Soundproof wall with solar panels and method for installing solar panels

Abstract

We provide a soundproof wall with solar panels that is easy to install. [Solution] A soundproof wall with a solar cell, comprising a soundproof wall equipped with a soundproof panel, a flexible, flat solar cell located on one surface of the soundproof panel, and a pair of supports that support a pair of opposing ends of the solar cell, wherein the pair of supports have grooves for accommodating the ends of the solar cell, the ends of the solar cell are accommodated in the grooves, and the grooves are formed so that the ends of the solar cell can be inserted from below vertically, above vertically, or horizontally.

Description

Technical Field

[0001] The present invention relates to a soundproof wall with a solar cell and a method for attaching the solar cell.

Background Art

[0002] For example, it has been proposed to attach a solar cell to a soundproof wall installed on a railway or a road shoulder to give the soundproof wall a power generation function. Generally, since the lifespan of a solar cell is shorter than that of a soundproof wall, it is necessary to be able to remove and replace the solar cell. Patent Document 1 relates to a method of attaching a thick solar panel to a soundproof wall in which a sound-absorbing panel is fitted between flanges of H-shaped steel installed at regular intervals. A thin plate-shaped support member is dropped into the gap between the sound-absorbing panel and the flange from above, and a frame for detachably supporting the solar panel is fixed to the support member, and a method of dropping and installing the solar panel into the frame from above has been proposed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique of Patent Document 1, the work is not easy because a large non-flexible solar panel with a large thickness is attached. In addition, since heavy machinery may be required, it may not be applicable depending on the terrain of the installation location of the soundproof wall. Further, since the frame for supporting the solar panel and the sound-absorbing panel are not integrally joined, it cannot be said to be stable against wind pressure. An object of the present invention is to provide a soundproof wall with a solar cell that enables easy attachment work of the solar cell.

Means for Solving the Problems

[0005] The present invention has the following aspects. <1> The soundproof wall comprises a soundproofing panel, a flexible, flat solar cell located on one side of the soundproofing panel, and a pair of supports that support the opposing ends of the solar cell. A soundproof wall with solar cells, wherein the pair of supports have grooves for accommodating the ends of the solar cells, the ends of the solar cells are accommodated in the grooves, and the grooves are formed so that the ends of the solar cells can be inserted from below vertically, above vertically, or horizontally. <2> Furthermore, the solar cell comprises a third support that supports one end different from the pair of opposing ends, <1> Soundproof wall with solar panels as described. <3> The solar cell has a flexible holding plate and a power generation unit located on one surface of the holding plate. <1> or <2> Soundproof wall with solar panels as described. <4> At the end of the solar cell, there is a non-overlapping portion where the edge of the power generation portion is located inward from the edge of the retaining plate and the power generation portion does not exist on the retaining plate, and the groove portion has a first groove portion that accommodates and supports the non-overlapping portion and a second groove portion that accommodates the end of the power generation portion spaced apart from the power generation portion. <3> Soundproof wall with solar panels as described. <5> In the second groove, the distance from the power generation unit to the support increases toward the inside of the power generation unit. <4> Soundproof wall with solar panels as described. <6> The solar cell comprises an integrated member that integrates the retaining plate and the power generation unit, the integrated member having a through portion that penetrates the retaining plate and the power generation unit, and a protruding portion that protrudes from the side of the retaining plate opposite to the power generation unit side, and the soundproof panel has a groove on the side facing the solar cell that is parallel to the insertion direction of the end of the solar cell, and the protruding portion of the integrated member is housed in the groove. <3> Soundproof wall with solar panels as described. <7> There is a mounting member for attaching the soundproof panel to the soundproof wall, and the mounting member is housed in the recess. <6> Soundproof wall with solar panels as described. <8> There is a fixing member that detachably secures the solar cell to the soundproof panel. <1> ~ <7> A soundproof wall with solar panels as described in any one of the items. <9> The fixing member has a bolt that penetrates the solar cell. <8> Soundproof wall with solar panels as described. <10> The fixing member has a frame that fixes the end of the solar cell. <8> Soundproof wall with solar panels as described. <11> The solar cell has a power generation section containing a perovskite compound, <1> ~ <10> A soundproof wall with solar panels as described in any one of the items. <12> A soundproof wall with a solar cell, comprising a soundproofing panel, a flat solar cell located on one surface of the soundproofing panel, and a pair of supports that support a pair of opposing ends of the solar cell, wherein the pair of supports have grooves for accommodating the ends of the solar cell, the solar cell has a power generation section containing a perovskite compound, and the grooves are formed so that the ends of the solar cell can be inserted from vertically below, vertically above, or horizontally. <13> A method for attaching a flexible, flat solar cell to a soundproof wall equipped with a soundproof panel, wherein a pair of supports having grooves for accommodating a pair of opposing ends of the solar cell is provided on one surface of the soundproof panel, and the solar cell is bent while inserting the pair of ends into the grooves from vertically below, vertically above, or horizontally. [Effects of the Invention]

[0006] According to the present invention, a soundproof wall with solar cells that facilitates the installation of solar cells can be obtained. [Brief explanation of the drawing]

[0007] [Figure 1] This figure shows a part of a soundproof wall with solar cells according to one embodiment of the present invention, where (A) is a perspective view from the front and (B) is a perspective view from the rear. [Figure 2] This is a perspective view showing an enlarged portion of Figure 1(B). [Figure 3] It is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] It is a perspective view showing a method of attaching a solar cell in the embodiment of FIG. 1. [Figure 5] It is a cross-sectional view showing an example of a fixing member for fixing a holding plate to a soundproof panel. [Figure 6] It is a view showing a part of a soundproof wall with a solar cell according to another embodiment of the present invention, (A) is a perspective view seen from the front side, and (B) is a perspective view seen from the back side. [Figure 7] It is a perspective view showing a method of attaching a solar cell in the embodiment of FIG. 6. [Figure 8] It is a plan view showing a part of a soundproof wall with a solar cell according to another embodiment of the present invention. [Figure 9] It is a perspective view showing a method of attaching a solar cell in the embodiment of FIG. 8. [Figure 10] It is a cross-sectional view showing a modified example of FIG. 3. [Figure 11] It is a plan view showing a modified example of the embodiment of FIG. 1. [Figure 12] It is a plan view showing another modified example of the embodiment of FIG. 1. [Figure 13] It is a plan view showing another modified example of the embodiment of FIG. 1. [Figure 14] It is a plan view showing a modified example of the embodiment of FIG. 8. [Figure 15] It is a plan view showing another modified example of the embodiment of FIG. 8. [Figure 16] It is a cross-sectional view showing another modified example of FIG. 3. [Figure 17] It is a view showing a state before attaching a solar cell of a soundproof wall with a solar cell according to another embodiment of the present invention, (A) is a cross-sectional view seen from above, and (B) is a plan view. [Figure 18] In the embodiment of FIG. 17, it is a view showing a state after attaching a solar cell, (A) is a cross-sectional view seen from above, and (B) is a plan view. [Figure 19] It is a cross-sectional view showing a magnified part of FIG. 18(A).

