Structure equipped with solar panels

Abstract

To prevent a photovoltaic power generation sheet from falling or scattering by reducing mounting holes formed in a structure as much as possible.SOLUTION: A structure 10 equipped with photovoltaic power generation sheets 16 comprises: the two or more photovoltaic power generation sheets 16 pasted side by side in a non-horizontal plane 14 or a horizontal plane that is a vertical surface or a sloping surface at an outer surface 12; a pair of spaced fixtures 26 fixed to the outer surface 12 of the structure 10; a main wire 24 extending from the outer surface 12 of the structure 10 at a gap and passed across the pair of fixtures 26 to be tensioned; two or more sub-wires connected to the main wire 24 and connected to a corresponding one of two or more photovoltaic power generation sheets 16; and two or more electrical cables bundled into the main wire 24 and extending along the main wire 24, and each electrically connected to a corresponding one of two or more photovoltaic sheets 16.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a structure equipped with a photovoltaic sheet. [Background technology]

[0002] Solar cells are increasingly being installed on roofs of houses (Patent Documents 1 and 2). Flexible solar power generation sheets are also known (Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-177274 [Patent Document 2] Special Publication No. 2016-525634 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-140762 Summary of the Invention [Problem to be solved by the invention]

[0004] When installing a photovoltaic sheet on a structure, as shown in Patent Document 3, the sheet is placed in a strong frame and the frame is fixed to the structure with bolts or the like. With this installation method, when attaching multiple photovoltaic sheets, multiple frames must be fixed, so multiple mounting holes must be drilled in the wall of the structure. If mounting holes are not provided, the photovoltaic sheet must be glued, but in this case, there is a risk that the photovoltaic sheet will peel off and fly away due to strong winds or deterioration of the adhesive.

[0005] The present invention aims to prevent a photovoltaic sheet from falling or scattering by reducing the number of mounting holes formed on the attachment surface of a structure as much as possible. [Means for solving the problem]

[0006] (1) A structure equipped with a photovoltaic sheet according to the present invention is characterized by having two or more photovoltaic sheets attached side by side to a vertical or inclined non-horizontal or horizontal surface on the outer surface of the structure; a pair of spaced apart mounting fixtures fixed to the outer surface of the structure; a main wire extending from the outer surface of the structure at a gap and hung between the pair of mounting fixtures so as to apply tension; two or more sub-wires connected to the main wire and each connected to a corresponding one of the two or more photovoltaic sheets; and two or more electrical cables bundled with the main wire, extending along the main wire, and each electrically connected to a corresponding one of the two or more photovoltaic sheets.

[0007] (2) In the structure equipped with the photovoltaic sheet described in (1), the pair of mounting fixtures may be located at a pair of positions at different heights.

[0008] (3) In the structure provided with the photovoltaic sheet described in (2), the main wire may extend vertically.

[0009] (4) In a structure equipped with a photovoltaic sheet as described in (2) or (3), the two or more photovoltaic sheets may comprise a first group of photovoltaic sheets arranged one above the other and a second group of photovoltaic sheets arranged one above the other, and the main wire may be located horizontally between the first group of photovoltaic sheets and the second group of photovoltaic sheets.

[0010] (5) In a structure equipped with the photovoltaic sheet described in (4), each of the two or more photovoltaic sheets may have a rectangular planar shape and be arranged so that the long sides of the rectangle are horizontal.

[0011] (6) In a structure equipped with the solar photovoltaic sheet described in (1), the pair of mounting fixtures may be located at a pair of positions at the same height, and the main wire may extend horizontally.

[0012] (7) In the structure provided with the photovoltaic sheet described in (6), the two or more photovoltaic sheets may be arranged side by side in the horizontal direction.

[0013] (8) In a structure equipped with a photovoltaic sheet as described in (7), the main wire may be located farther away from the structure than the two or more photovoltaic sheets.

[0014] (9) In a structure equipped with the photovoltaic sheet described in (8), each of the two or more photovoltaic sheets may have a rectangular planar shape and be arranged so that the short sides of the rectangle are horizontal.

[0015] (10) In a structure equipped with a photovoltaic sheet described in any one of (1) to (9), the structure may further be characterized by having a spacer interposed between the main wire and the outer surface and in contact with the outer surface without being fixed thereto.

[0016] (11) In the structure provided with the photovoltaic sheet according to any one of (1) to (10), the main wire may be a wire cable.

