JP2001090277A - Solar-ray daylighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar-ray daylighting device capable of sufficiently introducing mellow light to an effective space or the like in a room in response to the movement of the sun. SOLUTION: A long-sized prism curtain 21 is installed to a roof light window 11, into which solar rays are let daylight, slidably in approximately parallel, the prism curtain 21 has a plurality of opening covering surfaces having approximately the same width as the opening width of the roof light window 11, and daylighting prisms forward opposed to mutually different solar azimuths are mounted on each opening covering surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sunlight collecting device for collecting sunlight through a window.

[0002]

2. Description of the Related Art In general, a window such as a skylight provided on a roof of a building or a vertical window provided on a wall is composed of, for example, a window frame and a window glass mounted so as to be surrounded by the window frame. .

[0003] This type of window allows natural light including sunlight to enter the room through the window glass.

[0004]

However, in the above-mentioned conventional skylight, since the moving sunlight is taken in as it is, the direction of the sunlight entering the room through the skylight depends on the season and the movement of the sun during the day. ing. Therefore,
Depending on the season or the daytime, there is a problem that the illuminance in the effective space cannot be sufficiently obtained because the guided space is shifted from the effective space (for example, the center of the room) which is the central space of human life. .

[0005] In addition, sunlight that enters the room through the window is strong direct light that directly reaches from the sun. Therefore, when the direct light is applied to a person in the room, glare (glare) or heat caused by the direct light is generated. There is a problem that saga gives people discomfort. Furthermore, in order to prevent strong direct light from being guided into the room, it is necessary to block light using a blind or the like. There is a problem that the room becomes extremely dark when shaded with blinds.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a solar light collecting device capable of sufficiently guiding soft light in a desired direction in response to the movement of the sun. is there.

[0007]

According to the first aspect of the present invention,
A long prism curtain is provided so as to be slidable substantially parallel to and slidably with respect to the window that receives sunlight. The prism curtain has a plurality of opening covering surfaces having a width substantially equal to the opening width of the window. The sunlight collecting device is characterized in that the covering surface is provided with a lighting prism directly facing the different sun orientation.

According to a second aspect of the present invention, there is provided the sunlight collecting apparatus according to the first aspect, wherein the prism curtain is wound up by a roll.

According to a third aspect of the present invention, in the first or second aspect, the window is a skylight provided on a roof, and the prism curtain is housed inside a main body of the skylight. It is a solar lighting device characterized by the following.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a sensor for detecting a sun direction is provided, and a sensor for detecting the sun direction is provided.
The sunlight collecting device is characterized in that the prism curtain is slid so that the corresponding opening covering surface covers the opening of the window.

According to a fifth aspect of the present invention, there is provided the sunlight collecting apparatus according to any one of the first to fourth aspects, wherein the prism curtain has an opening covering surface for shielding light.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the prism curtain has an aperture covering surface on which a lighting prism for totally reflecting light is formed. It is a solar lighting device that does.

According to these inventions, a long prism curtain is provided so as to be slidable substantially in parallel with a window for taking in sunlight, and this prism curtain has a plurality of widths substantially the same as the opening width of the window. Since each of the opening covering surfaces is provided with a lighting prism facing each other in different sun directions, the prism curtain is slid, and an opening covering surface having a lighting prism facing in a certain sun direction is provided. Therefore, it is possible to switch to the aperture covering surface having the lighting prism facing the sun direction different from the lighting prism. Therefore, even if the sun moves and the incident direction of the sun rays changes, by selecting an aperture covering surface having a lighting prism corresponding to the incident direction, the sunlight transmitted through the lighting prism can be shaken in a desired direction. Can be done.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a building such as a house. The building 1 includes a room 3 surrounded by a vertical wall 2, and an effective space 4 which is a central space of human life is formed in the center of the room 3. In addition, a roof 5 is provided above the room 3, and the roof 5 is composed of a south roof 5 a which is inclined diagonally downward toward the south and a north roof 5 b which is diagonally inclined downward toward the north. An opening 6 is formed in 5a as shown in FIG.

