WO2018012401A1 - Slat and blind - Google Patents

Abstract

Provided is a slat provided with: a light transmissive, plate-shaped base material that extends in one direction; an optical function layer that comprises a plurality of convex structures and that is provided on at least one face of the base material; and a plurality of projections provided on at least one face of the base material. The measurement of the projections along the thickness direction of the base material is larger than the measurement of the convex structures along the thickness direction of the base material. Also provided is a blind provided with a plurality of the slats.

Description

Slats and blinds

One aspect of the invention relates to slats and blinds.
This application claims priority on July 11, 2016 based on Japanese Patent Application No. 2016-137054 filed in Japan, the contents of which are incorporated herein by reference.

Conventionally, blinds have been used in order to adjust the solar radiation from the sun entering the building and prevent it from being seen from the outside by installing it at the opening of the building such as a window. As such a blind, there is known a blind provided with a transparent light control body for adjusting the amount of solar radiation taken in and the transparency with respect to the external visual line and the internal visual line (Patent Document 1). Such a blind is provided with an uneven surface on the surface of the slat substrate.

JP 2015-42812 A

When a slat provided with an uneven surface is stored, the upper and lower slats come into contact with each other to cause scratches on the uneven surface, which may impair the optical function.

One aspect of the present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a slat and a blind in which damage to the optical functional layer is suppressed.

A slat according to one embodiment of the present invention includes a plate-like light-transmitting base material extending in one direction and an optical functional layer provided on at least one surface of the base material, which includes a plurality of convex structures. And a plurality of protrusions provided on at least one surface of the base material, and the size of the protrusion along the thickness direction of the base material is the convex structure along the thickness direction of the base material It is larger than the dimensions of the object.

The optical functional layer includes a first optical functional layer and a second optical functional layer respectively provided on both surfaces of the substrate, and the dimension of the convex structure along the thickness direction of the substrate is It is good also as a structure which is the sum of the height of the said convex structure of a said 1st optical function layer, and the height of the said convex structure of a said 2nd optical function layer.

The plurality of protrusions include a plurality of first protrusions and a plurality of second protrusions provided on both surfaces of the substrate, respectively. The first protrusions and the second protrusions are viewed from the thickness direction of the substrate. It is good also as a structure which is arrange | positioned in the position which overlaps and the dimension of the said protrusion along the thickness direction of the said base material is the sum of the height of a said 1st protrusion, and the height of a said 2nd protrusion.

A fitting protrusion provided on a surface opposite to the surface on which the protrusion is provided, the fitting protrusion being positioned between the protrusions adjacent to each other when viewed from the thickness direction of the substrate; It is good also as a structure.

The plurality of protrusions may be arranged without gaps when viewed from the extending direction of the base material.

The base may be provided with a hole through which a cord is inserted, and the protrusion may be provided at a position different from the hole when viewed from a direction orthogonal to the extending direction of the base. .

The base material may be bent along a reference line parallel to the extending direction.

The base has a first plate located on one side with respect to the reference line and a second plate located on the other side, and the optical functional layer and the protrusion are formed on the first plate and It is good also as a structure provided in any one or both among the said 2nd board.

The protrusion may have a shape that is long in a direction orthogonal to the extending direction of the base material when viewed from the thickness direction of the base material.

The base material may be provided with a convex portion and a concave portion that can be fitted to each other at both ends in the extending direction.

The protrusions may be colored.

• Blinds with multiple slats.

According to one aspect of the present invention, it is possible to provide a slat and a blind in which damage to the optical functional layer is suppressed.

It is a perspective view which shows the whole structure of the blind of 1st Embodiment. It is the perspective view which expanded the principal part of the blind of 1st Embodiment, and shows the state whose inclination angle of a slat is a 1st angle. It is the perspective view which expanded the principal part of the blind of 1st Embodiment, and shows the state which the inclination angle of a slat is a 2nd angle. It is a perspective view of the slat of 1st Embodiment. It is an enlarged view at the time of seeing the slat of 1st Embodiment from the left-right direction. It is a schematic diagram which shows the optical path of the light which injected into the slat of 1st Embodiment. It is a schematic diagram which shows the modification which can be employ | adopted as a convex structure of the optical function layer of 1st Embodiment, and shows the example in the case of being comprised by the prism body of a cross-sectional right triangle shape. It is a schematic diagram which shows the modification which can be employ | adopted as a convex-shaped structure of the optical function layer of 1st Embodiment, and shows the example in the case of being comprised by the cross-sectional trapezoid prism body. It is a schematic diagram which shows the modification which can be employ | adopted as a convex structure of the optical function layer of 1st Embodiment, and shows the example in the case of being comprised by the cross-sectional hexagonal prism body. It is a schematic diagram which shows the modification which can be employ | adopted as a convex structure of the optical function layer of 1st Embodiment, and shows the example in the case of forming in the surface on the opposite side. It is the schematic diagram seen from the left-right direction in the case of laminating | stacking multiple slats of 1st Embodiment. It is a schematic diagram which shows the modification which can be employ | adopted as protrusion of 1st Embodiment, and a protrusion shows the thing of cross-sectional trapezoid shape. It is a schematic diagram which shows the modification which can be employ | adopted as protrusion of 1st Embodiment, and a protrusion shows a cross-sectional triangle shape. It is a schematic diagram which shows the modification which can be employ | adopted as protrusion of 1st Embodiment, and shows the thing of the rounded shape on the upper side of protrusion. It is a schematic diagram which shows the modification which can be employ | adopted as a processus | protrusion of 1st Embodiment, and shows the rectangular thing in which the cross section of processus | protrusion inclined. It is a schematic diagram which shows the modification which can be employ | adopted as a processus | protrusion of 1st Embodiment, and shows the processus | protrusion arrange | positioned along with the three width direction of a base material. It is a schematic diagram which shows the modification which can be employ | adopted as protrusion of 1st Embodiment, and shows the thing from which the dimension in alignment with the width direction of the base material of protrusion is different. It is a schematic diagram which shows the modification which can be employ | adopted as a processus | protrusion of 1st Embodiment, and shows what differs in arrangement | positioning of a processus | protrusion. It is a figure which shows the 1st manufacturing method of a slat. It is a figure which shows the 2nd manufacturing method of a slat. It is a figure which shows the 3rd manufacturing method of a slat. It is a figure which shows the 4th manufacturing method of a slat. It is a figure which shows the 5th manufacturing method of a slat. It is a figure which shows the 6th manufacturing method of a slat. It is a perspective view of the transfer roll metal mold | die used for the 6th manufacturing method of a slat. It is a perspective view of the transfer roll metallic mold of the modification which can be used for the 6th manufacturing method of a slat. It is a perspective view of the slat of 2nd Embodiment. It is the schematic diagram which looked at the slat of 3rd Embodiment from the left-right direction. It is the schematic diagram seen from the left-right direction of the state which laminated | stacked multiple slats of 3rd Embodiment. It is the elements on larger scale when the slat of 3rd Embodiment is seen from the left-right direction. It is a schematic diagram which shows the optical path of the light which injected into the slat of 3rd Embodiment. It is the schematic diagram which looked at the slat of 4th Embodiment from the left-right direction. It is the schematic diagram seen from the left-right direction in the case of laminating | stacking multiple slats of 4th Embodiment. It is a perspective view of the slat of 5th Embodiment. It is a perspective view at the time of laminating | stacking multiple slats of 5th Embodiment. It is a perspective view of the slat of 6th Embodiment. It is the side view which looked at the slat of 6th Embodiment from the left-right direction. It is a perspective view of the slat of 7th Embodiment. It is the side view which looked at the slat of 7th Embodiment from the left-right direction. It is a top view of the slat of the modification 1 of 7th Embodiment. It is a top view of the slat of the modification 2 of 7th Embodiment. It is the side view which looked at the slat of the modification 2 of 7th Embodiment from the left-right direction. It is a perspective view of the modification of 7th Embodiment, and shows the modification 3. FIG. It is a perspective view of the modification of 7th Embodiment, and shows the modification 4. FIG. It is a perspective view of the modification of 7th Embodiment, and shows the modification 5. FIG. It is a perspective view of the modification of 7th Embodiment, and shows the modification 6. FIG. It is a perspective view of the modification of 7th Embodiment, and shows the modification 7. FIG. It is a perspective view of the modification of 7th Embodiment, and shows the modification 8. FIG. It is the side view which looked at the slat of 8th Embodiment from the left-right direction. It is the perspective view which expanded the principal part of the blind carrying the slat of 8th Embodiment, and shows the state which the inclination angle of a slat is a 1st angle. It is the perspective view which expanded the principal part of the blind carrying the slat of 8th Embodiment, and shows the state which the inclination angle of a slat is a 2nd angle. The whole slat perspective view of a 9th embodiment. The 1st expansion perspective view of the extension direction both ends of the slat of 9th Embodiment. The 2nd expansion perspective view of the extension direction both ends of the slat of 9th Embodiment. The perspective view which shows a mode that multiple slats of 9th Embodiment were connected. The perspective view which shows the whole structure of the blind of 10th Embodiment. It is a perspective view which shows typically the slat of 10th Embodiment, and shows the state which the inclination angle of a slat is a 1st angle. It is a perspective view which shows typically the slat of 10th Embodiment, and shows the state which the inclination angle of a slat is a 2nd angle. FIG. 42 is a diagram showing a room model including a lighting device and an illumination dimming system, and is a cross-sectional view taken along line J-J ′ of FIG. 41. The top view which shows the ceiling of a room model. The graph which shows the relationship between the illumination intensity of the light (natural light) daylighted indoors by the lighting apparatus, and the illumination intensity (illumination dimming system) by an indoor lighting apparatus.

