JP2014163209A - Daylighting face material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a daylighting face material capable of sufficiently taking in the outdoor light up to the innermost part in a room without discomfort, capable of improving a brightness feeling in the room, hardly deteriorating a sticking surface of a refractive raw material layer by solar radiation heat from the outdoors, and formable as a heat shield type applicable to a wet and hot district.SOLUTION: A daylighting face material 1 is provided in an opening part 11 of a building, and is provided for taking the outdoor light in the room by blocking up the opening part 11. The daylighting face material 1 comprises: an outdoor side plate 2 provided on the outdoor side and composed of a nondiffusible light-transmissive material; and an indoor side plate 3 provided on the indoor side being separated from this outdoor side plate 2 with an air layer 4 therebetween. The outdoor side plate 2 is formed by interposing a light-transmissive crime-preventive film, for example, between two light-transmissive plates 2a and 2a. A raw material layer 9 for refracting and transmitting the incident light is provided on a surface of turning to the air layer 4 of the indoor side plate 3. A heat ray shielding film 5 is provided on a surface directed to the air layer 4 of the outdoor side plate 3.

Description

  The present invention relates to a daylighting surface material that is provided at an opening of a daylighting window or the like of a building to improve a sense of brightness in the room.

  In order to increase the brightness of the room due to natural light and to adjust the glare, the incident of sunlight into the room is adjusted by a lighting adjustment facility installed outdoors. For example, Patent Documents 1 and 2 are methods in which a light shelf including a basket, a shelf, or the like that can reflect sunlight is provided to reflect incident light toward the ceiling. Patent Document 3 is a method of appropriately taking the solar radiation blocked by a cantilever balcony or the like into a room by refracting it with a solar control board provided outdoors.

  In addition, instead of installing the lighting adjustment equipment as described above, the incident of sunlight into the room is also adjusted by devising a lighting surface material provided in the window. A common daylighting surface material is a diffusing plate such as frosted glass, or a translucent plate such as transparent glass. The outdoor surface of these diffusing plate or translucent plate is covered with a prism sheet so that sunlight is emitted indoors. There has been proposed a window plate that leads to the back of the window (for example, Patent Document 4). In addition, in a dome-type daylighting apparatus, a technique has been proposed in which a milky white dome cover is attached to a daylighting opening and a light distribution plate having a prism processing is provided at an emission opening (Patent Document 5). As a technique for improving the light shielding property, there is a window glass provided with a polarizing film (for example, Patent Document 6).

JP 2012-230841 A JP 2001-323621 A JP 2011-163065 A JP 11-280350 A JP-A-11-281913 JP 2008-165201 A JP 2010-001628 A JP 2008-259406 A

  The lighting adjustment equipment such as the light shelf and the solar radiation control board is basically a system in which sunlight is reflected and taken into the room. Therefore, sufficient effects cannot be expected unless sunlight is directly applied to the lighting adjustment facility. When the weather is cloudy, the light shelf and solar control board may block the light from the outside, and the room may become darker. For these reasons, these lighting adjustment facilities must be installed on the south side of the building, and there are problems such as the effect of the weather etc., and the use cases are limited. Moreover, even if light can be sufficiently taken into the room, the effect may be difficult to understand visually.

  Further, the conventional daylighting surface material has the following problems. In other words, in the case where the prism processing part is provided on the above-described emission side surface, it is possible to guide sunlight to the back of the room, but there may be a rainbow-like light pattern in the room, and there is a sense of discomfort as natural light. End up. In addition, the prism-processed surface is easily contaminated due to the unevenness. Although it is conceivable to use a refracting film that refracts light instead of the prism processing portion, a discomfort may occur as natural light due to a light pattern such as a rainbow in the room, as in the case where the prism processing portion is provided. In addition, the refractive effect of the refractive film is reduced due to scratches, dirt, modification by ultraviolet rays, and the like.