A sunlight collecting device 7 attached to the opening 6
Will be described.

A window frame 9 is attached to the opening 6, and two window glasses 10 are fixed so as to be surrounded by the window frame 9 to form a skylight 11. As shown in FIG. 3, a pair of support members 12a and 12b are fixed to each of the pair of side portions of the window frame 9 with an interval therebetween, and a roll 13 is provided between the pair of support members 12a and 12b. Is installed rotatably. That is, one roll shaft 15a is locked in the bearing hole 14a of one support member 12a, the other roll shaft 15b passes through the bearing hole 14b of the other support member 12b, and the other roll shaft 15b is Is formed with a rotating handle 16. By manually rotating the rotating handle 16, a prism curtain 21 described later can be wound around one roll 13. Although only one roll 13 is shown in FIG. 3, a similar roll 13 is attached to the other of the opposing sides of the window frame 9.

As shown in FIG. 4, each roll 13 is provided with a long prism curtain 21 which is slidable substantially parallel to the skylight 11 for collecting sunlight.
As shown in FIGS. 5A to 5E, a plurality of opening covering surfaces 22a to 22e are formed in the prism curtain 21 in a line in the winding direction A, and each opening covering surface 22a is formed.
22e, the widths W1 to W5 in the winding direction A are formed to be substantially the same as the opening width Wa of the skylight (FIG. 2).
(FIG. 2) It is possible to cover the whole. That is, FIG.
As shown in FIG. 3, winding the prism curtain 21 around one of the rolls 13 allows any of the opening covering surfaces 22 a to 22 a to 22.
22e can also be arranged at a position 18 (hereinafter referred to as an opening covering position) 18 that covers the opening 17 of the skylight.

In FIG. 5A, reference numeral 22a denotes a total reflection opening covering surface, and a plurality of V prisms 23a extending in a substantially V-shape that open substantially toward the north are formed on the total reflection opening covering surface 22a. The thickness of each lighting prism 23a is
As shown in FIG. 5 (A ′), the thickness is increased in a substantially north direction (actually, a substantially northeast direction in the west half and a substantially northwest direction in the east half). In addition, the apex angle (the angle formed between the light incident surface 24a and the light exit surface 24b) θ1 of each of the daylighting prisms 23a is the daylighting day, the morning sun, and the daylighting prisms 23b to 2d on the daylight sunset opening covering surfaces 22b to 22d.
It is formed larger than the 3d apex angles θ2 to θ4.
In general, as the apex angle of a prism increases, the angle of deflection (the angle between an incident light beam and an outgoing light beam) increases, and total reflection easily occurs on the light exit surface. Accordingly, when the total reflection opening covering surface 22a is moved to the opening covering position 18, as shown by a solid line arrow in FIG. The strong direct light that is reflected and directly reaches from the sun is not guided to the room 3, but only a part of the light is guided to the room 3. The total reflection opening covering surface 22a is effective when only strong light is guided into the room 3 while avoiding strong light.

In the present embodiment, the daylight, sunrise, and sunset daylight opening cover surfaces 22b to 22d are formed on the prism curtain 21 in order to collect sunlight in accordance with the movement of the sun.

In FIG. 5B, reference numeral 22b denotes a daylight daylight opening covering surface.
b, a lighting prism 23b extending in the east-west direction is formed, and the lighting prism 23b faces substantially in the south direction (sun direction). That is, as shown in FIG. The thickness is formed so as to increase in the substantially south direction. Generally, light that has entered the light incident surface of the prism touches the thicker prism and exits from the light exit surface. Accordingly, during the daytime, as shown in FIG.
The sunlight emitted from the sun in the sky approximately in the south direction touches in the direction in which the thickness of the daylighting prism 23b is thicker on the daylight daylighting opening covering surface 22b, that is, in the substantially southern direction. Then, it is guided to the effective space 4 located vertically below the sunlight collecting device 7.

