Sheet structure and fitting structure of power generation part in sheet structure

Abstract

To suppress that a power generation part on a sheet member is damaged in a state in which a frame supports the sheet member.SOLUTION: A sheet structure 100 includes: a skeleton 7 having a plurality of frames 8; a sheet member 1 supported by a plurality of frames 8; a power generation part 2 which is arranged above the sheet member 1 and generates power from sunlight; a waterproof sheet 3 which is arranged above the sheet member 1 and the power generation part 2 and faces outdoor space; and a sealant 4 which is filled between the sheet member 1 and the waterproof sheet 3. The plurality of frames 8 support the sheet member 1 at positions shifted from the power generation part 2.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a seat structure and a mounting structure for a power generating unit in the seat structure. [Background technology]

[0002] Patent Document 1 discloses one embodiment of a facility such as a vinyl greenhouse. The facility described in Patent Document 1 includes a support member and a membrane material supported by the support member. The membrane material is made of a transparent organic thin-film solar cell and can generate electricity using sunlight. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-114927 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the greenhouse described in Patent Document 1, the membrane material sags between adjacent support members due to its own weight or accumulation of rainwater. Therefore, as shown in Fig. 7, near the contact portion of the membrane material 91 with the support member 94, the tension applied from the support member 94 to both sides may cause the transparent organic thin-film solar cell 92 to bend and break.

[0005] An object of the present invention is to provide a seat structure and a mounting structure for a power generation unit in a seat structure that can prevent damage to the power generation unit on the sheet member when the sheet member is supported by a frame. [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 structure having a plurality of frames; a sheet member supported by the plurality of frames; a power generation unit that is disposed above the sheet member and generates electricity using sunlight; a waterproof sheet disposed above the sheet member and the power generation unit and facing an outdoor space; A sealant filled between the sheet member and the waterproof sheet; Equipped with The plurality of frames support the sheet member at a position offset from the power generation section.

[0008] Item 2. A structure having multiple frames; a sheet member supported by the plurality of frames; a power generation unit that is disposed above the sheet member so as to be in contact with the sheet member and that generates electricity using sunlight; a waterproof sheet disposed above the sheet member and the power generation unit so as to be in contact with the sheet member and the power generation unit and facing an outdoor space; Equipped with The plurality of frames support the sheet member at a position offset from the power generation section.

[0009] Item 3. The sheet structure according to item 1 or 2, wherein the minimum distance between the power generating unit and each of the plurality of frames is 5 mm or more.

[0010] Item 4. A sheet structure described in any one of items 1 to 3, wherein the minimum distance between the power generating section and each of the multiple frames is 10 times or more the thickness of the power generating section.

[0011] Item 5. The sheet structure according to any one of items 1 to 4, wherein a reinforcing material for reinforcing the sheet member is disposed between the frame and the sheet member.

[0012] Item 6. The sheet structure according to item 5, wherein the elastic modulus of the reinforcing material is greater than the elastic modulus of the sheet member.

[0013] Item 7. A seat structure according to any one of items 1 to 6, wherein the seat member is fixed to the frame. Effect of the Invention

[0014] The seat structure and the mounting structure for the power generation unit in the seat structure according to one embodiment of the present invention have the advantage that damage to the power generation unit on the sheet member can be suppressed when the sheet member is supported by the frame. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a seat structure according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of part C in FIG. 1, as viewed from a direction perpendicular to the power generation section. [Diagram 3] Fig. 3(A) is a cross-sectional view taken along line AA in Fig. 1. Fig. 3(B) is an enlarged view of part B in Fig. 3(A). Fig. 3(C) is a cross-sectional view taken along line CC in Fig. 3(B). [Figure 4] FIG. 4 is a cross-sectional view according to the first modification. [Diagram 5] FIG. 5 is a cross-sectional view according to the second modification. [Figure 6] FIG. 6 is a cross-sectional view of a modified example of the embodiment. [Figure 7] FIG. 7 is a cross-sectional view of a reference example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] <Embodiment> The sheet structure 100 according to this embodiment is a structure in which a power generating sheet body 10 is supported by a framework 7 having a plurality of frames 8. The power generating sheet body 10 has one or a plurality of power generating sections 2 capable of generating electricity from sunlight. As shown in FIG. 2 , the plurality of frames 8 support the power generating sheet body 10 at positions offset from the power generating sections 2 (more specifically, at positions offset from the power generating sections 2 when viewed from above).

[0017] Thus, according to the sheet structure 100 of this embodiment, the power generating sheet body 10 is supported by the frame 8, but since the frame 8 and the power generating section 2 do not overlap, even when tension is applied to the power generating sheet body 10 due to its own weight, rainwater, or the like, the power generating section 2 does not receive force directly from the frame 8. This makes it possible to prevent the power generating section 2 from bending, and thus makes it possible to suppress damage to the power generating section 2.

[0018] Each component of the sheet structure 100 according to this embodiment will be described in more detail below.