  Therefore, the daylighting surface material shown in FIG. 11 in which the problems of the conventional daylighting surface material are solved has been proposed (Japanese Patent Application No. 2012-186522). In the daylighting surface material 1A of the figure, a refractive material layer 9 that refracts and transmits incident light is provided on the back surface of the outdoor side plate 2 made of a translucent plate, and an indoor side plate 3 made of a diffusion plate is provided on the indoor side. Is. An air layer 4 is interposed between the outdoor side plate 2 and the indoor side plate 3.

  According to the daylighting surface material 1A of this proposed example, when the light from the sun at a high position is taken into the room through the daylighting surface material 1A from the opening of a window or the like of the outer wall of the building, the outdoor side plate 2 made of a translucent plate. The incident light transmitted downward is refracted into upward light by the refractive material layer 9, and the upward light passes through the indoor side plate 3 made of a diffusion plate to become diffused light. As a result, light from the outside can be taken into the interior of the room, and the walls and ceiling, which are important for obtaining a feeling of brightness, become brighter, and the feeling of brightness in the room is improved.

  The proposed example in the figure is superior to a certain extent by having a pair glass structure with an air layer 4 interposed between them for heat insulation, but it is a heat shield type with further heat insulation and improved security. A proposal example shown in FIG. 12 was devised. In the example of FIG. 11, in the proposed example of FIG. 11, a heat ray shielding film 5 such as Low-E glass is provided on the surface of the indoor side plate 3 on the air layer 4 side, and the indoor side plate 3 is made of the light transmitting plate 6 and the diffusion plate 7. The security film 8 is interposed between the two plates. According to the example of the figure, by providing the heat ray shielding film 5, it becomes a heat shielding daylighting surface material excellent in heat insulation.

  However, in the example of the figure, since the refractive material layer 9 is pasted on the back surface of the outdoor side plate 2, the position where the heat ray shielding film 5 is pasted is limited to the air layer 4 side surface of the indoor side plate 3. In addition, when the outer member 9 is stretched on the back surface of the outdoor side plate 2 in this way, there is a concern about deterioration of the adhesive surface of the refractive material layer 9 due to solar heat from the outside. In particular, when the refractive material layer 9 is a film, there is a high risk of deterioration of the adhesive surface due to the solar radiation from the outside. For this reason, it is difficult to apply the heat shielding type in a hot and humid area.

  The object of the present invention is to allow outdoor light to be fully taken into the interior of the room without a sense of incongruity, to improve the feeling of indoor brightness, and for the daylighting function due to dirt and modification even during long-term use. Daylighting material that can be used as a heat-shielding type that can be applied to hot and humid areas, and the opening of a building using this daylighting material. To provide a partial structure.

The daylighting material of the present invention is a multi-layered daylighting material that is provided at an opening of a building, closes the opening, and takes in outdoor light indoors, and is a non-diffusible light-transmitting material provided outside the room A multi-layer or single-layer outdoor side plate, and a multi-layer or single-layer indoor side plate having at least a diffuser plate provided on the indoor side with an air layer separated from the outdoor side plate to diffuse transmitted light, It is provided with a refractive material layer which is provided on a surface of the indoor side plate facing the air layer and refracts and transmits incident light, and a heat ray shielding film provided on a surface of the outdoor side plate facing the air layer. To do.
The opening of the building is an outer wall, various walls such as a partition wall and a balcony waist wall, a window opening provided on a roof surface and the like, an entrance / exit, and the like. The refractive material layer is a refractive film or a coating layer of a refractive material.

  According to this configuration, for example, when light from the sun at a high position is taken into the room through the daylighting material from an opening such as a window on the outer wall of the building, the incident light is transmitted downward through the outdoor plate made of a translucent plate. The light is refracted into upward light by the refractive material layer, and the upward light passes through the indoor side plate made of the diffusion plate to become diffused light. As a result, light from the outside can be taken into the interior of the room, and the walls and ceiling, which are important for obtaining a feeling of brightness, become brighter, and the feeling of brightness in the room is improved. Therefore, there is solar shading by the adjacent building etc. in a narrow area, etc., and even in an environment where lighting is not normally expected, light from the opening can be delivered to the back of the room, improving the brightness and refreshing of the room .

