Daylighting device

Abstract

To suppress glare and ensure brightness in an interior space.SOLUTION: A daylighting device for introducing external light into the interior of a building through an opening BO provided in the building, the device comprising a light-transmitting resin-molded light collection section having an incident surface 30e located on an exterior side and inclined upward, an emission surface 30f located on an interior side and inclined upward, and an internal reflection surface 30d configured to reflect light incident from the incident surface 30e toward the emission surface 30f.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present invention relates to a daylighting device that introduces external light into the interior of a building. [Background technology]

[0002] One such lighting device is one that has a plurality of reflectors arranged vertically in parallel at an opening in a building to reflect external light and let it into the room (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-8960 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned lighting device, a light-diffusing reflector with an upper surface that diffuses light is used as part of the reflector to prevent glare. However, in places where a specular reflector is used as the reflector, the directional reflected light is irradiated directly into the room, making it difficult to reduce glare.

[0005] In view of the above-mentioned circumstances, an object of the present invention is to provide a lighting device that can reduce glare and brighten a room. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the lighting device of the present invention is a lighting device for introducing external light into the interior of a building through an opening provided in the building, and is characterized in that it has a lighting section molded from a translucent resin and provided with an incident surface on the exterior side that is inclined upward, an exit surface on the interior side that is inclined upward, and an internal reflection surface that reflects light incident from the incident surface toward the exit surface. [Effects of the Invention]

[0007] According to the present invention, external light is emitted into the room after passing through the interior of the resin that constitutes the daylighting section, making it possible to reduce glare and brighten the room. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view conceptually showing a building to which a daylighting device according to an embodiment of the present invention is applied. [Figure 2] FIG. 2 is a cross-sectional view taken along line XX in FIG. [Figure 3] 2 is a cross-sectional view taken along line YY in FIG. 1. [Figure 4] 2 is a front view of the lighting device shown in FIG. 1 as seen from the outdoor side. [Figure 5] FIG. 2 is a side view of the lighting device shown in FIG. [Figure 6] FIG. 2 is a vertical cross-sectional view of the lighting device shown in FIG. [Figure 7] FIG. 2 is a perspective view of the lighting device shown in FIG. 1 as seen from the outdoor side. [Figure 8] FIG. 2 is a perspective view of the lighting device shown in FIG. 1 as seen from the indoor side. [Figure 9] 2 is a perspective view of a light-collecting section and a light-adjusting section of the lighting device shown in FIG. 1, viewed from the outside of the room. FIG. [Figure 10] 2 is a perspective view of a light-collecting section and a light-adjusting section of the lighting device shown in FIG. 1, as viewed from the indoor side. [Figure 11] 2 is a perspective view of the light control unit of the lighting device shown in FIG. 1 as seen from the indoor side. [Figure 12] 12 is a perspective view and a partially enlarged view of the first light control layer of the light control unit shown in FIG. 11 as seen from the indoor side. [Figure 13] 12 is a perspective view and a partially enlarged view of the second light control layer of the light control unit shown in FIG. 11 as seen from the indoor side. [Figure 14] 2A and 2B are views of the light-collecting portion of the light-collecting device shown in FIG. 1 as seen from the outside of the room, with (a) being a perspective view and (b) being an enlarged cross-sectional view of the main portion. [Figure 15]2 is a perspective view of the lighting section of the lighting device shown in FIG. 1, viewed from the indoor side. [Figure 16] FIG. 15 is a vertical cross-sectional view of the daylighting section shown in FIG. [Figure 17] 2A and 2B are schematic diagrams showing the lighting section of the lighting device shown in FIG. 1, where FIG. 2A is a side view of a single lighting section, and FIG. 2B is a side view of a state in which multiple lighting sections are connected together. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the lighting device according to the present invention will be described in detail below with reference to the accompanying drawings. 1 to 3 show the main parts of a building to which a daylighting device according to an embodiment of the present invention is applied. The daylighting device exemplified here is attached to an opening BO in a building such as a house, at a portion on the outside of a fixture W, and includes a device frame 10, a light control unit 20, and a daylighting unit 30, as shown in FIGS.

