JP2012230841A - Light shelf structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light shelf structure capable of preventing a visual field of a resident from blocking and irradiating a desired irradiation area of a ceiling surface with a desired amount of light.SOLUTION: The light shelf structure includes a daylighting window 12 arranged on an outer wall, and a light shelf arranged on the outer wall. The light shelf introduces sunlight to the indoor through the daylighting window by reflecting the sunlight at a reflection region 20, and irradiates the desired irradiation area 30 of the ceiling surface 15 in the indoor. An angle of an indoor side end edge 20A of the reflection region 20 is determined so as to make the sunlight reach to the indoor side end edge 30A of the irradiation area 30 by reflecting the sunlight at the indoor side end edge 20A, and the angle of an outdoor side end edge 20B of the reflection region 20 is determined so as to make the sunlight reach to the outdoor side end edge 30B of the irradiation area 30 by reflecting the sunlight at the outdoor side end edge 20B.

Description

  The present invention relates to a light shelf structure. More specifically, the present invention relates to a light shelf structure that reflects sunlight in a rectangular reflection region and irradiates a rectangular irradiation region on an indoor ceiling surface.

Conventionally, in order to introduce sunlight into a room, a light shelf and a blind are known.
The light shelf, for example, protrudes horizontally from the outer wall, reflects sunlight with a substantially horizontal reflecting surface, introduces it into the room through a lighting window, and irradiates the indoor ceiling surface (see Patent Document 1).
The blind is composed of, for example, a plurality of horizontally extending slats arranged vertically, and reflects sunlight to each slat to irradiate the indoor ceiling surface. The angle of each slat is controlled based on the solar altitude. Specifically, the upper slat irradiates the back of the room and the lower slat irradiates the window side (Patent Document). 2).

JP 2010-186695 A JP 11-195306 A

  However, in the light shelf shown in Patent Document 1, since the reflecting surface is substantially horizontal, it may be difficult to irradiate sunlight on a desired position on the ceiling surface throughout the year.

Moreover, in the blind shown by patent document 2, since the slats are approaching, the light reflected on the slats is blocked by the upper slats, and the amount of light irradiated on the ceiling surface is reduced.
It is necessary to increase the reflectivity of the slats in order to secure the amount of light irradiated to the ceiling surface, but since the residents feel glare, the reflectivity of the slats cannot be increased and the ceiling surface The amount of light irradiated cannot be increased.
In addition, since the blind covers the window, there is a problem that the occupant's field of view is largely blocked.

  It is an object of the present invention to provide a light shelf structure that can prevent a resident's view from being obstructed and can irradiate a desired irradiation area of a ceiling surface with a desired light amount.

  The light shelf structure according to claim 1, comprising: a daylighting window provided on an outer wall; and a light shelf provided on the outer wall, wherein the light shelf reflects sunlight in a reflection region to reflect the daylighting window. A light shelf structure that illuminates a desired irradiation area of the ceiling surface of the indoor through the lighting window side edge of the reflection area as an indoor edge and the outdoor edge as a roof. The outer edge, the indoor edge of the desired irradiation area of the ceiling surface is the indoor edge, the lighting window edge is the outdoor edge, and the angle of the indoor edge of the reflection area Is determined such that the sunlight is reflected at the indoor side edge and reaches the indoor side edge of the irradiation area, and the angle of the outdoor side edge of the reflection area is determined by the sunlight being the outdoor side edge. And is determined so as to reach the outdoor edge of the irradiation area. And wherein the Rukoto.

According to the present invention, the angle of the indoor side edge of the reflection area is determined so that sunlight is reflected by the indoor side edge and reaches the indoor side edge of the desired irradiation area. Further, the angle of the outdoor side edge of the reflection region is determined so that the sunlight is reflected by the outdoor side edge and reaches the outdoor side edge of the desired irradiation region.
Thereby, the light reflected in the reflection area is irradiated to a desired irradiation area on the ceiling surface. Therefore, by adjusting the area of the reflection region, a desired irradiation region on the ceiling surface can be irradiated with a desired light amount. Moreover, it can prevent that a resident's view is obstructed by installing a light shelf in a resident's height level.

