JP2000129792A - Building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure thermal insulation and natural lighting by providing an upper opening opening outdoors in the vicinity of the ceiling on a wall of a room of a building, providing a small roof under the upper opening, and arranging a reflecting means for reflecting the sunlight on the upper surface side of the small roof. SOLUTION: An upper opening opening outdoors is provided in an outer wall R1 above a mirror 91 of a lavatory S of a building so that a fixed fitting type window sash 2B is arranged in the upper opening. Eaves 5B are provided in a height position of an upper half of the lavatory S in the upper part of the upper opening so as to project outward, and a reflector 51B for reflecting the sunlight is provided on the upper surface side of the eaves 5B. The reflected light reflected by the surface of the reflector 51B enters the lavatory S through the window sash 2B, and is reflected again by the ceiling surface S1, so that natural lighting in the lavatory S can be obtained by this indirect light. The ceiling surfaces S1 of the lavatory S is formed in a recess/projection shape, and a surface finishing material of the ceiling surface S1 may also be formed of a raw material having high reflectance such as a white color to thereby secure thermal insulation and natural lighting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building having a mechanism capable of illuminating a room by taking in natural light.

[0002]

2. Description of the Related Art As a window of a conventional detached house, an opening area is generally enlarged in order to obtain sufficient lighting. By the way, by increasing the opening area of the window, sufficient brightness can be obtained, but on the other hand, the amount of solar radiation that infiltrates in the summer also increases. The problem of not being able to obtain is growing.

[0003] In order to block the solar radiation, a down-type blind is arranged along a window glass and an eave is used. Recently, instead of disposing blinds, a heat shield type window glass has been used (for example, see Japanese Utility Model Publication No. 4-23185).

[0004]

However, due to restrictions on the site of the residential area (for example, in the case of a three-story house),
Effective eaves may not be installed. For this reason, sunlight can be blocked by the eaves, but it is difficult to take light. In addition, the use of a heat shield type window glass is certainly effective as a measure against summer heat, but on the contrary, it is difficult to receive solar radiation in winter and it is difficult to obtain daytime warmth, However, there is a problem that heating costs are high and the cost is high.

The entrance porch of a house protrudes a roof panel longer than a wall surface on which an entrance opening is installed to provide effects such as a feeling of shading and an effect of preventing rain when entering and exiting. In many cases, the design plan did not allow for the opening of the entrance hall, and there was a problem that the entrance, which was the only opening, had a long overhanging roof panel that did not allow sufficient lighting and the entrance was dark during the day. .

[0006] In order to solve such a problem, for example, Japanese Utility Model Application Laid-Open No. 56-61623 discloses a means for keeping the entrance entrance bright by providing a lighting window in a part of the roof panel of the entrance porch. ing. However,
In this case, there is a problem in that the effect of shading, which is one of the functions of the entrance porch, is adversely affected.

[0007] Further, in a kitchen or a washroom of a house, for example, a storage cabinet is installed, so that an opening such as a window has a small opening area at one place, and the kitchen and the washroom are formed in a building. It is generally located on the north side, and as a result, it tends to be dark even in the daytime.

In order to solve such a problem, for example, in Japanese Utility Model Laid-Open Publication No. Sho 57-84607, a reflection panel is attached to a flower box provided outside a window of a room, and sunlight reflected by the reflection panel is provided. There is disclosed a structure in which the light is introduced into a room through a window and reflected on a ceiling surface of the room. However, in this case, if there is a protrusion such as a storage cabinet at the top of the window, such as in a kitchen or washroom, the light reflected by the reflective panel will be blocked by the cabinet, and There is a problem that it is difficult to incorporate.

It is an object of the present invention to provide a building which can secure heat shielding and lighting which are difficult to balance.

Another object of the present invention is to provide a kitchen, a washroom,
Another object is to provide a building that can secure lighting at the entrance of the entrance.

[0011]

According to a first aspect of the present invention, there is provided a building having an upper opening which is open to the outside on a wall of at least one room of the building near a ceiling, and which is provided below the upper opening from the wall. A small roof projecting to the outdoor side is provided, and the small roof is located at the height of the upper half of the room, and a reflection means for reflecting sunlight is provided on the upper surface side of the small roof.

