JP6140949B2 - Building lighting structure - Google Patents

Description

  The present invention relates to a daylighting structure for a building that guides sunlight into a room.

  Examples of daylighting structures for buildings that direct sunlight into the room include toplights, atriums, high-side lights, and light ducts.

  Patent Document 1 discloses a structure in which a daylight entrance for taking in sunlight is installed on the roof of a building, and sunlight taken in from the daylight entrance is reflected by a wall surface exterior material.

  Patent Document 2 discloses a system including a diffuser positioned to receive light transmitted by a sunshine adjustment film that redirects light.

JP-A-8-338117

Special table 2010-527815

  However, the top light cannot efficiently guide light to the floor when there is a wall between the lighting surface and the ceiling surface. In addition, depending on the position of the sun, the floor is illuminated by direct light, causing problems such as ultraviolet light degradation and glare. The atrium and high-side light also illuminate the floor with direct light, causing problems such as ultraviolet light degradation and glare. In addition, the light duct can diffuse light at the light emission port, but it is not easy to configure a large space light duct.

  Moreover, also in the lighting structure of the building described in the above-mentioned Patent Document 1, depending on the position of the sun, the floor is illuminated by direct light, causing problems such as ultraviolet degradation and glare.

  On the other hand, in the daylighting structure described in Patent Document 2, it is possible to prevent the floor from being illuminated by direct light, but it is desired to secure higher illuminance on the floor.

  In view of the above circumstances, the present invention provides a daylighting structure for a building that can prevent the floor of a building from being illuminated by direct light as much as possible, reduce ultraviolet light degradation and glare, and ensure high illuminance on the floor. Is an issue.

  In the daylighting structure of the building of the present invention, in order to solve the above-described problem, a diffuse reflector having a diffuse reflectance of 90% or more is opposed to a wall surface forming a light guide space from the roof side of the building toward the floor. And a daylighting unit having an optical member that changes a light beam direction is provided on the roof of the building, and sunlight introduced from the daylighting unit is reflected by the facing diffuse reflection material. It is guided to the floor through the light guide space.

  With the above configuration, since the daylighting unit having an optical member that changes the light beam direction is provided on the roof of the building, the floor is prevented from being illuminated by direct light as much as possible, and UV deterioration and glare are reduced. it can. Then, the sunlight introduced from the daylighting unit is guided to the diffusive reflective material disposed opposite to the diffuse reflectance of 90% or more, and repeats high-efficiency diffuse reflection to pass through the light guide space. Since the light is guided to the floor, the glare can be further suppressed and high illuminance can be secured on the floor.

  The daylighting unit having the optical member is provided on the wall surface of the rooftop constructed on the roof of the building, and a diffuse reflector having a diffuse reflectance of 90% or more is also disposed on the back surface side of the rooftop. The sunlight introduced from the daylighting unit may be guided by the optical member to the diffuse reflector disposed on the back side of the rooftop.

  The daylighting unit having the optical member is provided on the roof surface of the rooftop constructed on the roof of the building, and the diffuse reflector is disposed opposite to the wall surface of the light guide space located below the rooftop. The sunlight introduced from the daylighting unit may be guided to the diffuse reflector by the optical member.

  A sunlight tracking daylighting device may be provided as the daylighting unit. According to this, even if the altitude or direction of the sun changes, sunlight can be introduced into the building.

  A window may be provided on a wall surface forming the light guide space. Light diffused by the diffusive reflector through such a window can be taken into the room, and even if such a window exists, high illuminance can be secured on the floor by the diffusive reflector.

  According to the present invention, it is possible to avoid as much as possible that the floor of the building is illuminated by direct light, to reduce UV deterioration and glare, and to secure high illuminance on the floor.

It is explanatory drawing which showed the building to which the lighting structure of embodiment of this invention was applied. It is an AA expanded sectional view of FIG. It is BB expanded sectional drawing of FIG. It is explanatory drawing which showed the building to which the lighting structure of other embodiment of this invention was applied. It is explanatory drawing which showed the building to which the lighting structure of other embodiment of this invention was applied.

  Next, the daylighting structure of the building which concerns on embodiment of this invention is demonstrated concretely based on an accompanying drawing. In addition, the lighting structure of the building which concerns on this invention is not limited to what was shown to the following embodiment, In the range which does not change the summary, it can implement suitably.

  As shown in FIGS. 1, 2 and 3, the daylighting structure of the building of this embodiment can be applied to a one-story structure building 1 used as a store. Overtops 21 are constructed at two locations on the roof 2 of the building 1. The crossover 21 is formed long in the gradient direction of the roof 2, and the two crossovers 21 are arranged in parallel to each other.