  The light shelf structure according to claim 2 is characterized in that a cross-sectional shape of the reflection region is an arc shape extending from the indoor side edge to the outdoor side edge.

  According to this invention, since the cross-sectional shape of the reflection region is an arc shape extending from the indoor side edge to the outdoor side edge, it is possible to diffuse the sunlight collected in a wider range.

  The light shelf structure according to claim 3, wherein a second irradiation area having a rectangular shape with high illuminance is provided in a desired part of the irradiation area, and the second irradiation area is irradiated to a part of the reflection area. A reflection area is provided, an edge on the daylighting window side of the second reflection area is a second indoor side edge, an edge on the outdoor side is a second outdoor side edge, and an indoor end of the second irradiation area An edge is a second indoor side edge, an edge on the daylighting window side is a second outdoor side edge, and the angle of the second indoor side edge of the second reflection region is that sunlight is the second indoor side edge. It is determined to reflect at the edge and reach the second indoor side edge of the second irradiation area, and the angle of the second outdoor side edge of the second reflection area is that the sunlight is the second outdoor side edge. It is determined so as to be reflected at the edge and reach the second outdoor side edge of the second irradiation region.

According to the present invention, a desired part of the irradiation area is a rectangular second irradiation area with high illuminance, and a part of the reflection area is a second reflection area that irradiates the second irradiation area. Further, the angle of the second indoor side edge of the second reflection region is determined so that sunlight is reflected by the second indoor side edge and reaches the second indoor side edge of the second irradiation region, The angle of the second outdoor side edge of the second reflection region is determined so that sunlight is reflected by the second outdoor side edge and reaches the second outdoor side edge of the second irradiation region.
Thereby, the light reflected in the second reflection area is irradiated to a desired second irradiation area on the ceiling surface. Therefore, by adjusting the area of the second reflection region, the desired partial illuminance on the ceiling surface can be particularly increased.

  The light shelf structure according to claim 4 is characterized in that a cross-sectional shape of the second reflection region is a straight line extending from the second indoor side edge to the second outdoor side edge.

  According to the present invention, since the cross-sectional shape of the second reflection region is a straight line extending from the second indoor side edge to the second outdoor side edge, it irradiates the sunlight collected in the same range as the second reflection region. it can.

  The light shelf structure according to claim 5 sets three types of incident angles of the sunlight according to summer, winter, and intermediate seasons, and determines the shape of the reflection region and the shape of the reflection region according to the set incident angles. An inclination angle is obtained, and the inclination angle of the reflection region is changed for each season.

  According to this invention, three types of incident angles of sunlight are set according to the summer, winter, and intermediate seasons, and the inclination angle of the reflection region is changed for each season. Thereby, the desired irradiation area | region of a ceiling surface can be irradiated with a desired light quantity through a year.

  According to the present invention, the angle of the indoor side edge of the reflection region is determined so that sunlight is reflected by the indoor side edge and reaches the indoor side edge of the desired irradiation region. Further, the angle of the outdoor side edge of the reflection region is determined so that the sunlight is reflected by the outdoor side edge and reaches the outdoor side edge of the desired irradiation region. Thereby, the light reflected in the reflection area is irradiated to a desired irradiation area on the ceiling surface. Therefore, by adjusting the area of the reflection region, a desired irradiation region on the ceiling surface can be irradiated with a desired light amount. Moreover, it can prevent that a resident's view is obstructed by installing a light shelf in a resident's height level.

It is sectional drawing of the light shelf structure which concerns on 1st Embodiment of this invention. It is an expanded sectional view of the light shelf concerning the embodiment. It is a figure for demonstrating the procedure which determines the shape of the reflective area | region in the summer about the light shelf which concerns on the said embodiment. It is a figure for demonstrating the procedure which determines the shape of the reflective area in winter about the light shelf which concerns on the said embodiment. It is FIG. (1) for demonstrating the procedure which determines the shape of the reflective area | region in the summer about the light shelf which concerns on 2nd Embodiment of this invention. It is FIG. (2) for demonstrating the procedure which determines the shape of the reflective area | region in the summer about the light shelf which concerns on the said embodiment. It is an expanded sectional view of the light shelf which concerns on the 1st modification of this invention. It is a figure which shows the shape of the reflective area | region of the light shelf which concerns on the 2nd modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a cross-sectional view of a light shelf structure 1 according to the first embodiment of the present invention.