[0019] (Overall composition) As shown in Fig. 1, the sheet structure 100 includes a frame 7 and a power-generating sheet body 10 having a plurality of power generation sections 2. Examples of the sheet structure 100 include a vinyl greenhouse, a meeting tent, an event tent, a dome tent, a one-pole tent, and a truck tent that is placed on the bed of a truck. In this embodiment, a vinyl greenhouse will be described as an example of the sheet structure 100, as shown in Fig. 1.

[0020] Here, as shown in Figure 1, the highest part of a roof surface is defined as "above water" and the lowest part as "below water." The direction parallel to the line segment connecting above water and below water at the shortest distance is defined as the "water flow direction." The direction perpendicular to the water flow direction and along the roof surface is defined as the "horizontal direction."

[0021] (Structure 7) The skeleton 7 is a structure that supports the sheet member 1. The skeleton 7 includes a plurality of frames 8, as shown in Fig. 1. The skeleton 7 includes a plurality of frames 8, such as gable posts 81, gable beams 82, side beams 83, arch pipes 84, and purlin pipes 85. Examples of materials for each frame 8 include metal, synthetic resin, carbon, wood, fiberglass, and FRP (Fiber Reinforced Plastics). Examples of materials for each frame 8 include hollow pipes, solid shafts, flat bars, square timber, and wires.

[0022] The end pillars 81 are columns that support the end surface 71 of the structure 7. The structure 7 has multiple end pillars 81. Each end pillar 81 extends in the vertical direction. The end beams 82 are beams supported by the multiple end pillars 81. The end pillars 81 extend perpendicular to the lateral direction and along the horizontal plane. Each end surface 71 of the structure 7 is made up of multiple end pillars 81 and one or more end beams 82.

[0023] The side beams 83 are beams supported by a pair of end faces 71. The body 7 has a plurality of side beams 83. The side beams 83 extend in the horizontal direction (the girder direction). The side beams 83 intersect with the plurality of arch pipes 84 and support each of the arch pipes 84. The plurality of side beams 83 are arranged at intervals in the vertical direction.

[0024] The arch pipe 84 is a frame 8 with an arch-shaped upper end. The skeleton 7 has a plurality of arch pipes 84. The plurality of arch pipes 84 are arranged at regular intervals in the lateral direction. The plurality of arch pipes 84 are fixed to the plurality of side beams 83 and the purlin pipe 85.

[0025] The purlin pipe 85 connects the upper ends of the gable faces 71. The purlin pipe 85 supports the upper ends of the multiple arch pipes 84. The purlin pipes 85 extend in parallel in the horizontal direction. The skeleton 7 according to this embodiment includes one purlin pipe 85, but may include multiple purlin pipes 85.

[0026] The intersecting frames 8 are fixed to each other by joints. Note that the intersecting frames 8 are not limited to being connected to each other by joints, and may be fixed to each other by welding, or may be connected to each other by bolts, dedicated fasteners, or the like.

[0027] (Power generating sheet body 10) The power generating sheet body 10 is a sheet having a power generating function, and covers the body 7. As shown in FIG. 3, the power generating sheet body 10 includes a sheet member 1, a plurality of power generating sections 2, a sealant 4, and a waterproof sheet 3. The power generating sheet body 10 is flexible (more specifically, softness). The electricity generated by the power generating sheet body 10 is used, for example, to turn on lights, charge a battery, and supply power to electrical devices such as air conditioners and heaters.

[0028] In this specification, "sheet" and "sheet-like" refer 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. 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. 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, membranes, foils, films, etc. are also included in "sheet-like".

[0029] Here, "cover" in this specification means to cover the object to be covered when viewed from at least one direction. Moreover, "cover" does not mean "cover" in the strict sense, but as long as most of the object to be covered is covered, it falls within the category of "covering" even if a part is exposed. "Most of the object to be covered" here means 80% or more of the projected area of ​​the object to be covered when viewed from one direction. In this embodiment, if the power generating sheet body 10 overlaps 80% or more of the projected area of ​​the body 7 when viewed from above and below, it is considered that "the power generating sheet body 10 covers the body 7."

[0030] The bending strength of the power generating sheet body 10 is not particularly limited, but is preferably 10 MPa or more, more preferably 20 MPa or more, and even more preferably 50 MPa or more. The bending strength of the power generating sheet body 10 is preferably 200 MPa or less, more preferably 150 MPa or less, and even more preferably 50 MPa or less. The power generating sheet body 10 may be defined by a bending modulus, which is preferably 100 MPa or more, and more preferably 500 MPa or more. On the other hand, the bending modulus of the power generating sheet body 10 is preferably 10,000 MPa or less, and more preferably 5,000 MPa or less. When the power generating sheet body 10 is defined by the bending modulus of elasticity, the bending strength does not have to be within the above range. The bending strength and bending modulus of the power generating sheet body 10 are measured in accordance with JIS K 7171. In this way, the flexibility of the power generating sheet body 10 enables it to conform to the shape of the body, while at the same time preventing damage to the power generating section 2 and wiring even if the power generating sheet body 10 is bent due to the weight of rainwater or the like in the portion of the power generating sheet body 10 supported by the frame 8.