  Unlike the case where a refractive material layer is provided on the exit surface, the light that has passed through the refractive material layer is diffused by the indoor side plate consisting of a diffusing plate. Can be relaxed with the indoor side plate, and light without a sense of incongruity can be delivered to the room. Since the refractive material layer is located between the outdoor side plate and the indoor side plate, unlike the case where it is exposed, scratches and dirt are less likely to occur, and the effect of refraction is prevented from being lowered due to modification by ultraviolet rays, etc. Performance is maintained.

Moreover, since this lighting surface material is a pair glass structure which interposed the air layer between the outdoor side board and the indoor side board, the heat insulation effect is high. In addition, since the heat ray shielding film is provided on the outdoor side plate, the heat insulating effect for preventing the outside heat from being transmitted to the room is higher, and the heat shielding effect is obtained. Further, since the refractive material layer is provided on the indoor side plate, it is less susceptible to the influence of solar heat from the outside as compared with the case where it is provided on the outdoor side plate. Therefore, it is difficult for the attached surface of the refractive material layer to deteriorate. In the case where the refractive material layer is a film, the above-described problem of deterioration due to solar heat on the adhesive surface of the film is particularly large. However, even if the refractive material layer is a refractive film, the fear of deterioration is solved. Therefore, while providing a refraction material layer with a pair glass structure to improve the light intake property, it is suitable for use in hot and humid areas by providing a heat ray shielding film without causing problems of deterioration due to solar heat. I can do it.

In the daylighting surface material of the present invention, the outdoor side plate may be formed by interposing a translucent security film between two translucent plates.
In the lighting surface material of the present invention, the indoor side plate includes a non-diffusible light transmitting plate and a diffusion plate for diffusing transmitted light, and a security film is interposed between the light transmitting plate and the diffusion plate. You may let them.
If a security film is included, the opening will not open easily even if the daylighting material is cracked, so that the security effect can be improved, but the present invention can also be applied to a configuration in which such a security film is interposed. In addition, it is possible to improve the light intake property and to make the heat shielding type.

  In the daylighting material of the present invention, the refractive material layer may be a refractive film. When a refractive film is used, a refractive material layer can be easily formed as compared with coating or the like. In the case of a film, the problem of deterioration due to solar radiation tends to occur depending on the location where the refractive material layer is provided, but since the location where the refractive material layer is provided is an indoor side plate as described above, deterioration due to solar heat is prevented.

Furthermore, in the daylighting surface material of the present invention, the opening provided with the daylighting surface material is an opening in the wall surface of the building, and the refractive material layer is incident light transmitted downward from the translucent plate from the outdoor side. It may have a refractive property that refracts upward.
In the case of the opening provided in the wall surface, it is generally preferable to have a refractive property that refracts upward in order to improve the sense of brightness in the room.

The opening structure of a building according to the present invention is provided with the daylighting member having any one of the above-described configurations according to the present invention.
According to this opening structure, as described above for the daylighting surface material of the present invention, the light from the opening is delivered to the interior of the room without a sense of incongruity even in an environment where sufficient lighting is not normally expected in a narrow area, etc. Brightness can be improved. In addition, the daylighting surface material is less likely to deteriorate the attachment surface of the refractive material layer due to solar heat from the outside, and can be applied to a hot and humid area.