The light shelf structure 1 includes a daylighting window 12 provided on the outer wall 11 of the building 10 and a light shelf 13 provided on the outer wall 11.
The space on the indoor side of the outer wall 11 is a room 14, and this room 14 has a ceiling surface 15.
The daylighting window 12 is provided from the level of the occupant's waist to the level of the ceiling 15. The light shelf 13 is provided at an intermediate height of the daylighting window 12, specifically at the level of the occupant's height.

  On the upper surface of the light shelf 13, a reflection region 20 made of, for example, aluminum is formed, and sunlight is reflected by the reflection region 20 and introduced into the chamber 14 through the daylighting window 12. Irradiate the irradiation region 30.

FIG. 2 is an enlarged cross-sectional view of the light shelf 13.
The light shelf 13 includes a pair of brackets 131 attached to the window frame 121 of the daylighting window 12 and a light shelf main body 132 provided between the brackets 131.
The upper surface of the light shelf main body 132 is the reflection region 20 described above.

The light shelf main body 132 is movable, and the inclination angle can be changed according to the seasons of summer, winter, and intermediate seasons (spring and autumn).
That is, the end edge of the light shelf main body 132 on the daylighting window 12 side is rotatably supported by the bracket 131, and the end edge on the outdoor side is supported by the bracket 131 so as to be slidable in an arc shape. By adjusting the position of the edge on the outdoor side of the light shelf main body 132, the light shelf main body 132 can be rotated about the edge on the lighting window 12 side as a rotation axis, and the inclination angle can be set.

Specifically, in summer, the edge on the outdoor side of the light shelf main body 132 is set to the position A, and the cross-sectional shape of the reflection region 20 is set to a predetermined shape (arc R ₁ described later).
In the middle season, the edge on the outdoor side of the light shelf main body 132 is set to the position B, and the cross-sectional shape of the reflection region 20 is set to a predetermined shape.
In winter, the edge on the outdoor side of the light shelf main body 132 is set to the position C, and the cross-sectional shape of the reflective region 20 is set to a predetermined shape (an arc R ₂ described later).

  Next, a procedure for determining the shape of the reflection region 20 in summer and winter will be described with reference to FIGS. Note that the shape of the reflection region 20 in the intermediate season can also be obtained by a procedure similar to the procedure for determining the shape of the reflection region 20 in summer and winter.

  Hereinafter, the edge on the daylighting window 12 side of the reflection region 20 is referred to as an indoor edge 20A, and the outdoor edge is referred to as an outdoor edge 20B. Furthermore, the indoor side edge of the desired irradiation region 30 in the ceiling surface 15 is defined as an indoor side edge 30A, and the edge on the lighting window 12 side is defined as an outdoor side edge 30B.

First, a procedure for determining the shape of the reflection region 20 in summer will be described with reference to FIG.
First, the incident angle of sunlight in summer is set. In the present embodiment, the incident angle of sunlight in summer is set to 78 °, which is the south-central altitude of the summer solstice at 35 ° north latitude.

Next, the angle of the indoor side edge 20 </ b> A of the reflection region 20 is determined so that sunlight is reflected by the indoor side edge 20 </ b> A and reaches the indoor side edge 30 </ b> A of the irradiation region 30.
Specifically, a straight line is drawn L ₁ indoor side edge 20A from the indoor side edge 30A, the bisector of the angle formed by the sun S ₁ that is incident on the straight line L ₁ and the indoor side edge 20A Ask. Then, draw a straight line P ₁ perpendicular to the bisector indoor side edge 20A.

