JP7299677B2 - Floating body device and photovoltaic power generation system using the floating body device - Google Patents

Description

The present invention relates to a floating body device and a solar power generation system using the floating body device.

In recent years, the construction of floating solar power generation systems in which solar power generation facilities are installed on the surface of water such as lakes and ponds is expanding. A typical floating solar power generation system includes a floating structure in which a plurality of floating bodies are connected. Each floating body is equipped with one or more photovoltaic panels. By mounting a large number of photovoltaic panels on a water structure, a floating photovoltaic system is constructed.

Floating photovoltaic systems are held in place on the surface of the water by mooring lines. One end of the mooring line is connected to the floating structure and the other end is connected to a stake or anchor. A floating solar power generation system is moored by fixing piles or anchors to the bottom of the water or on land. Patent Literature 1 shows an example of a mooring structure for a floating photovoltaic power generation system.

Utility Model Registration No. 3195654

A floating photovoltaic power generation system mounts many photovoltaic power generation panels on a water float, which is an integral floating structure formed by connecting a plurality of floating bodies. The light-receiving surface of the photovoltaic panel is oriented in the direction in which sunlight is incident in order to increase the amount of power generation. Therefore, the photovoltaic panel is installed in an inclined state on the floating body. For example, in Japan, photovoltaic panels are generally installed with the light-receiving surface of the photovoltaic panel inclined downward toward the south. The tilted photovoltaic panel is susceptible to wind on the light-receiving surface and the back surface. Therefore, a large load is applied to the photovoltaic panel by wind pressure. As a result, the photovoltaic power generation system moves on the water surface due to the component in the direction along the water surface of the wind pressure load. To limit its movement, mooring lines moor the photovoltaic system to the bottom of the water or on land, thus keeping the photovoltaic system in place in the water surface. Such a photovoltaic power generation system is disclosed, for example, in Japanese Utility Model Registration No. 3195654 (Patent Document 1).

The float fixing member described in Patent Document 1 has a fixing hook. Anchor anchors are connected to fixed hooks via ropes or wires that are stretched over the land, and the solar cell panel water installation base is moored. Moreover, FIG. 5 of Patent Document 1 shows a configuration in which six solar cell panel floating mounting bases are connected to each other and wires are connected to two fixed hooks.

As the scale of the photovoltaic power generation system increases, the number of the solar cell panel water installation bases handled by one mooring cable increases. As a result, the load on each mooring line becomes very large. Also, the direction in which the photovoltaic power generation system moves on the water surface changes according to the change in wind direction. Therefore, even if the number of fixed hooks and the number of ropes over the photovoltaic power generation system are increased, the load is not necessarily evenly distributed among them. Therefore, in order to improve the durability of the mooring structure, it is necessary to increase the strength of each fixed hook.

Therefore, in Patent Document 1, it is conceivable to increase the strength by enlarging the fixing hook. However, increasing the size of the fixed hook increases the weight. As a result, workability deteriorates when assembling and installing the floating solar panel installation base.

As another example, it is conceivable to wind the wire directly around the float member of the solar cell panel floating installation platform. However, if the wire is directly wound around the float member, the outer shell of the float member rubs against the wire, or the load applied from the wire deforms the float member. The float member requires buoyancy to float the solar cell panel water installation base on the water surface. Therefore, a lightweight member such as a resin or thin metal plate is mainly used for the float member. However, such lightweight members are vulnerable to rubbing against other members and being subjected to heavy loads. Therefore, the float member may be damaged and submerged.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and provides a floating device with improved strength while suppressing an increase in the weight of the mooring structure, and a photovoltaic power generation system in which a photovoltaic panel is mounted on the floating device. intended to

In a floating body device according to at least one embodiment of the present invention, a floating body for mounting a photovoltaic panel is connected to the floating body at two different locations, and a restricting portion is provided between the two locations connected to the floating body, It has a fixed member at least part of which extends along the floating body is cylindrical, and a mooring cable whose one end side is wound around the fixed member and whose other end side is fixed to the ground or the bottom of the water. The part restricts movement of the one end side of the mooring cable along the fixing member.

According to at least one embodiment of the present invention, in a floating body device and a photovoltaic power generation system using the floating body device, it is possible to improve the strength of the mooring structure while suppressing an increase in the weight of the structure mooring them. .

1 is a perspective view of a photovoltaic power generation system according to a first embodiment; FIG. 1 is a perspective view of a floating body device according to a first embodiment; FIG. It is an exploded perspective view of a floating body device in a 1st embodiment. It is a figure which shows the fixing member in 1st Embodiment. (a) and (b) are perspective views from different directions, and (c) is a sectional view taken along line IV-IV. It is a top view of a fixing member in a 1st embodiment. 1 is a top view of a photovoltaic power generation system according to a first embodiment; FIG. It is a perspective view of the photovoltaic power generation system in 2nd Embodiment. It is a perspective view of the floating body device in 2nd Embodiment. FIG. 5 is a perspective view of an auxiliary floating body in the second embodiment; (a) shows the first auxiliary floating body, and (b) shows the second auxiliary floating body. It is a top view of the photovoltaic power generation system in 2nd Embodiment. It is a sectional view of a fixing member in a 3rd embodiment. It is a perspective view of the fixing member in 4th Embodiment. It is a figure which shows the fixing member in 5th Embodiment. (a) and (b) are perspective views from different viewpoints, and (c) is a sectional view taken along line XII-XII. It is a side view of the fixing member in 5th Embodiment. It is a figure which shows the fixing member in 6th Embodiment. (a) and (b) are perspective views from different viewpoints, and (c) is a sectional view taken along line XIV-XIV. FIG. 21 is a top view of a fixing member in the sixth embodiment; It is a figure which shows the fixing member in 7th Embodiment. (a) and (b) are perspective views from different viewpoints, and (c) is a sectional view taken along line XVI-XVI. It is a side view of the fixing member in 7th Embodiment. It is a figure which shows the fixing member in 8th Embodiment. (a) and (b) are perspective views from different viewpoints, and (c) is a sectional view taken along line XVIII-XVIII. It is a figure which shows the fixing member in 9th Embodiment. (a) and (b) are perspective views from different viewpoints, and (c) is a sectional view taken along line XIX-XIX.

Several embodiments of the present invention will now be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely examples.