  The daylighting material of the present invention is a multi-layered daylighting material that is provided at an opening of a building, closes the opening, and takes in outdoor light indoors, and is a non-diffusible light-transmitting material provided outside the room A multi-layer or single-layer outdoor side plate, and a multi-layer or single-layer indoor side plate having at least a diffuser plate provided on the indoor side with an air layer separated from the outdoor side plate to diffuse transmitted light, Since it comprises a refractive material layer that is provided on the surface of the indoor side plate facing the air layer and refracts and transmits incident light, and a heat ray shielding film that is provided on the surface of the outdoor side plate facing the air layer, Light can be taken deeply into the room without a sense of incongruity, improving the brightness of the room, and reducing the lighting function due to dirt and denaturation even during long-term use. Surface of refractive material layer by solar heat Degradation hardly occurs, it can be an applicable heat shield type hot and humid regions.

  The opening structure of the building according to the present invention is provided with the daylighting material of the present invention at the opening of the building, so that outdoor light can be sufficiently taken into the interior of the room without a sense of incongruity, and the brightness of the room is improved. In addition, it has an excellent heat shielding effect and can be applied to hot and humid areas.

It is sectional drawing which fractures | ruptures and shows a part of opening part of the building using the lighting surface material concerning one Embodiment of this invention. (A) is a longitudinal sectional view showing a daylighting state of an example of a building using the daylighting material shown in FIG. 1 for an opening, and (B) is a building using a daylighting material made of only a transparent glass plate for the opening. It is a longitudinal cross-sectional view which shows an example of the lighting condition. (A) is a graph showing the relationship between the emission angle due to the difference in the incident angle of the daylighting material shown in FIG. 1 and the visible light transmittance, and (B) is the emission angle due to the difference in the incident angle of the daylighting material as a comparative example. It is a graph which shows the relationship of visible light transmittance | permeability. (A) is a longitudinal sectional view showing a daylighting state of an example of a room using the daylighting surface material shown in FIG. The longitudinal cross-sectional view which shows the lighting condition at the time of providing a material, (C) is a horizontal sectional view which shows the lighting condition of the room of (A). It is a longitudinal cross-sectional view which shows the lighting state of the other example of the room which provided the lighting surface material shown in FIG. 1 in the opening part. It is a longitudinal cross-sectional view which shows the lighting state of the further another example of the room which provided the lighting surface material shown in FIG. 1 in the opening part. It is a longitudinal cross-sectional view which shows the lighting state of the further another example of the room which provided the lighting surface material shown in FIG. 1 in the opening part. It is a horizontal sectional view which shows the lighting state of the room which provided the lighting surface material shown in FIG. 1 in the opening part. It is sectional drawing which fractures | ruptures and shows a part of opening part of the building using the lighting surface material concerning other embodiment of this invention. It is sectional drawing which fractures | ruptures and shows a part of opening part of the building using the lighting surface material concerning further another embodiment of this invention. It is sectional drawing of the lighting surface material of a proposal example. It is sectional drawing of the lighting surface material of a proposal example.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an opening of a building using the daylighting material. The daylighting face material 1 is a face material that is provided in an opening 11 of a building and closes the opening 11 to take in outdoor light indoors. In this example, the daylighting face material 1 is attached in a window door frame 12 to form a window door 13, and the window door 13 is provided in the opening frame 11 a of the opening 11. The opening 11 in the figure is a window opening provided on the outer wall surface of the building. The window door 13 may be a hinged door, a sliding door, or another opening / closing type door. The building provided with the opening 11 may be any of a detached house, an apartment house, an office building, etc., and may be a building having any construction method.

  The daylighting surface material 1 has a pair glass structure including an outdoor side plate 2 and an indoor side plate 3 made of a multi-layer glass plate or the like, and an air layer 4 interposed therebetween. The outdoor side plate 2 and the indoor side plate 3 may be other than glass as long as they have optical properties to be described later. For example, synthetic resins such as acrylic resins can be used.

