JP2014207119A - Daylighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a daylighting apparatus capable of taking a sufficient amount of light indoors while suppressing the position of the top end of a reflection member from being excessively high.SOLUTION: A daylighting apparatus 1 includes a reflection member 100 arranged more outward than an opening part formed at a building outside wall WL and reflecting outdoor light toward the opening part. When the reflection member 100 is seen from the side surface, a reflection surface 110 of the reflection member 100 is formed so that an angle formed relative to a horizontal surface in a reflection direction on a first reflection surface 111 at the lower side near the opening part is smaller than that in a reflection direction on a second reflection surface 112 at an upper side farther from the opening part, when a direction where parallel light incident vertically downwards is reflected, is defined as the reflection direction.

Description

  The present invention relates to a daylighting apparatus for taking outdoor light indoors through an opening formed in an outer wall of a building.

  Conventionally, indoor lighting is secured by attaching a daylighting device for taking outdoor light (sunlight) indoors in the vicinity of an opening of a building (for example, a portion where a window is attached). ing. For example, Patent Document 1 described below describes a daylighting apparatus having a configuration in which a reflecting member is disposed outside an opening of a building and sunlight incident on the reflecting member is reflected indoors. The daylighting apparatus having such a configuration can take in more light indoors by using a reflecting member as compared with the case where sunlight directly enters the opening of the building.

  Patent Document 2 below describes a daylighting apparatus that can always take light indoors regardless of the position of the sun by changing the angle of the reflecting member with time.

  By the way, in a densely populated area, the distance between buildings is short, and it is difficult for sunlight to reach the lower floor of the building (directly). In such a place where sunlight is difficult to reach, the indoor brightness cannot be sufficiently ensured even in the daytime, so that the necessity of installing a lighting device is particularly high. Patent Document 3 listed below describes a daylighting apparatus that is installed in a place where sunlight is difficult to reach directly and reflects skylight to be taken indoors. Skylight does not reach directly from the sun (linearly), but reaches the surface after being scattered by atmospheric water vapor, dust, etc., or after being reflected from the clouds It means sunlight.

JP 2009-76212 A JP 2007-115417 A JP 2004-214188 A

  Sky light is weaker than light directly reaching from the sun (hereinafter also referred to as direct light). For this reason, in order to capture a lot of light and to ensure sufficient indoor brightness, it is necessary to increase the size of the reflection member of the daylighting device described in Patent Document 3 and to enlarge the opening of the building. There seems to be.

  However, if the opening of the building is made large, there is a problem that it becomes difficult to ensure privacy in addition to the deterioration of the heat insulation and crime prevention of the building. For this reason, the opening of the building must be as small as possible.

  Therefore, as one method for capturing a lot of skylight without enlarging the opening of the building, the reflecting surface of the reflecting member is not a flat surface but a concave curved surface (the center of the reflecting surface faces the outdoor side). A curved surface that recedes), and the reflected light is converged to pass through the opening.

  However, in this case, the slope of the lowermost region of the reflecting surface, that is, the slope of the region closest to the opening portion approaches the horizontal. When sky light is incident on such a region from above, the light reflected by the region may hit the inner wall surface (top surface) of the opening, and may not reach the interior. In other words, a part of the light reflected by the reflecting surface may not reach the indoors, and a part of the reflecting surface may not be used effectively. Such a phenomenon is not preferable from the viewpoint of reducing the size of the reflecting member disposed on the outdoor side as much as possible while adopting a configuration for taking a sufficient amount of light indoors.

  In order to effectively use the entire reflecting surface, it is conceivable that the reflecting surface is inclined more greatly. That is, it can be considered that the angle formed by the (average) normal direction of the entire reflecting surface with respect to the horizontal plane is made smaller. However, in such a structure, since the height from the lower end of an opening part to the upper end of a reflection member becomes large too much, there exists a problem that the design property when it sees from the indoor side will fall.

  The present invention has been made in view of such a problem, and the purpose thereof is daylighting capable of taking a sufficient amount of light indoors while suppressing the position of the upper end of the reflecting member from becoming too high. To provide an apparatus.

  In order to solve the above problems, a daylighting apparatus according to the present invention is a daylighting apparatus for taking outdoor light indoors through an opening formed on an outer wall of a building, and directs outdoor light to the opening. So that the reflecting surface is inclined with respect to a horizontal plane, and when the reflecting member is viewed from the side, the reflecting surface is vertically downward. When the direction in which the parallel light incident toward is defined as a reflection direction, the reflection direction in the lower region near the opening is greater than the reflection direction in the upper region far from the opening. It is characterized in that it is formed to be small at an angle formed with respect to a horizontal plane.