(First embodiment)
A first embodiment of the present invention will be described below. FIG. 1 is a perspective view showing a photovoltaic power generation system 10 of this embodiment. FIG. 2 is a perspective view showing the floating body device 20 of this embodiment. The solar power generation system 10 has a solar power generation panel 11 mounted on a floating device 20 . A floating body device 20 of this embodiment has a floating body 21 , a connecting member 50 , a fixing member 30 and a mooring cable 40 .

When viewed from above, the floating body 21 has a substantially rectangular area, in which the photovoltaic panel 11 can be mounted. The floating body 21 has a structure in which the inside of the shell is hollow or a structure in which the inside of the shell is filled with foam. Due to such an internal structure, the floating body 21 has a buoyancy that allows it to float on the water surface with the photovoltaic panel 11 placed thereon. Metal, resin, or the like can be used as the material of the outer shell of the floating body 21 . A material that is lightweight and resistant to corrosion is suitable for the outer shell of the floating body 21, and for example, a resin material such as plastic can be used. Since the outer shell of the floating body 21 made of a resin material has elasticity, the floating body 21 is resistant to impacts such as collisions with drifting objects. In addition, since the photovoltaic power generation system 10 is installed outdoors, the material of the outer shell of the floating body 21 is preferably a weather-resistant resin that is highly resistant to ultraviolet rays.

The photovoltaic panel 11 is fixed on the floating body 21 in an inclined state. By inclining the photovoltaic panel 11 and directing the light-receiving surface in the direction in which sunlight is incident, the amount of power generation can be increased. In this embodiment, the upper surface of the floating body 21 is an inclined surface, and the structure which mounts the photovoltaic power generation panel 11 on it is illustrated. Alternatively, a frame may be constructed on the floating body 21 with rails, supports, or the like, and the photovoltaic panel 11 may be tilted on the frame.

FIG. 3 is an exploded perspective view of the floating body device 20 of this embodiment. As shown in FIG. 3, the floating body 21 has plate-shaped ears 22 protruding from side surfaces at four corners. The ears 22 are formed with a thickness greater than the thickness of the outer shell in order to increase strength. A through hole 23 penetrates the ear portion 22 in a direction intersecting the horizontal plane. The through-holes 23 communicate with each other, and the ears 22 of the adjacent floating bodies 21 are overlapped. Then, the connecting member 50 is inserted through the communicating through hole 23 . Adjacent floating bodies 21 are connected as described above. Although three adjacent floating bodies 21 are connected in FIG. 3, the number of connected floating bodies 21 may be two or four or more.

The connecting member 50 includes a connecting member male side 51 , a connecting member female side 52 and a protective pipe 53 . In this embodiment, a bolt 51 is provided on the male side of the connecting member and a nut 52 is provided on the female side of the connecting member. The protection pipe 53 is a tubular member for protecting the shaft of the bolt 51 . The bolt 51 is inserted through the through hole 23 with the protective pipe 53 arranged around the shaft. By fastening a nut 52 to the tip of the shaft of the bolt 51, the ear portions 22 are connected to each other. The bolt 51, nut 52 and protection pipe 53 may be made of metal or plastic resin.

As shown in FIGS. 2 and 3, securing member 30 is attached to two ears 22 . Further, in this embodiment, the fixing member 30 has a structure in which both ends thereof extend toward the floating body 21 side. Two end portions to which both end portions are extended have through holes 33 respectively. Both ends of the fixing member 30 have a first connection portion 31 and a second connection portion 32, respectively. The fixing member 30 is connected to the floating body 21 at two points, a first connection portion 31 and a second connection portion 32 . The fixing member 30 has a prism-shaped portion between the first connection portion 31 and the second connection portion 32 . The fixing member 30 is connected to the floating body 21 so that the longitudinal direction of the prismatic portion extends along the floating body 21 .

Although the fixed member 30, the first connection portion 31 and the second connection portion 32 of the present invention are shown as an integral structure, they may be separate members. For example, separate first connection portions 31 and second connection portions 32 may be fixed to both ends of the fixing member 30 by welding, screws, or the like. Also, the first connecting portion 31 and the second connecting portion 32 may not have a shape in which both ends of the fixing member 30 are bent as long as they have a structure to be attached to the ear portion 22 .

The first connection portion 31 and the second connection portion 32 extend from the side surface of the fixed member 30 toward the floating body 21 . Therefore, the distance between the fixed member 30 and the floating body 21 can be increased. Therefore, the mooring cable 40 (described later) connected to the fixing member 30 is less likely to come into contact with the floating body 21 , thereby suppressing damage to the floating body 21 .

FIG. 4 is a diagram showing the fixing member 30 of this embodiment. 4(a) and 4(b) are perspective views from different viewpoints. FIG. 4(c) is a cross-sectional view taken along line IV-IV in FIG. 4(b). The fixing member 30 is a tubular member having a rectangular cross section. The fixing member 30 has a first connection portion 31 and a second connection portion 32 at both ends thereof. A point equidistant from the first connecting portion 31 and the second connecting portion 32 in the prismatic portion of the fixing member 30 is the center of the fixing member 30 in the longitudinal direction. The fixing member 30 has recesses on the side surfaces in the central area including the center. That is, the fixing member 30 has a partially reduced cross-sectional area in the central region. Then, one end side of a mooring cable 40 , which will be described later, is wound around the central region of the fixing member 30 . In this embodiment, the fixing member 30 has a recess on one of its outer peripheral side surfaces.

The mooring cable 40 is a rope-like member for connecting the photovoltaic power generation system 10 to the ground or the bottom of the water. One end of the mooring cable 40 is wound around a recess provided on the side surface of the central region of the fixing member 30 to connect the mooring cable 40 and the fixing member 30 . The other end of the mooring cable 40 is connected and fixed to a mooring pile 41 such as an anchor or a pile fixed to the bottom of the water. If the position where the photovoltaic power generation system 10 is installed is close to the shore, anchors and piles may be placed on land. In this way, the mooring structure including the mooring ropes 40 and the fixing members 30 described above suppresses movement of the solar power generation system 10 under wind pressure on the water surface, and the solar power generation system 10 is held at a predetermined position on the water surface. be detained.

FIG. 5 is a top view of the fixing member 30 of this embodiment. The restriction part 36 restricts movement of the one end side of the mooring cable 40 along the longitudinal direction of the fixing member 30 along the floating body 21 . Here, the restricting portion 36 is a step between both ends of a recess provided on the outer peripheral side surface of the fixing member 30 . Of the restricting portion 36 , the step on the first connecting portion 31 side is the first restricting portion 37 , and the step on the second connecting portion 32 side is the second restricting portion 38 .

