Solar power generation device, installation structure for solar power generation device

Abstract

To provide a solar power generation device capable of suppressing wind from blowing between the solar power generation device and an installation surface, thereby suppressing vibration of the solar power generation device due to lift caused by wind.SOLUTION: A solar power generation device 3 according to the present invention includes a power generation unit 10 that generates electricity when light is incident on it, and in order to install the solar power generation device 3 on an installation surface 2, a frame member 50 is placed on an outer edge portion 5 of the solar power generation device 3 and the frame member 50 is pressed against the installation surface 2. An elastic member 6 having an elastic modulus of 4000 MPa or less is provided on the outer edge portion 5 of the solar power generation device 3 around the entire periphery of the outer edge portion 5.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a photovoltaic power generation device in which a frame member is disposed on an outer edge portion and pressed against an installation surface side for installation on the installation surface, and an installation structure of the photovoltaic power generation device.

Background Art

[0002] Conventionally, a photovoltaic power generation device (for example, Patent Document 1) that generates electricity by the incidence of sunlight has been used. When installing the photovoltaic power generation device on an installation surface, for example, as shown in FIG. 13(A), a frame member 200 is disposed on an outer edge portion 202 of the photovoltaic power generation device 201, and the frame member 200 is pressed against the installation surface 204 side by a pressing member 203 such as a bolt, thereby fixing the photovoltaic power generation device 201.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when the photovoltaic power generation device 201 has poor elasticity due to factors such as the thinness of the photovoltaic power generation device 201, it is difficult to bring the frame member 200 into close contact with the outer edge portion 202 of the photovoltaic power generation device 201. Therefore, the photovoltaic power generation device 201 may not be strongly pressed against the installation surface 204. In this case, the wind 300 (FIG. 13(B)) blows between the photovoltaic power generation device 201 and the installation surface 204, and the photovoltaic power generation device vibrates violently due to the lifting force of the wind, resulting in a situation where the photovoltaic power generation device 201 is damaged.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a photovoltaic power generation device capable of suppressing the inflow of wind between the photovoltaic power generation device and the installation surface, and suppressing vibration of the photovoltaic power generation device due to the lift force of the wind, and an installation structure of the photovoltaic power generation device.

Means for Solving the Problems

[0006] To achieve the above object, the present invention includes the subject matter described in the following items.

[0007] Item 1. A photovoltaic power generation device including a power generation unit that generates power by the incidence of light, and in order to be installed on an installation surface, a frame member is disposed on an outer edge portion, and the frame member is pressed toward the installation surface side, A photovoltaic power generation device in which an elastic member having an elastic modulus of 4000 MPa or less is provided over the entire circumference of the outer edge portion.

[0008] Item 2. A photovoltaic power generation device including a photovoltaic power generation sheet including the power generation unit, The photovoltaic power generation device according to Item 1, wherein the outer edge portion includes an outer peripheral portion of the photovoltaic power generation sheet and the elastic member joined to the outer peripheral portion of the photovoltaic power generation sheet.

[0009] Item 3. The outer edge portion includes an outer peripheral portion of the photovoltaic power generation sheet, a first elastic member, and a second elastic member, The outer peripheral portion of the photovoltaic power generation sheet has a wavy shape in which a curved portion convex toward the opposite side of the installation surface and an installation surface side curved portion convex toward the installation surface side alternate with each other, The photovoltaic power generation device according to Item 2, wherein the first elastic member is joined to an outer surface of the opposite side curved portion, and the second elastic member is joined to an outer surface of the installation surface side curved portion.

[0010] Item 4. A photovoltaic power generation device including a photovoltaic power generation sheet including the power generation unit, The photovoltaic power generation device according to Item 2, wherein the outer edge portion is constituted by the elastic member joined to the outer peripheral portion of the photovoltaic power generation sheet so as to surround the photovoltaic power generation sheet.

[0011] Item 5. A solar power generation sheet including the power generation unit, The solar power generation device according to Item 1, wherein the outer edge portion includes an outer peripheral portion of the solar power generation sheet and the elastic member disposed inside the outer peripheral portion of the solar power generation sheet.

[0012] Item 6. The solar power generation device according to any one of Items 2 to 5, wherein the elastic member has an annular shape along the entire circumference of the solar power generation sheet, so that the elastic member is provided over the entire circumference of the outer edge portion.

[0013] Item 7. The solar power generation device according to any one of Items 2 to 5, wherein a plurality of the elastic members are sequentially arranged in the circumferential direction of the solar power generation sheet, and the ends of two adjacent elastic members are butted against each other, so that the elastic member is provided over the entire circumference of the outer edge portion.

[0014] Item 8. The solar power generation device according to any one of Items 2 to 5, wherein the elastic members are respectively disposed inside and outside an annular line extending along the periphery of the solar power generation sheet, and in a viewing direction orthogonal to the annular line and parallel to the outer surface of the solar power generation sheet, the elastic members disposed inside and outside the annular line are continuous, so that the elastic member is provided over the entire circumference of the outer edge portion.

[0015] Item 9. A solar power generation sheet including the power generation unit, The solar power generation device according to Item 1, wherein the elastic member is constituted by a member constituting an outer peripheral portion of the solar power generation sheet.

[0016] Item 10. The solar power generation sheet has the power generation unit disposed between a back sheet disposed on the installation surface side and a barrier sheet disposed on the side opposite to the installation surface, The solar power generation device according to Item 9, wherein the outer peripheral portion of the barrier sheet and the outer peripheral portion of the back sheet are included as the elastic member.

[0017] Item 11. The photovoltaic sheet is filled with a sealing agent between the barrier sheet and the back sheet. The photovoltaic power generation device according to Item 10, wherein the elastic member includes a portion of the sealing agent filled between the outer peripheral portion of the barrier sheet and the outer peripheral portion of the back sheet.

[0018] Item 12. The photovoltaic power generation device according to any one of Items 1 to 11, wherein the power generation unit is provided in a light receiving unit which is a range other than the outer edge portion.

[0019] Item 13. The photovoltaic power generation device according to any one of Items 1 to 12, wherein the thickness of the outer edge portion is larger than the thickness of the light receiving unit which is a range other than the outer edge portion.

[0020] Item 14. The photovoltaic power generation device according to Item 13, wherein the thickness of the outer edge portion is 1.1 times or more the thickness of the light receiving unit.

[0021] Item 15. An installation surface, The photovoltaic power generation device according to any one of Items 1 to 14 provided on the installation surface, And a fixture for fixing the photovoltaic power generation device, The fixture includes, A frame member provided around the photovoltaic power generation device and disposed on the outer edge portion of the photovoltaic power generation device, And a pressing member for pressing the frame member toward the installation surface side. An installation structure of a photovoltaic power generation device.

[0022] Item 16. The installation structure of a photovoltaic power generation device according to Item 15, including the photovoltaic power generation device according to any one of Items 2 to 11 provided on the installation surface, Wherein the bending strength of the photovoltaic sheet is 10 MPa or more and 200 MPa or less.

[0023] Item 17. The installation structure of a photovoltaic power generation device according to Item 15 or 16, including the photovoltaic power generation device according to any one of Items 2 to 11 provided on the installation surface, Wherein the bending modulus of elasticity of the photovoltaic sheet is 500 MPa or more and 10,000 MPa or less.

[0024] Item 18. The photovoltaic power generation device according to any one of Items 2 to 11 is provided on the installation surface, The installation structure of the photovoltaic power generation device according to any one of Items 15 to 17, wherein the bending radius of the photovoltaic power generation sheet is 10 cm or less.

[0025] Item 19. The frame member is composed of a plurality of frames arranged in the circumferential direction of the photovoltaic power generation device, Each of the frames is arranged on the outer edge portion of the photovoltaic power generation device, A pressing member is provided for each of the frames, The installation structure of the photovoltaic power generation device according to any one of Items 15 to 18, wherein each of the pressing members presses the corresponding frame toward the installation surface side.

Effect of the Invention

[0026] According to the present invention, it is possible to suppress the wind from blowing between the photovoltaic power generation device and the installation surface, and thus it is possible to suppress the vibration of the photovoltaic power generation device due to the lift force caused by the wind.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0028] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing an installation structure 1 of a photovoltaic power generation device 3 according to an embodiment of the present invention. FIG. 2(A) is a cross-sectional view showing a state in which the installation structure 1 is cut along line A-A of FIG. 1. FIG. 2(B) is a cross-sectional view showing a state in which the installation structure 1 is cut along line B-B of FIG. 1.

[0029] The installation structure 1 according to the present embodiment includes an installation surface 2, a photovoltaic power generation device 3 provided on the installation surface 2, and a fixture 4 for fixing the photovoltaic power generation device 3.

[0030] The installation surface 2 is constituted by the surface of a building material. Examples of the building material include roofing materials, wall materials (such as metal siding materials, ceramic siding materials, and sandwich panels), partitions, door materials, fence materials, floor materials, etc. Examples of the roofing materials include roofing materials used for folded plate roofs, slate roofs, roof decks, tile batten roofs, and flat roofs. The roof may be vertically tiled or horizontally tiled. Note that the present invention is not limited to the above-mentioned building materials for the member having the installation surface 2, and the installation surface 2 may be constituted by the surface of a paving body forming a road, or may be the surface of a structure such as an automobile, a train, or a ship. Also, in the illustrated example, the installation surface 2 is a plane, but it may be a curved surface. Also, the material of the member constituting the installation surface 2 is not particularly limited, and may be, for example, metal, resin, asphalt, or concrete.