Here, the sunlight is not limited to so-called direct sunlight, but includes so-called daylight, which brightens a portion that is shadowed by direct sunlight due to scattering of the atmosphere. It also includes light that reflects sunlight at the top of the building and guides it down.
The reflecting means is means for guiding the light reflected by the reflecting means from the opening into the room.

According to a second aspect of the present invention, in the building of the first aspect, a lower opening of the room is provided below the small roof, and the small roof serves as an eave of the lower opening.

According to a third aspect of the present invention, there is provided the first or second aspect.
In the described building, an entrance doorway is provided below the small roof.

The invention described in claim 4 is the first to third aspects of the present invention.
In the building according to any one of the above, the reflection means concentrates light reflected on the surface of the small roof to the upper opening. The method of concentrating the reflected light includes not only the method of concentrating the parallel light so as to have a focal point, but also the method of concentrating the light reflected by the reflection surface wider than the area of the upper opening while keeping the light parallel.

[0016] The invention according to claim 5 provides the invention according to claims 1 to 4.
In the building according to any one of the above, an opening through which light passes is provided at an upper part of the room between the room and an adjacent room.

The invention according to claim 6 is the invention according to claims 1 to 5
In the building according to any one of the above, reflection means is provided on a ceiling surface of the room.

The invention according to claim 7 is the invention according to claims 1 to 6
In the building according to any one of the above, a storage portion is provided in the room below the upper opening. Examples of the storage section include a storage section that uses the entire lower part of the upper opening for storage, a storage cabinet that is provided above the wall below the upper opening, and a top plate that is disposed below the wall. .

(Function) In the building according to the first aspect of the present invention, a small roof is provided on the wall of one room, which is open to the outside and protrudes from the wall to the outdoor side below an upper opening provided near the ceiling. The small roof is located at the height of the upper half of the room, and the reflecting means for reflecting the sunlight is provided on the upper surface side of the small roof. The reflected light can be taken into the room through the opening as reflected indirect light, so that the lighting in the room can be obtained.

According to the second aspect of the present invention, since the small roof is an eave of the lower opening of the room provided therebelow, the eaves shield the solar heat entering the room from the lower opening. be able to.

According to the third aspect of the present invention, since the entrance entrance is provided below the small roof, the sunlight reflected by the reflection means provided on the upper surface side of the small roof receives the sunlight reflected through the upper opening. It can be taken in as reflected indirect light inside, so that lighting in the entrance hall can be obtained.

According to the fourth aspect of the present invention, since the reflecting means concentrates the light reflected on the surface of the small roof in the upper opening, the lighting in the entrance hall can be efficiently obtained through the upper opening. .

According to the fifth aspect of the present invention, an opening through which light passes is provided in an upper part of the room between an adjacent room (or corridor).
The reflected indirect light taken in the described invention can be taken. For this reason, it is possible to obtain lighting in an adjacent room (or corridor).

In the invention according to claim 6, claim 1 is
The interior of the room can be made brighter by reflecting and indirectly applying the reflected indirect light taken in the described invention by the reflection means provided on the ceiling surface of the room. In addition, it is possible to efficiently obtain lighting in an adjacent room (or corridor).

According to the seventh aspect of the present invention, since the storage section is provided in the room below the upper opening, not only can the storage area beneath the upper opening be used for storage, but the storage section can be used for lighting. It can block eyes from outside.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. In addition, only the vicinity of the opening of the building will be described, and the description of the other portions will be omitted. FIG. 1 is a partial sectional view showing a first embodiment of the present invention.

In the figure, S is a washroom having a washstand 9 and a mirror 91. An upper opening 2 is provided in an outer wall R1 located above the mirror 91 near the ceiling of the washroom S. The upper opening 2 is provided with a fitting-type window sash 2B. The entire surface of the window sash 2B is made of a transparent or translucent member such as glass or acrylic resin. In addition, a light scattering material such as a glass block or frosted glass may be used. Below the upper opening 2, a plate-shaped eave 5B is provided at a height of an upper half of the room so as to protrude outward. On the upper surface side of the eaves 5B, a reflector 51B that reflects sunlight is installed. This reflecting plate 51B is
For example, a white paint layer is formed on the surface of an aluminum plate, and has a reflectance of 70%. It is desirable that the direction of the reflecting plate 51B is set so that the reflected light is concentrated on the upper opening 2.

