JP5077039B2 - Daylighting equipment - Google Patents

Description

  The present invention relates to a daylighting apparatus that introduces light into a building.

2. Description of the Related Art Conventionally, there has been disclosed a daylighting apparatus in which an optical duct is installed outside a building, and a light outlet of the optical duct is installed at a location away from the building window so that sunlight enters the building (Patent Document 1). In addition, a daylighting apparatus is disclosed in which a light emission port of an optical duct is installed in close contact with a window of a building to allow sunlight to enter the building (see Patent Document 2).
Japanese Utility Model Publication No. 51-106135 Japanese Utility Model Publication No. 51-93113

In the daylighting apparatus described in Patent Document 1, since the light emission port is installed apart from the window, the light diffuses while entering the window from the light emission port, and the sunlight that enters the building from the window The amount was decreasing.
Further, in the daylighting apparatus described in Patent Document 2, since the light emission port is installed in close contact with the window, sunlight can be taken only from the light duct, and sunlight can be taken from the window. It was.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a daylighting apparatus that can take in sunlight from a window while taking in sunlight from an optical duct.

In order to solve the above problems, the present invention is lighted with a bay window unit projecting outwardly from the outer wall surface of a building, and a light duct having one end attached to the outer wall of the building is opened to the outside of the building The bay window unit includes an upper part and a lower part projecting from a housing of the building, a window part and a side part installed between the upper part and the lower part, the upper part, the lower part, or the side. an opening which opens in at least one of the parts has and a lid covering the opening in an openable and closable, wherein the light duct, the lighting port opened to the outside of the building, communicating with the opening A light exit, and a translucent cover that covers the light exit, the light exiting from the light duct into the light exit unit is reflected toward the indoor side of the building. A reflective member is provided, Serial reflecting member, at least one of the window or the sides while being installed to allow ventilation, and characterized in that it is removably installed in the bay window unit.

According to the present invention, output window unit includes an upper, lower or an opening which opens in at least one of the sides, the light duct is provided with the light radiation opening that communicates with the opening, the light While taking sunlight from the duct, it is also possible to take sunlight from the window.

Further , according to the present invention, the bay window unit is provided with a reflecting member that reflects the light incident from the optical duct into the bay window unit toward the indoor side of the building, and the reflecting member includes: since at least one of the window or the side is installed to allow ventilation, while ensuring the ventilation of windows, it is possible to efficiently guide the incident sunlight from the light duct into the room.
Furthermore, according to the present invention, since the optical duct is attached to the outer wall of the building, it can be easily installed in an existing building.

  Moreover, it is preferable that the said reflection member is formed in the shape which can ventilate. If it does in this way, the sunlight which injects into a room from an optical duct can be led efficiently, ensuring air permeability of a window.

  Moreover, it is preferable that the said reflection member consists of a diffuse reflection board. In this way, sunlight that enters the bay window unit from the light duct and is reflected by the diffuse reflector spreads uniformly toward the room, so that unevenness of sunlight can be eliminated and the entire room can be made uniform. Can be brightened.

  The optical duct is preferably composed of a honeycomb panel. If it does in this way, since it will become possible to aim at the weight reduction of an optical duct, handling will become easy and the working efficiency at the time of lighting apparatus installation will improve. Moreover, since it can fully cope with the load resistance of the existing building, the degree of freedom of installation in the existing building is increased.

  Moreover, it is preferable that the said optical duct is comprised by the heat insulation panel. If it does in this way, it will become possible to prevent dew condensation on the reflective surface of an optical duct, and it can control the fall of lighting efficiency.

  The inner surfaces of the reflecting member and the optical duct are preferably made of a metal material or a resin material. If it does in this way, if a material with especially high reflectance is used among metal materials and resin materials, it can be led to the room, without attenuating the sunlight taken in with the optical duct.

  According to the daylighting apparatus according to the present invention, it is possible to take in sunlight from a window while taking in sunlight from an optical duct.

  Next, embodiments of the present invention will be described with reference to the drawings as appropriate. In this embodiment, a case where the present invention is applied to a bay window of a detached house will be described as an example. In the following description, a detached house is referred to as “building T”.

  As shown in FIG. 1, the daylighting apparatus 1 according to the first embodiment mainly includes a bay window unit 2 and an optical duct 3.