[0031] (Photovoltaic power generation device 3) The photovoltaic power generation device 3 includes a power generation unit 10 that generates power by the incidence of light. An elastic member 6 having an elastic modulus of 4000 MPa or less is provided over the entire circumference of the outer edge portion 5 of the photovoltaic power generation device 3. In order to install the photovoltaic power generation device 3 on the installation surface 2, a frame member 50 described later is arranged to contact the outer edge portion 4 of the photovoltaic power generation device 3, and the frame member 50 is pressed against the installation surface 2 side. From the viewpoint of irradiating the power generation unit 10 with sunlight to cause the power generation unit 10 to generate power, the power generation unit 10 is provided in a light receiving unit 13 that is a range other than the outer edge portion 5 in the photovoltaic power generation device 3 (a range of the photovoltaic power generation device 3 where sunlight is not blocked by the frame member 50).

[0032] More specifically, the photovoltaic power generation device 3 includes a sheet-like photovoltaic power generation sheet 7 having the above-described power generation unit 10, and the above-described elastic member 6 joined to the outer surface of the outer peripheral portion of the photovoltaic power generation sheet 7. As used herein, "sheet-like" means a shape in which the thickness of the object is 10% or less with respect to the maximum length between the outer edges in a plan view. For example, when the shape in a plan view is rectangular, the "maximum length between the outer edges in a plan view" means the length of the diagonal line. Also, for example, when the shape in a plan view is circular, the "maximum length between the outer edges in a plan view" means the length of the diameter. In this specification, a film-like, foil-like, film-like shape, etc. are also included in the "sheet-like".

[0033] The photovoltaic power generation sheet 7 is formed in a substantially rectangular shape when viewed from the front. However, the present invention does not particularly limit the shape of the photovoltaic power generation sheet 7, and the photovoltaic power generation sheet 7 may be, for example, substantially circular in a plan view, elliptical in a plan view, polygonal in a plan view, or the like.

[0034] The photovoltaic sheet 7 has flexibility (the property that an object can be bent). In the present invention, that the photovoltaic sheet 7 has flexibility means that the photovoltaic sheet 7 has a flexural strength of 10 MPa or more, or that the photovoltaic sheet 7 has a flexural modulus of elasticity of 100 MPa or more. The flexural strength of the photovoltaic sheet 7 is more preferably 20 MPa or more, and more preferably 50 MPa or more. Also, the flexural strength of the photovoltaic sheet 7 is preferably 200 MPa or less, more preferably 150 MPa or less, and even more preferably 50 MPa or less. Also, the flexural modulus of elasticity of the photovoltaic sheet 7 is more preferably 500 MPa or more. Also, the flexural modulus of elasticity of the photovoltaic sheet 7 is preferably 10,000 MPa or less, more preferably 5,000 MPa or less. When evaluating the flexibility of the photovoltaic sheet 7 by flexural strength, the flexural modulus of elasticity may not be within the above range. When evaluating the flexibility of the photovoltaic sheet 7 by flexural modulus of elasticity, the flexural strength may not be within the above range. The measuring methods for the flexural strength and flexural modulus of elasticity of the photovoltaic sheet 7 are measured in accordance with JIS K 7171. The bending radius of the photovoltaic sheet 7 is preferably 10 cm or less, and the bending radius of the photovoltaic sheet 7 is measured using an R caliper (radius measuring instrument) or the like.

[0035] FIG. 3(A) is a cross-sectional view showing the state where the photovoltaic sheet 7 is cut. FIG. 3(B) is an enlarged view of part a in FIG. 3(A). FIG. 3(C) is a cross-sectional view showing the state where the power generation part 10 is cut along the C-C line in FIG. 3(A).

[0036] The photovoltaic sheet 7 is configured such that the power generation part 10 and the sealing agent 11 are disposed between a back sheet 8 disposed on the side of the installation surface 2 and a barrier sheet 9 disposed on the side opposite to the installation surface 2, and the sealing agent 11 is filled around the power generation part 10. A sealing edge member 12 for sealing between the outer peripheral edge of the barrier sheet 9 and the outer peripheral edge of the back sheet 8 is provided at the outer peripheral edge of the photovoltaic sheet 7 (in FIGS. 2 and FIGS. 7 to 11 described later, the illustration of the sealing edge member 12 is omitted). The photovoltaic sheet 7 generates electricity in the power generation part 10 when the light irradiated on the outer surface 13 of the barrier sheet 9 enters the power generation part 10.

[0037] (Backsheet 8) The backsheet 8 has barrier performance against water vapor and protection performance against external forces. The backsheet 8 may have translucency, but translucency is not necessarily required. As used herein, "having translucency" means that the light transmittance is greater than 15% with respect to the peak wavelength of the light before incidence. Examples of the material of the backsheet 8 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, vinyl resins (e.g., polyvinyl chloride), natural resins, rubbers, metals, carbon, pulp, and the like.

[0038] The longitudinal elastic modulus of the backsheet 8 is preferably 2400 MPa or more, more preferably 3000 MPa or more. Also, the longitudinal elastic modulus of the backsheet 8 is preferably 4200 MPa or less, more preferably 3100 MPa or less. Examples of the material of the backsheet 8 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, vinyl resins (e.g., polyvinyl chloride). Also, in addition to synthetic resins, for example, natural resins, rubbers, metals, carbon, pulp, and the like may be used as the material of the backsheet 8.

[0039] The thickness of the backsheet 8 is preferably 50 μm or more, more preferably 100 μm or more. Also, the thickness of the backsheet 8 is preferably 2000 μm or less, more preferably 1000 μm or less.

[0040] (Power generation unit 10) The power generation unit 10 includes a power generation cell 20 which is a photoelectric conversion element using the photovoltaic effect. In the present embodiment, the power generation unit 10 is composed of a photoelectric conversion unit in which a plurality of power generation cells 20 are arranged in the plane direction of the solar power generation sheet 7 (for example, the longitudinal direction or the width direction of the solar power generation sheet 7). Note that the power generation unit 10 may be composed of one power generation cell 20.

[0041] (Power generation cell 20) The power generation cell 20 includes a translucent substrate 21, a translucent conductive layer 22, a power generation layer 23, and an electrode 24. The translucent substrate 21, the translucent conductive layer 22, the power generation layer 23, and the electrode 24 are laminated in this order along the direction from the barrier sheet 9 toward the back sheet 8. That is, the translucent substrate 21 is disposed to face the barrier sheet 9, and the electrode 24 is disposed to face the back sheet 8.

[0042] (Translucent substrate 21) The translucent substrate 21 supports the translucent conductive layer 22, the power generation layer 23, and the electrode 24. The translucent substrate 21 has translucency. The translucency of the translucent substrate 21 only needs to have a light transmittance greater than 15% with respect to the peak wavelength of the light before incidence, but is preferably 50% or more, and more preferably 80% or more. In this specification, when the light transmittance is 80% or more with respect to the peak wavelength of the light before incidence, it is regarded as "transparent".

[0043] Examples of the material of the translucent substrate 21 include inorganic materials, organic materials, and metal materials. Examples of the inorganic materials include quartz glass and non-alkali glass. Examples of the organic materials include plastics such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene, polyimide, polyamide, polyamideimide, liquid crystal polymer, and cycloolefin polymer, and polymer films. Examples of the metal materials include stainless steel, aluminum, titanium, and silicon.

[0044] The thickness of the translucent substrate 21 is not particularly limited as long as it can support the translucent conductive layer 22, the power generation layer 23, and the electrode 24, and examples thereof include 10 μm or more and 300 μm or less.

[0045] The light-transmissive substrate 21 is a substrate required in the manufacturing process of the power generation cell 20, and is not necessarily an essential component. The light-transmissive substrate 21 may be used, for example, only during the manufacturing process of the solar power generation sheet 7, and may be removed after manufacturing or during manufacturing. In addition, when removed, a substrate without light-transmittance may be used instead of the light-transmissive substrate 21.

[0046] (Light-transmissive conductive layer 22) The light-transmissive conductive layer 22 is a conductive layer and functions as a cathode. The light-transmissive conductive layer 22 has light-transmittance. The light-transmissive conductive layer 22 is preferably transparent.

[0047] Examples of the light-transmissive conductive layer 22 include transparent materials such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), and Nesa film. The light-transmissive conductive layer 22 is formed on the surface of the light-transmissive substrate by, for example, sputtering, ion plating, plating, coating, or the like.

[0048] In addition, as the light-transmissive conductive layer 22, a pattern that allows light to pass through may be formed while using an opaque material so that it has light-transmittance. Examples of the opaque material include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or alloys containing these. Examples of the pattern that allows light to pass through include a lattice shape, a linear shape, a wavy shape, a honeycomb shape, a round hole shape, and the like.

[0049] The thickness of the light-transmissive conductive layer 22 is preferably, for example, 30 nm or more and 300 nm or less. When the light-transmissive conductive layer 22 is 30 nm or more and 300 nm or less, good conductivity can be obtained while maintaining high flexibility.

[0050] (Power generation layer 23) The power generation layer 23 is a layer that causes photoelectric conversion by irradiation with light, and generates electrons and holes from excitons generated by absorbing light. As shown in Fig. 3(B), the power generation layer 23 includes a hole transport layer 30, a photoelectric conversion layer 31, and an electron transport layer 32. The hole transport layer 30, the photoelectric conversion layer 31, and the electron transport layer 32 are laminated in this order along the direction from the transparent conductive layer 22 toward the electrode 24.

[0051] (Hole transport layer 30) The hole transport layer 30 extracts the holes generated in the photoelectric conversion layer 31 to the transparent conductive layer 22, and prevents the electrons generated in the photoelectric conversion layer 31 from moving to the transparent conductive layer 22. As the material of the hole transport layer 30, for example, metal oxides can be used. Examples of the metal oxides include titanium oxide, molybdenum oxide, vanadium oxide, zinc oxide, nickel oxide, lithium oxide, calcium oxide, cesium oxide, aluminum oxide, etc. In addition, other delafossite-type compound semiconductors (CuGaO2), copper oxide, copper thiocyanate (CuSCN), vanadium pentoxide (V2O5), graphene oxide, etc. may also be used. Further, a p-type organic semiconductor or a p-type inorganic semiconductor can also be used as the material of the hole transport layer 30.