  In this invention, it has a reflection member which is arrange | positioned in the outdoor side rather than the opening part formed in the building outer wall, and reflects outdoor light toward an opening part. The reflected light can be taken indoors through the opening by reflecting the sky light vertically downward along the outer wall of the building.

  Here, the direction in which the parallel light incident on the specific area of the reflecting surface is reflected downward is defined as the “reflection direction” in the area. When the reflecting member is viewed from the side, the reflecting surface of the reflecting member is an angle formed by the reflecting direction in the lower region near the opening with respect to the horizontal plane than the reflecting direction in the upper region far from the opening. It is formed so as to be small.

  Since the reflecting surface is formed in this way, when parallel light enters vertically downward, the traveling direction of the light reflected in the lowermost region (region close to the opening) of the reflecting surface Will approach the level. As a result, since it is suppressed that a part of reflected light hits the inner wall surface (top surface) of the opening existing above the region, it is possible to make the entire reflected light reach indoors. Become.

  Moreover, it is only the area | region of the lower side that makes the angle which a reflection direction makes with respect to a horizontal surface small instead of the whole reflection surface. Therefore, the position of the upper end of the reflecting member does not become too high, and thereby the design property when viewed from the indoor side is not deteriorated. Thus, according to the present invention, a sufficient amount of light can be taken indoors while suppressing the position of the upper end of the reflecting member from becoming too high.

  Further, in the daylighting device according to the present invention, when the reflecting member is viewed from the side, the reflecting surface is located on the first region which is the lowermost region and on the first region above the first region. It is also preferable that the first region has a length along the horizontal direction of the first region and is shorter than the length of the second region along the horizontal direction.

  Of the reflective surfaces, the reflected light may strike the inner wall surface (top surface) of the opening only in the relatively narrow region on the lowermost side. Therefore, in this preferred embodiment, the first region, which is the lowermost region of the reflective surface and the angle of reflection with respect to the horizontal plane is small, is narrower than the second region adjacent to the upper side. . Specifically, the length along the horizontal direction of the first region is shorter than the length along the horizontal direction of the second region. Since the first region where the vertical dimension becomes larger by bringing the reflection direction closer to the horizontal can be set to the minimum necessary range, it is possible to further suppress the position of the upper end of the reflection member from becoming too high. Can do.

  In the daylighting apparatus according to the present invention, it is also preferable that the second region has a concave curve such that a central portion thereof recedes toward the outdoor side when the reflecting member is viewed from the side. .

  In this preferred embodiment, the shape of the second region when the reflecting member is viewed from the side is a shape that forms a concave curve such that the central portion thereof recedes toward the outdoor side. By making the second region occupying most of the reflecting surface into such a shape, most of the reflected light passes through the opening of the outer wall of the building while converging, and then advances while spreading indoors. For this reason, many lights can be taken in indoors, without enlarging an opening part.

  In the daylighting apparatus according to the present invention, it is also preferable that the first region has a concave curve such that a central portion thereof recedes toward the outdoor side when the reflecting member is viewed from the side. .

  In this preferred embodiment, the shape of the first region when the reflecting member is viewed from the side is also a shape that forms a concave curve such that the central portion thereof recedes toward the outdoor side, as in the case of the second region. It has become. By making the first region also have such a shape, all reflected light passes through the opening of the outer wall of the building while converging, and then proceeds while spreading toward the inside. For this reason, many lights can be taken in indoors, without enlarging an opening part.

  In the daylighting apparatus according to the present invention, when parallel light is incident vertically downward on the entire reflecting surface, the light that travels while spreading toward the interior after being reflected at the first region is first. When the reflected light is reflected in the second region and then travels while spreading toward the indoors as the second reflected light, the reflecting surface has the first reflected light and the second reflected light. It is also preferred that at least a part of each is formed indoors so as to overlap each other.

  In this preferable aspect, the reflection surface is formed so that the first reflected light reflected in the first region and the second reflected light reflected in the second region overlap each other indoors. ing. The first reflected light is light that travels while spreading indoors after being reflected by the concave first region when parallel light traveling vertically downward is incident on the entire reflecting surface. The second reflected light is light that spreads indoors after being reflected in the concave second region when parallel light traveling vertically downward is incident on the entire reflecting surface.

