Photovoltaic power generation device and suspension structure of the same

Abstract

To provide a suspension structure of a photovoltaic power generation device capable of suspending the photovoltaic power generation device without reducing an amount of light radiated to the photovoltaic power generation device by a member other than the photovoltaic power generation device by suspending the photovoltaic power generation device by suspension means without using any member other than the photovoltaic power generation device.SOLUTION: A suspension structure 1 includes a photovoltaic power generation device 2 and suspension means 61. The photovoltaic power generation device 2 includes a main body unit 4 and an extension unit 5. In the main body unit 4, a power generation unit 10 is arranged between a barrier sheet 7 and a back sheet 9. The extension unit 5 is constituted by part of the back sheet 9 extending to an outside of the main body unit 4. The extension unit 5 is attached to the suspension means 61, whereby the photovoltaic power generation device 2 is suspended by the suspension means 61.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a solar power generation device and a suspension structure for a solar power generation device. [Background technology]

[0002] Conventionally, a solar power generation device has been used in which a power generation unit is disposed between two sheets constituting a front surface and a back surface. Patent Document 1 discloses that this type of solar power generation device is housed in a bag-shaped net material, and the net material is hung from a hook as a hanging means, so that the solar power generation device is supported by the hook. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-23308 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, the bag-shaped net material that houses the solar power generation device blocks light, reducing the amount of light irradiated onto the solar power generation device, thereby reducing the amount of power generated by the solar power generation device.

[0005] The present invention has been made in consideration of the above-mentioned matters, and its purpose is to provide a solar power generation device that can be suspended from a suspension means without using any components other than the solar power generation device, thereby enabling the solar power generation device to be suspended without the amount of light irradiated to the solar power generation device being reduced by components other than the solar power generation device, and a suspension structure for the solar power generation device. [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. Solar power generation device, a suspension means for suspending the solar power generation device from a construction material, The solar power generation device includes a main body and an extension. the main body portion has a power generating unit disposed between a barrier sheet and a back sheet, the extension portion is constituted by a part of the barrier sheet or a part of the back sheet extending outwardly of the main body portion, The suspension structure for a solar power generation device, wherein the extension portion is attached to the suspension means.

[0008] Item 2. The hanging means includes a rod-shaped fixing member that is fixed to the construction material, and a supported member that is supported by the fixing member by passing the fixing member through a through hole; 2. The suspension structure for a solar power generation device according to item 1, wherein a tip side of the extension portion is attached to the supported member.

[0009] Item 3. The hanging means includes a hollow fixing member that is fixed to the construction material, and a supported member that is inserted into the fixing member and supported by the fixing member; The tip side of the extension portion is wrapped around the supported member, The fixing member has a slit formed therein downwardly through which the extension portion passes, 2. The suspension structure for a solar power generation device according to item 1, wherein at least a portion of a tip side of the extension portion is sandwiched between the supported member and the fixing member.

[0010] Item 4. The suspension means is provided with a movement restriction means, 4. The suspension structure for a photovoltaic power generation device according to item 3, wherein the movement restricting means restricts the movement of the extension in a direction in which the extension is released from being wrapped around the supported member.

[0011] Item 5. The hanging means includes a hollow fixing member fixed to the construction material, and a supported member inserted into the fixing member and supported by the fixing member; A tip side of the extension portion is attached to the supported member, Item 2. The suspension structure for a solar power generation device according to item 1, wherein the fixing member has a slit formed downward from the inside thereof through which the extension portion passes.

[0012] Item 6. The suspension structure for a solar power generation device according to item 2 or 5, wherein a tip side of the extension portion is attached to the supported member by being clamped between the supported member.

[0013] Item 7. The suspension structure for a solar power generation device according to item 2 or 5, wherein a tip side of the extension portion is attached to the supported member by being bonded to the supported member.

[0014] Item 8. The hanging means includes a rod-shaped fixing member that is fixed to the construction material; The extension portion is provided with an annular hard member, 2. The suspension structure for a photovoltaic power generation device according to item 1, wherein the extension is attached to the fixing member by passing the fixing member through a through hole of the hard member.

[0015] Item 9. A main body having a power generating unit disposed between a barrier sheet and a back sheet; An extension portion extending outward from the main body portion, the extension portion is formed by a part of the barrier sheet or a part of the back sheet, The solar power generation device wherein the extension portion is attached to a hanging means for hanging the solar power generation device on a construction material.

[0016] Item 10. The hanging means includes a rod-shaped fixing member fixed to the construction material, and a supported member supported by the fixing member by passing the fixing member through a through hole; 10. The photovoltaic power generation device according to item 9, wherein a tip side of the extension portion is attached to the supported member.