[0052] The thickness of the hole transport layer 30 is preferably, for example, 1 nm or more and 1000 nm or less, more preferably 10 nm or more and 500 nm or less, and still more preferably 10 nm or more and 50 nm or less. If the thickness of the hole transport layer 30 is 1 nm or more and 1000 nm or less, the transport of holes can be realized.

[0053] (Photoelectric conversion layer 31) The photoelectric conversion layer 31 (photoactive layer) is a layer that photoelectrically converts the absorbed light. The material of the photoelectric conversion layer 31 is not particularly limited as long as it can photoelectrically convert the absorbed light. For example, amorphous silicon, perovskite, non-silicon-based materials (semiconductor material CIGS), etc. are used. Further, the photoelectric conversion layer 31 may have a tandem-type laminated structure in which these are combined. The photoelectric conversion layer 31 using a non-silicon-based material uses a semiconductor material CIGS containing copper (Cu), indium (In), gallium (Ga), and selenium (Se), and it is easy to reduce the thickness of the photoelectric conversion layer.

[0054] Hereinafter, as an example of the case where the power generation unit 10 contains an organic component, the case where a perovskite compound containing an organic component is included in the photoelectric conversion layer 31 of the power generation unit 10 will be described. The photoelectric conversion layer 31 containing a perovskite compound has an advantage that the dependence of the power generation efficiency on the angle of incident light (hereinafter sometimes referred to as the incident angle dependence) is relatively low. Thereby, in the present embodiment, higher power generation efficiency can be obtained.

[0055] A perovskite compound is a perovskite crystal structure and a structure having a crystal similar thereto. The perovskite crystal structure is represented by the composition formula ABX3. In this composition formula, for example, A represents an organic cation, B represents a metal cation, and X represents a halogen anion. However, the A site, B site, and X site are not limited thereto.

[0056] The organic group of the organic cation constituting the A site is not particularly limited, and examples thereof include an alkylammonium derivative and a formamidinium derivative. The organic cation constituting the A site may be one type or two or more types.

[0057] The metal of the metal cation constituting the B site is not particularly limited, and examples thereof include Cu, Ni, Mn, Fe, Co, Pd, Ge, Sn, Pb, Eu, etc. The metal cation constituting the B site may be one type or two or more types.

[0058] There is no particular limitation on the halogen of the halogen anion constituting the X site, and examples thereof include F, Cl, Br, I, etc. The halogen anion constituting the X site may be one type or two or more types.

[0059] The thickness of the photoelectric conversion layer 31 is preferably, for example, 1 nm or more and 1000000 nm or less, more preferably 100 nm or more and 50000 nm or less, and still more preferably 300 nm or more and 1000 nm or less. When the thickness of the photoelectric conversion layer 31 is 1 nm or more and 1000000 nm or less, the photoelectric conversion efficiency is improved.

[0060] (Electron transport layer 32) The electron transport layer 32 extracts the electrons generated in the photoelectric conversion layer 31 to the electrode 24 and prevents the holes generated in the photoelectric conversion layer 31 from moving to the electrode 24. As the electron transport layer 32, it is preferably, for example, either a halogen compound or a metal oxide.

[0061] Examples of the halogen compound include lithium halides (LiF, LiCl, LiBr, LiI), sodium halides (NaF, NaCl, NaBr, NaI), etc. Examples of the elements constituting the metal oxide include titanium, molybdenum, vanadium, zinc, nickel, lithium, potassium, cesium, aluminum, niobium, tin, barium, etc. Also, an n-type organic semiconductor or an n-type inorganic semiconductor can be used as the material of the electron transport layer 32.

[0062] The thickness of the electron transport layer 32 is preferably, for example, 1 nm or more and 1000 nm or less, more preferably 10 nm or more and 500 nm or less, and still more preferably 10 nm or more and 50 nm or less. If the thickness of the electron transport layer 32 is 1 nm or more and 1000 nm or less, the transport of electrons can be realized.

[0063] (Electrode 24) The electrode 24 has conductivity and functions as an anode. The electrode 24 can extract electrons from the photoelectric conversion layer 31 in response to the photoelectric conversion generated by the photoelectric conversion layer 31. The electrode 24 may be formed of a light-transmitting material or an opaque material. However, if the electrode 24 is formed of an opaque material, the light-shielding property of the solar power generation sheet 7 can be further improved (that is, the incidence of light from the opposite side of the surface 6 to the power generation unit 10 can be further suppressed). Examples of the material of the electrode 24 include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or alloys containing these.

[0064] (Barrier sheet 9) The barrier sheet 9 has light-transmitting properties and is preferably transparent. The barrier sheet 9 has barrier performance against water vapor and protection performance against external forces.

[0065] The barrier sheet 9 has flexibility. The material used for the barrier sheet 9 preferably has a longitudinal elastic modulus of 100 Pa or more and 10,000 MPa or less, and more preferably 1,000 MPa or more and 5,000 MPa or less. Specific examples of the material of the barrier sheet 9 include plastic films and vinyl films.

[0066] The thickness of the barrier sheet 9 is preferably 50 μm or more, and more preferably 100 μm or more. Also, the thickness of the barrier sheet 9 is preferably 2,000 μm or less, and more preferably 1,000 μm or less. When the thickness of the barrier sheet 9 is 50 μm or more and 2,000 μm or less, the bending strength of the solar power generation sheet 7 can be easily set to 50 MPa or more and 150 MPa or less.

[0067] (Sealant 11) The encapsulant 11 prevents water from entering the power generation layer 23 from the surroundings of the power generation layer 23. The encapsulant 11 has light transmissivity and is preferably transparent. Note that the encapsulant 11 does not necessarily need to cover the entire power generation unit 10. For example, when a part of the power generation unit 10 is exposed from the encapsulant 11, the exposed portion may be covered with a sealing edge material 12 or the like.

[0068] Examples of the material of the encapsulant 11 include ethylene vinyl acetate (EVA), polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, SBS resin, SIBS resin, epoxy resin, and the like.

[0069] The lateral elastic modulus of the encapsulant 11 is preferably 0.01 or more and 500 MPa or less, more preferably 0.05 or more and 250 MPa or less, and still more preferably 0.1 or more and 100 MPa or less. By doing so, the encapsulant 11 deforms in the plane direction following the thermal expansion and contraction caused by the temperature difference between the backsheet 8 and the barrier sheet 9. Thereby, it is possible to suppress the peeling of the backsheet 8 and the barrier sheet 9 from the encapsulant 11 due to the shear stress generated by the thermal expansion and contraction. The "lateral elastic modulus" referred to in the present application is a value calculated from the longitudinal elastic modulus and the Poisson's ratio obtained by, for example, the tensile test method.

[0070] Also, the encapsulant 11 can be defined by viscosity from another viewpoint. The viscosity of the encapsulant 11 is preferably 11000 mPa·S or more and 700000 mPa·S or less, more preferably 26000 mPa·S or more and 450000 mPa·S or less, and still more preferably 40000 mPa·S or more and 110000 mPa·S or less.

[0071] Examples of the material of the encapsulant 11 in this case include polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, and the like. The "viscosity" referred to in this specification is a value measured at an environmental temperature of 23°C in accordance with the rotational viscometer method of JIS Z8803.

[0072] The backsheet 8 and the barrier sheet 9 are adhered via the sealant 11, and the adhesive strength thereof is preferably 0.1 N / 10 mm or more and 10 N / 10 mm or less in a peel test. In particular, when it is applied in a bent state, the shear stress generated in the photovoltaic sheet 7 becomes larger. Therefore, by adopting the adhesive strength within the above range in the peel test, peeling over a long period can be effectively suppressed. The peel test is performed in accordance with JIS Z 0237.

[0073] From the viewpoint of enhancing the effect of suppressing peeling, the thickness of the sealant 11 is preferably 10 μm or more, more preferably 30 μm or more, and still more preferably 50 μm or more. On the other hand, the thickness of the sealant 11 is preferably 300 μm or less, more preferably 200 μm or less, and still more preferably 100 μm or less. By setting the thickness of the sealant 11 to 10 μm or more, a sufficient escape margin for the shear stress during thermal expansion and contraction can be ensured. By setting the thickness of the sealant 11 to 300 μm or less, the weight of the photovoltaic sheet 7 can be reduced, and thus the workability and handling property can be improved.

[0074] (Sealing edge material 12) The sealing edge material 12 has a structure in which a first adhesive portion 40 adhered to the outer surface of the barrier sheet 9, a sealing portion 41 for sealing between the barrier sheet 9 and the backsheet 8, and a second adhesive portion 42 adhered to the outer surface of the backsheet 8 are sequentially connected.

[0075] Examples of the material of the sealing edge material 12 include tape materials made of butyl rubber, silicone rubber, and the like.

[0076] (Function of the photovoltaic sheet 7) According to the above-described photovoltaic sheet 7, when the light irradiated on the outer surface of the barrier sheet 9 enters the power generation unit 10, the photoelectric conversion layer 31 of the power generation layer 23 absorbs the light and performs photoelectric conversion, thereby generating electrons and holes in the photoelectric conversion layer 31. The electrons are extracted to the electrode 24 (anode) through the electron transport layer 32, and the holes are extracted to the translucent conductive layer 22 (cathode) through the hole transport layer 30, so that a current flows from the translucent conductive layer 22 to the electrode 24 (i.e., power generation is performed).