  Since the two reflected lights (first reflected light and second reflected light) taken indoors spread in a state of overlapping each other, it is possible to further ensure the brightness in a wide indoor range.

  In the daylighting apparatus according to the present invention, the reflecting surface includes the first reflected light and the second reflected light overlapping each other in a part of the indoor space, and the first reflected light or the surroundings around the space. It is also preferable that only one of the second reflected lights is formed.

  In this preferable aspect, the reflection surface is formed so that the first reflected light reflected in the first region and the second reflected light reflected in the second region overlap each other in a part of the indoor space. Yes. In addition, a reflective surface is formed around the space so that only one of the first reflected light and the second reflected light reaches.

  With such a configuration, while indoor, the first reflected light and the second reflected light overlap each other in a part of the space, while the first reflected light or the second reflected light above and below the space. Only the reflected light arrives.

  As a result, the indoor space is divided into a space where the amount of light taken from outside (the brightest space) is large, a space above and below it and a relatively small amount of light taken from outdoors, and further above and below it. Therefore, it is divided into a space (the darkest space) where the light taken in from outside does not reach directly. Since the brightest space and the darkest space are not adjacent to each other and the distribution of the light quantity in the space is continuous, the distribution of the light quantity indoors can be made natural.

  In the daylighting apparatus according to the present invention, it is also preferable that the reflection surface is formed so that the reflection direction in all regions thereof is a direction upward from the horizontal direction.

  In this preferred embodiment, the reflection surface is formed so that the reflection direction in all the regions is directed upward from the horizontal direction. With such a configuration, the parallel light incident on the reflection surface vertically downward travels indoors so as to be higher than the lower end of the opening. For this reason, it can suppress that reflected light injects directly into the eyes of the consumer in an indoor, and gives discomfort.

  According to the present invention, it is possible to provide a daylighting apparatus that can capture a sufficient amount of light indoors while suppressing the position of the upper end of the reflecting member from becoming too high.

It is a perspective view which shows a mode that the state which the lighting apparatus which concerns on one Embodiment of this invention was attached to the building outer wall was seen from the upper side. It is a perspective view which shows a mode that the state which the lighting apparatus which concerns on one Embodiment of this invention was attached to the building outer wall was seen from the downward side. It is a figure for demonstrating the shape of a reflection member and a reflective surface among the lighting apparatuses shown in FIG. It is a figure which shows typically the path | route of the light taken in indoors by the lighting apparatus shown in FIG. It is a figure which shows typically the path | route of the light taken in indoors by the lighting apparatus shown in FIG. It is a figure which shows typically the path | route of the light taken in indoors by the lighting apparatus which concerns on another embodiment of this invention. It is a figure which shows typically the path | route of the light taken in indoors by the lighting apparatus which concerns on the 1st comparative example of this invention. It is a figure which shows typically the path | route of the light taken in indoors by the lighting apparatus which concerns on the 2nd comparative example of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  The configuration of the daylighting apparatus 1 according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a state in which the daylighting apparatus 1 is attached to the building outer wall WL as viewed from above. FIG. 2 is a perspective view showing a state in which the daylighting apparatus 1 is attached to the building outer wall WL as viewed from below. As shown in FIGS. 1 and 2, the daylighting apparatus 1 is fixed to the building outer wall WL below and behind the sliding window WD attached to the opening of the building outer wall WL.

  The sliding window WD includes two sash frames WF that can slide in parallel with the building outer wall WL, and a glass plate GL that is held by each sash frame. Since the said glass plate GL is transparent, even if it is the state which closed the sliding window WD, light can permeate | transmit toward the indoor from the outdoors here now.

  In FIG. 1, the normal direction of the building outer wall WL is the x direction, and the x axis is set along the direction. Further, the left direction (horizontal direction perpendicular to the x direction) when facing the x direction is defined as the y direction, and the y axis is set along the direction. Furthermore, the direction going vertically upward is defined as the z direction, and the z axis is set along the direction. In the subsequent drawings and description, the x direction, y direction, and z direction are defined in the same manner as described above, and the x axis, y axis, and z axis are set in the same manner as described above.

  The daylighting apparatus 1 includes a reflecting member 100 and support members 201 and 202. The reflecting member 100 is a member that reflects outdoor light and allows the reflected light to enter the indoor through the sliding window WD. The reflection member 100 is a substantially rectangular plate-like body in a top view, and an end portion closer to the building outer wall WL is positioned below and an end portion farther from the building outer wall WL (end portion in the x direction). Is arranged in an inclined state so as to be positioned above. The entire upper surface (inner side surface) of the reflecting member 100 is mirror-finished to form a reflecting surface 110.

