JP2021057132A - Light collection structure - Google Patents

Abstract

To provide a light collection structure capable of taking sunlight into a room with a light shelf to increase illuminance in the room, and capable of suppressing the reverberation of sound in the room.SOLUTION: A light collection structure 10 comprises: a light collection window 20 provided on an outer wall 2 of a building 1; a light shelf 30 that is arranged at a position opposite to the light collection window 20, and reflects sunlight L toward a ceiling surface 12a of an indoor RI; and a sound absorbing material 40A arranged in a ceiling area 12b that the sunlight L reflected by the light shelf 30 reaches. The sound absorbing material 40A comprises first inclined portions 43a to 43c having first inclined surfaces 41a to 41c inclined downward on the indoor RI side so as to reflect the sunlight L toward the indoor RI side. The thickness of the first inclined portions 43a to 43c increases from the indoor RI side to an outdoor RO side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a daylighting structure with a light shelf.

Conventionally, a daylighting structure provided with a light shelf has been adopted in order to allow sunlight to reach the interior of the room (see, for example, Patent Document 1). The light shelf is arranged along the daylighting window and reflects the sunlight incident from above toward the ceiling surface of the room. The sunlight reflected from the light shelf is further reflected on the ceiling surface, so that the sunlight can penetrate deep into the room.

Japanese Unexamined Patent Publication No. 2015-88342

However, when a light shelf as shown in Patent Document 1 is installed, the sunlight reflected by the light shelf is further reflected by the ceiling surface, but the sound absorption performance for the ceiling including the ceiling surface is not considered. Sound easily reverberates indoors. In particular, such a ceiling surface may be smooth and hard in order to increase the reflectance of light, so that sunlight is easily reflected and indoor sounds are easily reverberated. As a result, the reverberation time of the sound generated in the room may be long, and the conversation in the room may be difficult to hear or the conversation may be noisy.

The present invention has been made in view of such a point, and in the present invention, it is possible to increase the illuminance in the room by taking in sunlight into the room by the light shelf and suppress the reverberation of the sound in the room. Provides a lighting structure.

In view of the above problems, the daylighting structure according to the present invention includes a daylighting window provided on the outer wall of the building, a light shelf arranged along the daylighting window and reflecting sunlight toward the ceiling surface of the room. The sound absorbing material comprises a sound absorbing material arranged in a ceiling area where the sunlight reflected by the light shelf reaches, and the sound absorbing material further reflects the sunlight reflected by the light shelf to the indoor side. A first inclined portion having a first inclined surface inclined downward on the indoor side is included, and the thickness of the first inclined portion becomes thicker from the indoor side toward the outdoor side.

According to the present invention, the sound absorbing material is arranged in the region where the sunlight reflected by the light shelf reaches, and the first inclined surface formed on the sound absorbing material is inclined downward toward the indoor side. The sunlight reflected by the light shelf can reach the interior of the room. In addition to this, the thickness of the first inclined portion increases from the indoor side to the outdoor side, so that sound in a wider frequency band can be absorbed from the indoor side to the outdoor side. As a result, the sound in the room can be absorbed more effectively. In this way, the light shelf can take in sunlight into the room and suppress the reverberation of the sound in the room.

In a more preferred embodiment, a plurality of the first inclined portions are provided along the outdoor side from the indoor side. According to this aspect, the thickness of the sound absorbing material can be changed from the indoor side to the outdoor side by the plurality of first inclined portions provided along the outdoor side from the indoor side, which is more effective. It is possible to absorb the sound in the room.

In a more preferred embodiment, the sound absorbing material further includes a second inclined portion which is arranged between adjacent first inclined portions and has a second inclined surface facing downward on the outdoor side. Assuming the second inclined portion, in a more preferable embodiment, the thickness of the second inclined portion becomes thinner from the indoor side to the outdoor side.