In the case of the first embodiment, the light reflected on the surface of the reflection plate 51B provided on the upper surface side of the eaves 5B enters the washroom S through the window sash 2B of the upper opening 2, and the ceiling surface S1 The light in the washroom S is obtained by this indirect light. In addition, the sunlight or daylight that directly reaches the upper opening 2 without being reflected contributes to brightening the interior of the washroom S.

Further, the ceiling surface of the washroom S is made uneven,
Moreover, by making the surface finish of the ceiling surface a material having a high reflectance such as white, the reflected indirect light introduced into the washroom S can be further diffused in the washroom S.

Furthermore, by making the window sash 2B openable and closable, ventilation in the washroom S where moisture tends to be trapped can be ensured, and comfort is improved. In this case, the opening serving as the other entrance of the ventilation path may be provided in the space between the adjacent rooms. The washstand can be used as a storage unit.

FIG. 2 is a partial perspective view showing a second embodiment of the building of the present invention, and FIG. 3 is a schematic explanatory view showing a use state of FIG.

In the figure, K is a kitchen having a sink 10 and a storage unit 11 which is a hanging cabinet. An outer wall R1 located near the ceiling of the kitchen K and above the storage unit 11
Has an upper opening 2. The upper opening 2 is provided with an openable window sash 2C. The window sash 2C is entirely made of a transparent or translucent member such as glass or acrylic resin. In addition, a light scattering material such as a glass block or frosted glass may be used.

On the other hand, an outer wall R1 located between the storage section 11 and the sink 10 has a lower opening 3. The lower opening 3 is provided with a window sash 3C. Window sash 3C
Is a sliding type, and the whole surface is made of a transparent or translucent member such as glass or acrylic resin.
Note that a light scattering material such as a glass block or frosted glass may be used.

A plate-like eave 5C, which is a small roof, is provided below the upper opening 2 at a height of an upper half of the room so as to protrude outward. On the upper surface side of the eaves 5C, a reflecting plate 51C that reflects sunlight is installed. This reflection plate 51C
Is obtained by forming a white paint layer on the surface of the same aluminum plate as in the first embodiment.

In the case of the second embodiment, the reflected light reflected on the surface of the reflecting plate 51C installed on the upper surface side of the eaves 5C enters the kitchen K through the window sash 2C of the upper opening 2, and enters the ceiling surface K1. The light in the kitchen K is obtained by this indirect light. And kitchen K
By making the ceiling surface K1 in the interior of the kitchen K uneven, and by making the surface finishing material of the ceiling surface K1 a material having a high reflectance such as white, the reflected indirect light taken into the kitchen K can be used.
Can be further diffused within. The sunlight or daylight that directly reaches the upper opening 2 without being reflected contributes to brightening the interior of the kitchen K.

Further, direct light from above trying to enter the vicinity of the sink 10 of the kitchen K through the lower opening 3C is blocked by the eaves 5C, and direct light from entering the kitchen K is blocked. For this reason, direct light that invades due to the formation of a sunshade down to the lower end of the lower opening 3C can be blocked, and intrusion of solar radiation in summer can be particularly suppressed.

Further, by making the window sash 2C openable and closable and taking a ventilation path (not shown), ventilation in the kitchen K where moisture and odor tend to be trapped can be ensured, and comfort is improved. Further, as shown in FIG. 3, since the storage section 11 is provided below the upper opening 2, it is possible to block direct line of sight from the outside during ventilation and lighting.

FIG. 4 is a schematic explanatory view showing a third embodiment of the building according to the present invention together with a use state, and FIG. 5 is an enlarged perspective view showing a main part of FIG.

As shown in the figure, R is a living room facing the south side of the detached house, and a large opening 1 is provided in the outer wall R1 on the south side. The opening 1 is vertically divided into two parts by a horizontal frame member 4 and has an upper opening 2 and a lower opening 3. As shown in FIG. 5, the upper opening 2 is a fitting window sash 2.
A, and the lower opening 3 is a sliding window sash 3A of a sweeping size. In addition, window sash 2
A and 3A are both transparent or translucent.