  In the building 1, a light guide space from the rooftop 21 toward the first floor 11 is formed. Moreover, the lighting part 3 and the opening-and-closing window part 4 are provided in the wall surface of the said rooftop 21 in the longitudinal direction. The daylighting unit 3 is provided with an optical member 5 that changes the light beam direction. The optical member 5 is made of, for example, a photorefractive film that has minute irregularities on the surface and refracts light in a specific direction. As such a photorefractive film, a daylighting window film manufactured by Sumitomo 3M Co., Ltd. (for example, a solar control film of Patent Document 2) can be used. In this embodiment, the optical member 5 refracts light so as to guide light incident from obliquely upward to obliquely upward. In addition, the optical member which guides the light incident from diagonally upward can be configured by arranging the reflective members at intervals in the vertical direction.

  A highly diffuse reflection sheet 6 is affixed to the lower surface of the top plate 12 disposed on the back side of the rooftop 21. The top plate 12 is formed by, for example, attaching a board to a lightweight stud, and glass wool is provided on the upper surface thereof. Further, as the high diffuse reflection sheet 6, a sheet having a diffuse reflectance (see, for example, JIS K 5500) of 90% or more is used. In this embodiment, a sheet having a diffuse reflectance of 94.5% or more is used. Yes. Specifically, Scotchal (registered trademark) film (white) or Dynok (registered trademark) film (white) manufactured by Sumitomo 3M Co., Ltd. having a diffuse reflectance of 94.5% or more is used.

  Further, a highly diffuse reflection sheet 7 is attached to the surface of the wall plate 13 located inside the side wall of the rooftop 21. In the figure, the wall plates 13 located on the left and right face each other, and the high diffuse reflection sheet 7 affixed to each surface is arranged to face each other. The wall plate 13 is also formed by attaching a board to a lightweight stud, for example, and glass wool is provided on the back side thereof. The lower end of the wall plate 13 is joined to the edge of the ceiling plate 14 suspended from the roof 2. When the rooftop 21 is looked up from the side of the first floor 11, an elongated white concave space is seen on the ceiling plate 14, and the lighting unit 3 and the opening / closing window 4 are connected to the side surface of the white concave space. Will see.

  Sunlight introduced from the daylighting unit 3 is guided to the high diffusion reflection sheet 6 by the optical member 5 and reflected by the high diffusion reflection sheet 6. The light reflected by the high diffuse reflection sheet 6 is reflected by the high diffuse reflection sheet 7 and guided to the first floor 11 through the white concave space.

  If it is said structure, since the lighting part 3 which has the optical member 5 which changes a light beam direction is provided in the roof 2 of the said building 1, it avoids that the 1st floor 11 is illuminated by direct light as much as possible. , UV degradation and glare can be reduced. And the sunlight introduce | transduced from the said lighting part 3 is guide | induced to the said high-diffusion reflection sheet 6 with a diffuse reflectance of 90% or more, and is further guide | induced to the said high-diffusion reflection sheet 7 arrange | positioned facing, and high Since the diffuse reflection is repeated and guided to the first floor 11 through the light guide space, the glare can be further suppressed and high illuminance can be secured on the first floor 11.

  The building 1 shown in FIG. 4 is a four-story building, and a daylighting unit 3 having an optical member 5 that changes the light beam direction on the roof surface of the rooftop 21 located at the top of the atrium space (light guide space). Is provided. The optical member 5 is not limited to the above-described solar lighting window film, and may have a structure in which, for example, a reflection member is arranged in a mountain shape. Even in such a structure, light incident from above is transmitted through the wall surface of the blow-off space. Can lead to.

  A highly diffuse reflection sheet 7 is affixed to the wall surface of the atrium space. In FIG. 4, the cross section at the position of the window 15 is shown, and it seems that the high diffuse reflection sheet 7 is disposed only on the wall surface of the interstitial part. The high diffuse reflection sheet 7 is attached. And the wall surface of the said blow-through space faces each other, and the said high diffusion reflection sheet 7 stuck on each wall surface is arrange | positioned facing.

  Even in such a daylighting structure, since the daylighting unit 3 is provided, it is possible to avoid the first floor 11 from being illuminated by direct light as much as possible, and to reduce UV degradation and glare. And the sunlight introduced from the said lighting part 3 is guide | induced to the said highly arrange | positioned highly diffused reflection sheet 7 by which the diffuse reflectance is 90% or more by the said optical member 5, and repeats a high rate diffuse reflection. Since it is guided to the first floor 11 through the atrium, the glare can be further suppressed and high illuminance can be secured on the first floor 11.

  Since the wall 15 forming the blow-off space is provided with the window 15, the light diffused by the high diffuse reflection sheet 7 can be taken into the room through the window 15. And even if such a window 15 exists, a high rate of diffuse reflection is repeated due to the presence of the high diffuse reflection sheet 7, so that high illuminance can be secured on the first floor 11.