  As shown in FIGS. 1 and 2, the bay window unit 2 has a trapezoidal shape in plan view, and is formed so as to protrude from the outer wall surface of the building T. That is, as shown in FIG. 2, the bay window unit 2 is provided so as to protrude from the opening K provided in the building housing to the outside of the building, the frame 4 projecting from the building housing, and the frame 4. An upper part 5 attached to the upper surface of the frame 4, a lower part 6 attached to the lower surface of the frame 4, a side part 7 A installed between the upper part 5 and the lower part 6 and attached to the side surface of the frame 4, 4, and a window portion 7 </ b> B installed between the upper portion 5 and the lower portion 6. In the present embodiment, the building frame is a wall, column, beam, or the like of the building. Hereinafter, it is simply referred to as “an enclosure”.

  As shown in FIG. 2, the frame 4 is made of an extruded material made of aluminum alloy, and is fixed to the housing so as to surround the opening K formed in the housing of the building T. The pair of sleeve frame units U1, U1 It is mainly composed of U1 and a front frame unit U2.

  As shown in FIG. 2, the sleeve frame unit U1 includes a vertical frame 4A attached to the housing along the opening K, a vertical frame 4B that is spaced from the vertical frame 4A, a vertical frame 4A, and a vertical frame. The upper sleeve 4C spanned between the upper ends of 4B and the lower sleeve frame 4D spanned between the lower ends of the vertical frame 4A and the vertical 4B are combined in a square frame shape. The vertical frame 4A is connected to the vertical 4B through the sleeve upper frame 4C and the sleeve lower frame 4D. The vertical frame 4A and the vertical 4B are mechanically joined to the sleeve upper frame 4C and the sleeve lower frame 4D by screws or the like, and the vertical frame 4A is mechanically fixed to the casing by screws or the like.

  The front frame unit U2 is composed of a front upper frame 4E and a front lower frame 4F spanned between the upper ends and the lower ends of the pair of uprights 4B, 4B, respectively, and combined in a square frame shape. The front upper frame 4E and the front lower frame 4F are joined to the verticals 4B and 4B. In the present embodiment, the vertical frame 4B of the sleeve frame unit U1 is also used as the vertical frame of the front frame unit U2.

  The upper portion 5 has a trapezoidal shape in plan view, and includes, for example, a top plate and a roof cover. The upper portion 5 is provided so as to cover the upper surface of the frame 4 and is mechanically fixed to the frame 4 by, for example, screwing. The upper part 5 is provided with an opening 5A penetrating in the vertical direction. In this embodiment, the opening 5A has a quadrangular shape in plan view.

  The lower part 6 has a trapezoidal shape in plan view, and includes, for example, a cradle cover and a base plate. The lower portion 6 is provided so as to cover the lower surface of the frame 4 and is mechanically fixed to the frame 4 by, for example, screwing. In addition, the lower part 6 of this embodiment is provided in parallel with facing the upper part 5.

  In this embodiment, the side portion 7A is a window, has a substantially rectangular shape in front view, and is formed of, for example, a glass plate. The side portion 7A of the present embodiment is an open window and is provided so as to be openable and closable. Further, the side portion 7A is disposed between the upper portion 5 and the lower portion 6 and is disposed on both sides of the window portion 7B. The side portion 7A is opposed to the letter C across the opening surface of the housing.

  The window portion 7B has a substantially rectangular shape when viewed from the front, and is formed of, for example, a glass plate. The window portion 7B of the present embodiment is a sliding window and is provided so as to be opened and closed. In addition, the window portion 7B is disposed between the upper portion 5 and the lower portion 6, and is disposed between the pair of side portions 7A and 7A, and is disposed in parallel to the opening surface of the housing.

  The light duct 3 plays a role of guiding sunlight into the building T. As shown in FIG. 1, the optical duct 3 is attached to the outer wall along the height direction of the building T. The optical duct 3 is fixed to the outer wall of the building T via a fixing member R. A reflection surface is provided on the inner surface of the optical duct 3. The reflecting surface is formed of, for example, a metal material or a resin material, and it is particularly preferable to use an aluminum alloy from the viewpoint of weight reduction and corrosion resistance.