The photovoltaic power generation system 10 moves along the floating body 21 including the longitudinal component in which the fixing member 30 extends. Then, when the mooring cable 40 is pulled, one end side of the mooring cable 40 moves along the longitudinal direction of the fixing member 30 . However, the movement of the mooring cable 40 is blocked by the first restricting part 37 and the second restricting part 38 , and the position where the mooring cable 40 is wound around the fixing member 30 is kept within the central area of the fixing member 30 . On the one end side of the mooring cable 40 , the circumference of the portion wound around the fixing member 30 is preferably close to the circumference of the outer edge of the fixing member 30 and shorter than the circumference of the outer edge of the restricting portion 36 . This makes it difficult for the mooring cable 40 to come off the region between the first restricting portion 37 and the second restricting portion 38 .

Temporarily, if the restriction part 36 were not provided, the one end side of the mooring cable 40 would move along the longitudinal direction of the fixing member 30 to the vicinity of the first connection part 31 or the second connection part 32 . In this state, the load is unevenly applied to the connecting portion on the side closer to the mooring cable 40, and the fixing member 30 and the floating body 21 may be damaged. Also, if one end of the mooring cable 40 approaches the end of the fixing member 30 and the mooring cable 40 and the floating body 21 approach each other, there is a risk that they will rub against each other and the outer shell of the floating body 21 will be damaged. However, in the photovoltaic power generation system 10 of the present embodiment, the connection position between the mooring cable 40 and the fixing member 30 is maintained within the central region in the longitudinal direction of the fixing member 30 by the restricting portion 36 , so that the first connection It is possible to suppress biasing of the load applied to the portion 31 and the second connection portion 32 to either one. Moreover, the friction between the members mentioned above can also be suppressed. Therefore, the durability of the mooring structure of the photovoltaic power generation system 10 installed on water is improved.

Also, the fixation member 30 of FIG. 4 is mostly a hollow tubular or cylindrical structure. The structure allows the securing member 30 to be of equal strength with less weight than if the securing member 30 were a solid member.

By the way, when the photovoltaic power generation system 10 moves along the water surface and a load is applied to the fixing member 30 at the position where the one end side of the mooring cable 40 is wound, the inner side surface of the fixing member 30 at that position becomes the load point. becomes. Due to the load, a force (bending stress) is applied to bend the fixing member 30 .

The allowable bending stress σ′ is determined according to the material used for the fixing member 30 . The allowable bending stress σ' is the maximum value of stress that is considered safe when using a member made of a specific material. Therefore, in the photovoltaic power generation system 10 of the present invention, the fixing member 30 is designed so that σ′>σ with respect to the bending stress σ that is expected to occur in the fixing member 30 . The smaller the bending stress σ of the fixing member 30, the greater the strength thereof, and the fixing member 30 can withstand a large load. The section modulus Z and the bending moment M determine the bending stress σ, and σ=M/Z. The bending moment M is determined by the distance from the calculation point of the bending moment M to the load point and the magnitude of the load applied to the load point. Therefore, if the fixed member 30 has the same outer shape except for the cross section and the same load is applied, the bending moment M is the same regardless of whether the fixed member 30 has a solid or hollow cross section. Specifically, the length of the prism portion extending along the floating body 21 of the fixing member 30, that is, the length of the fixing member 30 in the longitudinal direction may be the same. Therefore, in order to compare the size of the load that can be withstood between the fixing members 30 having the same outer shape other than the cross section, it is sufficient to compare the section modulus Z of each. As the section modulus Z of the fixing member 30 increases, the bending stress σ decreases and the fixing member 30 can withstand a large load.

The formula for calculating the section modulus Z is determined by the cross-sectional shape. As shown in FIG. 4(c), when the fixing member 30 is attached to the floating body 21, the cross-sectional shape in the direction intersecting the direction extending along the floating body 21 is square. The case where the fixing member 30 is assumed to be a solid member with an outer shape as shown in FIG. 4(a) is compared with the case where the fixing member 30 is a hollow member shown in FIG. 4(c). Since the photovoltaic power generation system 10 moves along the water surface, the main load is applied to the fixing member 30 in the horizontal direction, and the main load is applied in the right direction in FIG. 4(c).

As shown in FIG. 4(c), let a be the length of one side of the square section of the fixing member 30 at the position where the one end side of the mooring cable 40 is wound. Assuming that the square section of the fixing member 30 is solid, the section modulus Z ₀ =a ³ /6. At this time, the area occupied by the material in the cross section is S ₀ =a ² . On the other hand, when the square section of the fixing member 30 is hollow, as shown in FIG. 4(c), the _section modulus Z ₁ =(a ⁴ −a ₁ ⁴ )/6a, and the area occupied by the material in this section is S1=a ² −a ₁ ² . If the fixing member 30 has the same length in the direction along the floating body 21 and is made of the same material, the weight of the fixing member 30 is proportional to the area occupied by the material in its cross section. Therefore, when comparing the weight between the solid case and the hollow case, the size of the cross-sectional area occupied by the material should be compared.

Here, assuming that the length of one side of the square section of the fixing member 30 is a=40 cm and the thickness of the side surface of the fixing member 30 at the position where one end side of the mooring cable 40 is wound is t=1 cm, the length of one side of the hollow region is Length a ₁ =38 cm. In this case, in the solid case, the section modulus Z ₀ =approximately 10667 cm ³ and the area occupied by the material S ₀ =1600 cm ² . If this is hollow, the section modulus Z ₁ =approximately 1979 cm ³ and the area occupied by the material S ₁ =approximately 156 cm ² . For these, comparing the ratio of the weight required to achieve the same strength using the numerical value obtained by dividing the area occupied by the material by the section modulus, when the fixing member 30 is solid, S ₀ /Z ₀ =approximately 0.149, in the hollow case S ₁ /Z ₁ =approximately 0.079. Therefore, the weight required to realize the fixing member 30 with the same strength is smaller in the hollow structure, and the fixing member 30 with the same strength can be realized with less weight than the solid structure.