In FIG. 5 (C), reference numeral 22c denotes an opening covering surface for morning sun light, and a lighting prism 23c extending in the east-west direction is formed on the opening covering surface 22c for morning sun light.
Each lighting prism 23c faces substantially east (sun direction), that is, as shown in FIG. 5 (C '), the thickness of each lighting prism 23c increases toward the east. Have been. Generally, light that has entered the light incident surface of the prism touches the prism with a larger thickness and is emitted from the light exit surface. Therefore, in the morning time zone, as shown in FIG.
If the opening cover surface for morning sun light 22c is moved to the opening covering position 18, the sunlight emitted from the sun in the sky substantially in the east direction will be reflected by the lighting prism 2 on the opening cover surface for morning sun light 22c.
It touches in the direction in which the thickness of 3c is thick, that is, substantially in the east direction, and is guided to the effective space 4 located vertically below the sunlight collecting device 7.

In FIG. 5D, reference numeral 22d denotes a sunset lighting opening covering surface, which is a sunset lighting opening covering surface 22.
d is formed with a lighting prism 23d extending in the east-west direction, and each lighting prism 23d faces substantially in the west direction (sun direction), that is, the thickness of each lighting prism 23d is as shown in FIG. As shown in FIG. 5, the thickness is increased substantially toward the west. In general, the light incident on the light incident surface of the prism touches the thicker prism and is emitted from the light exit surface. Therefore, during the evening time, the sunset lighting opening covering surface 22d is covered with the opening covering position 18d. As shown in FIG. 9, the sunlight from the sun in the sky substantially in the west direction is in a direction in which the thickness of the daylighting prism 23 d is thicker on the sunset daylighting opening covering surface 22 d, that is, substantially as shown in FIG. 9. It touches the west direction and is guided to the effective space 4 located vertically below the sunlight collecting device 7.

5 (E) and 5 (E '), the light shielding opening covering surface 22e is formed of, for example, a black light-impermeable material. Therefore, by moving the light-shielding opening covering surface 22e to the opening covering position 18, as shown in FIG.
In any of the morning, noon, and evening hours during the daytime, the sunlight emitted from the sun in the sky substantially in the east, south, or west is absorbed by the light-shielding opening covering surface 22e. In addition, for example, in order to prevent the interior of the room 3 from being seen from outside of the building 1 at night, the light-shielding opening covering surface 22e may be used.

Next, another embodiment will be described. Below,
The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 11, the prism curtain 2
1 and the roll 13 on which the prism curtain 21 can be wound up may be arranged in the window frame 9. In this case, since the prism curtain 21 and the roll 13 do not protrude toward the indoor 3 side, the prism curtain 21 and the roll 13
Are not in the way, and the aesthetic appearance of the sunlight collecting device 7 is improved.

As shown in FIGS. 12 and 13, in the sunlight collecting device 7, an optical sensor 31 for detecting the sun direction,
A microcomputer 32 and a motor 33 for rotating each roll 13 may be provided to automatically slide the prism curtain 21 according to the sun direction detected by the optical sensor 31. That is, the microcomputer 32 selects one of the appropriate opening covering surfaces 22a to 22e according to sunlight information such as the sun direction detected by the optical sensor 31 and a program stored in advance, and selects the selected opening The motor 33 is rotated so that one of the covering surfaces 22 a to 22 e is arranged at the opening covering position 18, and the prism curtain 21 is wound around one roll 13. Thereby, the opening covering surface 2 is changed according to the change of the time zone.
The work of switching between 2a to 22e becomes unnecessary.