[0077] In the photoelectric conversion unit constituting the power generation unit 10, an extension portion 24a is provided on the electrode 24 (anode) of each power generation cell 20 (FIG. 3(C)). The extension portion 24a of the electrode 24 extends toward the translucent conductive layer 22 (cathode). In two adjacent power generation cells 20, 20, the extension portion 24a of the electrode 24 of one cell 20 is joined to the translucent conductive layer 22 of the other cell 20. Due to this joining, while the photovoltaic sheet 7 is irradiated with light, a current flows from the translucent conductive layer 22A at one end of the power generation unit 10 (photoelectric conversion unit) to the electrode 24A at the other end of the power generation unit 10 (the flow of the current is indicated by an arrow in FIG. 3(C)). The current is taken out through a power distribution line (not shown).

[0078] By configuring the power generation unit 10 from the above-described photoelectric conversion unit, even if a defect occurs in some of the power generation cells 20, the amount of electricity extracted from the power generation unit 10 can be stabilized.

[0079] Instead of providing the extension portion 24a on the electrode 24 (anode) of each power generation cell 20, an extension portion extending toward the electrode 24 (anode) side may be provided on the translucent conductive layer 22 (cathode) of each power generation cell 20. In this case, in two adjacent power generation cells 20, 20, the extension portion of the translucent conductive layer 22 of one cell 20 is joined to the electrode 24 of the other cell 20. Even in this way, the same effect as described above can be obtained.

[0080] When a translucent base material 21 is provided for the power generation unit 10, from the viewpoint of facilitating the manufacture of the power generation unit 10, as shown in FIG. 3(C), it is preferable that the translucent conductive layer 22, the power generation layer 23, and the electrode 24 of each power generation cell 20 are supported by a common translucent base material 21.

[0081] When the power generation unit 10 is composed of a single power generation cell 20, the current flowing from the electrode 24 to the translucent conductive layer 22 is taken out via a power distribution line.

[0082] Note that the photovoltaic sheet 7 may include a plurality of power generation units 10. In this case, the plurality of power generation units 10 are arranged in the plane direction of the photovoltaic sheet 7 and are electrically connected in series or in parallel.

[0083] When the power generation unit 10 is composed of a photoelectric conversion unit, in order to connect a plurality of power generation units 10 in series, in two adjacent power generation units 10, 10, the translucent conductive layer 22A at one end of one power generation unit 10 and the electrode 24A at the end of the other power generation unit 10 are connected via a power distribution line. When connecting a plurality of power generation units 10 in parallel, the translucent conductive layers 22A, 22A at the ends of two adjacent power generation units 10, 10 and the electrodes 24A, 24A at the ends of the two adjacent power generation units 10, 10 are respectively connected via a power distribution line.

[0084] When the power generation unit 10 is composed of a single power generation cell 20, in order to connect a plurality of power generation units 10 in series, in two adjacent power generation units 10, 10, the translucent conductive layer 22 of one power generation unit 10 and the electrode 24 of the other power generation unit 10 are connected via a power distribution line. When connecting a plurality of power generation units 10 in parallel, the translucent conductive layers 22, 22 of two adjacent power generation units 10, 10 and the electrodes 24, 24 of the two adjacent power generation units 10, 10 are respectively connected via a power distribution line.

[0085] In addition, regardless of whether the power generation unit 10 is composed of the above-described photoelectric conversion unit or a single power generation cell 20, the distance between adjacent power generation units 10, 10 may be more than 0 mm, preferably 2 mm or more, more preferably 5 mm or more, still more preferably 10 mm or more, and even more preferably 15 mm or more. Also, the distance between adjacent power generation units 10, 10 is preferably 100 mm or less, more preferably 50 mm or less, and even more preferably 20 mm or less.

[0086] (Outer edge portion 5 of the solar power generation device 3) The outer edge portion 5 of the solar power generation device 3 includes the outer peripheral portion 9a of the barrier sheet 9, the outer peripheral portion 8a of the back sheet 8, the sealant 11 filled between the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 8a of the back sheet 8, the seal edge material 12 (not shown in FIG. 2), and the elastic member 6. The elastic member 6 is joined to the outer surface of the outer peripheral portion 9a of the barrier sheet 9.

[0087] (Elastic member 6) The elastic member 6 can be formed of rubber or resin, but is preferably formed of rubber. As the resin for forming the elastic member 6, for example, PP (polypropylene) and PE (polyethylene) can be used. As the rubber for forming the elastic member 6, for example, NBR (nitril-butadiene rubber), SBR (styrene-butadiene rubber), silicone rubber, and butyl rubber can be used. In addition, in order to join the elastic member 6 to the outer surface of the outer peripheral portion of the barrier sheet, for example, an adhesive of a resin composition containing at least one or more selected from vinyl acetate resin, ethylene vinyl acetate resin, epoxy resin, cyanoacrylate resin, acrylic resin, chloroprene rubber, styrene, butadiene rubber, polyurethane resin, silicone resin, and modified silicone resin is used to adhere the elastic member to the outer surface of the outer peripheral portion of the barrier sheet.

[0088] FIG. 4 is a plan view showing a state in which a frame member 50 (FIGS. 1 and 2), which will be described later, is removed from the installation structure 1 according to the present embodiment. In the present embodiment, as shown in FIG. 4, in a plan view, the elastic member 6 forms an annular shape along the periphery of the photovoltaic sheet 7, so that the elastic member 6 is provided over the entire circumference of the outer edge portion 5 of the photovoltaic device 3.

[0089] (Fastener 4) The fastener 4 (FIGS. 1 and 2) includes a frame member 50 and a pressing member 51.

[0090] As shown in FIG. 1, the frame member 50 has an annular shape and is provided around the photovoltaic sheet 7. As shown in FIG. 2, the frame member 50 has a cross-sectional shape in which one width side portion 53 is bent with respect to the other width side portion 54, and the one width side portion 53 is disposed on the outer edge portion 5 of the photovoltaic device 3, and the elastic member 6 is positioned between the one width side portion 53 and the photovoltaic sheet 7, and the other width side portion 54 is disposed outside the photovoltaic device 3.

[0091] The frame member 50 is formed of metal or resin. As the metal for forming the frame member 50, it is preferable to use a hard metal such as aluminum, cast iron, or stainless steel. As the resin for forming the frame member 50, it is preferable to use a hard resin reinforced with carbon fiber or glass fiber. When the frame member 50 is formed of resin, it is preferable to make the color of the frame member 50 black in order to enhance the weather resistance of the frame member 50.

[0092] The pressing member 51 is a member that presses the frame member 50 toward the installation surface 2 side, and the elastic member 6 is in a compressed state by the pressure applied by the pressing member 51 to the frame member 50. In the present embodiment, as shown in FIG. 2(B), the pressing member 51 is composed of a bolt or a stud made of metal or resin in which a small-diameter shaft portion 56 extends from a large-diameter head portion 55. The tip side of the shaft portion 56 that penetrates the other width side portion 54 of the frame member 50 is penetrated under the installation surface 2, and the head portion 55 is pressed against the frame member 50, whereby the frame member 50 is pressed against the installation surface 2 side by the pressing member 51. Note that the tip side of the shaft portion 56 that penetrates the one width side portion 53 of the frame member 50, the elastic member 6, and the outer edge portion 513 may be penetrated under the installation surface 2 to press the head portion 55 against the frame member 50. The number and installation position of the pressing members 51 are appropriately set according to the shape of the frame member 50 and the like. When a plurality of pressing members 51 are provided as in the illustrated example, it is preferable to arrange the pressing members 51 at equal intervals in the circumferential direction of the frame member 50. Further, the pressing member 51 may be constituted by a clamp that sandwiches the frame member 50 and the "object (building material, etc.) constituting the installation surface 2".

[0093] (Function and effect) According to the present embodiment, since the elastic member 6 is provided on the outer edge portion 5 of the solar power generation device 3, the elasticity of the outer edge portion 5 of the solar power generation device 3 can be enhanced. Therefore, the frame member 50 can be brought into close contact with the outer edge portion 5 of the solar power generation device 3 by the force with which the pressing member 51 presses the frame member 50 toward the installation surface 2 side. Thus, the outer edge portion 5 of the solar power generation device 3 can be strongly pressed against the installation surface 2 by the above force. Thereby, it is possible to suppress the generation of a gap between the outer edge portion 5 of the solar power generation device 3 and the installation surface 2, and it is possible to suppress the wind from blowing into the space between the solar power generation device 3 and the installation surface 2. Therefore, it is possible to suppress the vibration of the solar power generation device 3 due to the lifting force of the wind, and it is possible to avoid the situation where the solar power generation device 3 is damaged due to the vibration.

[0094] The present invention is not limited to the above-described embodiments and can be variously modified. Hereinafter, modification examples of the present invention will be described. In the following description, differences from the above-described embodiments will be described, and the same reference numerals will be given to the points common to the above-described embodiments, and the description thereof will be omitted.

[0095] For example, in the above-described embodiment, an example in which the photovoltaic power generation device 3 includes one elastic member 6 having an annular shape is shown. However, the photovoltaic power generation device 3 may include a plurality of elastic members 6 arranged in the circumferential direction of the photovoltaic power generation sheet 7 (each of the plurality of elastic members 6 is arranged between one side portion 53 of the width of the frame member 50 and the photovoltaic power generation sheet 7 and is in a compressed state by the pressure of the pressing member 51). The "arrangement of the plurality of elastic members 6 along the entire circumference of the photovoltaic power generation sheet 7" includes a case where a plurality of elastic members 6 are sequentially arranged in the circumferential direction of the photovoltaic power generation sheet 7 and the ends of two adjacent elastic members 6, 6 abut against each other, or as shown in FIGS. 5 and 6, one or a plurality of elastic members 6 are arranged inside and outside of an annular line K extending in the circumferential direction of the photovoltaic power generation sheet 7, and in a viewing direction "orthogonal to the annular line K and parallel to the outer surface of the photovoltaic power generation sheet 7 (the outer surface of the barrier sheet 9 or the outer surface of the back sheet 8)", a case where the "elastic members 6 arranged inside and outside of the annular line K" are continuous is also included. If the plurality of elastic members 6 are arranged as described above, it is possible to suppress the wind from entering between the one side portion 53 of the width and the outer edge portion 5, so that it is possible to suppress the wind passing between the one side portion 53 of the width and the outer edge portion 5 from entering between the photovoltaic power generation device 3 and the installation surface 2.