[0017] Item 11. The hanging means includes a rod-shaped fixing member fixed to the construction material, The extension portion is provided with an annular hard member, 10. The photovoltaic power generation device according to item 9, wherein the extending portion is attached to the fixing member by passing the fixing member through a through hole of the hard member. Effect of the Invention

[0018] According to the present invention, the solar power generation device can be suspended from the suspension means without using any components other than the solar power generation device, so that the solar power generation device can be suspended without the amount of light irradiated to the solar power generation device being reduced by components other than the solar power generation device. [Brief description of the drawings]

[0019] [Figure 1] 1A is a front view showing a suspension structure for a solar power generation device according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the suspension structure according to the first embodiment cut along line AA in FIG. [Diagram 2] 1A is a cross-sectional view showing the solar power generation device 2 cut along line BB in FIG. 1A. FIG. 1B is an enlarged view of part a in FIG. 1A. FIG. 1C is a cross-sectional view showing the power generation unit cut along line CC in FIG. 1A. [Diagram 3] 4 is an enlarged cross-sectional view showing a state in which the extension is attached to the hanging means. FIG. [Figure 4] 1A is a front view showing a modified example of the suspension structure for a solar power generation device according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the modified example of the suspension structure for the first embodiment cut along line DD in FIG. [Diagram 5] 4 is an enlarged cross-sectional view showing a state in which the extension is attached to the hanging means. FIG. [Figure 6] 1A is a front view showing a suspension structure for a solar power generation device according to a second embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the suspension structure according to the second embodiment cut along line EE of FIG. [Figure 7]1A is a front view showing a modified example of the suspension structure for a solar power generation device according to a second embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the modified example of the suspension structure for the second embodiment cut along line FF in FIG. [Figure 8] 1A is a front view showing a modified example of the suspension structure for a solar power generation device according to a second embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the modified example of the suspension structure for the second embodiment cut along line FF in FIG. [Figure 9] 1A is a front view showing a modified example of the suspension structure for a solar power generation device according to a second embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the modified example of the suspension structure for the second embodiment cut along line FF in FIG. [Figure 10] 1A is a front view showing a suspension structure for a solar power generation device according to a third embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the suspension structure according to the third embodiment cut along line GG in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1(A) is a front view showing a suspension structure 1 according to a first embodiment of the present invention. Fig. 1(B) is a cross-sectional view showing the suspension structure 1 cut along line AA in Fig. 1(A).

[0021] The suspension structure 1 according to the first embodiment includes a solar power generation device 2 and a suspension means 3 for suspending the solar power generation device 2 from a construction material 100. The solar power generation device 2 includes a main body 4 and an extension portion 5 extending outward from the main body 4. In the suspension structure 1, the extension portion 5 is attached to the suspension means 3 at a plurality of positions in the width direction (left-right direction in FIG. 1(A)) so that the solar power generation device 2 is suspended from the suspension means 3. Examples of the construction material 100 include wall materials (metal siding materials, ceramic siding materials, sandwich panels, etc.), roofing materials, partitions, door materials, fence materials, flooring materials, etc. Examples of the roofing materials include roofing materials used for folded plate roofs, slate roofs, roof decks, tile bar roofing, vertical flat roofing, etc. The roof may be vertically roofed or horizontally roofed.

[0022] (Solar power generation device 2) Fig. 2(A) is a cross-sectional view showing the state where the main body 4 of the solar power generation device 2 is cut along the line BB in Fig. 1. Fig. 2(B) is an enlarged view of part a in Fig. 2(A). Fig. 2(C) is a cross-sectional view showing the state where the power generation unit is cut along the line CC in Fig. 2(A).

[0023] The main body 4 of the solar power generation device 2 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 main body 4 to seal between the barrier sheet 7 and the back sheet 9. The main body 4 generates electricity in the power generation section 10 as light irradiated to the front surface 6 is incident on the power generation section 10.

[0024] The extension portion 5 of the solar power generation device 2 is formed of a part of the barrier sheet 7 or a part of the back sheet 9 extending outward from the main body 4. In the following, a case where the extension portion 5 is formed of a part of the back sheet 9 will be described as an example, but even when the extension portion 5 is formed of a part of the barrier sheet 7, the extension portion 5 has the same characteristics as those described below.

[0025] The main body 4 and the extension 5 each have a sheet shape. In this specification, "sheet-like" 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-like" also includes membrane-like, foil-like, film-like, etc.

[0026] The main body 4 and the extension 5 are formed in a generally rectangular shape when viewed from the front. However, the present invention does not particularly limit the shapes of the main body 4 and the extension 5, and the main body 4 may be, for example, generally circular, elliptical, or polygonal when viewed from the top. The extension 5 may be any shape that extends outward from the main body 4. It is preferable that the extension 5 extends from the entire width of the main body 4, but when the main body 4 is light, the width of the extension 5 may be 90% or more, 70% or more, or 60% or more of the width of the main body 4.