  The outdoor plate 2 is made of a non-diffusible translucent material, and a heat ray shielding film 5 is formed on the surface facing the air layer 4. Specifically, the outdoor side plate 2 is formed by interposing a translucent security film 8 between the two translucent plates 2a and 2a. As the translucent plate 2a, for example, a plate material such as a single plate of transparent glass or transparent acrylic resin is used. The security film 8 is made of a transparent resin film or the like. The heat ray shielding film 5 is formed by depositing a metal or a metal oxide on the surface of the glass which is the transparent plate 2a of the outdoor side plate 2 by vapor deposition or the like. The glass with the heat ray shielding film 5 formed on the surface is called heat ray shielding glass, Low-E glass, or the like, and has a function of passing near infrared rays but not mid-infrared rays and far infrared rays.

  The indoor side plate 3 is a diffusion plate that diffuses transmitted light, and a refractive material layer 9 that refracts and transmits incident light is provided on the surface facing the air layer 4. As the indoor side plate 3 made of the diffusion plate, for example, a single plate of ground glass is used, but in addition to this, a transparent glass having a diffusion film having a light diffusion property on one surface, or a transmitted light diffusion property synthesis. A resin plate may be used. In the configuration of the daylighting surface material 1, a diffusion plate having a relatively weak diffusion effect may be used for the indoor side plate 3.

  In this example, the refractive material layer 9 is provided so as to have a refractive property that refracts incident light upward. In this example, the refractive material layer 9 is a refractive film and is adhered to the indoor side plate 3 with an adhesive. As the refractive film used as the refractive material layer 9, for example, a refractive film mainly composed of a synthetic resin such as a commercially available acrylic resin can be used. The refractive material layer 9 is not limited to a refractive film, and may be a layer coated with a refractive material, for example.

As shown in FIG. 9, the outdoor side plate 2 is composed of a single translucent plate, and a heat ray shielding film 5 may be formed on the surface facing the air layer 4.
Further, as shown in FIG. 10, the outdoor side plate 2 may be a single layer similarly to the example of FIG. 9, and the indoor side plate 3 may be a plurality of layers. The indoor side plate 3 in FIG. 1 includes a non-diffusible light transmitting plate 6 disposed on the air layer 4 side and a diffusion plate 7 disposed on the indoor side for diffusing transmitted light. A security film 8 is interposed between the diffusion plate 7 and the diffusion plate 7. As the translucent plate 6, a plate material such as a single plate of transparent glass or transparent acrylic resin is used in the same manner as the transparent plate 2 a of the outdoor side plate 2. As the diffusing plate 7, a single frosted glass is used. Alternatively, a transparent glass having a light diffusing film attached to one surface or a transmitted light diffusing synthetic resin plate may be used. good. The security film 8 is made of a resin film or the like as in the example of FIG. In addition, also in the configuration of the daylighting surface material 1 in this embodiment, the diffusion plate 7 having a relatively weak diffusion effect may be used.

The effect | action of the opening part structure provided with the window door 13 using the lighting surface material 1 of the said structure is demonstrated.
As shown in FIG. 1, when the light from the sun S at a high position is taken into the room through the opening 11, the light of the sun S enters the lighting surface material 1 downward. The incident light L1 passes through the outdoor plate 2 of the lighting surface material 1 and hits the heat ray shielding film 5, and a part of the light rays L2 such as mid-infrared rays and far infrared rays in the incident light L1 are reflected by the heat ray shielding film 5. The incident light L1 ′ that has passed through the heat ray shielding film 5 without being reflected strikes the refractive material layer 9 and is refracted to become upward light L3. The upward light L3 becomes diffused light L4 when it passes through the light transmitting plate 6 and then passes through the indoor side plate 3 made of a diffusion plate.

  In this way, the incident light L1 ′ is refracted upward by the refractive film 9, so that the ceiling light 14 in the room is illuminated with the skylight HL and the light reflected by the ceiling surface 14 is reflected in the room as shown in FIG. It reaches to the back. Therefore, compared with the conventional opening part structure (FIG. 2 (B)) using the lighting surface material 1C which consists only of a transparent glass plate, a feeling of indoor brightness can be improved markedly. For this reason, by using the daylighting surface material 1 shown in FIG. 1 for the opening 11, the room can be kept bright even in an environment where sunlight does not directly hit the window.