Embodiments of the present invention will be described below with reference to the drawings.
In each drawing used for the following description, the scale of each member is appropriately changed to make each member a recognizable size.

[First Embodiment]
First, for example, a blind (lighting device) 1 shown in FIG. 1 will be described as a first embodiment of the present invention.
FIG. 1 is a perspective view showing the appearance of the blind 1. In the following description, the positional relationship (vertical, left / right, front / rear) of the blind 1 is based on the positional relationship (up / down, left / right, front / rear) when the blind 1 is used. Also, the positional relationship of the blind 1 is assumed to coincide with the positional relationship with respect to the paper surface.

As shown in FIG. 1, the blind 1 mainly includes a plurality of slats 2 that are spaced apart from each other and arranged in parallel in the horizontal direction, and a support mechanism 3 that supports the plurality of slats 2 so that they can be suspended vertically. Blinds. The blind 1 supports a plurality of slats 2 to be movable up and down and supports a plurality of slats 2 to tilt.

The plurality of slats 2 are constituted by a daylighting unit 5 constituted by a plurality of daylighting slats (slats) 4 having a daylighting property, and a plurality of light-shielding slats (slats) 6 having a light shielding property, which are located below the daylighting unit 5 The light-shielding portion 7 is configured. In the following description, the daylighting slats 4 and the light shielding slats 6 are collectively treated as the slats 2 unless otherwise distinguished.

The light shielding slat 6 constituting the light shielding part 7 is composed of a long plate-like base material 11 having light shielding properties. The base material 11 may be any material that is generally used as a so-called blind slat, and examples thereof include metal, wood, and resin. Moreover, what coated the surface of the base material 11 etc. can be mentioned.

The daylighting slat 4 constituting the daylighting unit 5 emits light incident from the outdoor side toward the indoor ceiling. Thereby, indoor space can be illuminated brightly, without using illumination. The specific configuration of the daylighting unit 5 will be described in detail later.

The support mechanism 3 includes a plurality of ladder cords 12 arranged in parallel in the vertical direction (short direction of the plurality of slats 2), a fixing box 13 that supports upper end portions of the plurality of ladder cords 12, and a plurality of ladder cords 12. And an elevating bar 14 attached to the lower end.

2A and 2B are enlarged perspective views of the main part of the blind 1, FIG. 2A shows a state where the slats 2 are opened, and FIG. 2B shows a state where the slats 2 are closed. Show.

A pair of ladder cords 12 are arranged side by side on both the left and right sides of the center portion of the plurality of slats 2. Each ladder cord 12 includes a pair of front and rear vertical cords 15a and 15b arranged in parallel with each other, and a pair of upper and lower horizontal cords 16a and 16b spanned between the vertical cords 15a and 15b. 16a and 16b have the structure arrange | positioned along with the equal interval in the longitudinal direction (vertical direction) of the vertical cords 15a and 15b. Each slat 2 is arranged in a state of being inserted between each of the vertical cords 15a and 15b and the horizontal cords 16a and 16b.

As shown in FIG. 1, the fixed box 13 is located at the top of the plurality of slats 2 arranged in parallel to each other, and is arranged in parallel with the plurality of slats 2. On the other hand, the elevating bar 14 is located at the lowermost part of the plurality of slats 2 arranged in parallel to each other, and is arranged in parallel with the plurality of slats 2. The vertical cords 15 a and 15 b constituting each ladder cord 12 are suspended from the fixed box 13 while being pulled vertically downward by the weight of the elevating bar 14.

The support mechanism 3 includes an elevating operation unit 17 for elevating the plurality of slats 2 and a tilt operation unit 18 for tilting the plurality of slats 2.

The raising / lowering operation part 17 has the several raising / lowering code | cord | chord (code) 19, as shown in FIG.1 and FIG.2A, FIG.2B. The plurality of lifting / lowering cords 19 are arranged in parallel with the vertical cords 15a and 15b constituting the ladder cord 12, respectively. Further, the plurality of lift cords 19 are attached to the lift bar 14 at the lower ends thereof through the holes 20 formed in each slat 2.

Further, the upper and lower ends of the plurality of lifting cords 19 are drawn inside the fixed box 13 and drawn out from the window portion 21 provided on one side of the fixed box 13. The lifting / lowering cord 19 drawn out from the window portion 21 is connected to one end of the operation cord 22. The other end of the operation cord 22 is attached to one end of the lift bar 14.

In the lifting / lowering operation unit 17, the lifting / lowering cord 19 is pulled into the inside of the fixed box 13 by pulling the operation cord 22 from the state where the lifting / lowering bar 14 is located at the lowermost part. As a result, the plurality of slats 2 rise together with the lift bar 14 while overlapping the lift bar 14 in order from the lower side. The lifting / lowering cord 19 is fixed by a stopper (not shown) provided inside the window portion 21. Thereby, the raising / lowering bar 14 can be fixed in arbitrary height positions. On the contrary, the lifting bar 14 can be lowered by its own weight by releasing the fixing of the lifting cord 19 by the stopper. Thereby, the raising / lowering bar 14 can be located in the lowest part again.

As shown in FIG. 1, the tilting operation unit 18 has an operation lever 23 on one side of the fixed box 13. The operation lever 23 is attached to be rotatable about an axis. In the tilting operation unit 18, the vertical cords 15a and 15b constituting the ladder cord 12 shown in FIG. 2A can be moved up and down in opposite directions by rotating the operation lever 23 about the axis. Thereby, a plurality of slats 2 can be tilted while being synchronized with each other between a state where the slats 2 shown in FIG. 2A are opened and a state where the slats 2 shown in FIG. 2B are closed. .

(Daylighting slats)
FIG. 3 is a perspective view showing a schematic configuration of the daylighting slat 4.
The daylighting slat 4 is provided on a plate-like light-transmitting base material 41 having a first surface 41 a and a second surface 41 b and extending in the left-right direction, and a first surface 41 a of the base material 41. An optical functional layer (lighting layer) 42 and a pair of protrusions 43 provided on the first surface 41 a of the base material 41 are provided.

(Base material)
The base material 41 has a plate shape extending in the left-right direction as the longitudinal direction.
As the base material 41, for example, a light-transmitting base material made of a resin such as a thermoplastic polymer, a thermosetting resin, or a photopolymerizable resin is used. A light-transmitting substrate made of acrylic polymer, olefin polymer, vinyl polymer, cellulose polymer, amide polymer, fluorine polymer, urethane polymer, silicone polymer, imide polymer, or the like is used. Specifically, for example, triacetyl cellulose (TAC), polyethylene terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC), polyethylene naphthalate (PEN), polyethersulfone (PES), polyimide (PI) A light-transmitting plate material such as is preferably used. In addition, the base material 41 may be a glass base material. The thickness of the base material 41 is arbitrary. Also, a laminated structure in which a plurality of materials are laminated may be used.
The total light transmittance of the substrate 41 is preferably 90% or more as defined in JIS K7361-1.
Thereby, sufficient transparency can be obtained.

