JP6021103B2 - Daylighting louver unit - Google Patents

Description

  The present disclosure relates to a daylighting louver unit.

  In recent years, various environmental technologies in consideration of the global environment have been proposed. There are no exceptions in the lighting field, and various technologies for energy saving have been proposed. Among the lighting fields, there are techniques as disclosed in Patent Documents 1 to 4 for ensuring the brightness inside a building.

  Patent Document 1 discloses an indoor daylight adjusting device, in which a plurality of shaped bodies having a specular reflective surface are arranged in the vertical direction. An outer daylight hole and an inner daylight hole are formed between the molded bodies to guide light from the outside into the room.

  Patent Document 2 discloses a small and light shelf-like daylight system, and the system includes a plurality of light reflecting elements having the same shape. The element includes light reflecting means on the upper surface, light shielding means for blocking light at a low altitude, and means for changing the direction of light coming from adjacent elements.

  Patent Document 3 proposes a technique in which a solar battery cell that converts light into electricity is mounted on one surface of a louver of a blind that is enclosed in a double-glazed glass. Here, a daylighting surface portion that reflects light on the other surface of the louver and takes the reflected light into the room is formed. Thereby, in addition to the function (insulation, soundproofing, crime prevention, etc.) of the conventional multi-layer glass, it aims at performing both indoor lighting and solar power generation appropriately.

  Patent Document 4 discloses a technique of attaching a mechanism having a natural daylighting action to a building on a monitor roof having a ventilation action. Natural light incident from the upper opening at the top of the building is guided to the lower opening while being reflected by the diffuse reflection sheet material or the specular reflection sheet material, and is diffused into the building through the louver unit.

JP 61-254788 A US Pat. No. 6,714,352B2 JP 2007-231613 A JP 2011-140810 A

  The present disclosure provides a daylighting louver unit suitable for practical use, which can also ensure the brightness of a building with natural light by more efficiently introducing natural light.

The daylighting louver unit of the present disclosure is a daylighting louver unit that can be arranged on a wall of a building and introduces external natural light into the building, and includes a first surface on which natural light enters and the first surface. A housing including a second surface opposite to the first surface, wherein at least a part of the first surface and at least a part of the second surface are formed of a transparent member, and a predetermined interval inside the housing. And a plurality of louvers that supply natural light introduced from the first surface to the second surface side, and in the housing, at a predetermined position in the longitudinal direction of each louver, A louver support member provided to prevent bending , a transparent light diffusing member is provided between the louver and the second surface, and an elastic member disposed on the louver includes the light Expansion Contacts with the member, biasing the light diffusing member to the second surface side.

  According to the present disclosure, the practicality of a daylighting louver unit that can ensure the brightness of a building with natural light can be enhanced by more efficiently introducing natural light.

The figure which shows the state in which the lighting louver unit of embodiment was equipped near the wall of the building Exploded perspective view of the daylighting louver unit of the embodiment Cross section of daylighting louver unit Louver side view Image diagram showing the direction of travel of light introduced by the louver Exploded perspective view of louver and louver support piece (A), (b) is sectional drawing which shows the relationship between the louver and the louver support member in the upper and lower portions of the daylighting louver unit The figure which shows a mode that the elastic member attached to the louver is contacting the light-diffusion member in the area | region shown by Y of FIG. The figure which shows the visual field control film affixed on the glass of the 1st surface of a housing The figure which shows the function which prevents the light emission from the louver to the outside passerby by the visual field control film Graph showing the effect of daylighting louver unit

  Hereinafter, preferred embodiments of the daylighting louver unit of the present disclosure will be described in detail based on the drawings.

  FIG. 1 is a diagram illustrating a state in which a daylighting louver unit 1 according to an embodiment is installed near a wall 110 of a building 100. The daylighting louver unit 1 can be arranged on the wall 110 of the building 100 and is an apparatus for introducing external natural light NL into the building 100. In recent years, various environmental technologies in consideration of the global environment have been proposed. The daylighting louver unit 1 is also one of such environmental technologies. This is a technique for reducing the power for lighting inside the building and saving energy by making the maximum use of natural light NL entering R.

