JP3598435B2 - Double eaves system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a double eaves system that is installed outside a building opening (particularly, a window).
[0002]
[Prior art]
Sunlight enters the building (room) from windows provided on the east, south, and west sides of buildings that are not adjacent, such as trees and buildings that block sunlight. In this case, for example, if a desk is arranged near the window in the room, the desk is irradiated with sunlight, thereby deteriorating the visual environment. Conventionally, an eave is provided at the upper end of the window to prevent such sunlight from entering. Since the eaves protrude substantially horizontally from the outer wall at the upper end of the opening, the area where sunlight enters the room can be retracted toward the window, and the viewing environment near the window can be improved. Also, the entrance of sunlight can be prevented by a curtain or the like covering the indoor side surface of the window. In particular, according to a light-shielding curtain that has become widespread in recent years, the visible light region of sunlight can be largely shielded as compared with the related art, and deterioration of the visual environment due to direct irradiation of sunlight can be prevented. .
[0003]
[Problems to be solved by the invention]
However, in the case of the conventional eaves, in order to retreat the entrance area of sunlight into the room to the window side while securing the vertical opening height of the window portion, the projection size of the eaves must be increased. However, there is a problem that high strength is required, the structure becomes large, and the architectural design is damaged. In addition, when the curtain is closed to block the entrance of sunlight, the swing of the curtain due to the wind hinders the closing of the window. This makes the room hot and requires air conditioning. That is, there is a disadvantage that air conditioning must be performed even in a season in which window opening ventilation is possible. Further, in this case, since the illuminance of the window portion is reduced by closing the curtain at the same time, the indoor lighting must be turned on, which causes a double disadvantage.
The present invention has been made in view of the above circumstances, and while preventing the entrance of sunlight while securing the vertical opening height of a window, improves the visual environment in a building, and improves the air conditioning load due to radiation. It is an object of the present invention to provide a double eaves system that can suppress the increase in the number of sunlight and can effectively utilize sunlight and that does not impair the architectural design.
[0004]
[Means for Solving the Problems]
The double eaves system according to the present invention for achieving the above object has a horizontal eaves arranged in upper and lower stages at an upper end of an opening outside a window portion of a building, and passes directly through the window portion into the building. A double eaves system that blocks sunlight that is about to enter into the eaves, and that reflects sunlight applied to the upper surface of the eaves through the window and reflects off the ceiling in the building, A first eave provided at an upper end of the opening of the window; and a second eave provided at a distance below the first eave, wherein the first eave is provided at an upper end of the opening. While blocking sunlight trying to directly enter the building from the gap between the part and the second eaves, the second eaves block sunlight trying to directly enter the building, and It is characterized in that sunlight irradiated on the upper surface is reflected on the ceiling surface.
[0005]
In this double eaves system, the first eaves and the second eaves are provided to prevent the direct entry of sunlight into the building while securing the vertical opening height of the window, There is no sunlight irradiation on the desk, and the visual environment inside the building is improved. At the same time, an increase in the air conditioning load due to radiation is suppressed. In addition, the sunlight is reflected on the ceiling surface and used for indirect lighting, so that lighting of the lighting equipment becomes unnecessary, and the lighting energy can be reduced. Furthermore, by providing the first eave and the second eave on the upper and lower sides, the protruding dimension of the eave can be suppressed to be smaller than when one eave having a larger protruding dimension is used, and the same light shielding property is obtained. And the architectural design is not damaged.
[0006]
The double eaves system according to claim 2, wherein a projection dimension of the first eave in a direction perpendicular to the outer wall is D, and a projection dimension of the second eave in a direction perpendicular to the outer wall is D to It is characterized by being formed with 1.5D.
[0007]
In this double eaves system, the projection of the second eave is formed to be 1 to 1.5 times as large as the projection of the first eave, and the sun is placed on the desk surface 500 to 600 mm away from the window. A light-free viewing environment is realized with a minimum projection length of the second eave. Further, there is no useless portion that does not contribute to the reflection of the second eaves, and the second eaves are formed with a minimum protruding length for obtaining a predetermined reflection efficiency.
[0008]
The double eaves system according to claim 3, wherein a protrusion dimension of the first eaves in a direction perpendicular to the outer wall is D, and a gap between the first eaves and the second eaves is D to It is characterized by being set at 1.5D.
[0009]
In this double eaves system, the gap between the first eave and the second eave is set to be 1 to 1.5 times the protruding dimension of the first eave, and the first eave is larger than the protruding dimension of the first eave. The gap between the first eave and the second eave is optimal for light shielding and reflection. Thereby, between 10 am and 2 pm, which is a time zone with strong sunlight, the penetration of sunlight from between the two eaves is efficiently prevented, and the sunlight reflected on the second eave is efficiently emitted. It will be taken into the building. In addition, if this gap is too wide outside the above range, sunlight enters, and if it is too narrow, while having a predetermined projection size, sufficient light shielding is not exhibited, and The amount of reflected light taken in decreases.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a double eaves system according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a window portion to which a double eaves system according to the present invention is attached. A horizontal first eave 7 and a second eave 9 are vertically arranged outside the window 5 formed on the outer wall 3 of the building 1. The first eave 7 and the second eave 9 are formed in a rectangular shape that is long in the frontage direction of the window 5. The first eave 7 and the second eave 9 are provided, for example, on the outer wall 3 with a pair of brackets (not shown) projecting vertically from the outer wall 3 with the window portion 5 interposed therebetween. It can be attached to support the left and right ends.