[0096] FIG. 5 shows an example in which the photovoltaic power generation device 3 includes elastic members 6A and 6B disposed inside an annular line K1 extending in the circumferential direction of the photovoltaic power generation sheet 7, and elastic members 6C, 6D, 6E, and 6F disposed outside the annular line K1 (the annular line K1 has a rectangular annular shape and is composed of a pair of longitudinal sides extending in the longitudinal direction of the photovoltaic power generation sheet 7 and a pair of transverse sides extending in the width direction of the photovoltaic power generation sheet 7). The elastic members 6A, 6B, 6D, and 6F each extend in the longitudinal direction of the photovoltaic power generation sheet 7. The elastic members 6A and 6D are disposed on one side in the width direction of the photovoltaic power generation sheet 7, and the elastic members 6B and 6F are disposed on the other side in the width direction of the photovoltaic power generation sheet 7. The elastic members 6C and 6E each extend in the width direction of the photovoltaic power generation sheet 7. The elastic member 6C is disposed on one side in the longitudinal direction of the photovoltaic power generation sheet 7, and the elastic member 6E is disposed on the other side in the longitudinal direction of the photovoltaic power generation sheet 7. One end 6Ca in the width direction of the elastic member 6C abuts against one end 6Da in the longitudinal direction of the elastic member 6D, one end 6Cb in the width direction of the elastic member 6C abuts against one end 6Fa in the longitudinal direction of the elastic member 6F, one end 6Ea in the width direction of the elastic member 6E abuts against one end 6Aa in the longitudinal direction of the elastic member 6A, and one end 6Eb in the width direction of the elastic member 6E abuts against one end 6Ba in the longitudinal direction of the elastic member 6B. In a side view when viewed in the width direction, the other end 6Db in the longitudinal direction of the elastic member 6D and the one end 6Ab in the longitudinal direction of the elastic member 6A overlap, and the other end 6Fb in the longitudinal direction of the elastic member 6F and the one end 6Bb in the longitudinal direction of the elastic member 6B overlap. By being arranged as described above, the elastic members 6A, 6E, 6B, 6C, 6D, and 6F are made to be continuous in a viewing direction of "orthogonal to the annular line K1 and parallel to the outer surface of the photovoltaic power generation sheet 7" (for example, the elastic members 6D and 6A are made to be continuous in the above viewing direction by the ends 6Db and 6Ab overlapping as described above).

[0097] FIG. 6 shows an example in which the photovoltaic power generation device 3 includes elastic members 6G and 6H extending in the width direction of the photovoltaic sheet 7 and first to fourth groups 43 to 46 each including a plurality of elastic members 6 arranged in the longitudinal direction of the photovoltaic sheet 7, the second group 44 and the third group 45 are disposed inside an annular line K2 extending along the periphery of the photovoltaic sheet 7, and the elastic members 6G and 6H, the first group 43, and the fourth group 46 are disposed outside the annular line K2 (the annular line K2 has a rectangular annular shape and is composed of a pair of longitudinal sides extending in the longitudinal direction of the photovoltaic sheet 7 and a pair of transverse sides extending in the width direction of the photovoltaic sheet 7). The elastic member 6G is disposed on one side in the longitudinal direction of the photovoltaic sheet 7, the elastic member 6H is disposed on the other side in the longitudinal direction of the photovoltaic sheet 7, the first group 43 and the second group 44 are disposed on one side in the width direction of the photovoltaic sheet 7, and the third group 45 and the fourth group 46 are disposed on the other side in the width direction of the photovoltaic sheet 7. The other longitudinal end 6Ia of the elastic member 6I that is the most on the other side in the longitudinal direction in the first group 43 abuts against the one-width-side end 6Ha of the elastic member 6H, the one longitudinal end 6Ja of the elastic member 6J that is the most on the one side in the longitudinal direction in the second group 44 abuts against the one-width-side end 6Ga of the elastic member 6G, the other longitudinal end 6La of the elastic member 6L that is the most on the other side in the longitudinal direction in the third group 45 abuts against the other-width-side end 6Hb of the elastic member 6H, and the one longitudinal end 6Ma of the elastic member 6M that is the most on the one side in the longitudinal direction in the fourth group 46 abuts against the other-width-side end 6Gb of the elastic member 6G. And in a side view when viewed in the width direction, the other longitudinal ends of the elastic members 6 in the first group 43 excluding the "end 6Ia of the elastic member 6I" overlap with the one longitudinal ends of the elastic members 6 in the second group 44 respectively, the one longitudinal ends of the elastic members 6 in the second group 44 excluding the "end 6Ja of the elastic member 6J" overlap with the other longitudinal ends of the elastic members 6 in the first group 43 respectively, the other longitudinal ends of the elastic members 6 in the third group 45 excluding the "end 6La of the elastic member 6L" overlap with the one longitudinal ends of the elastic members 6 in the fourth group 46 respectively, and the one longitudinal ends of the elastic members 6 in the fourth group 46 excluding the "end 6Ma of the elastic member 6M" overlap with the other longitudinal ends of the elastic members 6 in the third group 45 respectively.The elastic members 6G, 6H and the plurality of elastic members 6 included in the first to fourth groups 43 to 46 are arranged as described above so as to be continuous in the viewing direction "orthogonal to the annular line K2 and parallel to the outer surface of the photovoltaic sheet 7".

[0098] Also, the installation structure of the present invention can be deformed as shown in FIGS. 7 to 11 ((A) and (B) of FIGS. 7, 8, 9, 10, and 11 are cross-sectional views showing a state in which the installation structure according to a modified example of the present invention is cut, and (A) of FIGS. 7, 8, 9, 10, and 11 shows a cross-section corresponding to FIG. 2(A) (a cross-section at a position where the pressing member is not provided), and (B) of FIGS. 7, 8, 9, 10, and 11 shows a cross-section corresponding to FIG. 2(B) (a cross-section at a position where the pressing member is provided)).

[0099] The installation structure 60 shown in FIG. 7 includes an installation surface 2, a photovoltaic power generation device 61 provided on the installation surface 2, and a fixture 4 for fixing the photovoltaic power generation device 61.

[0100] The photovoltaic power generation device 61 includes a photovoltaic sheet 7 and an elastic member 62 having a strength of 4000 MPa or less. The elastic member 62 is provided over the entire circumference of the outer edge portion 63 of the photovoltaic power generation device 61. In order to install the photovoltaic power generation device 61 on the installation surface 2, the frame member 50 of the fixture 4 is arranged on the outer edge portion 63 of the photovoltaic power generation device 61, and the frame member 50 is pressed toward the installation surface 2 side. The power generation unit 10 included in the photovoltaic sheet 7 is provided in a light receiving portion 64 which is a range other than the outer edge portion 63 in the photovoltaic power generation device 61 (a range of the photovoltaic power generation device 61 where sunlight is not blocked by the frame member 50).

[0101] The outer edge portion 63 of the photovoltaic power generation device 61 includes the outer peripheral portion of the photovoltaic power generation sheet 7 and the elastic member 62 disposed inside the outer peripheral portion of the photovoltaic power generation sheet 7. The outer peripheral portion of the photovoltaic power generation sheet 7 includes the outer peripheral portion 9a of the barrier sheet 9, the outer peripheral portion 8a of the back sheet 8, the portion of the sealing agent 11 filled between the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 9a of the back sheet 8, and a sealing edge member 12 that seals between the outer peripheral edge of the barrier sheet 9 and the outer peripheral edge of the back sheet 8 (see FIG. 3, and the illustration of the sealing edge member 12 is omitted in FIG. 7). The elastic member 62 is disposed between the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 8a of the back sheet 8, and the periphery of the elastic member 62 is surrounded by the sealing agent 11.

[0102] The elastic member 62 is formed of the same material as the elastic member 6 shown in the above embodiment. For example, slits are formed in the entire circumference of the photovoltaic power generation sheet 7, and one annular elastic member 62 is fitted into the above slits, or a plurality of elastic members 62 are sequentially fitted into the above slits, so that the elastic member 62 is provided over the entire circumference of the outer edge portion 63 of the photovoltaic power generation device 61. When forming slits in the photovoltaic power generation sheet 7 as described above, after fitting the elastic member 62 into the slits, the first adhesive portion 40 (FIG. 3(A)) of the sealing edge member 12 is adhered to the outer surface of the barrier sheet 9, and the second adhesive portion 42 (FIG. 3(A)) of the sealing edge member 12 is adhered to the outer surface of the back sheet 8, so that the sealing portion 41 (FIG. 3(A)) of the sealing edge member 12 seals between the outer peripheral edge of the barrier sheet 9 and the outer peripheral edge of the back sheet 8. The elastic member 62 may or may not be integrated with the photovoltaic power generation sheet 7 by an adhesive. As the above adhesive, for example, a resin composition containing at least one selected from vinyl acetate resin, ethylene vinyl acetate resin, epoxy resin, cyanoacrylate resin, acrylic resin, chloroprene rubber, styrene, butadiene rubber, polyurethane resin, silicone resin, and modified silicone resin can be used. Also, when manufacturing the photovoltaic power generation sheet 7, the elastic member 62 may be provided over the entire circumference of the outer edge portion 63 of the photovoltaic power generation device 61 by embedding the elastic member 62 inside the outer peripheral portion of the photovoltaic power generation sheet 7 over the entire circumference of the photovoltaic power generation sheet 7.