  The natural light NL is sunlight, but the solar altitude and direction change depending on factors such as time of day and season, and its traveling direction and intensity change. Under such circumstances, the daylighting louver unit 1 aims to use natural light NL as much as possible and deliver light to the back of the interior R of the building 100.

  The daylighting louver unit 1 is arranged on the glass 120 arranged on the wall 110 of the building 100 with an interval of several mm. In particular, the daylighting louver unit 1 according to the present embodiment is disposed on the walls 110 and the glass 120 of the level, and efficiently supplies the introduced natural light NL toward the ceiling surface 130 in the interior R of the building 100. A wooden blind 150 is provided below the daylighting louver unit 1. However, the place where the daylighting louver unit 1 is disposed is not limited to the illustrated place.

  The natural light NL supplied to the ceiling surface 130 is reflected by the ceiling surface 130 and delivered to the back of the interior R of the building 100. In order to efficiently reflect the natural light NL, a reflecting plate, a reflecting film, or the like may be installed on the ceiling surface 130.

  FIG. 2 is an exploded perspective view of the daylighting louver unit 1. The daylighting louver unit 1 basically includes a box-shaped housing 10 and a plurality of louvers housed in the housing 10. Furthermore, in this embodiment, the light diffusing member 50 is disposed inside the housing 10. The light diffusing member 50 will be described in detail later.

  The housing 10 is composed of a rectangular parallelepiped having six surfaces, and houses therein a plurality of louvers 30 to prevent dust and the like from adhering to the louvers 30 that require high light reflectivity. . The size of the housing 10 is set to, for example, length L (1800 mm) × height H (700 mm) × depth D (85 mm), but is not particularly limited.

  Although the material of the housing 10 is not particularly limited, at least a part of each of the first surface 11 and the second surface 12 needs to be configured by a transparent member such as glass in order to pass light. In the present embodiment, the entire surfaces of the first surface 11 and the second surface 12 are made of glass. For housing the louver 30 and the light diffusing member 50, the second surface 12 can rotate in the direction of arrow S.

  Inside the housing 10, a plurality of louvers 30 are arranged at predetermined intervals in the height direction of the housing 10. The louver 30 plays a role of supplying the natural light NL introduced from the first surface 11 of the housing 10 to the second surface 12 and eventually to the inside R side of the building 100. Each louver 30 is disposed inside the housing 10 so as to extend substantially parallel to each other along the longitudinal direction thereof.

  Further, in the present embodiment, as shown by a dotted line in FIG. 2, a louver support member 70 is provided at a predetermined position in the longitudinal direction of the louver 30 in order to prevent the louver 30 from being bent. In the present embodiment, the louver support member 70 is provided at a substantially central position in the longitudinal direction of the louver 30.

  FIG. 3 is an enlarged view of a region around the daylighting louver unit 1 in FIG. The daylighting louver unit 1 is attached to a part of the building 100 via a fastener 140. As shown in FIG. 3, the louver support member 70 is composed of a plurality of support member pieces 71 arranged between two louvers 30 or between the louver 30 and the housing 10. The louver support member 70 and the support member piece 71 will be described in detail later.

  The louver 30 has a substantially triangular cross section and is made of a metal member such as aluminum. However, the material of the louver 30 is not particularly limited as long as it has a surface treatment capable of reflecting light. The surface of the louver 30 may be the original material or may be subjected to special processing for light reflection. A light reflecting film may be attached to the surface of the louver 30.

  FIG. 4 is a diagram showing an optical transmission line (channel) CH established between two louvers 30. The basic function of the louver 30 is exhibited by the optical transmission line CH established between the two louvers 30. The optical transmission line CH is defined by the four surfaces A, B, C, and D of the first and second louvers 30. The planes A, C and D constitute a cross-sectional profile similar to a so-called zenith anidic concentrator. The cross-sectional shape of the louver 30, that is, the louver profile is constant along the longitudinal direction of the louver 30, but it is not essential.

