JP2013247034A - Daylighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a daylighting device capable of carrying out sufficient daylighting without widening an opening of a building even in a place where direct sunlight does not reach and sky light has to be relied upon for getting daylighting.SOLUTION: A daylighting device 1 has a first reflecting member 10 which is installed on the outside of an opening A of a building 2 and reflects light incident from an upper part to enter into the building 2 through the opening A and a second reflecting member 11 which is installed on the inside of the opening A of the building 2 and reflects light incident from the first reflecting member 10 to the upper part or lower part. The first reflecting member 10 has a reflection surface 20 of a parabolic shape on which the reflection light forms a focal point S. The second reflecting member 11 has a reflection surface 40 of a parabolic shape which reflects light forming a focal point S as collimated light.

Description

  The present invention relates to a daylighting apparatus for taking outside light into a building through an opening provided on the outer wall of the building.

  Conventionally, a building equipped with a daylighting device has been proposed in order to take sunlight into the building. This type of daylighting apparatus uses a reflector to take light into the building from an opening having a window of the building (see Patent Documents 1 to 3).

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

  However, the above-described daylighting device is premised on using direct light from the sun, that is, direct sunlight. For this reason, for example, the space between buildings is narrow, such as the space between houses built on a small site in an urban area, and the distance from the roof is long, so it is difficult for direct sunlight to reach the first floor of the building. Even if an opening such as a window is provided in a place where only the sky light other than the above reaches, the light to be taken in becomes very weak, and sufficient lighting from the opening cannot be expected. In addition, when the opening is enlarged in order to increase the amount of light collected, other performances such as heat insulation and crime prevention of the building are deteriorated. In particular, in a building that is close to the adjacent building, it is conceivable that the inside of each other becomes fully visible through the opening provided in the opposing wall. From this point of view, it is required to make the opening as small as possible.

  Skylight generally refers to light other than direct sunlight that is diffused by water vapor, dust, etc. in the atmosphere or reflected from the clouds and reaches the ground. The component is mainly vertical light perpendicular to the ground, and includes diffused light that diffuses in other directions as a component. In the present specification, the vertical light is also referred to as parallel light from the viewpoint of being parallel to each other.

  The present invention has been made in view of such a point, and provides a daylighting apparatus that can perform sufficient daylighting without widening an opening even in a place where daylighting should be examined by relying on skylight. Is the purpose.

  The present invention for achieving the above object is a daylighting device for taking in light from the outside through an opening provided on an outer wall of a building, provided outside the opening of the building, A first reflecting member that reflects light incident from the first reflecting member and enters the building through the opening, and is provided inside the opening of the building and reflects light incident from the first reflecting member upward or downward. And a second reflecting member that has a parabolic reflecting surface on which the reflected light forms a focal point.

  According to the present invention, outside light can be collected using the first reflecting member having a parabolic reflecting surface, and the light can be incident on the building through the opening, so that direct sunlight does not reach to obtain light. Even in places where it is necessary to rely on skylight, sufficient lighting can be performed without widening the opening. In addition, since the light is reflected upward or downward by the second reflecting member, it is possible to suppress the light collected by the reflecting surface of the first reflecting member from directly entering the eyes of the person in the building, and to improve the comfortability. High lighting can be realized.

  The focal point of the first reflecting member may be provided at a position where all light incident on the reflecting surface of the first reflecting member vertically from the upper side enters the building through the opening. In such a case, light incident vertically downward from above can be efficiently taken into the building. Therefore, sufficient lighting can be realized even in a building where the space between adjacent buildings is narrow and only skylight is incident from above.

  The second reflecting member may have a parabolic reflecting surface that reflects the light forming the focal point in parallel, and the focal point of the reflecting surface may coincide with the focal point of the first reflecting member. In such a case, parallel light is emitted upward or downward from the second reflecting member in the building, so that the inner wall, ceiling, floor, etc. of the building can be illuminated locally, and external light can be effectively used as indirect lighting, for example. . In addition, the interior is improved.

  The second reflecting member reflects light upward, and the lower end of the second reflecting member may be located above the lower end of the opening. In such a case, since a gap is formed between the lower end of the second reflecting member and the lower end of the opening, for example, diffused light irregularly diffused by the first reflecting member is directly taken into the building from the gap. Can do. Thereby, the brightness of the downward side of the opening part of a building is securable, for example.

  The second reflecting member reflects light downward, and the upper end of the second reflecting member may be located below the upper end of the opening. In this case, since a gap is formed between the upper end of the second reflecting member and the upper end of the opening, for example, diffused light of external light can be directly taken into the building from the gap. Thereby, the brightness of the upper side of the opening part of a building is securable, for example.

  The reflective surface of the first reflective member may be continuously connected to the lower end surface of the opening. In such a case, the light reflected by the first reflecting member can be efficiently incident on the building.

  The lower part of the reflective surface of the first reflective member may be located inside the outermost surface of the opening. In such a case, more diffused light of outside light can be put into the building.