Best Mode for Carrying Out the Invention

[0008] Hereinafter, with reference to the drawings, a soundproof wall with a solar cell according to an embodiment of the present invention (hereinafter, also simply referred to as a "soundproof wall") and a method for attaching the solar cell will be described. The following drawings are schematic diagrams for easily explaining the configuration, and the dimensional ratios of each component may be different from the actual ones. In this specification, the surface of the soundproof wall on the noise source side is referred to as the front, and the surface on the opposite side is referred to as the back.

[0009] ≪First Embodiment≫ <Soundproof Wall with Solar Cell> As shown in FIGS. 1 and 2, the soundproof wall 11 with a solar cell according to the present embodiment includes a rectangular flat soundproof panel 12, a solar cell 20 detachably provided on the back of the soundproof panel 12, and supports 31 and 32 for detachably supporting the ends of the solar cell 20. As shown in FIG. 1(A), a plurality of soundproof panels 12 are arranged and fixed to form a soundproof wall. That is, on the foundation 15, a plurality of columns 14 extending in the vertical direction are erected at intervals in the horizontal direction, a plurality of soundproof panels 12 are connected by a connecting member 13, and the connecting member 13 is fixed to the column 14. The column 14 may be, for example, an H-shaped steel. The connecting member 13 may be, for example, a lip channel steel. The framework material (such as the column 14, the connecting member 13, etc.) for attaching the soundproof panel 12 to the soundproof wall is preferably made of metal from the viewpoint of long-term durability. By being made of metal, it is possible to achieve both strength and weight. Note that the length direction of the column 14 may be slightly inclined with respect to the vertical direction (for example, the angle between the length direction of the column 14 and the vertical direction is more than 0° and 45° or less), and in that case, the length direction of the column 14 is regarded as the vertical direction.

[0010] As shown in FIG. 1(B), the solar cell 20 includes a flexible holding plate 21, a power generation unit 23 integrally provided on one surface of the holding plate 21, and a junction box 24 for aggregating the electricity generated by the power generation unit 23. In this specification, "flexible" means that the solar cell can bend to the extent that it can be attached to the soundproof panel while being bent, as described later in the solar cell mounting method. For example, it is preferable that a flat solar cell is not damaged when bent along the circumference of a cylinder with a radius of 500 mm, and returns to a flat shape when the bending force is released. The junction box 24 is located in the power generation unit 23 and is electrically connected to the power conditioner 26 via a cable 25. For the power generation unit 23, for example, a perovskite crystal sensitized solar cell (PSC), a dye sensitized solar cell (DSC), or an organic thin-film solar cell (OPV) can be used. PSCs are particularly preferred.

[0011] The material of the retaining plate 21 is preferably one that is rigid and has excellent durability and weather resistance. It is even more preferable that the retaining plate 21 and the base material of the soundproofing panel 12 are made of the same material. For the retaining plate 21, for example, plated steel sheet (e.g., Nippon Steel Corporation's product name ZAM®), stainless steel sheet, aluminum sheet, or highly weather-resistant plastic sheet can be used. Plated steel sheet is preferred in terms of galvanic corrosion resistance and strength.

[0012] The power generation unit 23 is laminated and integrated onto one surface of the retaining plate 21 to form a solar cell 20. At this time, the power generation unit 23 is oriented so that the junction box 24 is on the opposite side from the retaining plate 21, and the retaining plate 21 and the power generation unit 23 are fixed in close contact and integrated. For example, adhesive can be used as a fixing means.

[0013] As a configuration for a solar cell having a power generation section containing a perovskite compound, known configurations such as the photovoltaic sheet described in International Publication No. 2023 / 182435 and the photovoltaic sheet described in Japanese Patent Publication No. 2024-71307 can be used as appropriate. The power generation section of the photovoltaic sheet comprises a power generation layer having a photoelectric conversion layer containing a perovskite compound, a hole transport layer, and an electron transport layer, a plurality of power generation cells having electrodes (anodes) and a translucent conductive layer (cathodes), and a sealing section that prevents water from entering the power generation cells. In a power generation cell, the photoelectric conversion layer of the power generation layer absorbs light and performs photoelectric conversion, generating electrons and holes in the photoelectric conversion layer. These electrons are extracted to the electrode (anode) via the electron transport layer, and the holes are extracted to the translucent conductive layer (cathode) via the hole transport layer, thereby generating an electric current from the translucent conductive layer and the electrode (i.e., power generation occurs). Photovoltaic sheets using perovskite have high power generation efficiency, can be formed relatively thinly, and are very flexible due to being organic materials. Perovskite compounds are perovskite crystalline structures and structures having similar crystals. Perovskite crystalline structures are represented by the compositional formula ABX3. In this compositional 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. There are no particular restrictions on the organic group of the organic cation constituting the A site; examples include alkylammonium derivatives and formamidinium derivatives. The organic cation constituting the A site may be one type or two or more types. There are no particular restrictions on the metal of the metal cation constituting the B site; for example, 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. There are no particular restrictions on the halogens of the halogen anions that constitute the X site; for example, F, Cl, Br, I, etc. The halogen anions that constitute the X site may be one type or two or more types.

[0014] As shown in Figures 1(B) and 2-4, the retaining plate 21 and the power generation unit 23 are elongated rectangles with their longer sides extending vertically. The retaining plate 21 is slightly larger than the power generation unit 23. That is, the edge of the power generation unit 23 is located inward from the edge of the retaining plate 21. At both ends of the holding plate 21 in the horizontal direction and both ends in the vertical direction, there are strip-shaped non-overlapping sections 21a, 21b, and 21c where the power generation section 23 is not present. At both ends of the power generation unit 23 in the horizontal direction, the distance W1 from the edge of the power generation unit 23 to the edge of the retaining plate 21 (width of the non-overlapping portion 21a) is not particularly limited. As will be described later, it is sufficient that the edge of the power generation unit 23 is located outside the groove when the non-overlapping portion 21a is inserted into the groove of the pair of support members 31. At the lower end of the power generation unit 23, the distance W2 from the edge of the power generation unit 23 to the edge of the retaining plate 21 (width of the non-overlapping portion 21b) is not particularly limited, and as will be described later, it is preferable that the size is such that it is easy to work with when inserting the non-overlapping portion 21a into the groove of the pair of support members 31 from the vertically downward side. At the upper end of the power generation section 23, the distance W3 from the edge of the power generation section 23 to the edge of the retaining plate 21 (width of the non-overlapping section 21c) is not particularly limited. As will be described later, it is sufficient that the edge of the power generation section 23 is located outside the groove when the non-overlapping section 21c is inserted into the groove of the third support 32.