  The louver profile presents a substantially triangular shape having a leading edge (point H), a trailing edge (point I), and a vertex (point E). The leading edge (point H) and the trailing edge (point I) may be configured in a planar shape (planar or curved surface).

  The surface A is composed of a parabolic reflecting surface or a parabolic condensing surface, collects incident light (natural light NL) that has passed through the entrance aperture CH1, and reflects the light to the entrance aperture CH2 so that it is reflected by the small entrance aperture CH2. Lead to. That is, the surface A is designed so that a light beam that hits the surface A as a paraboloid when the elevation angle α is 90 ° or less appropriately passes through the entrance opening CH2.

  The definition of the elevation angle α and an example of a light ray L1 having an elevation angle α of 90 ° passing through the entrance aperture CH2 after being reflected by the surface B is shown in FIG. As shown in FIG. 4, this phenomenon occurs when the vertex (point F) of the surface A (parabolic surface) is in focus (point E) so that the curve of the paraboloid intersects the end (point G) of the surface D. This happens because you are at an appropriate distance directly below.

  The surface B is a flat surface. Incident light that has bounced off surface B is directed toward surface A. As long as the reflected light exits from the surface A at an elevation angle of 90 ° or less, it strikes the paraboloid of the surface A and enters the entrance opening CH2 (L1 is an example thereof). Ideally, the angle of the surface B with respect to the horizontal is 45 °, so that the horizontal light is reflected by the surface B toward the surface A directly below. In that case, any incident light having an elevation angle α of 0 ° or more travels appropriately into the entrance opening CH2.

  The light beam that has passed through the entrance opening CH2 is reflected by the surfaces C and D, and supplied from the exit opening CH3 toward the ceiling surface 130 of the interior R of the building 100. The planes C and D constitute a so-called compound parabolic concentrator (CPC), and the maximum output angle of the emitted light is designed to be 20 °, for example. Therefore, the output range of the louver of this embodiment is between 0 ° and 40 ° from the horizontal regardless of the direction of the incident light, but such an angle setting is not particularly limited.

  FIG. 5 is an image of introducing natural light NL from the louver 30 of the present embodiment into the interior R of the building 100 (natural lighting image). In this way, effective use of natural light NL is achieved with respect to securing light inside the building.

  FIG. 6 shows an exploded perspective view of the louver 30 and a plurality of support member pieces 71 constituting the louver support member 70. As shown in FIG. 2, the plurality of louvers 30 are arranged inside the housing 10 so as to extend substantially parallel to each other along the longitudinal direction thereof. The louver support member 70 is provided at a substantially central position in the longitudinal direction of the louver 30, and can effectively prevent the louver 30 from being bent or bent.

  In the present embodiment, the louver support member 70 is composed of a plurality of support member pieces 71 disposed between the two louvers 30 or between the louver 30 and the housing 10. FIG. 6 shows a support member piece 71 disposed between two louvers 30.

  At least a part of the plurality of support member pieces 71 disposed between the two louvers 30 has a shape shown in FIG. That is, the support member piece 71 is inserted into a main body 72 having two joint surfaces that match the two surfaces of the louver 30 and a hole 72a extending from the main body 72 and formed in the louver 30 and the other support member piece 71a. The rod-shaped connection member 73 is provided.

  The support member piece 71 is configured by joining a main body 72 formed of a transparent material such as acrylic resin and a rod-shaped connection member 73 formed of a metal material such as stainless steel.

  As shown in FIG. 3, the main body 72 has a shape in which the upper surface matches the surface B and the surface C (FIG. 4) of the louver 30. On the other hand, the lower surface of the main body 72 has a shape that conforms to the surface A and the surface D (FIG. 4) of the louver 30. For this reason, the louver 30 and the support member piece 71 are firmly assembled when the louver 30 and the support member piece 71 are assembled, and an accurate natural light introducing effect by the louver 30 is obtained.