  The above daylighting apparatus may further include an auxiliary reflecting member that reflects diffused light that does not directly pass through the opening portion of the light reflected by the first reflecting member and enters the building through the opening portion. Good. In such a case, the daylighting efficiency of outside light can be further increased.

  According to the present invention, even in a place where only the skylight reaches without direct sunlight, it is possible to sufficiently illuminate without widening the opening of the building.

It is a schematic diagram of the building which has a lighting device. It is explanatory drawing which shows the outline of a structure of a daylighting apparatus. It is explanatory drawing which shows an area | region with a focus. It is explanatory drawing of the daylighting apparatus which has a 2nd reflection member which reflects light below. It is explanatory drawing of the lighting device which has an auxiliary | assistant reflection member.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Drawing 1 is an explanatory view showing building 2 provided with lighting device 1 concerning this embodiment. FIG. 2 is an explanatory diagram showing an outline of the configuration of the daylighting apparatus 1. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The daylighting apparatus 1 is suitable for the building 2 narrow between the adjacent building 3, for example. The daylighting apparatus 1 is provided in the opening A of the outer wall B of the building 2 facing the adjacent building 3. A window C is provided in the opening A. As shown in FIG. 2, the daylighting apparatus 1 includes a first reflecting member 10 provided outside the opening A of the building 2 and a second reflecting member 11 provided inside the opening A of the building 2. Have.

  The first reflecting member 10 reflects light incident from above between the buildings, and enters the inside of the building 2 through the window C. The first reflecting member 10 has a parabolic reflecting surface 20 that is convex downward. As a result, the parallel light incident from the top toward the vertically downward direction is reflected by the first reflecting member 10 to form a focal point S and enter the inside of the building 2.

  The lower part of the reflecting surface 20 of the first reflecting member 10 enters inside the outermost surface D of the opening A (the outer surface of the outer wall B). The lower part of the reflecting surface 20 of the first reflecting member 10 does not reflect parallel light directed vertically downward from above, but reflects other diffused light, and part of the diffused light is directed to the inside of the building 2. It can be made incident. Further, the reflecting surface 20 of the first reflecting member 10 is set to the same height as the lower end surface A1 of the opening A, and is continuously connected to the lower end surface A1 of the opening A.

  A position where the first reflecting member 10 is incident vertically downward from above and all parallel light reflected by the reflecting surface 20 outside the outermost surface D of the opening A enters the building 2 through the opening A, It is provided at an angle. The position of the focal point S is, for example, the height between the lower end surface A1 and the upper end surface A2 of the opening A as shown in FIG. 3, and the outermost upper end portion P1 and the innermost lower end portion P2 of the opening A are It is set in a range R above the connecting straight line L1 and below the straight line L2 connecting the outermost lower end P3 and the innermost upper end P4 of the opening A.

  The first reflecting member 10 is supported by a support base 30 provided outside the building 2, for example.

  The second reflecting member 11 reflects light incident from the first reflecting member 10 upward. The second reflecting member 11 has a parabolic reflecting surface 40 that reflects, for example, the light that forms the focal point S in parallel. The focal point of the reflecting surface 40 of the second reflecting member 11 coincides with the focal point S of the first reflecting member 10. Thereby, the light which daylighted can illuminate the inner wall and ceiling surface of the building 2.

  The lower end of the second reflecting member 11 is located above the lower end surface A1 of the opening A. That is, a gap is formed between the lower end of the second reflecting member 11 and the lower end surface A1 of the opening A, and a part of the opening A is exposed when viewed from the inside of the building 2.

  The second reflecting member 11 is supported by, for example, a support base 50 provided inside the building 2.

  Next, the operation of the daylighting apparatus 1 configured as described above will be described. As shown in FIG. 1, when sky light, not direct sunlight, is incident between the narrow building 2 and the building 3, parallel light directed downward in the sky light is reflected on the reflecting surface 20 of the first reflecting member 10. , And forms a focal point S through the opening A to enter the building 2. Further, diffused light other than parallel light is also reflected by the reflecting surface 20 of the first reflecting member 10 and enters the building 2. The light that has passed through the focal point S becomes parallel light on the reflecting surface 40 of the second reflecting member 11 and is reflected upward. With this reflected light, the inner wall and ceiling surface of the building 2 are illuminated. In addition, part of the diffused light reflected by the first reflecting member 10 passes under the second reflecting member 11 and enters the building 2.

  According to the present embodiment, outside light can be collected using the first reflecting member 10 having the parabolic reflecting surface 20, and the light can be incident on the building 2 through the opening A. Even in places where it is necessary to rely on skylight in order to obtain daylight without reaching, sufficient daylighting can be performed without increasing the opening A. Moreover, since light is reflected upward by the 2nd reflection member 11, it is suppressed that the condensed light enters directly into the eyes of the person in the building 2, and can implement | achieve the lighting with high living property.