  In addition, the said highly diffuse reflection sheet 6 can be arrange | positioned in locations other than the arrangement | positioning location of the said lighting part 3 on the back surface of the said roof 21.

  The building 1 shown in FIG. 5 is a four-story building, and a solar light daylighting device 31 is provided as the daylighting unit 3 having the optical member 5 on the rooftop 21 located at the top of the atrium. . The sunlight tracking and lighting device 31 is, for example, arranged in a mountain shape so that the prism sheet and the reflecting mirror face each other at an angle of 90 °, and guides the sunlight incident on the prism sheet downward, Sunlight that enters the prism sheet and travels in the lateral direction is guided downward by the reflecting mirror. The solar light tracking and lighting device 31 drives the sun tracking motor based on the output of the solar altitude / orientation sensor having a light receiving unit (not shown), so that the solar altitude and direction always change even if the sun's altitude and direction change. Light can be introduced into the atrium space of the building 1.

  The high diffuse reflection sheet 7 is attached to the wall surface of the atrium space. The wall surfaces of the blow-off space face each other, and the high diffuse reflection sheet 7 attached to each surface is arranged to face each other.

  In such a daylighting structure, it is possible to avoid as much as possible that the first floor floor 11 is illuminated by direct light by the solar light tracking daylighting device 31, and to reduce UV degradation and glare. The glare can be further reduced by providing a light diffusion / transmission plate below the prism sheet and the reflecting mirror arranged in the mountain shape. Then, the sunlight introduced by the solar light tracking and lighting device 31 is guided to the opposed high diffuse reflection sheet 7 having a diffuse reflectance of 90% or more, and repeats a high rate of diffuse reflection to blow through the air. Since it is guided to the first floor 11 through the space, the glare can be further suppressed and high illuminance can be secured on the first floor 11.

  The high diffuse reflection sheet 7 is disposed opposite to the wall surface forming the light guide space. However, the facing arrangement is not limited to the facing arrangement, and may be an oblique facing arrangement. Further, the high diffuse reflection material is not limited to a sheet but may be a coating. Moreover, the optical member 5 may have a function of cutting ultraviolet rays or infrared rays. Further, when the daylighting unit 3 is provided only in one direction, the daylighting unit 3 may be arranged facing south. Even if the daylighting unit 3 is arranged in the south direction in this way, strong indoor direct illumination is prevented. Further, the solar light daylighting device may be provided on the wall surface of the rooftop or may be provided at a place other than the rooftop.

DESCRIPTION OF SYMBOLS 1 Building 11 Floor 12 Top plate material 13 Wall board 14 Ceiling board 15 Window 2 Roof 21 Over roof 3 Daylighting part 31 Sun light tracking lighting device 5 Optical member 6 High diffuse reflection sheet 7 High diffuse reflection sheet

Claims (5)

Diffuse reflectors having a diffuse reflectance of 90% or more are arranged opposite to the wall surface of the room forming the light guide space from the roof side of the building to the floor, and the light beam direction is changed on the roof of the building. A daylighting unit having an optical member is provided, and the sunlight introduced from the daylighting unit is reflected by the diffusive reflecting material arranged oppositely and guided to the floor through the light guide space. And
The daylighting unit having the optical member is provided on the wall surface of the rooftop constructed on the roof of the building, and a diffuse reflector having a diffuse reflectance of 90% or more is also disposed on the back surface side of the rooftop. The building lighting structure is characterized in that sunlight introduced from the daylighting unit is guided to the diffuse reflector disposed on the back side of the rooftop by the optical member . Diffuse reflectors having a diffuse reflectance of 90% or more are arranged opposite to the wall surface of the room forming the light guide space from the roof side of the building to the floor, and the light beam direction is changed on the roof of the building. A daylighting unit having an optical member is provided, and the sunlight introduced from the daylighting unit is reflected by the diffusive reflecting material arranged oppositely and guided to the floor through the light guide space. And
The daylighting unit having the optical member is provided on the roof surface of the rooftop constructed on the roof of the building, and the diffuse reflector is disposed opposite to the wall surface of the light guide space located below the rooftop. The building daylighting structure is characterized in that sunlight introduced from the daylighting unit is guided to the diffuse reflector by the optical member . The lighting structure of the building according to claim 1 or 2 , wherein the light guide space is an atrium, and when the roof side is looked up from the floor side, the diffuse reflector in the room forming the atrium is arranged. A daylighting structure of a building, characterized by the fact that the light diffusion concave space by the wall surface can be seen. The building lighting structure according to any one of claims 1 to 3 , wherein a sunlight tracking lighting device is provided as the lighting section. The building lighting structure according to any one of claims 1 to 4 , wherein a window is provided on a wall surface forming the light guide space.

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