  The reflective surface 110 has a shape such that the normal line at an arbitrary point is parallel to the xz plane. In other words, the shape is such that the y-direction component of the normal at any point is zero. For this reason, when the reflecting member 100 is viewed along the y direction (when viewed from the side), the reflecting surface 110 is linear.

  The reflective surface 110 is a first reflective surface 111 that is a region below the boundary line BL that is horizontal and parallel to the building outer wall WL (a side closer to the sliding window WD), and above the boundary line BL ( And a second reflecting surface 112 which is a region far from the sliding window WD. The length of the first reflecting surface 111 along the x direction is shorter than the length of the second reflecting surface 112 along the x direction.

  A portion of the reflecting member 100 below the boundary line BL has a curved shape that is curved so that the central portion of the reflecting member 100 recedes toward the outdoor side when viewed along the y direction. For this reason, the first reflecting surface 111 is also a curved line having a curved shape (in a concave shape).

  The portion above the boundary line BL of the reflecting member 100 is a curved curve that is curved so that the central portion thereof is retracted toward the outdoor side when viewed along the y direction. For this reason, the second reflecting surface 112 is also a curved line having a curved shape (in a concave shape).

  The first reflecting surface 111 and the second reflecting surface 112 are formed so as to be smooth curved surfaces, respectively, but the connecting portion between the boundary lines BL is not smooth. The reflective surface 110 has a shape such that the normal direction thereof changes discontinuously along the boundary line BL.

  Each of the support members 201 and 202 is a member for supporting and fixing the reflecting member 100 from below, and one end (lower end) is fastened and fixed to the building outer wall WL, and the other end (upper end) is fixed. The reflection member 100 is fastened and fixed to the lower surface (the surface opposite to the reflection surface 110). The support member 201 supports the vicinity of the right end portion of the reflecting member when facing the x direction from below, and the support member 202 positions the vicinity of the left end portion of the reflecting member when facing the x direction. I support from.

  Specific shapes of the reflecting member 100 and the reflecting surface 110 will be described with reference to FIG. FIG. 3 is a diagram for explaining the shapes of the reflection surface 100 and the reflection surface 110, and schematically shows a state in which the reflection member 100 is viewed from the side along the y direction. In FIG. 3, illustrations other than the reflecting member 100 are omitted.

  As already described, the reflecting surface 110 has the first reflecting surface 111 and the second reflecting surface 112, and these two regions are adjacent to each other across the boundary line BL. The point A shown in FIG. 3 is the side of the lower end of the first reflecting surface 111 viewed from the side. Point B is a view of the upper side of the first reflecting surface 111 (the boundary line BL and the lower side of the second reflecting surface 112) viewed from the side. Point C is the side of the upper end of the second reflecting surface 112 viewed from the side.

  By the way, the daylighting apparatus 1 is attached to a place where the light from the sun is difficult to reach directly because the distance from the building opposite to the window WD is short. For this reason, most of the light on the outdoor side (x direction side) of the building outer wall WL can be regarded as sky light that goes vertically downward (−z direction) along the building outer wall WL. In addition, since the position of the sun changes with time, depending on the season and time zone, there may be a case where light from the sun directly reaches the outdoor side of the building outer wall WL. Even in this case, the light has a component that goes vertically downward along the building outer wall WL.

  That is, in any case, most of the light on the outdoor side of the building outer wall WL may be regarded as parallel light traveling vertically downward along the building outer wall WL. Therefore, in the following description, it is assumed that all the light incident on the reflecting surface 110 is parallel light directed vertically downward along the building outer wall WL. In FIG. 3, the path of light incident on the reflecting surface 110 out of such parallel light is drawn as incident optical paths IL10 and IL20 by two dotted lines. Needless to say, there are innumerable incident optical paths parallel to these other than the incident optical paths IL10 indicated by these dotted lines. The incident optical path IL10 represents an incident optical path incident on the first reflecting surface 111 out of the infinite number of incident optical paths. The incident optical path IL20 represents an incident optical path incident on the second reflecting surface 112 out of the infinite number of incident optical paths.

  Since the first reflecting surface 111 is a curved surface, the direction in which parallel light incident on a specific region (not a point) is reflected is not determined in one direction, but is actually reflected in an infinite number of directions. In the following description, one direction in which the light reflected by the region travels on average is defined as the “reflection direction” in the region.