According to this aspect, since the second inclined surface faces downward on the outdoor side, the sound traveling from the outdoor side to the indoor side is easily absorbed by the second inclined portion, and the reflection of the sound toward the indoor side is suppressed. Can be done. In addition to this, the thickness of the first inclined portion increases from the indoor side to the outdoor side, and the thickness of the second inclined portion formed between them increases from the indoor side to the outdoor side. Since the sound is thin, it is possible to absorb sound in a wider frequency band. Further, since the second inclined portion is arranged between the adjacent first inclined portions, a valley-shaped portion is formed by the first inclined surface and the second inclined surface. When sound enters this valley-shaped portion, the sound is absorbed while being reflected by the first and second inclined portions forming the valley-shaped portion, so that the sound absorbing performance of the sound absorbing material is improved. It can be further improved.

In a more preferred embodiment, the inclination angle of the first inclined surface on the outdoor side of the adjacent first inclined surface with respect to the ceiling surface is larger than the inclination angle of the first inclined surface on the indoor side with respect to the ceiling surface. ..

According to this aspect, since the solar altitude is lower in winter than in other seasons, the sunlight reflected by the light shelf reaches the first inclined surface on the indoor side among the plurality of first inclined surfaces. Since the inclination angle of the first inclined surface on the indoor side is smaller than that on the outdoor side, the sunlight reflected by the first inclined surface on the indoor side can reach the interior of the room.

On the other hand, since the solar altitude is higher in summer than in other seasons, the sunlight reflected by the light shelf reaches the outdoor first inclined surface among the plurality of first inclined surfaces. Since the inclination angle of the first inclined surface on the outdoor side is larger than that on the indoor side, the sunlight reflected by the first inclined surface on the outdoor side can reach the interior of the room.

In a more preferable alternative aspect, the first inclined surface has a curved surface in which the inclination angle with respect to the ceiling surface increases from the indoor side to the outdoor side.

According to this aspect, since the solar altitude is lower in winter than in other seasons, the sunlight reflected by the light shelf reaches the portion of the first inclined surface having a small inclination angle on the indoor side. As a result, the inclination angle of the sunlight reflected by this portion becomes slightly shallow, so that the sunlight reflected by the first inclined surface on the indoor side can reach the interior of the room.

On the other hand, since the solar altitude is higher in summer than in other seasons, the sunlight reflected by the light shelf reaches the outdoor side of the first inclined surface having a large inclination angle. As a result, the inclination angle of the sunlight reflected by this portion becomes slightly shallow, so that the sunlight reflected by the first inclined surface on the indoor side can reach the interior of the room.

In a more preferred embodiment, the sound absorbing material includes a sound absorbing body made of a porous material and a cloth material that forms at least the first inclined surface by covering the surface of the sound absorbing body. Of these, the portion forming the first inclined surface is attached to the sound absorbing body in a non-adhesive state.

According to this aspect, the sound absorbing material is composed of a sound absorbing body and a cloth material. As a result, the sound in the room toward the sound absorbing material can be passed through the cloth material to be absorbed by the sound absorbing body, and the sunlight directed toward the sound absorbing material can be reflected by the cloth material. Here, for example, when the cloth material is adhered to the surface of the sound absorbing body via the adhesive layer, the sound passing between the fibers is reflected by the adhesive layer, and the sound absorbing performance of the sound absorbing material may deteriorate. However, in this embodiment, since the cloth material is attached to the sound absorbing body in a non-adhesive state, the sound passing between the fibers of the cloth material is different from the case where the cloth material is adhered to the sound absorbing body via the adhesive layer. Since it reaches the sound absorbing material and is absorbed, it is possible to suppress the deterioration of the sound absorbing performance of the sound absorbing material.

According to the present invention, it is possible to increase the illuminance in the room and suppress the reverberation of the sound in the room by taking in sunlight into the room by the light shelf.

It is a schematic cross-sectional view for demonstrating the daylighting structure which concerns on 1st Embodiment of this invention. FIG. 5 is an enlarged cross-sectional view of the vicinity of the sound absorbing material of the lighting structure shown in FIG. (A) is a schematic perspective view of a sound absorbing material, (b) is a cross-sectional view of line AA of (a), and (c) is an enlarged view of part B of (b). .. It is a schematic cross-sectional view for demonstrating the daylighting structure which concerns on 2nd Embodiment of this invention. (A) and (b) are modifications of the sound absorbing material of the daylighting structure according to the embodiment shown in FIG. 1, and (c) is a modification of the sound absorbing material of the daylighting structure according to the embodiment shown in FIG. is there.

