JP5705691B2 - Daylight lens sheet - Google Patents

Description

  The present invention relates to a daylighting lens sheet installed on windows of various buildings and the like.

  In recent years, in the construction and construction industries, lighting facilities that can create a comfortable environment by guiding natural light such as sunlight into a building space and realize energy saving have attracted attention. Although this kind of lighting equipment is not shown, for example, a plurality of individual controllers that adjust or adjust the angle of the blades of the blinds based on input values from various sensors, and a central control system that controls the plurality of individual controllers (Refer to Patent Document 1).

JP 2008-269831 A

  The conventional daylighting equipment is configured as described above, requiring dedicated equipment that can handle natural light irradiation time and solar radiation, improving design flexibility, simplifying the configuration, and reducing costs. There is a problem that cannot be achieved. Moreover, since the lighting facility itself consumes electric power, there is a limit to realizing energy saving.

  The present invention has been made in view of the above, and it is possible to simplify the configuration and reduce the cost by omitting the dedicated equipment corresponding to the irradiation time and irradiation amount of natural light, and to improve the degree of freedom of design. The purpose is to provide a daylighting lens sheet that can be expected to improve energy saving.

In the present invention, in order to solve the above-mentioned problems, a light-transmitting sheet is attached to a window of a building , natural light is incident on the incident surface of the sheet, and the incident natural light is introduced into the building from the exit surface of the sheet. Which emits light,
On the incident surface of the sheet, a plurality of curved portions that exhibit a lens function are continuously arranged in a line, and the curved portions are substantially semi-elliptical in cross section,
A plurality of convex portions opposed to the plurality of curved portions are formed in a line at a predetermined interval on the emission surface of the sheet, and are opposed to the boundary between the adjacent curved portions between the adjacent convex portions. A flat surface is defined, and the convex portion is formed into a tapered trapezoidal shape with a narrower width than the width of the curved portion so that natural light can be emitted from the flat tip surface.
Leakage prevention processing for natural light is performed on the peripheral surface of the sheet, the surface of the curved portion, the end surface connected to the peripheral surface of the curved portion of the sheet, and the flat surface between the adjacent convex portions. It is said.

The sheet can be formed of phenyl silicone rubber .
Moreover, natural light can be emitted from the other inclined surface by performing leakage prevention processing for natural light on one inclined surface of the pair of inclined surfaces of each convex portion and processing the other inclined surface. .
Furthermore, the corners on the front end surface of the convex portion can be made angular without being rounded and chamfered.

Here, the building windows in the claims include at least houses, buildings, public facilities, commercial facilities, hospital windows, skylights, and the like. The sheet can be formed of, for example, a predetermined synthetic resin, rubber, elastomer or the like. The curved portion is formed in a substantially semi-elliptical cross section, and the semi-elliptical cross section includes a semi-elliptical cross section, a semicircular shape, a part of a circle, or a shape similar to these. Further, when the daylighting lens sheet according to the present invention is manufactured, it is preferable that the mold is filled with a molding material from the viewpoint of preventing leakage of natural light by mirror surface treatment or the like.

  According to the present invention, in order to create a comfortable environment or to save energy, it is only necessary to wait for natural light to fall on the daylighting lens sheet after mounting the daylighting lens sheet on the window. When natural light falls, the natural light enters the curved portion of the sheet incident surface, passes through the sheet, is emitted from at least the front end surface of the convex portion into the building, etc., and illuminates the wall surface in the building. Realize bright lighting.

According to the present invention, there is an effect that the dedicated equipment corresponding to the irradiation time and the irradiation amount of natural light can be omitted, and the configuration can be simplified and the cost can be reduced. In addition, the degree of freedom in design can be improved, and energy saving can be improved. In addition, since the plurality of curved portions are continuously arranged in a row so that no plane is generated between the adjacent curved portions, natural light can be refracted and advanced into the convex portion. Further, since the curved portion has a substantially semi-elliptical cross section, natural light can be received regardless of the natural light irradiation angle. In addition, since a flat surface is defined between the adjacent convex portions, the incidence of light rays from the building can be restricted. In addition, the division of the flat surface eliminates the need to continuously form a plurality of convex portions without gaps, and facilitates the operation when the daylighting lens sheet is molded. Furthermore, since the leakage prevention process for natural light is performed on the peripheral surface of the sheet, the surface of the curved portion, the end surface connected to the peripheral surface of the sheet of the curved portion, and the flat surface between the adjacent convex portions and the convex portions, respectively. It is possible to eliminate the possibility of incident natural light leaking outside.