[0103] The fixing device 4 includes a frame member 50 and a pressing member 51, similar to that shown in the above embodiment. One width side portion 53 of the frame member 50 is disposed on the outer edge portion 63 of the photovoltaic power generation device 61, and the other width side portion 54 of the frame member 50 is disposed outside the photovoltaic power generation device 61. Then, the tip side of the shaft portion 56 of the pressing member 51 penetrating through the other width side portion 54 is penetrated under the installation surface 2, and by pressing the head portion 55 of the pressing member 51 against the frame member 50, the frame member 50 is pressed against the installation surface 2 side by the pressing member 51, and the elastic member 62 is in a compressed state. In addition, the tip side of the shaft portion 56 penetrating through one width side portion 53 of the frame member 50 and the outer edge portion 63 of the photovoltaic power generation device 61 may be penetrated under the installation surface 2 to press the head portion 55 against the frame member 50. The number and installation positions of the pressing members 51 are appropriately set according to the shape of the frame member 50 and the like. When a plurality of pressing members 51 are provided, it is preferable to arrange the pressing members 51 at equal intervals in the circumferential direction of the frame member 50. Further, the pressing member 51 may be constituted by a clamp that sandwiches the frame member 50 and "the object (such as a building material) constituting the installation surface 2".

[0104] According to the installation structure 60 and the photovoltaic power generation device 61 shown in FIG. 7, since the elastic member 62 is provided on the outer edge portion 63 of the photovoltaic power generation device 61, the elasticity of the outer edge portion 63 of the photovoltaic power generation device 61 can be enhanced. Therefore, the frame member 50 can be brought into close contact with the outer edge portion 63 of the photovoltaic power generation device 61 by the force of the pressing member 51 pressing the frame member 50 against the installation surface 2 side, so that the outer edge portion 63 of the photovoltaic power generation device 61 can be strongly pressed against the installation surface 2 by the above force. Thereby, it is possible to suppress the generation of a gap between the outer edge portion 63 and the installation surface 2, and thus it is possible to suppress the wind from blowing into the space between the photovoltaic power generation device 3 and the installation surface 2. Therefore, it is possible to suppress the vibration of the photovoltaic power generation device 3 due to the lifting force caused by the wind, and thus it is possible to avoid the situation where the photovoltaic power generation device 3 is damaged due to vibration.

[0105] Further, by disposing the elastic member 62 inside the photovoltaic sheet 7 (specifically, between the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 8a of the back sheet 8), the labor required for adjusting the position of the elastic member 62 can be reduced.

[0106] The installation structure 70 shown in FIG. 8 includes an installation surface 2, a photovoltaic power generation device 71, and a fixture 72 for fixing the photovoltaic power generation device 71. Elastic members 74 and 75 having an elastic modulus of 4000 MPa or less are provided over the entire circumference of the outer edge portion 73 of the photovoltaic power generation device 61.

[0107] The fixture 72 includes a frame member 76 and a pressing member 77. The frame member 76 is formed of the same material as the frame member 50 shown in the above embodiment and has an annular shape in plan view. The pressing member 77 is a member that presses the frame member 76 toward the installation surface 2 side. In order to install the photovoltaic power generation device 71 on the installation surface 2, the entire frame member 76 is disposed on the outer edge portion 73 of the photovoltaic power generation device 71, and the frame member 76 is pressed toward the installation surface 2 side by the pressing member 77.

[0108] The photovoltaic power generation device 71 includes a photovoltaic sheet 7 and the above-described elastic members 74 and 75 joined to the outer surface of the outer peripheral portion of the photovoltaic sheet 7. The power generation portion 10 included in the photovoltaic sheet 7 is provided in a light receiving portion 78 that is a range other than the outer edge portion 73 in the photovoltaic power generation device 71 (a range of the photovoltaic power generation device 71 where sunlight is not blocked by the frame member 76).

[0109] The outer edge portion 73 of the photovoltaic power generation device 71 includes the outer peripheral portion of the photovoltaic sheet 7 and the elastic members 74 and 75. The outer peripheral portion of the photovoltaic sheet 7 includes the outer peripheral portion 9a of the barrier sheet 9, the outer peripheral portion 8a of the back sheet 8, a portion of the sealing agent 11 filled between the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 9a of the back sheet 8, and a sealing edge member 12 that seals between the outer peripheral edge of the barrier sheet 9 and the outer peripheral edge of the back sheet 8 (see FIG. 3; the sealing edge member 12 is not shown in FIG. 8).

[0110] The outer peripheral portion of the above-described photovoltaic sheet 7 has a wavy shape in which opposite curved portions 7a that curve convexly toward the side opposite to the installation surface 2 and installation surface side curved portions 7b that curve convexly toward the installation surface 2 alternate with each other.

[0111] The elastic members 74 and 75 are formed of the same material as the elastic member 6 shown in the above embodiment. By arranging one or a plurality of elastic members 74 in the circumferential direction of the photovoltaic sheet 7 between the opposite curved portion 7a and the installation surface 2, the elastic members 74 are provided over the entire circumference of the outer edge portion 73 of the photovoltaic device 71. By arranging one or a plurality of elastic members 75 in the circumferential direction of the photovoltaic sheet 7 between the installation surface side curved portion 7b and the frame member 76, the elastic members 75 are provided over the entire circumference of the outer edge portion 73 of the photovoltaic device 71.

[0112] The elastic member 74 is joined to the outer surface of the opposite curved portion 7a (more specifically, the elastic member 74 is joined to the outer surface of the back sheet 8 that constitutes the outer surface of the opposite curved portion 7a). The elastic member 75 is joined to the outer surface of the installation surface side curved portion 7b (more specifically, the elastic member 75 is joined to the outer surface of the barrier sheet 9 that constitutes the outer surface of the installation surface side curved portion 7b). To achieve the above joining, for example, an adhesive of a resin composition containing at least one or more selected from vinyl acetate resin, ethylene vinyl acetate resin, epoxy resin, cyanoacrylate resin, acrylic resin, chloroprene rubber, styrene, butadiene rubber, polyurethane resin, silicone resin, and modified silicone resin is used to adhere the elastic member 74 to the outer surface of the opposite curved portion 7a and the elastic member 75 to the outer surface of the installation surface side curved portion 7b.

[0113] Each of the elastic members 74 and 75 is in a compressed state by the pressure applied by the pressing member 77 to the frame member 76. In the illustrated example, the pressing member 77 is composed of a bolt or a stud made of metal or resin with a large-diameter head 79 and a small-diameter shaft portion 80 extending therefrom. The tip side of the shaft portion 80 penetrating through the frame member 76, the elastic member 75, and the installation surface side bending portion 7b is penetrated under the installation surface 2, and the head 79 is pressed against the frame member 76, whereby the frame member 76 is pressed against the installation surface 2 side. Note that the tip side of the shaft portion 80 penetrating through the frame member 76, the opposite side bending portion 7a, and the elastic member 74 may be penetrated under the installation surface 2 to press the head 79 against the frame member 76. The number and installation positions of the pressing members 77 are appropriately set according to the shape or size of the frame member 76 or the like. When a plurality of pressing members 77 are provided, it is preferable to arrange the pressing members 77 at equal intervals in the circumferential direction of the frame member 76. Further, the pressing member 77 may be composed of a clamp that sandwiches the frame member 76 and the "object constituting the installation surface 2".

[0114] When a plurality of bending portions 7a and 7b are formed on the outer peripheral portion of the solar power generation sheet 7, the solar power generation device 71 includes one or a plurality of elastic members 74 arranged in the circumferential direction of the solar power generation sheet 7 at each between the opposite side bending portion 7a and the installation surface 2, and one or a plurality of elastic members 75 arranged in the circumferential direction of the solar power generation sheet 7 at each between the installation surface side bending portion 7b and the frame member 76.

[0115] When arranging one elastic member 74 between the opposite side bending portion 7a and the installation surface 2, from the viewpoint of suppressing the blowing of wind between the solar power generation sheet 7 and the installation surface 2, the shape of the elastic member 74 is an annular shape.

[0116] When a plurality of elastic members 74 are arranged between the opposite curved portion 7a and the installation surface 2, from the viewpoint of suppressing the inflow of wind between the photovoltaic sheet 7 and the installation surface 2, a plurality of elastic members 74 are sequentially arranged in the circumferential direction of the photovoltaic sheet 7, and the ends of two adjacent elastic members 74, 74 are abutted against each other. Alternatively, one or a plurality of elastic members 74 are arranged inside and outside an annular line extending in the circumferential direction of the photovoltaic sheet 7, and in a view direction "perpendicular to the annular line and parallel to the outer surface of the photovoltaic sheet 7", the "elastic members 74 arranged inside and outside the annular line" are in a continuous state.

[0117] When one elastic member 75 is arranged between the installation surface side curved portion 7b and the frame member 76, from the viewpoint of bringing the entire circumference of the frame member 76 and the entire circumference of the photovoltaic sheet 7 into close contact with the elastic member 75, the shape of the elastic member 74 is annular.

[0118] When a plurality of elastic members 74 are arranged between the installation surface side curved portion 7b and the frame member 76, from the viewpoint of bringing the entire circumference of the frame member 76 and the entire circumference of the photovoltaic sheet 7 into close contact with the elastic member 75, a plurality of elastic members 75 are sequentially arranged in the circumferential direction of the photovoltaic sheet 7, and the ends of two adjacent elastic members 75, 75 are abutted against each other. Alternatively, one or a plurality of elastic members 75 are arranged inside and outside an annular line extending in the circumferential direction of the photovoltaic sheet 7, and in a view direction "perpendicular to the annular line and parallel to the outer surface of the photovoltaic sheet 7", the "elastic members 75 arranged inside and outside the annular line" are in a continuous state.