Hereinafter, the lighting structure and modified examples thereof according to the first and second embodiments of the present invention will be described with reference to FIGS. 1 to 5.

[First Embodiment]
1. 1. Regarding the structure of the building 1 provided with the daylighting window 20, FIG. 1 is a schematic cross-sectional view for explaining the daylighting structure according to the first embodiment of the present invention, and FIG. 2 is a sound absorbing structure of the daylighting structure shown in FIG. It is an enlarged sectional view of the vicinity of a material. As shown in FIG. 1, the daylighting structure 10 according to the present embodiment is a structure for taking in sunlight L into the indoor RI of the building 1. The daylighting structure 10 includes a rectangular daylighting window 20, and the daylighting window 20 is provided on the outer wall 2 of the building 1. In the daylighting window 20, the upper window portion 22 and the lower window portion 23 are arranged on the window frame 21. A transom light 24 is attached to the upper window portion 22 and the lower window portion 23. The upper window portion 22 and the lower window portion 23 are made of light-transmitting glass, and light such as sunlight L of indoor RI can be transmitted from the outdoor RO. The upper window portion 22 may be, for example, a smoke exhaust window.

When the upper window portion 22 and the lower window portion 23 are made of glass, for example, float plate glass, tempered glass, wire-reinforced glass, double glazing, laminated glass and the like can be mentioned, and those having light transmission can be mentioned. However, it is not particularly limited.

In the present embodiment, the floor material 18 is laid on the floor base 17 in the indoor RI of the building 1. In the present embodiment, the ceiling structure 5 of the indoor RI is not particularly limited as long as the indoor RI can be partitioned, and the direct ceiling structure, the suspended ceiling structure, the system ceiling structure, and the folding up are not particularly limited. The ceiling structure and the like can be mentioned. FIG. 1 illustrates a suspended ceiling structure as an example. In the present embodiment, the ceiling structure 5 includes a field edge receiver 14 suspended by a hanging tool 13, a field edge 15 attached intersecting the field edge receiver 14, and a ceiling panel 12 attached to the field edge 15. It has. A ceiling base is formed by the field edge receiver 14 and the field edge 15, and a ceiling panel 12 and a sound absorbing material 40A, which will be described later, are laid on the ceiling base.

The ceiling panel 12 is made of a board material such as a wood board, a calcium silicate board, or a gypsum board, and a decorative layer, a decorative sheet, and a finishing material are further added to the surface of the ceiling panel 12 on the indoor RI side. It may be provided. When the ceiling panel 12 is a gypsum board, examples thereof include gypsum board, gypsum lath board, decorative gypsum board, sheathing gypsum board, reinforced gypsum board, and sound-absorbing perforated gypsum board that have not been subjected to secondary processing. By using gypsum board for the ceiling panel 12, the fire resistance of the building can be improved. Therefore, it is preferable that the sound absorbing material 40A (specifically, the sound absorbing body 4a; see FIG. 3), which will be described later, is also made of a material having fire resistance such as glass wool.

2. About the light shelf 30 In the present embodiment, the lighting structure 10 further includes a light shelf 30 in addition to the lighting window 20 provided on the outer wall 2 of the building 1. In the present embodiment, the light shelf 30 is arranged on the indoor RO side along the daylighting window 20, and reflects sunlight L, which is natural light, toward the ceiling surface 12a of the indoor RI. In the form, the sunlight L is reflected toward the sound absorbing material 40A described later.

In the present embodiment, the light shelf 30 extends along the window width direction of the lighting window 20 (perpendicular to the paper surface shown in FIG. 1), and has a plate-shaped support portion 31 supported by the transom light 24. , A reflecting portion 32 which is arranged on the surface of the supporting portion 31 and reflects sunlight L. In the present embodiment, the support portion 31 and the reflection portion 32 are provided separately, but these may be composed of one metal plate such as an aluminum plate, and the metal plate is painted or coated with resin. You may be.

In the present embodiment, the support portion 31 is made of metal or resin and is supported by a transom light 24 of the lighting window 20 with a cantilever support. In addition to this, when the light-collecting window 20 is not provided with the blind 24, the light shelf 30 may be supported by the window edge (not shown) of the light-collecting window 20, for example, the ceiling structure 5 or It may be attached to a part of the outer wall 2 via a hanging string (not shown).

