Fixture, solar power generation device installation structure

Abstract

To provide a fixture capable of restraining wind having passed between a frame member and an installation surface from blowing into a gap between a solar power generation device and the installation surface, so that vibration which might be caused on the solar power generation device due to the lift force of the wind can be inhibited.SOLUTION: A fixture 4 in this invention is used to fix a solar power generation device 3 to be installed on an installation surface 2, comprising a frame member 50 that is arranged on the periphery of the solar power generation device 3 and placed on the outer marginal part 13 of the solar power generation device 3, a holding member 51 that presses down the frame member 50 towards the installation surface 2, and an elastic member 52 that is arranged between the outer marginal part 13 of the solar power generation device 3 and the frame member 50 on the whole circumference of the solar power generation device 3.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fixture for fixing a photovoltaic power generation device and an installation structure of a 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, as shown in FIG. 14(A), the frame member 100 is arranged in contact with the outer edge portion 102 of the photovoltaic power generation device 101, and the frame member 100 is pressed against the installation surface 104 side by a pressing member 103 such as a bolt, thereby fixing the photovoltaic power generation device 101.

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 101 has poor elasticity due to factors such as the thinness of the photovoltaic power generation device 101, the frame member 100 cannot be brought into close contact with the outer edge portion 102 of the photovoltaic power generation device 101, and thus the photovoltaic power generation device 101 may not be strongly pressed against the installation surface. In this case, the wind 200 (FIG. 14(B)) blows into the space between the photovoltaic power generation device 101 and the installation surface 104, and the photovoltaic power generation device vibrates violently due to the lifting force of the wind 200, resulting in damage to the photovoltaic power generation device 101.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a fixture and an installation structure of a photovoltaic power generation device that can suppress the blowing of wind between the photovoltaic power generation device and the installation surface and can suppress the vibration of the photovoltaic power generation device due to the lifting force of the wind.

Means for Solving the Problem

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

[0007] Item 1. A fixture for fixing a photovoltaic power generation device provided on an installation surface, a frame member provided around the photovoltaic power generation device and disposed on the outer edge portion of the photovoltaic power generation device; a pressing member for pressing the frame member toward the installation surface side; and one or more elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge portion of the photovoltaic power generation device and the frame member or the installation surface.

[0008] Item 2. The fixture according to Item 1, comprising one or more first elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge portion of the photovoltaic power generation device and the frame member and provided integrally with the frame member.

[0009] Item 3. The fixture according to Item 1 or 2, comprising one first elastic member disposed along the entire circumference of the photovoltaic power generation device between the outer edge portion of the photovoltaic power generation device and the installation surface, wherein the first elastic member is annular.

[0010] Item 4. The fixture according to Item 1 or 2, comprising a plurality of first elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge portion of the photovoltaic power generation device and the installation surface, wherein the first elastic members are respectively disposed inside and outside an annular line extending along the periphery of the photovoltaic power generation device, and in a viewing direction orthogonal to the annular line and parallel to the front or back surface of the photovoltaic power generation device, the first elastic members disposed inside and outside the annular line are continuous.

[0011] Item 5. The fixture according to claim 1 or 2, comprising one or more first elastic members that are arranged along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the frame member, and having a protruding portion that protrudes toward the photovoltaic power generation device on the surface facing the photovoltaic power generation device.

[0012] Item 6. The fixture according to claim 5, wherein the protruding portion has a shape that inclines outward of the photovoltaic power generation device as it approaches the photovoltaic power generation device side.

[0013] Item 7. The fixture according to claim 5, wherein the protruding portion has a shape that inclines inward of the photovoltaic power generation device as it approaches the photovoltaic power generation device side.

[0014] Item 8. The fixture comprising one second elastic member that is arranged along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the installation surface. The second elastic member has an annular shape, and the fixture according to any one of claims 1 to 7.

[0015] Item 9. The fixture comprising a plurality of second elastic members that are arranged along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the installation surface. The first elastic members are respectively arranged inside and outside an annular line extending along the periphery of the photovoltaic power generation device. In a viewing direction that is orthogonal to the annular line and parallel to the front or back surface of the photovoltaic power generation device, the second elastic members arranged inside and outside the annular line are continuous, and the fixture according to any one of claims 1 to 7.

[0016] Item 10. The fixture according to claim 1, comprising one or more first elastic members that are arranged along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the frame member, and one or more second elastic members that are arranged along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the installation surface.

[0017] Item 11. The fixture according to item 10, further comprising one or more third elastic members that connect the first elastic member and the second elastic member and are arranged along the entire circumference of the photovoltaic device outside the photovoltaic device.

[0018] Item 12. The outer edge portion of the photovoltaic device has a wavy shape in which an opposite curved portion that curves convexly toward the side opposite to the installation surface and an installation surface side curved portion that curves convexly toward the installation surface side alternate with each other, and one or more first elastic members arranged along the entire circumference of the photovoltaic device between the opposite curved portion and the installation surface, and one or more second elastic members arranged along the entire circumference of the photovoltaic device between the installation surface side curved portion and the frame member. The fixture according to item 1.

[0019] Item 13. The frame member is composed of a plurality of frames arranged in the circumferential direction of the photovoltaic device, each of the frames is arranged on the outer edge portion of the photovoltaic device, a pressing member is provided for each of the frames, and each of the pressing members presses the corresponding frame toward the installation surface side. The fixture according to any one of items 1 to 12.

[0020] Item 14. An installation structure of a photovoltaic device, comprising an installation surface, a photovoltaic device provided on the installation surface, and a fixture for fixing the photovoltaic device, wherein the fixture includes a frame member provided around the photovoltaic device and arranged on the outer edge portion of the photovoltaic device, a pressing member that presses the frame member toward the installation surface side, and one or more elastic members arranged along the entire circumference of the photovoltaic device between the outer edge portion of the photovoltaic device and the frame member or the installation surface.

[0021] Item 15. The installation structure of the photovoltaic power generation device according to Item 14, wherein the bending strength of the photovoltaic power generation device is 10 MPa or more and 200 MPa or less.

[0022] Item 16. The installation structure of the photovoltaic power generation device according to Item 14 or 15, wherein the bending modulus of elasticity of the photovoltaic power generation device is 500 MPa or more and 10,000 MPa or less.