[0015] The thickness T1 of the retaining plate 21 should be such that it maintains flexibility. For example, if the retaining plate 21 is made of steel, a thickness T1 of 0.6 mm or less is preferable. The thickness T2 of the power generation section 23 is not particularly limited and can be appropriately designed within a range of thicknesses that maintain flexibility.

[0016] In this embodiment, the soundproofing panel 12 is a vertically elongated rectangle with its longer side extending in the vertical direction. The materials constituting the soundproof panel 12 may be, for example, sound-absorbing materials, sound-insulating materials, vibration-damping materials, etc., or combinations thereof. The sound-absorbing materials, sound-insulating materials, and vibration-damping materials may be known materials. Examples of sound-absorbing materials include rock wool, polyester fibers, urethane-based sound-absorbing materials, and phenol-based sound-absorbing materials. The sound insulation material should preferably be made of a material with a large mass per unit area. Examples include metals such as steel (ZAM steel plate), concrete, rubber, and fiber-reinforced plastic (FRP). Examples of materials used for vibration damping include chloroprene rubber, polyurethane, and butyl rubber.

[0017] The holding plate 21 of the solar cell 20 is smaller than the soundproof panel 12. A smaller difference between the area of ​​the soundproof panel 12 and the area of ​​the holding plate 21 is preferable because it allows for a larger area of ​​the power generation unit 23 and thus a larger power generation area.

[0018] The dimensions of the soundproof panel 12 may be, for example, 2000 to 3500 mm for the longer side extending vertically and 200 to 1000 mm for the shorter side extending horizontally. The thickness of the soundproof panel 12 may be, for example, 50 to 150 mm. The dimensions of the retaining plate 21 may be, for example, 1600 to 2600 mm for the longer side extending vertically and 150 to 950 mm for the shorter side extending horizontally.

[0019] In the horizontal direction of the sound barrier 11, the distance (pitch) between the centers of adjacent support columns 14 may be, for example, 1800 to 3000 mm, or 2000 to 3000 mm. In the vertical direction of the sound barrier 11, the distance (pitch) between the centers of connecting members 13 may be, for example, up to approximately 1050 mm.

[0020] When attaching the solar cells 20 to the soundproof panel 12, it is preferable to position the support members 31 slightly inward from the edges of the soundproof panel 12 at both horizontal ends of the soundproof panel 12. It is also preferable to provide bolts 16 (mounting members) that detachably secure the soundproof panel 12 to the connecting member 13 in the space at the edge of the soundproof panel 12 where the solar cells 20 and support members 31 are not present. When attaching the solar cell 20 to the soundproof panel 12, it is preferable to position the upper end of the retaining plate 21 slightly inward from the upper end of the soundproof panel 12. It is also preferable to provide the support 32 in the space where the solar cell 20 is not located at the upper end of the soundproof panel 12.

[0021] When attaching the solar cell 20 to the soundproof panel 12, it is preferable that a blank area 17 where no solar cell is present exists at the bottom of the soundproof panel 12. Providing a blank area 17 allows the power generation portion 23 of the solar cell 20 to be moved away from the ground so that it is less susceptible to moisture from the ground. From this viewpoint, the distance W4 from the lower edge of the power generation portion 23 to the lower edge of the soundproof panel 12 (the length of the blank area 17 in the direction in which the solar cell 20 is inserted) is preferably 400 mm or more, and more preferably 450 mm or more. Furthermore, as will be described later, in order to ensure the ease of installation work in which the non-overlapping portion 21a of the solar cell 20 is inserted into the groove of the pair of support bodies 31 from the vertically downward side, the distance W5 from the lower end of the support body 31 to the lower edge of the soundproof panel 12 (length in the insertion direction of the solar cell 20) is preferably 500 mm or more. The upper limit of W5 is not particularly limited, but as will be described later, when attaching and detaching the solar cell 20 to the soundproof panel 12 while bending it, it may be 650 mm or less, for example.

[0022] <How to install solar panels> As shown in Figures 1(B), 2 to 4, a pair of supports 31, 31 and a third support 32 are provided on the back surface of the soundproof panel 12 in order to detachably attach the solar cell 20 to the soundproof panel 12. These supports detachably support the ends of the solar cell 20. In this embodiment, the pair of support members 31, 31 extend vertically, and the third support member 32 extends horizontally. The upper ends of the pair of support members 31, 31 and both ends of the third support member 32 are in contact, and when viewed from the rear side in a plan view, the support members 31, 31 and the third support member 32 form a U-shape.

[0023] As shown in Figure 3, the pair of support members 31, 31 form grooves 33 between the soundproof panel 12 and the support members 31, each accommodating the non-overlapping portions 21a of the horizontal ends (a pair of opposing ends) of the retaining plate 21. The lower end of the groove 33 is open downwards, and the end of the solar cell 20 is formed to be inserted into the groove 33 from below in the vertical direction. The third support 32 has a groove (not shown) between the soundproof panel 12 and the third support 32 that accommodates the non-overlapping portion 21c of the upper end of the retaining plate 21 (one end different from the pair of opposing ends).

[0024] The cross-sectional shape of the support 31 and the third support 32 perpendicular to the vertical direction is approximately Z-shaped. That is, it consists of a first flat plate portion 41 that is in close contact with the back surface of the soundproof panel 12, a second flat plate portion 42 that is spaced at a certain distance from the back surface of the soundproof panel 12 and forms a groove portion 33, and a stepped portion 43 at the boundary between the first flat plate portion 41 and the second flat plate portion 42. The material of the support 31 and the third support 32 may be, for example, steel. The first flat plate portion 41 may be fixed to the back surface of the soundproof panel 12 by means of fastening such as rivets 44, or by welding.

[0025] The height of the groove 33 that accommodates the non-overlapping portions 21a at both ends of the holding plate 21 in the horizontal direction, i.e., the distance D1 between the soundproof panel 12 and the support 31 in a direction perpendicular to the back surface of the soundproof panel 12, may be, for example, 0.8 to 2.3 mm. The aforementioned D1 is greater than the thickness T1 of the holding plate 21. The difference between D1 and T1 (D1-T1) may be, for example, 0.2 to 1.7 mm. Although not shown in the diagram, the height of the groove that accommodates the non-overlapping portion 21c at the upper end of the retaining plate 21, i.e., the distance D2 between the soundproofing panel 12 and the third support 32 in a direction perpendicular to the back surface of the soundproofing panel 12, may be, for example, 0.8 to 2.3 mm. The aforementioned D2 is greater than the thickness T1 of the retaining plate 21. The difference between D2 and T1 (D2-T1) may be, for example, 0.2 to 1.7 mm.