[0031] (Sheet member 1) The sheet member 1 is formed in a sheet shape and constitutes the main body of the power generating sheet body 10. The sheet member 1 is supported by a plurality of frames 8 and covers a body 7. In this embodiment, the sheet member 1 is translucent.

[0032] In this specification, "translucent" or "having translucency" means that the light transmittance is 10% or more with respect to the peak wavelength of the light before incidence. The light transmittance of the sheet member 1 may be 10% or more with respect to the peak wavelength of the light before incidence, but is preferably 50% or more, and more preferably 80% or more. In this specification, a light transmittance of 80% or more with respect to the peak wavelength of the light before incidence is defined as "transparent." When the sheet member 1 is used for a tent, it may have a light-shielding property.

[0033] The sheet member 1 has flexibility. The material used for the sheet member 1 preferably has a tensile strength of 0.1 MPa or more, more preferably 1 MPa or more. The tensile strength is preferably 5000 MPa or less, more preferably 4000 MPa or less.

[0034] Examples of the sheet member 1 include synthetic resin, leather, woven fabric, knitted fabric, nonwoven fabric, and pulp, but the sheet member 1 according to the present embodiment is a synthetic resin. Examples of the synthetic resin include plastic film, polyvinyl chloride, polyolefin, polyester, nylon, and the like, or composite materials thereof.

[0035] The thickness of the sheet member 1 is preferably 500 μm or more, and more preferably 1000 μm or more. The thickness of the sheet member 1 is preferably 5000 μm or less, and more preferably 2500 μm or less.

[0036] (Power Generation Section 2) The power generating unit 2 generates electricity from sunlight by utilizing the photovoltaic effect. The power generating unit 2 is disposed on the sheet member 1 via a sealant 4. In other words, the power generating unit 2 is provided on the sheet member 1. In the power generating unit 2 according to this embodiment, a plurality of power generating cells 21 are arranged in one direction of the surface directions of the solar power generating sheet (for example, the direction toward the rear of the paper in FIG. 3(A)), and form one unit.

[0037] In this specification, the power generating cell 21 is a photoelectric conversion element that utilizes the photovoltaic effect, and is the smallest unit of an element capable of generating electricity. The power generating section 2 is a single unit in which a plurality of power generating cells 21 are mechanically joined together and electrically connected. The amount of power generated by the power generating sheet body 10 can be easily changed by increasing or decreasing the number of power generating sections 2. However, in the present invention, the power generating section 2 may be composed of a single power generating cell 21.

[0038] 3(B), each power generating cell 21 includes a light-transmitting substrate 22, a light-transmitting conductive layer 23, a power generating layer 24, and an electrode 25. The light-transmitting substrate 22, the light-transmitting conductive layer 23, the power generating layer 24, and the electrode 25 are layered in this order along a direction from the waterproof sheet 3 toward the sheet member 1. That is, they are disposed so that the light-transmitting substrate 22 faces the waterproof sheet 3, and the electrode 25 faces the sheet member 1.

[0039] (Translucent base material 22) The light-transmitting base material 22 supports the light-transmitting conductive layer 23, the power generation layer 24, and the electrode 25. The light-transmitting base material 22 has light transmissivity. The light transmissivity of the light-transmitting base material 22 may be such that the light transmittance is 10% or more with respect to the peak wavelength of light before incidence, but is preferably 50% or more, and more preferably 80% or more.

[0040] Examples of materials for the light-transmitting substrate 22 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.

[0041] There are no particular limitations on the thickness of the light-transmitting base material 22 as long as it can support the light-transmitting conductive layer 23, the power generation layer 24, and the electrodes 25, and the thickness is, for example, 10 μm or more and 300 μm or less.

[0042] The light-transmitting substrate 22 is a substrate that is required during the manufacturing process of the power generating cell 21. Therefore, it is not necessarily a necessary component of the final product. The light-transmitting substrate 22 may be used, for example, only during the manufacturing process, or may be removed after or during the manufacturing process. When removed, a substrate that does not have light-transmitting properties may be used instead of the light-transmitting substrate 22.

[0043] (Transparent conductive layer 23) The transparent conductive layer 23 is a layer having electrical conductivity and functions as a cathode. The transparent conductive layer 23 has light transmitting properties. The transparent conductive layer 23 is preferably transparent.

[0044] Examples of the transparent conductive layer 23 include transparent materials such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), NESA film, etc. The transparent conductive layer 23 is formed on the surface of the transparent base material 22 by, for example, a sputtering method, an ion plating method, a plating method, a coating method, etc.

[0045] The light-transmitting conductive layer 23 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.

[0046] The thickness of the transparent conductive layer 23 is preferably, for example, 30 nm or more and 300 nm or less. When the transparent conductive layer 23 is 30 nm or more and 300 nm or less, good conductivity can be obtained while maintaining high flexibility.

