor 105, and the control unit 103 determines the weather based on the amount of clouds occupying the whole sky. It may be configured to judge.

Further, the control unit 103 is provided with a timer and automatically controls the louver 12 in the daytime, but does not automatically control the louver 12 at night, and the louver 12 is fully closed in consideration of the privacy of the room. .. Further, the plurality of louvers 12 rotate in the same phase.

The rotation drive mechanism 102 is composed of a drive source such as a motor that rotates the rotation shaft 25 in response to a drive signal from the control unit 103. The plurality of illuminance sensors 104 are installed at a plurality of locations (9 locations in the example of FIGS. 41A to 41C) on the ceiling surface of the room. The control unit 103 receives the illuminance data acquired by the plurality of illuminance sensors 104, grasps the current illuminance distribution in the room, and drives the plurality of louvers 12 to rotate by a predetermined rotation angle based on the illuminance distribution. Controls the mechanism 102.

In Japan, which belongs to the northern hemisphere, when the daylighting device 101 is installed on the south-facing window surface 11a, in the morning, as shown in FIG. 41A, the plurality of louvers 12 are rotated so as to tilt eastward (E). .. In the daytime, as shown in FIG. 41B, a plurality of louvers 12 face southward (S).
In the evening, as shown in FIG. 41C, the plurality of louvers 12 are rotated so as to tilt westward (W).

It is desirable that the control unit 103 obtains data on the optimum rotation angle of the louver 12 in advance by a method such as simulation or actual measurement. The control unit 103 monitors the change in illuminance in the room when the louver 12 is rotated as data for each season and time, and stores the rotation angle of the louver 12 when the illuminance is highest. It should be noted that the louver 12 and the sun are not always controlled to face each other depending on the light transmittance of the louver 12, the light emitting direction of the lighting unit, and the like.

As another configuration, the lighting device may not include an illuminance sensor. In that case, the latitude and longitude of the place where the daylighting device is installed, the position information of the daylighting device such as the direction of the window of the building, and the position information of the sun such as the sun altitude and the sun direction for each season and time are stored in advance in the control unit. It suffices if it is done. The control unit controls the movement of the louver based on the season and time from the calendar and timer.

Also in the present embodiment, the direction of the plurality of louvers 12 can be effectively followed by the movement of the sun without using a complicated rotation mechanism, and a daylighting device capable of obtaining desired daylighting performance can be realized. The same effect as that of 1 embodiment can be obtained.

Further, in the present embodiment, the effect of automatically controlling the louver 12 will be described below.
The present inventors installed a daylighting film on the south-facing window surface and investigated the change in light transmittance on the vernal equinox day.
FIG. 42 is a graph showing the change in transmittance of the daylighting film when the direction of the sun changes. In FIG. 42, the horizontal axis represents the azimuth angle (°) of the sun, and the vertical axis represents the light transmittance (%) of the daylighting film.

As shown in FIG. 42, it was found that the light transmittance was highest when sunlight was incident from a direction substantially facing the daylighting film, that is, when the azimuth angle of the sun was in the vicinity of 90 °. It was also found that the light transmittance decreases when sunlight is incident on the daylighting film from an oblique direction, that is, as the azimuth angle of the sun deviates from 90 °. Although not shown, the same tendency is shown in the autumn equinox, summer solstice, and winter solstice. From this, it was found that it is basically preferable to make the louver face the sun from the viewpoint of light transmittance.

In addition, the present inventors investigated the relationship between the solar altitude, the emission angle, and the emission direction when sunlight is incident on the daylighting film.
43 and 44 are diagrams showing the positional relationship between sunlight and the louver.

As a result of the study by the present inventors, it was found that when the solar altitude θin changes when the incident direction φin of sunlight is 0 °, the light is emitted at various emission angles θout. The reason why there are multiple emission angles θout even at the same solar altitude θin is that there is not one path in which sunlight is reflected by each surface of the prism structure and emitted from the daylighting film, but there are multiple paths. Because.

On the other hand, it was found that even if the solar altitude θin changes when the incident direction φin of sunlight is 0 °, the light emission direction φout does not change from 0 °. That is, focusing on the orientation, as shown in FIG. 43, the sunlight L incident on the lighting film 108 from the incident direction φin at 0 ° is emitted from the lighting film 108 at the emission direction φout at 0 °.

Next, when the solar altitude θin changes when the incident direction φin of sunlight is 60 °, the light is emitted at various emission angles θout. This point is the same as when φin is 0 °. However, it was found that when the incident direction φin of sunlight is 60 °, the emission direction φout of light also changes variously when the sun altitude θin changes. This point is different from the case where φin is 0 °. That is, as shown in FIG. 44, sunlight L incident on the lighting film 108 from a predetermined incident direction φin, for example, an incident direction φin of 60 ° is emitted from the lighting film 108 in a plurality of emission directions φout. ..