  The optical duct 3 includes a lighting port 3A and a light emitting port 3B. That is, the lighting port 3 </ b> A (one end) of the optical duct 3 is open to a place outside the building, and the light emission port 3 </ b> B (the other end) is in communication with the opening 5 </ b> A provided in the upper portion 5. Although illustration is omitted, the lighting port 3A and the light emission port 3B of the light duct are covered with a translucent cover made of a translucent material. The optical duct 3 may be attached to the bay window unit 2 by, for example, mechanical joining such as screwing or by means such as an adhesive. With this configuration, sunlight that has entered the lighting port 3A of the light duct 3 travels through the light duct 3 while being repeatedly reflected, is emitted into the bay window unit 2 through the light emission port 3B, and enters the building T.

  According to the lighting device 1 according to the first embodiment described above, since the light duct 3 is connected to the opening 5A of the bay window unit 2, the side portion 7A and the window are taken in while taking sunlight from the light duct 3. Sunlight can also be taken from the part 7B.

  Moreover, since the optical duct 3 does not enter the field of view when the side part 7A and the window part 7B are viewed from the indoor side, the view from the side part 7A and the window part 7B is not impaired.

Moreover, the optical duct 3 is attached to the outer wall of the building T, and can be easily installed in the existing building. That is, since the optical duct 3 can be attached to the outer wall of the building T, it can be installed in an existing building.
Further, by configuring the inner surface of the optical duct 3 with a material having a particularly high reflectance among metal materials, resin materials, and the like, the sunlight taken in by the optical duct 3 can be guided to the room without being attenuated.

  In the present embodiment, the frame 4 is made of an aluminum alloy, but is not limited to this and may be appropriately changed. For example, you may form from metal materials, such as another nonferrous metal and stainless steel, and you may form from what has a high heat insulation effect compared with aluminum alloys, such as a synthetic resin and a synthetic wood.

  Further, the shape and number of the opening 5A of the upper portion 5 may be appropriately changed as long as it matches the shape and number of the optical duct 3.

  Moreover, in this embodiment, although the opening part 5A was installed in the approximate center of the longitudinal direction of the upper part 5, you may install in the vicinity of either one of the side parts 7A and 7A, without being limited to this.

  Moreover, in this embodiment, although the opening part 5A was provided in a part of the upper part 5, you may open the upper part 5 whole. That is, you may open | release without installing a top plate etc. in the upper surface of the bay window unit 2, and may install the light emission port 3B so that it may fit in the opening surface. If it does in this way, more sunlight can be taken in into the building T. FIG.

  Moreover, an opening part may be provided in the lower part 6 and the optical duct 3 may be connected to the lower part 6, or an opening part may be provided in the side part 7A and the optical duct 3 may be connected to the side part 7A. Moreover, you may combine installation of the opening part in the upper part 5, the lower part 6, and the side part 7A. For example, both the upper part 5 and the lower part 6 may be provided with openings, and the optical duct 3 may be connected to both openings, or the upper part 5, the lower part 6, and the side part 7A may be provided with openings. The optical duct 3 may be connected to all the openings. Moreover, you may provide an opening part in both side part 7A, 7A, and may provide an opening part in either one.

  Further, an openable / closable lid may be provided in the opening 5A. In this way, when it is desired to take sunlight from the light duct 3 into the room, the lid is opened, and when it is not desired to take sunlight from the light duct 3 into the room, the lid can be closed to shield the light. The degree of freedom of daylighting from the duct 3 is increased.

  Further, the side portions 7A and 7A of the present embodiment are windows, but may be walls. Further, any one of the side portions 7A may be a window, and any one of the side portions 7A may be a wall.

  In the present embodiment, the side portions 7A and 7A are open windows, and the window portion 7B is a sliding window. However, the present invention is not limited to this, and a known window type is appropriately selected and used. Can do. For example, the side windows 7A and the windows 7B are made the same window type by appropriately selecting from sliding windows, open windows, raising / lowering windows (vertical window), FIX windows (fitting window), etc. Alternatively, different window formats may be combined. Moreover, you may make a pair of side part 7A and 7A into a different window form, respectively. For example, one side 7A may be an open window, and the other side 7A may be a raising / lowering window. Moreover, you may provide a shoji, a screen door, a surface lattice, a decoration lattice, etc. in the side part 7A and the window part 7B.