[0026] The pair of support members 31, 31 and the third support member 32 on the back of the soundproof panel 12 may be provided before fixing the soundproof panel 12 to the support column 14, or they may be attached to the soundproof panel 12 while it is fixed to the support column 14.

[0027] When attaching the solar cell 20 to the soundproof panel 12, as shown in Figure 4, the non-overlapping portions 21a of both horizontal ends (a pair of opposing ends) of the retaining plate 21 are inserted vertically into the grooves of the pair of support members 31, 31 from the lower end of the support member 31. At this time, the retaining plate 21 is inserted with the power generation unit 23 facing outwards (opposite to the soundproof panel 12). Next, the retaining plate 21 is slid vertically toward the upper end, and the non-overlapping portion 21c of the upper end of the retaining plate 21 is inserted into the groove of the third support member 32 to complete the insertion.

[0028] After the insertion of the retaining plate 21 is complete, the non-overlapping portion 21b at the lower end of the retaining plate 21 is detachably fixed to the soundproof panel 12 to prevent the solar cell 20 from falling. As fixing members between the retaining plate 21 and the soundproof panel 12, a bolt 52 that penetrates the solar cell 20 and a nut 51 can be used, as shown in Figure 5. The nut 51 is embedded in a predetermined position in the soundproof panel 12 in advance. Also, a hole 50 for inserting the bolt 52 is provided in advance in the non-overlapping portion 21b at the lower end of the retaining plate 21. The embedding position of the nut 51 and the drilling position of the hole 50 are designed so that the nut 51 and the hole 50 overlap when the insertion of the retaining plate 21 is complete. Once the insertion of the retaining plate 21 is complete, the bolt 52 is inserted through the hole 50 in the non-overlapping portion 21b and fastened with the nut 51.

[0029] Because the solar cell 20 is flexible, as shown in Figure 4, the solar cell 20 can be bent and slid upward. That is, even if the support 31 extends in the vertical direction, the retaining plate 21 can be slid vertically upward while applying an upward force to the retaining plate 21. Therefore, the solar cell 20 can be easily attached to the soundproof panel 12 while it is fixed to the support column 14. To replace the solar cell 20, the bolt 52 is removed, the lower end of the retaining plate 21 is grasped, and the retaining plate 21 is bent and pulled forward, allowing the solar cell 20 to be easily removed from the soundproof panel 12.

[0030] According to this embodiment, the solar cells 20 can be attached and detached by operating the sound barrier 11 from vertically below, making the attachment and detachment of the solar cells 20 easy and improving work efficiency. Furthermore, since the attachment and detachment can be done without using heavy machinery, there are fewer restrictions on the location where the sound barrier can be installed. For example, a location where attachment and detachment can be done without using heavy machinery is preferable, such as an embankment section. In addition, the soundproof panel 12 and the supports 31 and 32 are fixed together, and the solar cells 20 supported by the supports 31 and 32 are in close proximity to the soundproof panel 12, thus providing high stability against wind pressure. Furthermore, because the solar cell 20 is thin, it is easy to make it lightweight. If the solar cell 20 is thin and lightweight, it is easy to make the sound barrier 11 thinner and lighter.

[0031] In this embodiment, the third support 32 may be omitted. Providing the third support 32 is preferable because it facilitates the positioning of the holding plate 21 and improves workability. Furthermore, if the power generation section 23 of the solar cell 20 is flexible, the retaining plate 21 does not need to be provided.

[0032] In this embodiment, multiple soundproof panels 12 are connected by connecting members 13 and fixed to the support columns 14. However, the spacing (pitch) of the support columns 14 may be equal to the horizontal width of the soundproof panels 12, and the soundproof panels 12 may be directly fixed to the support columns 14. Although not shown in the diagram, the cable 25 of the solar cell 20 may be detachably fixed to the soundproof panel 12 or the like using a fixing jig such as a cord clip.

[0033] ≪Second Embodiment≫ <Soundproof wall with solar panels> The main difference between this embodiment and the first embodiment is that the soundproofing panel 112 has the shape of a horizontally elongated rectangle with its longer side extending horizontally. As shown in Figure 6, the soundproof wall 111 with solar cells in this embodiment includes a rectangular flat soundproof panel 112, a solar cell 120 detachably mounted on the back of the soundproof panel 112, and supports 131 and 132 that detachably support the ends of the solar cell 120. As shown in Figure 6(A), a soundproof wall is formed by arranging and fixing multiple soundproof panels 112 side by side. Specifically, multiple vertically extending support columns 114 are erected on the foundation 15 at horizontal intervals, and multiple soundproof panels 112 are stacked vertically and arranged side by side, with each soundproof panel 112 fixed to a support column 114. The support columns 114 may be, for example, H-shaped steel. In the example in Figure 6, each soundproof panel 112 is fixed to a frame that fixes the end of the inner surface 114a of the rear flange of the H-shaped steel. Similar to the first embodiment, the length direction of the support column 114 may be slightly oblique to the vertical direction, in which case the length direction of the support column 114 is considered to be the vertical direction.

[0034] In this embodiment, a pair of support members 131, 131 extend horizontally, and a third support member 132 is located on one end of support member 131. The third support member 132 extends vertically. The material of the support members and the method of fixing the support members to the soundproof panel are the same as in the first embodiment. Hereinafter, of the two ends of the pair of support bodies 131, the end where the third support body 132 is located will be referred to as the "butt end," and the other end where the third support body 132 is not located will be referred to as the "attachment / detachment operation side."

[0035] The solar cell 120, similar to the first embodiment, comprises a flexible holding plate 121 and a power generation unit 123 laminated and integrated on one surface of the holding plate 121. The configuration and materials of the power generation unit 123, the material of the retaining plate 121, and the method of fixing the power generation unit 123 and the retaining plate 121 are the same as in the first embodiment. Note that the cable 25 and power conditioner 26 are not shown in Figure 6(B). The solar cell cables may be detachably fixed to the support pole using fixing jigs such as cord clips.

