JP2001084816A - Sunbeam lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sunbeam lighting device capable of uniformly distributing light in a wide range in an indoor space while reducing light loss on a light distribution plate of a main body. SOLUTION: This lighting device is provided with a lighting unit main body on an opening in a roof or wall, and parallel light of sunbeam from the lighting unit main body is distributed through a main body light distribution plate 7 and an indoor light distribution plate 8 into an indoor space. In this case, the main body light distribution plate 7 is composed so that parallel light is refracted for a specified angle to be diffused having directivity. Otherwise, the parallel light is reflected forward at a specified angle to be diffused having directivity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for providing a daylighting body in a roof or an opening of a wall, and distributing sunlight from the daylighting body to an indoor space via a main body light distribution plate and an indoor light distribution plate. The present invention relates to a configured solar lighting device.

[0002]

2. Description of the Related Art In general, for example, a skylight is known as a sunlight collecting device for taking sunlight into an indoor space. However, the skylight cannot respond to the movement of the sun that changes depending on the season or time, and when the position of the sun is low, such as in the morning, evening, or winter, it is difficult to capture the sunlight into the indoor space.
Therefore, a solar lighting device capable of capturing sunlight into an indoor space regardless of the position of the sun has been proposed.

FIG. 5 shows a conventional solar lighting device. This solar lighting device 1 is installed in an opening 2 a of a roof 2,
Dome-shaped lighting device main body 3 protruding from the upper surface of this roof 2
Is provided. The lighting device main body 3 includes two lighting prism plates (not shown) in a transparent dome.

A main body light distribution plate 7 is mounted below the light collector main body 3, and an indoor light distribution plate 8 is further mounted below the main body light distribution plate 7.

The sunlight passing through the light collector main body 3 is parallel light, which enters the main body light distribution plate 7 and is diffused by a grain (or a diffusing agent) of the main body light distribution plate 7 to form substantially parallel light. It enters the indoor light distribution plate 8 as it is. The main body light distribution plate 7 acts so that the rainbow-colored sunlight generated by the dispersion by the lighting prism plate is not reflected on the indoor light distribution plate 8.

[0006] The indoor light distribution plate 8 is made of a light transmitting material, and a diffusing agent 11 is mixed therein as shown in Figs.

When the amount of the diffusing agent mixed in the indoor light distribution plate 8 is small, a part of the light incident on the indoor light distribution plate 8 is slightly diffused as shown in FIG. Is transmitted through the indoor light distribution plate 8 and travels vertically downward.
Therefore, as shown in FIG. 5, light that follows a curve that becomes stronger right below is taken in the room. On the other hand, as shown in FIG. 6B, when a large amount of diffusing agent is mixed in the indoor light distribution plate 8,
Most of the light that has entered the indoor light distribution plate 8 is diffused in multiple directions by the diffusing agent, and the amount of light that passes therethrough and travels vertically downward is reduced. Therefore, as shown in FIG. 5, light that follows the curve is taken in the room.

[0008]

In the above-mentioned prior art, when the diffusion rate of the indoor light distribution plate 8 is increased, the illuminance distribution is widened, while the illuminance level in the room is reduced. If the diffusion rate is reduced, the illuminance level in the room increases, but the illuminance distribution in the room narrows.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a solar lighting device capable of distributing light having a high illuminance level uniformly over a wide area of a room. To provide.

[0010]

According to the first aspect of the present invention,
A solar lighting device comprising: a lighting device main body in an opening of a roof or a wall; and a parallel light beam of sunlight from the lighting device body is distributed to an indoor space via a main body light distribution plate and an indoor light distribution plate. Is characterized in that parallel light is refracted by a predetermined angle and dispersed with directivity, or parallel light is reflected forward by a predetermined angle and dispersed with directivity.

According to a second aspect of the present invention, in the first aspect, the main body light distribution plate is formed of a light transmissive material having a plurality of concave portions on an emission surface side, and each of the concave portions has a parallel light. The light is refracted at a predetermined angle by the concave portion and is dispersed with directivity.

According to a third aspect of the present invention, in the light emitting device according to the first aspect, the main body light distribution plate includes a plurality of reflectors inclined forward, and parallel light is reflected by the reflectors at a predetermined angle to increase directivity. It is characterized in that it is configured to be held and dispersed.

According to these inventions, the main light distribution plate refracts the parallel light by a predetermined angle and disperses the parallel light with directivity.
Alternatively, since the parallel light is reflected forward by a predetermined angle and dispersed with directivity, light traveling in many directions is incident on the indoor light distribution plate without being lost by the main body light distribution plate. The incident light travels straight through the indoor light distribution plate while being dispersed in a large number of directions, so that light having a high illuminance level is distributed uniformly over a wide area in the indoor space.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the solar lighting apparatus includes a main body light distribution plate 7 made of a light transmitting material above the opening 2a of the roof 2, and a diffusing agent 11 below the light distribution plate 7 as shown in FIG. It is provided with a mixed indoor light distribution plate 8. The rest of the configuration is substantially the same as the conventional configuration shown in FIG. 5, and a description thereof will be omitted.

The main body light distribution plate 7 is a single plate made of a light-transmitting material, and an incident surface (a main body lighting surface) 7a on which sunlight enters is a flat surface. As shown in FIGS. On the emission surface 7b side from which sunlight is emitted corresponding to the back surface,
A plurality of regular hexagonal pyramidal recesses 6 are formed without gaps.

Above the main body light distribution plate 7, the daylight main body 3 is provided.
(FIG. 5) is installed, and parallel light is incident on the main body light distribution plate 7 from the light collector main body 3.