  A straight line VL1 shown in FIG. 3 indicates a plane (virtual flat surface) perpendicular to the average normal direction NL1 obtained by averaging the normal directions at the respective points on the first reflecting surface 111. Yes. In FIG. 3 showing the present embodiment, the straight line VL1 coincides with the straight line connecting the point A and the point B.

  The reflected light path RL10 indicates a path of reflected light reflected by the flat surface when light enters the virtual flat surface along the incident light path IL10. That is, the direction of the reflection optical path RL10 is equal to the reflection direction on the first reflection surface 111.

  A straight line VL2 shown in FIG. 3 indicates a plane (virtual flat surface) perpendicular to the average normal direction NL2 obtained by averaging the normal directions at the respective points on the second reflecting surface 112. Yes. In FIG. 3 showing the present embodiment, the straight line VL2 coincides with the straight line connecting the point B and the point C.

  The reflected light path RL20 indicates a path of reflected light reflected by the flat surface when light is incident on the virtual flat surface along the incident light path IL20. That is, the direction of the reflection optical path RL20 is equal to the reflection direction on the second reflection surface 112.

  As shown in FIG. 3, the angle θ1 formed by the reflection direction (the direction of the reflection optical path RL10) on the first reflection surface 111 with respect to the horizontal plane HL is the reflection direction (the direction of the reflection optical path RL20) on the second reflection surface 112. It is smaller than the angle θ2 formed with respect to the horizontal plane HL. For this reason, the light reflected by the first reflecting surface 111 travels indoors at an angle closer to the horizontal (on average) than the light reflected by the second reflecting surface 112.

  The effect of configuring the shape of the reflective surface 110 in this way will be described. FIG. 7 is a diagram schematically showing a path of light taken indoors by the daylighting apparatus 1a according to the first comparative example with the present invention. The daylighting apparatus 1a differs from the daylighting apparatus 1 only in the shapes of the reflecting member 100a and the reflecting surface 110a, and the other configurations are the same. As shown in FIG. 7, the reflection surface 110 a has a curved shape that is curved so that the central portion thereof is retracted toward the outdoor side when viewed along the y direction. Unlike the reflecting surface 110, the reflecting surface 110a is a smooth curved surface as a whole, and there is no boundary line on the reflecting surface 110a whose normal direction changes discontinuously.

  In the daylighting apparatus 1a, since the reflecting surface 110a is a concave curved surface, the slope of the lowermost region of the reflecting surface 110a, that is, the slope of the region closest to the sliding window WD is horizontal. It is approaching. When sky light is incident on such a region from above, the light reflected in the region may not reach the indoors.

  FIG. 7 shows an example in which such a phenomenon occurs. Along the incident optical path IL22, the light incident on the end of the reflecting surface 110a far from the building outer wall WL (the end in the x direction) travels along the reflected optical path RL22, passes through the glass plate GL, and is indoors. To reach.

  However, along the incident optical path IL11 and the incident optical path IL13, light incident on the reflective surface 110a in a region near the building outer wall WL proceeds along the reflected optical path RL11 and the reflected optical path RL13, respectively, and the top surface of the opening (this embodiment). In the form, it hits the boundary portion WFT between the glass plate GL and the sash frame WF) and cannot reach indoors. This is due to the fact that in the region of the reflective surface 110a close to the building outer wall WL, the angle formed by the reflection direction of the region with respect to the horizontal plane is relatively large (close to 90 degrees).

  As a result, in the daylighting apparatus 1a, a part of the light reflected by the reflecting surface 110a does not reach indoors, and a part of the reflecting surface 110a is not effectively used. Such a phenomenon is not preferable from the viewpoint of reducing the size of the reflecting member 100a disposed on the outdoor side as much as possible while being configured to take a sufficient amount of light indoors.

  Therefore, in order to effectively use the entire reflecting surface 110a, it is conceivable to further incline the reflecting surface 110a. That is, it is conceivable that the angle formed by the (average) normal direction of the entire reflecting surface 110a with respect to the horizontal plane is made smaller.

  FIG. 8 is a diagram schematically showing the path of light taken indoors by the daylighting apparatus 1b according to the second comparative example with the present invention. The daylighting apparatus 1b differs from the daylighting apparatus 1b only in the inclination of the reflecting surface 110b, and the other configurations are the same. As shown in FIG. 8, the daylighting apparatus 1b has a configuration in which the reflecting member 100a of the daylighting apparatus 1a shown in FIG.