Also, if the hollow member and the solid member have the same section modulus, the strength will be the same. Here, assuming that the section modulus of the hollow member is Z ₁ =about 10667 cm ³ , which is the same value as the solid member described above, the fixing member 30 at the position where the one end side of the mooring cable 40 is wound Assuming a side thickness t=1 cm, the area occupied by the material in the cross section is S ₁ =approximately 359 cm ² . As mentioned above, for a solid member of the same strength, the area occupied by the material in cross section is S ₀ =1600 cm ² , so S ₁ /S ₀ =359/1600=approximately 0.22. Therefore, the hollow member can achieve the same strength of the fixing member 30 with approximately 22% less weight than the solid member.

By forming the fixing member 30 into a hollow cylindrical shape in this way, it is possible to achieve the same strength with a smaller weight than a solid structure. However, the fixing member 30 as a whole does not necessarily have to be cylindrical, and if even a part of the fixing member 30 has a cylindrical hollow structure, the effect described above can be obtained in that part. By forming at least part of the fixing member 30 into a cylindrical hollow structure, the weight of the fixing member 30 can be reduced while maintaining strength. As a result, in the photovoltaic power generation system 10, the lowering of the water line of the floating body 21 on the side to which the fixing member 30 is connected is suppressed, and the photovoltaic power generation panel 11 is less likely to be splashed with water. In addition, in the solar power generation system 10, it is possible to prevent the floating body 21 from tilting due to the weight of the fixing member 30 and the tilt angle of the solar power generation panel 11 from becoming an unexpected angle. It is possible to reduce the deviation from the power generation amount of

In addition, in the present embodiment, the larger the steps of the first restricting portion 37 and the second restricting portion 38 , the more difficult it is for the mooring cable 40 to climb over the first restricting portion 37 or the second restricting portion 38 . In addition, the steep angle of the steps at the first restricting portion 37 and the second restricting portion 38 makes it difficult for the mooring cable 40 to climb over the first restricting portion 37 or the second restricting portion 38 . That is, it is preferable that the shape of the step is closer to a stepped shape.

Further, a steel material, an aluminum alloy, or the like can be used for the fixing member 30 . Since the photovoltaic power generation system 10 is installed on water, it is preferable that the surface of the fixing member 30 is subjected to antirust treatment. For example, the surface of steel materials can be coated with a rust-resistant metal such as zinc, the surface of an aluminum alloy can be oxidized by alumite treatment, or the surface can be coated with an anti-corrosion coating.

Also, a stainless alloy may be used for the fixing member 30 . When the fixing member 30 is made of a stainless alloy, it is not necessary to provide a protective film such as painting, plating, or oxide coating on the surface of the fixing member 30 because the material itself has high corrosion resistance. Therefore, the friction between the fixing member 30 and the mooring cable 40 does not deteriorate the surface protection film of the fixing member 30 and cause rust.

A cross rope made of natural fibers or synthetic fibers, a wire rope made of metal, or the like can be used as the mooring rope 40 . A large number of solar power generation panels 11 that are easily affected by wind are installed in the solar power generation system 10 . Therefore, the wind pressure load applied to the entire photovoltaic power generation system 10 becomes very large. Therefore, it is preferable to use a highly durable metal wire rope for the mooring rope 40 so that the mooring rope 40 can withstand a large load due to wind pressure.

FIG. 6 is a top view showing the photovoltaic power generation system 10 of this embodiment. The solar power generation system 10 has a solar power generation panel 11 mounted on a floating device 20 . Also, the photovoltaic power generation system 10 has nine floating bodies 21 and six fixing members 30 .

In the photovoltaic power generation system 10 shown in FIG. 6, the photovoltaic power generation panel 11 is mounted on an integrated floating structure in which nine floating bodies 21 are connected in a 3-row, 3-column arrangement. Also, a total of six fixing members 30 are attached to a plurality of ears 22 on the outer periphery of the photovoltaic power generation system 10 . The connecting member 50 connects the first connecting portion 31 and the second connecting portion 32 of the fixing member 30 to different ear portions 22 . One end of the mooring cable 40 is wound around and connected to the fixing member 30, and the other end of the mooring cable 40 is connected to the mooring pile 41 fixed to the bottom of the water.

In this way, the plurality of fixing members 30 connected to the mooring piles 41 via the mooring ropes 40 restrain the photovoltaic power generation system 10 from moving on the water surface. The photovoltaic system 10 is thereby held in place. In the longitudinal direction of the fixing member 30 , which is the direction in which the fixing member 30 extends along the floating body 21 , the restricting portion 36 keeps the connection position of the mooring cable 40 within the central region of the fixing member 30 in the longitudinal direction. As a result, it is possible to prevent the load from being unevenly applied to either one of the first connection portion 31 and the second connection portion 32, thereby improving the durability of the mooring structure of the photovoltaic power generation system 10. FIG.

By the way, the fixing member 30 is attached to the outer peripheral edge of the floating device 20 . Therefore, as the scale of the photovoltaic power generation system 10 increases, the number of floating bodies 21 handled by each fixing member 30 increases, and the load applied to each fixing member 30 increases. Here, in order to maintain the strength of the mooring structure, it is necessary to increase the number of fixing members 30 , which increases the weight of the photovoltaic power generation system 10 . In addition, as the scale of the solar power generation system 10 increases, the weight of accessory parts (not shown) of the solar power generation system 10 such as electrical wiring connecting the solar power generation panels 11 increases. Therefore, the total weight of the photovoltaic power generation system 10 becomes very large, and the buoyancy of the floating body device 20 supporting the photovoltaic power generation system 10 may be insufficient.

However, as shown in FIG. 4, the fixing member 30 of this embodiment is a cylindrical member having a prismatic outer shape and a hollow interior. Therefore, it is possible to increase the strength of the structure for mooring the photovoltaic power generation system 10 while suppressing an increase in weight due to an increase in the number of fixing members 30 .

(Second embodiment)
A second embodiment of the present invention will be described below. FIG. 7 is a perspective view showing the photovoltaic power generation system 10 of this embodiment. FIG. 8 is a perspective view showing the floating body device 20 of this embodiment. FIG. 9(a) is a perspective view of the first auxiliary floating body 60. FIG. 9(b) is a perspective view of the second auxiliary floating body 61. FIG.

In the photovoltaic power generation system 10 of this embodiment, a plurality of floating bodies 21 on which the photovoltaic power generation panels 11 are mounted are connected. Further, in the photovoltaic power generation system 10 of the present embodiment, auxiliary floating bodies are arranged between the plurality of floating bodies 21, and the floating bodies 21 are connected to each other via the auxiliary floating bodies. As shown in FIGS. 7 and 8, auxiliary floating bodies having different dimensions are connected to the long sides and short sides of the floating body 21, respectively. The first auxiliary floating body 60 is connected to the long side of the floating body 21 , and the second auxiliary floating body 61 is connected to the short side of the floating body 21 .