  Moreover, the sky light HL near the zenith can be taken into the room by using the refraction by the refraction film 9 and the reflection at the ceiling surface 14 together. Sky light HL close to the zenith has a high color temperature (6000 K or more) and a refreshing feeling. It has been confirmed that when the skylight HL is taken into the room, it increases by several hundred K (depending on the weather and time zone) as compared with the case where light other than the skylight HL is taken in. For this reason, by utilizing the skylight HL, it is possible to further increase the brightness of the room and create a refreshing atmosphere.

  Furthermore, in FIG. 1, by diffusing the light L3 with the diffusion plate serving as the indoor side plate 3, the phenomenon that the outside scenery appears to be reversed due to the refraction of the light by the refractive material layer 9 is prevented, and the visual discomfort is felt. It can be lost. In addition, when the light L3 is diffused, the entire window surface can be seen from the indoor side so as to emit light with soft light, and a calm atmosphere can be obtained.

  Since the light L3 transmitted through the refractive material layer 9 is diffused by the indoor side plate 3 made of a diffusion plate, the indoor side plate 3 relieves the prism phenomenon of the rainbow-like light pattern generated in the transmitted light by transmitting through the refractive material layer 9. Can deliver light without a sense of incongruity in the room. In addition, natural light enters the eyes of the resident, so that the circadian rhythm can be adjusted, contributing to health.

  The proposed daylighting surface material 1B shown in FIG. 12 is provided with the refractive material layer 9 on the surface facing the air layer 4 of the outdoor plate 2, whereas the daylighting surface material 1 shown in FIG. 9 is provided on the surface of the indoor side plate 3 facing the air layer 4. This causes a difference in the light refraction characteristics. Therefore, this difference was confirmed by a test.

  3A is a graph showing the relationship between the emission angle and the visible light transmittance due to the difference in the incident angle of the lighting surface material 1 shown in FIG. 9, and FIG. 3B is the same relationship of the lighting surface material 1B shown in FIG. It is a graph which shows. However, the daylighting surface material 1 and the daylighting surface material 1B both use the refractive material layer 9 having the same specifications.

  As can be seen from the graphs of FIGS. 3A and 3B, the lighting surface material 1 shown in FIG. 9 refracts the light, although the angle of the emitted light is slightly different from the lighting surface material 1B shown in FIG. The light emission performance does not change, and there is a tendency to emit light over a slightly wide range. For this reason, in the lighting surface material 1 shown in FIG. 9, FIG. 1, or FIG. 10, the indoor side plate 3 may have a relatively weak diffusion effect.

Regarding the heat insulation / heat shielding property of the daylighting surface material 1, in addition to the pair glass structure, by providing the heat ray shielding film 5, the heat insulation property is high and the heat shielding property is obtained. Since the location where the heat ray shielding film 5 is provided is a surface facing the air layer 4 of the outdoor side plate 2, the heat shielding effect is enhanced.
In addition, since the refractive material layer 9 is provided on the indoor side plate 3, it is less susceptible to the influence of solar heat from the outside as compared to the case where it is provided on the outdoor side plate 2. Therefore, the adhesion surface of the refractive material layer 9 is hardly deteriorated. When the refractive material layer 9 is a film, the problem of deterioration due to solar heat on the adhesive surface of the film is particularly large. However, even if the refractive material layer 9 is a refractive film, the concern about deterioration is solved. Therefore, while providing a refraction material layer with a paired glass structure to improve the light intake property, the heat ray shielding film 5 is provided without causing the problem of deterioration due to solar heat, making it a heat shielding type, and also for use in humid areas Can be suitable.

  Moreover, in the example of FIG. 1, since the outdoor side plate 2 has the security film 8 interposed between the two translucent plates 2a and 2a, the opening is easy even if the daylighting surface material 1 is cracked. Without being formed, the crime prevention effect can be improved. The example of FIG. 10 can also increase the crime prevention effect with the crime prevention film 8 as described above. When the crime prevention film 8 is included, the opening is not easily opened even if the daylighting material 1 is cracked, so that the crime prevention effect can be improved. The face material 1 can be applied, and the improvement of light intake and the heat shielding type can be achieved.