[0023] Item 17. The installation structure of the photovoltaic power generation device according to any one of Items 14 to 16, wherein the bending radius of the photovoltaic power generation device is 10 cm or less.

Advantages of the Invention

[0024] According to the present invention, it is possible to suppress the blowing of wind 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 lifting force of the wind.

Brief Description of the Drawings

[0025]

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

Figure 14

Embodiments for Carrying Out the Invention

[0026] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing the 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 the state where the installation structure 1 is cut along the line A-A of FIG. 1. FIG. 2(B) is a cross-sectional view showing the state where the installation structure 1 is cut along the line B-B of FIG. 1.

[0027] The installation structure 1 according to this embodiment includes an installation surface 2, a solar power generation device 3 provided on the installation surface 2, and a fixture 4 for fixing the solar power generation device 3.

[0028] The installation surface 2 is constituted by the surface of a building material. Examples of the building material include a roofing material, a wall material (such as a metal siding material, a ceramic siding material, a sandwich panel, etc.), a partition, a door material, a fence material, a floor material, etc. Examples of the roofing material include a roofing material used for a folded plate roof, a slate roof, a roof deck, a tile batten roof, a standing seam roof, etc. The roof may be a vertical tile roof or a horizontal tile roof. Note that the present invention does not limit the member having the installation surface 2 to the above building materials, 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 flat surface, 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.

[0029] (Solar power generation device 3) FIG. 3(A) is a cross-sectional view showing the state where the solar power generation device 3 is cut. FIG. 3(B) is an enlarged view of the a portion of FIG. 3(A). FIG. 3(C) is a cross-sectional view showing the state where the power generation unit 10 is cut along the C-C line of FIG. 3(A).

[0030] The solar power generation device 3 has a power generation unit 10 and a sealing agent 11 disposed between a barrier sheet 7 constituting the front surface 6 and a back sheet 9 constituting the back surface 8, and the sealing agent 11 is filled around the power generation unit 10. A sealing edge material 12 for sealing between the barrier sheet 7 and the back sheet 9 is provided at the outer peripheral edge of the solar power generation device 3. The solar power generation device 3 generates power in the power generation unit 10 when the light irradiated on the front surface 6 enters the power generation unit 10.

[0031] The photovoltaic device 3 is sheet-shaped. As used in this specification, "sheet-shaped" means a shape in which the thickness of the object is 10% or less of 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. 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, film-like, foil-like, film-like, etc. are also included in "sheet-shaped".

[0032] The photovoltaic device 3 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 device 3, and the photovoltaic device 3 may be, for example, substantially circular in a plan view, elliptical in a plan view, polygonal in a plan view, or the like.

[0033] The photovoltaic device 3 has flexibility (the property that the object can be bent). In the present invention, for the photovoltaic device 3 to have flexibility means that the photovoltaic device 3 has a bending strength of 10 MPa or more, or that the photovoltaic device 3 has a bending modulus of elasticity of 100 MPa or more. The bending strength of the photovoltaic device 3 is more preferably 20 MPa or more, and even more preferably 50 MPa or more. Also, the bending strength of the photovoltaic device 3 is preferably 200 MPa or less, more preferably 150 MPa or less, and even more preferably 50 MPa or less. Also, the bending modulus of elasticity of the photovoltaic device 3 is more preferably 500 MPa or more. Also, the bending modulus of elasticity of the photovoltaic device 3 is preferably 10,000 MPa or less, more preferably 5,000 MPa or less. When evaluating the flexibility of the photovoltaic device 3 by the bending strength, the bending modulus of elasticity may not be included in the above range. When evaluating the flexibility of the photovoltaic device 3 by the bending modulus of elasticity, the bending strength may not be included in the above range. The measuring method of the bending strength and the bending modulus of elasticity of the photovoltaic device 3 is measured in accordance with JIS K 7171. The bending radius of the photovoltaic device 3 is preferably 10 cm or less, and the bending radius of the photovoltaic device 3 is measured using an R caliper (radius measuring instrument) or the like.

[0034] (Backsheet 9) The backsheet 9 has a barrier performance against water vapor and a protection performance against external forces. The backsheet 9 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 9 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, and vinyl resins (e.g., polyvinyl chloride), natural resins, rubbers, metals, carbon, pulp, and the like.

[0035] The longitudinal elastic modulus of the backsheet 9 is preferably 2400 MPa or more, more preferably 3000 MPa or more. Also, the longitudinal elastic modulus of the backsheet 9 is preferably 4200 MPa or less, more preferably 3100 MPa or less. Examples of the material of the backsheet 9 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, and vinyl resins (e.g., polyvinyl chloride). 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 9.

[0036] The thickness of the backsheet 9 is preferably 50 μm or more, more preferably 100 μm or more. Also, the thickness of the backsheet 9 is preferably 2000 μm or less, more preferably 1000 μm or less.

[0037] (Power generation unit 10) The power generation unit 10 includes a power generation cell 20 which is a photoelectric conversion element utilizing 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 device 3 (for example, the longitudinal direction or the width direction of the solar power generation device 3). Note that the power generation unit 10 may be composed of one power generation cell 20.

[0038] (Power generation cell 20) The power generation cell 20 includes a light-transmissive substrate 21, a light-transmissive conductive layer 22, a power generation layer 23, and an electrode 24. The light-transmissive substrate 21, the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24 are laminated in this order along the direction from the barrier sheet 7 toward the back sheet 9. That is, the light-transmissive substrate 21 is disposed to face the barrier sheet 7, and the electrode 24 is disposed to face the back sheet 9.

[0039] (Light-transmissive substrate 21) The light-transmissive substrate 21 supports the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24. The light-transmissive substrate 21 has light-transmissivity. The light-transmissivity of the light-transmissive 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".

[0040] Examples of the material of the light-transmissive 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.

[0041] The thickness of the light-transmissive substrate 21 is not particularly limited as long as it can support the light-transmissive 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.

[0042] 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 device 3, and may be removed after manufacturing or during manufacturing. In the case of removal, a substrate having no light-transmittance may be used instead of the light-transmissive substrate 21.

[0043] (Light-transmissive conductive layer 22) The light-transmissive conductive layer 22 is a layer having conductivity and functions as a cathode. The light-transmissive conductive layer 22 has light-transmittance. The light-transmissive conductive layer 22 is preferably transparent.