According to the second aspect of the present invention, since the sheet is formed of phenyl silicone rubber and the refractive index is increased to reduce the critical angle, the daylighting lens sheet is thinned. Weather resistance can be improved .

Further, according to the invention described in claim 3, since natural light can be emitted upward from the other inclined surface of each convex portion, an expansion of the natural light irradiation range can be expected, and the illuminance inside the building And the brightness can be improved.

1 is an overall explanatory view schematically showing an embodiment of a daylighting lens sheet according to the present invention. It is explanatory drawing which shows typically the state which mounted the lighting lens sheet | seat on the outer surface of the window glass in embodiment of the lighting lens sheet | seat which concerns on this invention. It is explanatory drawing which shows typically the state which incorporated the lighting lens sheet in the window glass in embodiment of the lighting lens sheet which concerns on this invention. It is a perspective explanatory view showing typically an embodiment of a daylighting lens sheet concerning the present invention. It is a partial explanatory view showing typically relation with natural light in an embodiment of a daylighting lens sheet concerning the present invention. It is whole explanatory drawing which shows typically 2nd Embodiment of the daylighting lens sheet | seat which concerns on this invention. It is a partial explanatory view showing typically the 2nd embodiment of the daylighting lens sheet concerning the present invention. It is a partial explanatory view showing a 3rd embodiment of a lighting lens sheet concerning the present invention typically.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, the daylighting lens sheet in the present embodiment is transparent to the window glass 2 of the building 1. The sheet 10 is mounted, and a plurality of curved portions 20 are integrally formed on the incident surface of the sheet 10 on which natural light is incident, and a plurality of convex portions 30 are integrally arranged on the exit surface of the sheet 10. The plurality of curved portions 20 and the convex portions 30 are combined so that natural light is emitted from the front end surface 33 of each convex portion 30 to the room 5 of the building 1.

  As shown in FIGS. 1, 4 and 5, the sheet 10 is formed into a plane rectangle having a size equal to or smaller than the size of the window glass 2 using a predetermined material. Flexibility is imparted and it is attached to the inner surface of the window glass 2. Examples of the material of the sheet 10 include polycarbonate, acrylic resin, silicone rubber, and phenyl silicone rubber. Among these, phenylsilicone rubber, which has a high refractive index, makes the daylighting lens sheet itself thinner by reducing the critical angle (which makes it easier to confine natural light inside), and can be expected to have excellent heat resistance and weather resistance. Adoption is preferred.

  The peripheral surface 11 of the sheet 10 is subjected to leakage prevention processing in consideration of the possibility that natural light incident on the sheet 10 (see arrows in FIGS. 1 and 5) leaks to the outside. As this leakage prevention processing, for example, (1) a process in which the peripheral surface 11 of the sheet 10 is mirror-finished and reflected while confining natural light, and (2) the natural surface 11 is inclined by a predetermined angle to confine natural light. (3) Applying a pigment of any color (white pigment, etc.) to the peripheral surface 11 of the sheet 10 and curing it, (4) Transferring fine irregularities processed into the mold cavity Thus, a process of forming a lot of fine irregularities on the peripheral surface 11 of the sheet 10 to form a moth-eye structure, absorbing natural light, and restricting the leakage, and the like can be given.

  These natural light leakage prevention treatments are not particularly limited, and any treatment method may be used, but a mirror finish treatment that can be integrally formed at the time of forming the daylighting lens sheet and is easy to process is preferable.

  As shown in FIG. 1, the sheet 10 may be directly attached to the inner surface of the window glass 2, but can also be indirectly attached via a transparent adhesive sheet (not shown). Moreover, although it sticks directly on the outer surface of the window glass 2 according to a condition, it can also stick indirectly through a transparent adhesive sheet (refer FIG. 2). Further, in the case where the window glass 2 is a double glass as shown in FIG. 3, it may be directly interposed between the inner glass 3 and the outer glass 4 facing each other, but in this case, a transparent adhesive sheet is used. It may be indirectly attached.

  As shown in FIGS. 1, 4, and 5, the plurality of curved portions 20 are continuously formed in a row in the incident surface X direction of the sheet 10, and each curved portion 20 is arranged in the incident surface Y direction of the sheet 10. It is formed in a straight line and is directed outward from the building 1. It is preferable that there is no plane between the adjacent curved portions 20 and the curved portions 20 because the natural light is refracted and advanced into the convex portion 30. Each of the curved portions 20 bulges to have a substantially semi-elliptical cross section so that natural light can be received regardless of the natural light irradiation angle, and exhibits a lens function.