Further, when the light shelf 30 is suspended from the ceiling structure 5 via a hanging string, an electric reel (not shown) is arranged on the outer wall 2 on the ceiling side, and one end of the hanging string can be freely wound around the electric reel. Attach, attach the other end of the hanging cord to the end of the light shelf 30 on the indoor side. In addition to this, the light shelf 30 is pivotally attached to the transom 24. Thereby, from the state of FIG. 1, the light shelf 30 can be pivoted toward the outdoor RO side by winding the hanging string with the electric reel. As a result, the space of the indoor RI near the lighting window 20 can be effectively utilized.

The reflecting unit 32 reflects the sunlight L toward the ceiling surface 12a of the indoor RI, and if the reflecting unit 32 can reflect the sunlight L, the reflecting unit 32 may be made of aluminum, stainless steel, or the like. It may be a metal plate of the above, or may be a metal film or a laminate of a metal film and a resin film. Further, the reflective portion 32 may be a coating layer in which a white paint is coated on the support portion 31, or may be a white cloth material or kraft paper coated on the support portion 31.

Further, in the present embodiment, a lighting fixture 50 provided with an LED bulb, an incandescent bulb, or the like is provided at the end of the light shelf 30 on the indoor side. For example, when the light bulb of the lighting fixture 50 is turned on when the indoor RI is dark, the light of the light bulb from the lighting fixture 50 is irradiated to the surface of the ceiling surface 12a including the surface of the sound absorbing material 40A described later, and this is reflected. .. As a result, the indoor RI can be indirectly illuminated. In particular, in the present embodiment, since the first inclined surfaces 41a to 41c are formed on the sound absorbing material 40A described later, the light from the lighting fixture 50 reaches the depths of the indoor RI through the first inclined surfaces 41a to 41c. Can be reached. Since it is difficult to directly attach the lighting to the sound absorbing material 40A, which will be described later, the indirect lighting by the lighting fixture 50 can improve the illuminance in the room and the feeling of brightness of the entire space, which are insufficient near the window at night.

3. 3. About the sound absorbing material 40A In the present embodiment, the lighting structure 10 further includes the sound absorbing material 40A in addition to the lighting window 20 and the light shelf 30. The sound absorbing material 40A is arranged in the ceiling region 12b where the sunlight L reflected by the light shelf 30 reaches in the room P1. Like the light shelf 30, the sound absorbing material 40A extends along the window width direction of the lighting window 20 (perpendicular to the paper surface shown in FIG. 1), and in the present embodiment, the width of the sound absorbing material 40A is the light. It is substantially the same as the width of the shelf 30. In the present embodiment, one sound absorbing material 40A is arranged, but a plurality of sound absorbing materials may be arranged along the window width direction.

Here, the ceiling area 12b is an area other than the area where the ceiling panel 12 shown in FIG. 1 exists, and is an area where the sunlight L from the light shelf 30 reaches. In the present embodiment, the sound absorbing material 40A is attached to the field edge 15 via a fixture or the like, and the ceiling panel 12 is attached to the back surface side of the sound absorbing material 40A (that is, opposite to the indoor RI side (roof side)). It is not provided and a space is formed.

With the sound absorbing material 40A attached in this way, for example, even if the sound in the room RI reaches the sound absorbing material 40 and the sound reached by the sound absorbing material 40 cannot be completely absorbed, the sound is absorbed by the sound absorbing material 40. Can be passed through to the back of the ceiling. As a result, it is possible to suppress the reverberation of the sound of the indoor RI.

Further, after arranging another ceiling panel at a position where the sound absorbing material 40A is arranged, the sound absorbing material 40A may be attached to the surface of the other ceiling panel. However, as shown in FIG. 1, in the present embodiment, the sound absorbing material 40A is attached to the field edge 15. With such a mounting structure, the sound absorbing material 40A is only partially restrained, and the entire back surface of the sound absorbing material 40A is not restrained. As a result, when the sound generated in the indoor RI reaches the sound absorbing material 40A, the sound absorbing material 40A itself vibrates, and a part of the reached sound can be absorbed.