[0036] As shown in Figures 6(B) and 7, the retaining plate 121 and the power generation unit 123 are horizontally elongated rectangles with their longer sides extending horizontally. The retaining plate 121 is slightly larger than the power generation unit 123. At both ends of the retaining plate 121 in the vertical direction and both ends in the horizontal direction, there are strip-shaped non-overlapping sections 121a, 121b, and 121c where the power generation section 123 is not present. At both ends of the power generation unit 123 in the vertical direction, the distance W11 from the edge of the power generation unit 123 to the edge of the retaining plate 121 (width of the non-overlapping portion 121a) is not particularly limited. As will be described later, it is sufficient that the edge of the power generation unit 123 is located outside the groove when the non-overlapping portion 121a is inserted into the groove of the pair of support members 131. At the end of the power generation unit 123 on the horizontal attachment / detachment side, the distance W12 from the edge of the power generation unit 123 to the edge of the retaining plate 121 (width of the non-overlapping portion 121b) is not particularly limited, and as will be described later, it is preferable that the size is such that it is easy to work with when inserting the non-overlapping portion 121a into the groove of the pair of support members 131 from the horizontal direction. At the horizontal abutment end of the power generation unit 123, the distance W13 from the edge of the power generation unit 123 to the edge of the retaining plate 121 (width of the non-overlapping portion 121c) is not particularly limited. As will be described later, it is sufficient that the edge of the power generation unit 123 is located outside the groove when the non-overlapping portion 121c is inserted into the groove of the third support 132. The thickness T11 of the retaining plate 121 should be such that it maintains flexibility. For example, if the retaining plate 121 is a steel plate, a thickness T11 of 0.6 mm or less is preferable.

[0037] The materials constituting the soundproof panel 112 are the same as those in the first embodiment. The holding plate 121 of the solar cell 120 is smaller than the soundproof panel 112. A smaller difference between the area of ​​the soundproof panel 112 and the area of ​​the holding plate 121 is preferable because it allows for a larger area of ​​the power generation unit 123 and thus a larger power generation area. When attaching the solar cells 120 to the soundproof panel 112, it is preferable to position the solar cells 120 slightly inward from the edges of the soundproof panel 112 at both horizontal ends of the soundproof panel 112. It is preferable to provide bolts (not shown) for detachably fixing the soundproof panel 112 to the support column 114 in the space at both horizontal ends of the soundproof panel 112 where the solar cells 120 and support column 132 are not present. When attaching the solar cells 120 to the soundproof panel 112, it is preferable to position the edges of the solar cells 120 slightly inward from the edges of the soundproof panel 112 at both vertical ends of the soundproof panel 112. It is also preferable to provide a support 131 in the space at both vertical ends of the soundproof panel 112 where the solar cells 120 are not present.

[0038] <How to install solar panels> As shown in Figures 6(B) and 7, a pair of supports 131, 131 and a third support 132 are provided on the back surface of the soundproof panel 112 in order to detachably attach the solar cell 120 to the soundproof panel 112. These supports detachably support the ends of the solar cell 120. In this embodiment, both ends of the third support 132, which extends vertically, are in contact with one end of the pair of support 131, 131, and when viewed from the back side in a plan view, the support 131, 131 and the third support 132 form a U-shape.

[0039] The pair of support members 131, 131 each have grooves between the soundproof panel 112 and the support members 131 that accommodate the non-overlapping portions 121a of the vertical ends (a pair of opposing ends) of the retaining plate 121. The ends of the grooves of the pair of support members 131, 131 on the attachment / detachment side are open outward in the horizontal direction, and the ends of the solar cell 120 are formed to be insertable into the grooves from the horizontal direction. The third support 132 has a groove formed between the soundproof panel 112 and the third support 132 that accommodates the non-overlapping portion 121c of the abutting end of the retaining plate 121 (one end different from the pair of opposing ends).

[0040] The cross-sectional shapes of the pair of supports 131 and the third support 132 are the same as in the first embodiment. In the pair of support members 131, the height of the groove that accommodates the non-overlapping portion 121a, i.e., the distance D11 between the soundproof panel 112 and the pair of support members 131 in a direction perpendicular to the back surface of the soundproof panel 112, may be, for example, 0.8 to 2.3 mm. The D11 is greater than the thickness T11 of the retaining plate 121. The difference between D11 and T11 (D11-T11) may be, for example, 0.2 to 1.7 mm. In the third support 132, the height of the groove that accommodates the non-overlapping portion 121c, i.e., the distance D12 between the soundproof panel 112 and the third support 132 in a direction perpendicular to the back surface of the soundproof panel 112, may be, for example, 0.8 to 2.3 mm. The D12 is greater than the thickness T11 of the retaining plate 121. The difference between D12 and T11 (D12-T11) may be, for example, 0.2 to 1.7 mm.

[0041] The pair of supports 131, 131 and the third support 132 on the back of the soundproof panel 112 may be provided before fixing the soundproof panel 112 to the support column 114, or they may be provided on the soundproof panel 112 after it has been fixed to the support column 114.

[0042] When attaching the solar cell 120 to the soundproof panel 112, as shown in Figure 7, the non-overlapping portions 121a of both vertical ends (a pair of opposing ends) of the retaining plate 121 are inserted horizontally into the grooves of the pair of support members 131, 131, starting from the end of the support member 131 on the attachment / detachment side. At this time, the retaining plate 121 is inserted with the power generation unit 123 facing outwards (opposite to the soundproof panel 112). Next, the retaining plate 121 is slid horizontally toward the end, and the non-overlapping portion 121c of the end of the retaining plate 121 toward the end is inserted into the groove of the third support member 132 to complete the insertion. After the insertion of the retaining plate 121 is complete, the non-overlapping portion 121b of the end of the retaining plate 121 on the attachment / detachment side may be detachably fixed to the soundproof panel 112. The method of fixing the retaining plate 121 to the soundproof panel 112 may be the same as in the first embodiment, for example, using the nuts 51 and bolts 52 shown in Figure 5.

[0043] Because the solar cell 120 is flexible, it can be slid horizontally while being bent, as shown in Figure 7. Therefore, the solar cell 120 can be easily attached to the soundproof panel 112 while it is fixed to the support column 114. When replacing the solar cell 120, the solar cell 120 can be easily removed from the soundproof panel 112 by grasping the end of the retaining plate 121 on the attachment / detachment side and pulling the retaining plate 121 forward while bending it.

[0044] According to this embodiment, the solar cells 120 can be attached and detached by operating from the horizontal attachment / detachment side of the sound barrier 111, making the attachment and detachment of the solar cells 120 easy and efficient. Furthermore, since the attachment and detachment can be done without using heavy machinery, there are fewer restrictions on the installation location of the sound barrier. In addition, the soundproof panel 112 and the supports 131 and 132 are fixed together, and the solar cells 120 supported by the supports 131 and 132 are in close proximity to the soundproof panel 112, thus providing high stability against wind pressure. Furthermore, because the solar cell 120 is thin, it is easy to make it lightweight. If the solar cell 120 is thin and lightweight, the sound barrier wall 111 can also be made thinner and lighter.