[0047] (Power Generation Layer 24) The power generation layer 24 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 24 includes a hole transport layer 241, a photoelectric conversion layer 242, and an electron transport layer 243. The hole transport layer 241, the photoelectric conversion layer 242, and the electron transport layer 243 are stacked in this order along the direction from the translucent conductive layer 23 toward the electrode 25.

[0048] (Hole transport layer 241) The hole transport layer 241 extracts holes generated in the photoelectric conversion layer 242 to the light-transmitting conductive layer 23, and prevents electrons generated in the photoelectric conversion layer 242 from moving to the light-transmitting conductive layer 23. For example, a metal oxide can be used as the material of the hole transport layer 241. 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 (V2O5), 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 241.

[0049] The thickness of the hole transport layer 241 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 241 is 1 nm to 1000 nm, the transport of holes can be realized.

[0050] The photoelectric conversion layer 242 (photoactive layer) is a layer that photoelectrically converts absorbed light. There are no particular limitations on the material of the photoelectric conversion layer 242 as long as it can photoelectrically convert absorbed light, and for example, amorphous silicon, perovskite, non-silicon-based materials (semiconductor material CIGS), etc. are used. The photoelectric conversion layer 242 may also have a tandem-type laminated structure that combines these materials. The photoelectric conversion layer 242 using a non-silicon-based material uses the semiconductor material CIGS containing copper (Cu), indium (In), gallium (Ga), and selenium (Se), and the thickness of the photoelectric conversion layer 242 can be easily reduced.

[0051] In the following, a photoelectric conversion layer 242 using perovskite will be described as an example of the photoelectric conversion layer 242. The photoelectric conversion layer 242 containing a perovskite compound has an advantage that the dependency of the power generation 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 generation efficiency can be obtained.

[0052] 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.

[0053] 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.

[0054] The metal of the metal cation constituting the B site is not particularly limited, and examples thereof include Cu, Ni, Mn, Fe, Co, Pd, Ge, Sn, Pb, Eu, etc. The metal cation constituting the B site may be one type or two or more types.

[0055] 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.

[0056] The thickness of the photoelectric conversion layer 242 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 even more preferably 300 nm or more and 1,000 nm or less. When the thickness of the photoelectric conversion layer 242 is 1 nm or more and 100,000 nm or less, the photoelectric conversion efficiency is improved.

[0057] (Electron transport layer 243) The electron transport layer 243 extracts electrons generated in the photoelectric conversion layer 242 to the electrode 25, and prevents holes generated in the photoelectric conversion layer 242 from moving to the electrode 25. The electron transport layer 243 preferably contains, for example, either a halogen compound or a metal oxide.

[0058] 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 243.

[0059] The thickness of the electron transport layer 243 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 electron transport layer 243 is 1 nm to 1000 nm, electron transport can be achieved.

[0060] (electrode 25) The electrode 25 is conductive and functions as an anode. The electrode 25 can extract electrons from the photoelectric conversion layer 242 in response to the photoelectric conversion caused by the photoelectric conversion layer 242. The electrode 25 may be transparent or may be made of a non-transparent material. Examples of materials for the electrode 25 include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, and alloys containing these metals.

[0061] (Function of power generating cell 21) When light is irradiated onto the front surface of the power generating cell 21, the photoelectric conversion layer 242 of the power generating layer 24 absorbs the light and performs photoelectric conversion, generating electrons and holes in the photoelectric conversion layer 242. The electrons are extracted to the electrode 25 (anode) via the electron transport layer 243, and the holes are extracted to the translucent conductive layer 23 (cathode) via the hole transport layer 241, causing a current to flow from the electrode 25 to the translucent conductive layer 23 (i.e., power generation is performed).

[0062] (Joint structure of multiple power generating cells 21, etc.) In the power generation section 2, a plurality of power generation cells 21 are joined in one direction. Here, FIG. 3(C) shows a cross-sectional view taken along line DD in FIG. 2 (however, the sealant 4, the sheet member 1, and the waterproof sheet 3 are omitted). As shown in FIG. 3(C), the electrode 25 (anode) of each power generation cell 21 has an extension 141 extending from a portion laminated on the electron transport layer 243. The extension 141 extends to the translucent conductive layer 23 of the adjacent power generation cell 21, and is mechanically joined and electrically connected to the translucent conductive layer 23 of the adjacent power generation cell 21. By joining the adjacent power generation cells 21 by the extension 141, the translucent conductive layer 23 at one end of the power generation section 2 and the electrode 25 at the other end of the power generation section 2 are electrically connected to each other.

[0063] By providing the power generating section 2 with a plurality of power generating cells 21, even if a malfunction occurs in some of the power generating cells 21, the amount of electricity extracted from the power generating section 2 can be stabilized.

[0064] Although the electrode 25 has the extension 141, the light-transmitting conductive layer 23 (cathode) may have the extension 141 that extends to the adjacent electrode 25.

