JPH10269811A - Daylighting apparatus for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a daylighting apparatus which can deliver sufficient natural light to an inner space such as a middle corridor even in a building where daylighting from a roof plane is impossible. SOLUTION: A daylighting apparatus comprises a daylighting opening 5 which is provided on an outer wall 1a of a building 1, an external reflector plate 10 which is provided on an eaves 6 located under the daylighting opening 5 and reflects the light from the sky to the daylighting opening 5, a prism plate 11 which is provided at the daylighting opening 5, refracts both direct light from the sky and the reflected light from the external reflector plate 6 approximately in a horizontal direction, and leads these lights in a garret 3 of the building 1, and an internal reflector plate 15 which reflects the lights guided in the garret 3 by the prism plate 11 downward in the vertical direction to a middle corridor 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a building capable of guiding outdoor natural light indoors with a brightness equivalent thereto when a top light using a roof surface is impossible.

[0002]

2. Description of the Related Art As a method of using outdoor natural light,
Top lights are often used. For example, in the case of a building having a central corridor inside, the central corridor is illuminated by a toplight from a skylight provided on the roof surface. Since the angle of incidence of sunlight is closer to a right angle than a normal window provided on a wall, the top light can obtain several times the brightness of a normal window.

[0003]

By the way, in the case of a building in which a roof window is not provided with a skylight, a top light cannot be adopted. Therefore, in such a case, it is necessary to rely on daylight through ordinary windows. However, in such a case, it is difficult to sufficiently supply natural light to a space in a deep place of the building such as a central corridor.

[0004] In view of the above circumstances, the present invention considers the lighting of a building that allows sufficient natural light to reach a space in a recessed place such as a central corridor even in a building where lighting from the roof is impossible. It is intended to provide a device.

[0005]

According to a first aspect of the present invention, there is provided a lighting opening provided on an outer wall of a building and an eave located below the lighting opening, and light from the sky is provided. An outdoor reflector that reflects the light toward the lighting opening, and is disposed in the lighting opening, and refracts the direct light from the sky and the reflected light from the outdoor reflector in a substantially horizontal direction, thereby providing And a light guiding means for guiding light guided from the prism plate to the space above the ceiling to a place in the building where lighting is required.

A second aspect of the present invention is characterized in that, in the first aspect, a light amount adjusting means is provided between the prism plate and a portion requiring lighting.

A third aspect of the present invention is characterized in that, in the second aspect, an auxiliary artificial lighting device is incorporated in the light amount adjusting means.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the light guided in the horizontal direction from the prism plate as the light guide means is provided vertically below the ceiling as the light guide means. It is characterized by providing an indoor reflector that reflects toward the interior.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a central corridor is provided inside the building as the lighting required portion.

A sixth aspect of the present invention is characterized in that, in the fourth or fifth aspect, a driving mechanism for controlling a light guiding direction by adjusting a posture of the indoor reflector is provided.

According to a seventh aspect of the present invention, in any one of the fourth to sixth aspects, between the prism plate and the indoor reflecting plate, a light guiding state adjustment for adjusting a light guiding state from the prism plate to the indoor reflecting plate. Means are provided.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a part of a building to which the daylighting device of the present embodiment is applied, FIG. 2 is an enlarged view of a main part thereof, and FIG. 3 is a cross-sectional view of a prism glass plate as the main part. FIG. 4 is an external view of the entire building.

As shown in FIG. 4, the building 1 has a roof surface closed by a ceiling wall 2 and is constructed under conditions that no opening is provided in the roof surface (for example, when the roof surface is It is used as ground, expressways, elevated lines, etc.). At the upper part of the outer wall 1a of this building, lighting openings 5 of an appropriate size are provided at appropriate intervals, and an eave 6 is provided below it.

As shown in FIGS. 1 and 2, a horizontal space as an underside of a ceiling (ceiling space) 3 is secured at the uppermost part of the interior of the building 1. Is in communication with A central corridor 8 is provided in the center of the building 1, and an upper space of the central corridor 8 intersects with the ceiling 3. At the intersection 9, an indoor reflection plate 15 made of mirror glass inclined at 45 degrees to the horizontal direction is provided.