  The rod-shaped connecting member 73 is joined to the main body 72 with an adhesive or the like so as to extend from the lower surface of the main body 72. When the louver 30 and the support member piece 71 are assembled, the connecting member 73 is inserted into a circular louver hole 30A formed so as to penetrate the top and bottom of the louver 30, and after passing through the louver hole 30A, another support It is inserted into a circular hole 72 a formed in the main body 72 of the member piece 71.

In this embodiment, although the dimension of each part is set as follows, it is an example to the last and is not specifically limited.
-Diameter of main body 72: 10 mm
-Diameter of rod-shaped connecting member 73: 4 mm
-Diameter of louver hole 30A: 4.5mm
・ Diameter 4.5mm of hole 72a of body 72

  7A is a cross-sectional view showing the relationship between the louver 30 and the louver support member 70 in the upper part of the daylighting louver unit 1, and FIG. 7B is a louver 30 and louver support in the lower part of the daylighting louver unit. FIG. 6 is a cross-sectional view showing the relationship of members 70 7A and 7B show support member pieces 71b and 71c disposed between the louver 30 and the housing 10. FIG. The support member pieces 71b and 71c are different in shape from the support member pieces 71 and 71a of FIG.

  The support member pieces 71b and 71c are attached to the housing 10 by fasteners (bolts and nuts) 13 and 14, respectively. As a result, the louver 30 is attached to the housing 10.

  In this embodiment, when a plurality of louvers 30 are incorporated in the housing 10, first, as shown in FIG. 7B, the lowermost louver 30a is attached to both side surfaces of the housing 10 with fasteners (not shown). At the same time, it is fixed to the housing 10 by the support member piece 71c and the fastener 14 at a substantially central position in the longitudinal direction. Thereafter, as shown in FIG. 6, the louver 30 is fixed by the supporting member piece 71 at the substantially central position, and is also fixed at both side surfaces thereof.

  Finally, as shown in FIG. 7A, the uppermost louver 30b is attached to both side surfaces of the housing 10 with fasteners (not shown), and at the same time, at a substantially central position in the longitudinal direction, the support member piece 71b. And it is fixed to the housing 10 by the fastener 13.

  However, the method of assembling the daylighting louver unit 1 is not limited to that described above. For example, first, a louver assembly may be formed as an assembly of a plurality of louvers 30, and the assembly may be incorporated into the housing 10.

  FIG. 8 is a diagram illustrating a state in which the elastic member 80 attached to the louver 30 is in contact with the light diffusing member 50 in the region indicated by Y in FIG. 3. The light diffusing member 50 is provided between the rear edge (point I; FIG. 4) of the louver 30 and the second surface 12 of the housing 10. The elastic member 80 attached to the rear edge of the louver 30 contacts the light diffusing member 50 and urges the light diffusing member 50 toward the second surface 12.

  In the present embodiment, the elastic member 80 is made of a cylindrical elastic material (such as rubber) extending in the longitudinal direction of the louver 30, but the shape and material are not particularly limited. Although the position (louver) where the elastic member 80 is provided is not particularly limited, it is generally provided at a position where it is difficult to enter the field of view when viewed from the inside R of the building 100.

  As shown in FIG. 2, the light diffusing member 50 is an aggregate of a plurality of transparent rod-like members 51, and each rod-like member 51 has a circular cross section (for example, a diameter of 10 mm), and the longitudinal direction of the louver 30 Extending substantially vertically. A plurality of rod-like members 51 are arranged adjacent to each other in the longitudinal direction of the louver 30. Each rod-like member 51 is made of a transparent acrylic resin or the like, but the material is not particularly limited as long as it can transmit light.

  The rod-shaped member 51 constituting the light diffusing member 50 has a length of about 700 mm in the height direction of the housing, and tends to bend. However, in the present embodiment, the elastic member 80 contacts the light diffusing member 50 and urges the light diffusing member 50 toward the second surface 12, so that the light diffusing member 50 is prevented from bending.

  FIG. 9 is a diagram showing a visual field control film 90 attached to glass that is a transparent member on the first surface of the casing 10. The field-of-view control film 90 is affixed to the outside of the glass that is the transparent member of the first surface 11 and is composed of a transparent resin film such as polyester, but the material is not particularly limited. The transmittance of the visual field control film 90 is set to 86 to 88%, for example, but is not particularly limited.