Therefore, as an effect when the angle of the louver is automatically controlled, if priority is given to improving the light transmittance, the louver may face the incident direction of sunlight. As a result, high light transmittance can be obtained. However, in this case, the light emission direction is limited to the same direction as the incident direction of sunlight. Further, when giving priority to adjusting the emission direction of light, the louver may not face the incident direction of sunlight, and sunlight may be incident from an oblique direction of the louver. As a result, even if the light transmittance is lowered, the light emission direction can be adjusted, for example, by guiding the light toward the back of the room even in the morning and evening.

[Daylighting system]
FIG. 45 is a room model 2000 equipped with a daylighting device and a lighting dimming system, and is a cross-sectional view taken along the line JJ'of FIG. FIG. 46 is a plan view showing the ceiling of the room model 2000.

In the room model 2000, the ceiling material constituting the ceiling 2003a of the room 2003 into which the outside light is introduced may have high light reflectivity. As shown in FIGS. 45 and 46, a light-reflecting ceiling material 2003A is installed on the ceiling 2003a of the room 2003 as a ceiling material having light reflection. The light-reflecting ceiling material 2003A aims to promote the introduction of outside light from the daylighting device 2010 installed in the window 2002 to the inner part of the room, and is installed on the ceiling 2003a near the window. There is. Specifically, it is installed in a predetermined area E (area about 3 m from the window 2002) of the ceiling 2003a.

As described above, the light-reflecting ceiling material 2003A allows the outside light introduced into the room through the window 2002 in which the daylighting device 2010 (the daylighting device of any of the above-described embodiments) is installed to the interior of the room. Efficiently guides you to. The outside light introduced from the daylighting device 2010 toward the ceiling 2003a in the room is reflected by the light-reflecting ceiling material 2003A, and turns to illuminate the desk surface 2005a of the desk 2005 placed in the back of the room. , The effect of brightening the desk surface 2005a is exhibited.

The light-reflecting ceiling material 2003A may be diffuse-reflecting or specular-reflecting. In order to achieve both the effect of brightening the desk surface 2005a of the desk 2005 placed in the back of the room and the effect of suppressing glare rays that are unpleasant for people in the room, the characteristics of both are appropriately mixed. Is preferable.

As described above, most of the light introduced into the room by the daylighting device 2010 goes to the ceiling near the window 2002, but the amount of light is often sufficient in the vicinity of the window 2002. Therefore, by using the light-reflecting ceiling material 2003A as described above, the light incident on the ceiling (region E) near the window can be distributed to the inner part of the room where the amount of light is smaller than that near the window.

In the light-reflective ceiling material 2003A, for example, a metal plate such as aluminum is embossed with irregularities of about several tens of microns, or a metal thin film such as aluminum is deposited on the surface of a resin substrate having similar irregularities. It can be made by using metal leaf. Alternatively, the unevenness formed by the embossing process may be formed by a curved surface having a larger period.

Further, the light distribution characteristics and the distribution of light in the room can be controlled by appropriately changing the embossing shape formed on the light-reflecting ceiling material 2003A. For example, when the stripe shape extending to the inner part of the room is embossed, the light reflected by the light-reflecting ceiling material 2003A is in the left-right direction of the window 2002 (the direction intersecting the longitudinal direction of the unevenness). spread. If the size and orientation of the windows 2002 in the room 2003 are limited, this property is used to diffuse the light horizontally by the light-reflecting ceiling material 2003A and toward the back of the room. It can be directed and reflected.

The daylighting device 2010 is used as part of the lighting dimming system of the room 2003. The lighting dimming system includes, for example, a daylighting device 2010, a plurality of indoor lighting devices 2007, a solar radiation adjusting device 2008 installed on a window, these control systems, and a light-reflecting ceiling material 2003A installed on the ceiling 2003a. It is composed of the constituent members of the entire room including and.

In the window 2002 of the room 2003, a daylighting device 2010 is installed on the upper side, and a solar radiation adjusting device 2008 is installed on the lower side. Here, a blind is installed as the solar radiation adjusting device 2008, but the present invention is not limited to this.

In the room 2003, a plurality of indoor lighting devices 2007 are arranged in a grid pattern in the left-right direction (Y direction) of the window 2002 and the depth direction (X direction) of the room. These plurality of indoor lighting devices 2007, together with the daylighting device 2010, constitute the entire lighting system of the room 2003.