[0119] According to the installation structure 70 and the photovoltaic power generation device 71 shown in FIG. 8, elastic members 74 and 75 are provided at the outer edge portion 73 of the photovoltaic power generation device 71, so that the elasticity of the outer edge portion 73 can be enhanced. Therefore, the pressing member 77 can bring the frame member 76 into close contact with the outer edge portion 73 of the photovoltaic power generation device 71 by the force pressing the frame member 76 toward the installation surface 2 side, so that the outer edge portion 73 can be strongly pressed against the installation surface 2 by the above force. Thereby, it is possible to suppress the generation of a gap between the outer edge portion 73 and the installation surface 2, so that it is possible to suppress the wind from blowing into the space between the photovoltaic power generation device 71 and the installation surface 2. Therefore, it is possible to suppress the vibration of the photovoltaic power generation device 71 due to the lift force of the wind, so that it is possible to avoid the situation where the photovoltaic power generation device 3 is damaged due to vibration.

[0120] Further, an elastic member 74 is disposed between the opposite bending portion 7a of the photovoltaic power generation sheet 7 and the installation surface 2, and an elastic member 75 is disposed between the installation surface side bending portion 7b of the photovoltaic power generation sheet 7 and the frame member 76. Thus, even if the force with which the pressing member 51 presses the frame member 50 is increased, the elastic members 74 and 75 can suppress damage to the photovoltaic power generation sheet 7.

[0121] The installation structure 90 shown in FIG. 9 includes an installation surface 2, a photovoltaic power generation device 91 provided on the installation surface 2, and a fixture 4 for fixing the photovoltaic power generation device 91.

[0122] The photovoltaic power generation device 91 includes a photovoltaic power generation sheet 7 and an elastic member 92 having an elastic modulus of 4000 MPa or less, and the elastic member 92 is provided over the entire circumference of the outer edge portion 93 of the photovoltaic power generation device 91. In order to install the photovoltaic power generation device 91 on the installation surface 2, the frame member 50 of the fixture 4 is disposed on the outer edge portion 93 of the photovoltaic power generation device 61, and the frame member 50 is pressed toward the installation surface 2 side. The power generation unit 10 included in the photovoltaic power generation sheet 7 is provided in a light receiving portion 94 which is a range other than the outer edge portion 93 in the photovoltaic power generation device 91 (a range of the photovoltaic power generation device 91 where sunlight is not blocked by the frame member 50).

[0123] The elastic member 92 is formed of the same material as the elastic member 6 shown in the above embodiment. The outer edge portion 93 of the photovoltaic power generation device 91 is constituted by the elastic member 92 joined to the outer peripheral portion of the photovoltaic power generation sheet 7 so as to surround the photovoltaic power generation sheet 7. Joining the elastic member 92 to the outer peripheral portion of the photovoltaic power generation sheet 7 as described above can be realized, for example, by fitting the outer peripheral portion of the photovoltaic power generation sheet 7 into a slit formed on the inner peripheral surface of a single annular elastic member 62, or by fitting the outer peripheral portion of the photovoltaic power generation sheet 7 into slits formed in each of a plurality of annularly arranged elastic members 62. The elastic member 92 may or may not be integrated with the photovoltaic power generation sheet 7 by an adhesive. As the above adhesive, for example, a resin composition containing at least one or more selected from vinyl acetate resin, ethylene vinyl acetate resin, epoxy resin, cyanoacrylate resin, acrylic resin, chloroprene rubber, styrene, butadiene rubber, polyurethane resin, silicone resin, and modified silicone resin can be used.

[0124] The fixture 4 includes a frame member 50 and a pressing member 51, similar to those shown in the above embodiment. One width side portion 53 of the frame member 50 is disposed on the elastic member 92 that constitutes the outer edge portion 93 of the photovoltaic power generation device 91, and the other width side portion 54 of the frame member 50 is disposed outside the photovoltaic power generation device 91. Then, the tip side of the shaft portion 56 of the pressing member 51 penetrating through the other width side portion 54 is penetrated under the installation surface 2, and by pressing the head portion 55 of the pressing member 51 against the frame member 50, the frame member 50 is pressed against the installation surface 2 side by the pressing member 51, and the elastic member 92 is in a compressed state. Note that the tip side of the shaft portion 56 penetrating through one width side portion 53 of the frame member 50 and the outer edge portion 93 of the photovoltaic power generation device 91 may be penetrated under the installation surface 2 to press the head portion 55 against the frame member 50. The number and installation positions of the pressing members 51 are appropriately set according to the shape of the frame member 50 and the like. When providing a plurality of pressing members 51, it is preferable to arrange the pressing members 51 at equal intervals in the circumferential direction of the frame member 50. Further, the pressing member 51 may be constituted by a clamp that sandwiches the frame member 50 and the "object (such as a building material) constituting the installation surface 2".

[0125] According to the installation structure 90 and the photovoltaic power generation device 91 shown in FIG. 9, since the outer edge portion 93 of the photovoltaic power generation device 91 is constituted by the elastic member 92, the elasticity of the outer edge portion 93 can be enhanced. Therefore, the pressing member 51 can bring the frame member 50 into close contact with the outer edge portion 93 by the force of pressing the frame member 50 toward the installation surface 2 side, so that the outer edge portion 93 can be strongly pressed against the installation surface 2 by the above force. Thereby, it is possible to suppress the generation of a gap between the outer edge portion 93 and the installation surface 2, so that it is possible to suppress the wind from blowing into the space between the photovoltaic power generation device 91 and the installation surface 2. Therefore, it is possible to suppress the vibration of the photovoltaic power generation device 91 due to the lifting force of the wind, and thus it is possible to avoid the situation where the photovoltaic power generation device 91 is damaged due to vibration.

[0126] The installation structure 100 shown in FIG. 10 includes an installation surface 2, a photovoltaic power generation device (hereinafter referred to as the photovoltaic power generation device 7) constituted by a photovoltaic power generation sheet 7 and provided on the installation surface 2, and a fixture 4 for fixing the photovoltaic power generation device 7. In order to install the photovoltaic power generation device 7 on the installation surface 2, the frame member 50 of the fixture 4 is disposed on the outer edge portion 101 of the photovoltaic power generation device 61, and the frame member 50 is pressed toward the installation surface 2 side. The power generation portion 10 included in the photovoltaic power generation sheet 7 is provided in the light receiving portion 102 which is a range other than the outer edge portion 101 in the photovoltaic power generation device 7 (the range of the photovoltaic power generation device 7 where sunlight is not blocked by the frame member 50).

[0127] The outer edge portion 101 of the photovoltaic power generation device 7 includes, as an elastic member having an elastic modulus of 4000 MPa or less, the outer peripheral portion 9a of the barrier sheet 9, the outer peripheral portion 8a of the back sheet 8, and the portion of the sealant 11 filled between the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 8a of the back sheet 8, and a sealant edge member 12 (see FIG. 3, the illustration of the sealant edge member 12 is omitted in FIG. 10) that seals between the outer peripheral edge of the barrier sheet 9 and the outer peripheral edge of the back sheet 8. In order to facilitate the manufacture of the photovoltaic power generation device 7, it is preferable that the barrier sheet 9, the back sheet 8, and the sealant 12 all have an elastic modulus of 4000 MPa or less.

[0128] The fixing device 4 includes a frame member 50 and a pressing member 51, similar to that shown in the above embodiment. One width side portion 53 of the frame member 50 is disposed on the outer edge portion 63 of the photovoltaic power generation device 7, and the other width side portion 54 of the frame member 50 is disposed outside the photovoltaic power generation device 7. Then, the tip side of the shaft portion 56 of the pressing member 51 penetrating through the other width side portion 54 is penetrated under the installation surface 2, and the head portion 55 of the pressing member 51 is pressed against the frame member 50, so that the frame member 50 is pressed against the installation surface 2 side by the pressing member 51, and the outer edge portion 63 of the photovoltaic power generation device 7 is in a compressed state. In addition, the tip side of the shaft portion 56 penetrating through one width side portion 53 of the frame member 50 and the outer edge portion 63 of the photovoltaic power generation device 61 may be penetrated under the installation surface 2 to press the head portion 55 against the frame member 50. The number and installation position of the pressing members 51 are appropriately set according to the shape of the frame member 50 and the like. When a plurality of pressing members 51 are provided, it is preferable to arrange the pressing members 51 at equal intervals in the circumferential direction of the frame member 50. Further, the pressing member 51 may be constituted by a clamp that sandwiches the frame member 50 and the "object (such as a building material) constituting the installation surface 2".

[0129] According to the installation structure 100 and the photovoltaic power generation device 7 shown in FIG. 10, since the elastic modulus of the member constituting the outer edge portion 101 of the photovoltaic power generation device 7 is 4000 MPa or less, the pressing member 51 can bring the frame member 50 into close contact with the outer edge portion 101 by the force pressing the frame member 50 against the installation surface 2 side. As a result, the outer edge portion 101 can be strongly pressed against the installation surface 2 by the above force, so that the generation of a gap between the outer edge portion 101 and the installation surface 2 can be suppressed. Therefore, the intrusion of wind between the photovoltaic power generation device 7 and the installation surface 2 can be suppressed, and the vibration of the photovoltaic power generation device 7 due to the lifting force of the wind can be suppressed. For this reason, the situation where the photovoltaic power generation device 7 is damaged due to vibration can be avoided.