[0044] 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.

[0045] Further, as the light-transmissive conductive layer 22, it may be configured to have light-transmittance by forming a pattern through which light can pass while using an opaque material. 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 through which light can pass include a lattice shape, a linear shape, a wavy shape, a honeycomb shape, a round hole shape, and the like.

[0046] 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.

[0047] (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.

[0048] (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. Also, a p-type organic semiconductor or a p-type inorganic semiconductor can be used as the material of the hole transport layer 30.

[0049] 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.

[0050] (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.

[0051] 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 incident light angle (hereinafter sometimes referred to as the incident angle dependence) is relatively low. Thereby, in the present embodiment, higher power generation efficiency can be obtained.

[0052] 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.

[0053] The organic group of the organic cation constituting the A site is not particularly limited, and examples thereof include alkylammonium derivatives and formamidinium derivatives. The organic cation constituting the A site may be one type or two or more types.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] (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.

[0058] 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.

[0059] 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.

[0060] (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 device 3 can be further improved (that is, the incidence of light from the opposite side of the surface 6 on 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 an alloy containing these.

[0061] (Barrier sheet 7) The barrier sheet 7 has light-transmitting property and constitutes the surface 6 of the solar power generation device 3 as described above. The barrier sheet 7 is preferably transparent. The barrier sheet 7 has a barrier performance against water vapor and a protection performance against external force.

[0062] The barrier sheet 7 has flexibility. The material used for the barrier sheet 7 preferably has a longitudinal elastic modulus of 100 Pa or more and 10,000 MPa or less, more preferably 1,000 MPa or more and 5,000 MPa or less. Specific examples of the material of the barrier sheet 7 include a plastic film, a vinyl film, and the like.

[0063] The thickness of the barrier sheet 7 is preferably 50 μm or more, more preferably 100 μm or more. Also, the thickness of the barrier sheet 7 is preferably 2,000 μm or less, more preferably 1,000 μm or less. When the thickness of the barrier sheet 7 is 50 μm or more and 2,000 μm or less, the bending strength of the solar power generation device 3 can be easily set to 50 MPa or more and 150 MPa or less.

[0064] (Sealing agent 11) The encapsulant 11 prevents water from entering the power generation layer 23 from the periphery 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 part may be covered with a sealing edge material 12 or the like.

[0065] 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.

[0066] 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 9 and the barrier sheet 7. Thereby, it is possible to suppress the peeling of the backsheet 9 and the barrier sheet 7 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, for example, a value calculated from the longitudinal elastic modulus and the Poisson's ratio obtained by the tensile test method.

[0067] Also, the encapsulant 11 can be defined by viscosity from another perspective. 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.

[0068] 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.

[0069] The backsheet 9 and the barrier sheet 7 are adhered via the sealant 11, and the adhesion strength 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 power generation device 3 becomes larger. Therefore, by adopting the adhesion strength within the above range in the peel test, peeling over a long period can be effectively suppressed. The peel test is carried out in accordance with JIS Z 0237.

[0070] 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 power generation device 3 can be reduced, and thus the workability and operability can be improved.

[0071] Note that the sealant 11 is not necessarily required and may not be provided. When the sealant 11 is not provided, in the photovoltaic power generation device 3, for example, only the power generation unit 10 is disposed between the barrier sheet 7 and the backsheet 9, and the barrier sheet 7 and the backsheet 9 are each adhered to the power generation unit 10.

[0072] (Sealing edge material 12) The sealing edge material 12 has a structure in which a first adhesive portion 40 adhered to "the surface of the barrier sheet 7 constituting the surface 6", a sealing portion 41 for sealing between the barrier sheet 7 and the backsheet 9, and a second adhesive portion 42 adhered to "the surface of the backsheet 9 constituting the back surface 8" are sequentially connected.

[0073] Examples of the material of the sealing edge material 12 include a tape material made of butyl rubber, silicone rubber, or the like.

[0074] The sealing edge material 12 is not necessarily required. For example, the edge of the barrier sheet 7 may be bent toward the back sheet 9 side, and the bent tip may be joined to the back sheet 9. Alternatively, the edge of the back sheet 9 may be bent toward the barrier sheet 7 side, and the bent tip may be joined to the barrier sheet 7. By doing so, the sealing edge material 12 becomes unnecessary.

[0075] (Operation of the photovoltaic power generation device 3) According to the above-described photovoltaic power generation device 3, when the light irradiated on the surface 6 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 transparent conductive layer 22 (cathode) through the hole transport layer 30, so that an electric current flows from the transparent conductive layer 22 to the electrode 24 (i.e., power generation is performed).

[0076] 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 transparent conductive layer 22 (cathode) side. In two adjacent power generation cells 20, 20, the extension portion 24a of the electrode 24 of one cell 20 is joined to the transparent conductive layer 22 of the other cell 20. By this joining, while the photovoltaic power generation device 3 is irradiated with light, an electric current flows from the transparent 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 electric current is indicated by an arrow in FIG. 3(C)). The electric current is taken out through a power distribution line (not shown).

[0077] By configuring the power generation unit 10 from the above-described photoelectric conversion unit, even if a problem occurs in some of the power generation cells 20, the amount of electricity taken out from the power generation unit 10 can be stabilized.

[0078] 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 light-transmitting 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 light-transmitting conductive layer 22 of one cell 20 is joined to the electrode 24 of the other cell 20. Even in this case, the same effect as described above can be obtained.

[0079] When providing the light-transmitting base material 21 in 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 light-transmitting conductive layer 22, the power generation layer 23, and the electrode 24 of each power generation cell 20 are supported by a common light-transmitting base material 21.

[0080] When the power generation unit 10 is composed of one power generation cell 20, the current flowing from the electrode 24 to the light-transmitting conductive layer 22 is taken out via the power distribution line.

[0081] Note that the solar power generation device 3 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 solar power generation device 3 and are electrically connected in series or in parallel.

[0082] 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 light-transmitting conductive layer 22A at the 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 light-transmitting 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.

[0083] 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.

[0084] In addition, regardless of whether the power generation unit 10 is composed of the above-mentioned photoelectric conversion unit or a single power generation cell 20, the distance between two 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 two 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.