  The surface 21 curved in a semicircular cross section of the curved portion 20 and the end surface 22 connected to the peripheral surface 11 of the sheet 10 are subjected to leakage prevention processing in order to eliminate the possibility of incident natural light leaking to the outside. As the leakage prevention process, the above processes (1) to (4) are adopted, but the mirror finishing process which is easy to process is optimal.

  As shown in the figure, the plurality of convex portions 30 are arranged in a line at a predetermined interval in the direction of the emission surface X of the sheet 10, and are opposed to the plurality of curved portions 20. The sheet 10 is linearly extended in the exit surface Y direction. In the plurality of convex portions 30, a flat surface 31 in which it is difficult for light to enter from the indoor 5 side is defined between the adjacent convex portions 30 and the convex portions 30, and this flat surface 31 is subjected to leakage prevention processing (for example, , Mirror processing, etc.) and face the boundary 23 between the adjacent curved portions 20.

  Each convex portion 30 is formed in a tapered trapezoidal cross-sectional shape that is narrower than the width of the curved portion 20, and leaks to prevent the incident natural light from leaking to the pair of inclined surfaces 32 and 32A that are the peripheral surfaces. The prevention process (for example, mirror surface processing etc.) is performed respectively, and natural light is radiate | emitted from the flat front end surface 33 linearly.

  The height of the convex part 30 and the inclination angle of the inclined surfaces 32 and 32A are adjusted according to the size of the room 5 and the like. Further, the flat surface 31 between the convex portions 30 is formed wide or narrow in consideration of manufacturing convenience. Since the two corners 34 of the tip surface 33 of the convex part 30 are rounded and chamfered, natural light may leak in an unexpected direction.

  The manufacturing method of a lighting lens sheet is not specifically limited. However, in the case where the mirror surface treatment is performed on the surface other than the front end surface 33 of the daylighting lens sheet, the mirror surface processing can be easily performed on the surface other than the front end surface 33 of the daylighting lens sheet by transferring the processed mirror surface to the cavity of the mold. Therefore, a production method in which a molding material such as phenyl silicone rubber is used and injection molding is performed with a mold is desirable.

  In the above, when a comfortable environment is created in the room 5 of the building 1 with poor location conditions, or when it is desired to realize energy saving and cost saving, a plurality of daylighting lens sheets are attached to the window glass 2 of the building 1 to install a plurality of lighting lens sheets. It is only necessary to wait for natural light to fall on the daylighting lens sheet after the arrangement direction of the projections 30 is the vertical direction of the room 5 and the front end surface 33 of each projection 30 is directed to the inner wall surface 6 of the room 5. When natural light falls, the natural light enters the curved portion 20 of the incident surface of the sheet 10 as shown in FIG. 5, passes through the inner thickness direction of the sheet 10, and exits from the front end surface 33 of the convex portion 30 to the room 5. Then, the wall surface 6 of the room 5 is irradiated.

  At this time, natural light falling at a predetermined angle is efficiently condensed on the surface 21 of the bending portion 20 having a lens function. Further, some natural light is repeatedly reflected at the interface with the air layer, and is emitted only from the front end surface 33 of the convex portion 30 without being emitted from the flat surface 31 or the inclined surfaces 32 and 32A between the convex portions 30. . Natural light applied to the wall surface 6 of the room 5 is used as indirect light that is not dazzling, and illuminates the room 5 to contribute to a reduction in the amount of energy consumed for illumination.

  According to the above configuration, since a natural light daylighting system can be constructed simply by attaching a daylighting lens sheet to the window glass 2, dedicated equipment (for example, a sensor or timer, The light collecting prism, the mirror tracking device, etc.) can be omitted without fail, and the degree of freedom in system design can be greatly improved, the configuration can be simplified, and the cost can be reduced. In addition, since the daylighting lens sheet does not consume power, the lighting cost can be reduced, and the improvement of energy saving can be greatly expected.

  Further, if the material of the seat 10 is selected to give flexibility and bendability, the seat 10 can be bent into an arbitrary shape, so that workability, mountability, and interior of the room 5 can be improved. It becomes possible. Furthermore, if the sheet 10 is formed of phenyl silicone rubber or the like, the sheet 10 can be made thin and light in weight, so that the sheet 10 can be easily attached to the window glass 2.

Next, FIGS. 6 and 7 show a second embodiment of the present invention. In this case, the upper inclined surface 32 of the pair of upper and lower inclined surfaces 32 and 32A of each convex portion 30 is predetermined. Thus, natural light is emitted and scattered from the inclined surface 32 and the front end surface 33 processed by the convex portion 30, respectively.
Examples of the processing on the upper inclined surface 32 include processing for increasing the surface roughness, processing for forming a plurality of dots, processing for transflective printing, and the like.