[0065] Furthermore, when the power generation section 2 is provided with a translucent base material 22, from the viewpoint of facilitating the manufacture of the power generation section 2, it is preferable to support the translucent conductive layer 23, the power generation layer 24 and the electrodes 25 of each power generation cell 21 on a common translucent base material 22, as shown in FIG. 3(C).

[0066] The power generating sheet body 10 may include a plurality of power generating units 2. In this case, the plurality of power generating units 2 are arranged along one surface of the sheet member 1. The plurality of power generating units 2 are electrically connected in series or in parallel. The plurality of power generating units 2 are electrically connected by a power distribution line arranged between the sheet member 1 and the waterproof sheet 3.

[0067] When multiple power generation units 2 are connected in series, the translucent conductive layer 23 at an end of one power generation unit 2 and the electrode 25 at an end of the other power generation unit 2 are connected via a power distribution line in adjacent power generation units 2. When multiple power generation units 2 are connected in parallel, the translucent conductive layers 23 of adjacent power generation units 2 are connected to each other via a power distribution line, and the electrodes 25 of adjacent power generation units 2 are connected to each other via a power distribution line.

[0068] The distance between adjacent power generating sections 2 may be more than 0 mm, and is preferably 2 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. The distance between adjacent power generating sections 2 is preferably 100 mm or less, more preferably 50 mm or more, and even more preferably 20 mm or less.

[0069] (Sealant 4) The sealant 4 is filled between the sheet member 1 and the waterproof sheet 3 with the power generation unit 2 disposed between the sheet member 1 and the waterproof sheet 3. The sealant 4 prevents water from entering the power generation unit 2 from around the power generation unit 2. The sealant 4 is translucent, and is preferably transparent.

[0070] The sealant 4 preferably has a modulus of transverse elasticity of 500 MPa or less, more preferably 250 MPa or less, even more preferably 100 MPa or less, and even more preferably 50 MPa or less. On the other hand, the lower limit of the modulus of transverse elasticity of the sealant 4 is preferably 0.01 MPa or more, more preferably 0.1 MPa or more, even more preferably 1.0 MPa or more, and even more preferably 10 MPa or more. In this way, the sealant 4 deforms in the planar direction in response to thermal expansion and contraction caused by the temperature difference between the sheet member 1 and the waterproof sheet 3. This makes it possible to suppress the sheet member 1 and the waterproof sheet 3 from peeling off from the sealant 4 due to shear stress caused by thermal expansion and contraction.

[0071] In this case, examples of the material for the sealant 4 include ethylene-vinyl acetate (EVA), polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, SBS resin, SIBS resin, epoxy resin, etc. The "transverse elastic modulus" in this specification is a value calculated from the longitudinal elastic modulus and Poisson's ratio obtained by, for example, a tensile test method.

[0072] From another viewpoint, the sealant 4 can also be specified by its viscosity. The viscosity of the sealant 4 is preferably 11000 mPa·S or more, more preferably 26000 mPa·S or more, and even more preferably 40000 mPa·S or more. On the other hand, the upper limit of the viscosity of the sealant 4 is preferably 700000 mPa·S or less, more preferably 450000 mPa·S or less, and even more preferably 110000 mPa·S or less.

[0073] In this case, examples of the material of the sealant 4 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.

[0074] Thus, in the power generating sheet body 10 according to this embodiment, the sealant 4 is easily deformed in a direction along the waterproof sheet 3 and the sheet member 1, so even if partial expansion and contraction along the surface direction occurs to the waterproof sheet 3 and the sheet member 1, the sealant 4 is likely to follow the partial expansion and contraction. As a result, it is possible to suppress shear stress occurring at the interface between the waterproof sheet 3 and the sealant 4, and / or the interface between the sheet member 1 and the sealant 4, so that peeling at the interface of each layer can be suppressed for a long period of time.

[0075] The peel strength of the sheet member 1 to the sealant 4 is preferably 0.1 N / mm or more, more preferably 0.5 N / mm or more, and even more preferably 0.8 N / mm or more. The peel strength of the barrier sheet 17A to the sealant 4 is preferably 0.1 N / mm or more, more preferably 0.5 N / mm or more, and even more preferably 0.8 N / mm or more.

[0076] The "peel strength" referred to here is the measurement result obtained in a 90° peel test conforming to JIS K6854-1. The 90° peel test is performed under the following conditions: peel speed: 300 mm / min, measurement temperature: room temperature (25°C), and atmosphere: atmospheric pressure.

[0077] From the viewpoint of enhancing the effect of preventing peeling, the thickness of the sealant 4 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 4 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 4 10 μm or more, it is possible to ensure a sufficient escape allowance for shear stress during thermal expansion and contraction, and also to reduce the transmission of impact to the power generation section 2 when an external force is applied to the power generation sheet body 10. By making the thickness of the sealant 4 300 μm or less, it is possible to reduce the weight of the power generation sheet body 10, and therefore the number of frames 8 can be reduced, thereby realizing cost savings and construction savings.