[0027] The main body 4 and the extension 5 have flexibility (the property that an object can bend). In the present invention, the fact that the main body 4 and the extension 5 have flexibility means that the main body 4 and the extension 5 have a bending strength of 10 MPa or more, or that the main body 4 and the extension 5 have a bending modulus of 100 MPa or more. The bending strength of the main body 4 and the extension 5 is more preferably 20 MPa or more, more preferably 50 MPa or more. The bending strength of the main body 4 and the extension 5 is preferably 200 MPa or less, more preferably 150 MPa or less, more preferably 50 MPa or less. The bending modulus of the main body 4 and the extension 5 is more preferably 500 MPa or more. The bending modulus of the main body 4 and the extension 5 is preferably 10,000 MPa or less, more preferably 5,000 MPa or less. When the flexibility of the main body 4 and the extension 5 is evaluated by bending strength, the bending modulus does not have to be included in the above range. When the flexibility of the main body 4 and the extension 5 is evaluated by the bending modulus, the bending strength does not have to be within the above range. The bending strength and bending modulus of the main body 4 and the extension 5 are measured in accordance with JIS K 7171.

[0028] (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.

[0029] 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.

[0030] 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.

[0031] (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 2 (for example, in the longitudinal direction or width direction of the solar power generation device 2). Note that the power generation section 10 may be configured with a single power generation cell 20.

[0032] (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.

[0033] (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."

[0034] 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.

[0035] 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.

[0036] 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 2, 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.

[0037] (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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] (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. 2(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.

[0042] (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.

[0043] 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.

[0044] (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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] (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.

[0052] 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.

[0053] 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.

[0054] (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 the 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 can be further improved (i.e., the 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.

[0055] (Barrier Sheet 7) The barrier sheet 7 has light-transmitting properties and constitutes the surface 6 of the main body 4 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.

[0056] 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.

[0057] 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 2 can be easily set to 50 MPa or more and 150 MPa or less.

[0058] (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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 2 is installed in a bent state, the shear stress generated in the solar power generation device 2 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.

[0064] 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 ensure the escape of 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 2, thereby improving the workability and ease of installation.

[0065] The sealant 11 is not necessarily required and may not be provided. When the sealant 11 is not provided, the main body 4 may be configured such that, for example, only the power generation unit 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 unit 10.

[0066] (Sealing edge material 12) In the area of ​​the outer peripheral edge of the main body portion 4 where the extension portion 5 (part of the back sheet 9) does not extend, as shown in Figure 2 (A), 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 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 adhered to the "surface of the back sheet 9 constituting the back surface 8" are sequentially connected.

[0067] In the area of ​​the outer peripheral edge of the main body portion 4 from which the extension portion 5 (part of the back sheet 9) extends, the sealing edge material 12 has a structure in which the above-mentioned first adhesive portion 40 and the sealing portion 41 are sequentially connected, and one end of the sealing portion 41 is adhered to the "surface 33 of the back sheet 9 facing the main body portion 4 (Figure 1 (B))".

[0068] When the extension portion 5 is formed from a part of the barrier sheet 7 (not shown), in the range of the outer periphery of the main body 4 where the extension portion 5 (part of the barrier sheet 7) does not extend, the sealing edge material 12 has a structure in which the above-mentioned first adhesive portion 40, sealing portion 41, and second adhesive portion 42 are sequentially connected. In the range of the outer periphery of the main body 4 where the extension portion 5 (part of the barrier sheet 7) extends, the sealing edge material 12 has a structure in which the above-mentioned sealing portion 41 and second adhesive portion 42 are sequentially connected, and one end of the sealing portion 41 is adhered to "the surface of the barrier sheet 7 facing the main body 4".

[0069] Examples of the material for the sealing edge material 12 include tape materials made of butyl rubber, silicone rubber, and the like.

[0070] Moreover, the sealing edge material 12 is not necessarily required. When the extension portion 5 is formed by a part of the back sheet 9 as in this embodiment, the edge of the barrier sheet 7 may be folded towards the back sheet 9 and the folded tip may be joined to the back sheet 9. When the extension portion 5 is formed by a part of the barrier sheet 7, the edge of the back sheet 9 may be folded towards 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.

[0071] (Function of main body 4 of solar power generation device 2) According to the above-described main body 4, when light irradiated onto 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, 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).

[0072] 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. 2(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 2 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. 2(C)). The current is taken out via a power distribution line (not shown).

[0073] 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.

[0074] 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 70 is joined to the electrode 24 of the other cell 70. In this manner, the same effect as above can be obtained.

[0075] Furthermore, when the power generation unit 10 is provided with a translucent base material 21, from the viewpoint of facilitating the manufacture of the power generation unit 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. 2(C).

[0076] 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.

