Fixtures, solar power generation device installation structure

Abstract

To provide a fixing device capable of suppressing wind from blowing in between a solar power generation device and an installation surface, thereby suppressing vibration of the solar power generation device due to uplift caused by wind.SOLUTION: A fixing device 4 is used to fix a solar power generation device 3 mounted on an installation surface 2, and includes a frame member 50 that is provided around the solar power generation device 3 and positioned on the outer edge portion 13 of the solar power generation device 3, a pressing member 51 that presses the frame member 50 toward the installation surface 2, and an elastic member 52 that is positioned along the entire circumference of the solar power generation device 3 between the frame member 50 and the installation surface 2.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a fastener for fixing a photovoltaic power generation device, and an installation structure for a photovoltaic power generation device. [Background technology]

[0002] Conventionally, a photovoltaic power generation device (e.g., Patent Document 1) that generates power by receiving sunlight has been used. When the photovoltaic power generation device is provided on an installation surface, for example, as shown in Fig. 11(A), a frame member 100 is arranged so as to contact an outer edge portion 102 of the photovoltaic power generation device 101, and the frame member 100 is pressed against the installation surface 104 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] JP 2019-67924 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the rigidity of the installation surface 104 is low, the force with which the pressing member 103 presses the frame member 100 may damage the object (such as a building material) that constitutes the installation surface 104. For this reason, the above force cannot be increased, and a gap may occur between the frame member 100 and the outer edge portion 102 or between the frame member 100 and the installation surface 104. In particular, if the solar power generation device 101 is thin and has poor elasticity, the above force cannot be increased, and the frame member 100 and the solar power generation device 101 cannot be brought into close contact with each other, and a gap is likely to occur between the frame member 100 and the outer edge portion 102. If the above gap occurs, wind 200 (FIG. 11(B)) that passes through the gap blows between the solar power generation device 101 and the installation surface 104, and the solar power generation device vibrates violently due to the lifting force of the wind, resulting in a situation in which the solar power generation device 101 is damaged.

[0005] The present invention has been made in consideration of the above-mentioned matters, and its object is to provide a fixing device and an installation structure for a solar power generation device that can prevent wind from blowing in between the solar power generation device and the installation surface, thereby preventing the solar power generation device from vibrating due to uplift caused by the wind. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention includes the subject matter described in the following paragraphs.

[0007] Item 1. A fixture for fixing a solar power generation device to an installation surface, a frame member provided around the solar power generation device and disposed on an outer edge of the solar power generation device; A pressing member that presses the frame member against the installation surface; A fixing device comprising one or more elastic members arranged along the entire circumference of the solar power generation device between the frame member and the installation surface.

[0008] Item 2. The frame member has a shape in which one width side portion is bent relative to the other width side portion, the one width side portion is disposed on the outer edge portion of the solar power generation device, and the other width side portion is disposed outside the solar power generation device, 2. The fixture according to claim 1, further comprising one or more first elastic members arranged along an entire periphery of the solar power generation device between the other widthwise side portion and the installation surface.

[0009] Item 3. The device includes one first elastic member, The fastener according to claim 2, wherein the first elastic member is annular.

[0010] Item 4. A plurality of the first elastic members are provided, Item 3. A fixing device as described in item 2, wherein a plurality of the first elastic members are arranged on the inside and outside of a ring line that extends so as to surround the periphery of the solar power generation device, and the plurality of first elastic members arranged on the inside and outside of the ring line are continuous when viewed in a direction perpendicular to the ring line and along the front or back surface of the solar power generation device.

[0011] Item 5. The fixing device according to any one of items 2 to 4, wherein the first elastic member is provided integrally with the frame member.

[0012] Item 6. A fixing device according to any one of items 2 to 5, comprising one or more second elastic members arranged along the entire circumference of the solar power generation device between the one widthwise side portion and an outer edge of the solar power generation device.

[0013] Item 7. The fixture according to item 6, wherein the second elastic member is provided integrally with the frame member or the solar power generation device.

[0014] Item 8. The outer edge of the solar power generation device has a wavy shape in which an opposite side curved portion that is curved convexly toward the opposite side of the installation surface and an installation surface side curved portion that is curved convexly toward the installation surface side are alternately generated, Item 1. The fixing device according to item 1, comprising one or more first elastic members arranged along the entire circumference of the solar power generation device between the opposite side curved portion and the installation surface, and one or more second elastic members arranged along the entire circumference of the solar power generation device between the installation surface side curved portion and the frame member.

[0015] Item 9. The first elastic member is provided integrally with the solar power generation device, 9. The fixing device according to item 8, wherein the second elastic member is provided integrally with the frame member or the solar power generation device.

[0016] Item 10. The fixture according to claim 1, wherein the elastic member is disposed inside the outer edge of the solar power generation device.

[0017] Item 11. The fixing device according to any one of items 1 to 10, wherein the frame member is annular.

[0018] Item 12. The frame member is composed of a plurality of frames arranged in the circumferential direction of the solar power generation device, Each of the frames is disposed on an outer edge of the solar power generation device, The pressing member is provided for each of the frames, Item 11. The fixture according to any one of items 1 to 10, wherein each of the pressing members presses the corresponding frame toward the installation surface.

[0019] Item 13. Installation surface and A solar power generation device provided on the installation surface; a fixing device for fixing the solar power generation device, The fixing device is a frame member provided around the solar power generation device and disposed on an outer edge of the solar power generation device; A pressing member that presses the frame member against the installation surface; An installation structure for a solar power generation device comprising: one or more elastic members arranged along an entire periphery of the solar power generation device between the frame member and the installation surface.

[0020] Item 14. The installation structure for a photovoltaic power generation device according to item 13, wherein a bending strength of the photovoltaic power generation device is 10 MPa or more and 200 MPa or less.

[0021] Item 15. The installation structure for a photovoltaic power generation device according to item 13 or 14, wherein the photovoltaic power generation device has a flexural modulus of elasticity of 500 MPa or more and 10,000 MPa or less.

[0022] Item 16. The installation structure for a photovoltaic power generation device according to any one of Items 13 to 15, wherein a bending radius of the photovoltaic power generation device is 10 cm or less. Effect of the Invention

[0023] According to the present invention, it is possible to prevent wind from blowing in between the solar power generation device and the installation surface, thereby making it possible to prevent the solar power generation device from vibrating due to uplift caused by the wind. [Brief description of the drawings]