[0010] The device frame 10 is constructed by assembling an upper frame 11, a lower frame 12, and left and right vertical frames 13 all around. The upper frame 11, lower frame 12, and vertical frames 13 that make up the device frame 10 are each formed from a metal such as an aluminum alloy, and are constructed so that the entire longitudinal length has a substantially uniform cross-sectional shape. In the illustrated example, the upper frame 11, lower frame 12, and vertical frames 13 are flat and extend in the indoor / outdoor direction.

[0011] The dimming unit 20 adjusts the amount of external light, such as sunlight, entering the room from the outside and is located in the upper half of the device frame 10. In this embodiment, as shown in FIG. 11 , the dimming unit 20 is configured with a first dimming layer 21 on the outdoor side and a second dimming layer 22 on the indoor side. The first dimming layer 21 and the second dimming layer 22 are each formed using a 3D (three-dimensional) printer using a colorless, translucent resin. The 3D printer used is, for example, a type classified as a MEX (Material Extrusion) method, such as a Fused Deposition Modeling (FDM) method or a Fused Granular Fabrication (FGF) method. That is, a desired shape is obtained by extruding molten resin from a nozzle while moving the nozzle left and right, and sequentially layering the resin upward.

[0012] The first photochromic layer 21 has a rectangular outer shape and a curved shape that protrudes toward the outside of the room so that it can be placed above the device frame 10. As shown in FIG. 12, the first photochromic layer 21 has a bottom wall 23 extending from its lower edge toward the room, and side walls 24 extending from both side edges toward the room. The bottom wall 23 has an opening 23a in the portion facing the outside of the room. The first photochromic layer 21 was molded using the 3D printer described above, by sequentially stacking resin upward while moving the nozzle left and right. Then, as shown in the enlarged view in FIG. 12, the first photochromic layer 21 has multiple protrusions 21a formed by the molding marks, arranged parallel to each other above and below. The protrusions 21a each protrude in a curved shape like the surface of a cylinder, with grooves 21b interposed between them. The pitch of the protrusions 21a may be uniform or may vary locally. That is, by changing the thickness of the laminated resin, it is possible to change the pitch of the protruding stripes 21a.

[0013] The second dimming layer 22 has a rectangular outer shape large enough to be placed between the sidewalls 24 of the first dimming layer 21. The second dimming layer 22 shown in FIG. 13 is configured with five flat dimming plate sections. The topmost first dimming plate section 22a extends almost horizontally along the indoor-outdoor direction. The second dimming plate section 22b extends vertically downward from the edge of the first dimming plate section 22a located on the outdoor side. The third dimming plate section 22c is inclined downward from the lower edge of the second dimming plate section 22b so as to gradually face indoors. The fourth dimming plate section 22d extends vertically downward from the lower edge of the third dimming plate section 22c. The fifth dimming plate section 22e is inclined downward from the lower edge of the fourth dimming plate section 22d so as to gradually face outdoor sides. The second photochromic layer 22 was formed using the above-mentioned 3D printer by sequentially stacking resin upward while moving the nozzle left and right. Then, as shown in the enlarged view in FIG. 13 , the second photochromic layer 22 was provided with a plurality of ridges 22f formed by the molding marks, arranged side by side. Like the ridges 21a of the first photochromic layer 21, the ridges 22f each protrude in a curved, cylindrical shape, with grooves 22g interposed between them. The pitch of the ridges 22f may be uniform or may vary locally. That is, the pitch of the ridges 22f can be varied by varying the thickness of the laminated resin. The pitch of the ridges 22f may be the same as or different from the pitch of the ridges 21a.