Like the floating body 21, the first auxiliary floating body 60 and the second auxiliary floating body 61 have a structure in which the inside of the outer shell is hollow or a structure in which the inside of the outer shell is filled with foam. As shown in FIG. 9, the first auxiliary floating body 60 and the second auxiliary floating body 61 have plate-shaped ears 62 protruding from side surfaces at four corners. The ears 62 are formed with a thickness greater than the thickness of the outer shell in order to increase strength. A through hole 63 penetrates the ear portion 62 in a direction intersecting the horizontal plane. As shown in FIG. 7, the ear portion 22 of the floating body 21 and the ear portion 62 of the first auxiliary floating body 60 or the second auxiliary floating body 61 are overlapped with the through holes 23 and 63 communicating with each other. Then, the connecting member 50 is inserted through the through hole 23 and the through hole 63 . Thus, the connecting member 50 connects the floating body 21 and the first auxiliary floating body 60 or the second auxiliary floating body 61 .

The photovoltaic power generation system 10 may include only one of the first auxiliary floating body 60 and the second auxiliary floating body 61 . In the photovoltaic power generation system 10 , the first auxiliary floating body 60 or the second auxiliary floating body 61 is preferably arranged at a position above or below the inclination of the photovoltaic power generation panel 11 . As shown in FIG. 7 , in the photovoltaic power generation system 10 , the second auxiliary floating body 61 is arranged at a position above or below the inclination of the photovoltaic panel 11 . For example, when the photovoltaic panel 11 tilted down to the south receives sunlight, a shadow extends to the north side, which is the upward tilt of the photovoltaic panel 11 . Then, when the extended shadow is projected onto the light receiving surface of another photovoltaic power generation panel 11 adjacent to the north side, the power generation amount decreases. However, due to the second auxiliary floating body 61 of the present embodiment, the interval between the panels in the direction along the inclination of the photovoltaic panel 11 is increased, and the light receiving surface of another adjacent photovoltaic panel 11 is shaded. can be suppressed.

In addition, the first auxiliary floating body 60 and the second auxiliary floating body 61 are used as spaces for workers to pass and work when performing maintenance on the photovoltaic power generation system 10 . Therefore, the upper surfaces of the first auxiliary floating body 60 and the second auxiliary floating body 61 are preferably flat. Further, it is more preferable that the upper surface of the apparatus has an uneven structure to prevent the operator from slipping. Since the solar panel 11 is not mounted on the first auxiliary floating body 60 and the second auxiliary floating body 61, it is not necessary to make the area as large as the floating body 21 when viewed from above.

As shown in FIG. 8, in the floating body device 20 of the present embodiment, the fixing member 30 is connected to the portion where the ear portion 62 and the ear portion 22 are overlapped. The fixing member 30 has a concave portion on the side surface in the central area in the longitudinal direction, which is the direction extending along the first auxiliary floating body 60 or the second auxiliary floating body 61 . One end of the mooring cable 40 is wound around the recess of the fixing member 30 . Thus, the mooring cable 40 and the fixing member 30 are connected, and the other end side of the mooring cable 40 is connected to the mooring pile 41 fixed to the bottom of the water to moor the solar power generation system 10 . Since the second auxiliary floating body 61 does not have the photovoltaic panel 11 mounted thereon, it can be made smaller than the floating body 21 when viewed from above. Therefore, the length of the outer peripheral edge of the second auxiliary floating body 61 is shorter than that of the floating body 21 , and the interval between the ear portions 62 is smaller than the interval between the ear portions 22 of the floating body 21 . Therefore, the fixing member 30 of this embodiment can be made smaller than that of the first embodiment, and the weight of the fixing member 30 can be reduced.

FIG. 10 is a top view of the photovoltaic power generation system 10 of this embodiment. As shown in FIG. 10 , the solar power generation system 10 of this embodiment includes six floating bodies 21 , four first auxiliary floating bodies 60 , three second auxiliary floating bodies 61 and six fixing members 30 . The photovoltaic power generation system 10 of the present embodiment is configured by connecting six floating bodies 21 in two rows and three columns via first auxiliary floating bodies 60 and second auxiliary floating bodies 61 to form an integrated solar power generation system 10 . A total of six fixing members 30 are connected to the ear portion 22 and the ear portion 62 on the outer peripheral edge of the photovoltaic power generation system 10 . The connecting member 50 connects the first connecting portion 31 and the second connecting portion 32 to different positions of the ear portions 62 .

In FIG. 10, the lengths of the outer short sides of the first auxiliary floating body 60 and the outer short sides of the second auxiliary floating body 61 are substantially equal when viewed from above. In the photovoltaic power generation system 10 shown in FIG. 6 of the first embodiment, the fixing members 30 connected to the short sides of the floating body 21 and the fixing members 30 connecting to the long sides of the floating body 21 need to have different lengths. There is On the other hand, in this embodiment, all of the fixing members 30 can have the same length. Therefore, it is no longer necessary to properly use fixing members 30 having different shapes depending on the mounting location, and the workability of the photovoltaic power generation system 10 is improved.

(Third embodiment)
A third embodiment of the present invention will be described below. This embodiment differs from the above-described first and second embodiments in the structure of the fixing member. The following description focuses on the structure of the fixing member.

FIG. 11 is a cross-sectional view of the fixing member 70 of this embodiment. When the fixing member 70 is connected to the floating body 21 of the first embodiment, the cross section of the fixing member 70 in the direction intersecting the direction extending along the floating body 21 is rectangular with the long side along the horizontal direction. The fixing member 70 conforms to the fixing member 30 shown in FIG. 4 except for the cross section, and FIG. 11 corresponds to FIG. 4(c). The fixing member 70 has a concave portion on one side surface of its central region, and steps at both ends of the concave portion are a first restricting portion 77 and a second restricting portion 78 . One end of the mooring cable 40 is wound around and connected to the recess. The fixing member 70 is connected to the photovoltaic power generation system 10 so that the long side of the cross section of the fixing member 70 extends in the horizontal direction.