(Optical function layer)
FIG. 4 is an enlarged view when the daylighting slat 4 is viewed from the left-right direction.
As shown in FIG. 4, the optical functional layer 42 includes a plurality of convex structures 45. The plurality of convex structures 45 extend in a straight line parallel to the longitudinal direction (extending direction) of the base material 41. Further, the plurality of convex structures 45 are provided side by side in the short direction of the base material 41 (direction orthogonal to the extending direction). In other drawings, the uneven shape of the optical function layer 42 is not shown.

The convex structure 45 constitutes a prism body having a triangular cross section. Specifically, the convex structure 45 includes a first surface portion 45a facing the first surface 41a of the base material 41, and a second surface adjacent to the first surface portion 45a across the first corner portion 45d. Adjacent to the first surface portion 45a across the second corner portion 45e opposite to the first corner portion 45d and adjacent to the second surface portion 45b across the third corner portion 45f. And a third surface portion (reflection surface: side surface) 45c.

Since air (gap portion 46) exists between the plurality of convex structures 45, the second surface portion 45b and the third surface portion 45c are interfaces between the constituent material of the convex structure 45 and air. It becomes. The space between the plurality of convex structures 45 may be filled with another low refractive index material. However, the difference in refractive index at the interface between the inside and outside of the convex structure 45 is maximized when air is present rather than when any low refractive index material is present outside. Therefore, when air is present, the critical angle of the light totally reflected by the second surface portion 45b or the third surface portion 45c among the light incident on the convex structure 45 is the most according to Snell's law. Get smaller. Thereby, since the range of the incident angle of the light totally reflected by the second surface portion 45b or the third surface portion 45c becomes the widest, the light incident on the convex structure 45 is transferred to the other surface side of the base material 41. And can be guided efficiently. As a result, the loss of light incident on the convex structure 45 is suppressed, and the luminance of light emitted from the other surface of the base material 41 can be increased.

FIG. 5 is a schematic diagram showing an optical path of light incident on the daylighting slat 4.
As shown in FIG. 5, the convex structure 45 of the optical function layer 42 transmits light L incident on the one surface of each daylighting slat 4 from obliquely upward to the outside from the other surface of each daylighting slat 4. The light is emitted obliquely upward. The light L incident on each daylighting protrusion 9 from the second surface 45b of the convex structure 45 is totally reflected by the third surface 45c, and then is directed to the indoor ceiling as the light L toward the indoor ceiling. The light is emitted from the surface 41b. Thereby, the light L which entered the room through the window glass can be efficiently irradiated toward the ceiling. Therefore, the light reflected by the ceiling illuminates the room brightly over a wide area, instead of the illumination light. In this case, by turning off the indoor lighting equipment, an energy saving effect that saves energy consumed by the indoor lighting equipment during the day can be expected. That is, the optical functional layer 42 of the present embodiment functions as a daylighting layer.

The convex structure 45 is made of an organic material having optical transparency 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. The convex structure 45 is preferably 90% or more in accordance with K7361-1. Thereby, sufficient transparency can be obtained.

It is desirable that the refractive index of the base material 41 and the refractive index of the convex structure 45 be substantially equal.
The reason is that, for example, when the refractive index of the base material 41 and the refractive index of the convex structure 45 are significantly different, when light enters the base material 41 from the convex structure 45, these convex structure 45 Unnecessary light refraction or reflection may occur at the interface between the substrate 41 and the substrate 41. In this case, there is a possibility that problems such as failure to obtain desired lighting characteristics and a decrease in luminance may occur.

The convex structure 45 of the present embodiment can be formed on the base material 41 using, for example, a photolithography technique. In addition to the method using the photolithography technique, the convex structure 45 can be formed by a method such as a melt extrusion method, a mold extrusion method, or an imprint method. In methods such as the melt extrusion method and the mold extrusion method, the base material 41 and the convex structure 45 are integrally formed of the same resin.

Further, the convex structure 45 is not limited to the one in which the cross section in the direction orthogonal to the longitudinal direction is configured by the above-described prism body having a triangular cross section, for example, a convex structure 45A shown in FIG. 6A. In addition, it may be configured by a prism body having a right-angled triangular cross section, or may be configured by a prism body having a trapezoidal (rectangular) cross section like a convex structure 45B shown in FIG. 6B. The cross-sectional shape can be appropriately changed such as a pentagon or a hexagon. Furthermore, a convex structure 45C having a hexagonal cross section in a direction orthogonal to the longitudinal direction shown in FIG. 6C may be provided. In addition, as shown in FIG. 6D, a ridge structure 45 </ b> C may be provided on the second surface 41 b side of the base material 41.

The optical functional layer 42 of the present embodiment is a daylighting layer, and has a convex structure 45 extending in the left-right direction and a gap 46 provided between the convex structures 45, and has a prism structure, The case where the light reflected from the inner surface is reflected to the indoor ceiling side is illustrated. However, the optical functional layer 42 is not limited to such a case. For example, the optical functional layer 42 diffuses incident light to suppress glare light and emit light toward the indoor side to illuminate the room (for example, the second optical functional layer 242B in FIG. 21). It may be.

The optical function layer 42 may be a low reflection layer that suppresses reflection of incident light. The low-reflection layer is configured using a moth-eye structure that suppresses interface reflection by eliminating a sudden change in the refractive index of light with a fine weight structure of a visible light wavelength or less. Further, the low reflection layer may include, for example, an AR treatment film that has a multilayer film and optically reflects external light by interference. By adopting a low reflection layer as the optical function layer 42 of the daylighting slat 4, incident light is hardly reflected. Thereby, it is suppressed that a reflected image is reflected on the surface of the daylighting slat 4 (that is, the surface of the low reflection layer), and the distortion of the surface can be made inconspicuous.

(Projection)
The pair of protrusions 43 are located at both end portions in the width direction (short direction) of the first surface 41 a of the base material 41. The pair of protrusions 43 protrude from the first surface 41 a of the base material 41 in the thickness direction of the base material 41. The pair of protrusions 43 extend in a streak pattern along the extending direction of the base material 41.

FIG. 7 is a schematic view seen from the left-right direction when a plurality of daylighting slats 4 are stacked in the thickness direction of the base material 41. In FIG. 7 and subsequent figures, the prism structure of the convex structure 45 of the optical function layer 42 is not shown.
As shown in FIG. 7 (and FIG. 4), the height H of the protrusion 43 is larger than the height J of the convex structure 45 of the optical function layer 42. That is, the dimension H of the protrusion 43 along the thickness direction of the base material 41 is larger than the dimension J of the convex structure 45 along the thickness direction of the base material 41. Therefore, when the plurality of daylighting slats 4 are stacked, the projection 43 of the lower daylighting slat 4 comes into contact with the second surface 41b of the base material 41 of the upper daylighting slat 4, and the lower daylighting slat 4 protrudes. Contact between the structure 45 and the upper daylighting slat 4 is suppressed. Thereby, it is possible to prevent the optical functional layer 42 from being damaged. That is, even when the daylighting slats 4 are laminated, the blind 1 can be provided in which the optical function layer 42 is hardly damaged and the optical function is not impaired.

The protrusions 43 of the present embodiment are integrally formed of the same resin material together with the base material 41 by a method such as a melt extrusion method or a mold extrusion method. Further, the constituent material of the protrusion 43 may be the same as that of the optical function layer 42. However, when the protrusion 43 contacts the convex structure 45 of the optical function layer 42, the convex structure 45 is not damaged. Further, it may be an elastomer material or a material having a soft surface. Further, when there is a problem with the rigidity of the daylighting slat 4 when the base material 41 is thinly formed for weight reduction, the rigidity of the daylighting slat 4 is obtained by adopting a high-rigidity material such as a metal as the protrusion 43. May be increased.