[0045] In this embodiment, the third support 132 may be omitted. Providing the third support 132 is preferable because it facilitates the positioning of the holding plate 121 and improves workability. Furthermore, if the power generation section 123 of the solar cell 120 is flexible, the retaining plate 121 does not need to be provided.

[0046] ≪Third Embodiment≫ <Soundproof wall with solar panels> The difference between the soundproof wall 211 with solar cells in this embodiment and the first and second embodiments is that the insertion direction of the solar cells 220 is from the vertical upwards toward the downwards. As shown in Figures 8 and 9, the soundproof wall 211 with solar cells in this embodiment has solar cells 220 detachably mounted on the back of a soundproof panel 212, and support members 231, 231, 232 that detachably support the ends of the solar cells 220. The pair of support members 231, 231 extending vertically and the third support member 232 extending horizontally are U-shaped and each support three sides of the holding plate 221 of the solar cells 220. The third support member 232 supports the lower edge of the solar cells 220.

[0047] The solar cell 220, similar to the first embodiment, comprises a flexible holding plate 221 and a power generation unit 223 laminated and integrated on one surface of the holding plate 221. The configuration and materials of the power generation unit 223, the material of the retaining plate 221, and the method of fixing the power generation unit 223 and the retaining plate 221 are the same as in the first embodiment. Note that the bolt 16, cable 25, and power conditioner 26 are not shown in Figures 8 and 9.

[0048] It is preferable that a blank area 217 without solar cells exists at the bottom of the soundproof panel 212. The distance W5 from the third support 232 to the lower edge of the soundproof panel 212 (length of the blank area 217 in the vertical direction) is preferably 400 mm or more, and more preferably 450 mm or more.

[0049] With the solar cell 220 attached to the soundproof panel 212, the upper edge of the solar cell 220 does not protrude above the upper edge of the soundproof panel 212. The distance W6 from the upper edge of the solar cell 220 to the upper edge of the soundproof panel 212 is preferably 150 mm or less, more preferably 100 mm or less, and even more preferably 75 mm or less. Setting W6 to a small value increases the ratio of the area of ​​the solar cell 220 to the area of ​​the soundproof wall 211, thereby increasing the power generation efficiency. The lower limit of W6 is preferably 50 mm or more from the viewpoint of securing space for fixing the solar cell 220.

[0050] In the vertical direction, the length of the pair of support members 231 is shorter than the length of the solar cell 220. With the solar cell 220 attached to the sound panel 212, the upper ends of the pair of support members 231 are located below the upper ends of the solar cell 220. The distance W7 from the upper end of the pair of support members 231 to the upper edge of the soundproof panel 212 (length in the insertion direction of the solar cell 220) is preferably 500 mm or more. If W7 is greater than or equal to the lower limit, the solar cell 220 can be easily installed by inserting it into the groove of the pair of support members 231 from the vertical upper side while bending it without damaging it.

[0051] <How to install solar panels> The pair of support members 231, 231 each have grooves between the soundproof panel 212 and the support members 231 that accommodate both vertical ends (a pair of opposing ends) of the retaining plate 221. The upper ends of the grooves of the pair of support members 231, 231 are open upward, and the ends of the solar cell 120 are formed to be inserted into the grooves from vertically above. The third support 232 has a groove formed between the soundproof panel 212 and the third support 232 that accommodates the lower edge of the retaining plate 221.

[0052] When attaching the solar cell 220 to the soundproof panel 212, as shown in Figure 9, both horizontal ends (a pair of opposing ends) of the retaining plate 221 are inserted vertically into the grooves of the pair of support bodies 231, 231 from the upper end of the support body 231. Next, the retaining plate 221 is slid vertically toward the lower end, and the lower end of the retaining plate 221 is inserted into the groove of the third support body 232 to complete the insertion. After the retaining plate 221 has been inserted, the upper end of the retaining plate 221 is detachably fixed to the soundproof panel 212. The method of fixing the retaining plate 221 to the soundproof panel 212 may be the same as in the first embodiment, for example, by using the nuts 51 and bolts 52 shown in Figure 5.

[0053] Because the solar cell 220 is flexible, it can be slid downwards while being bent, as shown in Figure 9. Therefore, the solar cell 220 can be easily attached to the soundproof panel 212 while it is fixed to the support column. When replacing the solar cell 220, the solar cell 220 can be easily removed from the soundproof panel 212 by removing the fixing member that secures the upper end of the retaining plate 221 and pulling the retaining plate 221 forward while bending it.

[0054] According to this embodiment, the solar cells 220 can be attached and detached by sliding them vertically above the sound barrier 211 while bending the solar cells 220, making the attachment and detachment process easy and efficient. Furthermore, since the attachment and detachment process can be performed without using heavy machinery, there are fewer restrictions on the installation location of the sound barrier. In addition, since a third support is not provided at the upper end of the soundproof panel 212, the distance W6 from the upper edge of the solar cell 220 to the upper edge of the soundproof panel 212 can be reduced. Therefore, it is suitable for increasing the ratio of the area of ​​the solar cell 220 to the area of ​​the soundproof wall 211 and improving power generation efficiency.

[0055] ≪Extreme Variation 1≫ In the first, second, and third embodiments, the cross-sectional shapes of the supports 31, 131, 231 and the third supports 32, 132, 232 were made into a roughly Z shape as shown in Figure 3. However, any shape that has a surface that is spaced at a certain distance from the back surface of the soundproof panels 12, 112, 212 and forms a groove that accommodates the ends (preferably the non-overlapping portion) of the solar cells 20, 120, 220 is acceptable. For example, the cross-sectional shapes of the supports 31, 131, 231 and the third supports 32, 132, 232 may be approximately L-shaped as shown in Figure 10. The support in Figure 10 is formed by laminating a first flat plate-shaped member 61, which is narrower, and a second flat plate-shaped member 62, which is wider, so that one end in the width direction is flush with the surface. The first flat plate-shaped member 61 is placed in close contact with the back surface of the soundproof panels 12, 112, 212 and fixed with fastening means such as rivets 44. The thickness of the first flat plate-shaped member 61 is the height of the groove that accommodates the ends of the solar cells 20, 120, 220.

[0056] <<Variation 2>> In the first, second, and third embodiments, bolts 52 were used as fixing members to detachably secure the solar cells 20, 120, and 220 to the soundproof panels 12, 112, and 212, but the fixing members are not limited to these. For example, after inserting the ends of the solar cells 20, 120, and 220 into the grooves of the pair of supports 31, 131, and 231 and the third supports 32, 132, and 232, a frame for fixing the ends of the solar cells 20, 120, and 220 may be detachably attached to the soundproof panels 12, 112, and 212.