As shown in FIGS. 45 and 46, for example, the office ceiling 2003a in which the length L _{1 in} the left-right direction (Y direction) of the window 2002 is 18 m and the length L _{2 in} the depth direction (X direction) of the room 2003 is 9 m. Is shown. Here, the indoor lighting devices 2007 are arranged in a grid pattern with an interval Q of 1.8 m in each of the lateral direction (Y direction) and the depth direction (X direction) of the ceiling 2003a.
More specifically, 50 indoor lighting devices 2007 are arranged in 11 rows (Y direction) x 5 columns (X direction).

The indoor lighting device 2007 includes an indoor lighting fixture 2007a, a brightness detection unit 2007b, and a control unit 2007c, and has a configuration in which the brightness detection unit 2007b and the control unit 2007c are integrated with the indoor lighting fixture 2007a.

The indoor lighting device 2007 may include a plurality of indoor lighting fixtures 2007a and a plurality of brightness detecting units 2007b. However, one brightness detection unit 2007b is provided for each indoor lighting fixture 2007a. The brightness detection unit 2007b receives the reflected light of the irradiated surface illuminated by the indoor lighting fixture 2007a and detects the illuminance of the irradiated surface. Here, the brightness detection unit 2007b detects the illuminance of the desk surface 2005a of the desk 2005 placed in the room.

One control unit 2007c provided in each indoor lighting device 2007 is connected to each other. Each indoor lighting device 2007 has a control unit 2007c connected to each other so that the illuminance of the desk surface 2005a detected by each brightness detection unit 2007b becomes a constant target illuminance L0 (for example, average illuminance: 750 lp). Feedback control is performed to adjust the light output of the LED lamp of each indoor lighting fixture 2007a.

According to the daylighting system of the present embodiment, by linking the daylighting from the daylighting device 2010, which fluctuates with sunlight, with the room lighting device 2007, a constant illuminance can be obtained regardless of the time and the position of the room 2003. It is possible to achieve both a comfortable environment and efficient energy saving.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the specific description of the number, shape, dimensions, arrangement, material, etc. of each component such as the louver and the support member constituting the daylighting device is not limited to the one illustrated in the above embodiment, and can be changed as appropriate. Is.

One aspect of the present invention can be used as a daylighting device installed on a window surface of a building and taking in outside light such as sunlight into a room.

10, 34, 44, 47, 50, 55, 101 ... Daylighting device, 11a ... Window surface, 12, 35, 35A, 35B, 48, 49, 59, 65, 68, 71, 85, 88, 97 ... Louver, 13 ... Headbox (support member), 17,76,79,82,91 ... Prism structure, 18,75,78,81,84,87,90 ... Daylighting unit, 29 ... Rotating shaft, 51,56 ... Reduced Optical member, 60 ... Daylighting film, 61 ... Storage unit, 62 ... Functional member, 98 ... Solar cell element, 102 ... Rotation drive mechanism, 103 ... Control unit

Claims (12)

Multiple louvers, each extending vertically and arranged horizontally,
A support member that supports the plurality of louvers in a suspended form on the indoor side of the window surface and moves the plurality of louvers in the horizontal direction.
With
Each of the plurality of louvers has a first surface provided with a daylighting portion including a plurality of prism structures.
Each of the plurality of louvers can rotate in two different rotation directions about a rotation axis extending in the vertical direction from a reference posture in which the first surface is substantially parallel to the window surface. Daylighting device. The daylighting device according to claim 1, wherein each of the plurality of louvers is rotatable according to the direction in which the sun moves. A rotary drive mechanism that rotationally drives each of the plurality of louvers,
A control unit that controls the rotation drive mechanism so as to automatically change the rotation angle of the louver according to the direction of the sun.
2. The daylighting apparatus according to claim 2. The daylighting device according to claim 2, wherein the louver further includes a solar cell element. The lighting device according to claim 1, wherein the pitch between the adjacent louvers is equal to or larger than the width of the louvers. The pitch between the adjacent louvers is less than the width of the louvers.
The lighting device according to claim 1, wherein the rotation axes of the adjacent louvers are arranged at positions where the distances from the window surface are different from each other. The daylighting apparatus according to claim 1, further comprising a dimming member that reduces the amount of light traveling straight through the gap between the adjacent louvers. The louver includes a daylighting film having a first surface provided with a daylighting part including the plurality of prism structures, and a storage part made of a material having visible light transmission and accommodating the daylighting film. The daylighting device according to claim 1. The daylighting device according to claim 1, wherein the louver further includes a functional member that causes a predetermined action on the incident light. The daylighting device according to claim 9, wherein the functional member is removable from the louver. The daylighting device according to claim 9, wherein the functional member is a light-shielding member. The daylighting device according to claim 9, wherein the functional member is a light diffusing member.

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