Further, the angle of the outdoor side edge 20B of the reflection region 20 is determined so that sunlight is reflected by the outdoor side edge 20B and reaches the outdoor side edge 30B of the irradiation region 30.
Specifically, a straight line is drawn L ₂ outdoor side edge 20B from the outdoor side end edge 30B, the bisector of the angle formed by the sunlight S ₂ incident on the straight line L ₂ and the outdoor side edge 20B Ask. Then, draw a straight line P ₂ perpendicular to the bisector on the weather side edge 20B.

Next, draw an arc _{R 1} extending from the indoor side edge 20A on the outdoor side edge 20B. Here, the straight line P ₁ and the straight line P ₂ are set to be tangent to the arc R ₁ . This arc R ₁ is the cross-sectional shape of the reflection region 20.

Next, a procedure for determining the shape of the reflection region 20 in winter will be described with reference to FIG.
First, the incident angle of sunlight in winter is set. In this embodiment, the incident angle of sunlight in winter is set to 31 °, which is the south-middle altitude of the winter solstice at 35 ° north latitude.

Next, the angle of the indoor side edge 20 </ b> A of the reflection region 20 is determined so that sunlight is reflected by the indoor side edge 20 </ b> A and reaches the indoor side edge 30 </ b> A of the irradiation region 30.
Specifically, a straight line is drawn L ₃ indoor side edge 20A from the indoor side edge 30A, the bisector of the angle formed between the sunlight S ₃ incident on the straight line L ₃ and the indoor-side edge 20A Ask. Then, draw a straight line P ₃ that is perpendicular to the bisector indoor side edge 20A.

Further, the angle of the outdoor side edge 20B of the reflection region 20 is determined so that sunlight is reflected by the outdoor side edge 20B and reaches the outdoor side edge 30B of the irradiation region 30.
Specifically, a straight line is drawn L ₄ on the weather side end edge 20B from the outdoor side end edge 30B, the bisector of the angle between the sunlight S ₄ that is incident to the straight line L ₄ and outdoor side edge 20B Ask. Then, draw a straight line P ₄ orthogonal to the bisector on the weather side edge 20B.

Next, draw an arc _{R 2} extending from the indoor side edge 20A on the weather side edge 20B. Here, straight line _{P 3} and the straight line _{P 4} is made to be tangent to the circular arc _{R 2.} This arc R ₂ is the cross-sectional shape of the reflection region 20.

According to this embodiment, there are the following effects.
(1) The angle of the indoor side edge 20 </ b> A of the reflection region 20 is determined so that sunlight is reflected by the indoor side edge 20 </ b> A and reaches the indoor side edge 30 </ b> A of the desired irradiation region 30. Further, the angle of the outdoor side edge 20B of the reflection region 20 is determined so that sunlight is reflected by the outdoor side edge 20B and reaches the outdoor side edge 30B of the desired irradiation region 30.
As a result, the light reflected in the reflection region 20 is applied to the desired irradiation region 30 of the ceiling surface 15. Therefore, by adjusting the area of the reflection region 20, the desired irradiation region 30 of the ceiling surface 15 can be irradiated with a desired light amount. Moreover, since the light shelf 13 is installed at the height level of the resident, the sight of the resident is not obstructed.

  (2) The sunlight collected by making the cross-sectional shape of the reflection region 20 into an arc shape extending from the indoor side edge 20A to the outdoor side edge 20B can be diffused in a wider range.

  (3) Three types of incident angles of sunlight are set according to the summer, winter, and intermediate seasons, and the inclination angle of the reflection region 20 is changed for each season. Thereby, the desired irradiation area | region 30 of the ceiling surface 15 can be irradiated with a desired light quantity through the year.

The shape of the reflection region 20 of the light shelf 13 is obtained in each of the summer, middle and winter seasons. Here, which shape is selected and installed is determined according to a desired priority.
For example, when it is desired to reliably irradiate a predetermined area of the indoor ceiling surface with daylight in summer, the shape of summer is used. In addition, when it is desired to reliably irradiate a predetermined area of the indoor ceiling surface with daylight in winter, the winter shape is used. In this case, a region narrower than the region irradiated in winter is irradiated in summer.