In the present embodiment, as shown in FIGS. 1 and 2, the sound absorbing material 40A has a plurality of first inclined portions 43a to 43c. Each of the first inclined portions 43a to 43c has first inclined surfaces 41a to 41c inclined downward toward the indoor RI side so as to reflect the sunlight L toward the indoor RI side. Specifically, each of the first inclined surfaces 41a to 41c faces downward on the indoor RI side and is inclined with respect to the ceiling surface 12a which is a horizontal plane.

In the present embodiment, the sound absorbing material 40A arranged in the ceiling region 12b is formed with the first inclined surfaces 41a to 41c inclined downward toward the indoor RI side, so that the sun reflected by the light shelf 30 is formed. The light L can reach the depths of the indoor RI. From such a viewpoint, the inclination angles of the first inclined surfaces 41a to 41c with respect to the horizontal plane (ceiling surface 12a) may be the same, or one first inclined surface may be formed on the sound absorbing material 40A. ..

However, in the present embodiment, as a preferred embodiment, as shown in FIG. 2, the ceiling surface 12a of the first inclined surface 41b (41c) on the outdoor RO side of the adjacent first inclined surfaces 41a, 41b (41b, 41c). The inclination angle θ2 (θ3) with respect to the ceiling surface 12a of the first inclined surface 41a (41b) on the indoor RI side is larger than the inclination angle θ1 (θ2) with respect to the ceiling surface 12a. That is, the inclination angle θ2 of the first inclined surface 41b is larger than the inclination angle θ1 of the first inclined surface 41a, and the inclination angle θ3 of the first inclined surface 41c is larger than the inclination angle θ2 of the first inclined surface 41b. By satisfying such a relationship of inclination angles, the following effects can be expected.

Specifically, as shown in FIG. 1, since the solar altitude (for example, 30 ° to 40 °) is low in winter, the solar LW reflected by the light shelf 30 is a plurality of first inclined surfaces 41a to 41c. Of these, it is easy to reach the first inclined surface 41a on the indoor RI side. The inclination angle θ1 of the first inclined surface 41a on the indoor RI side is smaller than the inclination angles θ2 and θ3 of the other first inclined surfaces 41b and 41c on the outdoor RO side. As a result, the solar LW reflected by the first inclined surface 41a on the indoor RI side can reach the depths of the indoor RI.

On the other hand, as shown in FIG. 2, since the solar altitude (for example, 70 ° to 80 °) increases in summer, the solar LS reflected by the light shelf 30 is among the plurality of first inclined surfaces 41a to 41c. It is easy to reach the first inclined surface 41c on the outdoor RO side. The inclination angle θ3 of the first inclined surface 41c on the outdoor RO side is larger than the inclination angles θ1 and θ2 of the other first inclined surfaces 41a and 41b on the indoor RI side. As a result, the sunlight LS reflected by the first inclined surface 41c on the outdoor RO side can reach the depth of the indoor RO.

Since the solar altitude in spring or autumn is the solar altitude between summer and winter (for example, 50 ° to 60 °), the sunlight LM reflected by the light shelf 30 is a plurality of first inclined surfaces 41a to 41c. Of these, it is easy to reach the first inclined surface 41b in the middle. The inclination angle θ2 of the first inclined surface 41b is larger than the inclination angle θ1 of the first inclined surface 41a on the indoor RI side and smaller than the inclination angle θ3 of the first inclined surface 41c on the outdoor RO side. As a result, the sunlight LM in spring or autumn can reach the depth of the indoor RI as well as the sunlight LS and LW in summer and winter.

In the present embodiment, as shown in FIGS. 1 and 2, the sound absorbing material 40A has a saw blade-shaped cross section. Specifically, a plurality of first inclined portions 43a to 43c having the first inclined surfaces 41a to 41c are provided along the indoor RI side to the outdoor RO side. The thickness of each of the first inclined portions 43a to 43c becomes thicker from the indoor RI side to the outdoor RO side.