As shown in FIGS. 2A and 2B, the protrusion 43 extending in the extending direction is provided with a gap portion 43 a that is partially missing. The gap 43a is disposed so as to overlap the lifting / lowering cord 19 and the ladder cord 12 when the blind 1 is viewed from the front. Since the lifting / lowering cord 19 is inserted through the hole 20 of the daylighting slat 4, the gap 43 a overlaps with the hole 20 when viewed from the direction orthogonal to the extending direction of the base material 41. In other words, the protrusion 43 is provided only at a position different from the hole 20 when viewed from the direction orthogonal to the extending direction of the base material 41. At the place where the lifting / lowering cord 19 and the ladder cord 12 are provided, the daylighting slats 4 are not easily brought into direct contact with each other because the horizontal cords 16a and 16b of the ladder cord 12 are interposed between the upper and lower daylighting slats 4. .
That is, since the optical function layer 42 is protected by the ladder cord 12 in the vicinity of the hole 20, damage to the optical function layer 42 is sufficiently suppressed even if the projection 43 is missing. Further, by providing the gap portion 43a, the projections 43 can be arranged only at necessary places, and the lightening slat 4 can be reduced in weight.

The protrusion 43 may be colored in a different color with respect to the base material 41. Since the optical functional layer 42 and the base material 41 are made of a light-transmitting material, only the protrusions 43 are lifted and visually recognized in the daylighting slats 4 by coloring the protrusions 43. Thereby, the designability of the blind 1 can be improved.

The protrusion 43 is not limited to the shape of the present embodiment, and various shapes can be adopted.
For example, a trapezoidal shape may be used when viewed from the left-right direction as in the projection 43A shown in FIG. 8A, or a triangle shape may be used in the projection 43B shown in FIG. 8B, and the projection 43C shown in FIG. 8C. The upper side may have a rounded shape. Moreover, it may be inclined and arranged so as to cover the optical functional layer 42 from both sides in the width direction of the base material 41 like a protrusion 43D shown in FIG. 8D. As shown in FIG. 8E, three protrusions 43E may be arranged side by side in the width direction, and like protrusions 43F shown in FIG. 8F, they may have different shapes on both sides in the width direction. Like the protrusion 43G shown in FIG. 4, it may be provided inside the width direction end.

(Production method)
Various embodiments of the daylighting slat 4 will be described with reference to FIGS.
FIG. 9 is a diagram showing a first manufacturing method.
According to the first manufacturing method, the base material 41 and the protrusions 43 are made of a resin material and are integrally formed by an extrusion method. Further, the daylighting slat 4 is manufactured by bonding and fixing the optical function layer 42 separately manufactured to the first surface 41 a of the base material 41.

FIG. 10 is a diagram showing a second manufacturing method.
According to the second manufacturing method, the base material 41 and the optical functional layer 42 are made of a resin material and are integrally formed by an extrusion method. Further, the daylighting slat 4 is manufactured by adhering and fixing the protrusion 43 to the first surface 41 a of the base material 41.

FIG. 11 is a diagram showing a third manufacturing method.
According to the third manufacturing method, after the optical functional layer 42 is formed on the base material 41 in advance, the daylighting slat 4 is manufactured by bending both sides in the width direction of the base material 41 toward the first surface 41a.

FIG. 12 is a diagram showing a fourth manufacturing method.
According to the fourth manufacturing method, after forming the optical functional layer 42 on the base material 41 in advance, the dispenser 49 is used to inject the resin material onto the first surface 41a of the base material 41, and the resin material The projection 43 is formed by curing, and the daylighting slat 4 is manufactured.

FIG. 13 is a diagram showing a fifth manufacturing method.
According to the fifth manufacturing method, after the optical functional layer 42 is formed on the base material 41 in advance, the base material 41 and the optical functional layer 42 are projected to the first surface 41a side of the base material 41 by punching. The protrusion 43 is formed. According to this manufacturing method, since a separate member for the protrusion 43 is not required, weight reduction can be realized. On the other hand, according to this manufacturing method, the optical function of a part of the optical function layer 42 deformed with the formation of the protrusions 43 is lowered.

FIG. 14 is a diagram showing a sixth manufacturing method.
The sixth manufacturing method is a method of forming the convex structure 45 and the protrusion 43 of the optical function layer 42 on the first surface 41 a of the base material 41.
First, the pair of rollers 60 and 60 are rotated to feed out the plate-like base material 41.
Next, the photo-curing resin 80 is applied to one surface (first surface 41 a) of the base material 41 by the resin coating device 61.
Next, the photocurable resin 80 is pressed against the transfer surface 62a of the rotating transfer roll mold 62, and the photocurable resin 80 is irradiated with light 63 such as ultraviolet rays. Thus, the convex structure 45 and the protrusion 43 are formed by transferring the concave and convex shape formed on the transfer surface 62a of the transfer roll mold 62 to the first surface 41a of the base material 41.
Next, the base material 41 is cut by the cutting device 64 to form the daylighting slat 4.

FIG. 15 is a perspective view of the transfer roll mold 62. The transfer surface 62 a of the transfer roll mold 62 includes a first concave groove 95 and a second concave groove 93. The first concave groove 95 is a groove corresponding to the convex structure 45, and a plurality of first concave grooves 95 are formed over the entire width of the transfer surface 62a. Further, the second concave groove 93 extends along the axial direction of the transfer roll mold 62 and is provided as a pair on the transfer surface 62a. On the transfer surface 62a, the first concave groove 95 and the second concave groove 93 extend in parallel. Therefore, by using the transfer roll mold 62, it is possible to form the daylighting slats 4 in which the convex structures 45 and the protrusions 43 extend in the same direction.

FIG. 16 is a perspective view of a modified transfer roll mold 62A that can be employed in the sixth manufacturing method. A first concave groove 95A and a second concave groove 93A that extend orthogonal to each other are formed on the transfer surface 62a of the transfer roll mold 62A. According to the transfer roll mold 62 </ b> A of this modification, a daylighting slat having a protrusion 43 orthogonal to the convex structure 45 can be formed.

[Second Embodiment]
Next, the daylighting slat 104 of 2nd Embodiment is demonstrated.
FIG. 17 is a perspective view of the daylighting slat 104.
The daylighting slat 104 of the second embodiment is mainly different from the daylighting slat 4 of the first embodiment in that it has a plurality of protrusions 143 arranged along the extending direction of the base material 41. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The daylighting slat 104 includes a plate-like light-transmitting base material 41, an optical functional layer (lighting layer) 42 provided on the first surface 41 a of the base material 41, and the first surface 41 a of the base material 41. A plurality of protrusions 143 provided.

The protrusions 143 are arranged at predetermined intervals along the extending direction of the base material 41 on both sides in the width direction of the first surface 41a of the base material 41, respectively. Each protrusion 143 has a substantially square shape when viewed from the thickness direction of the base material 41, and protrudes in the thickness direction of the base material 41.

Since the daylighting slats 104 are wound and stored via the ladder cord 12 (see FIGS. 2A and 2B), it is desirable to reduce the weight in order to lighten the operation of the ladder cord 12. According to this embodiment, the projection 143 is intermittently arranged with a predetermined interval, so that the daylighting slat 104 can be reduced in weight.

[Third Embodiment]
Next, the daylighting slat 204 of 3rd Embodiment is demonstrated.
FIG. 18 is a schematic view of the daylighting slat 204 viewed from the left-right direction. FIG. 19 is a schematic view of the plurality of daylighting slats 204 as viewed from the left-right direction in a state where the plurality of daylighting slats 204 are stacked in the thickness direction of the base material 41. In FIGS. 18 and 19, the detailed structures of the first and second optical functional layers 242A and 242B are not shown.

Compared with the daylighting slat 4 of the first embodiment, the daylighting slat 204 of the third embodiment includes the first optical function layer 242A and the second optical function layer 242A provided with the optical function layers 242 on both surfaces of the base material 41, respectively. The main difference is that the functional layer 242B is included. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The daylighting slat 204 includes a plate-like light-transmitting base material 41, a first optical functional layer 242A and a pair of protrusions 243 provided on the first surface 41a of the base material 41, and a second surface 41b. And a second optical function layer 242B provided.

FIG. 20 is a partially enlarged view of the daylighting slat 204 viewed from the left-right direction. FIG. 21 is a schematic diagram showing an optical path of light incident on the daylighting slat 204.
The first optical functional layer 242A of the present embodiment has the same configuration as the optical functional layer 42 (see FIG. 4) of the first embodiment and exhibits a daylighting function. The first optical functional layer (lighting layer) 242A is composed of a plurality of first convex structures 245 extending in a streak shape parallel to the longitudinal direction (extending direction) of the base material 41. The first convex structure 245 constitutes a prism body having a triangular cross section. Air (void portion 246) exists between the plurality of first convex structures 245.