[0085] (Fixing tool 4) The fixing tool 4 (FIGS. 1 and 2) includes a frame member 50, a pressing member 51, and an elastic member 52.

[0086] As shown in FIG. 1, the frame member 50 is annular and is provided around the solar power generation device 3. As shown in FIG. 2, the frame member 50 has a cross-sectional shape in which one side portion 53 of the width is bent with respect to the other side portion 54 of the width. One side portion 53 of the width is disposed on the outer edge portion 13 of the solar power generation device 3, and the other side portion 54 of the width is disposed outside the solar power generation device 3.

[0087] 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. Also, when the frame member 50 is formed of resin, in order to enhance the weather resistance of the frame member 50, it is preferable to color the frame member 50 black.

[0088] The elastic member 52 is disposed along the entire circumference of the photovoltaic device 3 between the outer edge portion 13 of the photovoltaic device 3 and one side portion 53 of the width of the frame member 50. In this specification, "elastic" means that the elastic modulus is 4000 MPa or less.

[0089] FIG. 4 is a plan view showing a state in which the frame member 50 (FIGS. 1 and 2) is removed from the installation structure 1 according to the present embodiment. As shown in FIG. 4, in a plan view, the elastic member 52 has an annular shape along the periphery of the photovoltaic device 3.

[0090] The elastic member 52 can be formed of rubber or resin, but is preferably formed of rubber. As the resin for forming the elastic member 52, for example, PP (polypropylene) or PE (polyethylene) can be used. As the rubber for forming the elastic member 52, for example, NBR (nitril-butadiene rubber), SBR (styrene-butadiene rubber), silicone rubber, or butyl rubber can be used. Further, the elastic member 52 may be provided integrally with the frame member 50 or may not be integrated with the frame member 50. In order to integrate the elastic member 52 and the frame member 50, 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 bond the elastic member 52 and the frame member 50.

[0091] The pressing member 51 is a member that presses the frame member 50 toward the installation surface 2 side, and the elastic member 52 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 side portion 54 of the width 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 by the pressing member 51 toward the installation surface 2 side (in FIGS. 4 and FIGS. 5 and 6 described later, the illustration of the hole of the elastic member 52 through which the shaft portion 56 passes is omitted). Note that the tip side of the shaft portion 56 that penetrates the one side portion 53 of the width of the frame member 50, the elastic member 52, and the outer edge portion 13 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 or the like) constituting the installation surface 2".

[0092] (Function and effect) According to the fixture 4 and the installation structure 1 according to the present embodiment, the elastic member 52 is brought into close contact with the frame member 50 and the outer edge portion 13 of the photovoltaic power generation device 3 by the force with which the pressing member 51 presses the frame member 50, so that the outer edge portion 13 of the photovoltaic power generation device 3 can be strongly pressed against the installation surface 2 by the above-described force. Therefore, it is possible to suppress the occurrence of a gap between the photovoltaic power generation device 3 and the installation surface 2, and it is possible to suppress the wind from blowing into the space between the photovoltaic power generation device 3 and the installation surface 2. Accordingly, it is possible to suppress the vibration of the photovoltaic power generation device 3 due to the lifting force by the wind, and it is possible to avoid the situation where the photovoltaic power generation device 3 is damaged due to the vibration.

[0093] The present invention is not limited to the above-described embodiment and can be variously modified. Hereinafter, modification examples of the present invention will be described. In the following description, the points different from the above-described embodiment will be described, and the same reference numerals will be given to the points common to the above-described embodiment, and the description thereof will be omitted.

[0094] For example, in the above embodiment, an example in which the fixture 4 (FIGS. 1 and 2) includes a single elastic member 52 having an annular shape is shown. However, the fixture 4 may include a plurality of elastic members 52 arranged along the entire circumference of the solar power generation device 3 (the plurality of elastic members 52 are respectively arranged between the outer edge portion 13 of the solar power generation device 3 and the one-side width portion 53 of the frame member 50 and are in a compressed state by the pressure of the pressing member 51). The "arrangement of a plurality of elastic members 52 along the entire circumference of the solar power generation device 3" includes a case where a plurality of elastic members 52 are sequentially arranged in the circumferential direction of the solar power generation device 3 and the ends of two adjacent elastic members 52, 52 abut each other, or as shown in FIGS. 5 and 6, one or a plurality of elastic members 52 are respectively arranged inside and outside an annular line K extending along the periphery of the solar power generation device 3, and in a viewing direction "orthogonal to the annular line K and parallel to the front surface 6 or the back surface 8 of the solar power generation device 3", a case where the "elastic members 52 arranged inside and outside the annular line K" are continuous is also included. If a plurality of elastic members 52 are arranged as described above, it is possible to suppress the wind from entering between the one-side width portion 54 and the outer edge portion 13, so that it is possible to suppress the wind passing between the one-side width portion 54 and the outer edge portion 13 from entering between the solar power generation device 3 and the installation surface 2.

[0095] Note that FIG. 5 shows an example in which the fixtures 4 (FIGS. 1 and 2) include elastic members 52A, 52B disposed inside an annular line K1 extending along the periphery of the photovoltaic power generation device 3, and elastic members 52C, 52D, 52E, 52F 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 device 3 and a pair of transverse sides extending in the width direction of the photovoltaic power generation device 3). The elastic members 52A, 52B, 52D, 52F each extend in the longitudinal direction of the photovoltaic power generation device 3. The elastic members 52A, 52D are disposed on one side in the width direction of the photovoltaic power generation device 3, and the elastic members 52B, 52F are disposed on the other side in the width direction of the photovoltaic power generation device 3. The elastic members 52C, 52E each extend in the width direction of the photovoltaic power generation device 3. The elastic member 52C is disposed on one side in the longitudinal direction of the photovoltaic power generation device 3, and the elastic member 52E is disposed on the other side in the longitudinal direction of the photovoltaic power generation device 3. One end 52Ca in the width direction of the elastic member 52C abuts against one end 52Da in the longitudinal direction of the elastic member 52D, one end 52Cb in the width direction of the elastic member 52C abuts against one end 52Fa in the longitudinal direction of the elastic member 52F, one end 52Ea in the width direction of the elastic member 52E abuts against one end 52Aa in the longitudinal direction of the elastic member 52A, and one end 52Eb in the width direction of the elastic member 52E abuts against one end 52Ba in the longitudinal direction of the elastic member 52B. In a side view looking in the width direction, the other end 52Db in the longitudinal direction of the elastic member 52D and the one end 52Ab in the longitudinal direction of the elastic member 52A overlap, and the other end 52Fb in the longitudinal direction of the elastic member 52F and the one end 52Bb in the longitudinal direction of the elastic member 52B overlap. By being arranged as described above, the elastic members 52A, 52E, 52B, 52C, 52D, 52F are made continuous in a viewing direction "orthogonal to the annular line K1 and parallel to the front surface 6 or the back surface 8 of the photovoltaic power generation device 3" (for example, the elastic members 52D, 52A are made continuous in the above viewing direction by the overlapping of the ends 52Db, 52Ab as described above).