  As shown in FIG. 8, along the incident light path IL23, the light incident on the end portion (end portion in the x direction) far from the building outer wall WL in the reflecting surface 110b travels along the reflected light path RL23. It penetrates the glass plate GL and reaches indoors. In addition, the light incident on the end of the reflecting surface 110b closer to the building outer wall WL along the incident light path IL11 also travels along the reflected light path RL11, passes through the glass plate GL, and reaches indoors. In this way, all the light incident on the reflecting surface 110b passes through the glass plate GL and reaches indoors.

  However, as is clear from a comparison between FIG. 7 and FIG. 8, the height from the lower end to the upper end of the reflecting member 100b is higher than the height from the lower end to the upper end of the reflecting member 100a. For this reason, the sliding window WD is covered with the reflecting member 100b over a wide range from the lower end to the upper side, and the designability when viewed from the indoor side is degraded.

  In addition, sky light is incident on the reflecting surface 110a in a wide range from the incident optical path IL11 to the incident optical path IL22, whereas the reflecting surface 110b is only in a narrow range from the incident optical path IL11 to the incident optical path IL23. Sky light is not incident. For this reason, the amount of light that is reflected by the reflecting surface 110b and reaches indoors is reduced.

  If the same amount of light as in the case of the reflecting surface 110a is to reach indoors, it is necessary to extend the upper end of the reflecting surface 110b further upward as indicated by reference numeral 100ex in FIG. However, in this case, the design when viewed from the indoor side is further deteriorated.

  Therefore, in this preferred embodiment, by devising the shape of the region on the sliding window WD side (first reflective surface 111) of the reflective surface 110, while suppressing the position of the upper end of the reflective member 100 from becoming too high. However, a sufficient amount of light can be taken indoors. FIG. 4 is a diagram schematically showing the path of light taken indoors by the daylighting apparatus 1. In order to avoid complexity, the support members 201 and 202 are not shown in FIG. In addition, the structure of the sliding window WD is schematically illustrated. The same applies to FIG. 5 described later.

  The length along the horizontal direction of the reflective surface 110 is substantially equal to the length along the horizontal direction of the reflective surface 110a shown in FIG. Therefore, sky light is incident on the reflecting surface 110 in a wide range from the incident light path IL11 to the incident light path IL22. In FIG. 3, a path of light that is incident on a position slightly indoors with respect to the boundary line BL in the reflecting surface 110 is depicted as an incident optical path IL12. Further, the path of reflected light when light is incident along the incident optical path IL12 is depicted as a reflected optical path RL12.

  In addition, a path of light incident on the reflection surface 110 at a position slightly closer to the x direction than the boundary line BL is depicted as an incident light path IL21. Further, the path of the reflected light when light is incident along the incident optical path IL21 is depicted as a reflected optical path RL21.

  As described with reference to FIG. 3, the reflection direction of the region on the sliding window WD side (first reflection surface 111) of the reflection surface 110 is closer to the horizontal than in the case of FIG. Yes. For this reason, the direction (reflected light path RL11, reflected light path RL12) in which the light reflected on the first reflecting surface 111 travels is closer to the horizontal than in the case of FIG. As a result, the light reflected by the first reflecting surface 111 does not hit the boundary portion WFT, but all of it passes through the glass plate GL and reaches the indoors.

  On the other hand, about the 2nd reflective surface 112 among the reflective surfaces 110, it has the same arrangement | positioning as the reflective surface 110a shown in FIG. The light incident on the upper end portion (point C) of the second reflecting surface 112 along the incident light path IL11 is reflected by the second reflecting surface 112 and then travels along the reflected light path RL22 as in the case of FIG. It penetrates the glass plate GL and reaches indoors. The light incident on the vicinity of the lower end (point B) of the second reflecting surface 112 along the incident light path IL21 is reflected by the second reflecting surface 112, and then travels along the reflected light path RL21 and is transmitted through the glass plate GL. And reach indoors. As a result, all of the light reflected by the second reflecting surface 112 passes through the glass plate GL and reaches indoors.

  As described above, according to the daylighting apparatus 1 according to the present embodiment, by reducing the angle formed by the reflection direction of the first reflection surface 111 with respect to the horizontal plane, all the light incident on and reflected by the reflection surface 110 is reflected. Can be reached indoors. Moreover, it is only the area | region (1st reflective surface 111) below rather than the whole reflective surface 110 that makes the angle which a reflection direction makes with respect to a horizontal surface small. Therefore, the position (point C) of the upper end of the reflecting member 100 does not become too high, and this prevents the design from being viewed from the indoor side. Thus, according to the lighting device 1, it is possible to take in a sufficient amount of light indoors while suppressing the position of the upper end of the reflecting member 100 from becoming too high.