  In addition, a sealing material may be interposed between the lighting port 3A or the light emission port 3B of the light duct 3 and the light transmission cover, or the light transmission cover and the bay window unit 2 on the light emission port 3B side of the light duct 3. A sealing material may be interposed between the two.

  Moreover, the optical duct 3 may be comprised with a honeycomb panel. If it does in this way, since it becomes possible to achieve weight reduction of the optical duct 3, handling will become easy and the working efficiency at the time of the daylighting apparatus 1 installation will improve. Moreover, since it can fully cope with the load resistance of the existing building, the degree of freedom of installation in the existing building is increased.

  Moreover, the optical duct 3 may be comprised with the heat insulation panel. If it does in this way, it will become possible to prevent dew condensation on the reflective surface of optical duct 3, and it can control the fall of lighting efficiency.

  Moreover, although illustration is abbreviate | omitted, the sun tracking apparatus may be provided in the lighting port 3A of the optical duct 3, and the optical duct 3 may be attached to the inside of the building T.

  In the present embodiment, the case where one bay window unit 2 is installed in the building T has been described. However, when there are a plurality of bay window units 2, an optical duct 3 may be installed for each bay window unit 2. And the edge part of the one optical duct 3 may be branched, the several light emission port 3B may be formed, and it may connect with the opening part of the some bay window unit 2. FIG. If it does in this way, since the number of the optical duct 3 can be reduced, the construction cost and construction effort of the optical duct 3 can be reduced.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the description of the daylighting apparatus 1 according to the second embodiment, the description of the same parts as those of the daylighting apparatus 1 according to the first embodiment is omitted.

  The daylighting apparatus 1 according to the second embodiment is different from the first embodiment in that a reflecting member 8 is installed.

  The reflecting member 8 plays a role of reflecting sunlight incident from the light duct 3 into the bay window unit 2 toward the indoor side of the building T. As shown in FIG. 3, the reflecting member 8 has a rectangular shape in front view. For example, the reflecting member 8 is formed by depositing a metal such as aluminum or silver on one side of a glass plate, or metal on both sides of a resin material such as plastic or polyester film. It consists of what vapor-deposited. In addition, the reflecting surface of the reflecting member 8 is formed so as to diffusely reflect light in this embodiment. That is, the reflecting member 8 of the present embodiment is composed of a diffusive reflecting plate in which fine irregularities are formed on the reflecting surface.

  Here, a method of forming the diffuse reflector will be described. First, a reflecting member having a smooth reflecting surface is prepared, and the reflecting surface is subjected to blasting or the like to form fine irregularities. Next, the reflective surface (layer) is formed by vapor deposition or sputtering after the irregularities are formed, or a white-colored coating film is formed on the reflective surface (layer) after the irregularities are formed. Through the above steps, a diffuse reflector that diffuses sunlight hitting the reflecting surface is completed. Note that the diffuse reflector may be formed by other known methods.

  The reflecting member 8 is installed in the bay window unit 2 and covers the entire area of the window portion 7B and is inclined with respect to the window portion 7B. In other words, the reflecting member 8 is installed between the upper part 5 and the lower part 6 and is installed so as to be inclined so as to be able to reflect sunlight incident from the light duct 3 into the bay window unit 2 to the indoor side. The upper end of the reflecting member 8 is fixed to the opening edge portion of the opening 5A, and the lower end is fixed to the upper surface of the lower portion 6, and is fixed by, for example, mechanical joining such as screwing or an adhesive. .

According to the lighting device 1 according to the second embodiment described above, since the light duct 3 is connected to the opening 5A of the bay window unit 2, the sunlight is taken from the light duct 3 and also from the side portion 7A. Sunlight can be introduced.
Further, since the reflecting member 8 is installed in the bay window unit 2 so that the side portion 7A can be ventilated, the reflecting member 8 enters the bay window unit 2 from the optical duct 3 while ensuring the ventilation of the side portion 7A. Sunlight can be efficiently guided into the room of the building T.

  Further, since the reflecting member 8 is made of a diffuse reflector, the sunlight that enters the bay window unit 2 from the optical duct 3 and is reflected by the diffuse reflector spreads uniformly toward the room. Can be eliminated, and the entire room can be uniformly brightened.

  In addition, the reflecting member 8 is made of a material having a high reflectance among a metal material and a resin material, and can guide the sunlight taken in by the light duct 3 to the room without being attenuated.