[0078] (Tarp 3) The waterproof sheet 3 faces the outdoor space and covers the multiple power generation units 2. The waterproof sheet 3 is disposed on the opposite side of the power generation units 2 from the sheet member 1. The waterproof sheet 3 is waterproof. The waterproof sheet 3 is also translucent. It is preferable that the waterproof sheet 3 is transparent. The waterproof sheet 3 not only prevents water from entering the power generation units 2, but also buffers external forces.

[0079] The waterproof sheet 3 has flexibility. Examples of materials used for the waterproof sheet 3 include plastic films, polyvinyl chloride, polyolefin, polyester, nylon, and composite materials thereof. The thickness of the sheet member 1 is preferably 500 μm or more, and more preferably 1000 μm or more. The thickness of the waterproof sheet 3 is preferably 5000 μm or less, and more preferably 2500 μm or less.

[0080] The waterproof sheet 3 preferably has a tensile strength of 0.1 MPa or more, more preferably 1 MPa or more, and preferably has a tensile strength of 5000 MPa or less, more preferably 4000 MPa or less.

[0081] The waterproof sheet 3 may cover each power generation section 2 one-to-one, but the waterproof sheet 3 in this embodiment is configured to collectively cover multiple power generation sections 2 that are arranged horizontally.

[0082] (Mounting structure) The power generating sheet body 10 configured in this manner is attached to the main body 7 so as to cover it. When the power generating sheet body 10 is attached to the main body 7, each power generating section 2 is disposed in a portion surrounded by the frame 8, as shown in Fig. 1. More specifically, each power generating section 2 is disposed so as to be located within an opening surface (sometimes referred to as "frame opening surface A1") surrounded by the side beams 83, a pair of arch pipes 84, and a purlin pipe 85.

[0083] As shown in Fig. 2, each power generating unit 2 is positioned at a position offset from the frame 8 and is positioned so as not to overlap with the surrounding frame 8 in a plan view. An external force is applied from the frame 8 to the portion of the power generating sheet body 10 that contacts the frame 8, but since there is no power generating unit 2 in that portion, bending of the power generating unit 2 can be prevented and damage to the power generating unit 2 can be suppressed. In this specification, "plan view" means viewing the main surface of the object from a direction perpendicular to the main surface. In the case where the main surface is curved, it means viewing the object along the normal line passing through the center of gravity of the object.

[0084] The minimum distance d between the power generation unit 2 and the frame 8 is preferably 5 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. In order to ensure the area of ​​the power generation unit 2, the upper limit of the minimum distance d is preferably 50 mm or less, and more preferably 40 mm or less. When the minimum distance d is 5 mm or more, the power generation unit 2 is less susceptible to external forces from the frame 8.

[0085] Furthermore, the minimum distance d is preferably 10 times or more, more preferably 50 times or more, and even more preferably 100 times or more, the thickness of the power generation section 2. From the viewpoint of ensuring the area of ​​the power generation section 2, the upper limit of the minimum distance d is preferably 10,000 times or less, more preferably 1,000 times or less, the thickness of the power generation section 2. When the minimum distance d is 10 times or more the thickness of the power generation section 2, the power generation section 2 is less susceptible to the effect of external forces from the frame 8.

[0086] As shown in Fig. 1, the power generating unit 2 is disposed within a plurality of frame opening surfaces A1 constituting one of the sloped surfaces of the roof surface, among a plurality of frame opening surfaces A1 in the structural body 7. For this reason, for example, when rainwater accumulates on the power generating sheet body 10 during rainfall, stress is likely to concentrate on the contact portion of the power generating sheet body 10 with the frame 8, but damage to the power generating unit 2 can be suppressed. Thus, in this embodiment, the power generating unit 2 is disposed within all of the frame opening surfaces A1 on one of the sloped surfaces of the roof surface, but it may be disposed within some of the frame opening surfaces A1. This makes it possible to generate electricity while ensuring the amount of sunlight entering the sheet structure 100.

[0087] The power generating unit 2 may be disposed within the frame opening surface A1 surrounded by a pair of side beams 83 and a pair of arch pipes 84, or the power generating unit 2 may be disposed within the frame opening surface A1 surrounded by the end beams 82, the end pillars 81, and the arch pipes 84. For example, when the power generating sheet body 10 is pressed against the frame 8 by a strong wind, damage to the power generating unit 2 can be suppressed.

[0088] <Modification> The above embodiment is merely one of various embodiments of the present invention. The embodiment can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Modifications of the embodiment are listed below. The modifications described below can be applied in appropriate combination.

[0089] (Variation 1) In the sheet structure 100 of the above embodiment, one waterproof sheet 3 is configured to cover multiple power generation sections 2, but as shown in Figure 4, one waterproof sheet 3 may be provided for one frame opening surface A1.

[0090] 4, the power generating sheet body 10 includes a sheet member 1, a plurality of power generating sections 2, a sealant 4, a plurality of waterproof sheets 3, and a sealing edge material 5. The sheet member 1, the plurality of power generating sections 2, and the sealant 4 are the same as those in the above embodiment, and therefore description thereof will be omitted.