Further, as shown in FIG. 2, a second inclined portion 44a is formed between the adjacent first inclined portions 43a and 43b, and a second inclined portion 43b and 43c are formed between the adjacent first inclined portions 43b and 43c. Part 44b is formed. The second inclined portions 44a and 44b have second inclined surfaces 42a and 42b facing the outdoor RO side. A second inclined portion 44c having a second inclined surface 42c facing the outdoor RO side is further formed on the end surface portion of the sound absorbing material 40A on the outdoor RO side. The thickness of the second inclined portions 44a to 44c becomes thinner from the indoor RI side toward the outdoor RO side. By changing the thickness of the sound absorbing material 40A in this way, the width of the sound absorbing range is widened, so that the reverberation time from low temperature to high temperature can be adjusted.

As shown in FIG. 2, the first inclined portions 43a to 43c are portions having a thickness in the vertical direction from the first inclined surfaces 41a to 41c with reference to the first inclined surfaces 41a to 41c. Similarly, the second inclined portions 44a to 44c are portions having a thickness in the vertical direction from the second inclined surfaces 42a to 42c with reference to the second inclined surfaces 42a to 42c.

In this way, in the sound absorbing material 40A, the first inclined surfaces 41a to 41c and the second inclined surfaces 42a to 42c are alternately formed from the indoor RI side to the outdoor RO side, and the first inclined portion 43a to 43c and the second inclined portions 44a to 44c are alternately formed. In this way, as shown in FIG. 2, the sound absorbing material 40 has a mountain-shaped portion having tops 45a to 45c and valleys having bottoms 46a and 46b from the indoor RI side to the outdoor RO side. Shaped parts are formed alternately.

According to the present embodiment, the thickness of the first inclined portions 43a to 43c becomes thicker from the indoor RI side to the outdoor RO side. Therefore, in the first inclined portions 43a to 43c, from the indoor RI side to the outdoor RO side. As it progresses, it can absorb sound in a wider frequency band. In particular, in the present embodiment, the maximum thicknesses of the first inclined portions 43a to 43c are made different, and the maximum thicknesses of the first inclined portions 43a to 43c are increased in order from the outdoor RO side. As a result, the sound absorbing material 40A as a whole can absorb sound in a wider frequency band.

Further, as described above, from the indoor RI side to the outdoor RO side, mountain-shaped portions having tops 45a to 45c and valley-shaped portions having bottoms 46a and 46b are alternately formed. As a result, when sound enters this valley-shaped part, this sound is reflected in the valley-shaped part, and a part of the sound is absorbed by one of the first or second inclined parts, and the sound that cannot be absorbed is absorbed. Is absorbed on the other hand, so that the sound absorbing performance of the sound absorbing material 40C can be further improved. Further, since the second inclined surfaces 42a to 42c are directed to the outdoor side, the sound traveling from the outdoor RO side to the indoor RI side is easily absorbed by the second inclined portions 44a to 44c, and the sound reflected toward the indoor RI side is easily absorbed. Can be suppressed.

3 (a) is a schematic perspective view of the sound absorbing material, FIG. 3 (b) is a cross-sectional view taken along the line AA of FIG. 3 (a), and FIG. 3 (c) is FIG. 3 (c). It is an enlarged view of the part B of b). As shown in FIGS. 3A to 3C, the sound absorbing material 40A covers the surfaces of the sound absorbing body 4a made of a porous material and the sound absorbing body 4a, thereby covering the surfaces of the first inclined surfaces 41a to 41c and the second. It includes a cloth material 4b that forms the inclined surfaces 42a to 42c.

As shown in FIG. 3C, the sound absorbing body 4a is formed from an inorganic fiber made of an inorganic material such as glass wool, an acrylic resin fiber, or an organic fiber made of an organic material such as PET resin. It is a fiber molded body. A continuous ventilation hole is formed inside the sound absorbing body 4a due to the shape of the fiber.

The cloth material 4b is a white woven cloth or a non-woven fabric, and is, for example, an achromatic cloth material having a lightness (L ^* value) of 80 or more in the ^{(L *} , a ^* , b ^{*) color system.} In the present embodiment, the cloth material 4b is a woven cloth, and the woven cloth is not particularly limited to a twill weave, a plain weave, a red woven cloth, or the like. Since they are arranged regularly, the sunlight L can be reflected more efficiently on the indoor RI side.