[0014] As shown in Figures 4 to 10, the above-mentioned dimming unit 20 is connected to each other with both side edge portions of the second dimming layer 22 respectively adjacent to the side wall portion 24 of the first dimming layer 21, and is attached to the upper part of the device frame 10 with the first dimming layer 21 protruding to the outside of the room and the first dimming plate portion 22a abutting the upper frame 11. As shown in Figure 6, a gap is secured between the first dimming layer 21 and the second dimming layer 22 in the indoor / outdoor direction. The second dimming layer 22 is also arranged in a portion closer to the indoor side than the indoor-side edge portion of the opening 23a provided in the bottom wall portion 23 of the first dimming layer 21.

[0015] The daylighting section 30 is provided in the lower half of the device frame 10 to allow external light, such as sunlight, to enter the room. In this embodiment, multiple daylighting sections 30 are arranged vertically side by side to cover the lower half of the device frame 10. Like the dimming section 20, each daylighting section 30 is molded using a 3D printer from a colorless, translucent resin. As with the first and second dimming layers 21 and 22, the 3D printer used is one classified as a MEX method, such as the FDM method or FGF method. As shown in Figures 14 to 17, the daylighting section 30 includes a reflector 30a, an incident body 30b, and an exit body 30c. The reflector 30a has a bottom surface 30d that is substantially flat along the indoor / outdoor direction. The incident body 30b is gradually inclined upward from the portion of the reflector 30a located outside the room toward the outside. The incident surface 30e of the incident body 30b, which is located outside the room, is approximately perpendicular to the extension direction of the incident body 30b and is inclined upward. The exit body 30c is inclined so that it gradually slopes upward from the portion of the reflector 30a located inside the room toward the room. The exit surface 30f of the exit body 30c, which is located inside the room, is approximately perpendicular to the extension direction of the exit body 30c and is inclined upward. As shown in Figures 14 and 15, each daylighting section 30 used in this embodiment is curved so that the central portion along the left and right sides is convex toward the outside of the room.

[0016] The multiple light collecting sections 30 are integrally formed by alternately connecting the edges of the incident bodies 30b and the edges of the exit bodies 30c. In this embodiment, as shown in FIG. 16 , the top light collecting section 30 and the second light collecting section 30 are connected via a connecting section 30g at the edges of their incident bodies 30b. The second light collecting section 30 and the third light collecting section 30 are connected via a connecting section 30g at the edges of their exit bodies 30c. The third light collecting section 30 and the fourth light collecting section 30 are connected via a connecting section 30g at the edges of their incident bodies 30b. The multiple light collecting sections 30 are connected in the same manner to form a continuous light collecting structure 130. The connection state of the light collecting sections 30 may be reversed from that shown in the figure.

[0017] In the lighting structure 130 of this embodiment, as shown in FIG. 17(b), multiple light collecting sections 30 are provided so that the inclination angles θ (θ1 to θ3) of the incident bodies 30b from the horizontal plane are different from one another. More specifically, the multiple light collecting sections 30 are configured so that the inclination angles of the incident bodies 30b located lower are smaller than the inclination angles of the incident bodies located upper (θ1 > θ2 > θ3). In other words, the multiple light collecting sections 30 are configured so that the inclination angles α (α1 to α3) of the incident surfaces 30e from the vertical plane are larger for those located higher than those located lower (α1 > α2 > α3). The inclination angles θ (θ1 to θ3) of the exit bodies 30c from the reflector 30a are the same as the inclination angles θ (θ1 to θ3) of the incident bodies 30b from the reflector 30a. That is, each daylighting section 30 is configured so that the inclination angle β (β1 to β3) of the emission surface 30f from the vertical plane is the same as the inclination angle α (α1 to α3) of the incidence surface 30e from the vertical plane.

[0018] The lighting structure 130, which is a series of multiple lighting sections 30, was molded using the above-mentioned 3D printer by sequentially stacking resin upward while moving the nozzle left and right. Then, as shown in the enlarged view of Figure 14(b), the lighting structure 130 is installed so that curved convex sections 30h formed by the molding marks are aligned side by side on the light-emitting surface 30f. The above-mentioned lighting structure 130 is attached to the lower half of the device frame 10, with both ends of each lighting section 30 connected to the vertical frame 13.