[0077] The solar power generation device 2 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 2 and are electrically connected in series or in parallel.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] (Hanging means 3) 3 is an enlarged cross-sectional view showing the state in which the extension portion 5 is attached to the hanging means 3. The hanging means 3 included in the hanging structure 1 includes a plurality of sets each including a fixing member 50 fixed to the construction material 100 and a supported member 51 supported by the fixing member 50.

[0082] Each fixing member 50 has a rod shape and extends horizontally from the construction material 100. Each supported member 51 has a through hole 52, and is supported by the fixing member 50 by passing the fixing member 50 through the through hole 52. The direction in which the fixing member 50 extends is not limited to the horizontal direction, and the fixing member 50 may extend upward or downward from the construction material 100. When the fixing member 50 extends downward, for example, the tip side of the fixing member 50 is curved upward to support the supported member 51. In addition, the present invention does not particularly limit the cross-sectional shape of the fixing member 50, and the cross-sectional shape of the fixing member 50 may be various shapes such as a circle or a polygon. In addition, while the illustrated example shows an example in which each supported member 51 is supported by one fixing member 50, it is also possible to form multiple through holes 52 in each supported member 51 and pass the fixing members 50 through each through hole 52, so that each supported member 51 is supported by multiple fixing members 50.

[0083] Each supported member 51 has a slit 53 that opens downward when supported by the fixing member 50. A plurality of positions in the width direction (left and right direction in FIG. 3(A)) of the extension portion 5 are inserted into the slits 53 of the supported member 51 and sandwiched by the supported member 51, so that the plurality of positions in the width direction of the extension portion 5 are attached to the supported member 51.

[0084] The fixing member 50 and the supported member 51 are each formed from a resin or a metal. Examples of resins for forming the fixing member 50 include hard plastics such as polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), and polycarbonate (PC), and rubbers such as nitrile rubber (NBR) can be used. Examples of metals for forming the fixing member 50 include stainless steel and aluminum. Similar resins and metals can be used for forming the supported member 51.

[0085] In addition, when the supported member 51 is formed from resin, the extension portion 5 is inserted into the slit 53 while the supported member 51 is heated, and then the supported member 51 is cooled to solidify and shrink, thereby achieving a state in which the extension portion 5 is sandwiched between the supported member 51.

[0086] Furthermore, when the supported member 51 is made of resin, it is preferable to provide a retaining means for preventing the extension portion 5 from coming out of the slit 53 while allowing the extension portion 5 to be inserted into the slit 53 in the supported member 51. The retaining means is, for example, a means having a tapered surface that inclines toward the center of the slit 53 as it approaches the back side of the slit 53.

[0087] Furthermore, when the supported member 51 is formed from metal, for example, by inserting the extension portion 5 into the slit 53 and compressing the supported member 51 so that the width of the slit 53 narrows, the extension portion 5 can be sandwiched between the supported member 51.

[0088] 4, the hanging means 3 may include one supported member 51 and one or more fixing members 50 that support the supported member 51, and the extension portion 5 may be attached to the one supported member 51. In this case, the width of the supported member 51 is, for example, 60% or more of the width of the extension portion 5, preferably 70% or more, and more preferably 90% or more.

[0089] 5, instead of sandwiching the extension portion 5 between the supported member 51, the extension portion 5 may be attached to the supported member 51 by adhering the extension portion 5 to the supported member 51 with an adhesive 54. For example, a vinyl acetate-based, nitrile rubber-based, cyanoacrylate-based, silicone rubber-based, epoxy resin-based, acrylic resin-based, or styrene butadiene rubber-based adhesive can be used as the adhesive 54. The extension portion 5 may also be attached to the supported member 51 by fusing the extension portion 5 to the supported member 51.

[0090] (Action and effect) According to this embodiment, by attaching the extension portion 5 of the solar power generation device 2 to the hanging means 3, the solar power generation device 2 can be suspended from the hanging means 3 without using any member other than the solar power generation device 2 (such as a bag for housing the solar power generation device 2). Therefore, the solar power generation device 2 can be suspended without reducing the amount of light irradiated to the solar power generation device 2 by members other than the solar power generation device 2, and the number of parts required for attachment to the hanging means 3 can be reduced.

[0091] Furthermore, according to the suspension structure 1 of this embodiment, by attaching the extension portion 5, which is part of the solar power generation device 2, to the suspension means 3, there is no need to perform any prior work on the solar power generation device 2, such as placing the solar power generation device 2 in a bag, thereby improving ease of installation.

[0092] Another embodiment of the present invention will be described below. In the following description, differences from the first embodiment will be described, and the same reference numerals will be used to denote the same parts as the first embodiment, and description thereof will be omitted.

[0093] Second Embodiment Fig. 6(A) is a front view showing a suspension structure 60 for a solar power generation device 2 according to a second embodiment of the present invention. Fig. 6(B) is a cross-sectional view showing a state in which the suspension structure 60 according to the second embodiment is cut along line EE in Fig. 6(A).