[0024] [Figure 1] 1 is a plan view showing an installation structure for a solar power generation device according to an embodiment of the present invention. [Diagram 2] 2A is a cross-sectional view showing the installation structure cut along line AA in FIG 1, and FIG 2B is a cross-sectional view showing the installation structure cut along line BB in FIG 1. [Diagram 3] 1A is a cross-sectional view showing a state where the solar power generation device is cut, FIG. 1B is an enlarged view of part a in FIG. 1A, and FIG. 1C is a cross-sectional view showing a state where the power generation unit is cut along line CC in FIG. 1A. [Figure 4] 1 is a plan view showing a state in which a frame member has been removed from an installation structure according to an embodiment of the present invention. [Diagram 5] 13 is a plan view showing a state in which a frame member has been removed from an installation structure according to a modified example of the present invention. FIG. [Figure 6] 13 is a plan view showing a state in which a frame member has been removed from an installation structure according to a modified example of the present invention. FIG. [Figure 7] 2A and 2B are cross-sectional views showing a state in which an installation structure according to a modified example of the present invention is cut, where (A) shows a cross-section corresponding to FIG. 2A, and (B) shows a cross-section corresponding to FIG. 2B. [Figure 8] 2A and 2B are cross-sectional views showing a state in which an installation structure according to a modified example of the present invention is cut, where (A) shows a cross-section corresponding to FIG. 2A, and (B) shows a cross-section corresponding to FIG. 2B. [Figure 9] 2A and 2B are cross-sectional views showing a state in which an installation structure according to a modified example of the present invention is cut, where (A) shows a cross-section corresponding to FIG. 2A, and (B) shows a cross-section corresponding to FIG. 2B. [Figure 10] FIG. 11 is a plan view showing an installation structure for a solar power generation device according to a modified example of the present invention. [Figure 11] 1A is a cross-sectional view showing a conventional installation structure for a solar power generation device, and FIG. 1B is a cross-sectional view showing a state in which wind blows between the solar power generation device and the installation surface in the conventional installation structure shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a plan view showing an installation structure 1 for a solar power generation device 3 according to an embodiment of the present invention. Fig. 2(A) is a cross-sectional view showing the state in which the installation structure 1 is cut along the line AA in Fig. 1. Fig. 2(B) is a cross-sectional view showing the state in which the installation structure 1 is cut along the line BB in Fig. 1.

[0026] 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 fastener 4 for fixing the solar power generation device 3.

[0027] The installation surface 2 is formed by the surface of a building material. Examples of the building material include roofing materials, wall materials (metal siding materials, ceramic siding materials, sandwich panels, etc.), partitions, door materials, fence materials, floor materials, etc. Examples of the roofing material include roofing materials used for folded plate roofs, slate roofs, roof decks, tile roofing, standing flat roofing, etc. The roof may be vertically or horizontally shingled. Note that the present invention does not limit the member having the installation surface 2 to the above-mentioned building materials, and the installation surface 2 may be formed by the surface of a pavement forming a road, or may be the surface of a structure such as an automobile, train, or ship. In the illustrated example, the installation surface 2 is a flat surface, but may be a curved surface. The material of the member constituting the installation surface 2 is not particularly limited, and may be, for example, metal, resin, asphalt, or concrete.

[0028] (Solar power generation device 3) Fig. 3(A) is a cross-sectional view showing a state where the solar power generation device 3 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 a state where the power generation unit is cut along line CC in Fig. 3(A).

[0029] The solar power generation device 3 has a power generation section 10 and a sealant 11 disposed between a barrier sheet 7 constituting the front surface 6 and a back sheet 9 constituting the back surface 8, and the sealant 11 is filled around the power generation section 10. A sealing edge material 12 is provided on the outer periphery of the solar power generation device 3 to seal between the barrier sheet 7 and the back sheet 9. In the solar power generation device 3, light irradiated to the front surface 6 is incident on the power generation section 10, and the power generation section 10 generates electricity.

[0030] The solar power generation device 3 has a sheet shape. In this specification, "sheet shape" refers to a shape in which the thickness of the object is 10% or less of the maximum length between the outer edges in a planar view. For example, when the shape in a planar view is rectangular, "the maximum length between the outer edges in a planar view" refers to the length of the diagonal. Also, for example, when the shape in a planar view is circular, "the maximum length between the outer edges in a planar view" refers to the length of the diameter. In this specification, "sheet shape" also includes membrane, foil, film, and the like.

[0031] The solar power generation device 3 is formed in a generally rectangular shape when viewed from the front. However, the present invention does not particularly limit the shape of the solar power generation device 3, and the solar power generation device 3 may be, for example, generally circular, elliptical, or polygonal in plan view.

[0032] The photovoltaic power generation device 3 has flexibility (the property that an object can bend). In the present invention, the photovoltaic power generation device 3 has flexibility means that the photovoltaic power generation device 3 has a bending strength of 10 MPa or more, or that the photovoltaic power generation device 3 has a bending modulus of 100 MPa or more. The bending strength of the photovoltaic power generation device 3 is more preferably 20 MPa or more, more preferably 50 MPa or more. The bending strength of the photovoltaic power generation device 3 is preferably 200 MPa or less, more preferably 150 MPa or less, and more preferably 50 MPa or less. The bending modulus of the photovoltaic power generation device 3 is more preferably 500 MPa or more. The bending modulus of the photovoltaic power generation device 3 is preferably 10000 MPa or less, more preferably 5000 MPa or less. When the flexibility of the photovoltaic power generation device 3 is evaluated by the bending strength, the bending modulus may not be within the above range. When the flexibility of the photovoltaic power generation device 3 is evaluated by the bending modulus of elasticity, the bending strength may not be within the above range. The bending strength and bending elastic modulus of the solar power generation device 3 are measured in accordance with JIS K 7171. The bending radius of the solar power generation device 3 is preferably 10 cm or less. The bending radius of the solar power generation device 3 is measured using an R caliper (radius measuring device) or the like.

[0033] (Back seat 9) The back sheet 9 has a barrier property against water vapor and a protective property against external forces. The back sheet 9 may have light-transmitting properties, but does not necessarily have to have light-transmitting properties. In this specification, "light-transmitting properties" means that the light transmittance is greater than 15% with respect to the peak wavelength of light before incidence. Examples of materials for the back sheet 9 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, vinyl resins (e.g., polyvinyl chloride), natural resins, rubber, metals, carbon, and pulp.

[0034] The modulus of longitudinal elasticity of the back sheet 9 is preferably 2400 MPa or more, more preferably 3000 MPa or more. The modulus of longitudinal elasticity of the back sheet 9 is preferably 4200 MPa or less, more preferably 3100 MPa or less. Examples of the material of the back sheet 9 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, and vinyl resins (e.g., polyvinyl chloride). Examples of the material of the back sheet 9 that may be used include natural resins, rubber, metals, carbon, and pulp, in addition to synthetic resins.

[0035] The thickness of the back sheet 9 is preferably 50 μm or more, and more preferably 100 μm or more, and is preferably 2000 μm or less, and more preferably 1000 μm or less.

[0036] (Power Generation Section 10) The power generation section 10 includes a power generation cell 20, which is a photoelectric conversion element that utilizes the photovoltaic effect. In this embodiment, the power generation section 10 is configured as a photoelectric conversion unit in which a plurality of power generation cells 20 are arranged in the surface direction of the solar power generation device 3 (for example, in the longitudinal direction or width direction of the solar power generation device 3). Note that the power generation section 10 may be configured with a single power generation cell 20.

[0037] (Power generating cell 20) The power generating cell 20 includes a light-transmitting substrate 21, a light-transmitting conductive layer 22, a power generating layer 23, and an electrode 24. The light-transmitting substrate 21, the light-transmitting conductive layer 22, the power generating layer 23, and the electrode 24 are laminated in this order along a direction from the barrier sheet 7 toward the back sheet 9. That is, they are disposed so that the light-transmitting substrate 21 faces the barrier sheet 7, and the electrode 24 faces the back sheet 9.

[0038] (Transparent base material 21) The light-transmitting substrate 21 supports the light-transmitting conductive layer 22, the power generation layer 23, and the electrode 24. The light-transmitting substrate 21 has light-transmitting properties. The light-transmitting properties of the light-transmitting substrate 21 may be such that the light transmittance is greater than 15% with respect to the peak wavelength of light before incidence, but is preferably 50% or more, and more preferably 80% or more. In this specification, a light transmittance of 80% or more with respect to the peak wavelength of light before incidence is defined as "transparent."