  As shown in FIG. 7, it is only a relatively narrow region on the lowermost side of the reflecting surface 110a that the reflected light may hit the inner wall surface (boundary portion WFT) of the opening. Therefore, in the daylighting apparatus 1, when the reflecting member 100 is viewed from the y direction, the length along the horizontal direction (x direction) of the first reflecting surface 111 is the horizontal direction (x direction) of the second reflecting surface 112. It is shorter than the length along. Since the region (the first reflecting surface 111) in which the dimension in the vertical direction becomes large by bringing the reflecting direction closer to the horizontal is set to the minimum necessary range, the position of the upper end (point C) of the reflecting member 100 becomes high. It is possible to further suppress the excess.

  FIG. 5 is a diagram schematically showing the path of light taken indoors by the daylighting apparatus 1, as in FIG. 4. In FIG. 5, the traveling direction of light indoors is drawn over a wider range than in FIG. 4.

  Each of the first reflecting surface 111 and the second reflecting surface 112 is a concave curved surface whose central portion is retracted toward the outdoor side. For this reason, the light reflected in each passes through the sliding window WD while converging, and then travels while spreading toward the indoor.

  In FIG. 5, a reflected light path RL <b> 11 is a path of light reflected at the lower end portion of the first reflecting surface 111. The reflected light path RL12 is a path of light reflected in the vicinity of the upper end portion of the first reflecting surface 111. The reflected light path RL21 is a path of light reflected in the vicinity of the lower end portion of the second reflecting surface 112. The reflected light path RL22 is a path of light reflected by the upper end portion of the second reflecting surface 112.

  As shown in FIG. 5, the light (first reflected light) that travels while being reflected indoors after being reflected by the first reflecting surface 111 and the light that is reflected indoors after being reflected by the second reflecting surface 112. There is a traveling light (second reflected light). In FIG. 5, the range of the first reflected light is indicated by an arrow A1. Further, the range of the second reflected light is indicated by an arrow A2.

  The indoor space includes an area AR10 where the first reflected light and the second reflected light overlap each other, areas AR21 and AR22 where only the second reflected light reaches, the first reflected light and the second reflected light. These areas are divided into areas AR31 and AR32 that are not reached. The area AR21 is an area adjacent to the area AR10 on the upper side. The area AR31 is an area adjacent to the area AR21 on the upper side. The area AR22 is an area adjacent to the area AR10 on the lower side. The area AR32 is an area adjacent to the area AR22 on the lower side.

  Thus, in the indoor space, the brightest region (region AR10) and the darkest region (region AR31, region AR32) are not adjacent to each other, and the light quantity distribution in the space is continuous. For this reason, the distribution of light quantity indoors is natural.

  Further, as shown in FIG. 5, all the light reflected by the reflecting surface 110 is in a direction in which the traveling direction is higher than the horizontal direction. By forming the reflecting surface 110 in this way, the reflected light that has reached the indoors travels upward from the lower end of the sliding window WD. For this reason, it is suppressed that reflected light is directly incident on the eyes of consumers indoors and gives discomfort.

  A method for forming the reflecting member 100 will be briefly described. The reflecting member 100 is formed by forming a plate-like base material by extrusion molding of a resin, and attaching a single aluminum sheet to one entire surface of the base material. The glossy surface of the aluminum sheet is a reflective surface 110.

  Thus, the part in which the 1st reflective surface 111 is formed, and the part in which the 2nd reflective surface 112 is formed are integrally formed instead of a separate body. For this reason, the intensity | strength of the reflection member 100 whole is maintained.

  In addition to the above method, the substrate may be formed by metal press molding. In this case, since processing strength is imparted to the base material, the strength of the entire reflecting member 100 can be further improved.

  Next, a daylighting apparatus 1c according to another embodiment of the present invention will be described with reference to FIG. FIG. 6 schematically shows a path of light taken indoors by the daylighting apparatus 1c. The daylighting apparatus 1c differs from the daylighting apparatus 1 only in the inclination of the first reflecting surface 111c of the reflecting surface 110c, and has the same configuration as the daylighting apparatus 1 for the other parts. As shown in FIG. 6, the first reflecting surface 111 c has a gentler inclination than the first reflecting surface 111 c of the daylighting apparatus 1 a shown in FIG. 5 (so that the average normal direction is directed upward). Is placed in the state.