FIG. 14 shows that the solar lighting device 7 can be applied not to the skylight 11 but to the vertical window 34. In the figure, the vertical window 34 faces south, and the daylight daylight opening covering surface 35 is located at the opening covering position. When the sunlight collecting device 7 is applied to a vertical window, the daylight, the morning sun, and the sun setting prism for the opening covering surface for sunset light are thicker, for example, substantially vertically upward, substantially east diagonally upward, and substantially west diagonally upward. It is good to guide sunlight toward the ceiling surface 36 of the room 3 for example. In this case, since the sunlight guided to the ceiling surface of the room 3b is irregularly reflected on the ceiling surface, the entire room 3b can be illuminated.

Although not shown, the opening covering surface 22 is not shown.
The light collecting prisms 23a to 23d a to 22d may be formed by changing the apex angles in a stepwise manner. For example, if the vertex angle of the daylighting prism 23b of the daylight daylighting opening covering surface 22b is changed stepwise from the south side to 50, 40, and 30 degrees, the more the daylighting prism is located in the southern direction, the more the sunbeam shakes. Is larger, the sunlight emitted from the daylighting prism 23b can be diffused. For example, if the daylighting prism 23b on the daylight daylight opening covering surface is stepwise changed from the south side to, for example, an apex angle of 30, 40, or 50 degrees, the daylighting prism closer to the southern direction is more likely to have a sunbeam deflection. Since the angle becomes smaller, it is possible to collect sunlight rays emitted from the daylighting prism.

Although not shown, the opening covering position 1
For example, an indoor light distribution plate into which a diffusing agent is mixed may be provided on the light emitting surface side of the light emitting device 8, or a light emitting surface 23 of the daylighting prisms 23a to 23d may be formed with a grain. In this case, the sunlight is diffused by the indoor light distribution plate or the grain, and soft light can be guided to the room 3b.

Although not shown, the opening covering surface 22 is not shown.
The prism curtain 21 may be formed by mixing an ultraviolet absorber into the materials a to 22d. In this case, the ultraviolet light contained in the light emitted from the opening covering surfaces 22a to 22d can be reduced by the ultraviolet absorbent.

In the above-described embodiment, a specific azimuth is indicated as the sun azimuth (for example, approximately the south direction as the daylighting azimuth), but these are based on the sun position in Japan. .

According to the above-described embodiment, the elongated prism curtain 21 is provided so as to be slidable substantially in parallel with the window for taking in sunlight, and the prism curtain 21 has a width substantially equal to the opening width of the window. Openings covering surface 22a having
To 22e, of which the opening covering surfaces 22b to 22d are provided.
Has daylighting, sunrise, and daylighting prisms 23b to 23d facing the sun direction of the sunset, respectively.
(Morning, evening), if the prism curtain 21 is slid and any of the opening covering surfaces 22b to 22d is moved to the opening covering position 18, the sun moves and the incident direction of the sunlight to the window changes. However, the sunlight covers the opening covering surfaces 22b-2.
2d, touch the sun, and direct sunlight to a predetermined direction in the room 3b,
That is, it can be guided to the effective space 4 or the ceiling surface 36 of the room 3. Thereby, the illuminance of the effective space 4 and the like in the room 3 can be increased.

Further, the sunlight collecting device 7 according to the above-described embodiment has a structure in which the prism curtain 21 which can be wound up by the roll 13 is simply attached to a conventional skylight or vertical window. Since it can be retrofitted and has a simple structure, low cost, downsizing, no maintenance, etc. can be realized.

Although the present invention has been described based on the embodiments, the present invention is not limited to these embodiments. In the above-described embodiment, the prism curtain 21 is configured to be wound by the roll 13. For example, a flat prism curtain having a plurality of types of opening covering surfaces is arranged along the wall surface of the window. It is possible to switch the opening covering surface at the opening covering position by sliding the.
Further, in the above-described embodiment, in order to cope with the movement of the sun, the prism curtain 21 is formed with three types of daytime, morning sun, and sunset lighting opening covering surfaces 22b to 22d, but the present invention is not limited to this. For example, for example, an opening covering surface for collecting sunlight in the morning (the thickness of the lighting prism is configured to be thicker substantially in the southeast direction, for example) and an opening covering surface for collecting sunlight in the afternoon (thickness of the lighting prism) For example, the thickness is increased substantially in the southwest direction).