[0094] The suspension structure 60 according to the second embodiment includes a solar power generation device 2 and a suspension means 61 for suspending the solar power generation device 2 from a construction material 100, and an extension portion 5 is attached to the suspension means 61.

[0095] The hanging means 61 includes a fixing member 62 and a supported member 63. The fixing member 62 is hollow, and is fixed to the construction material 100. The supported member 63 is inserted into the fixing member 62, and is supported by the fixing member 62.

[0096] In the suspension structure 60 according to the second embodiment, a slit is formed in the fixed member 62 for passing the extension portion 5 downward from inside the fixed member 62, and the extension portion 5 is attached to the suspension means 61 by passing the extension portion 5 through the slit 64 and by sandwiching the tip side 5a of the extension portion 5 wrapped around the supported member 63 between the supported member 63 and the fixed member 62. Attaching the extension portion 5 to the suspension means 61 in this manner is achieved, for example, by inserting the supported member 63 with the extension portion 5 wrapped around it into the inside of the fixed member 62 from an opening at an end of the fixed member 62 in the width direction (the left-right direction in FIG. 6(A)).

[0097] The fixing member 62 and the supported member 63 are each made of a resin or a metal. Examples of resins that can be used to form the fixing member 62 include hard plastics such as polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), polycarbonate (PC), and polyether ether ketone (PEEK). Rubbers such as nitrile rubber (NBR) and fluororesins such as ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), and polytetrafluoroethylene (PTFE) can also be used. Examples of metals that can be used to form the fixing member 62 include stainless steel and aluminum. Similar resins and metals can be used to form the supported member 63.

[0098] The fixing member 62 has a curved shape having the following features 1 and 2, and forms a slit 64 between a tip 62b of the fixing member 62 and the construction material 100.

[0099] Feature 1: The fixing member 62 has a base end 62a that is fixed to the construction material 100 and a tip end 62b that is located below the base end 62a, and the tip end 62b is spaced apart from the construction material 100. Feature 2: Between the base end 62a and the tip end 62b, the fixing member 62 first extends away from the construction material 100 and then extends toward the construction material 100 (in the illustrated example, a base end range 65 described below corresponds to the range extending away from the construction material 100, and a tip end range 67 described below corresponds to the range extending toward the construction material 100).

[0100] The fixing member 62 having the above features 1 and 2, when the supported member 63 is placed inside it, has a base end range 65 located above the supported member 63, an intermediate range 66 located on the opposite side of the construction material 100 from the supported member 63, and a tip end range 67 located below the supported member 63, and supports the supported member 63 by the tip end range 67.

[0101] In the illustrated example, the fixing member 62 has the above-mentioned ranges 65, 66, and 67 by having a "bent shape with two corners" having the above-mentioned features 1 and 2, but the present invention does not limit the shape of the fixing member 62 to the shape of the illustrated example. For example, the fixing member 62 may have a base end side range located on the upper side of the supported member 63, a middle range located on the opposite side of the construction material 100 from the supported member 63, and a tip end side range located on the lower side of the supported member 63 and supporting the supported member 63 by having a "bent shape with three or more corners" or a "curved shape" having the above-mentioned features 1 and 2. The width of the supported member 63 is, for example, 60% or more, preferably 70% or more, and more preferably 90% or more of the width of the extension portion 5. The width of the fixing member 62 is, for example, 60% or more, preferably 70% or more, and more preferably 90% or more of the width of the supported member 63 or the extension portion 5.

[0102] The tip side 5a of the extension portion 5 wrapped around the supported member 63 is sandwiched between the construction material 100 and the supported member 63, between the base end side area 65 and the supported member 63, between the intermediate area 66 and the supported member 63, and between the tip side area 67 and the supported member 63. By this sandwiching, the extension portion 5 is attached to the hanging means 61. In the illustrated example, the tip side 5a of the extension portion 5 is wrapped around the supported member 63 counterclockwise (the tip side 5a of the extension portion 5 is wrapped around the supported member 63 in the order of: construction material 100 side of the supported member 63 → upper side of the supported member 63 → middle range 66 side of the supported member 63 (opposite side of the construction material 100) → lower side of the supported member 63), but the tip side 5a of the extension portion 5 may also be wrapped around the supported member 63 clockwise (i.e., the tip side 5a of the extension portion 5 may be wrapped around the supported member 63 in the order of: lower side of the supported member 63 → middle range 66 side of the supported member 63 (opposite side of the construction material 100) → upper side of the supported member 63 → construction material 100 side of the supported member 63).

[0103] According to this embodiment, the tip side 5a of the extension part 5 wrapped around the supported member 63 is sandwiched between the supported member 63 and the fixing member 62, so that the tip side 5a of the extension part 5 can be stably fixed. Therefore, the suspended state of the solar power generation device 2 can be stably maintained.