Reference numeral 5 denotes a plate-like eave which is a small roof having a predetermined projection size, and is provided so as to protrude outward from a horizontal frame member 4 that partitions the upper opening 2 and the lower opening 3. A U-shaped edging plate 51 is fixed to the periphery of the upper surface of the eaves 5 located at the height of the upper half of the eaves 5. On the upper surface side of the eaves 5, a reflection plate 52 that reflects sunlight is installed so as to be inclined downward from the tip side of the eaves 5 toward the horizontal frame member 4. The reflection plate 52 is formed by forming a white paint layer on the surface of an aluminum plate similar to that of the first embodiment. As shown in FIG. 4, the outgoing dimension of the eaves 5 is set such that a shade is formed up to the lower end of the lower opening 3 in summer when the height of the sun is highest.

In order to prevent rainwater from concentrating on the upper opening 2, a gap is preferably provided between the reflection plate 52 and the upper opening 2, and rainwater is preferably allowed to flow from the gap to the rain gutter. . For example, the upper surface of the eaves ceiling below the reflecting surface may be inclined so that the rainwater received by the reflecting plate 52 flows down the downspout at the farthest part from the living room. Further, drain holes may be provided in some places of the reflection plate 52.

Further, an eave 5A similar to the above is provided above the upper opening 2. No reflection plate is provided on the upper surface side of the eaves 5A, and it is an ordinary general one. In this case, as in the above case, the outgoing dimension of the eaves 5A is set so that the sunshade is formed up to the lower end of the upper opening 2 in summer when the height of the sun is the highest, as shown in FIG. R2 is a ceiling surface, and R3 is a floor surface.

Next, the usage of the window eaves 1 will be described. As shown in FIG. 4, in summer when the solar altitude is high, direct light from above trying to enter the southern living room R through the upper opening 2 and the lower opening 3 is blocked by the two eaves 5 and 5A, respectively. You. For this reason, direct invasion of light into the living room R is blocked. For this reason, direct light that enters the room can be blocked by the formation of a shade up to the lower end of the lower opening, and intrusion of solar radiation in summer can be particularly suppressed.

On the other hand, the reflecting plate 5 installed on the upper surface side of the eave 5
The light reflected on the upper surface of the upper opening 2 is a window sash 2 of the upper opening 2.
The light enters the living room R through A and is reflected again on the ceiling surface R2, so that the lighting in the living room R can be obtained by the indirect light.

In the case of the third embodiment, the reflecting plate 52 is
Is installed so as to be inclined downward from the front end side toward the horizontal frame member 4 side, so that indirect light entering the living room R can be increased.

In winter when the solar altitude is low, as shown in FIG. 6, direct light can be positively introduced into the living room R through the upper opening 2 and the lower opening 3, so that warmth in the daytime is obtained. be able to. Therefore, the heating load does not increase, and the heating cost can be reduced.

In the above embodiment, a single reflecting plate 52 having a white paint layer formed on the surface of an aluminum plate was used as the reflecting means for reflecting sunlight. Instead of this reflecting plate, FIG. A plurality of strip-shaped reflective pieces 521A as shown
The reflection louver 52A made of Each reflective piece 5
As shown in FIG. 7, both ends of 21A are fixed to the edging plate 51 so that the inclination gradually decreases from the tip side of the eave 5 toward the horizontal frame member 4 as shown in FIG. I have. The reflection piece 52 has a white paint layer formed on the surface of a synthetic resin piece, for example.

As described above, the reflected light reflected on the surface of the reflection louver 52A can be introduced into the interior of the room R through the upper opening 2. In addition, by adopting a louver-shaped structure, the structure is hardly affected by wind blow-up and the like, and can be realized with a material and a structure that are simple in strength.

In this embodiment, each reflecting piece 521A
Although there is an overlap, the reflecting pieces 521A may be separated from each other in the horizontal direction so that rainwater does not concentrate on the upper opening side.

FIG. 8 is a schematic explanatory view showing a fourth embodiment of the building of the present invention. As shown in FIG. 8, the upper part of the door 6 of the partition R4 opening that partitions between the living room R having the eaves 5 and the corridor T adjacent to the living room R and located on the opposite side to the eaves 5 is transparent. Alternatively, the third embodiment is basically the same as the third embodiment except that a lighting space R41 in which translucent glass is fitted is provided. The space R41 is also for ensuring ventilation, and can be opened and closed by appropriate means. Further, an acrylic resin plate may be used instead of glass.