[Second Embodiment]
In this embodiment, the point which provides the 2nd reflective area | region 40 in a part of reflective area 20 differs from 1st Embodiment.
That is, a second irradiation area 50 having a rectangular shape with high illuminance is provided in a desired part of the irradiation area 30, here, directly above the resident's desk, and the second irradiation area 50 is irradiated to a part of the reflection area 20. Two reflective areas 40 are provided.
A procedure for determining the shape of the reflection region 20 in the present embodiment will be described.

  Here, a procedure for determining the shape of the reflection region 20 in summer will be described with reference to FIG. Note that the shape of the reflective region 20 in the winter and intermediate seasons can also be obtained by the same procedure as the procedure for determining the shape of the reflective region 20 in the summer.

  Hereinafter, the edge on the daylighting window 12 side of the second reflection region 40 is referred to as a second indoor side edge 40A, and the outdoor side edge is referred to as a second outdoor side edge 40B. Further, the indoor side edge of the second irradiation region 50 is defined as a second indoor side edge 50A, and the edge on the lighting window 12 side is defined as a second outdoor side edge 50B.

First, like the first embodiment, obtains the linear _{P 2} of a straight line _{P 1} and outdoor side edge 20B of the indoor-side edge 20A of the reflection region 20 (see FIG. 6).

Next, the sunlight reflects the second indoor side edge 40A of the second reflection region 40 at the second indoor side edge 40A and reaches the second indoor side edge 50A of the second irradiation region 50. To be determined.
Specifically, a straight line is drawn L ₅ to the second indoor side edge 40A from the second indoor-side edge 50A, the angle between the sunlight S ₅ which enters the straight line L ₅ to the second indoor side edge 40A Find the bisector of. Then, draw a straight line P ₅ which is perpendicular to the bisector to the second indoor side edge 40A (see FIG. 6).

Further, the angle of the second outdoor side edge 40B of the second reflection region 40 is set such that sunlight is reflected by the second outdoor side edge 40B and reaches the second outdoor side edge 50B of the second irradiation region 50. To decide.
Specifically, a straight line is drawn L ₆ from the second outdoor-side edge 50B to the second outdoor-side edge 40B, an angle formed by the sunlight S ₆ that enters the straight line L ₆ in the second outdoor-side edge 40B Find the bisector of. Then, draw a straight line P ₆ perpendicular to the bisector to the second outdoor-side edge 40B (see FIG. 6).

Next, the arc R ₃ extending from the indoor side edge 20A to the second indoor side edge 40A of the reflection region 20, the line segment Q ₁ extending from the second indoor side edge 40A to the second outdoor side edge 40B, the second An arc R ₄ extending from the outdoor side edge 40B to the second outdoor side edge 40B is drawn, and this is used as the cross-sectional shape of the second reflection region 40.
Here, the straight line _{P 1} and the straight line _{P 5} is made to be tangent to the circular arc _{R 3.} A straight line _{P 6} and the straight line _{P 2} is set to be the tangent of the circular arc _{R 4.}
The straight line P ₅ and the straight line P ₅ are the same straight line, and the line segment Q ₁ is a line segment on the straight line P ₅ and the straight line P ₅ .

According to this embodiment, there are the following effects.
(4) A desired part of the irradiation region 30 is a rectangular second irradiation region 50 with high illuminance, and a part of the reflection region 20 is a second reflection region 40 that irradiates the second irradiation region 50. Further, the sunlight reflects the angle of the second indoor side edge 40A of the second reflection region 40 at the second indoor side edge 40A and reaches the second indoor side edge 50A of the second irradiation region 50. The angle of the second outdoor side edge 40B of the second reflective region 40 is determined in such a manner that sunlight is reflected by the second outdoor side edge 40B and the second outdoor side edge 50B of the second irradiation region 50 is determined. Decide to reach.
Thereby, the light reflected in the second reflection region 40 is irradiated to the desired second irradiation region 50 of the ceiling surface 15. Therefore, by adjusting the area of the second reflection region 40, the desired partial illuminance of the ceiling surface 15 can be particularly increased.