[0017] (12) In a structure equipped with the photovoltaic sheet according to any one of (1) to (11), the tension of the main wire may be adjustable.

[0018] (13) A structure comprising a photovoltaic sheet according to any one of (1) to (12) may further comprise an adhesive layer interposed between each of the two or more photovoltaic sheets and the outer surface of the structure.

[0019] (14) In a structure provided with the photovoltaic sheet according to any one of (1) to (13), the outer surface of the structure may be made of a cement-based material.

[0020] According to the present invention, the main wire and the sub-wire can prevent the photovoltaic sheet from falling or scattering. Because the main wire is stretched across a pair of mounting fixtures, the number of mounting holes that need to be formed in the structure can be reduced. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic front view of a structure including a photovoltaic sheet according to a first embodiment. [Figure 2] FIG. 1 is a partial vertical cross-sectional view of a structure equipped with a photovoltaic sheet. [Figure 3] FIG. 1 is a partial cross-sectional view of a structure equipped with a photovoltaic sheet. [Figure 4] FIG. 2 is a partially enlarged view of the structure shown in FIG. [Figure 5] 10A and 10B are diagrams illustrating the connection between the main wire and the sub-wire. [Figure 6] FIG. 10 is a diagram illustrating a modified example of the first embodiment. [Figure 7] FIG. 10 is a schematic front view of a structure including a photovoltaic sheet according to a second embodiment. [Figure 8] FIG. 10 is a schematic front view of a structure including a photovoltaic sheet according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Elements with the same reference numerals in all the drawings have the same or equivalent functions, and their repeated explanation will be omitted. Note that the size of the figures does not necessarily correspond to the magnification.

[0023] [First embodiment] FIG. 1 is a schematic front view of a structure equipped with a photovoltaic sheet according to a first embodiment. The structure 10 is a building (e.g., an office building), but other possible applications include public facilities such as highway sidewalls, railway track sidewalls, train stations, revetments, power plants, waste disposal plants, and water purification plants. The exterior surface 12 of the structure 10 is made of a cement-based material. The structure 10 has a non-horizontal surface 14 on the exterior surface 12, which is a vertical or inclined surface. The non-horizontal surface 14 may be flat or curved. The exterior surface 12 is the surface of a wall, but also includes the surface of a roof. Note that the exterior surface 12 is intended to be a sunny south-facing wall. However, office buildings and factories often have small window areas to reduce air conditioning loads, and these buildings have large wall areas. A photovoltaic sheet 16 is attached to the wall of this structure 10.

[0024] Fig. 2 is a partial longitudinal cross-sectional view of the structure 10 provided with the photovoltaic sheet 16. Fig. 3 is a partial transverse cross-sectional view of the structure 10 provided with the photovoltaic sheet 16. Fig. 4 is a partial enlarged view of the structure shown in Fig. 1.

[0025] The photovoltaic sheet 16 has a rectangular planar shape. The photovoltaic sheet 16 is thin (approximately 2 mm) and lightweight (approximately 1.8 kg), and can be attached later without structural calculations. The photovoltaic sheet 16 is flexible. The photovoltaic sheet 16 is a thin-film photovoltaic sheet such as a CIGS-based or perovskite-based material. CIGS-based materials include copper (Cu), indium (In), gallium (Ga), and selenium (Se).

[0026] Two or more photovoltaic sheets 16 are attached side by side to the non-horizontal surface 14 of the structure 10. An adhesive layer 18 is interposed between the photovoltaic sheets 16 and the outer surface 12. The peripheral edges of the photovoltaic sheets 16 may be secured with adhesive tape (not shown) attached from above. In this way, the photovoltaic sheets 16 in this embodiment are attached to the structure 10 by adhesion. This eliminates the need to form mounting holes for attaching bolts or the like in the outer surface 12 (wall surface) of the structure 10, making installation easy.

[0027] The solar power generation sheets 16 are arranged so that the long sides of their rectangular outer shapes are horizontal. The solar power generation sheets 16A of the first group are arranged one above the other. The solar power generation sheets 16B of the second group are arranged one above the other. One solar power generation sheet 16A of the first group and one solar power generation sheet 16B of the second group are lined up horizontally with a gap between them.

[0028] As shown in Figure 4, a connector box 20 is attached to the photovoltaic sheet 16. An electric cable 22 is connected to the connector box 20. The electric cable 22 is a cable that transmits the electric energy generated by the photovoltaic sheet 16 to the outside. Each of the two or more electric cables 22 is electrically connected to a corresponding one of the two or more photovoltaic sheets 16.