The indoor reflector 15 is provided in such a position that horizontal light coming from the lighting opening 5 can be reflected vertically toward the floor of the corridor 8. Since the lighting openings 5 are provided in the outer walls 1a on both sides of the building 1, the indoor reflector 15
Are arranged in a pair in opposite directions. The lower end of the pair of indoor reflectors 15 is connected by a rotating shaft, and
The tilting angle can be finely adjusted mainly by moving the upper end of the structural member by a driving mechanism 16 such as a hydraulic cylinder.

A movable louver (or movable grill) 17 as a light amount adjusting means is provided below the indoor reflector 15.
The amount of light distribution from the indoor reflector 15 to the central corridor 8 can be adjusted by adjusting the degree of opening of this portion. The above movable louver (or movable grill) 1
Numeral 7 is formed by a translucent plate such as a mold glass or an acrylic milky white plate. On both sides (only one side is shown in FIG. 2), an auxiliary artificial lighting fixture 18 such as a fluorescent lamp is attached. In dark weather, the movable louver (or movable grill) 17 is closed and the lighting fixture 18 is turned on with an appropriate illuminance, so that natural light and artificial light are mixed and the illuminance can be secured in a state close to nature. It has become. In addition, by increasing the illuminance of the auxiliary artificial lighting fixture 18, necessary illuminance can be secured at night.

On the other hand, the upper surface (top end) of the eave 6 protruding outside
Is provided with a metal outdoor reflector 10 that reflects light from the sky toward the lighting opening 5. A material that is hardly corroded is used as the outdoor reflector, and dust and dust are naturally washed away by rainwater so that light reflection performance can be maintained for a long time. In the lighting opening 5, a prism glass plate (prism plate) 11 for refracting the direct light from the sky and the reflected light from the outdoor reflection plate 10 in the horizontal direction and guiding the light to the ceiling 3 has a substantially vertical posture. It is arranged in.

As shown in FIG. 3, the prism glass plate 11 has a shape in which a large number of rectangular prisms 13 extending in the horizontal direction are continuously arranged in the vertical direction. It is formed by forming a cut-like groove. Prism surfaces 13A and 13B of the micro prism 13;
13C and 13D are formed to connect the vertices F1 and F2 of the triangle to the outside, and are vertically symmetric. Further, when the incident angle of the outdoor light (direct light and reflected light) is 45 degrees, the light is cut so as to emit the horizontal refraction light directed toward the ceiling 3. The prism glass plate 11 can be substituted with a prism film or a prism plastic plate.

The prism glass plate 1 of the lighting opening 5
Transparent glass (light guide condition adjusting means) on the indoor side more than 1
12 are provided. A flat lens film is attached to the transparent glass 12 so as to converge the light guided from the prism glass plate 11 to the indoor reflector 15 as much as possible and to fine-tune the direction of the emitted light. Also,
The transparent glass 12 itself is also attached so that the inclination and posture can be finely adjusted, and a water-stop sheet (not shown) for preventing the invasion of wind and rain is provided on the movable part.

As another supplementary structure, a catwalk for inspection is provided on the underside of the ceiling 3.
In addition, the prism glass plate 11 and the transparent plate 12 can be opened and closed around appropriate fulcrums for inspection and cleaning of the front and back surfaces thereof.

Next, the operation will be described. Outdoor natural light (mainly daytime sunlight and nighttime moonlight) directly enters the prism glass plate 11 as shown by an arrow, or the outdoor reflection plate 10.
And then enter the prism glass plate 11. Outdoor natural light thus obliquely incident is refracted by the prism glass plate 11, guided to the ceiling 3 as horizontal light, passes through the transparent glass 12, and reaches the indoor reflector 15, where it is vertically downward. Reflected, illuminating the middle corridor 8.
Therefore, the central corridor 8 can be illuminated with natural light from above like a top light.

In particular, the light reflected on the lower side of the prism glass plate 11 can be taken indoors by the outdoor reflection plate 10, so that the area of the opening 5 for lighting can be minimized and the distance between the neighboring ground can be reduced. Even when the amount is very slight, the amount of light distribution can be increased. Building 1
Since the light is taken in from the lighting opening 5 provided in the outer wall 1a, the lighting condition according to the top light can be satisfied even when the roof surface is completely closed.