As shown in FIG. 21, the second optical functional layer 242B of the present embodiment is a light diffusion layer that emits light to the indoor side and illuminates the room while suppressing the glare light by diffusing the incident light. . The second optical functional layer 242B is composed of a plurality of second convex structures 248 that extend in a streak shape parallel to the longitudinal direction (extending direction) of the base material 41 and constitute a lenticular lens structure. The plurality of second convex structures 248 are provided side by side in the short side direction of the base material 41 (direction orthogonal to the extending direction). The lens surface of the second convex structure 248 has a curvature in the vertical plane and does not have a curvature in the horizontal plane. That is, the second optical functional layer (light diffusion layer) 242B has anisotropy in light diffusion characteristics and is configured to exhibit strong light diffusion properties in the vertical direction.

In the present embodiment, the second optical function layer 242B is exemplified by a light diffusion layer that diffuses light in the vertical direction and suppresses glare light. However, the second optical function layer 242B exhibits an optical function. If it is a layer, it will not be restricted to this. For example, the second optical functional layer 242B may be a daylighting layer similar to the first optical functional layer 242A. The second optical functional layer 242B may be an anisotropic light diffusing layer that is strongly diffusible in the horizontal direction, and disperses particles having an aspect ratio of about 5 to 500 in order to scatter light. It may be an isotropic light diffusion layer having an isotropic scattering structure. In addition, the second optical functional layer 242B may be a low reflection layer that suppresses reflection of incident light.

The pair of protrusions 243 are located at both end portions in the width direction (short direction) of the first surface 41a of the base material 41, as in the first embodiment. The pair of protrusions 243 protrudes from the first surface 41 a of the base material 41 in the thickness direction of the base material 41. The pair of protrusions 243 extend in a streak pattern along the extending direction of the base material 41.

19 (and FIG. 20), the height H of the protrusion 243 is greater than the sum of the height J1 of the first convex structure 245 and the height J2 of the second convex structure 248. That is, the dimension of the protrusion 243 along the thickness direction of the base material 41 is the dimension of the convex structure along the thickness direction of the base material 41 (that is, the height J1 and the second height of the first convex structure 245). (The sum of the heights J2 of the convex structures 248). Accordingly, when the plurality of daylighting slats 204 are stacked, the projection 243 of the lower daylighting slat 204 comes into contact with the second surface 41b of the base material 41 of the upper daylighting slat 204, and the first optical functional layer 242A. And the second optical functional layer 242B do not contact each other. Thereby, it can suppress that a damage | wound arises in 1st optical function layer 242A and 2nd optical function layer 242B.

[Fourth Embodiment]
Next, the daylighting slat 304 of 4th Embodiment is demonstrated.
FIG. 22 is a schematic view of the daylighting slat 304 viewed from the left-right direction. FIG. 23 is a schematic view seen from the left-right direction when a plurality of daylighting slats 304 are stacked in the thickness direction of the base material 41. 22 and FIG. 23, the detailed structures of the first and second optical functional layers 242A and 242B are not shown.

The daylighting slat 304 of the present embodiment is similar to the third embodiment in that the optical functional layer 242 includes a first optical functional layer 242A and a second optical functional layer 242B provided on both surfaces of the substrate 41, respectively. is doing. On the other hand, the daylighting slat 304 of this embodiment is different from the third embodiment in that the protrusion 343 includes a first protrusion 343A and a second protrusion 343B provided on both surfaces of the base material 41, respectively. Mainly different. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The daylighting slat 304 includes a plate-like light-transmitting base material 41, a first optical functional layer 242A and a pair of first protrusions 343A provided on the first surface 41a of the base material 41, and a second A second optical function layer 242B provided on the surface 41b and a pair of second protrusions 343B.

The pair of first protrusions 343 </ b> A and the pair of second protrusions 343 </ b> B are located at both ends in the width direction (short direction) of the base material 41 on the first surface 41 a and the second surface 41 b. The pair of first protrusions 343A and the pair of second protrusions 343B protrude from the first surface 41a and the second surface 41b in the thickness direction of the substrate 41, respectively. The pair of first protrusions 343 </ b> A and the pair of second protrusions 343 </ b> B extend in a streak pattern along the extending direction of the base material 41.
The first protrusion 343A and the second protrusion 343B overlap each other when viewed from the thickness direction of the base material 41.

As shown in FIG. 22, the height H1 of the first protrusion 343A is larger than the height J1 of the first convex structure 245 of the first optical functional layer 242A. Similarly, the height H2 of the second protrusion 343B is larger than the height J2 of the second convex structure 248 of the second optical function layer 242B. When a plurality of daylighting slats 304 are stacked, the first protrusion 343A and the second protrusion 343B may contact each other, and the first optical function layer 242A and the second optical function layer 242B may contact each other. Absent. Thereby, it can suppress that a damage | wound arises in 1st optical function layer 242A and 2nd optical function layer 242B.
In order to suppress contact between the first optical functional layer 242A and the second optical functional layer 242B, the dimension of the protrusion 343 along the thickness direction of the base material 41 (that is, the height of the first protrusion 343A) The sum of the height H1 and the height H2 of the second protrusion 343B is the dimension of the convex structure along the thickness direction of the base material 41 (that is, the height J1 and the second height of the first convex structure 245). (The sum of the heights J2 of the convex structures 248).

[Fifth Embodiment]
Next, the daylighting slat 404 of 5th Embodiment is demonstrated.
FIG. 24 is a perspective view of the daylighting slat 404. FIG. 25 is a perspective view of a state in which a plurality of daylighting slats 404 are stacked in the thickness direction of the base material 41.

The daylighting slat 404 of this embodiment has a protrusion on the surface (second surface 41b) opposite to the surface (first surface 41a) on which the protrusion 443 of the base material 41 is provided compared to the first embodiment. The main difference is that a fitting convex portion 444 fitted between 443 is provided. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The daylighting slat 404 is provided on the plate-like light-transmitting base material 41, the optical functional layer 42 and the plurality of protrusions 443 provided on the first surface 41a of the base material 41, and the second surface 41b. A plurality of fitting protrusions 444.

The plurality of protrusions 443 are arranged at predetermined intervals along the extending direction of the base material 41 on both sides in the width direction of the first surface 41 a of the base material 41. A gap 443a is provided between the plurality of protrusions 443. Each protrusion 443 has a rectangular shape in plan view.

The plurality of fitting protrusions 444 are arranged along the extending direction of the base material 41 in the width direction amount of the second surface 41 b of the base material 41. The fitting convex portion 444 is disposed so as to overlap with the gap portion 443 a located between the plurality of protrusions 443 when viewed from the thickness direction of the base material 41. That is, the fitting convex portion 444 is located between the protrusions 443 adjacent to each other when viewed from the thickness direction of the base material 41. Therefore, according to the present embodiment, when a plurality of daylighting slats 404 are stacked, the fitting convex portion 444 is fitted into the gap portion 443a, and the stacked daylighting slats 404 are not easily displaced in the length direction of the base material 41. (See FIG. 25).
Note that the height of the fitting convex portion 444 (that is, the dimension along the thickness direction of the base material 41) is the same as or smaller than the height of the protrusion 443. Thus, by making the height of the protrusion 443 larger than the height of the convex structure 45 of the optical function layer 42, the optical function layer 42 can be protected without depending on the height of the fitting convex portion 444. it can.

[Sixth Embodiment]
Next, the daylighting slat 504 of the sixth embodiment will be described.
FIG. 26 is a perspective view of the daylighting slat 504. FIG. 27 is a side view of the daylighting slat 504 viewed from the left-right direction.

The daylighting slat 504 of this embodiment differs from the first embodiment in the configuration of the protrusion 543. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The daylighting slats 504 include a plate-like light-transmitting base material 41, an optical functional layer 42 provided on the first surface 41 a of the base material 41, and a plurality of light-emitting slats 504 provided on the first surface 41 a of the base material 41. Projection 543.