In the case of the fourth embodiment, the reflected light reflected on the upper surface of the reflecting plate 52 provided on the upper surface side of the eaves 5 enters the living room R through the window sash 2A of the upper opening 2, and this living room R The indirect light re-reflected on the ceiling surface R2 is transmitted to the transom R4.
1 to reach the corridor T side. As a result, the lighting on the corridor T side can be obtained with this indirect light.

FIG. 9 is a partial perspective view showing a fifth embodiment of the building of the present invention, and FIG. 10 is a schematic explanatory view showing the use state of FIG.

In the drawing, U is a unit type building, and is constructed by combining a plurality of lower units U1 and upper units U2, which are building units. An opening is formed in a part of the outer wall R1 of the lower unit U1, and an entrance porch 7 for an entrance is installed. The upper opening is a window sash 72 for lighting, and is provided near the ceiling of the entrance hall. The lower opening is an entrance door 73 which is an entrance of the entrance. The window sash 72 is a transparent or translucent glass or acrylic resin plate. In addition, the window sash 72 may be a fitting type or a type that can be opened and closed.

The roof panel 7 which is a small roof of the entrance porch 7
The upper surface of 1 is a flat reflector 711 that reflects sunlight. The reflection plate 711 is, for example, a roof panel 71.
Has a white paint layer formed on the surface of the steel plate constituting the above, and has a high reflectance. The roof panel 71 is provided at the height of the upper half of the entrance hall, and is located above the entrance door 73 below the upper opening. 75 is a support.

In the case of the fifth embodiment, as shown in FIG. 10, the sunlight reflected by the reflector 711 provided on the roof panel 71 of the entrance porch 7 is passed through the window sash 72 for lighting. It can be taken in the hall U11 as reflected indirect light. For this reason, entrance hall U1
Even in the floor plan where there is no opening other than the entrance at 1, the brightness in the entrance hall U11 can be obtained.

Further, the ceiling surface of the entrance hall U11 is made uneven, and the surface finishing material of the ceiling surface is made of a material having a high reflectance such as white, so that the natural light introduced into the entrance hall U11 is reflected. Indirect light can be further diffused in the entrance hall U11.

In the fifth embodiment, the sunlight is reflected only by the flat reflecting plate 711 in which the white paint layer is formed on the surface of the steel plate constituting the roof panel 71, as shown in FIG. As described above, a transparent condenser prism 712 having a sawtooth cross section as shown in the figure may be provided above the roof panel 71. In this case, as shown in FIG. 13, the condensing prism 712 has a condensing function of changing the reflection angle at the flat portion 712b to reflect sunlight incident from the curved surface portion 712a and reflected on the bottom surface. For example, made of acrylic resin. Note that the installation angle of the condenser prism 712 may be changed by appropriate means in accordance with a change in the seasonal solar altitude.

As described above, by installing the condenser prism 712 on the upper surface of the roof panel 71, the sunlight reflected on the upper surface of the roof panel 71 is efficiently condensed on the window sash 72 for lighting. I can guide you. As a result, the brightness in the entrance hall U11 can be further improved.

FIG. 14 is a partial perspective view showing a sixth embodiment of the building of the present invention, and FIG. 15 is a schematic explanatory view showing the use state of FIG.

As shown in FIG. 14 and FIG. 15, the upper opening is approximately 40 obliquely upward toward the inside of the entrance hall U11.
A window sash 72A inclined by about 50 degrees is used as the window sash 7A.
Except that a reflecting plate 8 that reflects sunlight is provided below the floor surface U21 of the upper floor unit U2 located above 2A, it is basically the same as the above fifth embodiment, Are denoted by the same reference numerals and description thereof is omitted. The reflecting plate 8 is formed by forming a white paint layer on the surface of a steel plate, and is substantially the same as the reflecting plate 711 in the fifth embodiment.

In the case of the sixth embodiment, as shown in FIG. 15, the reflected light reflected by the reflector 711 provided on the upper surface of the roof panel 71 of the entrance porch 7 is below the floor U21 of the upper floor unit U2. The light is re-reflected by the reflection plate 8 and can be efficiently introduced into the entrance hall U11 as reflected diffused light to the back through the window sash 72A for lighting.
For this reason, even in a floor plan where there is no opening other than the entrance in the entrance hall U11, it is possible to obtain lighting in the entrance hall U11.

Since the lower part of the upper floor unit U2 on which the reflection plate 8 is installed functions as an eave of the window sash 72A, it is possible to prevent direct light from entering the entrance hall U11. Can only be secured.