[0039] Examples of materials for the light-transmitting substrate 21 include inorganic materials, organic materials, and metal materials. Examples of inorganic materials include quartz glass and non-alkali glass. Examples of organic materials include plastics such as polyethylene terephthalate (PET), polyethylene naphthalene (PEN), polyethylene, polyimide, polyamide, polyamideimide, liquid crystal polymer, and cycloolefin polymer, as well as polymer films. Examples of metal materials include stainless steel, aluminum, titanium, and silicon.

[0040] There are no particular limitations on the thickness of the light-transmitting substrate 21 as long as it can support the light-transmitting conductive layer 22, the power generation layer 23, and the electrodes 24, and the thickness may be, for example, 10 μm or more and 300 μm or less.

[0041] The light-transmitting base material 21 is a base material that is required in the manufacturing process of the power generating cell 20, but is not necessarily a necessary component. The light-transmitting base material 21 may be used, for example, only during the manufacturing process of the solar power generation device 3, or may be removed after or during the manufacturing process. When removed, a base material that does not have light-transmitting properties may be used instead of the light-transmitting base material 21.

[0042] (Transparent conductive layer 22) The transparent conductive layer 22 is a layer having electrical conductivity and functions as a cathode. The transparent conductive layer 22 has light transmitting properties. The transparent conductive layer 22 is preferably transparent.

[0043] Examples of the transparent conductive layer 22 include transparent materials such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), NESA film, etc. The transparent conductive layer 22 is formed on the surface of the transparent substrate by, for example, a sputtering method, an ion plating method, a plating method, a coating method, etc.

[0044] The light-transmitting conductive layer 22 may be configured to have light-transmitting properties by forming a light-transmitting pattern using an opaque material. Examples of the opaque material include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, and alloys containing these. Examples of the light-transmitting pattern include a lattice shape, a line shape, a wavy line shape, a honeycomb shape, and a round hole shape.

[0045] The thickness of the transparent conductive layer 22 is preferably, for example, 30 nm or more and 300 nm or less. When the transparent conductive layer 22 is 30 nm or more and 300 nm or less, good conductivity can be obtained while maintaining high flexibility.

[0046] (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 translucent conductive layer 22 toward the electrode 24.

[0047] (Hole transport layer 30) The hole transport layer 30 extracts holes generated in the photoelectric conversion layer 31 to the light-transmitting conductive layer 22, and prevents electrons generated in the photoelectric conversion layer 31 from moving to the light-transmitting conductive layer 22. For example, a metal oxide can be used as the material of the hole transport layer 30. For example, titanium oxide, molybdenum oxide, vanadium oxide, zinc oxide, nickel oxide, lithium oxide, calcium oxide, cesium oxide, aluminum oxide, etc. may be used as the metal oxide. In addition, delafossite type compound semiconductor (CuGaO2), copper oxide, copper thiocyanate (CuSCN), vanadium pentoxide (VO5), graphene oxide, etc. may also be used. In addition, a p-type organic semiconductor or a p-type inorganic semiconductor may also be used as the material of the hole transport layer 30.

[0048] The thickness of the hole transport layer 30 is, for example, preferably 1 nm to 1000 nm, more preferably 10 nm to 500 nm, and even more preferably 10 nm to 50 nm. If the thickness of the hole transport layer 30 is 1 nm to 1000 nm, the transport of holes can be realized.

[0049] (Photoelectric conversion layer 31) The photoelectric conversion layer 31 (photoactive layer) is a layer that converts absorbed light into electricity. There are no particular limitations on the material of the photoelectric conversion layer 31 as long as it can convert absorbed light into electricity, and for example, amorphous silicon, perovskite, non-silicon-based materials (semiconductor material CIGS), etc. are used. The photoelectric conversion layer 31 may also have a tandem-type laminated structure that combines these materials. The photoelectric conversion layer 31 using a non-silicon-based material uses the semiconductor material CIGS containing copper (Cu), indium (In), gallium (Ga), and selenium (Se), which makes it easy to reduce the thickness of the photoelectric conversion layer.

[0050] In the following, as an example of a case where the power generating unit 10 contains an organic component, a case where a perovskite compound containing an organic component is contained in the photoelectric conversion layer 31 of the power generating unit 10 will be described. The photoelectric conversion layer 31 containing a perovskite compound has the advantage that the dependency of the power generating efficiency on the angle of incident light (hereinafter, sometimes referred to as the incidence angle dependency) is relatively low. As a result, in this embodiment, a higher power generating efficiency can be obtained.

[0051] The perovskite compound is a structure having a perovskite crystal structure or 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 to these.

[0052] The organic group of the organic cation constituting the A site is not particularly limited, and examples thereof include alkylammonium derivatives, formamidinium derivatives, etc. The organic cation constituting the A site may be of one type or of two or more types.

[0053] 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.

[0054] The halogen of the halogen anion constituting the X site is not particularly limited, and examples thereof include F, Cl, Br, and I. The halogen anion constituting the X site may be of one type or of two or more types.

[0055] The thickness of the photoelectric conversion layer 31 is, for example, preferably 1 nm or more and 1,000,000 nm or less, more preferably 100 nm or more and 50,000 nm or less, and further preferably 300 nm or more and 1,000 nm or less. When the thickness of the photoelectric conversion layer 31 is 1 nm or more and 1,000,000 nm or less, the photoelectric conversion efficiency is improved.

[0056] (Electron transport layer 32) The electron transport layer 32 extracts electrons generated in the photoelectric conversion layer 31 to the electrode 24, and prevents holes generated in the photoelectric conversion layer 31 from moving to the electrode 24. The electron transport layer 32 preferably contains, for example, either a halogen compound or a metal oxide.

[0057] Examples of halogen compounds include lithium halides (LiF, LiCl, LiBr, LiI) and sodium halides (NaF, NaCl, NaBr, NaI). Examples of elements constituting metal oxides include titanium, molybdenum, vanadium, zinc, nickel, lithium, potassium, cesium, aluminum, niobium, tin, and barium. In addition, an n-type organic semiconductor or an n-type inorganic semiconductor can also be used as the material of the electron transport layer 32.

[0058] The thickness of the electron transport layer 32 is, for example, preferably 1 nm or more and 1000 nm or less, more preferably 10 nm or more and 500 nm or less, and even 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, electron transport can be realized.

[0059] (electrode 24) The electrode 24 has electrical conductivity and functions as an anode. The electrode 24 can extract electrons from the photoelectric conversion layer 31 in response to photoelectric conversion caused by the photoelectric conversion layer 31. The electrode 24 may be formed of a light-transmitting material or a light-opaque material. However, if the electrode 24 is formed of a light-opaque material, the light blocking property of the solar power generation device 3 can be further improved (i.e., light from the opposite side of the surface 6 can be further prevented from entering the power generation unit 10). Examples of materials for the electrode 24 include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, and alloys containing these metals.

[0060] (Barrier Sheet 7) The barrier sheet 7 has light-transmitting properties and constitutes the surface 6 of the photovoltaic power generation device 3 as described above. The barrier sheet 7 is preferably transparent. The barrier sheet 7 has a barrier property against water vapor and a protective property against external forces.