  In the above, when natural light falls on the daylighting lens sheet, the natural light enters the curved portion 20 of the incident surface of the sheet 10, passes through the inner thickness direction of the sheet 10, and the inclined surface 32 and the front end surface 33 of the convex portion 30. Are respectively emitted to the room 5 and widely illuminate the wall surface 6 and the ceiling 7 of the room 5. The other parts are substantially the same as those in the above embodiment, and thus description thereof is omitted.

  Also in this embodiment, the same effect as the above embodiment can be expected, and since natural light is emitted obliquely upward from the inclined surface 32 above each convex portion 30, linear natural light is emitted with various light distributions. It is obvious that the illuminance in the room 5 can be improved by irradiating the upper part of the wall surface 6 and the ceiling 7 as well.

  Next, FIG. 8 shows a third embodiment of the present invention. In this case, predetermined processing is performed on the lower inclined surface 32 of the pair of upper and lower inclined surfaces 32 and 32 of each convex portion 30. The natural light is emitted from the inclined surface 32 and the tip surface 33 processed by the convex portion 30.

  Processing for the lower inclined surface 32A is not particularly limited. For example, a light-shielding reflecting surface is formed on the lower inclined surface 32A, and natural light from the upper inclined surface 32 is applied to the reflective inclined surface 32A. Examples of processing include reflection. The specific light-shielding reflective surface is not particularly limited, and examples thereof include a black and white layer that reflects natural light at the white portion and blocks natural light at the black portion, and a metal layer that reflects and blocks natural light. It is done. These can be formed by a printing method or a method such as laminating a plurality of base materials. The other parts are substantially the same as those in the above embodiment, and thus description thereof is omitted.

  In the present embodiment, the same effect as that of the above embodiment can be expected, and a part of the natural light incident on the inclined surface 32A below each convex portion 30 is reflected and the natural light is emitted obliquely upward. It is obvious that the interior 5 can be illuminated more brightly by irradiating the upper part of 6 and the ceiling 7 with natural light.

  In the above embodiment, an example in which a daylighting lens sheet is attached to the window glass 2 in the room 5 is shown, but the present invention is not limited to this. For example, a daylighting lens sheet may be attached to the skylight glass of the building 1. Further, a necessary number of secondary mirrors and tertiary mirrors that reflect natural light from the convex portion 30 or diffuse while suppressing glare may be attached to the wall surface 6 and the ceiling 7 of the room 5.

  Further, a plurality of daylighting lens sheets may be attached to the window glass 2 instead of one daylighting lens sheet. Furthermore, if the width of the convex portion 30 is equal to or smaller than the width of the curved portion 20 and natural light can be emitted appropriately, a plurality of convex portions 30 are continuously arranged in a row in the direction of the emission surface X of the sheet 10. And the flat surface 31 between the adjacent convex parts 30 may be abbreviate | omitted.

  The daylighting lens sheet according to the present invention can be used, for example, in the lighting field of buildings and transportation.

1 Building 2 Window glass (window)
5 Indoor 6 Wall surface 7 Ceiling 10 Sheet 11 Peripheral surface 20 Curved portion 21 Surface 23 Boundary 30 Convex portion 31 Flat surface 32 Inclined surface 32A Inclined surface 33 Tip surface 34 Corner

Claims (3)

A lighting lens sheet for attaching a light transmissive sheet to a building window , allowing natural light to enter the incident surface of the sheet, and emitting the incident natural light into the building from the exit surface of the sheet,
On the incident surface of the sheet, a plurality of curved portions that exhibit a lens function are continuously arranged in a line, and the curved portions are substantially semi-elliptical in cross section,
A plurality of convex portions opposed to the plurality of curved portions are formed in a line at a predetermined interval on the emission surface of the sheet, and are opposed to the boundary between the adjacent curved portions between the adjacent convex portions. A flat surface is defined, and the convex portion is formed into a tapered trapezoidal shape with a narrower width than the width of the curved portion so that natural light can be emitted from the flat tip surface.
Leakage prevention processing for natural light is performed on the peripheral surface of the sheet, the surface of the curved portion, the end surface connected to the peripheral surface of the curved portion of the sheet, and the flat surface between the adjacent convex portions. A daylighting lens sheet. The daylighting lens sheet according to claim 1, wherein the sheet is formed of phenyl silicone rubber. The natural light is emitted from the other inclined surface by subjecting one of the inclined surfaces of each convex portion to a natural light leakage prevention process and processing the other inclined surface. The daylighting lens sheet according to 1 or 2.

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