[0019] In the lighting device configured as described above, external light incident on the dimming unit 20 is diffused in mutually perpendicular directions by the protrusions 21a, 22f provided on the first dimming layer 21 and the second dimming layer 22 while passing through them. Therefore, even under conditions of strong sunlight, the external light is emitted into the room after being diffused in two perpendicular directions, making it possible to brighten the room while suppressing glare.

[0020] Meanwhile, in the daylighting section 30, external light incident through the incident surface 30e is reflected by the bottom surface 30d of the reflector 30a as an internal reflection surface and is introduced into the room through the exit surface 30f. As described above, the daylighting device of this embodiment has multiple incident surfaces 30e with different inclination angles α from the vertical. This allows external light to be introduced into the room throughout the year without any adjustments. That is, in summer, when the solar altitude is relatively high, external light incident through the upper daylighting section 30 with a large inclination angle α of the incident surface 30e (inclination angle α1 in the example of FIG. 17) is efficiently introduced into the room. On the other hand, in winter, when the solar altitude is relatively low, external light passing through the lower daylighting section 30 with a small inclination angle α of the incident surface 30e (inclination angle α3 in the example of FIG. 17) is efficiently introduced into the room. As a result, external light can be efficiently introduced into the room throughout the year, even when the solar altitude varies.

[0021] Furthermore, regardless of which light passes through the daylighting section 30, it passes through the resin, resulting in attenuated light being emitted into the room, making it possible to brighten the room while reducing glare. In addition, because convex portions 30h are provided on the emission surface 30f due to molding using a 3D printer, when the light from the daylighting section 30 is emitted from the emission surface 30f, it passes through the convex portions 30h and is diffused, further reducing glare. Furthermore, because the portion facing the outside of the door and window W is covered by the resin that makes up the daylighting device, it is possible to improve the thermal insulation of the room.

[0022] In the above-described embodiment, a lighting device including a light control unit 20 is illustrated, but the light control unit 20 is not necessarily required. In the above-described embodiment, the light control unit 20 is provided above the light collecting unit 30. However, the light control unit 20 may be provided below the light collecting unit 30. In addition, the light control unit 20 includes a first light control layer 21 and a second light control layer 22, but the present invention is not limited to this. Furthermore, since the light control unit 20 is formed using a 3D printer, the protrusions 21a and 22f can be easily formed using the molding marks. However, the light control unit 20 formed by other methods may also be used. Furthermore, although a metal device frame 10 is provided around the device, the device frame 10 is not necessarily required.

[0023] Furthermore, while the above-described embodiment illustrates a light control device having multiple light collecting units 30, only one light collecting unit 30 is required. In the above-described embodiment, when multiple light collecting units 30 are provided, the inclination angles α of the incident surfaces 30e from the vertical plane are different from each other. However, the multiple light collecting units 30 may be configured to have the same inclination angle α. Furthermore, although the multiple light collecting units 30 are integrated by alternately connecting the outdoor edge and the indoor edge, this is not necessarily limited to this. Furthermore, since the light collecting units 30 are constructed using a 3D printer, the molding marks can easily form the convex portions 30h on the exit surface 30f, but light collecting units 30 formed by other methods may also be used.

[0024] Furthermore, although light collecting section 30 is formed from a colorless resin that has light transmissivity, it does not have to be colorless as long as it has light transmissivity, and colored resin can also be used. Furthermore, light collecting section 30 does not necessarily have to have reflector 30a, incident body 30b, and exit body 30c; it is sufficient to configure light collecting section 30 by providing, for example, an internal reflective surface 30d, incident surface 30e, and exit surface 30f in a rectangular parallelepiped.

[0025] As described above, the lighting device of the present invention is a lighting device for introducing external light into the interior of a building through an opening provided in the building, and is characterized by having a lighting section molded from a translucent resin and provided with an incident surface on the exterior side that is inclined upward, an exit surface on the interior side that is also inclined upward, and an internal reflective surface that reflects light incident from the incident surface toward the exit surface. According to this invention, external light is emitted into the room after passing through the interior of the resin that constitutes the daylighting section, making it possible to reduce glare and brighten the room.