[0096] FIG. 6 shows an example in which the fixture 4 (FIGS. 1 and 2) includes elastic members 52G and 52H extending in the width direction of the photovoltaic device 3 and first to fourth groups 90 to 93 composed of a plurality of elastic members 52 arranged in the longitudinal direction of the photovoltaic device 3. The second group 91 and the third group 92 are arranged inside an annular line K2 extending along the periphery of the photovoltaic device 3, and the elastic members 52G, 52H, the first group 90, and the fourth group 93 are arranged 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 device 3 and a pair of transverse sides extending in the width direction of the photovoltaic device 3). The elastic member 52G is arranged on one side in the longitudinal direction of the photovoltaic device 3, the elastic member 52H is arranged on the other side in the longitudinal direction of the photovoltaic device 3, the first group 90 and the second group 91 are arranged on one side in the width direction of the photovoltaic device 3, and the third group 92 and the fourth group 93 are arranged on the other side in the width direction of the photovoltaic device 3. The other longitudinal end 52Ia of the elastic member 52I, which is the most on the other side in the longitudinal direction in the first group 90, abuts against the one-side end 52Ha in the width direction of the elastic member 52H, the one longitudinal end 52Ja of the elastic member 52J, which is the most on the one side in the longitudinal direction in the second group 91, abuts against the one-side end 52Ga in the width direction of the elastic member 52G, the other longitudinal end 52La of the elastic member 52L, which is the most on the other side in the longitudinal direction in the third group 92, abuts against the other-side end 52Hb in the width direction of the elastic member 52H, and the one longitudinal end 52Ma of the elastic member 52M, which is the most on the one side in the longitudinal direction in the fourth group 93, abuts against the other-side end 52Gb in the width direction of the elastic member 52G. And in a side view when viewed in the width direction, the other longitudinal ends of each elastic member 52 in the first group 90 except the "end 52Ia of the elastic member 52I" overlap the one longitudinal ends of the elastic members 52 in the second group 91, the one longitudinal ends of each elastic member 52 in the second group 91 except the "end 52Ja of the elastic member 52J" overlap the other longitudinal ends of the elastic members 52 in the first group 90, the other longitudinal ends of each elastic member 52 in the third group 92 except the "end 52La of the elastic member 52L" overlap the one longitudinal ends of the elastic members 52 in the fourth group 93, and the one longitudinal ends of each elastic member 52 in the fourth group 93 except the "end 52Ma of the elastic member 52M" overlap the other longitudinal ends of the elastic members 52 in the third group 92.By being arranged as described above, the elastic members 52G, 52H and the plurality of elastic members 52 included in the first to fourth groups 90 to 93 are made to be continuous in a viewing direction "orthogonal to the annular line K2 and parallel to the front surface 6 or the back surface 8 of the photovoltaic device 3".

[0097] Also, as shown in FIGS. 7 and 8, one or a plurality of protrusions 57 protruding toward the photovoltaic device 3 may be provided on the surface 52a of the elastic member 52 facing the photovoltaic device 3. The protrusion 57 is provided as a wind stopping point, and by providing the protrusion 57, the design becomes easier and at the same time, the material cost can be suppressed.

[0098] When the fixture 4 (FIGS. 1 and 2) includes one elastic member 52 having an annular shape, an annular protrusion 57 extending around the entire circumference of the elastic member 52 is provided. Alternatively, a plurality of protrusions 57 arranged in the circumferential direction of the elastic member 52 are provided. When the fixture 4 includes a plurality of elastic members 52, one or a plurality of protrusions 57 are provided on each elastic member 52.

[0099] Also, the cross-section of the protrusion 57 may have a shape with a constant width (for example, a rectangular shape) as shown in FIG. 7(A), or may have a shape in which the width gradually decreases toward the photovoltaic device 3 side as shown in FIGS. 7(B), 7(C), 8(A), and 8(B) (FIG. 7(B) shows the case where the cross-section of the protrusion 57 has a semi-circular shape, and FIGS. 7(C), 8(A), and 8(B) show the case where the cross-section of the protrusion 57 has a triangular shape).

[0100] Also, as shown in Fig. 8(A), the cross-sectional shape of the protruding portion 57 may be shaped to incline outward of the solar power generation device 3 as it approaches the solar power generation device 3 side. In this way, it is possible to make it difficult for the outer edge portion 13 of the solar power generation device 3 to slip out from between the elastic member 52 and the installation surface 2. In particular, when the operation of inserting the outer edge portion 13 between the elastic member 52 and the installation surface 2 is performed when installing the solar power generation device 3, this operation can be easily performed, and after performing this operation, it is possible to make it difficult for the outer edge portion 13 of the solar power generation device 3 to slip out from between the elastic member 52 and the installation surface 2.

[0101] Also, as shown in Fig. 8(B), the cross-sectional shape of the protruding portion 57 may be shaped to incline inward of the solar power generation device 3 as it approaches the solar power generation device 3 side. In this way, the wind blocking effect by the protruding portion 57 can be enhanced.

[0102] Also, the installation structure of the present invention can be deformed as shown in Figs. 9 to 12 ((A) and (B) of Figs. 9, 10, 11, and 12 are cross-sectional views showing a state where the installation structure according to a modified example of the present invention is cut, (A) of Figs. 9, 10, 11, and 12 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. 9, 10, 11, and 12 shows a cross-section corresponding to Fig. 2(B) (a cross-section at a position where the pressing member is provided)).