  (5) Since the cross-sectional shape of the second reflection region 40 is a straight line extending from the second indoor side edge 40A to the second outdoor side edge 40B, the sunlight collected is in the same range as the second reflection region 40. Can be irradiated.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in each of the above-described embodiments, the edge on the lighting window 12 side of the light shelf main body 132 is rotatably supported by the bracket 131, and the edge on the outdoor side is slidably supported by the bracket 131 in an arc shape. Not limited to this. For example, as shown in FIG. 7, the edge on the lighting window 12 side of the light shelf main body 132 is supported by the bracket 131 so as to be slidable up and down, and the edge on the outdoor side is supported by the bracket 131 so as to be slidable horizontally. Also good.

In the second embodiment described above, the shape of the reflective region 20 constituted by an arc _{R 3} and arcs _{R 4,} and the second reflective region 40 constituted by a line segment _{Q 1,} arc _{R 3,} line segment _{Q 1} , and the arc R ₄ were continuous, not limited to this. For example, as shown in FIG. 8, the angle or position of the line segment Q ₁ of the second reflection region 40 may be adjusted according to the position of the second irradiation region 50 to form a step in the reflection region 20.

DESCRIPTION OF SYMBOLS 1 ... Light shelf structure 10 ... Building 11 ... Outer wall 12 ... Daylighting window 13 ... Light shelf 14 ... Room 15 ... Ceiling surface 20 ... Reflection area 20A ... Indoor side edge 20B ... Outdoor side edge 30 ... Irradiation area 30A ... Indoor side Edge 30B ... Outside edge 40 ... Second reflection area 40A ... Second indoor side edge 40B ... Second outdoor side edge 50 ... Second irradiation area 50A ... Second indoor side edge 50B ... Second outdoor side Edge 121 ... Window frame 131 ... Bracket 132 ... Light shelf body A, B, C ... Position L1, L2, L3, L4, L5, L6 ... Straight line P1, P2, P3, P4, P5, P6 ... Straight line Q1 ... Line Minutes R1, R2, R3, R4 ... arc S1, S2, S3, S4, S5, S6 ... sunlight

Claims (5)

A lighting window provided on the outer wall, and a light shelf provided on the outer wall,
The light shelf is a light shelf structure that reflects sunlight in a reflection area and introduces it indoors through the daylighting window, and irradiates a desired irradiation area on the indoor ceiling surface,

The edge on the daylighting window side of the reflective area is the indoor side edge, the outdoor side edge is the outdoor side edge,
The indoor side edge of the desired irradiation area of the ceiling surface is the indoor side edge, the edge on the lighting window side is the outdoor side edge,

The angle of the indoor side edge of the reflection area is determined so that sunlight is reflected by the indoor side edge and reaches the indoor side edge of the irradiation area,
The angle of the outdoor side edge of the reflection region is determined so that sunlight is reflected by the outdoor side edge and reaches the outdoor side edge of the irradiation region.   The light shelf structure according to claim 1, wherein a cross-sectional shape of the reflection region is an arc shape extending from the indoor side edge to the outdoor side edge. A rectangular second irradiation region with high illuminance is provided in a desired part of the irradiation region,
Providing a second reflective region for irradiating the second irradiated region on a part of the reflective region;
The edge on the daylighting window side of the second reflection region is the second indoor side edge, and the outdoor side edge is the second outdoor side edge,
The indoor side edge of the second irradiation area is the second indoor side edge, the lighting window side edge is the second outdoor side edge,
The angle of the second indoor side edge of the second reflective region is determined so that sunlight is reflected by the second indoor side edge and reaches the second indoor side edge of the second irradiation region,
The angle of the second outdoor side edge of the second reflection region is determined so that sunlight is reflected by the second outdoor side edge and reaches the second outdoor side edge of the second irradiation region. The light shelf structure according to claim 1, wherein the light shelf structure is a light shelf structure.   4. The light shelf structure according to claim 3, wherein a cross-sectional shape of the second reflection region is a straight line extending from the second indoor side edge to the second outdoor side edge. Three kinds of incident angles of the sunlight are set according to the summer, winter, and intermediate seasons,
In accordance with the set incident angle, the shape and inclination angle of the reflection region are obtained,
The light shelf structure according to any one of claims 1 to 4, wherein an inclination angle of the reflection region is changed for each season.

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