Further, if the cloth material 4b can form the first inclined surfaces 41a to 41c and the second inclined surfaces 42a to 42c by covering the surface of the sound absorbing body 4a, the cloth material for the sound absorbing body 4a The mounting state of 4b is not particularly limited. However, it is preferable that the portion of the cloth material 4b that forms the first inclined surfaces 41a to 41c is attached to the sound absorbing body 4a in a non-adhesive state, and the second inclined surfaces 42a to 42c of the cloth material 4b are formed. It is more preferable that the portion to be used is attached to the sound absorbing body 4a in a non-adhesive state. The cloth material 4b is attached to the sound absorbing body 4a with an adhesive, an adhesive tape, staples, or the like, except for the non-adhesive portion.

With this configuration, the sound of the indoor RI toward the sound absorbing material 40A can be absorbed by the sound absorbing body 4a, and the sunlight L can be reflected by the cloth material 4b. As shown in FIG. 3, the sound directed to the sound absorbing material 40A passes between the fibers 4d of the cloth material 4b and is absorbed by the sound absorbing body 4a. As a result, it is possible to suppress finishing processing having a high light reflectance on the ceiling surface of the ceiling board, and it is possible to reduce the cost.

Here, unlike the present embodiment, when the cloth material 4b is adhered to the surface of the sound absorbing body 4a via the adhesive layer, the sound passing between the fibers 4d of the cloth material 4b is reflected by the adhesive layer. The sound absorbing performance of the sound absorbing material may deteriorate. In view of these points, in the present embodiment, as shown in FIG. 3C, since the cloth material 4b is attached to the sound absorbing body 4a in a non-adhesive state, the cloth material 4b is attached to the sound absorbing body 4a via the adhesive layer. Unlike the case where it is adhered to the sound absorbing body, the sound that has passed between the fibers 4d reaches the sound absorbing body 4a containing the fibers 4c and is absorbed. As a result, it is possible to suppress the deterioration of the sound absorbing performance of the sound absorbing material 40A.

As described above, according to the daylighting structure 10 of the present embodiment, the light shelf 30 can take in the sunlight L to the depth of the indoor RI and suppress the reverberation of the sound of the indoor RI.

[Second Embodiment]
FIG. 4 is a schematic cross-sectional view for explaining the lighting structure according to the second embodiment of the present invention. The difference between the lighting structure 10 according to the second embodiment shown in FIG. 4 and that of the first embodiment is the shape of the sound absorbing material 40B. The sound absorbing material 40B will be described below, and the same other configurations as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in FIG. 4, the sound absorbing material 40B according to the present embodiment has an inclined portion (first inclined portion) 43 having an inclined surface (first inclined surface) 41. The inclined surface 41 faces the indoor RI side so as to further reflect the sunlight L reflected by the light shelf 30 toward the indoor RI side, and is inclined with respect to the ceiling surface 12a. More specifically, the inclined surface 41 has a curved surface in which the inclination angle with respect to the ceiling surface 12a increases from the indoor RI side to the outdoor RO side. In the present embodiment, the inclined surface 41 is such a curved surface, but for example, the inclined surface 41 may be composed of such a curved surface and an inclined plane further shown in FIG.

Since the solar altitude is lower in winter than in other seasons due to such a sound absorbing material 40B, the sunlight LW reflected by the light shelf 30 is applied to the portion of the inclined surface 41 having a small inclination angle on the indoor RI side. To reach. As a result, the inclination angle of the solar LW reflected at this portion becomes slightly shallow, so that the solar LW reflected by the inclined surface 41 on the indoor RI side can reach the depth of the indoor RI.

On the other hand, since the solar altitude is higher in summer than in other seasons, the sunlight LS reflected by the light shelf 30 reaches the portion of the inclined surface 41 having a large inclination angle on the outdoor RO side. As a result, the inclination angle of the solar LW reflected at this portion becomes shallow, so that the solar LS reflected by the inclined surface 41 on the indoor RI side can reach the depth of the indoor RI. Further, the solar altitude in spring or autumn is the solar altitude between summer and winter, and in this case as well, as shown in FIG. 4, the solar LS reflected by the light shelf 30 can reach the depth of the indoor RI. it can.