The plurality of protrusions 543 are arranged in a lattice shape (square lattice shape) on the first surface 41 a of the base material 41. The plurality of protrusions 543 are arranged side by side at predetermined intervals in the extending direction of the base material 41 and the direction orthogonal to the extending direction of the base material 41. Each protrusion 543 has a dome shape that swells from the first surface 41 a of the base material 41 along the thickness direction of the base material 41. The protrusion 543 can be formed, for example, by dropping an uncured and highly viscous resin material on the upper side of the optical functional layer 42 provided on the base material 41 and then curing the resin material (see FIG. 12).

The protrusion 543 has a height H (a dimension along the thickness direction of the base material 41) larger than a height J (a dimension along the thickness direction of the base material 41) of the convex structure 45 of the optical function layer 42. Accordingly, even when the daylighting slats 504 are stacked one above the other, the optical functional layer 42 can be protected because the protrusions 543 come into contact with the second surface 41 b of the base material 41. In addition, although the protrusion 543 of this embodiment is formed on the optical function layer 42, the dimension along the thickness direction of the base material 41 of the protrusion 543 is the protrusion from the first surface 41a of the base material 41. It means the distance to the vertex of 543.

According to the present embodiment, since the protrusions 543 are uniformly distributed on the first surface 41a of the base material 41, the optical function layer 42 can be obtained even when the stacked slats are displaced from each other. Easy to protect effectively.

[Seventh Embodiment]
Next, a daylighting slat 604 according to a seventh embodiment will be described.
FIG. 28 is a perspective view of the daylighting slat 604. FIG. 29 is a side view of the daylighting slat 604 viewed from the left-right direction.

The daylighting slat 604 of this embodiment is different in the arrangement of the protrusions 643 compared to the sixth embodiment. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The daylighting slats 604 include a plate-like light-transmitting base material 41, an optical functional layer 42 provided on the first surface 41 a of the base material 41, and a plurality of provided on the first surface 41 a of the base material 41. Projections 643.

The plurality of protrusions 643 are arranged on the first surface 41 a of the base material 41 in a lattice shape (square lattice shape) that is inclined with respect to the extending direction of the base material 41. Each protrusion 643 has a dome shape that swells from the first surface 41 a of the base material 41 along the thickness direction of the base material 41.

According to the present embodiment, the protrusions 643 are arranged in a lattice array that is inclined with respect to the extending direction of the base material 41, so that the plurality of protrusions 643 are formed as shown in FIG. 29. It is arrange | positioned without a gap seeing from the extending direction. When the plurality of daylighting slats 604 are stacked in the vertical direction, the daylighting slats 604 are easily displaced in the short direction of the base material 41. Therefore, if there is a gap between the protrusions when viewed from the extending direction of the base material 41, the upper base material 41 may tilt and contact the lower optical functional layer 42 in the gap (see two in FIG. 27). (See dotted line). On the other hand, according to the present embodiment, the plurality of protrusions 643 are arranged without gaps when viewed from the extending direction of the base material 41, so that the upper daylighting slat 604 is in the short direction of the base material 41. Even if the optical function layer 42 is further inclined, the optical functional layer 42 can be effectively protected.

(Modification 1 of 7th Embodiment)
FIG. 30 is a plan view of a daylighting slat 604A according to Modification 1 of the seventh embodiment. The daylighting slat 604A is different from the seventh embodiment in the arrangement of the protrusions 643A.

The protrusions 643A are arranged on the triangular lattice or the hexagonal lattice on the first surface 41a of the base member 41. Each triangular lattice and each hexagonal lattice are arranged to be inclined with respect to the extending direction of the base material 41. Similar to the seventh embodiment, the plurality of protrusions 643 </ b> A are arranged without gaps when viewed from the extending direction of the base material 41. As shown in the present modification, the arrangement of the protrusions 643A is not limited to being arranged in the form of a square lattice, and the same effects as those in the seventh embodiment described above can be achieved even in other arrangements.

(Modification 2 of 7th Embodiment)
FIG. 31 is a plan view of a daylighting slat 604B of Modification 2 of the seventh embodiment. FIG. 32 is a side view of the daylighting slat 604B viewed from the left-right direction. The daylighting slat 604B differs from the seventh embodiment in the arrangement of the protrusions 643B.

The protrusions 643B are irregularly arranged on the first surface 41a of the substrate 41. Further, as shown in FIG. 32, the plurality of protrusions 643 </ b> B are arranged without gaps when viewed from the extending direction of the base material 41. Thereby, there can exist an effect similar to the above-mentioned 7th Embodiment.

(Modifications 3 to 8 of the seventh embodiment)
33A to 33F are perspective views showing daylighting slats 604C to 60H of Modifications 3 to 8 of the seventh embodiment, respectively.
That is, the following arrangement of the protrusions 643C to 643H can be adopted for the protrusion 643 of the seventh embodiment.
Like protrusions 643C shown in FIG. 33A, the protrusions 643C may be linearly arranged in an oblique direction with respect to the extending direction of the base material 41.
33B has an elliptical shape with the short axis direction of the base material 41 as the major axis, and the protrusions 643D are linearly arranged obliquely with respect to the extending direction of the base material 41. Also good.
A plurality of protrusions 643 </ b> E shown in FIG. 33C may be arranged at regular intervals extending in a straight line in the short direction of the base material 41.
A plurality of protrusions 643 </ b> F shown in FIG. 33D may be arranged at regular intervals extending in a streak direction obliquely with respect to the extending direction of the base material 41.
The protrusion 643G illustrated in FIG. 33E may extend while meandering linearly with respect to the extending direction of the base material 41.
Furthermore, the projection 643H shown in FIG. 33F may extend while curving and meandering in the extending direction of the base material 41.
The protrusions 643C to 643H described above are arranged without a gap when viewed from the extending direction of the base material 41. Therefore, the same effects as those of the seventh embodiment described above can be achieved.
Further, as in the protrusions 643D to 643H of the modification examples 4 to 8 (FIGS. 33B to 33F), when viewed from the thickness direction of the base material 41, the length is long in the direction orthogonal to the extending direction of the base material 41. By having such a shape, the gap seen from the extending direction of the base material 41 is made small (or no gap), and the protrusions 643D to 643H can be easily arranged.

[Eighth Embodiment]
Next, a daylighting slat 704 according to an eighth embodiment will be described.
FIG. 34 is a side view of the daylighting slat 704 viewed from the left-right direction. 35A and 35B are enlarged perspective views of the main part of the blind equipped with the daylighting slats 704. FIG. 35A shows a state in which the daylighting slats 704 are opened. FIG. 35B shows each daylighting. The state between the slats 704 is shown. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 35A and 35B, the daylighting slats 704 are disposed between the plurality of ladder cords 12 arranged in parallel. Each ladder cord 12 includes a pair of front and rear vertical cords 15a and 15b arranged in parallel with each other, and a pair of upper and lower horizontal cords 16a and 16b spanned between the vertical cords 15a and 15b. 16a and 16b have the structure arrange | positioned along with the equal interval in the longitudinal direction (vertical direction) of the vertical cords 15a and 15b. The daylighting slats 704 are arranged in a state of being inserted between the vertical cords 15a and 15b and the horizontal cords 16a and 16b.

As shown in FIG. 34, the daylighting slat 704 includes a plate-like light-transmitting base material 741 and first and second optical functional layers 742A and 742A provided in different regions of the first surface 741a of the base material 741. Optical functional layer 742B.

The base material 741 has a shape bent along a reference line L parallel to the extending direction. The base material 741 is divided into a first region 751 and a second region 752 across the reference line L on the first surface 741a.
The first surface 741a of the base material 741 is provided with first protrusions 743A that protrude in the thickness direction of the base material 741 at both ends in the width direction. The first surface 741a of the base 741 is provided with a second protrusion 743B that extends along the reference line L and protrudes in the thickness direction of the base 741.

In the first region 751 of the substrate 741, a first optical functional layer 742A is provided between the first protrusion 743A and the second protrusion 743B. In the second region 752 of the substrate 741, the first optical functional layer 742A is provided between the first protrusion 743A and the second protrusion 743B.

The first optical functional layer 742A is, for example, a daylighting layer having a configuration similar to that of the first optical functional layer 242A in FIG. The second optical function layer 742B is a light diffusion layer having the same configuration as the second optical function layer 242B of FIG. 21, for example. In FIG. 34, detailed illustration of the convex structures included in each of the first optical functional layer 742A and the second optical functional layer 742B is omitted.