  In the present embodiment, the diffusive reflecting plate having fine irregularities formed on the reflecting surface is used. However, the present invention is not limited to this. For example, the reflecting member 8 having a smooth reflecting surface may be used. Absent.

  Further, the shape of the reflecting member 8 is not limited to this embodiment, and may be changed as appropriate. For example, as shown in FIG. If it does in this way, it will become possible to take in outside diffused light also from the window part 7B, and to ensure the view from the window part 7B. Moreover, the sunlight which injects into the bay window unit 2 from the light duct 3 can be efficiently guide | induced to the room | chamber interior of the building T, ensuring the ventilation property of the window part 7B. In addition, since the clearance gap is formed between the reflection member 8 and the window part 7B, the key G of the window part 7B can be operated and it becomes possible to open and close.

  As shown in FIG. 5A, a plurality of through holes 8A, 8A,... If it does in this way, the sunlight which injects into a room from the optical duct 3 can be efficiently guide | induced, ensuring the ventilation property of the window part 7B more. The shape, size, and number of the through holes 8A are not limited to this, and may be changed as appropriate.

  Moreover, as shown in FIG.5 (b), you may make the shape of the reflection member 8 into a blind shape. If it does in this way, the sunlight which injects into a room from the optical duct 3 can be efficiently guide | induced, ensuring the ventilation property of the window part 7B more. Moreover, since it can bring out a stylish atmosphere if it is made into a blind shape, it is suitable also in design.

  Further, as other shapes that allow ventilation, for example, a slit-shaped gap may be formed in the reflecting member 8, or a louver shape or the like may be formed. Even if it does in this way, the sunlight which injects into the room | chamber interior from the optical duct 3 can be guide | induced efficiently, ensuring the ventilation property of the window part 7B more.

  In addition, as shown in FIG. 6A, the reflecting member 8 may be formed below half the height of the window portion 7B in the vertical direction. If it does in this way, while ensuring the ventilation property of window part 7B, while being able to guide the sunlight which injects indoors from optical duct 3 efficiently, the view from window part 7B is not spoiled.

  Moreover, the installation location of the reflecting member 8 is not limited to this embodiment, and may be changed as appropriate. For example, as shown in FIG. 6B, if the opening 5A is provided in the vicinity of the side portion 7A, the reflecting member 8 may be installed only in one of the windows 7B. If it does in this way, while ensuring the ventilation property of the window part 7B, while being able to guide the sunlight which injects indoors from the optical duct 3 efficiently, the opening and closing of the window part 7B can be performed more simply. In addition, when the opening part 5A is provided in the lower part 6 or the side part 7A, the installation location of the reflecting member 8 is appropriately changed so that sunlight can be reflected indoors.

  Further, the reflecting member 8 may be installed without being fixed to the upper part 5 and the lower part 6 with an adhesive or the like. For example, a stand may be provided on the back surface of the reflecting member 8, and the reflecting member 8 may be supported by the stand. If it does in this way, installation and removal of reflection member 8 will become easy, and the freedom degree of installation will increase.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In the description of the daylighting apparatus 1 according to the third embodiment, the description of the same parts as those of the daylighting apparatus 1 according to the first and second embodiments is omitted. Moreover, Fig.8 (a) is a top view of the lighting device 1 of FIG. 7, (b) is a front view when it sees from the indoor side.

  The daylighting apparatus 1 according to the third embodiment is characterized in that the light duct 3 is mounted on the bay window units 2 and 2 with the light duct 3 lying sideways.

  As shown in FIG. 7, the daylighting apparatus 1 according to the third embodiment connects one optical duct 3 to a plurality of bay window units 2 and 2. As shown in FIG. 7, one end of the optical duct 3 is formed in a shape that protrudes from the outer wall surface on the entrance side and is cut off obliquely so that sunlight L can be easily taken. As shown in FIG. 8, the other end of the optical duct 3 is closed, and the body is provided with light emission ports 3B and 3B. The light emission openings 3B and 3B communicate with the openings 5A and 5A of the bay window units 2 and 2, respectively. As shown in FIG. 8 (b), reflectors 3C and 3C are provided in an inclined manner at the respective light emission openings 3B and 3B. The upper end of the reflecting plate 3C is provided with a gap from the upper surface in the optical duct 3, and the lower end is fixed to the opening end of the light emission port 3B. The number of bay window units 2 is not limited to this, and may be three or more.