[0061] The barrier sheet 7 has flexibility. The material used for the barrier sheet 7 preferably has a modulus of longitudinal elasticity 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 for the barrier sheet 7 include a plastic film, a vinyl film, and the like.

[0062] The thickness of the barrier sheet 7 is preferably 50 μm or more, and more preferably 100 μm or more. The thickness of the barrier sheet 7 is preferably 2000 μm or less, and more preferably 1000 μm or less. When the thickness of the barrier sheet 7 is 50 μm or more and 2000 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.

[0063] (Sealant 11) The sealant 11 prevents water from entering the power generation layer 23 from around the power generation layer 23. The sealant 11 has light-transmitting properties and is preferably transparent. The sealant 11 does not necessarily need to cover the entire power generation section 10. For example, when a part of the power generation section 10 is exposed from the sealant 11, the exposed part may be covered with a sealing edge material 12 or the like.

[0064] Examples of the material of the sealant 11 include ethylene vinyl acetate (EVA), polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, SBS resin, SIBS resin, and epoxy resin.

[0065] The transverse elastic modulus of the sealant 11 is preferably 0.01 to 500 MPa, more preferably 0.05 to 250 MPa, and even more preferably 0.1 to 100 MPa. In this manner, the sealant 11 deforms in the planar direction in response to thermal expansion and contraction caused by the temperature difference between the back sheet 9 and the barrier sheet 7. This makes it possible to prevent the back sheet 9 and the barrier sheet 7 from peeling off from the sealant 11 due to shear stress caused by thermal expansion and contraction. The "transverse elastic modulus" referred to in this application is a value calculated from, for example, the longitudinal elastic modulus and the Poisson's ratio obtained by a tensile test method.

[0066] From another viewpoint, the viscosity of the sealant 11 can also be specified. The viscosity of the sealant 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 even more preferably 40000 mPa·S or more and 110000 mPa·S or less.

[0067] In this case, examples of the material of the sealant 11 include polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, etc. In this specification, the "viscosity" is a value measured at an environmental temperature of 23°C in accordance with the rotational viscometer method of JIS Z8803.

[0068] The back sheet 9 and the barrier sheet 7 are bonded via the sealant 11, and the adhesive strength is preferably 0.1 N / 10 mm or more and 10 N / 10 mm or less in a peel test. In particular, when the solar power generation device 3 is installed in a bent state, the shear stress generated in the solar power generation device 3 becomes larger, so by adopting an adhesive strength in the above range in the peel test, peeling can be effectively suppressed for a long period of time. The peel test is performed in accordance with JIS Z 0237.

[0069] From the viewpoint of enhancing the effect of preventing peeling, the thickness of the sealant 11 is preferably 10 μm or more, more preferably 30 μm or more, and even 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 even more preferably 100 μm or less. By making the thickness of the sealant 11 10 μm or more, it is possible to sufficiently secure the escape allowance for the shear stress during thermal expansion and contraction. By making the thickness of the sealant 11 300 μm or less, it is possible to reduce the weight of the solar power generation device 3, thereby improving the workability and ease of installation.

[0070] The sealant 11 is not necessarily required and may not be provided. When the sealant 11 is not provided, the solar power generation device 3 is, for example, configured such that only the power generation section 10 is disposed between the barrier sheet 7 and the back sheet 9, and the barrier sheet 7 and the back sheet 9 are each bonded to the power generation section 10.

[0071] (Sealing edge material 12) The sealing edge material 12 has a structure in which a first adhesive portion 40 that is adhered to the "surface of the barrier sheet 7 that constitutes the front surface 6", a sealing portion 41 that seals between the barrier sheet 7 and the back sheet 9, and a second adhesive portion 42 that is adhered to the "surface of the back sheet 9 that constitutes the back surface 8" are sequentially connected.

[0072] The material of the sealing edge material 12 may be, for example, a tape material made of butyl rubber, silicone rubber, or the like.

[0073] The sealing edge material 12 is not necessarily required. For example, the edge of the barrier sheet 7 may be folded toward the back sheet 9, and the folded tip may be joined to the back sheet 9. Alternatively, the edge of the back sheet 9 may be folded toward the barrier sheet 7, and the folded tip may be joined to the barrier sheet 7. If this is done, the sealing edge material 12 will not be necessary.

[0074] (Action of solar power generation device 3) In the solar power generation device 3 described above, when light irradiated onto the surface 6 enters the power generation section 10, the photoelectric conversion layer 31 of the power generation layer 23 absorbs the light and performs photoelectric conversion, generating electrons and holes in the photoelectric conversion layer 31. The electrons are extracted to the electrode 24 (anode) via the electron transport layer 32, and the holes are extracted to the translucent conductive layer 22 (cathode) via the hole transport layer 30, causing a current to flow from the translucent conductive layer 22 to the electrode 24 (i.e., power generation is performed).

[0075] In the photoelectric conversion unit constituting the power generation section 10, an extension 24a is provided on the electrode 24 (anode) of each power generation cell 20 (FIG. 3(C)). The extension 24a of the electrode 24 extends toward the translucent conductive layer 22 (cathode). In two adjacent power generation cells 20, 20, the extension 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 solar power generation device 3 is irradiated with light, a current flows from the translucent conductive layer 22A at one end of the power generation section 10 (photoelectric conversion unit) to the electrode 24A at the other end of the power generation section 10 (the current flow is indicated by an arrow in FIG. 3(C)). The current is taken out via a power distribution line (not shown).

[0076] By configuring the power generation section 10 from the above-mentioned photoelectric conversion unit, even if a malfunction occurs in some of the power generation cells 20, the amount of electricity extracted from the power generation section 10 can be stabilized.

[0077] Instead of providing the extension 24a on the electrode 24 (anode) of each power generating cell 20, an extension extending toward the electrode 24 (anode) may be provided on the translucent conductive layer 22 (cathode) of each power generating cell 20. In this case, between two adjacent power generating cells 20, 20, the extension of the translucent conductive layer 22 of one cell 20 is joined to the electrode 24 of the other cell 20. In this manner, the same effect as above can be obtained.

[0078] Furthermore, when the power generation section 10 is provided with a translucent base material 21, from the viewpoint of facilitating the manufacture of the power generation section 10, it is preferable to support the translucent conductive layer 22, the power generation layer 23, and the electrode 24 of each power generation cell 20 on a common translucent base material 21, as shown in FIG. 3(C).

[0079] Furthermore, when the power generating section 10 is composed of one power generating cell 20, the current flowing from the electrode 24 to the translucent conductive layer 22 is taken out via a power distribution line.

[0080] 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 planar direction of the solar power generation device 3 and are electrically connected in series or in parallel.

[0081] When the power generation sections 10 are composed of photoelectric conversion units, in order to connect a plurality of power generation sections 10 in series, the translucent conductive layer 22A at an end of one of the power generation sections 10 and the electrode 24A at an end of the other power generation section 10 are connected via a power distribution line in two adjacent power generation sections 10, 10. When connecting a plurality of power generation sections 10 in parallel, the translucent conductive layers 22A at the ends of two adjacent power generation sections 10, 10 and the electrodes 24A at the ends of the two adjacent power generation sections 10, 10 are connected via power distribution lines, respectively.