  FIG. 4 shows the daylighting effect of an example of the opening structure of the building 10 in which the daylighting surface material 1 is used as the opening 11 in an example of a room of a general LDK plan. 4A shows a longitudinal sectional view of the building 10, and FIG. 4C shows a horizontal section thereof. FIG. 4B shows a horizontal cross-sectional view in the case where a lighting surface material made only of a transparent glass plate is used for the opening 11 in the same building 10. The part which attached | subjected the hatching of the broken line in each figure shows the range which the light which injected from the outdoors does not reach.

  As shown also in FIG. 1, in the opening part structure which closes the opening part 11 located in the wall surface of the building 10 with the window door 13 using the said lighting surface material 1, as shown in FIG. The light L1 incident downward from the sun S to the daylighting surface material 1 of the opening 11 is refracted upward and reaches the interior of the room as diffused light L4. As in 4 (C), the entire room can be sufficiently brightened to improve the feeling of brightness. In the example shown in the figure, a living / dining part LD is provided adjacent to the opening 11 and a kitchen K is provided on the back side. However, the kitchen K is brightened so that the user can work comfortably. .

  On the other hand, when the opening portion 11 is closed with the conventional window door 23 using the daylighting surface material 1B made of only a transparent glass plate, the light L1 that has entered the opening portion 11 goes straight as it is. As shown in FIG. 4B, the light L5 that has traveled straight does not reach the interior kitchen K, and the entire room becomes dark.

As shown in each example in FIGS. 4 to 6, since a suitable refraction angle is different depending on the position and shape of the opening 11, a refractive film 9 having a suitable emission angle (that is, a refraction angle) is used.
FIG. 5 shows a longitudinal sectional view of another example of the opening structure of the building 10 in which the daylighting surface material 1 is used for the opening 11. In this opening structure, the position of the opening 11 is lower than in the case of FIG. Therefore, when the opening 11 is closed by the conventional window 23 (FIG. 4) using the daylighting surface material 1 </ b> C (FIG. 4) made of only a transparent glass plate, the sun S located at a high position is changed to the opening 11. The light L1 that has entered downward travels straight, and the light L5 that has passed through the daylighting surface material 1C only irradiates a portion of the floor surface in the room, compared to the case of FIG. 4 where the opening 11 is at a high position. The whole room gets darker.

  Therefore, in the opening structure of the embodiment of FIG. 5, the opening 11 is closed by the window door 13 using the lighting surface material 1 shown in FIG. 1, and the exit angle of the refractive film 9 constituting the lighting surface material 1 is set. 4 is larger than the case of FIG. That is, the angle at which the incident light L1 is refracted upward by the refractive film 9 is made larger than in the example of FIG. For this reason, the light L1 that has entered the opening 11 downward is refracted upward by a sufficient angle by the lighting surface material 1 and reaches the interior of the room as diffused light L4, so that the walls and ceiling become bright. The whole room can be bright enough.

  FIG. 6 shows a sectional view of still another example of the opening structure of the building 10 using the daylighting face material 1 as the opening 11. This opening part structure is the structure which closes the opening part 11 opened to the wall surface of the building 10 by the window doors 13 and 23 divided up and down, Comprising: The window doors 13 and 23 are made into the raising / lowering door, for example. In this example, a window door 13 using the daylighting surface material 1 is provided in the lower part of the opening 11, and a conventional window door using the daylighting surface material 1 B made of only a transparent glass plate in the upper part of the opening 11. 23 is provided.