  FIG. 10 is a diagram illustrating a function of preventing light from being emitted from the louver 30 to an outside passerby by the visual field control film 90. The visual field control film 90 has a function of controlling the visual field at a specific viewing angle viewed from a specific person. Due to this action of the visual field control film 90, the louver 30 cannot be viewed from the passerby within the range specified by the 55 ° angle in FIG. That is, the inside of the building 100 in the range where the visual field control film 90 is affixed becomes opaque, and the louver 30 becomes invisible to passers-by. Since the light reflected from the louver 30 to the outside of the building does not reach the passerby, the situation where the reflected light from the louver 30 hits the passerby and the passerby feels dazzled is prevented.

  FIG. 11 is a graph showing the effect of the daylighting louver unit 1 of the present embodiment. The horizontal axis is the distance (m) from the window surface (wall) inside the building, and the horizontal axis is the illuminance (lux). From this graph, it is understood that by using the daylighting louver unit 1 of this embodiment, it is possible to introduce a more stable light amount into the interior of the building than when the blinds in a conventional office building are fully opened. The

  The daylighting louver unit 1 according to the embodiment is merely an embodiment. For example, the louver support member 70 may be configured not by the plurality of support member pieces 71 but by an integral support member to prevent the louver 30 from being bent. The elastic member 80 may be triangular or rectangular. The visual field control film 90 is not necessarily provided on the entire first surface 11.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  The daylighting louver unit of the present disclosure has improved practicality when introduced into a building, and greatly contributes to the development of a building using natural light.

DESCRIPTION OF SYMBOLS 1 Daylighting louver unit 10 Housing 11 1st surface 12 2nd surface 30 Louver 50 Light-diffusion member 51 Bar-shaped member 70 Louver support member 71, 71a, 71b, 71c Support member piece 80 Elastic member 90 View control film 100 Building NL Natural light

Claims (7)

A lighting louver unit that can be placed on the wall of a building and introduces external natural light into the building,
A first surface through which natural light enters and a second surface facing the first surface, wherein at least a part of the first surface and at least a part of the second surface are configured by a transparent member; The body,
A plurality of louvers that are stored at a predetermined interval inside the housing and supply natural light introduced from the first surface to the second surface side;
A louver support member provided to prevent bending of the louver at a predetermined position in the longitudinal direction of each louver within the housing ;
A transparent light diffusing member is provided between the louver and the second surface,
A daylighting louver unit in which an elastic member disposed on the louver contacts the light diffusing member and urges the light diffusing member toward the second surface . The daylighting louver unit according to claim 1,
The plurality of louvers are disposed inside the housing so as to extend substantially parallel to each other along the longitudinal direction,
The louver support member is a daylighting louver unit provided at a substantially central position in the longitudinal direction of the louver. The daylighting louver unit according to claim 2,
The louver support member is a daylighting louver unit including a plurality of support member pieces arranged between two louvers or between a louver and a housing. The daylighting louver unit according to claim 3,
At least some of the plurality of support member pieces are
A main body having two joint surfaces that match the two surfaces of the louver;
A daylighting louver unit comprising a rod-like connection member extending from the main body and inserted into a hole formed in the louver and other support member pieces. The daylighting louver unit according to claim 1 ,
The daylighting louver unit, wherein the elastic member is made of a cylindrical elastic material that is attached to a rear edge of the louver and extends in the longitudinal direction of the louver. The daylighting louver unit according to claim 5 ,
The light diffusing member is an aggregate of a plurality of rod-shaped members,
A daylighting louver unit in which each bar-shaped member extends in a direction substantially perpendicular to the longitudinal direction of the louver, and a plurality of bar-shaped members are arranged adjacent to each other in the longitudinal direction of the louver. The daylighting louver unit according to any one of claims 1 to 6 ,
A daylighting louver unit in which a visual field control film is attached to the transparent member on the first surface.

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