[0104] Furthermore, according to this embodiment, the weight of the supported member 63 is added to the portion 5a-1 (FIG. 6(B)) of the tip side 5a of the extension portion 5 that is sandwiched between the tip side range 67 and the supported member 63, so that the portion 5a-1 of the extension portion 5 can be firmly fixed by being sandwiched between the tip side range 67 and the supported member 63. This makes it possible to maintain the suspended state of the solar power generation device 2 more stably.

[0105] In addition, in this embodiment, the length of the extension portion 5 wrapped around the supported member 63 can be adjusted as desired as long as the solar power generation device 2 can be suspended, and by adjusting the length of the extension portion 5 wrapped around the supported member 63, the height of the main body 4 of the solar power generation device 2 can be adjusted.

[0106] In this embodiment, the shapes of the fixing member 62 and the supported member 63 constituting the hanging means 61 are not limited to the shapes in the illustrated example. The shapes of the fixing member 62 and the supported member 63 can be various shapes that allow the extension portion 5 to be attached to the hanging means 61 by passing the extension portion 5 downward from inside the fixing member 62 through the slit 53 of the fixing member 62 and by clamping a part of the tip side 5a of the extension portion 5 between the fixing member 62 and the supported member 63. For example, the hanging means 61 may be one that allows the extension portion 5 to be attached by clamping a part of the tip side of the extension portion located between the supported member and the range of the fixing member. In this case, a gap may be generated between the building 100 and the supported member 63 and the extension portion, and a gap may be generated between the fixed member 100 or the supported member 63 and the extension portion between the range or range of the supported member 63 and the fixing member 62.

[0107] In order to stably maintain the wrapping of the extension portion 2 around the supported member 63, it is preferable to provide the hanging means 61 with a movement restriction means for restricting the movement of the extension portion 5 in the direction X (FIG. 7) in which the wrapping of the extension portion 5 around the supported member 63 is released. The movement restriction means is, for example, as shown in FIG. 7, configured by a protruding member 68 protruding from the inner surface 62a of the fixed member 62. In this case, the protruding member 68 (movement restriction means) restricts the movement of the extension portion 5 in the direction X by making the surface 68a on the downstream side in the direction Y in which the extension portion 5 is wrapped perpendicular to the inner surface 62a of the fixed member 62, or by making the angle between the surface 68a and the inner surface 62a an acute angle (an angle less than 90°). In the illustrated example, the protruding members 68 (movement restriction means) are provided in all of the ranges 65, 66, and 67 of the fixed member 62, but the protruding members 68 may be provided in any one or two of the ranges 65, 66, and 67. From the viewpoint of strongly restricting the movement of the extension portion 5, it is preferable to provide the protruding member 68 at least in the "range 67 where the weight of the supported member 63 is loaded". The member constituting the movement restricting means is not limited to the protruding member 68, and may be various members capable of restricting the movement of the extension portion 5 in the direction X (FIG. 7). For example, the movement restricting means may be constituted by a protruding member (not shown) protruding from the outer surface of the supported member 63. In this case, the protruding member (movement restricting means) restricts the movement of the extension portion 5 in the direction X by making the downstream side surface of the protruding member in the direction Y perpendicular to the outer surface of the supported member 63, or by making the angle between the downstream side surface of the direction Y and the outer surface of the supported member 63 an acute angle (an angle less than 90°). The hanging means 61 may be constituted as a movement restricting means by combining the protruding member 68 protruding from the inner surface 62a of the fixed member 62 and the protruding member protruding from the outer surface of the supported member 63.

[0108] In this embodiment, instead of sandwiching the tip side 5a of the extension portion 5 between the supported member 63 and the fixed member 62, the tip side 5a of the extension portion 5 may be attached to the supported member 63 (see Figs. 8 and 9). In this case, for example, the extension portion 5 passes through a slit 64 formed in the fixed member 62, and the supported member 63 to which the tip side 5a of the extension portion 5 is attached is inserted into the fixed member 62, so that the extension portion 5 is attached to the hanging means 61. In the above-mentioned case, for example, as shown in Fig. 8, the tip side 5a of the extension portion 5 is sandwiched between the supported member 63, so that the tip side 5a of the extension portion 5 is attached to the supported member 63 (the tip side 5a of the extension portion 5 is sandwiched between the supported member 63 in the same manner as the method of sandwiching the extension portion 5 between the supported member 51 in the example of Fig. 3). 9, the tip side 5a of the extension portion 5 is attached to the supported member 51 by adhering the tip side 5a of the extension portion 5 to the supported member 51 with an adhesive 55. For example, a vinyl acetate-based, nitrile rubber-based, cyanoacrylate-based, silicone rubber-based, epoxy resin-based, acrylic resin-based, or styrene butadiene rubber-based adhesive can be used as the adhesive 55. Alternatively, the tip side 5a of the extension portion 5 is fused to the supported member 51 by adhering the tip side 5a of the extension portion 5 to the supported member 51 (not shown). When doing as described above, the solar power generation device 2 is prepared in advance with the extension portion 5 attached to the supported member 63, for example, by clamping the tip side 5a of the extension portion 5 with the supported member 63, or by gluing or fusing the tip side 5a of the extension portion 5 to the supported member 51, and then, at the installation location of the solar power generation device 2, the tip side 5a of the extension portion 5 and the supported member 63 are inserted inside the fixing member.