  With this configuration, as shown in FIG. 8B, the sunlight L that has entered the lighting port 3A travels through the light duct 3 while being repeatedly reflected, and a part of the sunlight L is reflected by the reflector 3C. Thus, the light is emitted from the light emission port 3B into the bay window unit 2 through the opening 5A. The remaining sunlight L also travels through the optical duct 3 while being repeatedly reflected, and is reflected by the reflecting plate 3C on the other end side of the optical duct 3, and is then exited from the light exit 3B through the opening 5A. 2 is emitted.

According to the lighting device 1 according to the third embodiment described above, by providing the light duct 3 in the bay window unit 2, it becomes possible to lay the light duct 3 horizontally (as a result), and as a result, the bay window unit. Even when there are a plurality of two, it is only necessary to install one optical duct 3, so that the construction cost and labor can be reduced.
Moreover, not only the view from the first floor bay window, but also the view from the second floor window is not impaired. That is, as shown in FIG. 7, when the bay window unit 2 is on the first floor of the building T and the second floor window is directly above the bay window unit 2, if the light duct 3 is installed vertically, the window from the second floor window The view will be damaged, but with this structure, the view from the second floor window will not be damaged.

  Although the embodiments of the present invention have been described above, it goes without saying that the embodiments can be appropriately modified and implemented without departing from the spirit of the present invention. In the present embodiment, the present invention is used for a detached house. However, for example, it may be used for an apartment or an apartment.

  In the present embodiment, the present invention is used for the bay window unit 2 having a trapezoidal shape in plan view. It may be used for the bay window unit 2 such as a window).

It is a whole perspective view which shows the installation state of the lighting apparatus which concerns on this embodiment. It is a perspective view which shows the structure of the lighting apparatus which concerns on 1st Embodiment. It is a perspective view which shows the structure of the lighting apparatus which concerns on 2nd Embodiment. It is a perspective view which shows the structure of the reflection member which concerns on a 1st modification. (A) is a perspective view which shows the structure of the reflective member which concerns on a 2nd modification, (b) is a perspective view which shows the structure of the reflective member which concerns on a 3rd modification. (A) is a front view which shows the structure of the reflective member which concerns on a 4th modification, (b) is a front view which shows the structure of the reflective member which concerns on a 5th modification. It is a whole perspective view which shows the installation state of the lighting apparatus which concerns on 3rd Embodiment. (A) is a top view of the lighting apparatus of FIG. 7, (b) is a front view when it sees from the indoor side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Daylighting device 2 Bay window unit 3 Light duct 3A Daylighting port 3B Light emission port 4 Frame 5 Upper part 5A Opening part 6 Lower part 7A Side part 7B Window part 8 Reflective member T Building

Claims (6)

A bay window unit projecting outwardly from the outer wall surface of a building, one end attached to the outer wall of the building a lighting device and a light duct is opened to the outside of the building,
The bay window unit includes at least one of an upper part and a lower part projecting from the housing of the building, a window part and a side part installed between the upper part and the lower part, and the upper part, the lower part, or the side part. And an opening that opens to one, and a lid that covers the opening so as to be openable and closable ,
The light duct includes a daylight opening that opens to the outside of the building , a light emission port that communicates with the opening, and a translucent cover that covers the light emission port,
The bay window unit is provided with a reflecting member that reflects light incident from the light duct into the bay window unit toward the indoor side of the building,
The said reflection member is installed so that at least one of the said window part or the said side part can ventilate, and is installed in the said bay window unit so that attachment or detachment is possible, The lighting device characterized by the above-mentioned . The daylighting apparatus according to claim 1, wherein the reflecting member is formed in a shape allowing ventilation. The reflecting member, lighting apparatus according to claim 1 or claim 2, characterized in that it consists of diffuse reflector. The daylighting device according to any one of claims 1 to 3 , wherein the light duct is formed of a honeycomb panel. The said light duct is comprised with the heat insulation panel, The lighting device as described in any one of the Claims 1 thru | or 4 characterized by the above-mentioned. The daylighting device according to any one of claims 1 to 5 , wherein inner surfaces of the reflecting member and the optical duct are made of a metal material or a resin material.

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