In the present embodiment, as in the first embodiment, by changing the thickness of the sound absorbing material 40B, the width of the sound absorbing range is widened, so that the reverberation time from low temperature to high temperature can be adjusted.

In the first embodiment shown in FIG. 1, one saw blade-shaped sound absorbing material 40A was used, but for example, as shown in FIG. 5A, the first inclined portions 43a (43b, 43c) and the first inclined portion 43a (43b, 43c). The two inclined portions 44a (44b, 44c) may be formed into one triangular columnar sound absorbing member 40C (40C', 40C''), and these may be connected by a connecting material 49 such as an adhesive tape to form one sound absorbing material 40A. ..

Further, in the first embodiment and the modified example shown in FIG. 5A, the inclination angle of the first inclined surface on the outdoor RO side with respect to the ceiling surface 12a among the adjacent first inclined surfaces is the first inclination on the indoor RI side. Although it was larger than the inclination angle of the surface with respect to the ceiling surface 12a, for example, as shown in FIG. 5B, the inclination angles of the first inclined surfaces 41a to 41c of the sound absorbing members 40D to 40D'' were set to the same angle θ. May be good.

Further, in the second embodiment shown in FIG. 4, the inclined surface 41 has a curved surface in which the inclination angle with respect to the ceiling surface 12a increases from the indoor RI side to the outdoor RO side, but the inclined surface of the sound absorbing material 40E. 41 may be a flat surface as shown in FIG. 5 (c).

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs are designed without departing from the spirit of the present invention described in the claims. You can make changes.

For example, in the first and second embodiments, the light shelf is arranged indoors, but if the sunlight can be reflected and the sunlight can be taken into the room through the lighting window, the light shelf is arranged outdoors. You may.

Further, in the first embodiment, three first inclined portions are provided, but if the sunlight reflected from the light shelf can be reflected to the indoor side and the sound in the room can be absorbed, the first The number of 1 inclined portions is not particularly limited.

1: Building, 2: Outer wall, 4a: Sound absorber, 4b: Cloth material, 5: Ceiling structure, 10: Daylighting structure, 12: Ceiling panel, 12a: Ceiling surface, 20: Daylighting window, 40A, 40B, 40E: Sound absorbing Material, 41: Inclined surface (first inclined surface), 41a to 41c: First inclined surface, 42a to 42c: Second inclined surface, 43a to 43c: First inclined portion, 44a to 44c: Second inclined portion, L , LS, LM, LW: Sunlight, RI: Indoor, RO: Outdoor

Claims (7)

Daylighting windows on the outer wall of the building
A light shelf that is placed along the daylighting window and reflects sunlight toward the ceiling surface in the room.
A sound absorbing material placed in the ceiling area where the sunlight reflected by the light shelf reaches
With
The sound absorbing material includes a first inclined portion having a first inclined surface inclined downward toward the indoor side so as to further reflect the sunlight reflected by the light shelf toward the indoor side.
The daylighting structure is characterized in that the thickness of the first inclined portion increases from the indoor side to the outdoor side. The lighting structure according to claim 1, wherein a plurality of the first inclined portions are provided from the indoor side along the outdoor side. The second aspect of the present invention, wherein the sound absorbing material is arranged between adjacent first inclined portions and further includes a second inclined portion having a second inclined surface facing downward on the outdoor side. Daylighting structure. The lighting structure according to claim 3, wherein the thickness of the second inclined portion becomes thinner from the indoor side to the outdoor side. A claim characterized in that the inclination angle of the first inclined surface on the outdoor side of the adjacent first inclined surface with respect to the ceiling surface is larger than the inclination angle of the first inclined surface on the indoor side with respect to the ceiling surface. Item 8. The lighting structure according to any one of Items 2 to 4. The lighting structure according to claim 1, wherein the first inclined surface has a curved surface in which the inclination angle with respect to the ceiling surface increases from the indoor side to the outdoor side. The sound absorbing material includes a sound absorbing body made of a porous material and a cloth material that forms at least the first inclined surface by covering the surface of the sound absorbing body.
The lighting structure according to any one of claims 1 to 6, wherein a portion of the cloth material forming the first inclined surface is attached to the sound absorbing body in a non-adhesive state.

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