The height of the convex structure (detailed illustration is omitted) of the first optical functional layer 742A is smaller than the height of the first protrusion 743A and the second protrusion 743B. Accordingly, in the first region 751, the first optical functional layer 742A is positioned below (on the base material 741 side) the straight line K1 that connects the first protrusion 743A and the second protrusion 743B. Similarly, the height of the convex structure (detailed illustration is omitted) of the second optical function layer 742B is smaller than the height of the first protrusion 743A and the second protrusion 743B. Accordingly, in the second region 752, the second optical functional layer 742B is located below (on the base material 741 side) the straight line K2 connecting the first protrusion 743A and the second protrusion 743B. According to the present embodiment, when a plurality of daylighting slats 704 are stacked, contact between the first optical function layer 742A and the second optical function layer 742B and the upper daylighting slat 704 is suppressed.

According to the present embodiment, even if the optical function of the blind is enhanced by the daylighting slat 704 using the base material 741 bent along the reference line L parallel to the extending direction, the first optical The functional layer 742A and the second optical functional layer 742B can be protected.
The daylighting slat 704 of the present embodiment includes both the first optical function layer 742A and the second optical function layer 742B, but either the first optical function layer 742A or the second optical function layer 742B. The structure provided with one side may be sufficient.

[Ninth Embodiment]
Next, a daylighting slat 804 according to a ninth embodiment will be described.
36A is a perspective view of the daylighting slat 804, and FIGS. 36B and 36C are enlarged perspective views of both ends of the daylighting slat 804 in the extending direction.

The daylighting slat 804 of this embodiment is mainly different from the first embodiment in that convex portions 855 and concave portions 856 that can be fitted to each other are provided at both ends in the extending direction of the base material 841. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The daylighting slat 804 includes a plate-like light-transmitting base material 841, an optical functional layer 42 provided on the first surface 841 a of the base material 841, and a protrusion provided on the first surface 841 a of the base material 841. 843.

The protrusion 843 is formed in a frame shape so as to surround the periphery of the optical function layer 42. The height of the protrusion 843 is higher than the convex structure 45 of the optical function layer 42, and protects the optical function layer 42 when the daylighting slats 804 are stacked.

The base material 841 has a plate shape extending in the left-right direction as the longitudinal direction. On one end face in the extending direction of the base material 841, a convex portion 855 extending along the short side direction of the base material 841 is provided. Further, a concave portion 856 extending along the short direction of the base material 841 is provided on the other end surface in the extending direction of the base material 841.

FIG. 37 is a perspective view showing a state in which the daylighting slats 804 of the present embodiment are arranged in the horizontal direction, and the convex portion 855 and the concave portion 856 on the end face are fitted. As shown in FIG. 37, the convex portion 855 and the concave portion 856 of the daylighting slats 804 adjacent to each other are fitted to each other. Accordingly, the plurality of daylighting slats 804 are connected to each other to form one slat extending in the extending direction. That is, according to the daylighting slat 804 of the present embodiment, the length in the extending direction can be freely adjusted according to the size of the installation target window. Caps may be attached to protect the convex portions 855 and the concave portions 856 located at both ends of a connecting body in which a plurality of daylighting slats 804 are connected in the horizontal direction. Further, in the present embodiment, the case where the fitting structure is adopted for the flat base material 841 is described as an example, but the above-described fitting is performed on the base material bent along the reference line parallel to the extending direction. A combined structure may be adopted.

[Tenth embodiment]
Next, a blind (lighting device) 901 of the tenth embodiment will be described. FIG. 38 is a perspective view showing the overall configuration of the blind 901. The blind 901 is a vertical blind. That is, it differs from the blind 1 of the first embodiment in that each slat is suspended in the vertical direction.

The blind 901 includes a rail portion 913 that is positioned above the window and extends in the horizontal direction, and a plurality of strip-shaped daylighting slats 904 that are suspended from the rail portion 913 and arranged in the horizontal direction. Further, the rail portion 913 has a tilting mechanism (not shown) inside, and tilts the daylighting slat 904.

39A and 39B are perspective views schematically showing a plurality of daylighting slats 904 of the blind 901. FIG.
The daylighting slat 904 of this embodiment is divided into a light shielding area 904a and an optical function area 904b. The light shielding area 904a is located on the lower side from the middle in the vertical direction of the daylighting slat 904, and the optical function area 904b is located on the upper side from the middle in the vertical direction of the daylighting slat 904. In the light shielding area 904a, the daylighting slat 904 blocks light incident from outside the room and prevents it from entering the indoor side, and in the optical function area 904b, the light entering from the outdoor side is emitted toward the indoor ceiling.

The daylighting slat 904 has a first surface 941a and a second surface 941b, a plate-like light-transmitting base material 941 extending in the vertical direction, and a first surface in the optical function region 904b of the base material 941. An optical function layer (lighting layer) 942 provided on 941a, and a pair of protrusions 943 provided on the first surface 941a of the base 941. The daylighting slat 904 has a rotating shaft 950 that is movable so that one surface (first surface 941a) of the base 941 follows the movement of the sun and faces the sun. The daylighting slat 904 is configured to be rotatable about a rotation axis 950.

The base 941 has a light-transmitting property suppressed by being coated in the light shielding region 904a. Further, the base 941 may be formed of a member made of a light shielding material in the light shielding region 904a and a member made of a light transmissive material in the optical function region 904b.

The optical functional layer 942 includes a plurality of convex structures 945 extending in a streak shape in a direction orthogonal to the longitudinal direction (extending direction) of the base 941. The optical functional layer 942 has the same configuration as, for example, the first optical functional layer (lighting layer) 242A or the second optical functional layer (light diffusion layer) 242B in FIG.

The pair of protrusions 943 are arranged vertically on the first surface 941a of the base 941 so as to sandwich the optical function region 904b. The protrusion 943 extends in a streak shape along a direction orthogonal to the base 941. The protrusion 943 protrudes in the thickness direction of the substrate 941. The height of the protrusion 943 is larger than the height of the convex structure 945 of the optical function layer 942. Accordingly, even when the plurality of daylighting slats 904 are brought into contact with each other by being bundled in the horizontal direction, it is possible to suppress the protrusion 943 from being damaged in the optical functional layer 942.

Furthermore, according to the present embodiment, the protrusion 943 extends in a streak shape in a direction perpendicular to the extending direction of the base 941 (short direction of the base 941). That is, the protrusions 943 are arranged without gaps when viewed from the extending direction of the base 941. Thereby, even if the daylighting slats 904 overlapped in the horizontal direction are shifted in the short direction of the base 941 and further tilted, the optical functional layer 942 can be effectively protected.

[Lighting system]
40 is a view showing a room model including a daylighting device (blind) and a daylighting system, and is a cross-sectional view taken along the line JJ ′ of FIG. FIG. 41 is a plan view showing the ceiling of the room model 2000. FIG.

In the room model 2000, the ceiling material constituting the ceiling 2003a of the room 2003 into which external light is introduced may have high light reflectivity. As shown in FIGS. 40 and 41, a light-reflective ceiling material 2003A is installed on the ceiling 2003a of the room 2003 as a light-reflective ceiling material. The light-reflective ceiling material 2003A is intended to promote the introduction of outside light from the daylighting device 2010 installed in the window 2002 into the interior of the room, and is installed on the ceiling 2003a near the window. Yes. Specifically, it is installed in a predetermined area E (an area about 3 m from the window 2002) of the ceiling 2003a.

As described above, the light-reflective ceiling material 2003A is configured to transmit 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. Efficiently leads to the back. The external light introduced from the lighting device 2010 toward the indoor ceiling 2003a is reflected by the light-reflective ceiling material 2003A and changes its direction to illuminate the desk surface 2005a of the desk 2005 placed in the interior of the room. The effect of brightening the desk top surface 2005a is exhibited.

The light-reflective ceiling material 2003A may be diffusely reflective or specularly reflective, but has the effect of brightening the desk top surface 2005a of the desk 2005 placed in the interior of the room, and is in the room. In order to achieve both effects of suppressing glare light that is unpleasant for humans, it is preferable that the characteristics of the two are appropriately mixed.