[0057] The frame may fix all of the open ends of the solar cell that are not inserted into the grooves of the support, or it may fix only a portion of the open ends. One frame or multiple frames may be used for one solar cell. The frame may have a shape that includes grooves for accommodating the ends of the solar cells, or it may be a plate shape that presses and fixes the ends of the solar cells to the soundproof panel.

[0058] Figures 11-13 are schematic plan views illustrating an example in which a frame is used as a fixing member in the first embodiment described above. In the first embodiment, it is preferable to fix at least the lower end of the solar cell 20 using a frame. Figure 11 shows an example in which all ends of the solar cell 20 except the lower end are inserted into the grooves of the support members 31, 31, and 32, and the lower end (open end) is fixed with a straight frame 71. Figures 12 and 13 show an example in which, of the ends around the entire circumference of the solar cell 20, the lower part of the ends parallel to the vertical direction and the lower end are open ends, and the other ends are inserted into the grooves of the supports 31, 31, and 32. As shown in Figure 12, only the lower end of the open ends may be fixed with a straight frame 72, or as shown in Figure 13, the lower part of the ends parallel to the vertical direction and the lower end may be fixed using a U-shaped frame 73. The U-shaped frame 73 may be a single piece or may be divided into multiple pieces.

[0059] Figures 14 and 15 are schematic plan views illustrating an example in which a frame is used as a fixing member in the third embodiment described above. In the third embodiment, it is preferable to fix at least the upper end of the solar cell 220 using a frame. Figures 14 and 15 show an example in which, of the ends of the solar cell 220 around its entire circumference, the upper part of the ends parallel to the vertical direction and the upper end are open ends, and the other ends are inserted into the grooves of the supports 231, 231, and 232. As shown in Figure 14, only the upper end of the open ends may be fixed with a straight frame 74, or as shown in Figure 15, the upper part of the ends parallel to the vertical direction and the upper end may be fixed using a U-shaped frame 75. The U-shaped frame 75 may be a single piece or may be divided into multiple pieces.

[0060] <<Variation 3>> As in the above embodiment, if the solar cell 20 has a holding plate 21 and a power generation unit 23, and there are strip-shaped non-overlapping portions 21a, 21b, and 21c at both ends in the horizontal and vertical directions of the holding plate 21 where the power generation unit 23 is not present, the groove formed between the support 39 and the soundproof panel 12 may have a first groove 33 that accommodates the non-overlapping portion 21a and a second groove 34 that covers the end of the power generation unit 23, as illustrated in Figure 16. The support 39 in this example consists of a first flat plate portion 41 that is in close contact with the back surface of the soundproof panel 12, a second flat plate portion 42 that is spaced at a certain distance from the back surface of the soundproof panel 12 and forms a first groove portion 33, a stepped portion 43 at the boundary between the first flat plate portion 41 and the second flat plate portion 42, and a third flat plate portion 49 that extends diagonally from the second flat plate portion 42. The distance between the third flat plate portion 49 and the back surface of the soundproof panel 12 gradually increases in the direction away from the second flat plate portion 42, that is, inward towards the power generation portion 23. The third flat plate portion 49 forms a second groove portion 34 between itself and the soundproof panel 12. With the non-overlapping portion 21a housed and supported in the first groove portion 33, the second groove portion 34 houses the end of the power generation unit 23, and the third flat plate portion 49 is spaced apart from the power generation unit 23 and covers the end of the power generation unit 23.

[0061] The width W9 of the third flat plate portion 49 in the width direction of the non-overlapping portion 21a should be large enough to cover at least the edge of the power generation portion 23. For example, 5 to 30 mm is preferred, and 5 to 10 mm is more preferred. The maximum value H9 of the distance between the third flat plate portion 49 and the back surface of the soundproof panel 12 should be set such that if it is too small, it will interfere with the edge of the power generation unit 23, and if it is too large, sunlight and rain will easily hit the edge of the power generation unit 23 directly. In this example, the end of the power generation section 23 is housed in the second groove 34 and covered by the third flat plate section 49, which prevents direct exposure to sunlight and rain, the main causes of deterioration and degradation, thus improving the weather resistance of the end of the power generation section 23. If the retaining plate 21 and the power generation section 23 are integrated with adhesive, the improved weather resistance makes it less likely for the edge of the power generation section 23 to peel off from the retaining plate 21.

[0062] In the first, second, and third embodiments, it is preferable that the pair of supports 31, 131, 231 and the third supports 32, 132, 232 have a second groove as illustrated in Figure 16. Furthermore, if a frame is provided to fix the ends of the solar cells 20, 120, and 220 after inserting the ends of the solar cells 20, 120, and 220 into the grooves of the pair of supports 31, 131, and 231 and the third supports 32, 132, and 232, it is preferable that the frame also has a second groove that accommodates the ends of the power generation unit 23, as illustrated in Figure 16. By covering the edges of the power generation unit 23 on all four sides, the weather resistance can be further improved.

[0063] ≪Fourth Embodiment≫ The main differences between this embodiment and the first embodiment are that the solar cell includes an integrated member 83 that integrates the holding plate 21 and the power generation unit 23, and that the soundproof panel 12 has a groove 81 on the solar cell side that is parallel to the insertion direction of the end of the solar cell. Figures 17 and 18 are diagrams illustrating an example of the main part of a soundproof wall with solar cells to illustrate the points mentioned above. Figure 17 shows the state before the solar cells are installed, and Figure 18 shows the state after the solar cells are installed. Figures 17(B) and 18(B) are plan views, Figure 17(A) is a cross-sectional view along line aa in Figure 17(B), and 18(A) is a cross-sectional view along line aa in Figure 18(B). Figure 19 is an enlarged cross-sectional view of a part of Figure 18(A).

[0064] In this example, the solar cell does not use adhesive to integrate the holding plate 21 and the power generation unit 23, but instead uses an integrating member 83. As shown in Figure 19, the integrated member 83 has a through portion 83a that penetrates the retaining plate 21 and the power generation unit 23, and a protruding portion 83b that protrudes from the side of the retaining plate 21 opposite to the power generation unit 23. The end of the integrated member 83 opposite to the protruding portion 83b may also protrude from the power generation unit 23. For example, a rivet or the like can be used as the integrated member 83. In a solar cell, the integrated member 83 is provided in an area that does not contribute to power generation. In this example, a sealing portion 23a exists at the peripheral edge of the power generation section 23, and the integrated member 83 is provided on this sealing portion 23a. Specifically, multiple integrated members 83 are provided at intervals along the insertion direction on the sealing portions 23a at both ends in the horizontal direction of the power generation section 23. In addition, an integrated member 83 is provided in the center of the sealing portions 23a at both ends in the vertical direction of the power generation section 23.