[0103] The installation structure 60 shown in Fig. 9 includes an installation surface 2, a solar power generation device 3, and a fixture 61 for fixing the solar power generation device 3. The fixture 61 includes one or a plurality of elastic members 62 arranged along the entire circumference of the solar power generation device 3 between the outer edge portion 13 of the solar power generation device 3 and the installation surface 2, in addition to the frame member 50 and the pressing member 51 shown in the above embodiment. The elastic member 62 is formed of the same material as the elastic member 52 shown in the embodiment.

[0104] When the fixture 61 includes one elastic member 62, from the viewpoint of suppressing the blowing of wind between the solar power generation device 3 and the installation surface 2, the annular elastic member 62 is arranged along the entire circumference of the solar power generation device 3.

[0105] Also, when the fixture 61 includes a plurality of elastic members 62 (that is, when the plurality of elastic members 62 are arranged along the entire circumference of the photovoltaic power generation device 3), from the viewpoint of suppressing the blowing of wind between the photovoltaic power generation device 3 and the installation surface 2, a plurality of elastic members 62 are sequentially arranged in the circumferential direction of the photovoltaic power generation device 3, and the ends of two adjacent elastic members 62, 62 are abutted against each other. Alternatively, one or a plurality of elastic members 62 are arranged inside and outside an annular line extending along the periphery of the photovoltaic power generation device 3, and in a viewing direction "orthogonal to the annular line and parallel to the front surface 6 or the back surface 8 of the photovoltaic power generation device 3", the "elastic members 62 arranged inside and outside the annular line" are in a continuous state.

[0106] The elastic member 62 may be provided integrally with the frame member 50 or the photovoltaic power generation device 3, or may not be integrated with the frame member 50 and the photovoltaic power generation device 3. When the elastic member 62 is integrated with the frame member 50 or the photovoltaic power generation device 3, for example, an adhesive such as 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 bond the elastic member 62 to the frame member 50 or the photovoltaic power generation device 3.

[0107] According to the fixture 61 and the installation structure 60 shown in FIG. 9, due to the force of the pressing member 51 pressing the frame member 50, the elastic member 62 is in close contact with the outer edge portion 13 of the photovoltaic power generation device 3 and the installation surface 2, so that the generation of a gap between the photovoltaic power generation device 3 and the installation surface 2 can be suppressed. Thereby, the blowing of wind between the photovoltaic power generation device 3 and the installation surface 2 can be suppressed, so that the vibration of the photovoltaic power generation device 3 due to the lift force of the wind can be suppressed.

[0108] The installation structure 70 shown in FIG. 10 includes an installation surface 2, a photovoltaic power generation device 3, and a fixture 71 for fixing the photovoltaic power generation device 3. The fixture 71 includes an elastic member 62 shown in FIG. 9 in addition to the frame member 50, the pressing member 51, and the elastic member 52 shown in the above embodiment.

[0109] According to the fixture 71 and the installation structure 70 shown in FIG. 10, due to the force by which the pressing member 51 presses the frame member 50, the elastic member 52 is in close contact with the frame member 50 and the outer edge portion 13 of the photovoltaic power generation device 3, and the elastic member 52 is in close contact with the outer edge portion 13 of the photovoltaic power generation device 3 and the installation surface 2, thereby suppressing the generation of a gap between the photovoltaic power generation device 3 and the installation surface 2. As a result, it is possible to suppress the wind from blowing into the space between the photovoltaic power generation device 3 and the installation surface 2, and thus suppress the vibration of the photovoltaic power generation device 3 caused by the lift force of the wind.

[0110] The installation structure 80 shown in FIG. 11 includes an installation surface 2, a photovoltaic power generation device 3, and a fixture 81 for fixing the photovoltaic power generation device 3. The fixture 81 includes one or a plurality of elastic members 82 that connect the elastic member 52 and the elastic member 62 in addition to the frame member 50, the pressing member 51, the elastic member 52, and the elastic member 62 shown in FIGS. 9 and 10, and are arranged along the entire circumference of the photovoltaic power generation device 3 on the outside of the photovoltaic power generation device 3 (specifically, between the photovoltaic power generation device 3 and the other side portion 54 of the width of the frame member 50). The elastic member 82 is formed of the same material as the elastic members 52 and 62. Connecting the elastic member 52 and the elastic member 62 by the elastic member 82 is realized by integrally molding the elastic members 52, 65, and 82, or by adhering the elastic member 82 to the elastic members 52 and 62. This adhesion is performed, for example, by using an adhesive such as 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.

[0111] When the fixture 81 includes one elastic member 62, from the viewpoint of suppressing the intrusion of wind between the photovoltaic power generation device 3 and the installation surface 2, an annular elastic member 82 is arranged along the entire circumference of the photovoltaic power generation device 3 (in the above case, the elastic members 52 and 62 are also annular along the entire circumference of the photovoltaic power generation device 3).

[0112] When the fixture 81 includes a plurality of elastic members 82 (that is, when a plurality of elastic members 62 are arranged along the entire circumference of the photovoltaic power generation device 3), from the viewpoint of suppressing the intrusion of wind between the photovoltaic power generation device 3 and the installation surface 2, a plurality of elastic members 82 are sequentially arranged in the circumferential direction of the photovoltaic power generation device 3, and the ends of two adjacent elastic members 82 and 82 are butted against each other. Alternatively, one or a plurality of elastic members 82 are arranged inside and outside an annular line extending along the periphery of the photovoltaic power generation device 3, and in a viewing direction "orthogonal to the annular line and parallel to the front surface 6 or the back surface 8 of the photovoltaic power generation device 3", the "elastic members 82 arranged inside and outside the annular line" are in a continuous state. When the fixture 81 includes a plurality of elastic members 82, the plurality of elastic members 52 and 62 are arranged in the same manner as the plurality of elastic members 82 described above.

[0113] The elastic member 82 may be provided integrally with the frame member 50 or the photovoltaic power generation device 3, or may not be integrated with the frame member 50 and the photovoltaic power generation device 3. When the elastic member 82 and the frame member 50 or the photovoltaic power generation device 3 are integrated, for example, an adhesive such as 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 is used to bond the elastic member 82 and the frame member 50 or the photovoltaic power generation device 3.