[0036]

According to the present invention, a long prism curtain is provided so as to be slidable substantially in parallel with a window for taking in sunlight, and this prism curtain has a width substantially equal to the opening width of the window. Since a plurality of aperture covering surfaces are provided, and each of the opening covering surfaces is provided with a daylighting prism facing the mutually different sun direction, the prism curtain is slid,
It is possible to switch from an aperture covering surface having a lighting prism facing a certain sun direction to an opening covering surface having a lighting prism facing the sun direction different from the lighting prism. Therefore, even if the sun moves and the incident direction of the sun rays changes, by selecting an aperture covering surface having a lighting prism corresponding to the incident direction, the sunlight transmitted through the lighting prism can be shaken in a desired direction. Can be done.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a building in which a solar lighting device according to an embodiment is mounted on a skylight.

FIG. 2 is an enlarged view showing the solar lighting device of FIG.

FIG. 3 is an enlarged view showing the roll of FIG. 2;

FIG. 4 is a diagram showing a roll shaft and a rotation handle.

5 (A) to 5 (E) are plan views each showing an opening covering surface for total reflection, daylight lighting, morning sun lighting, sunset lighting, and light shielding, and FIG. 5 (A ′) is a cross-sectional view taken along II. , (B ') is II-II
Sectional view, (C ') is a III-III sectional view, (D') is an IV-IV
Sectional drawing, (E ') is a VV sectional view.

FIG. 6 is a diagram showing a path of sunlight when a total reflection opening covering surface is used.

FIG. 7 is a diagram showing a course of sunlight when a daylighting daylight covering surface is used.

FIG. 8 is a diagram showing a course of sunlight when an opening covering surface for morning light is used.

FIG. 9 is a diagram showing a course of sunlight when a sunset lighting opening covering surface is used.

FIG. 10 is a diagram showing the course of sunlight when a light-shielding opening covering surface is used.

FIG. 11 is a view showing a solar lighting device when placed in a window frame as another embodiment.

FIG. 12 is a diagram illustrating a solar lighting device in which the feeding and winding of a long prism curtain are automated as another embodiment.

FIG. 13 is a configuration diagram showing the control system of FIG.

FIG. 14 is a diagram showing a solar lighting device applied to a vertical window as another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 4 Effective space 7 Sunlighting device 13 Roll 21 Prism curtain 22a Total reflection opening covering surface 22b Daytime lighting opening covering surface 22c Asahi daylight opening covering surface 22d Sunset lighting opening covering surface 22e Light shielding opening covering surface 23a ~ 23d Lighting prism 31 Optical sensor

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02B 7/182 F21W 131: 30 27/00 G02B 7/18 D // F21W 131: 30 27/00 U

Claims (6)

[Claims] An elongated prism curtain is provided so as to be slidable substantially parallel to and slidably with respect to a window for taking in sunlight. The prism curtain has a plurality of opening covering surfaces having a width substantially equal to the opening width of the window. A daylighting device comprising: a daylighting prism provided on each of the opening covering surfaces so as to face the different sun directions. 2. The sunlight collecting device according to claim 1, wherein said prism curtain is wound up by a roll. 3. The sunlight collecting device according to claim 1, wherein the window is a skylight provided on a roof, and the prism curtain is housed inside a main body of the skylight. 4. A configuration in which a sensor for detecting the sun direction is provided, and the prism curtain is slid according to the sun direction detected by the sensor so that the corresponding opening covering surface covers the opening of the window. The sunlight collecting device according to any one of claims 1 to 3, wherein: 5. The sunlight collecting device according to claim 1, wherein the prism curtain has an opening covering surface for shielding light. 6. The sunlight collecting device according to claim 1, wherein the prism curtain has an opening covering surface on which a plurality of lighting prisms for totally reflecting light are formed.