In the first to second and fourth to sixth embodiments,
Although the eaves are not provided directly above the upper opening, an eaves may be provided immediately above the upper opening as in the third embodiment. The buildings in the first to fourth embodiments may be unit buildings.

[0064]

According to the present invention, the sunlight reflected by the reflection means provided on the upper surface side of the small roof can be taken into the room as reflected indirect light through the upper opening. You can get the lighting in the room.

According to the second aspect of the present invention, since the small roof serves as an eave of the lower opening of the room provided thereunder, the eaves shield the solar heat that enters the room from the lower opening. be able to.

According to the third aspect of the present invention, the sunlight reflected by the reflection means provided on the upper surface side of the small roof can be taken into the entrance hall as reflected indirect light through the upper opening. Daylighting can be obtained.

According to the fourth aspect of the present invention, since the reflecting means concentrates the light reflected on the surface of the small roof in the upper opening, it is possible to efficiently obtain the daylight into the entrance hall through the upper opening. it can.

According to the fifth aspect of the present invention, the reflected indirect light introduced in the first aspect of the present invention is passed between an adjacent room (or corridor) through an opening provided in the upper part of the room and through which light passes. It can be taken in, and the lighting in the adjacent room (or corridor) can be obtained.

According to the sixth aspect of the present invention, the reflection means provided on the ceiling surface of the room reflects the reflected indirect light taken in by the first aspect of the invention to thereby take in the adjacent room ( Alternatively, the lighting in the corridor can be efficiently obtained.

According to the seventh aspect of the present invention, since the storage section is provided in the open room, the line of sight can be blocked by the storage section when lighting is performed.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing a first embodiment of the present invention.

FIG. 2 is a partial perspective view showing a second embodiment of the present invention.

FIG. 3 is a schematic explanatory view showing a use state of FIG. 2;

FIG. 4 is a schematic explanatory view showing a third embodiment of the present invention together with a use state.

FIG. 5 is an enlarged perspective view showing a main part of FIG. 4;

FIG. 6 is a schematic explanatory view showing another use state of FIG. 4;

FIG. 7 is an enlarged sectional view showing a modification of FIG.

FIG. 8 is a schematic explanatory view showing a fourth embodiment of the present invention.

FIG. 9 is a partial perspective view showing a fifth embodiment of the present invention.

FIG. 10 is a schematic explanatory view showing a use state of FIG. 9;

FIG. 11 is a partial perspective view showing a modification of FIG. 9;

FIG. 12 is a schematic explanatory view showing a use state of FIG. 11;

FIG. 13 is an enlarged sectional view showing a main part of FIG.

FIG. 14 is a partial perspective view showing a sixth embodiment of the present invention.

FIG. 15 is a schematic explanatory view showing a use state of FIG. 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Window 2 Upper opening 2A, 2B, 2C Window sash 3 Lower opening 3A, 3B, 3C Window sash 4 Horizontal frame material 5, 5A, 5B, 5C Eaves (small roof) 51B, 51C Reflector 52 Reflector 6 Door 7 Entrance Porch 71 Roof panel (small roof) 711 Reflector 72, 72A Window sash 8 Reflector 11 Storage room R Living room R1 Exterior wall R2 Ceiling surface R3 Floor surface R4 Partition R41 Room K Kitchen S Washroom T Corridor U Building U1 Lower unit U11 Entrance hall U2 Upper unit U21 Floor

Claims (7)

[Claims] 1. An at least one room wall of a building is provided with an upper opening that opens outdoors near the ceiling, and a small roof projecting from the wall to the outdoor side is provided below the upper opening. Is located at the height of the upper half of the room, and reflection means for reflecting sunlight is provided on the upper surface side of the small roof. 2. The lower opening of the room is provided below the small roof, and the small roof is an eave of the lower opening.
The mentioned building. 3. The building according to claim 1, wherein an entrance is provided below the small roof. 4. The building according to claim 1, wherein the reflecting means concentrates light reflected on the surface of the small roof at the upper opening. 5. The building according to claim 1, wherein an opening for transmitting light is provided at an upper part of the room between adjacent rooms. 6. The building according to claim 1, wherein a reflecting means is provided on a ceiling surface of the room. 7. The building according to claim 1, wherein a storage part is provided in the room below the upper opening.