[0011]
The first eave 7 and the second eave 9 can have a structure in which a frame portion is formed of a lightweight metal such as aluminum or duralumin, and a top plate is attached to the upper surface. Further, a structure may be adopted in which reinforcing ribs or the like are provided on a metal plate or a synthetic resin plate made of the above-described metal, and the plate material alone is supported on the bracket.
[0012]
Note that a plurality of small holes or a plurality of slits that allow sunlight to pass therethrough may be formed on the top plate or the plate material so as not to deteriorate the viewing environment. By providing such small holes or slits, it is possible to appropriately lighten the lower surface of the eaves while shielding sunlight, and to alleviate the feeling of pressure on the lower surface of the eaves caused by darkening. Further, by providing the small holes or slits, the wind pressure resistance can be reduced. As a means for appropriately brightening the lower surface of the eaves, a top plate or a plate material made of a material (such as a resin material) that allows sunlight to pass through appropriately may be used in addition to the small holes and slits.
[0013]
The first eaves 7 are provided at the upper end of the opening of the window 5. For the first eaves 7, a top plate or a plate material is selected from a material that blocks sunlight irradiated on the upper surface. In the case of the first eaves 7, the top plate or the plate member need only block the sunlight, and does not have to have a function of reflecting the irradiated sunlight. The first eave 7 according to this embodiment has a protrusion D in a direction perpendicular to the outer wall 3.
[0014]
The second eave 9 is provided below the first eave 7 with a gap 15 therebetween. For the second eaves 9, a top plate or a plate material is selected from a material having a function of blocking sunlight radiated on the upper surface and reflecting the radiated sunlight. Specifically, a high reflectance can be obtained by attaching a mirror plate or the like to the upper surface of the second eave 9 or by mirror-finishing the aluminum surface. The second eave 9 has a projection in a direction perpendicular to the outer wall 3 that is 1 to 1.5 times the projection of the first eave 7, that is, D to 1.5D. The gap 15 between the first eave 7 and the second eave 9 is set to 1 to 1.5 times the projecting dimension of the first eave 7, that is, D to 1.5D. Further, the second eave 9 is arranged at a predetermined height H from the floor of the room having the window 5. The height H is preferably, for example, in the range of 1800 to 2200 mm. By arranging the second eaves 9 at the height H, the line of sight when viewing the outside through the window 5 is not hindered. In this case, the ceiling height is preferably about 3000 mm.
[0015]
The correlation between the protruding dimension of the first eave 7 and the second eave 9 and the correlation between the protruding dimension of the first eave 7 and the gap 15 will be apparent from the operation described later. It is an important factor that affects the sunlight shielding performance and reflection performance.
[0016]
Next, the operation of the double eaves system 21 configured as described above will be described. FIG. 2 is an explanatory view showing a solar entry area into the building when the projecting size of the first and second eaves is 420 mm, and FIG. 3 is a diagram showing the projecting size of the first eaves is 420 mm. It is explanatory drawing which showed the sunlight penetration area | region into a building when the protrusion dimension of a second eave is 600 mm. In both figures, the scale of the vertical axis Y is shown at a scale approximately twice the scale of the horizontal axis X.
[0017]
In the double eaves system 21, sunlight that is going to enter the building 1 directly through the window 5 is blocked by the first eaves 7 and the second eaves 9, and The sunlight radiated on the upper surface of 9 passes through the window 5 and is reflected on the ceiling surface 23 in the building 1, and is used as indirect lighting.
[0018]
At this time, the first eaves 7 block sunlight trying to directly enter the building from the gap between the upper end of the window 5 and the second eaves 9. In addition, the second eaves 9 block sunlight that is going to enter the building directly from below the first eaves 7 and reflect the sunlight irradiated on the upper surface to the ceiling surface 23.
[0019]
That is, the provision of the first eaves 7 and the second eaves 9 greatly prevents the sunlight from directly entering the building 1 while ensuring the vertical opening height of the window 5. Thus, the desk top surface 25 is not irradiated with sunlight, and the visual environment inside the building 1 is improved. At the same time, an increase in the air conditioning load due to radiation is suppressed. In this case, the desk upper surface 25 is set at 720 mm from the floor.
[0020]
In addition, since the sunlight is reflected on the ceiling surface 23 and used as indirect lighting, it is not necessary to turn on the lighting fixture, and the lighting energy is reduced. Further, since the first eave 7 and the second eave 9 are provided on the upper and lower sides, the protruding dimension of the eaves is suppressed to be smaller than when one eave having a large protruding dimension is used. Is obtained. This keeps the architectural design intact.