[0091] The waterproof sheet 3 is formed to a size corresponding to the frame opening surface A1. The waterproof sheet 3 is flexible. Examples of materials used for the waterproof sheet 3 include plastic film, polyvinyl chloride, polyolefin, polyester, nylon, and composite materials thereof. The thickness of the sheet member 1 is preferably 50 μm or more, and more preferably 100 μm or more. The thickness of the waterproof sheet 3 is preferably 2000 μm or less, and more preferably 1000 μm or less.

[0092] The waterproof sheet 3 preferably has a tensile strength of 50 MPa or more, more preferably 80 MPa or more, and preferably has a tensile strength of 200 MPa or less, more preferably 120 MPa or less.

[0093] The sealing edge material 5 seals the outer edge of the waterproof sheet 3 over the entire length, with the power generation section 2 and sealant 4 disposed between the sheet member 1 and the waterproof sheet 3. The sealing edge material 5 comprises a first adhesive portion 51, a second adhesive portion 52, and a sealing portion 53 connecting the first adhesive portion 51 and the second adhesive portion 52. The first adhesive portion 51 is adhered to the front surface (upper surface in the figure) of the waterproof sheet 3. The second adhesive portion 52 is adhered to the front surface (upper surface in the figure) of the sheet member 1. The first adhesive portion 51, the sealing portion 53, and the second adhesive portion 52 are integrally formed.

[0094] Examples of the material for the sealing edge material 5 include tape materials made of butyl rubber, silicone rubber, and the like.

[0095] (Variation 2) As shown in FIG. 5, the power generating sheet body 10 may have a structure in which a photovoltaic power generating sheet P1 is attached onto a sheet member 1. For example, the photovoltaic power generating sheet P1 includes a back sheet 6, a plurality of power generating units 2, a waterproof sheet 3, a sealant 4, and a sealing edge material 5. The plurality of power generating units 2 and the waterproof sheet 3 have the same structure as in the modified example 1. The sealant 4 is common to the embodiment and modified example 1 in that it is filled between the sheet member 1 and the waterproof sheet 3, but is different in that it is filled in the space between the sheet member 1 and the waterproof sheet 3, which is formed by a sheet (here, the back sheet 6) other than the sheet member 1 arranged on the sheet member 1. The sealing edge material 5 is different from the modified example 1 in that the second adhesive portion 52 is adhered to the back sheet 6. The following is preferably used as the back sheet 6.

[0096] The back sheet 6 has flexibility. The material used for the back sheet 6 has a modulus of longitudinal elasticity of preferably 50 MPa or more, more preferably 80 MPa or more. The modulus of longitudinal elasticity is preferably 200 MPa or less, more preferably 120 MPa or less.

[0097] Examples of materials for the back sheet 6 include a plastic film and a plastic substrate.

[0098] The thickness of the back sheet 6 is preferably 50 μm or more, more preferably 100 μm or more, and is preferably 2000 μm or less, more preferably 1000 μm or less.

[0099] The sheet member 1 and the photovoltaic sheet are fixed together by, for example, bonding the back sheet 6 and the sheet member 1 together, or bonding the sealing edge material 5 and the sheet member 1 together.

[0100] (Other variations) In the above embodiment, a plurality of (eg, three) power generating units 2 are arranged within one frame opening surface A1, but the number of power generating units 2 arranged within one frame opening surface A1 may be one.

[0101] In the above embodiment, the frame 8 supports the sheet member 1 from below the sheet member 1, but in the present invention, the frame 8 may support the sheet member 1 from above. For example, the frame 8 may support the sheet member 1 by being disposed between the sheet member 1 and the waterproof sheet 3.

[0102] Also, the sealant 4 may not be present. In this case, the power generation section 2 is disposed above the sheet member 1 so as to be in contact with the sheet member 1. The waterproof sheet 3 is disposed above the sheet member 1 and the power generation section 2 so as to be in contact with the sheet member 1 and the power generation section 2. The waterproof sheet 3 is preferably in close contact with the power generation section 2 and the sheet member 1. This makes it possible to prevent water from entering the power generation section 2 through between the waterproof sheet 3 and the sheet member 1. Even in this case, the multiple frames 8 support the sheet member 1 at a position offset from the power generation section 2 (more specifically, at a position offset from the power generation section 2 when the power generation section 2 is viewed in a plan view).

[0103] Moreover, as shown in FIG. 6, a reinforcing material 11 (e.g., a reinforcing sheet) is preferably disposed between the frame 8 and the sheet member 1. The reinforcing material 11 reinforces the sheet member 1. The elastic modulus of the reinforcing material 11 is preferably greater than that of the sheet member 1. The reinforcing material 11 is fixed to the sheet member 1, for example. The reinforcing material 11 can be fixed to the sheet member 1 by, for example, adhesion, sewing, welding, etc. By disposing the reinforcing material 11 between the frame 8 and the sheet member 1, it is possible to reduce stretching or tearing of the sheet member 1 due to the weight of rainwater that accumulates on the power generation unit 2 and the waterproof sheet 3.