[0082] Furthermore, when the power generation unit 10 is composed of one power generation cell 20, in order to connect a plurality of power generation units 10 in series, the translucent conductive layer 22 of one of the power generation units 10 and the electrode 24 of the other power generation unit 10 are connected via a power distribution line in two adjacent power generation units 10, 10. 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 connected via power distribution lines, respectively.

[0083] In addition, whether the power generation section 10 is composed of the above-mentioned photoelectric conversion unit or one power generation cell 20, the distance between adjacent power generation sections 10, 10 may be more than 0 mm, and is preferably 2 mm or more, more preferably 5 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. In addition, the distance between adjacent power generation sections 10, 10 is preferably 100 mm or less, more preferably 50 mm or less, and even more preferably 20 mm or less.

[0084] (fixture 4) The fixture 4 (FIGS. 1 and 2) includes a frame member 50, a pressing member 51, and an elastic member 52.

[0085] 1, frame member 50 has an annular shape and is provided around solar power generation device 3. As shown in Fig. 2, frame member 50 has a cross-sectional shape in which one widthwise side portion 53 is bent toward the other widthwise side portion 54, and one widthwise side portion 53 is disposed on outer edge portion 13 of solar power generation device 3, and the other widthwise side portion 54 is disposed outside solar power generation device 3.

[0086] The frame member 50 is made 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. Furthermore, when the frame member 50 is made of resin, it is preferable that the color of the frame member 50 is black in order to increase the weather resistance of the frame member 50.

[0087] The elastic member 52 is disposed along the entire periphery of the solar power generation device 3 between the other widthwise side portion 54 of the frame member 50 and the installation surface 2. In this specification, "elastic" means that the longitudinal elastic modulus is 4000 MPa or less.

[0088] 4 is a plan view showing a state in which the frame member 50 (FIGS. 1 and 2) has been removed from the installation structure 1 according to this embodiment. As shown in FIG. 4, the elastic member 52 has an annular shape in the plan view, and the solar power generation device 3 is located inside the elastic member 52.

[0089] The elastic member 52 can be made of rubber or resin, but is preferably made of rubber. Examples of resins that can be used to form the elastic member 52 include PP (polypropylene) and PE (polyethylene). Examples of rubbers that can be used to form the elastic member 52 include NBR (nitril-butadiene rubber), SBR (styrene-butadiene rubber), silicone rubber, and butyl rubber. 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, the elastic member 52 and the frame member 50 are bonded to each other using an adhesive of a resin composition containing at least one selected from, for example, 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.

[0090] The pressing member 51 is a member that presses the frame member 50 toward the installation surface 2. The elastic member 52 is in a compressed state by the pressure applied by the pressing member 51 to the frame member 50. In this embodiment, as shown in FIG. 2(B), the pressing member 51 is configured by a metal or resin bolt or rivet having a small-diameter shaft portion 56 extending from a large-diameter head portion 55. The head portion 55 is pressed against the frame member 50 by inserting the tip side of the shaft portion 56 penetrating the other width side portion 54 of the frame member 50 and the elastic member 52 below the installation surface 2 (the hole of the elastic member 52 through which the shaft portion 56 passes is omitted in FIG. 4 and FIGS. 5 and 6 described later). The head portion 55 may be pressed against the frame member 50 by inserting the tip side of the shaft portion 56 penetrating the one width side portion 53 of the frame member 50 and the outer edge portion 13 of the solar power generation device 3 below the installation surface 2. The number and installation positions of the pressing members 51 are set appropriately depending on the shape of the frame member 50, etc. When a plurality of pressing members 51 are provided as shown in Fig. 1, it is preferable to arrange the pressing members 51 at equal intervals in the circumferential direction of the frame member 50. The pressing members 51 may be constituted by clamps that clamp the frame member 50 and the "object (such as a building material) that constitutes the installation surface 2".

[0091] (Action and effect) According to the fixing device 4 and the installation structure 1 of this embodiment, the elastic member 52 is disposed between the frame member 50 and the installation surface 2, so that even if the force with which the pressing member 51 presses the frame member 50 is increased, damage to the object (such as a building material) constituting the installation surface 2 can be suppressed. Therefore, the above-mentioned "force with which the pressing member 51 presses the frame member 50" can be increased, so that the solar power generation device 3 is pressed strongly against the installation surface 2, and a gap can be suppressed from being generated between the solar power generation device 3 and the installation surface 2. Therefore, wind can be suppressed from blowing in between the solar power generation device 3 and the installation surface 2, so that the solar power generation device 3 can be suppressed from vibrating due to the lifting force of the wind. Therefore, a situation in which the solar power generation device 3 is damaged due to vibration can be avoided.

[0092] Furthermore, according to the fastener 4 and installation structure 1 of this embodiment, the elastic member 52 has an annular shape, and therefore the elastic member 52 can also prevent wind from blowing between the solar power generation device 3 and the installation surface 2.

[0093] The present invention is not limited to the above embodiment, and can be modified in various ways. Modifications of the present invention will be described below. In the following description, differences from the above embodiment will be described, and the same reference numerals will be used to denote common points with the above embodiment, and description thereof will be omitted.

[0094] For example, in the above embodiment, the fixing device 4 (FIG. 2) includes one annular elastic member 52, but the fixing device 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 arranged between the other widthwise side portion 54 of the frame member 50 and the installation surface 2, and are compressed by the pressure of the pressing member 51). The above "arrangement of a plurality of elastic members 52 along the entire circumference of the solar power generation device 3" also 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 ends of two adjacent elastic members 52, 52 are butted against each other, and a case where one or a plurality of elastic members 52 are arranged on the inside and outside of a ring line K that extends so as to surround the periphery of the solar power generation device 3, as shown in FIGS. 5 and 6, and "the elastic members 52 arranged on the inside and outside of the ring line K" are continuous when viewed "along the front surface 6 or back surface 8 of the solar power generation device 3 and in a direction perpendicular to the ring line K". By arranging multiple elastic members 52 as described above, it is possible to prevent the creation of a straight-line wind path between the solar power generation device 3 and the installation surface 2, thereby suppressing deterioration of the solar power generation device 3 due to condensation caused by temperature changes.

[0095] 5 shows an example in which the fixing device 4 (FIG. 2) includes elastic members 52A and 52B arranged inside a circular line K1 that extends so as to surround the periphery of the solar power generation device 3, and elastic members 52C, 52D, 52E, and 52F arranged outside the circular line K1. The elastic members 52A, 52B, 52D, and 52F each extend in the longitudinal direction of the solar power generation device 3, the elastic members 52A and 52D are arranged on one side in the width direction of the solar power generation device 3, and the elastic members 52B and 52F are arranged on the other side in the width direction of the solar power generation device 3. The elastic members 52C and 52E each extend in the width direction of the solar power generation device 3, the elastic member 52C is arranged on one side in the longitudinal direction of the solar power generation device 3, and the elastic member 52E is arranged on the other side in the longitudinal direction of the solar power generation device 3. Then, the width direction one side end 52Ca of the elastic member 52C is butted against the longitudinal direction one side end 52Da of the elastic member 52D, the width direction other side end 52Cb of the elastic member 52C is butted against the longitudinal direction one side end 52Fa of the elastic member 52F, the width direction one side end 52Ea of the elastic member 52E is butted against the longitudinal direction other side end 52Aa of the elastic member 52A, and the width direction other side end 52Eb of the elastic member 52E is butted against the longitudinal direction other side end 52Ba of the elastic member 52B. Then, in a side view seen in the width direction, the longitudinal direction other side end 52Db of the elastic member 52D and the longitudinal direction one side end 52Ab of the elastic member 52A overlap, and the longitudinal direction other side end 52Fb of the elastic member 52F and the longitudinal direction one side end 52Bb of the elastic member 52B overlap. By arranging the elastic members 52A, 52E, 52B, 52C, 52D, and 52F as described above, they are connected when viewed in a direction perpendicular to the circular line K1 and along the front surface 6 or back surface 8 of the solar power generation device 3 (for example, the elastic members 52D and 52A are connected when viewed in the above direction because the ends 52Db and 52Ab overlap as described above), and no wind path is created that passes in a straight line between the solar power generation device 3 and the installation surface 2 (Figure 5 shows a straight line T1 that extends from a position between the elastic members 52A and 52D to pass through the solar power generation device 3, and by positioning the elastic member 52C at a position on the straight line T1 beyond the solar power generation device 3, no wind path is created that passes along the straight line T1 between the solar power generation device 3 and the installation surface 2).