[0026] Furthermore, the present invention is characterized in that in the above-mentioned lighting device, a plurality of the lighting sections are arranged in a row above and below. According to this invention, it is possible to take in outside light over a wide area of ​​the room through the plurality of daylighting sections arranged side by side.

[0027] The present invention is also characterized in that, in the above-mentioned lighting device, the inclination angle from the vertical plane to the incident surface in the multiple lighting sections includes a portion in which the angle of inclination of the upper section is larger than that of the lower section. According to this invention, external light at different solar altitudes can be efficiently taken into the room without the need for adjustment work.

[0028] Furthermore, in the above-described lighting device of the present invention, the plurality of lighting sections are connected at their outdoor edge portions and indoor edge portions alternately. According to this invention, a plurality of light-collecting sections can be treated as a series of light-collecting structures.

[0029] Furthermore, the present invention is characterized in that in the above-mentioned lighting device, the light exit surface is provided with a convex portion for diffusion. According to this invention, it is possible to diffuse external light emitted from the daylighting section.

[0030] Furthermore, the present invention is characterized in that in the above-mentioned lighting device, the lighting section is a molded body formed by a 3D printer. According to this invention, the daylighting portion can be easily formed.

[0031] The present invention is also characterized in that the above-mentioned lighting device has a dimming unit that diffuses external light and allows it to enter the room, and the dimming unit and the lighting unit are arranged side by side one above the other. According to this invention, it is possible to take in diffused external light into the room through the light control section.

[0032] The present invention is also characterized in that, in the above-mentioned lighting device, the dimming section has two dimming layers on which a plurality of protrusions are arranged side by side, and the two dimming layers are stacked on top of each other with the protrusions extending in directions perpendicular to each other. According to this invention, it is possible to take in diffused external light into a room in two perpendicular directions.

[0033] Furthermore, the present invention is characterized in that, in the above-mentioned lighting device, the dimming section is a molded body formed by a 3D printer. According to this invention, the light control section can be easily formed. [Explanation of symbols]

[0034] 20 light control section, 21 first light control layer, 21a, 22f protrusion section, 22 second light control layer, 22a first light control board section, 22b second light control board section, 22c third light control board section, 22d fourth light control board section, 22e fifth light control board section, 30 lighting section, 30a reflector, 30b incident body, 30c Emitter, 30d bottom surface (internal reflection surface), 30e entrance surface, 30f exit surface, 30g connection section, 30h convex section, 130 lighting structure, BO opening, α tilt angle

Claims

1. A lighting device for introducing external light into a building through an opening provided in the building, A lighting device characterized by having a lighting section molded from a translucent resin, the lighting section having an incident surface on the outdoor side that is inclined upward, an exit surface on the indoor side that is inclined upward, and an internal reflection surface that reflects light that has entered from the incident surface toward the exit surface.

2. The light collecting device according to claim 1, wherein a plurality of the light collecting sections are arranged vertically in parallel.

3. The light-collecting device according to claim 2, characterized in that the inclination angle from the vertical plane to the incident surface in the plurality of light-collecting sections includes a portion in which the upper ones are larger than the lower ones.

4. The lighting device according to claim 2, wherein the plurality of lighting sections are connected at their outdoor edge portions and indoor edge portions alternately.

5. The light collecting device according to claim 1, wherein the light exit surface is provided with a convex portion for diffusing light.

6. The lighting device according to claim 1 , wherein the lighting portion is a molded body formed by a 3D printer.

7. 2. The light-collecting device according to claim 1, further comprising a light-adjusting unit that diffuses external light and allows it to enter the room, the light-adjusting unit and the light-collecting unit being arranged side by side one above the other.

8. The light-gathering device of claim 7, characterized in that the dimming section has two dimming layers on which a plurality of protrusions are arranged side by side, and the two dimming layers are stacked on top of each other with the protrusions extending in directions perpendicular to each other.

9. The light collecting device according to claim 7, wherein the light adjusting section is a molded body formed by a 3D printer.

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