[0021]
The projection size of the second eave 9 is 1 to 1.5 times larger than the projection size of the first eave 7, so that the desk surface 25 that is 500 to 600 mm away from the window 5. The viewing environment in which the second eave 9 is not exposed to sunlight is realized with the minimum projection length of the second eave 9. For example, as shown in FIG. 2, when the protrusion dimensions of the first eave 7 and the second eave 9 are the same, between 10 am and 2 pm, which is a time zone where sunlight is strong. In addition, a surface 25a that is not irradiated with sunlight can be secured on the desk upper surface 25. Further, as shown in FIG. 3, when the projecting dimension of the second eave 9 is approximately 1.4 times (600 mm) the projecting dimension (420 mm) of the first eave 7, in a time zone where sunlight is strong. Between a certain morning and 2:00 pm, it is possible to secure the surface 25b to which the sunlight is hardly irradiated on the desk top surface 25.
[0022]
In addition, by providing such a correlation of the protrusion dimensions between the first eaves 7 and the second eaves 9, there is no useless portion that does not contribute to the reflection of the second eaves 9. The second eaves 9 are formed with the minimum protruding length for obtaining the reflection efficiency.
[0023]
Furthermore, in this double eaves system 21, the gap 15 between the first eaves 7 and the second eaves 9 is set to be 1 to 1.5 times the projecting dimension of the first eaves 7, The gap 15 between the first eave 7 and the second eave 9 is optimal for light shielding and reflection. This effectively prevents sunlight from entering between the two eaves between 10 am and 2 pm, which is a time period when the sun is strong, and the sunlight reflected on the second eave 9 is efficiently used. It is often taken into the building 1.
[0024]
【The invention's effect】
As described in detail above, in the double eaves system according to claim 1 of the present invention, the first eaves are provided at the upper end of the opening of the window, and the first eaves are provided with a gap below the first eaves. The provision of two eaves prevents the direct entry of sunlight into the building while securing the vertical opening height of the window, thereby improving the visual environment inside the building and radiating radiation. Therefore, it is possible to suppress an increase in the air conditioning load. Also, since sunlight can be reflected on the ceiling surface and used as indirect lighting, energy saving of lighting energy can be achieved. Furthermore, since the first eave and the second eave are provided on the upper and lower sides, the projection size of the eave can be kept small and the sunlight can be shielded, and the architectural design is not spoiled.
[0025]
The double eaves system according to claim 2, wherein the first eaves have a protrusion dimension of D, and the second eaves have a protrusion dimension of D to 1.5D. A visual environment that does not affect the upper surface can be realized with the minimum projection length of the second eave. In addition, the second eave can be formed with a minimum protruding length for obtaining a predetermined reflection efficiency by eliminating a useless portion that does not contribute to the reflection of the second eave.
[0026]
In the double eaves system according to the third aspect, the projecting dimension of the first eave is formed by D, and the gap between the first eave and the second eave is set to D to 1.5D. In a strong time zone, it is possible to prevent sunlight from entering between the two eaves, and efficiently take in sunlight reflected on the second eaves as indirect illumination light into the building.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a window to which a double eaves system according to the present invention is attached.
FIG. 2 is an explanatory diagram showing an area where sunlight enters a building when a projection size of a first eave and a second eave is 420 mm.
FIG. 3 is an explanatory diagram showing an area where sunlight enters a building when a projection size of a first eave is 420 mm and a projection size of a second eave is 600 mm.
[Explanation of symbols]
Reference numeral 3 denotes an outer wall, 5 denotes a window, 7 denotes a first eave, 9 denotes a second eave, 15 denotes a gap, 21 denotes a double eave system, and 23 denotes a ceiling surface.

Claims (3)

At the upper end of the opening outside the window of the building , horizontal eaves are arranged vertically in two stages , so that sunlight passing through the window and directly entering the building is blocked by the eaves. It is a double eaves system that reflects the sunlight radiated on the upper surface of the building to a ceiling surface in the building by passing through the window portion,
A first eaves provided at the upper end of the opening of the window,
A second eave provided below the first eave with a gap therebetween,
The first eaves block sunlight trying to directly enter the building from the gap between the upper end of the opening and the second eaves,
A double eaves system, wherein the second eaves block sunlight trying to directly enter the building, and reflect the sunlight irradiated on the upper surface to a ceiling surface. A protrusion dimension of the first eave in a direction perpendicular to the outer wall is formed as D,
2. The double eaves system according to claim 1, wherein a projecting dimension of the second eave in a direction perpendicular to the outer wall is D to 1.5D. 3. A protrusion dimension of the first eave in a direction perpendicular to the outer wall is formed as D,
The double eaves system according to claim 1 or 2, wherein a gap between the first eaves and the second eaves is set at D to 1.5D.

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