  Further, the focal point S of the first reflecting member 10 is provided at a position where all light incident on the reflecting surface 20 of the first reflecting member 10 vertically from below is incident into the building 2 through the opening A. It has been. Therefore, even if the building 2 can efficiently take parallel light from above into the building A, and the space between the adjacent building 3 is narrow and only the sky light is mainly incident from above, it is sufficient. Daylighting can be realized.

  The second reflecting member 11 has a parabolic reflecting surface 40 that reflects the light forming the focal point S in parallel, and the focal point of the reflecting surface 40 coincides with the focal point S of the first reflecting member 10. Therefore, parallel light is emitted upward from the second reflecting member 11, and the inner wall, ceiling, floor, and the like of the building 2 are locally illuminated, and external light can be effectively used as indirect illumination, for example. In addition, the interior is improved.

  Since the lower end of the second reflecting member 11 is located above the lower end of the opening A, a gap is formed between the lower end of the second reflecting member 11 and the lower end surface A1 of the opening A. Thereby, for example, diffused light of outside light can be taken into the interior of the building 2 from the gap in the horizontal direction, and for example, the brightness on the lower side of the opening A in the building 2 can be secured.

  Since the reflecting surface 20 of the first reflecting member 10 is continuously connected to the lower end surface A1 of the opening A, the light reflected by the first reflecting member 10 can efficiently enter the building 2. Can do.

  Since the lower part of the reflecting surface 20 of the first reflecting member 10 enters inside the outermost surface D of the opening A, more diffused light of outside light can be put into the building 2.

  In the above embodiment, the second reflecting member 11 reflects light upward, but may reflect light downward. In such a case, for example, as shown in FIG. 4, the upper end of the second reflecting member 11 is located below the upper end surface A <b> 2 of the opening A. The second reflecting member 11 is supported by a support member 60 fixed to the inner wall of the building 2, for example. In such a case, since a gap is formed between the upper end of the second reflecting member 11 and the upper end surface A2 of the opening A, for example, diffused light reflected by the first reflecting member 10 is directly passed into the building 2 from the gap. Can be imported. Thereby, the brightness of the upper side of the opening part A in the building 2 can also be secured, for example.

  In the above embodiment, the daylighting apparatus 1 may include the auxiliary reflecting member 70 as shown in FIG. The auxiliary reflecting member 70 is provided on the outer surface of the outer wall B near the upper end surface A2 of the opening A, for example, above the first reflecting member 10, and the opening of the light reflected by the first reflecting member 10 is opened. The diffused light that does not directly pass through A is reflected and incident on the building 2 through the opening A. In such a case, the daylighting efficiency of outside light can be further increased.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  For example, the installation position and angle of the first reflecting member 10 of the daylighting apparatus 1 are not limited to the above embodiment. For example, the first reflecting member 10 may not enter the outermost surface D of the outer wall B of the building 2 or may be separated from the outer wall B. Further, the height of the reflecting surface 20 of the first reflecting member 10 is not necessarily the same as the lower end surface A1 of the opening A. The reflecting surface 40 of the second reflecting member 11 does not necessarily have a parabolic shape. Further, the auxiliary reflecting member 70 may be provided at another position. Furthermore, the lighting device 1 may be provided in another opening of the building 2.

  INDUSTRIAL APPLICABILITY The present invention is useful for performing sufficient daylighting without expanding the opening of a building even in a place where direct sunlight does not reach and it is necessary to rely on skylight.

DESCRIPTION OF SYMBOLS 1 Daylighting device 2 Building 10 1st reflection member 11 2nd reflection member 20 Reflecting surface 40 Reflecting surface A Opening part B Outer wall C Window S Focus

Claims (8)

A daylighting device for taking in light from outside into the building through an opening provided in the outer wall of the building,
A first reflecting member which is provided outside the opening of the building and reflects light incident from above and enters the building through the opening;
A second reflecting member provided inside the opening of the building and reflecting light incident from the first reflecting member upward or downward;
The first reflecting member has a parabolic reflecting surface on which reflected light forms a focal point.   The focal point of the first reflecting member is provided at a position where all light incident on the reflecting surface of the first reflecting member vertically from above is incident on the building through the opening. The daylighting apparatus according to 1.   The second reflecting member has a parabolic reflecting surface that reflects the light forming the focal point in parallel, and the focal point of the reflecting surface coincides with the focal point of the first reflecting member. The daylighting apparatus according to 1 or 2. The second reflecting member reflects light upward.
The lighting device according to claim 1, wherein a lower end of the second reflecting member is located above a lower end of the opening. The second reflecting member reflects light downward.
The lighting device according to claim 1, wherein an upper end of the second reflecting member is positioned below an upper end of the opening.   The lighting device according to claim 1, wherein the reflection surface of the first reflection member is continuously connected to a lower end surface of the opening.   The lighting device according to any one of claims 1 to 6, wherein a lower part of a reflection surface of the first reflection member enters inside an outermost surface of the opening.   The auxiliary reflection member according to any one of claims 1 to 7, further comprising an auxiliary reflection member that reflects diffused light that does not pass through the opening portion of the light reflected by the first reflection member and enters the building through the opening portion. The daylighting device described.

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