[0109] Also, even when the tip side 5a of the extension portion 5 is attached to the supported member 63 as described above, the shapes of the fixing member 62 and the supported member 63 are not limited to the shapes in the illustrated example. The shapes of the fixing member 62 and the supported member 63 can be various shapes to which the extension portion 5 can be attached by passing the extension portion 5 through a slit 64 formed in the fixing member 62 and inserting the supported member 63 to which the tip side 5a of the extension portion 5 is attached into the fixing member 62. For example, if the supported member 63 and the extension portion 5 can be prevented from falling by friction between the supported member 63 and the middle range 66 or by adhesion of the supported member 63 to the upper range or middle range 66 (i.e., if the extension portion 5 can be attached), the fixing member 62 may not have the lower range 67.

[0110] 6 to 9 show an example in which one supported member 63 is inserted into one fixing member 62 and supported by one fixing member 62, but the suspending means 61 shown in Figs. 6 to 9 can be changed to one in which one supported member 63 is inserted into multiple fixing members 62 and supported by the multiple fixing members 62. In this case, in the example of Figs. 6 and 7, the extension portion 5 passes through slits 64 formed in each fixing member 62, and in each fixing member 62, the tip side 5a of the extension portion 5 wrapped around the supported member 63 is sandwiched between the supported member 63 and the fixing member 62, so that the tip side 5a of the extension portion 5 is attached to the suspending means 61. In addition, in the examples of Figures 8 and 9, and the example in which the tip side 5a of the extension portion 5 is fused to the supported member 63 described above, the extension portion 5 passes through the slits 64 formed in each fixed member 62, and the supported member 63 to which the tip side 5a of the extension portion 5 is attached is inserted inside each fixed member 62, thereby attaching the tip side 5a of the extension portion 5 to the hanging means 61.

[0111] <Third embodiment> Fig. 10(A) is a front view showing a suspension structure 70 for a solar power generation device 2 according to a third embodiment of the present invention. Fig. 10(B) is a cross-sectional view showing a state in which the suspension structure 70 according to the third embodiment is cut along line GG in Fig. 10(A).

[0112] The suspension structure 70 of the third embodiment comprises a solar power generation device 2 and a suspension means 71 for suspending the solar power generation device 2 from a construction material 100, and the extension portion 5 is attached to the suspension means 71 at multiple positions in the width direction (left-right direction in Figure 10 (A)).

[0113] Each of the hanging means 71 includes a plurality of fixing members 72 fixed to the construction material 100. Each of the fixing members 72 is rod-shaped and extends horizontally from the construction material 100. Each of the fixing members 72 is made of resin or metal. Examples of resins for forming the fixing members 72 include hard plastics such as polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), polycarbonate (PC), and polyether ether ketone (PEEK). Other examples of rubbers that can be used include nitrile rubber (NBR), and fluororesins such as ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), and polytetrafluoroethylene (PTFE). Examples of metals for forming the fixing members 72 include stainless steel and aluminum.

[0114] A plurality of annular hard members 73 are provided on the extension portion 5. Through holes are formed at a plurality of positions in the width direction of the extension portion 5, and the hard members 73 are fitted into the through holes, so that the plurality of hard members 73 are arranged in the width direction of the extension portion 5. The hard members 73 are formed from a hard resin or a metal. Examples of hard resins for forming the hard members 73 include hard plastics such as polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), polycarbonate (PC), and polyether ether ketone (PEEK). Examples of rubbers that can be used include nitrile rubber (NBR), and fluororesins such as ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), and polytetrafluoroethylene (PTFE). Examples of metals for forming the hard members 73 include stainless steel and aluminum.

[0115] In the suspension structure 70, the fixing members 72 are passed through the through holes 74 of the hard members 73, and thus the extension portion 5 is attached to the fixing members 72 at a plurality of positions in the width direction. The direction in which the fixing members 72 extend is not limited to the horizontal direction, and the fixing members 72 may extend upward or downward from the construction material 100. When the fixing members 72 extend downward, for example, the extension portion 5 can be attached to the suspension means 71 by bending the tip side of the fixing member 50 upward. The longitudinal elastic modulus of the hard members 73 is 2000 MPa or more, more preferably 3000 MPa or more, and even more preferably 5000 MPa or more. The above elastic modulus is a value measured by the method of JIS K 7161.