  In this opening structure, the light L1 incident downward on the window door 13 provided in the lower portion of the opening 11 is refracted upward to become diffused light L4, and illuminates the indoor wall or ceiling. On the other hand, the light L1 incident downward on the window door 23 provided in the upper portion of the opening 11 travels straight and illuminates the indoor floor. Therefore, not only indoor walls and ceilings but also the floor surface can be illuminated, and the indoor space becomes brighter and the feeling of brightness can be improved.

  FIG. 7 shows a longitudinal sectional view of still another example of the opening structure of the building 10 using the daylighting face material 1 as the opening 11. Even in this opening structure, the window 11 using the daylighting surface material 1 shown in FIG. 1 is provided in the opening 11 that opens to the wall surface of the building 10, and the remaining part of the opening 11 is a daylighting surface made of only a transparent glass plate. A conventional window door 23 using the material 1C is provided. In particular, in this example, the upper part, the middle part, and the lower part of the opening 11 are divided into three parts, and a window door 13 using the lighting surface material 1 shown in FIG. A conventional window door 23 using only a transparent glass plate is provided in the lower part.

  In this opening part structure, since the window door 13 using the lighting surface material 1 shown in FIG. 1 is used in the intermediate part of the opening part 11 in the height direction, incident light L1 from the outside is provided in the intermediate part of the opening part 11. Will be refracted upward and enter the room, and will not only have the same function as a window using opaque glass as a lighting surface material for the purpose of blindfolding, but also the function of incorporating natural light deep into the room. become. Light L1 from the outside goes straight from the window doors 23 provided in the upper part and the lower part of the opening 11 and enters the room. Thereby, indoor space can be made bright enough and a comfortable indoor environment can be made.

  FIG. 8 shows another example of the opening structure. In the example of the figure, there are a plurality of openings 11 of the building 10, and each of the openings 11 is closed by the window door 13 using the lighting surface material 1 shown in FIG. Depending on the position, the refractive index of the refractive material layer 9 in each daylighting surface material 1 is made different from each other.

  In the case of this configuration, since the emission angle of the incident light from the opening 11 is made different according to the position of the opening 11, from any opening 11 depending on the lighting conditions such as sunlight of each opening 11. Can also reach the interior of the room. In addition, it is possible to illuminate the floor, walls, and ceiling of the room evenly with no excess or deficiency.

DESCRIPTION OF SYMBOLS 1 ... Daylighting surface material 2 ... Outdoor side board 2a ... Translucent board 3 ... Indoor side board 4 ... Air layer 5 ... Heat ray shielding film 6 ... Translucent board 7 ... Diffusion board 8 ... Security film 9 ... Refractive material layer 11 ... Opening part

Claims (6)

A multi-layer daylighting material provided in an opening of a building to close the opening and take outdoor light indoors,
At least a multi-layer or single-layer outdoor plate made of a non-diffusible light-transmitting material provided on the outdoor side, and a diffusion plate provided on the indoor side with an air layer separated from the outdoor plate to diffuse transmitted light A multi-layer or single-layer indoor side plate, a refractive material layer that is provided on a surface of the indoor side plate facing the air layer and refracts incident light, and is provided on a surface of the outdoor side plate facing the air layer. A daylighting surface material comprising the heat ray shielding film formed.   The daylighting surface material according to claim 1, wherein the outdoor side plate has a light-transmitting crime prevention film interposed between two light-transmitting plates.   The daylighting surface material according to claim 1, wherein the indoor side plate includes a non-diffusible translucent plate and a diffuser plate that diffuses transmitted light, and a security film is interposed between the translucent plate and the diffuser plate. Daylighting material.   The lighting surface material according to any one of claims 1 to 3, wherein the refractive material layer is a refraction film.   The daylighting surface material according to any one of claims 1 to 4, wherein the opening for providing the daylighting surface material is an opening in a wall surface of a building, and the refractive material layer is formed from the outdoor side. A daylighting surface material having a refractive property that refracts incident light transmitted downward through a light-transmitting plate upward.   The opening structure of the building which provided the lighting surface material of any one of Claim 1 thru | or 5 in the opening part of the building.

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