[0096] 6 shows an example in which the fixing device 4 (FIG. 2) includes elastic members 52G, 52H extending in the width direction of the solar power generation device 3 and first to fourth groups 90-93 each consisting of a plurality of elastic members 52 arranged in the longitudinal direction of the solar power generation device 3, the second group 91 and the third group 92 are arranged inside a circular line K2 extending so as to surround the periphery of the solar power generation device 3, and the elastic members 52G, 52H, the first group 90, and the fourth group 93 are arranged outside the circular line K2. The elastic member 52G is arranged on one side in the longitudinal direction of the solar power generation device 3, the elastic member 52H is arranged on the other side in the longitudinal direction of the solar power generation device 3, the first group 90 and the second group 91 are arranged on one side in the width direction of the solar power generation device 3, and the third group 92 and the fourth group 93 are arranged on the other side in the width direction of the solar power generation device 3. The other longitudinal side end 52Ia of the elastic member 52I which is furthest on the other longitudinal side in the first group 90 is abutted against the other width side end 52Ha of the elastic member 52H, the one longitudinal side end 52Ja of the elastic member 52J which is furthest on the other longitudinal side in the second group 91 is abutted against the one width side end 52Ga of the elastic member 52G, the other longitudinal side end 52La of the elastic member 52L which is furthest on the other longitudinal side in the third group 92 is abutted against the other width side end 52Hb of the elastic member 52H, and the one longitudinal side end 52Ma of the elastic member 52M which is furthest on the one longitudinal side in the fourth group 93 is abutted against the other width side end 52Gb of the elastic member 52G. In side view in the width direction, the other longitudinal end portions of each elastic member 52 of the first group 90 except for the above-mentioned "end portion 52Ia of elastic member 52I" overlap with one longitudinal end portion of the elastic member 52 of the second group 91, the one longitudinal end portion of each elastic member 52 of the second group 91 except for the above-mentioned "end portion 52Ja of elastic member 52J" overlap with the other longitudinal end portion of the elastic member 52 of the first group 90, the other longitudinal end portions of each elastic member 52 of the third group 92 except for the above-mentioned "end portion 52La of elastic member 52L" overlap with one longitudinal end portion of the elastic member 52 of the fourth group 93, and the one longitudinal end portion of each elastic member 52 of the fourth group 93 except for the above-mentioned "end portion 52Ma of elastic member 52M" overlap with the other longitudinal end portion of the elastic member 52 of the third group 92.By arranging elastic members 52G, 52H and the multiple elastic members 52 included in the first to fourth groups 90-93 as described above, they are connected when viewed in a direction "orthogonal to the circular line K2 and along the front surface 6 or back surface 8 of the solar power generation device 3", so that no wind path is created that passes in a straight line between the solar power generation device 3 and the installation surface 2 (Figure 6 shows a straight line T2 that extends from a position between elastic members 52J, 52K to pass through the solar power generation device 3, and by positioning elastic member 52N at a position on the straight line T2 beyond the solar power generation device 3, no wind path is created that passes along the straight line T2 between the solar power generation device 3 and the installation surface 2).

[0097] The installation structure of the present invention can also be modified as shown in Figures 7 to 9 (Figures 7, 8, and 9 (A) and (B) are cross-sectional views showing a cut state of an installation structure relating to a modified example of the present invention, where (A) of Figures 7, 8, and 9 shows a cross-section corresponding to Figure 2(A) (a cross-section at a position where the pressing member is not provided), and (B) of Figures 7, 8, and 9 shows a cross-section corresponding to Figure 2(B) (a cross-section at a position where the pressing member is provided)).

[0098] 7 includes an installation surface 2, a solar power generation device 3, and a fastener 61 for fastening the solar power generation device 3. In addition to the frame member 50, pressing member 51, and elastic member 52 shown in the above embodiment, the fastener 61 includes one or more elastic members 62 arranged along the entire periphery of the solar power generation device 3 between one widthwise side portion 53 of the frame member 50 and the outer edge portion 13 of the solar power generation device 3. The elastic member 62 is formed from the same material as the elastic member 52 shown in the embodiment.

[0099] When the fixing device 61 has one elastic member 62, the annular elastic member 62 is arranged along the entire circumference of the solar power generation device 3 in order to prevent wind from blowing between the frame member 50 and the outer edge portion 13 of the solar power generation device 3.

[0100] Furthermore, when the fixing device 61 includes a plurality of elastic members 62 (i.e., when a plurality of elastic members 62 are arranged along the entire circumference of the solar power generation device 3), from the viewpoint of suppressing wind from blowing between the frame member 50 and the outer edge portion 13 of the solar power generation device 3, the plurality of elastic members 62 are sequentially arranged in the circumferential direction of the solar power generation device 3, and the ends of two adjacent elastic members 62, 62 are butted against each other. Alternatively, one or a plurality of elastic members 62 are arranged on the inside and outside of a ring line extending along the periphery of the solar power generation device 3, and the "elastic members 62 arranged on the inside and outside of the ring line" are connected together when viewed in "a direction perpendicular to the ring line and along the front surface 6 or back surface 8 of the solar power generation device 3".

[0101] Furthermore, the elastic member 62 may be provided integrally with the frame member 50 or the solar power generation device 3, or may not be integrated with the frame member 50 and the solar power generation device 3. When the elastic member 62 and the frame member 50 or the solar power generation device 3 are integrated, the elastic member 62 and the frame member 50 or the solar power generation device 3 are bonded together using an adhesive such as a resin composition containing at least one selected from the group consisting of 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.

[0102] Furthermore, one or more protrusions (not shown) protruding toward the solar power generation device 3 may be provided on the surface of the elastic member 62 facing the solar power generation device 3. The protrusions are provided as wind-stopping points. Providing the protrusions makes the design easier and also reduces material costs.

[0103] According to the modified example of FIG. 7, in addition to obtaining the same effects as those of the above-described embodiment, the elastic member 62 is disposed between one widthwise side portion 53 of the frame member 50 and the outer edge portion 13 of the solar power generation device 3, so that even if the force with which the pressing member 51 presses the frame member 50 is increased, damage to the solar power generation device 3 can be suppressed.

[0104] 8 includes an installation surface 2, a solar power generation device 3, and a fastener 71 for fastening the solar power generation device 3. The fastener 71 includes a frame member 72, a pressing member 73, and elastic members 74 and 75.