[0104] Examples of the reinforcing material 11 include a rubber sheet, a synthetic resin sheet, a glass fiber sheet, a fiber reinforced sheet, a carbon fiber reinforced composite sheet, a carbon sheet, and a metal mesh sheet.

[0105] The sheet member 1 is preferably fixed to the frame 8. The sheet member 1 is preferably fixed over the entire length of the portion in contact with the frame 8, but may be fixed only in a portion. The sheet member 1 may be fixed only to a portion of the frame 8 that has a slope. Note that the case in which the sheet member 1 is fixed to the frame 8 via a reinforcing member 11 also falls within the category of "the sheet member 1 is fixed to the frame 8". The sheet member 1 can be fixed to the frame 8 by, for example, adhesion, wrapping with a band or string, clamping with a bracket, hanging with a hook, magnetic attachment, or the like.

[0106] In the above embodiment, a photovoltaic sheet having a photoelectric conversion layer 242 containing a perovskite compound has been described as one form of a photovoltaic sheet, but as for the mounting structure, any flexible solar cell sheet can achieve the same effect. Furthermore, as for the mounting structure, not only a photovoltaic sheet that generates power from light, but also a sheet that converts light energy into another energy (light energy conversion sheet) may be used. Examples of light energy conversion sheets include, in addition to photovoltaic sheets, light heat generating sheets that convert light energy into thermal energy (sunlight-driven thermoelectric conversion devices), etc.

[0107] In this specification, "parallel" means substantially "parallel," and includes not only cases where the subject straight lines or surfaces do not intersect even when extended, but also cases where the subject lines or surfaces intersect within a range of 10° when extended.

[0108] Furthermore, in this specification, expressions that are distinguished by the presence or absence of "part", such as "end" and "end", are used. For example, "end" means the end part of an object, while "end" means a region having a certain range that includes the "end". Any point that is within a certain range that includes the end is considered to be an "end". The same applies to other expressions that include "part".

[0109] <Action and effect> As described above, in the sheet structure 100 of this embodiment, multiple frames 8 support the sheet member 1 at a position offset from the power generation section 2, thereby preventing the power generation section 2 from bending and suppressing damage to the power generation section 2.

[0110] Moreover, the minimum distance between the power generating unit 2 and each of the plurality of frames 8 is 5 mm or more. Moreover, the minimum distance between the power generating unit 2 and each of the plurality of frames 8 is 10 times or more the thickness of the power generating unit 2. This makes it possible to further prevent damage to the power generating unit 2.

[0111] In addition, since a reinforcing material that reinforces the sheet member 1 is arranged between the frame 8 and the sheet member 1, stretching or tearing of the sheet member 1 due to the weight of rainwater that accumulates on the power generation section 2 or the waterproof sheet 3 can be reduced.

[0112] In addition, since the elastic modulus of the reinforcing material is greater than the elastic modulus of the sheet member 1, the sheet member 1 can be further prevented from being stretched or torn.

[0113] In addition, because the sheet member 1 is fixed to the frame 8, it is possible to reduce the displacement of the sheet member 1 relative to the frame 8 caused by the weight of rainwater that accumulates on the power generation unit 2 and the waterproof sheet 3. In addition, because the sheet member 1 does not slip off the frame 8, it is possible to prevent unintended stress from being generated in the power generation unit 2. [Explanation of symbols]

[0114] 1 Sheet material 2. Power Generation Division 3. Tarpaulin 4. Sealant 7 skeleton 8 Frames 100 Sheet Structure d minimum distance

Claims

1. A structure having a plurality of frames; a sheet member supported by the plurality of frames; a power generation unit that is disposed above the sheet member and generates electricity using sunlight; a waterproof sheet disposed above the sheet member and the power generation unit and facing an outdoor space; A sealant filled between the sheet member and the waterproof sheet; Equipped with The plurality of frames support the sheet member at a position offset from the power generation unit. Seat structure.

2. A structure having a plurality of frames; a sheet member supported by the plurality of frames; a power generation unit that is disposed above the sheet member so as to be in contact with the sheet member and that generates electricity using sunlight; a waterproof sheet disposed above the sheet member and the power generation unit so as to be in contact with the sheet member and the power generation unit and facing an outdoor space; Equipped with The plurality of frames support the sheet member at a position offset from the power generation unit. Seat structure.

3. a minimum distance between the power generating unit and each of the plurality of frames is 5 mm or more; 3. A seat structure according to claim 1 or 2.

4. a minimum distance between the power generating unit and each of the plurality of frames is 10 times or more as large as a thickness of the power generating unit; 3. A seat structure according to claim 1 or 2.

5. A reinforcing material for reinforcing the sheet member is disposed between the frame and the sheet member.

3. A seat structure according to claim 1 or 2.

6. The elastic modulus of the reinforcing material is greater than the elastic modulus of the sheet member.

6. The seat structure of claim 5.

7. The sheet member is fixed to the frame.

3. A seat structure according to claim 1 or 2.

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