[0029] As shown in FIG. 1 , the main wires 24 extend vertically at intervals on the outer surface 12 of the structure 10. The main wires 24 are horizontally located between the first group of photovoltaic sheets 16A and the second group of photovoltaic sheets 16B. The main wires 24 are wire cables, but may also be rust-proofed piano wire or alloy steel wire. The main wires 24 are made of metal and are flexible. Two or more electric cables 22 are bundled around the main wire 24. The electric cables 22 extend along the main wire 24 to a current collector (not shown) installed on the roof of the structure 10.

[0030] The main wire 24 is stretched across a pair of fixtures 26 (e.g., anchors). The pair of fixtures 26 are fixed to the roof and ground portions (not shown) of the structure 10. To secure the fixtures, fixing holes (not shown) are formed on the roof and ground portions. The pair of fixtures 26 are located at a pair of positions at different heights. Tension is applied to the main wire 24 between the pair of fixtures 26. A turnbuckle, for example, may be installed between the fixtures 26 and the main wire 24 so that the tension of the main wire 24 can be adjusted.

[0031] Two or more sub-wires 28 are connected to the main wire 24. Each of the two or more sub-wires 28 is connected to a corresponding one of the two or more photovoltaic sheets 16. The sub-wires 28 are preferably wound and tightened around a connector box 20 attached to the photovoltaic sheet 16, and a stopper (not shown) is preferably provided. The sub-wires 28 are also connected to the main wire 24. Figure 5 shows the connection between the main wire 24 and the sub-wires 28. A wire clip 30 is used for the connection.

[0032] According to this embodiment, the main wire 24 and the sub-wire 28 can prevent the photovoltaic sheet 16 from falling or scattering. The main wire 24 is hung between a pair of mounting fixtures 26 provided on the roof and ground of the structure 10, and the photovoltaic sheet 16 installed by pasting is secured to the main wire 24 by the sub-wire 28. This means that the photovoltaic sheet 16 can be installed without forming mounting holes in the wall surface of the structure 10, and furthermore, the photovoltaic sheet 16 can be prevented from falling or scattering due to strong winds, etc.

[0033] [Variations] 6 is a diagram showing a modified example of the first embodiment. In this modified example, a spacer 132 is interposed between the main wire 24 and the outer surface 12. The spacer 132 is in contact with the outer surface 12 without being fixed thereto. The spacer 132 can further prevent the main wire 24 from contacting the outer surface 12.

[0034] [Second embodiment] 7 is a schematic front view of a structure equipped with a photovoltaic sheet according to the second embodiment. This embodiment is an example suitable for a horizontally long structure, and the structure 210 is, for example, a highway soundproof wall, and is installed outside a guardrail 232. The structure may also be the side wall surface of a railway track.

[0035] The two or more photovoltaic sheets 216 are arranged horizontally. Each of the two or more photovoltaic sheets 216 has a rectangular planar shape and is arranged so that the short side of the rectangle is horizontal. The main wire 224 is located at a higher position than the two or more photovoltaic sheets 216. The main wire 224 extends horizontally. A pair of mounting fixtures 226 are located at a pair of positions at the same height as the main wire 224. A sub-wire 228 is connected to the main wire 224 by a wire clip 230. The rest of the details are the same as those described in the first embodiment.

[0036] [Third embodiment] 8 is a schematic front view of a structure equipped with a photovoltaic sheet according to embodiment 3. Like the second embodiment, structure 310 is a horizontally long structure such as a highway soundproof wall or the side wall of a railway track.

[0037] Each of the two or more photovoltaic sheets 316 has a rectangular planar shape and is arranged along the extension direction of the structure with the long side of the rectangle horizontal, and two sheets (or three or more sheets if the structure is tall) are arranged side by side in the vertical direction. A main wire 324 is located higher than the two or more photovoltaic sheets 316. The main wire 324 extends horizontally. A pair of mounting fixtures 326 are located at a pair of positions at the same height as the main wire 324. A relay wire 329 is connected to the main wire 324 by a wire clip 330. Each photovoltaic sheet 316 is connected to the relay wire 329 by a sub-wire 328. The sub-wire 328 is connected to the main wire 324 via the relay wire 329. The rest of the details are the same as those described in the first embodiment.