[0105] In the installation structure 70, the outer edge portion 13 of the solar power generation device 3 has a wavy shape with alternating opposite side curved portions 13a that are convexly curved toward the opposite side of the installation surface 2 and installation surface side curved portions 13b that are convexly curved toward the installation surface 2 side.

[0106] The frame member 72 has an annular shape in a plan view, and is made of the same material as the frame member 50 shown in the above embodiment. The frame member 72 is provided around the solar power generation device 3, and the entire frame member 72 is disposed on the outer edge portion 13 of the solar power generation device 3.

[0107] The elastic members 74, 75 are formed from the same material as the elastic member 52 shown in the above embodiment, and one or more elastic members 74 are arranged along the entire circumference of the solar power generation device 3 between the opposite side curved portion 13a and the installation surface 2, and one or more elastic members 75 are arranged along the entire circumference of the solar power generation device 3 between the installation surface side curved portion 13b and the frame member 72. When a plurality of the curved portions 13a, 13b are formed, the fixing device 71 includes one or more elastic members 74 arranged along the entire circumference of the solar power generation device 3 between the opposite side curved portion 13a and the installation surface 2, and one or more elastic members 75 arranged along the entire circumference of the solar power generation device 3 between the installation surface side curved portion 13b and the frame member 72.

[0108] When one elastic member 7 is arranged between the opposite curved portion 13a and the installation surface 2, the shape of the elastic member 74 is made annular in order to prevent wind from blowing between the solar power generation device 3 and the installation surface 2.

[0109] When multiple elastic members 74 are arranged between the opposite curved portion 13a and the installation surface 2, from the viewpoint of suppressing wind from blowing between the solar power generation device 3 and the installation surface 2, the multiple elastic members 74 are sequentially arranged in the circumferential direction of the solar power generation device 3, and the ends of two adjacent elastic members 74, 74 are butted against each other. Alternatively, one or multiple elastic members 74 are arranged on the inside and outside of a ring line extending along the periphery of the solar power generation device 3, and the "elastic members 74 arranged on the inside and outside of the ring line" are connected together when viewed in "a direction perpendicular to the ring line and along the front surface 6 or back surface 8 of the solar power generation device 3".

[0110] When one elastic member 75 is arranged between the installation surface side curved portion 13b and the frame member 72, the shape of the elastic member 74 is made annular from the viewpoint of tightly adhering the entire circumference of the frame member 72 and the entire circumference of the solar power generation device 3 to the elastic member 75.

[0111] When multiple elastic members 74 are disposed between the installation surface side curved portion 13b and the frame member 72, from the viewpoint of bringing the entire circumference of the frame member 72 and the entire circumference of the solar power generation device 3 into close contact with the elastic members 75, the multiple elastic members 75 are sequentially disposed in the circumferential direction of the solar power generation device 3, and the ends of two adjacent elastic members 75, 75 are butted against each other. Alternatively, one or multiple elastic members 75 are disposed on the inside and outside of a ring line extending so as to surround the periphery of the solar power generation device 3, and the "elastic members 75 disposed on the inside and outside of the ring line" are connected together when viewed in "a direction perpendicular to the ring line and along the front surface 6 or back surface 8 of the solar power generation device 3".

[0112] Furthermore, the elastic member 74 may be provided integrally with the solar power generation device 3, or may not be integrated with the solar power generation device 3. Furthermore, the elastic member 75 may be provided integrally with the frame member 72 or the solar power generation device 3, or may not be integrated with the frame member 72 and the solar power generation device 3. The integration is achieved by adhesion using 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.

[0113] The pressing member 73 (FIG. 8(B)) is a member that presses the frame member 72 against the installation surface 2. Each of the elastic members 74 and 75 is compressed by the pressure applied by the pressing member 73 to the frame member 72. In the illustrated example, the pressing member 73 is configured by a metal or resin bolt or rivet having a small diameter shaft portion 77 extending from a large diameter head portion 76. The frame member 72 is pressed against the installation surface 2 by inserting the tip side of the shaft portion 77 penetrating the frame member 72, the elastic member 75, and the installation surface side curved portion 13b below the installation surface 2 and pressing the head portion 76 against the frame member 72. The head portion 76 may be pressed against the frame member 72 by inserting the tip side of the shaft portion 77 penetrating the frame member 72, the opposite curved portion 13a, and the elastic member 74 below the installation surface 2. The number and installation positions of the pressing members 73 are appropriately set according to the shape or size of the frame member 72. When a plurality of pressing members 73 are provided, it is preferable to arrange the pressing members 73 at equal intervals in the circumferential direction of the frame member 72. The pressing members 73 may be constituted by clamps that sandwich the frame member 72 and the "object constituting the installation surface 2."

[0114] According to the installation structure 70 and fixing device 71 shown in FIG. 8, elastic members 74, 75 are arranged between the frame member 72 and the installation surface 2, and for the same reason as in the above embodiment, wind can be prevented from blowing in between the solar power generation device 3 and the installation surface 2, thereby preventing the solar power generation device 3 from vibrating due to the lift force of the wind.

[0115] Furthermore, by arranging the elastic member 74 between the opposite side curved portion 13a and the installation surface 2, and by arranging the elastic member 75 between the installation surface side curved portion 13b and the frame member 72, even if the force with which the pressing member 51 presses the frame member 50 is increased, the elastic members 74, 75 can prevent damage to the solar power generation device 3.

[0116] 9 includes an installation surface 2, a solar power generation device 3, and a fastener 81 for fastening the solar power generation device 3. The fastener 81 includes a frame member 82, a pressing member 83, and an elastic member 84.

[0117] The frame member 82 has an annular shape and is made of the same material as the frame member 50 shown in the above embodiment. The frame member 82 is provided around the solar power generation device 3, and the entire frame member 82 is disposed on the outer edge portion 13 of the solar power generation device 3.

[0118] The elastic member 84 is formed from the same material as the elastic member 52 shown in the above embodiment, and the fixing device 81 includes one or more elastic members 84 arranged inside the outer edge portion 13 of the solar power generation device 3 along the entire circumference of the solar power generation device 3. Arranging the elastic member 84 along the entire circumference of the solar power generation device 3 can be achieved, for example, by forming a slit around the entire circumference of the solar power generation device 3 and fitting one annular elastic member 84 into the slit, or by sequentially fitting multiple elastic members 75 into the slits. The elastic member 84 may be integrated with the solar power generation device 3 by an adhesive, or may not be integrated with the solar power generation device 3. As the 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. Furthermore, when manufacturing the solar power generation device 3, the elastic member 84 may be embedded inside the outer edge portion 13 of the solar power generation device 3 (for example, the elastic member 84 may be embedded inside the solar power generation device 3 so that the elastic member 84 is surrounded by the sealant 11 (Figure 3 (A))).