[0116] According to this embodiment, the hole through which the fixing member 72 passes is formed by the through hole 74 of the hard member 73, so that the extension portion 5 can be stably maintained in a state where it is attached to the fixing member 72. Therefore, the solar power generation device 2 can be stably maintained in a suspended state.

[0117] The hanging means 71 may include only one fixing member 72 fixed to the construction material 100. In this case, for example, one hard member 73 is provided at the center position in the width direction of the extension portion 5, and the fixing member 72 is passed through a through hole 74 of the hard member 73, thereby attaching the extension portion 5 to the fixing member 72.

[0118] In this embodiment, for example, the solar power generation device 2 is prepared in advance with the hard member 73 provided on the extension portion 5, and then, at the installation location of the solar power generation device 2, the fixing member 72 is passed through the through hole 74 of the hard member 73.

[0119] 1, 3 to 10 show an example in which the extension 5 located on the upper side of the main body 4 is attached to the hanging means 3, 61, 70 when the solar power generation device 2 is suspended, but the extension 5 located on the upper side of the main body 4 and the extension 5 located on the lower side of the main body 4 may be provided on the solar power generation device 2 when the solar power generation device 2 is suspended, and both extensions 5, 5 may be attached to the hanging means 3, 61, 70. Alternatively, the extension 5 located on the upper side of the main body 4 may be attached to the hanging means 3, 61, 70, and the extension 5 located on the lower side of the main body 4 may be fastened to the construction material 100 by a bolt or the like. In this way, the upper and lower sides of the solar power generation device 2 can be fixed, so that the suspended state of the solar power generation device 2 can be maintained more stably. [Explanation of symbols]

[0120] 1,60,70 Suspended structure 2. Solar power generation equipment 3,61,71 Hanging means 4. Main body of the solar power generation device 5. Extension of solar power generation device 5a Tip side of extension 7. Barrier Sheet 9 Backsheet 10 Power Generation Section 50, 62, 72 Fixing member 51,63 Supported member 52 Through hole of supported member 53,64 Slit 62a Base end of fixing member 62b Tip of fixing member 65 Base end range of fixing member 66 Intermediate range of fixing members 67 Tip side range of fixing member 73 Hard Materials 74 Through holes in hard materials 100 Construction Materials

Claims

1. A solar power generation device; a suspension means for suspending the solar power generation device from a construction material, The solar power generation device includes a main body and an extension. the main body portion has a power generating unit disposed between a barrier sheet and a back sheet, the extension portion is constituted by a part of the barrier sheet or a part of the back sheet extending outwardly of the main body portion, The suspension structure for a solar power generation device, wherein the extension portion is attached to the suspension means.

2. The hanging means includes a rod-shaped fixing member that is fixed to the construction material, and a supported member that is supported by the fixing member by passing the fixing member through a through hole, The suspension structure for a solar power generation device according to claim 1 , wherein a tip side of the extension portion is attached to the supported member.

3. The suspension means includes a hollow fixing member that is fixed to the construction material, and a supported member that is inserted into the fixing member and supported by the fixing member, The tip side of the extension portion is wrapped around the supported member, The fixing member has a slit formed therein downwardly through which the extension portion passes, The suspension structure for a solar power generation device according to claim 1 , wherein at least a portion of a tip side of the extension portion is sandwiched between the supported member and the fixing member.

4. The suspension means is provided with a movement restriction means, The suspension structure for a solar power generation device according to claim 3 , wherein the movement restricting means restricts movement of the extension in a direction in which the extension is released from being wrapped around the supported member.

5. The suspension means includes a hollow fixing member that is fixed to the construction material, and a supported member that is inserted into the fixing member and supported by the fixing member, A tip side of the extension portion is attached to the supported member, The solar power generation device suspension structure according to claim 1 , wherein the fixing member has a slit formed therein downward for passing the extension portion therethrough.

6. The suspension means includes a rod-shaped fixing member that is fixed to a construction material, The extension portion is provided with an annular hard member, The suspension structure for a solar power generation device according to claim 1 , wherein the extension is attached to the fixing member by passing the fixing member through a through hole of the hard member.

7. a main body having a power generating unit disposed between a barrier sheet and a back sheet; An extension portion extending outward from the main body portion, the extension portion is formed by a part of the barrier sheet or a part of the back sheet, The solar power generation device wherein the extension portion is attached to a hanging means for hanging the solar power generation device on a construction material.

8. The hanging means includes a rod-shaped fixing member that is fixed to the construction material, and a supported member that is supported by the fixing member by passing the fixing member through a through hole, The solar power generation device according to claim 7 , wherein a tip side of the extension portion is attached to the supported member.

9. The suspension means includes a rod-shaped fixing member fixed to the construction material, The extension portion is provided with an annular hard member, The solar power generation device according to claim 7 , wherein the extension is attached to the fixing member by passing the fixing member through a through hole of the hard member.

Images