Here, at the position where the one end side of the mooring cable 40 is wound, the length of the short side in the cross-sectional outline of the fixing member 70 is h, and the length of the long side is b. The length of the short side of the hollow portion in the section of the fixing member 70 is _h1 , and the length of the long side is _b1 . Let t be the thickness of the side surface of the fixing member 70 . The direction in which the fixing member 70 receives the load from the mooring cable 40 is the horizontal direction, which is the right direction in FIG. At this time, the section modulus Z ₂ of the fixing member 70 is (bh ³ −b ₁ h ₁ ³ )/6h, and the area occupied by the member in the cross section is S ₂ =bh−b ₁ h ₁ .

In the fixing member 30 of the first embodiment, which is a comparative object, as shown in FIG. If the length of one side of the hollow region is a ₁ and the thickness of the side surface of the fixing member 30 is t, the section modulus Z ₁ =(a ⁴ -a ₁ ⁴ )/6a, and the area occupied by the member in this cross section is S ₁ =a ² -a ₁ ² .

Assume that the hollow square cross-section fixing member 30 and the hollow rectangular cross-section fixing member 70 have the same weight. If the fixing member 30 and the fixing member 70 have the same side thickness t, the relationship 2a=b+h is established. If a=40 cm, b=50 cm, h=30 cm, and t=1 cm, a ₁ =38 cm, b ₁ =48 cm, and h ₁ =28 cm. When the section modulus is calculated, the fixing member 30 has a section modulus Z ₁ =about 1979 cm ³ , while the fixing member 70 has a section modulus Z ₂ =about 2178 cm ³ . Therefore, even with the same weight, the fixing member 70 having a rectangular cross section with long sides along the horizontal direction has a larger section modulus. Therefore, in the mooring structure of the photovoltaic power generation system 10 , the strength can be improved without increasing the weight of the fixing member 70 . The photovoltaic system 10 installed on water mainly moves along the water surface. Therefore, the horizontal direction is the main direction of the load applied to the fixing member 70 at the position where the one end side of the mooring cable 40 is wound. Therefore, at the position where the one end side of the mooring cable 40 is wound, the strength of the fixing member 70 is preferably greater in the horizontal direction than in the vertical direction.

(Fourth embodiment)
A fourth embodiment of the present invention will be described below. This embodiment differs from the above-described first and second embodiments in the structure of the fixing member. The following description focuses on the structure of the fixing member.

FIG. 12 is a diagram showing the fixing member 80 of this embodiment. The fixing member 80 shown in FIG. 12(a) has recesses on two sides of the outer circumference. The fixing member 80 shown in FIG. 12(b) has recesses on all four sides of the outer periphery. The fixing member 80 can form a concave portion at an arbitrary position by pressing the side surface of the tubular portion.

A first connecting portion 81 and a second connecting portion 82 having through holes 83 are provided at both ends of the fixing member 80 . The fixing member 80 has a center equidistant from the first connecting portion 81 and the second connecting portion 82 , and a concave portion is provided on the side surface of the fixing member 80 in a central region including the center of the fixing member 80 . The steps at both ends of the concave portion are the first restricting portion 87 and the second restricting portion 88 which are the restricting portion 86 . One end side of the mooring cable 40 is wound around the fixing member 80 between the first restricting part 87 and the second restricting part 88, and the fixing member 80 and the mooring cable 40 are connected.

The larger the number of side surfaces of the fixing member 80 having recesses, the easier it is for the restricting portion 86 to restrict the movement of the mooring cable 40 . This facilitates keeping the position of the mooring cable 40 within the central region of the fixing member 80 . On the other hand, the smaller the number of side surfaces of the fixing member 80 provided with recesses, the larger the cross-sectional area of the fixing member 80 at the position where the one end side of the mooring cable 40 is wound, and the higher the strength of the fixing member 80. can. The magnitude of the load expected to be applied to the mooring cable 40 varies depending on various conditions such as the number of photovoltaic power generation panels 11 included in the photovoltaic power generation system 10 and the average wind speed of the area where the photovoltaic power generation system 10 is installed. Therefore, the structure of the restricting portion 86 provided on the fixed member 80 may be appropriately selected according to the magnitude of the expected load.

In addition, as shown in FIG. 12(c), the end portion of the fixing member 80 may be crushed so that the first connection portion 81 and the second connection portion 82 have a flat shape in which two plates overlap each other. By flattening the first connection portion 81 and the second connection portion 82, the shaft portion of the bolt 51 on the male side of the connection member is shortened, the bolt 51 is lightened, and the connection member 50 is easily attached.

(Fifth embodiment)
A fifth embodiment of the present invention will be described below. This embodiment differs from the above-described first and second embodiments in the structure of the fixing member. The following description focuses on the structure of the fixing member.

FIG. 13 is a diagram showing the structure of the fixing member 90 of this embodiment. 13(a) and 13(b) are perspective views from different viewpoints. FIG. 13(c) is a cross-sectional view taken along line XII-XII in FIG. 13(b). A first restricting portion 97 and a second restricting portion 98 are attached to the fixing member 90 of the present embodiment. The first restricting portion 97 and the second restricting portion 98 sandwich a central region including the center equidistant from the first connecting portion 91 and the second connecting portion 92 having the through holes 93 at both ends of the fixing member 90 . A first restricting portion 97 and a second restricting portion 98 protrude from the upper surface of the fixing member 90 . One end side of the mooring cable 40 is wound around the central region of the fixing member 90 sandwiched between the first restricting part 97 and the second restricting part 98 to connect the fixing member 90 and the mooring cable 40 .

FIG. 14 is a side view of the fixing member 90 of this embodiment. As shown in FIG. 14 , even if the mooring cable 40 moves along the longitudinal direction of the fixing member 90 , the movement range of the mooring cable 40 is limited to the center of the fixing member 90 by the first restricting portion 97 and the second restricting portion 98 . Confined within the area. Therefore, it is possible to prevent a biased load from being applied to either one of the first connection portion 91 and the second connection portion 92 .

For example, the first restricting portion 97 and the second restricting portion 98 are made of block-shaped parts, and these block-shaped parts are welded or screwed to the side surface of the fixing member 90 . Alternatively, the first restricting portion 97 and the second restricting portion 98 may be two bolts protruding from the side surface of the fixing member 90 with the central region of the fixing member 90 interposed therebetween. Also, the first restricting portion 97 and the second restricting portion 98 of the present embodiment may be provided on any of the four side surfaces of the fixing member 90 . Further, the first restricting portion 97 and the second restricting portion 98 having different structures may be provided for each side surface.