[0119] The pressing member 83 is a member that presses the frame member 82 against the installation surface 2. The elastic member 84 is in a compressed state by the pressure applied by the pressing member 83 to the frame member 82. In the illustrated example, the pressing member 83 is configured by a metal or resin bolt or rivet having a small diameter shaft portion 86 extending from a large diameter head portion 85, and the frame member 82 is pressed against the installation surface 2 by inserting the tip side of the shaft portion 86 that penetrates the frame member 82 and the elastic member 84 under the installation surface 2 and pressing the head portion 85 against the frame member 82. Note that the head portion 85 may be pressed against the frame member 82 by inserting the tip side of the shaft portion 86 that penetrates only the frame member 82 under the installation surface 2, but from the viewpoint of suppressing the positional deviation of the elastic member 84, it is preferable that the shaft portion 86 penetrates the frame member 82 and the elastic member 84 as in the illustrated example. The number and installation positions of the pressing members 83 are appropriately set according to the shape and size of the frame member 82. When a plurality of pressing members 83 are provided, it is preferable to arrange the pressing members 83 at equal intervals in the circumferential direction of the frame member 82. The pressing members 51 may be formed of clamps that clamp the frame member 82 and the "object constituting the installation surface 2".

[0120] According to the installation structure 80 and fixing device 81 shown in Figure 9, an elastic member 84 is disposed between the frame member 82 and the installation surface 2, and for the same reason as in the above embodiment, it is possible to prevent wind from blowing in between the solar power generation device 3 and the installation surface 2, thereby preventing the solar power generation device 3 from vibrating due to the lift force of the wind.

[0121] Furthermore, by disposing the elastic member 84 inside the outer edge portion 13 of the solar power generation device 3, the effort required to adjust the position of the elastic member 84 can be reduced.

[0122] In the above-mentioned example, the installation structure 1, 60, 70, 80 and the fixing device 4, 61, 71, 81 are provided with the annular frame member 50, 72, 82, but the installation structure 1, 60, 70, 80 and the fixing device 4, 61, 71, 81 may be provided with a frame member constituted by a plurality of frames arranged in the circumferential direction of the solar power generation device 3 (FIG. 10 shows an example in which the frame member 50 provided in the installation structure 1 is constituted by a plurality of frames 10a arranged in the circumferential direction of the solar power generation device 3). In the above-mentioned case, the installation structure 1, 60, 70, 80 and the fixing device 4, 61, 71, 81 are arranged such that a part or the whole of each frame is arranged on the outer edge of the solar power generation device 3, and a pressing member is provided for each frame, and each pressing member presses the corresponding frame against the installation surface 2.

[0123] In the above-mentioned installation structures 1, 60, 70, 80 and fixing devices 4, 61, 71, 81, the compression ratio of the elastic members 52, 62, 74, 75, 84 is preferably 1% or more, more preferably 3% or more, even more preferably 5% or more, and even more preferably 10% or more, from the viewpoint of suppressing wind blowing in. In addition, from the viewpoint of suppressing deterioration of the elastic members due to expansion of the compression permanent set of the elastic members caused by excessive compression, the compression ratio of the elastic members 52, 62, 74, 75, 84 is preferably 50% or less, more preferably 40% or less, even 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 members by the "total thickness obtained by adding up the thickness of the photovoltaic power generation device before compression and the thickness of the elastic members before compression."

[0124] The thickness of the elastic members 52, 62, 74, 75, 84 before compression is preferably 1 mm or more, more preferably 2.5 mm or more, even more preferably 5 mm or more, even more preferably 10 mm or more, even more preferably 15 mm or more, even more preferably 20 mm or more. The thickness of the elastic members 52, 62, 74, 75, 84 before compression is preferably 100 mm or less, more preferably 50 mm or less, even more preferably 40 mm or less, even more preferably 30 mm or less. When the thickness of the elastic members 52, 62, 74, 75, 84 before compression is set as described above, the compression width (compression displacement) of the elastic members 52, 62, 74, 75, 84 is preferably 0.1 mm or more, more preferably 1 mm or more, even more preferably 5 mm or more, even more preferably 10 mm or more, even more preferably 20 mm or more, from the viewpoint of suppressing wind blowing in. In addition, from the viewpoint of ensuring space (height) in the solar power generation device 3 for placing the power generation unit 10, the compression width (compression displacement) of the elastic members 52, 62, 74, 75, 84 is preferably 100 mm or less, more preferably 75 mm or less, even more preferably 50 mm or less, even more preferably 40 mm, and even more preferably 30 mm or less.

[0125] In order to improve ease of handling during application, the longitudinal elastic modulus of the elastic members 52, 62, 74, 75, 84 is preferably 0.1 MPa or more, more preferably 10 MPa or more, and even more preferably 100 MPa or more.

[0126] From the viewpoint of suppressing wind blowing in, the modulus of longitudinal elasticity of the elastic members 52, 62, 74, 75, 84 is set to 4000 MPa or less, more preferably 2000 MPa or less, even more preferably 1000 MPa or less, and even more preferably 500 MPa or less. From the same viewpoint, it is preferable to set the modulus of longitudinal elasticity of the elastic members 52, 62, 74, 75, 84 lower than the modulus of longitudinal elasticity of the frame member, and for example, the modulus of longitudinal elasticity of the elastic members 52, 62, 74, 75, 84 is preferably set to 50% or less, more preferably 40% or less, even more preferably 30% or less, even more preferably 25%, even more preferably 10% or less, and even more preferably 5% or less of the modulus of longitudinal elasticity of the frame member. [Explanation of symbols]

[0127] 1,60,70,80 Installation structure 2 Installation surface 3. Solar power generation equipment 4,61,71,81 Fixtures 13 Outer edge of solar power generation device 13a Opposite curved part 13b Installation surface side curved section 50,72,82 Frame members 51, 73, 83 Retaining member 52, 62, 74, 75, 84 Elastic member 53 One side of width of frame member 54 Other side of frame member

Claims

1. A fixture for fixing a solar power generation device to an installation surface, a frame member provided around the solar power generation device and disposed on an outer edge of the solar power generation device; A pressing member that presses the frame member against the installation surface; A fixing device comprising one or more elastic members arranged along the entire circumference of the solar power generation device between the frame member and the installation surface.

2. the frame member has a shape in which one widthwise side portion is bent relative to the other widthwise side portion, the one widthwise side portion is disposed on an outer edge portion of the solar power generation device, and the other widthwise side portion is disposed outside the solar power generation device, The fixture according to claim 1 , further comprising one or more first elastic members arranged along an entire periphery of the solar power generation device between the other widthwise side portion and the installation surface.

3. The fixture according to claim 2 , wherein the first elastic member is provided integrally with the frame member.

4. The fixture according to claim 2 , further comprising one or more second elastic members arranged along the entire circumference of the solar power generation device between the one widthwise side portion and an outer edge portion of the solar power generation device.

5. The fixture according to claim 4 , wherein the second elastic member is provided integrally with the frame member or the solar power generation device.

6. The installation surface, A solar power generation device provided on the installation surface; a fixing device for fixing the solar power generation device, The fixing device is a frame member provided around the solar power generation device and disposed on an outer edge of the solar power generation device; A pressing member that presses the frame member against the installation surface; An installation structure for a solar power generation device comprising: one or more elastic members arranged along an entire periphery of the solar power generation device between the frame member and the installation surface.

7. The installation structure for a photovoltaic power generation device according to claim 6, wherein a bending strength of the photovoltaic power generation device is 10 MPa or more and 200 MPa or less.

8. The installation structure for a photovoltaic power generation device according to claim 6, wherein a flexural modulus of the photovoltaic power generation device is 500 MPa or more and 10,000 MPa or less.

9. 7. The installation structure for a photovoltaic power generation device according to claim 6, wherein a bending radius of the photovoltaic power generation device is 10 cm or less.

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