[0023]

As described above, according to the first aspect of the present invention, the direct light from the sky and the reflected light from the outdoor reflector can be simultaneously introduced as horizontal light into the indoor space. A large amount of natural light can be guided to a place requiring indoor lighting. Therefore, even when lighting from the roof surface is impossible, such as on a highway or a building under an overpass, the light from the lighting opening provided on the outer wall of the building has a brightness equivalent to that of the top light and can be used indoors. It can illuminate recessed places. In addition, by providing a lighting opening on the outer wall of the ground floor, it can be used for lighting in a basement, so that the dry area can be omitted. And by adopting the daylighting device of the present invention, it is possible to feel the state of the sky outside, the flow of time, the state of the weather, the weather, even the season, which is impossible in a normal building relying only on artificial lighting. It is possible, and it can be integrated with the outdoors to become a building that can recognize the space-time sky as in the natural environment. In addition, since it is possible to secure a sufficient amount of light by using an outdoor reflector,
The area of the daylighting opening provided on the outer wall can be made as small as a high window. Therefore, it is possible to reduce the construction cost for providing the lighting device. In addition, when lighting from the roof surface is possible, in addition to the top light on the roof surface,
By providing the daylighting device of the present invention, it is possible to further increase the amount of light distribution to a deeper place indoors.

According to the second aspect of the present invention, since the light amount adjusting means is provided in the middle of the optical path, it is possible to adjust the brightness to an appropriate level when the light is too dazzling. In addition, if an auxiliary artificial lighting device is incorporated in the light amount adjusting means as in the invention of claim 3, if natural light cannot be sufficiently collected, artificial light is added by adding artificial lighting to naturally mix artificial light. Illuminance can be secured in a close state.

According to the fourth aspect of the present invention, the light guided in the horizontal direction from the prism plate is reflected vertically downward by the indoor reflector, so that the indoor space, for example, as in the fifth aspect of the present invention. The central corridor inside a simple building can be illuminated from above in the same way as a top light. At this time, if the posture of the indoor reflector can be controlled as in the invention of claim 6, the light distribution state can be adjusted.

According to the seventh aspect of the present invention, if the state of light guide from the prism plate to the indoor reflector can be adjusted, the daylighting efficiency can be increased while using the indoor reflector having the minimum area. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a partially enlarged view of a prism plate in FIG. 2;

FIG. 4 is an overall perspective view of a building to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 1a Outer wall 3 Ceiling back 5 Lighting opening 6 Eave 10 Outdoor reflector 11 Prism glass plate (prism plate) 12 Transparent glass (Light guide condition adjusting means) 15 Indoor reflector 16 Drive mechanism 17 Movable louver or grill (light quantity) Adjustment means) 18 auxiliary artificial lighting equipment

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G02B 27/00 V (72) Inventor Kenji Suzuki 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Corporation

Claims (7)

[Claims] An outdoor which is provided on a lighting opening provided on an outer wall of a building and an eave located below the lighting opening and reflects light from the sky toward the lighting opening. A reflecting plate, a prism plate disposed at the lighting opening, refracting the direct light from the sky and the reflected light from the outdoor reflecting plate in a substantially horizontal direction, and guiding the light to the back of the building; A lighting device for a building, comprising: light guiding means for guiding light guided to the back to a place in the building that requires lighting. 2. A lighting device for a building according to claim 1, wherein a light amount adjusting means is provided between said prism plate and a place requiring lighting. 3. A lighting device for a building according to claim 2, wherein an auxiliary artificial lighting device is incorporated in said light amount adjusting means. 4. An indoor reflection plate is provided on the back of the ceiling as the light guide means, for reflecting light guided in a horizontal direction from the prism plate toward a vertically lower light-requiring portion. A lighting device for a building according to claim 1, 2 or 3. 5. The building according to claim 1, wherein a central corridor is provided as the light-requiring portion inside the building.
3. The lighting device for a building according to 3 or 4. 6. The lighting device for a building according to claim 4, wherein a driving mechanism for controlling a light guiding direction by adjusting a posture of the indoor reflector is provided. 7. Between the prism plate and the indoor reflector,
7. The lighting device for a building according to claim 4, further comprising a light guiding state adjusting means for adjusting a light guiding state from the prism plate to the indoor reflecting plate.