As described above, most of the light introduced into the room by the daylighting apparatus 2010 is directed to the ceiling near the window 2002, but the amount of light in the vicinity of the window 2002 is often sufficient. Therefore, by using together the light-reflective ceiling material 2003A as described above, the light incident on the ceiling (region E) in the vicinity of the window can be distributed toward the back of the room where the amount of light is small compared to the window.

For example, the light-reflective ceiling material 2003A is formed by embossing a metal plate such as aluminum with unevenness of about several tens of microns, or depositing a metal thin film such as aluminum on the surface of a resin substrate on which similar unevenness is formed. Or can be made. Or the unevenness | corrugation formed by embossing may be formed in the curved surface of a larger period.

Furthermore, by appropriately changing the emboss shape formed on the light-reflective ceiling material 2003A, it is possible to control the light distribution characteristics and the light distribution in the room. For example, when embossing is performed in a stripe shape extending toward the back of the room, the light reflected by the light-reflective ceiling material 2003A is in the left-right direction of the window 2002 (direction intersecting the longitudinal direction of the unevenness). spread. When the size and direction of the window 2002 in the room 2003 are limited, the light is reflected in the horizontal direction by the light-reflective ceiling material 2003A and the interior of the room 2002 is moved to the back of the room. It can be reflected toward.

The daylighting apparatus 2010 is used as a part of the daylighting system in the room 2003. The daylighting system includes, for example, a daylighting device 2010, a plurality of indoor lighting devices 2007, a solar radiation adjusting device 2008 installed in a window, a control system thereof, and a light-reflective ceiling material 2003A installed in a ceiling 2003a. It is comprised from the structural member of the whole room containing.

In the window 2002 of the room 2003, a lighting 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 adjustment device 2008, but this is not a limitation.

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

As shown in FIGS. 40 and 41, for example, the left-right direction of the length _{L 1} is 18m window 2002, the depth direction of the length _{L 2} of the room 2003 indicates ceiling 2003a office 9m. Here, the indoor lighting devices 2007 are arranged in a grid pattern with an interval P of 1.8 m in the lateral direction and the depth direction of the ceiling 2003a. More specifically, 50 indoor lighting devices 2007 are arranged in 10 rows × 5 columns.

The indoor lighting device 2007 includes an indoor lighting fixture 2007a, a brightness detection unit 2007b, and a control unit 2007c. The indoor lighting fixture 2007a is configured by integrating the brightness detection unit 2007b and the control unit 2007c. It is.

The indoor lighting device 2007 may include a plurality of indoor lighting fixtures 2007a and a plurality of brightness detection units 2007b. However, one brightness detector 2007b is provided for each indoor lighting device 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 indoors.

One control unit 2007c provided for each room lighting device 2007 is connected to each other. Each indoor lighting device 2007 is configured such that the illuminance of the desk top surface 2005a detected by each brightness detection unit 2007b becomes a constant target illuminance L ₀ (for example, average illuminance: 750 lx) by the control units 2007c connected to each other. The feedback control is performed to adjust the light output of the LED lamp of each indoor lighting fixture 2007a.

FIG. 42 is a graph showing the relationship between the illuminance of light (natural light) taken indoors by the daylighting device and the illuminance (daylighting system) by the indoor lighting device. In FIG. 42, the vertical axis represents the illuminance (lx) on the desk surface, and the horizontal axis represents the distance (m) from the window. Moreover, the broken line in the figure indicates the target illuminance in the room. (●: Illuminance by lighting device, △: Illuminance by indoor lighting device, ◇: Total illumination)

As shown in FIG. 42, the illuminance on the desk surface caused by the light collected by the lighting device 2010 is brighter in the vicinity of the window, and the effect becomes smaller as the distance from the window increases. In a room to which the daylighting device 2010 is applied, such an illuminance distribution in the back direction of the room is generated by natural daylighting from a window in the daytime. Therefore, the daylighting device 2010 is used in combination with the indoor lighting device 2007 that compensates for the illuminance distribution in the room. The indoor lighting device 2007 installed on the indoor ceiling detects the average illuminance below each device by the brightness detection unit 2007b, and is dimmed and controlled so that the desk surface illuminance of the entire room becomes a constant target illuminance L0. Lights up. Therefore, the S1 and S2 rows installed in the vicinity of the window are hardly lit, and are lit while increasing the output toward the back of the room with the S3, S4, and S5 rows. As a result, the desk surface of the room is illuminated by the sum of the illuminance by natural lighting and the illumination by the interior lighting device 2007, and the illuminance of the desk surface is 750 lx (“JIS Z9110 illumination” which is sufficient for work throughout the room. "Recommended maintenance illuminance in the office of" General "" can be realized.

As described above, by using the daylighting device 2010 and the daylighting system (indoor lighting device 2007) in combination, it becomes possible to deliver light to the back of the room, and the brightness of the room can be further improved. At the same time, the illuminance on the desk surface, which is sufficient for work throughout the room, can be secured. Therefore, a more stable and bright light environment can be obtained without being affected by the season or weather.

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, and of course, the technical scope of the present invention is also possible. It is understood that it belongs to. You may combine the structure of each embodiment suitably.

In the above-described embodiment, the case where the optical function layer is a daylighting layer, a light diffusion layer, and a low reflection layer has been described as an example. However, the optical function layer has some optical function utilizing the characteristics of light. Any structure may be used as long as the layer exhibits the following.

One embodiment of the present invention can be applied to slats and blinds that need to suppress damage to the optical functional layer.

1,901 ... Blind (lighting device), 2,4,6,104,204,304,404,504,604A, 604B, 604C, 704,804,904 ... Lighting slat (slat) 11,43,741, 841, 941 ... Base material, 19 ... Lifting code (code), 20 ... Hole, 42, 242, 242A, 242B, 742A, 742B, 941, 942 ... Optical functional layer, 43, 43A, 43B, 43C, 43D, 43E, 43F, 43G, 143, 243, 343, 443, 543, 643, 643C, 643D, 643E, 643F, 643G, 643H, 743A, 743B, 843, 943... Projection, 45, 45A, 45B, 45C, 145 245, 248, 945 ... convex structure, 444 ... fitting convex part, 855 ... convex part, 856 ... concave part

Claims (12)

A plate-like light-transmitting substrate extending in one direction;
An optical functional layer comprising a plurality of convex structures and provided on at least one surface of the substrate;
A plurality of protrusions provided on at least one surface of the base material,
A size of the projection along the thickness direction of the base material is larger than a size of the convex structure along the thickness direction of the base material. The optical functional layer includes a first optical functional layer and a second optical functional layer respectively provided on both surfaces of the substrate,
The dimension of the convex structure along the thickness direction of the base material is such that the height of the convex structure of the first optical functional layer and the height of the convex structure of the second optical functional layer. Is the sum of
The slat according to claim 1. The plurality of protrusions include a plurality of first protrusions and a plurality of second protrusions respectively provided on both surfaces of the base material.
The first protrusion and the second protrusion are arranged at overlapping positions when viewed from the thickness direction of the base material,
The dimension of the protrusion along the thickness direction of the substrate is the sum of the height of the first protrusion and the height of the second protrusion.
The slat according to claim 1 or 2. A fitting convex portion provided on the surface opposite to the surface on which the protrusion is provided,
The fitting convex portion is located between the protrusions adjacent to each other when viewed from the thickness direction of the base material.
The slat according to any one of claims 1 to 3. The plurality of protrusions are arranged without gaps when viewed from the extending direction of the base material,
The slat according to any one of claims 1 to 4. The base is provided with a hole through which the cord is inserted,
The protrusion is provided at a position different from the hole as seen from the direction orthogonal to the extending direction of the base material.
The slat according to any one of claims 1 to 5. The base material is bent along a reference line parallel to the extending direction;
The slat according to any one of claims 1 to 6. The base has a first plate located on one side with respect to the reference line and a second plate located on the other side,
The optical functional layer and the protrusion are provided on either one or both of the first plate and the second plate,
The slat according to claim 7. The protrusion has an elongated shape in a direction orthogonal to the extending direction of the base material as seen from the thickness direction of the base material.
The slat according to any one of claims 1 to 8. At both ends in the extending direction of the base material, a convex portion and a concave portion that can be fitted to each other are provided, respectively.
The slat according to any one of claims 1 to 9. The protrusions are colored,
The slat according to any one of claims 1 to 10. A blind comprising a plurality of the slats according to any one of claims 1 to 11.

Images