[0114] According to the fixture 81 and the installation structure 80 shown in FIG. 11, the elastic member 82 connects the elastic member 52 and the elastic member 62, thereby suppressing the displacement of the elastic members 52 and 62. As a result, it is possible to stably suppress the occurrence of a gap between the photovoltaic power generation device 3 and the installation surface 2, so that it is possible to stably suppress the blowing of wind between the photovoltaic power generation device 3 and the installation surface 2. Therefore, it is possible to stably suppress the vibration of the photovoltaic power generation device 3 due to the lift force of the wind.

[0115] The installation structure 90 shown in FIG. 12 includes an installation surface 2, a photovoltaic power generation device 3, and a fixture 91 for fixing the photovoltaic power generation device 3. The fixture 91 includes a frame member 92, a pressing member 93, and elastic members 94 and 95.

[0116] In the installation structure 90, the outer edge portion 13 of the photovoltaic power generation device 3 exhibits a wave shape in which opposite curved portions 13a that curve convexly toward the side opposite to the installation surface 2 and installation surface side curved portions 13b that curve convexly toward the installation surface 2 alternate with each other.

[0117] The frame member 92 is annular in plan view and is formed of the same material as the frame member 50 shown in the above embodiment. The frame member 92 is provided around the photovoltaic power generation device 3 and is entirely disposed on the outer edge portion 13 of the photovoltaic power generation device 3.

[0118] The elastic members 94 and 95 are formed of the same material as the elastic member 52 shown in the above embodiment. One or a plurality of elastic members 94 are arranged along the entire circumference of the photovoltaic power generation device 3 between the opposite curved portion 13a and the installation surface 2, and one or a plurality of elastic members 95 are arranged along the entire circumference of the photovoltaic power generation device 3 between the installation surface side curved portion 13b and the frame member 92. When a plurality of the above curved portions 13a and 13b are formed, the fixture 91 includes one or a plurality of elastic members 94 arranged along the entire circumference of the photovoltaic power generation device 3 at each between the opposite curved portion 13a and the installation surface 2, and one or a plurality of elastic members 95 arranged along the entire circumference of the photovoltaic power generation device 3 at each between the installation surface side curved portion 13b and the frame member 92.

[0119] When arranging one elastic member 7 between the opposite-side bending portion 13a and the installation surface 2, from the viewpoint of suppressing the intrusion of wind between the photovoltaic power generation device 3 and the installation surface 2, the shape of the elastic member 94 is an annular shape.

[0120] When arranging a plurality of elastic members 94 between the opposite-side bending portion 13a and the installation surface 2, from the viewpoint of suppressing the intrusion of wind between the photovoltaic power generation device 3 and the installation surface 2, a plurality of elastic members 94 are sequentially arranged in the circumferential direction of the photovoltaic power generation device 3, and the ends of two adjacent elastic members 94, 94 are butted against each other. Alternatively, one or a plurality of elastic members 94 are arranged inside and outside an annular line extending along the periphery of the photovoltaic power generation device 3, and in a viewing direction of "a direction perpendicular to the annular line and parallel to the front surface 6 or the back surface 8 of the photovoltaic power generation device 3", the "elastic members 94 arranged inside and outside the annular line" are in a continuous state.

[0121] When arranging one elastic member 95 between the installation-surface-side bending portion 13b and the frame member 92, from the viewpoint of bringing the entire circumference of the frame member 92 and the entire circumference of the photovoltaic power generation device 3 into close contact with the elastic member 95, the shape of the elastic member 94 is an annular shape.

[0122] When arranging a plurality of elastic members 94 between the installation-surface-side bending portion 13b and the frame member 92, from the viewpoint of bringing the entire circumference of the frame member 92 and the entire circumference of the photovoltaic power generation device 3 into close contact with the elastic member 95, a plurality of elastic members 95 are sequentially arranged in the circumferential direction of the photovoltaic power generation device 3, and the ends of two adjacent elastic members 95, 95 are butted against each other. Alternatively, one or a plurality of elastic members 95 are arranged inside and outside an annular line extending so as to surround the periphery of the photovoltaic power generation device 3, and in a viewing direction of "a direction perpendicular to the annular line and parallel to the front surface 6 or the back surface 8 of the photovoltaic power generation device 3", the "elastic members 95 arranged inside and outside the annular line" are in a continuous state.

[0123] Also, the elastic member 94 may be provided integrally with the photovoltaic power generation device 3, or may not be integrated with the photovoltaic power generation device 3. Further, the elastic member 95 may be provided integrally with the frame member 92 or the photovoltaic power generation device 3, or may not be integrated with the frame member 92 and the photovoltaic power generation device 3. The above integration is achieved by adhesion using an adhesive such as 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.

[0124] The pressing member 93 (FIG. 12(B)) is a member that presses the frame member 92 toward the installation surface 2 side. Each of the elastic members 94 and 95 is in a state of being compressed by the pressure applied by the pressing member 93 to the frame member 92. In the illustrated example, the pressing member 93 is composed of a bolt or a stud made of metal or resin in which a small-diameter shaft portion 97 extends from a large-diameter head portion 96. The tip side of the shaft portion 97 that penetrates the frame member 92, the elastic member 95, and the installation surface side curved portion 13b is penetrated under the installation surface 2, and the head portion 96 is pressed against the frame member 92, whereby the frame member 92 is pressed toward the installation surface 2 side. Note that the tip side of the shaft portion 97 that penetrates the frame member 92, the opposite side curved portion 13a, and the elastic member 94 may be penetrated under the installation surface 2 to press the head portion 96 against the frame member 92. The number and installation position of the pressing members 93 are appropriately set according to the shape or size of the frame member 92 or the like. When a plurality of pressing members 93 are provided, it is preferable to arrange the pressing members 93 at equal intervals in the circumferential direction of the frame member 92. Further, the pressing member 93 may be composed of a clamp that sandwiches the frame member 92 and the "object constituting the installation surface 2".

[0125] According to the installation structure 90 and the fixture 91 shown in FIG. 12, by arranging the elastic members 94 and 95 between the frame member 92 and the installation surface 2, the elastic member 95 is in close contact with the frame member 50 and the outer edge portion 13 of the photovoltaic power generation device 3, and the elastic member 94 is in close contact with the outer edge portion 13 of the photovoltaic power generation device 3 and the installation surface 2, so that it is possible to suppress the generation of a gap between the photovoltaic power generation device 3 and the installation surface 2. Thereby, it is possible to suppress the wind from blowing into the space between the photovoltaic power generation device 3 and the installation surface 2, so that it is possible to suppress the vibration of the photovoltaic power generation device 3 due to the lifting force of the wind.