  Each of the first reflecting surface 111c and the second reflecting surface 112c is a concave curved surface such that the central portion thereof is retracted toward the outdoor side. For this reason, the light reflected in each passes through the sliding window WD while converging, and then travels while spreading toward the indoor.

  In FIG. 6, a reflected light path RL11 is a path of light reflected by the lower end portion of the first reflecting surface 111c. The reflected light path RL12 is a path of light reflected in the vicinity of the upper end portion of the first reflecting surface 111c. The reflected light path RL21 is a path of light reflected in the vicinity of the lower end portion of the second reflecting surface 112c. The reflected light path RL22 is a path of light reflected by the upper end portion of the second reflecting surface 112c.

  As shown in FIG. 6, the light that travels toward the indoors after being reflected by the first reflecting surface 111 c (first reflected light) and the light that propagates toward the indoors after being reflected by the second reflecting surface 112 c There is a traveling light (second reflected light). In FIG. 6, the range of the first reflected light is indicated by an arrow A1. Further, the range of the second reflected light is indicated by an arrow A2.

  The indoor space includes an area AR10 where the first reflected light and the second reflected light overlap each other, an area AR21 where only the first reflected light reaches, and an area where only the second reflected light reaches. It is divided into AR22 and areas AR31 and AR32 where neither the first reflected light nor the second reflected light reaches. The area AR21 is an area adjacent to the area AR10 on the upper side. The area AR31 is an area adjacent to the area AR21 on the upper side. The area AR22 is an area adjacent to the area AR10 on the lower side. The area AR32 is an area adjacent to the area AR22 on the lower side.

  In this way, the light reaches a wider range in the indoor space as compared with the case where only the second reflected light reaches. In other words, the reflection surface 110c has a wider range than the range indicated by the arrow A2 in FIG. 6 (the range indicated by the arrow A2 in FIG. 6 plus the range indicated by the arrow A1 in FIG. 6). The reflected light has reached. In addition to the mode shown in FIG. 6, by adjusting the shapes of the first reflecting surface 111c and the second reflecting surface 112c, in addition to the range indicated by the arrow A2 in FIG. The reach of light indoors can be adjusted as appropriate, such as by illuminating.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

1, 1a, 1b, 1c: Daylighting device 100, 100a, 100b, 100c: Reflecting member 110, 110a, 110b, 110c: Reflecting surface 111, 111c: First reflecting surface 112, 112c: Second reflecting surface 201, 202: Support member WD: sliding window WF: sash frame GL: glass plate WFT: boundary WL: building outer wall

Claims (7)

A daylighting device for taking outdoor light indoors through an opening formed in the outer wall of the building,
In order to reflect outdoor light toward the opening, the reflective surface is provided with a reflective member disposed on the outdoor side in a state where the reflective surface is inclined with respect to a horizontal plane,
When the reflective member is viewed from the side, the reflective surface is
When the direction in which the parallel light incident vertically downward is reflected is defined as the reflection direction,
The reflection direction in the lower region near the opening is formed to be smaller at an angle formed with respect to the horizontal plane than the reflection direction in the upper region far from the opening. Daylighting equipment. When the reflective member is viewed from the side,
The reflective surface has a first region that is a lowermost region, and a second region that is adjacent to the first region on the upper side of the first region,
The lighting device according to claim 1, wherein a length of the first region along the horizontal direction is shorter than a length of the second region along the horizontal direction. When the reflective member is viewed from the side,
The daylighting apparatus according to claim 2, wherein the second region has a concave curve such that a central portion thereof recedes toward the outdoor side. When the reflective member is viewed from the side,
The lighting device according to claim 3, wherein the first region has a concave curve such that a central portion thereof recedes toward the outdoor side. In the case where parallel light is incident vertically downward on the entire reflecting surface,
After being reflected in the first region, the light that travels while spreading indoors is the first reflected light,
After being reflected in the second region, and the light that travels while spreading indoors as the second reflected light,
The reflective surface is
The daylighting apparatus according to claim 4, wherein the first reflected light and the second reflected light are formed so that at least a part of each of them overlaps with each other indoors. The reflective surface is
The first reflected light and the second reflected light overlap each other in a part of the indoor space, and only one of the first reflected light or the second reflected light reaches the periphery of the space. The daylighting device according to claim 5, wherein the daylighting device is formed as follows. The reflective surface is
The daylighting device according to any one of claims 1 to 6, wherein the reflection direction in all the regions is formed to be a direction upward from the horizontal direction.

Images