With the above configuration, the first restricting portion 97 and the second restricting portion 98 can be realized without reducing the cross-sectional area of the fixing member 90 at the position where the one end portion of the mooring cable 40 is wound. The fixing member 90 of the present embodiment is stronger than the configuration in which the concave portion is provided on the side surface of the fixing member 30 of the first embodiment, thereby improving the durability of the mooring structure.

(Sixth embodiment)
A sixth embodiment of the present invention will be described below. This embodiment differs from the above-described first and second embodiments in the structure of the fixing member. The following description focuses on the structure of the fixing member.

FIG. 15 is a diagram showing the fixing member 100 of this embodiment. 15(a) and 15(b) are perspective views from different viewpoints. FIG. 15(c) is a cross-sectional view taken along line XIV-XIV in FIG. 15(b).

In the fixing member 100 of the present embodiment, when attached to the floating body, the fixing member 100 is equidistant from the first connecting portion 101 and the second connecting portion 102 having through holes 103 at both ends in the longitudinal direction, which is the direction extending along the floating body. A recess is provided in the sides of the fixation member 100 in a central region of the fixation member 100 including the center at . The steps at both ends of the concave portion are the first restricting portion 107 and the second restricting portion 108, respectively. A bridging member 109 spans the first restricting portion 107 and the second restricting portion 108 . The bridging member 109 is a plate-shaped member such as a metal plate, and is fixed to the side surface of the fixing member 100 with a fastening member such as a screw.

FIG. 16 is a top view of the fixing member 100 of this embodiment. The fixing member 100 and the bridging member 109 are arranged in parallel, and a gap is provided between them. One end of the mooring cable 40 is wound around the central region of the fixing member 100 through the space between the fixing member 100 and the installation member 109 to connect the fixing member 100 and the mooring cable 40 . That is, as shown in FIG. 15( c ), a portion of the mooring cable 40 is sandwiched between the side surface of the fixing member 100 and the construction member 109 .

When the floating body device 20 moves, for example, the mooring line 40 is pulled in one direction and then pulled in another direction, the mooring line 40 may become loose. Even in such a case, in this embodiment, the mooring cable 40 can be prevented from getting over the first restricting portion 107 and the second restricting portion 108 by the installation member 109 . Therefore, the installation member 109 securely fastens the mooring cable 40 between the first restricting portion 107 and the second restricting portion 108, and the durability of the mooring structure by the fixing member 100 is improved.

(Seventh embodiment)
A seventh embodiment of the present invention will be described below. This embodiment differs from the above-described first and second embodiments in the structure of the fixing member. The following description focuses on the structure of the fixing member.

FIG. 17 is a diagram showing the fixing member 110 of this embodiment. 17(a) and 17(b) are perspective views from different viewpoints. FIG. 17(c) is a cross-sectional view taken along line XVI--XVI of FIG. 17(b). In the fixing member 110 shown in FIG. 17, like the fixing member 90 of the fifth embodiment, the center of the fixing member 110 including the center equidistant from the first connection portion 111 and the second connection portion 112 having the through holes 113 Two members are fixed across the region. These two members constitute a first restricting portion 117 and a second restricting portion 118, and one end side of the mooring cable 40 is wound around the center area of the fixing member 110 between the fixing member 110 and the mooring cable 40. is connected. A bridging member 119 spans the first restricting portion 117 and the second restricting portion 118 .

FIG. 18 is a side view of this embodiment. As shown in FIG. 18, the fixing member 110 and the bridging member 119 are arranged in parallel with a certain gap therebetween. Then, the mooring cable 40 wound around the fixing member 110 passes between the fixing member 110 and the construction member 119 and is wound around the fixing member 110 to connect the mooring cable 40 and the fixing member 110 . As shown in FIG. 17(c), part of the mooring cable 40 is sandwiched between the fixing member 110 and the construction member 119 which are aligned with each other. With this structure, the restricting portion 116 and the bridging member 119 can be constructed without reducing the cross-sectional area of the central region of the fixing member 110 . Thereby, the strength is improved compared to the structure of the fixing member 100 of FIG. 15, and the durability of the mooring structure can be improved.

(Eighth embodiment)
An eighth embodiment of the present invention will be described below. This embodiment differs from the above-described first and second embodiments in the structure of the fixing member. The following description focuses on the structure of the fixing member.

FIG. 19 is a diagram showing the fixing member 120 of this embodiment. 19(a) and 19(b) are perspective views from different viewpoints. FIG. 19(c) is a cross-sectional view along line XVIII-XVIII in FIG. 19(b). In this embodiment, as shown in FIG. 19 , the center of the fixing member 120 is equidistant from the first connecting portion 121 and the second connecting portion 122 at both ends of the fixing member 120 having the through holes 123 . An integrated member bent in a U shape is fixed to the side surface of the fixing member 120 with the center of the fixing member 120 sandwiched between the ends thereof. That is, the U-shaped member is obtained by integrating the first restricting portion 127, the second restricting portion 128, and the construction member 129. As shown in FIG. Two ends of the U-shaped member are fixed to the side surfaces of the fixing member 120, and one end side of the mooring cable 40 is wound around the fixing member 120 through between the two ends. By passing the mooring cable 40 through the portion surrounded by the U-shaped member and the fixing member 120 , the mooring cable 40 can be prevented from climbing over the first restricting portion 127 and the second restricting portion 128 . Thereby, in the fixing member 120, it is possible to prevent the load from being unevenly applied to either one of the first connection portion 121 and the second connection portion 122. FIG.

(Ninth embodiment)
A ninth embodiment of the present invention will be described below. This embodiment differs from the above-described first and second embodiments in the structure of the fixing member. The following description focuses on the structure of the fixing member.

FIG. 20 is a diagram showing the fixing member 130 of this embodiment. 20(a) and 20(b) are perspective views from different viewpoints. FIG. 20(c) is a cross-sectional view along line XIX-XIX in FIG. 20(b).

The fixing member 130 of the present embodiment is a cylinder having a circular cross section in a direction intersecting the direction extending along the floating body 21 when connected to the floating body 21, and both ends of the cylinder are directed toward the floating body 21 side. extended. The two ends from which the both ends are extended are flattened to form a flat shape in which two plates are overlapped, and a through hole 133 is provided in each of the two ends. Those two ends become the first connecting portion 131 and the second connecting portion 132 . The first connecting portion 131 and the second connecting portion 132 are connected to the ear portion 22 of the floating body 21 or the ear portion 62 of the first auxiliary floating body 60 or the second auxiliary floating body 61 by the connecting member 50 as in the above-described embodiment. be done.