[0130] The above-described installation structures 1, 60, 70, 90, 100 and the photovoltaic power generation devices 3, 61, 71, 91, 7, from the viewpoint of strongly adhering the frame member to the outer edge portion of the photovoltaic power generation device, preferably have the thickness of the outer edge portions 5, 63, 73, 93, 101 of the photovoltaic power generation devices 3, 61, 71, 91, 7 being greater than the thickness of the light receiving portions 13, 64, 78, 94, 102 of the photovoltaic power generation devices 3, 61, 71, 91, 7, and more preferably the thickness of the outer edge portions 5, 63, 73, 93, 101 being 1.1 times or more the thickness of the light receiving portions 13, 64, 78, 94, 102 (for example, FIG. 11 shows a modified example of the installation structure 100 and the photovoltaic power generation device 100 in which the thickness of the outer edge portion 101 is made greater than the thickness of the light receiving portion 102).

[0131] Also, in the above-described examples, the installation structures 1, 60, 70, 90, 100 included the annular frame members 50, 76, but the installation structures 1, 60, 70, 90, 100 may include a frame member composed of a plurality of frames arranged in the circumferential direction of the photovoltaic power generation sheet 7 (FIG. 12 shows an example in which the frame member 50 included in the installation structure 1 is composed of a plurality of frames 50a arranged in the circumferential direction of the photovoltaic power generation sheet 7). In the above case, in the installation structures 1, 60, 70, 90, 100, a part or the whole of each frame is arranged on the outer edge portion of the photovoltaic power generation device, a pressing member is provided for each frame, and each pressing member is configured to press the corresponding frame toward the installation surface 2 side.

[0132] In the above-described installation structures 1, 60, 70, 90, 100 and the photovoltaic power generation devices 3, 61, 71, 91, 7, the sealing edge material 12 is not necessarily required and may not be provided. For example, the edge portion of the barrier sheet 9 may be bent toward the back sheet 8 side, and the bent tip may be joined to the back sheet 8. Alternatively, the edge portion of the back sheet 8 may be bent toward the barrier sheet 9 side, and the bent tip may be joined to the barrier sheet 9. By doing so, the sealing edge material 12 becomes unnecessary. In the installation structure 100 and the photovoltaic power generation device 7 shown in FIGS. 10 and 11, when the sealing edge material 12 is omitted as described above, the outer edge portion 101 of the photovoltaic power generation device 7 is an elastic member having an elastic modulus of 4000 MPa or less, and includes the outer peripheral portion 9a of the barrier sheet 9, the outer peripheral portion 8a of the back sheet 8, and the portion 11a of the sealing agent 11 filled between the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 8a of the back sheet 8.

[0133] Furthermore, in the above-described installation structures 1, 60, 70, 90, 100 and the photovoltaic power generation devices 3, 61, 71, 91, 7, the sealing agent 11 may also be omitted in addition to the sealing edge material 12. In this case, in the photovoltaic power generation sheet 7, for example, only the power generation portion 10 is disposed between the barrier sheet 9 and the back sheet 8, and the barrier sheet 9 and the back sheet 8 are each adhered to the power generation portion 10. In the installation structure 100 and the photovoltaic power generation device 7 shown in FIGS. 10 and 11, when the sealing agent 11 and the sealing edge material 12 are omitted as described above, the outer edge portion 101 of the photovoltaic power generation device 7 is an elastic member having an elastic modulus of 4000 MPa or less, and includes the outer peripheral portion 9a of the barrier sheet 9 and the outer peripheral portion 8a of the back sheet 8.

[0134] In the above-described installation structures 1, 60, 70, 90, 100 and the photovoltaic power generation devices 3, 61, 71, 91, 7, from the viewpoint of suppressing the blowing-in of wind, the compression rate of the elastic members 6, 62, 74, 75, 92 and the elastic member constituting the outer edge portion 101 is preferably 1% or more, more preferably 3% or more, still more preferably 5% or more, and even more preferably 10% or more. Further, from the viewpoint of suppressing the expansion of the compression set of the elastic member due to excessive compression and the deterioration of the elastic member, the compression rate of the elastic members 6, 62, 74, 75, 92 and the elastic member constituting the outer edge portion 101 is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, and even more preferably 25% or less. The above compression rate is a value (compression displacement / total thickness) obtained by dividing the compression width (compression displacement) of the elastic member by the "total thickness obtained by summing the thickness of the photovoltaic power generation device 3 before compression and the thickness of the elastic member before compression".

[0135] Also, the thickness of the elastic members 6, 62, 74, 75, 92 before compression and the elastic member constituting the outer edge portion 101 is preferably 1 mm or more, more preferably 2.5 mm or more, still more preferably 5 mm or more, still more preferably 10 mm or more, still more preferably 15 mm or more, and still more preferably 20 mm or more. Also, the thickness of the elastic members 6, 62, 74, 75, 92 before compression and the elastic member constituting the outer edge portion 101 is preferably 100 mm or less, more preferably 50 mm or less, still more preferably 40 mm or less, and still more preferably 30 mm or less. When the thickness of the elastic members 6, 62, 74, 75, 92 before compression and the elastic member constituting the outer edge portion 101 is set as described above, from the viewpoint of suppressing the blowing-in of wind, the compression width (compression displacement) of the elastic member constituting the elastic members 6, 62, 74, 75, 92 and the outer edge portion 101 is preferably 0.1 mm or more, more preferably 1 mm or more, still more preferably 5 mm or more, still more preferably 10 mm or more, and still more preferably 20 mm or more. Also, from the viewpoint of securing a space (height) for arranging the power generation unit 10 in the photovoltaic power generation device, the compression width (compression displacement) of the elastic member constituting the elastic members 6, 62, 74, 75, 92 and the outer edge portion 101 is preferably 100 mm or less, more preferably 75 mm or less, still more preferably 50 mm or less, still more preferably 40 mm, and still more preferably 30 mm or less.

[0136] Also, in order to improve the handleability during construction, the longitudinal elastic modulus of the elastic members 6, 62, 74, 75, 92 and the elastic member constituting the outer edge portion 101 is preferably 0.1 MPa or more, more preferably 10 MPa or more, and still more preferably 100 MPa or more.

[0137] From the perspective of suppressing the intrusion of wind, the longitudinal elastic modulus of the elastic members 6, 62, 74, 75, 92 and the elastic member constituting the outer edge portion 101 is 4000 MPa or less, more preferably 2000 MPa or less, still more preferably 1000 MPa or less, and even more preferably 500 MPa or less. Also from the same perspective, it is preferable that the longitudinal elastic modulus of the elastic members 6, 62, 74, 75, 92 and the elastic member constituting the outer edge portion 101 is lower than the longitudinal elastic modulus of the frame member. For example, the longitudinal elastic modulus of the elastic members 6, 62, 74, 75, 92 and the elastic member constituting the outer edge portion 101 is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, even more preferably 25%, even more preferably 10% or less, and even more preferably 5% or less with respect to the longitudinal elastic modulus of the frame member.

Explanation of Reference Numerals

[0138] 1, 60, 70, 90, 100 Installation Structure 2 Installation Surface 3, 7, 61, 71, 91 Solar Power Generation Device 4, 72 Fixture 5, 63, 73, 93, 101 Outer Edge Portion of Solar Power Generation Device 6, 62, 74, 75, 92 Elastic Member 7 Solar Power Generation Sheet 10 Power Generation Unit 13, 64, 78, 94, 102 Light-Receiving Portion of Solar Power Generation Device 50, 76 Frame Member 51, 77 Pressing Member

Claims

1. A solar power generation device including a power generation unit that generates electricity by the incidence of light, and having a frame member disposed on an outer edge portion for installation on an installation surface, and the frame member being pressed toward the installation surface side. A solar power generation device in which an elastic member having an elastic modulus of 4000 MPa or less is provided over the entire circumference of the outer edge portion.

2. The solar power generation device according to claim 1, wherein the power generation unit is provided in a light receiving portion which is a range other than the outer edge portion.

3. The solar power generation device according to claim 1, wherein the thickness of the outer edge portion is larger than the thickness of the light receiving portion which is a range other than the outer edge portion.

4. The solar power generation device according to claim 3, wherein the thickness of the outer edge portion is 1.1 times or more the thickness of the light receiving portion.

5. An installation surface, The solar power generation device according to claim 1 provided on the installation surface, And a fixture for fixing the solar power generation device, The fixture includes, A frame member provided around the solar power generation device and disposed on the outer edge portion of the solar power generation device, And a pressing member for pressing the frame member toward the installation surface side, an installation structure of a solar power generation device.

6. The solar power generation device includes a solar power generation sheet including the power generation unit, The elastic member is joined to the outer peripheral portion of the solar power generation sheet, or disposed inside the outer peripheral portion of the solar power generation sheet, or constituted by a member constituting the outer peripheral portion of the solar power generation sheet, The installation structure of the solar power generation device according to claim 5, wherein the bending strength of the solar power generation sheet is 10 MPa or more and 200 MPa or less.

7. The solar power generation device includes a solar power generation sheet including the power generation unit, The elastic member is joined to the outer peripheral portion of the solar power generation sheet, or is disposed inside the outer peripheral portion of the solar power generation sheet, or is constituted by a member constituting the outer peripheral portion of the solar power generation sheet. The installation structure of the solar power generation device according to claim 5, wherein the bending elastic modulus of the solar power generation sheet is 500 MPa or more and 10,000 MPa or less.

8. The solar power generation device includes a solar power generation sheet including the power generation unit. The elastic member is joined to the outer peripheral portion of the solar power generation sheet, or is disposed inside the outer peripheral portion of the solar power generation sheet, or is constituted by a member constituting the outer peripheral portion of the solar power generation sheet. The installation structure of the solar power generation device according to claim 5, wherein the bending radius of the solar power generation sheet is 10 cm or less.

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