[0126] Further, by arranging the elastic member 94 between the opposite side curved portion 13a and the installation surface 2 and arranging the elastic member 95 between the installation surface side curved portion 13b and the frame member 92, even if the pressing member 51 strengthens the force for pressing the frame member 50, the elastic members 94 and 95 can suppress damage to the photovoltaic power generation device 3.

[0127] In the above-described example, the installation structures 1, 60, 70, 80, 90 and the fixtures 4, 61, 71, 81, 91 are shown with an annular frame member 50, 92. However, the installation structures 1, 60, 70, 80, 90 and the fixtures 4, 61, 71, 81, 91 may include a frame member composed of a plurality of frames arranged in the circumferential direction of the photovoltaic power generation device 3 (FIG. 13 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 device 3). In the above case, in the installation structures 1, 60, 70, 80, 90 and the fixtures 4, 61, 71, 81, 91, a part or the whole of each frame is arranged on the outer edge portion of the photovoltaic power generation device 3, a pressing member is provided for each frame, and each pressing member presses the corresponding frame toward the installation surface 2.

[0128] Also, in the installation structures 1, 60, 70, 80, 90 and the fixtures 4, 61, 71, 81, 91 described above, from the viewpoint of suppressing the blowing-in of wind, the compression ratio of the elastic members 52, 62, 82, 94, 95 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 and the deterioration of the elastic member due to excessive compression, the compression ratio of the elastic members 52, 62, 82, 94, 95 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 ratio 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 before compression and the thickness of the elastic member before compression".

[0129] Also, the thickness of the elastic members 52, 62, 82, 94, 95 before compression is preferably 1 mm or more, more preferably 2.5 mm or more, still more preferably 5 mm or more, even more preferably 10 mm or more, even more preferably 15 mm or more, and even more preferably 20 mm or more. Also, the thickness of the elastic members 52, 62, 82, 94, 95 before compression is preferably 100 mm or less, more preferably 50 mm or less, still more preferably 40 mm or less, and even more preferably 30 mm or less. And when the thickness of the elastic members 52, 62, 82, 94, 95 before compression is set as described above, from the viewpoint of suppressing the blowing-in of wind, the compression width (compression displacement) of the elastic members 52, 62, 82, 94, 95 is preferably 0.1 mm or more, more preferably 1 mm or more, still more preferably 5 mm or more, even more preferably 10 mm or more, and even 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 3, the compression width (compression displacement) of the elastic members 52, 62, 82, 94, 95 is preferably 100 mm or less, more preferably 75 mm or less, still more preferably 50 mm or less, even more preferably 40 mm, and even more preferably 30 mm or less.

[0130] In order to improve the workability during construction, the longitudinal elastic modulus of the elastic members 52, 62, 82, 94, and 95 is preferably 0.1 MPa or more, more preferably 10 MPa or more, and still more preferably 100 MPa or more.

[0131] Also, from the viewpoint of suppressing the blowing-in of wind, the longitudinal elastic modulus of the elastic members 52, 62, 82, 94, and 95 is 4000 MPa or less, more preferably 2000 MPa or less, still more preferably 1000 MPa or less, and still more preferably 500 MPa or less. Also, from the same viewpoint, it is preferable that the longitudinal elastic modulus of the elastic members 52, 62, 82, 94, and 95 is lower than the longitudinal elastic modulus of the frame member. For example, the longitudinal elastic modulus of the elastic members 52, 62, 82, 94, and 95 is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, still more preferably 25%, still more preferably 10% or less, and still more preferably 5% or less with respect to the longitudinal elastic modulus of the frame member.

Explanation of Symbols

[0132] 1, 60, 70, 80, 90 Installation Structure 2 Installation Surface 3 Solar Power Generation Device 4, 61, 71, 81, 91 Fixture 13 Outer Edge Portion of Solar Power Generation Device 13a Opposite Curved Portion 13b Installation Surface Side Curved Portion 50, 92 Frame Member 51, 93 Pressing Member 52, 62, 82, 94, 95 Elastic Member 57 Protrusion

Claims

1. A fixture for fixing a photovoltaic power generation device provided on an installation surface, comprising: A frame member provided around the photovoltaic power generation device and disposed on the outer edge of the photovoltaic power generation device; A pressing member for pressing the frame member toward the installation surface side; And one or more elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the frame member or the installation surface.

2. The fixture according to claim 1, comprising one or more first elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the frame member and provided integrally with the frame member.

3. The fixture according to claim 1, comprising one or more first elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the frame member and having a protruding portion protruding toward the photovoltaic power generation device on the surface facing the photovoltaic power generation device.

4. One or more first elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the frame member; And one or more second elastic members disposed along the entire circumference of the photovoltaic power generation device between the outer edge of the photovoltaic power generation device and the installation surface. The fixture according to claim 1.

5. The fixture according to claim 4, further comprising one or more third elastic members that connect the first elastic member and the second elastic member and are disposed along the entire circumference of the photovoltaic power generation device outside the photovoltaic power generation device.

6. The outer edge of the photovoltaic power generation device exhibits a wavy shape in which an opposite 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; One or more of the first elastic members disposed along the entire circumference of the solar power generation device between the opposite side bending portion and the installation surface, and one or more of the second elastic members disposed along the entire circumference of the solar power generation device between the installation surface side bending portion and the frame member. The fixture according to claim 1.

7. An installation surface, A solar power generation device 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, A pressing member for pressing the frame member toward the installation surface side, One or more elastic members disposed along the entire circumference of the solar power generation device between the outer edge portion of the solar power generation device and the frame member or the installation surface. The installation structure of the solar power generation device.

8. The bending strength of the solar power generation device is 10 MPa or more and 200 MPa or less. The installation structure of the solar power generation device according to claim 7.

9. The bending elastic modulus of the solar power generation device is 500 MPa or more and 10,000 MPa or less. The installation structure of the solar power generation device according to claim 7.

10. The bending radius of the solar power generation device is 10 cm or less. The installation structure of the solar power generation device according to claim 7.

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