[0038] The present invention is not limited to the above-described embodiment and various modifications are possible. For example, in this embodiment, an example in which the photovoltaic sheet is installed on a non-horizontal surface is shown, but it can also be installed on a horizontal surface in the same manner. Note that the configurations described in the embodiments can be replaced with substantially the same configurations, configurations that achieve the same effects, or configurations that can achieve the same purpose. [Explanation of symbols]

[0039] 10 structure, 12 outer surface, 14 non-horizontal surface, 16 photovoltaic sheet, 16A first group photovoltaic sheet, 16B second group photovoltaic sheet, 18 adhesive layer, 20 connector box, 22 electrical cable, 24 main wire, 26 mounting fixture, 28 sub-wire, 30 wire clip, 132 spacer, 210 structure, 216 photovoltaic sheet, 224 main wire, 226 mounting fixture, 228 sub-wire, 230 wire clip, 232 guardrail, 310 structure, 316 photovoltaic sheet, 324 main wire, 326 mounting fixture, 328 sub-wire, 329 relay wire, 330 wire clip.

Claims

1. Two or more solar panels attached side by side to a vertical or inclined non-horizontal or horizontal surface on the exterior of a structure; a pair of spaced apart fixtures secured to the exterior surface of the structure; a main wire extending from the outer surface of the structure at a position with a gap therebetween and stretched across the pair of mounting fixtures so as to be under tension; two or more sub-wires connected to the main wire, each sub-wire connected to a corresponding one of the two or more photovoltaic sheets; two or more electric cables bundled with the main wire, extending along the main wire, and each electrically connected to a corresponding one of the two or more photovoltaic sheets; A structure equipped with a photovoltaic sheet, characterized by having:

2. A structure comprising the photovoltaic sheet according to claim 1, A structure equipped with a photovoltaic sheet, wherein the pair of mounting fixtures are located at a pair of different height positions.

3. A structure comprising the photovoltaic sheet according to claim 2, A structure equipped with a photovoltaic sheet, wherein the main wires extend vertically.

4. A structure comprising the photovoltaic sheet according to claim 2 or 3, the two or more photovoltaic sheets comprise a first group of photovoltaic sheets arranged one above the other and a second group of photovoltaic sheets arranged one above the other; A structure comprising photovoltaic sheets, wherein the main wire is located between the first group of photovoltaic sheets and the second group of photovoltaic sheets in the horizontal direction.

5. A structure comprising the photovoltaic sheet according to claim 4, A structure equipped with photovoltaic sheets, wherein each of the two or more photovoltaic sheets has a rectangular planar shape and is arranged so that the long sides of the rectangles are horizontal.

6. A structure comprising the photovoltaic sheet according to claim 1, The pair of fixtures are at a pair of positions at the same height, A structure equipped with a photovoltaic sheet, wherein the main wires extend horizontally.

7. A structure comprising the photovoltaic sheet according to claim 6, A structure equipped with a photovoltaic sheet, wherein the two or more photovoltaic sheets are arranged in the horizontal direction.

8. A structure comprising the photovoltaic sheet according to claim 7, A structure provided with a photovoltaic sheet, wherein the main wire is located at a position farther away from the structure than the two or more photovoltaic sheets.

9. A structure comprising the photovoltaic sheet according to claim 8, A structure equipped with photovoltaic sheets, wherein each of the two or more photovoltaic sheets has a rectangular planar shape and is arranged so that the short sides of the rectangles are horizontal.

10. A structure comprising the photovoltaic sheet according to any one of claims 1 to 9, A structure comprising a photovoltaic sheet, further comprising a spacer interposed between the main wire and the outer surface and in contact with the outer surface without being fixed thereto.

11. A structure comprising the photovoltaic sheet according to any one of claims 1 to 10, A structure equipped with a photovoltaic sheet, wherein the main wire is a wire cable.

12. A structure comprising the photovoltaic sheet according to any one of claims 1 to 11, A structure equipped with a photovoltaic sheet, characterized in that the tension of the main wire is adjustable.

13. A structure comprising the photovoltaic sheet according to any one of claims 1 to 12, A structure comprising a photovoltaic sheet, further comprising an adhesive layer interposed between each of the two or more photovoltaic sheets and the outer surface of the structure.

14. A structure comprising the photovoltaic sheet according to any one of claims 1 to 13, A structure equipped with a photovoltaic sheet, wherein the outer surface of the structure is made of a cement-based material.

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