The parallel light enters the main body light distribution plate 7 and travels straight through the inside thereof, as shown in FIG. 3, and then is refracted by the concave portion 6 at a predetermined angle (for example, 15 °) into a directivity. As shown in FIG. 1, light is distributed almost uniformly over the entire indoor lighting surface 8a of the indoor light distribution plate 8, as shown in FIG. That is, the light incident on the main body light distribution plate 7 is refracted at a predetermined refraction angle by the prism action on the multiple faces of the plurality of hexagonal pyramid-shaped recesses 6 formed on the emission surface 7b side, and travels there. Since light is merely refracted, no diffusion is performed, and no upward reflected light is generated.

As shown in FIG. 3, the light H 1 refracting inside the main body light distribution plate 7 and traveling enters the indoor light distribution plate 8.
The light incident on the indoor light distribution plate 8 has a diffusing agent 1 therein.
1 is diffused. The light after diffusion here has the highest intensity of the light H2 which coincides with the traveling direction of the incident light H1, and the other lights H3 and H4 gradually decrease in intensity as they move away therefrom.

A diffusing agent 11 is mixed in the indoor light distribution plate 8, and a small amount of the diffusing agent 11 is desirable as shown in FIG. 6A. This is because the amount of light reflected by the diffusing agent 11 is reduced, and a decrease in illuminance is suppressed.

With the above configuration, in this embodiment, first, there is almost no diffusion of light in the main body light distribution plate 7 and the light enters the indoor light distribution plate 8 as compared with the conventional one. Light loss is greatly reduced. Secondly, as shown in FIG. 3, the light H1 is incident on the entire area of the daylighting surface 8a of the indoor light distribution plate 8, and the light emitted from the indoor light distribution plate 8 matches the traveling direction of the incident light H1. Focusing on light H2, light H
3. Since the light is diffused like the light H4, at least the intensity of the light H2 is maintained, and the room illuminance can be maintained high.

FIGS. 4a and 4b show another embodiment.

In this embodiment, the main light distribution plate 31 is different from that of the above embodiment. This main body light distribution plate 31
Has two frame-shaped reflectors 32a and 32b, and one reflector 32a is formed smaller than the other reflector 32b. The small reflector 32a is arranged so as to surround the large reflector 32b, and the reflectors 32a, 32b are diagonally downward (obliquely forward) as shown in FIG. 4b.
And are connected by four support members 33.

In this embodiment, of the parallel light incident on the main body light distribution plate 31, the light H5 passing between the respective reflectors 32a and 32b travels straight, and the light H incident on the respective reflectors 32a and 32b.
6 travels obliquely forward after being reflected by each of the reflectors 32a and 32b.

That is, in the main body light distribution plate 31, there is no light reflected at least upward in the figure, and all of the light goes straight there or reflects obliquely forward and travels, and the room located therebelow. The light is incident on the incident surface 9a of the light distribution plate 9.

According to this, firstly, light is hardly diffused in the main body light distribution plate 31 and is incident on the indoor light distribution plate 8 as compared with the conventional one, so that light loss in the main body light distribution plate 31 is large. To be reduced. Second, the indoor light distribution plate 8 has a structure shown in FIG.
As shown in the figure, the light H1 is incident on the entire area of the daylighting surface 8a, and the light emitted from the indoor light distribution plate 8 is, like the light H3 and the light H4, centered on the light H2 that matches the traveling direction of the incident light H1. Therefore, at least the intensity of the light H2 is maintained, and the room illuminance can be maintained high.

Although the present invention has been described based on one embodiment, the present invention is not limited to this. In the two embodiments described above, the main body light distribution plate 7 or 31 is provided in the sunlight collecting device 1, but the same effect can be obtained by providing the main body light distribution plate 7 or 31 in a skylight, for example.

Although the concave portion 8 is formed in a hexagonal pyramid shape, it may be formed in other polygonal pyramid shapes or conical shapes.

[0029]

According to the present invention, the main light distribution plate is refracted by a predetermined angle for parallel light and dispersed with directivity, or the parallel light is reflected forward by a predetermined angle and dispersed with directivity. With such a configuration, light traveling in multiple directions is incident on the indoor light distribution plate, whereby light can be uniformly distributed over a wide range in the indoor space.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a solar lighting device.

2A is a plan view of a main body light distribution plate, FIG. 2B is a diagram of a concave portion, and FIG.

FIG. 3 is a diagram illustrating the progress of light.

FIG. 4A is a plan view of a main body light distribution plate, and FIG.

FIG. 5 is a view for explaining the principle of a solar lighting device.

6A and 6B are diagrams showing an indoor light distribution plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sunlight lighting device 3 Daylighting device main body 6 Depression 7 Main body light distribution plate 9 Indoor light distribution plate 32a, 32b Reflection plate

Claims (3)

[Claims] 1. A solar light collecting device comprising: a lighting device main body provided on an opening of a roof or a wall; and parallel light of sunlight from the lighting device main body is distributed to an indoor space via a main body light distribution plate and an indoor light distribution plate. The main body light distribution plate is configured so that parallel light is refracted at a predetermined angle and dispersed with directivity, or parallel light is reflected forward at a predetermined angle and dispersed with directivity. Solar lighting equipment. 2. The light distribution plate of the main body is formed of a light transmissive material having a plurality of recesses on an emission surface side, and the parallel light collected in each of the recesses is refracted at a predetermined angle by the recesses to have directivity. The sunlight collecting device according to claim 1, wherein the device is configured to be dispersed. 3. The apparatus according to claim 1, wherein the main body light distribution plate includes a plurality of reflectors inclined forward, and the parallel light is reflected at a predetermined angle by the reflectors to be dispersed with directivity. Item 2. The solar lighting device according to Item 1.