At a position equidistant from the first connection portion 131 and the second connection portion 132 , there is a longitudinal center along which the fixing member 130 extends along the floating body 21 . A first restricting portion 137 and a second restricting portion 138 that serve as the restricting portion 136 are provided on both sides of the center. As shown in FIG. 20, the fixing member 130 is provided with a concave portion on the side surface in the central region, and the steps at both ends of the concave portion are the first restricting portion 137 and the second restricting portion 138 . One end of the mooring cable 40 is wound around the fixing member 130 at a position surrounded by the first restricting portion 137 and the second restricting portion 138 . Thus, the fixing member 130 and the mooring cable 40 are connected.

For example, the fixing member 30 of the first embodiment has a prismatic outer shape, and has four corners in a cross section in a direction intersecting the direction extending along the floating body 21 when connected to the floating body 21 . Therefore, when the mooring cable 40 is pulled, the mooring cable 40 is pressed against the corners of the fixing member 30 , and a large load is locally applied to the mooring cable 40 . When the mooring cable 40 moves along the side surface of the fixing member 30 in this state, a large amount of friction is generated between the corner portion of the fixing member 30 and the mooring cable 40 . In this embodiment, the fixing member 130 is a cylindrical member, and has a columnar outer shape, and the side surface of the fixing member 130 has no corners. By doing so, it is possible to suppress the occurrence of large friction in the mooring cable 40 and improve the durability of the mooring cable 40 .

In the fixing member 130 of the present embodiment, the steps at both ends of the concave portion are the first restricting portion 137 and the second restricting portion 138, respectively. , these convex portions may be used as the restricting portions 136 . Further, as in the fifth embodiment, another member may be attached to the side surface of the fixing member 130 to form the restricting portion 136, or as in the sixth embodiment, the bridging member arranged in line with the fixing member 130 may be the first restricting portion 137. and the second restricting portion 138 . Moreover, the cross-sectional shape of the fixing member 130 is not limited to the perfect circle shown in FIG. 20, and may be an elliptical shape. In this case, if the fixing member 130 is arranged so that the major axis of the ellipse extends in the horizontal direction, the section modulus can be increased even if the weight of the fixing member 130 is the same as in the case where the fixing member 130 has a perfectly circular cross-sectional shape. Thereby, even if the fixing member 130 has the same weight, the strength against the load in the horizontal direction can be improved.

The invention is not limited to the embodiments described above. The technical scope of the present invention also includes forms obtained by adding modifications to the above-described embodiments and forms obtained by appropriately combining the technical means disclosed in the above-described embodiments.

10 solar power generation system 11 solar power generation panel 20 floating device 21 floating body 22 ears 23 through holes 30, 70, 80, 90, 100, 110, 120, 130 fixing members 31, 81, 91, 101, 111, 121, 131 first connecting portions 32, 82, 92, 102, 112, 122, 132 second connecting portions 33, 83, 93, 103, 113, 123, 133 through holes 36, 86, 136 restricting portions 37, 87, 97, 107, 117, 127, 137 First restricting part 38, 88, 98, 108, 118, 128, 138 Second restricting part 40 Mooring rope 41 Mooring pile 50 Connecting member 51 Connecting member male side (bolt)
52 Connecting member female side (nut)
53 Protective pipe 60 First auxiliary floating body 61 Second auxiliary floating body 62 Ear portion 63 Through holes 109, 119, 129 Installation member

Claims (8)

A floating body for mounting a photovoltaic panel,
a fixing member that is connected to the floating body at two different points, has a restricting portion between the two points connected to the floating body, and has a tubular shape at least part of a portion that extends along the floating body;
a mooring cable whose one end side is wound around the fixing member and whose other end side is fixed to the ground or the bottom of the water;
The floating body has a first ear and a second ear, each projecting outward from a side surface of the floating body in a plan view,
The fixing member has a first connection portion and a second connection portion extending toward the floating body on both end sides thereof, the first connection portion being connected to the first ear portion, and the second connection portion being connected to the first ear portion. is connected to the second ear,
The regulation unit
Including the first regulation unit and the second regulation unit,
one end side of the mooring cable is wound around the fixing member between the first restricting portion and the second restricting portion;
A floating body device that restricts movement of a position where one end of the mooring cable is wound along the fixing member. The floating body device according to claim 1 , wherein the first restricting portion and the second restricting portion protrude outward from the outer peripheral side surface of the fixed member at the position where the mooring cable is wound. 3. The floating body device according to claim 1, wherein said fixed member has a recess on an outer peripheral side surface, and steps at both ends of said recess serve as said first restricting portion and said second restricting portion , respectively. Having a bridging member that spans the first restricting portion and the second restricting portion,
The floating body apparatus according to any one of claims 1 to 3 , wherein the mooring cable is sandwiched between the installation member and the fixed member. 5. Any one of claims 1 to 4 , wherein the tubular portion of the fixing member has a rectangular cross section in a direction intersecting a direction extending along the floating body, and a long side thereof extends in a horizontal direction. 3. Floating body device according to item. The floating body has a rectangular area in plan view,
The floating body device according to any one of claims 1 to 5, wherein said first ear and said second ear protrude from corners of said rectangular area. a plurality of floating bodies for mounting photovoltaic panels;
an auxiliary floating body arranged between the plurality of floating bodies and connecting the plurality of floating bodies;
a fixing member that is connected to the auxiliary floating body at two different points, has a restricting portion between the two points connected to the auxiliary floating body, and has a tubular shape at least part of a portion that extends along the auxiliary floating body;
a mooring cable whose one end side is wound around the fixing member and whose other end side is fixed to the ground or the bottom of the water;
The auxiliary float has a first ear portion and a second ear portion, each projecting outward from the side surface of the auxiliary float in a plan view,
The fixing member has a first connecting portion and a second connecting portion extending toward the auxiliary floating body on both end sides thereof, the first connecting portion being connected to the first ear portion, and the second connecting portion being connected to the first ear portion. is connected to the second ear,
The regulation unit
Including the first regulation unit and the second regulation unit,
one end side of the mooring cable is wound around the fixing member between the first restricting portion and the second restricting portion;
A floating body device that restricts movement of a position where one end of the mooring cable is wound along the fixing member. A photovoltaic power generation system comprising a photovoltaic panel mounted on the floating device according to any one of claims 1 to 7 .

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