[0065] As shown in Figures 17 and 18, in this example, the solar cell side of the soundproof panel 12 is provided with three grooves 81 parallel to the insertion direction of the end of the solar cell. Two of the grooves 81 are positioned to overlap with the sealing portions 23a at both horizontal ends of the power generation unit 23 in a plan view when the solar cell is attached to the soundproof panel 12. The remaining groove 81 is positioned to intersect with the sealing portions 23a at both vertical ends of the power generation unit 23 in a plan view at the center of the sealing portion 23a in the horizontal direction. That is, as shown in Figures 18 and 19, when the solar cell is attached to the soundproof panel 12, the protruding portion 83b of the integrating member 83 that integrates the holding plate 21 and the power generation unit 23 is accommodated in the groove 81. Since the groove 81 extends parallel to the insertion direction of the end of the solar cell, when the solar cell is attached to the soundproof panel 12 by sliding it vertically, the protruding portion 83b of the integrated member 83 moves inside the groove 81.

[0066] Furthermore, in this example, the mounting members (bolts 16) for fixing the soundproof panel 12 to the frame material (e.g., connecting member 13) for attaching the soundproof panel 12 to the soundproof wall are housed within the grooves 81. In the first embodiment, the bolts 16 protrude from the soundproof panel 12 toward the solar cell, so the bolts 16 were provided in a space where there are no solar cells. However, with the configuration of this example, the mounting members (bolts 16) can be provided in the area where the solar cells are present.

[0067] According to this embodiment, the retaining plate 21 and the power generation unit 23 can be integrated with the integrating member 83, making it less likely for the retaining plate 21 and the power generation unit 23 to separate. Furthermore, the degree of freedom in the placement of mounting members (bolts 16) for attaching the soundproofing panel 12 to the soundproofing wall is improved. In addition to the grooves 81, recesses for accommodating the bolts 16 may be provided in the area on the soundproofing panel 12 where the solar cells are located. However, by configuring the grooves 81 to accommodate the protruding portion 83b of the integrated member 83 and the bolts 16, the proportion of the flat area of ​​the soundproofing panel 12 can be increased. A larger flat area increases the area where the solar cells and the soundproofing panel are in close proximity, thereby improving stability against wind pressure. Furthermore, by providing the grooves 81 on the soundproofing panel 12, the rigidity of the soundproofing panel 12 is increased, which is another advantage.

[0068] In this embodiment, configurations other than those described above can be the same as those in the first embodiment. A modified configuration may also be adopted. Furthermore, in the second and third embodiments and their variations, the same effects as in this embodiment can be obtained by providing grooves parallel to the insertion direction of the ends of the solar cells. [Explanation of symbols]

[0069] 11, 111, 211 Soundproof walls 12, 112, 212 soundproof panels 13 Connecting member 14, 114 pillars 15 Basics 16 bolts (mounting components) 17, 217 Blank area 20, 120, 220 solar cells 21, 121, 221 Holding plate 21a, 21b, 21c, 121a, 121b, 121c Non-overlapping area 23, 123, 223 Power Generation Department 23a Sealing part 24 Junction Box 25 Cables 26 Power Conditioner 31, 131, 231 Pair of support structures 32, 132, 232 Third support 33. First groove 34 Second groove 39 Support 41 1st flat plate part 42 2nd flat plate part 43 Step part 44 rivets 49 3rd flat plate part 50 holes 51. Nut (fixing component) 52 Bolts (fixing members) 61 First flat plate-shaped member 62 Second flat plate member Frames 71, 72, 73, 74, 75 81 Concave line 83 Integrated component 83a Penetration 83b Protrusion 114a Flange inner surface

Claims

1. A soundproof wall equipped with soundproofing panels, A flexible, flat solar cell located on one side of the soundproof panel, The solar cell has a pair of supports that support each of the opposing ends of the solar cell, The pair of supports have grooves for accommodating the ends of the solar cells, The ends of the solar cell are housed in the groove, Soundproof wall with solar cells, wherein the groove portion is formed so that the end of the solar cell can be inserted from below vertically, above vertically, or horizontally.

2. Furthermore, the soundproof wall with a solar cell according to claim 1, further comprising a third support that supports one end of the solar cell different from the pair of opposing ends.

3. The soundproof wall with a solar cell according to claim 1, wherein the solar cell comprises a flexible holding plate and a power generation unit located on one surface of the holding plate.

4. At the end of the solar cell, there is a non-overlapping portion where the edge of the power generation portion is located inward from the edge of the retaining plate and the power generation portion does not exist on the retaining plate. The soundproof wall with solar cells according to claim 3, wherein the groove portion comprises a first groove portion that accommodates and supports the non-overlapping portion and a second groove portion that accommodates the end portion of the power generation portion spaced apart from the power generation portion.

5. The soundproof wall with solar cells according to claim 4, wherein in the second groove, the distance from the power generation unit to the support increases toward the inward direction of the power generation unit.

6. The solar cell comprises an integrated member that integrates the holding plate and the power generation unit, The integrated member has a through portion that penetrates the retaining plate and the power generation unit, and a protruding portion that protrudes from the side of the retaining plate opposite to the power generation unit side. On the surface of the soundproof panel facing the solar cell, there is a groove parallel to the insertion direction of the end of the solar cell. The soundproof wall with solar cells according to claim 3, wherein the protruding portion of the integrated member is housed in the groove.

7. The soundproof wall with solar cells according to claim 6, wherein there is a mounting member for attaching the soundproof panel to the soundproof wall, and the mounting member is housed in the recess.

8. The soundproof wall with solar cells according to claim 1, wherein there is a fixing member for detachably fixing the solar cells to the soundproof panel.

9. The soundproof wall with solar cells according to claim 8, wherein the fixing member has a bolt that penetrates the solar cell.

10. The soundproof wall with solar cells according to claim 8, wherein the fixing member has a frame for fixing the end of the solar cell.

11. The soundproof wall with a solar cell according to any one of claims 1 to 10, wherein the solar cell has a power generation section containing a perovskite compound.

12. A soundproof wall equipped with soundproofing panels, A flat solar cell located on one side of the aforementioned soundproof panel, The solar cell has a pair of supports that support each of the opposing ends of the solar cell, The pair of supports have grooves for accommodating the ends of the solar cells, The aforementioned solar cell has a power generation section containing a perovskite compound, Soundproof wall with solar cells, wherein the groove portion is formed so that the end of the solar cell can be inserted from below vertically, above vertically, or horizontally.

13. A method for attaching a flexible, flat solar cell to a soundproof wall equipped with soundproofing panels, On one surface of the soundproof panel, a pair of supports are provided, each having a groove for accommodating a pair of opposing ends of the solar cell. A method for mounting a solar cell, comprising bending the solar cell while inserting the pair of ends into the groove from vertically below, vertically above, or horizontally.

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