JP7779594B1 - Solar power generation equipment - Google Patents

Abstract

[Problem] To increase the value of power generation by solar panels in a power grid. [Solution] A solar power generation device (10) includes a plurality of pillars (20) arranged at intervals in a longitudinal direction (X) and erected on the ground, and a solar panel (40) arranged between the plurality of pillars (20), with a light-receiving surface (40F1) formed on at least one surface, and generating power from sunlight on the light-receiving surface (40F1). The plurality of pillars (20) support the solar panel (40) so that the light-receiving surface (40F1) faces east or west. [Selected Figure] Figure 12

Description

The present invention relates to a solar power generation device.

In recent years, various proposals have been made regarding solar power generation systems with solar panels installed on the ground. For example, Patent Document 1 proposes a solar power generation system with multiple solar panels installed on the ground.

JP 2024-145753 A

However, the solar panels installed are laid flat on farmland or in parking lots so that maximum power generation can be achieved when the sun is at its highest point in the sky. Therefore, the solar power generation device disclosed in Patent Document 1 leaves room for improvement in terms of increasing the value of power generation by solar panels in the power grid.

The objective of the present invention is to provide a solar power generation device that is an improvement over conventional solar power generation devices and can increase the value of power generation by solar panels in the power grid.

To solve the above problem, a solar power generation device according to the present invention includes a plurality of pillars arranged at intervals and erected on the ground, and solar panels arranged between the plurality of pillars, each having a light-receiving surface formed on at least one side thereof, generating electricity from sunlight at the light-receiving surface. The plurality of pillars support the solar panels so that the light-receiving surface faces east or west. The solar power generation device is electrically connected to a power grid of a power company. Each of the pillars includes a first member arranged below the first member in the vertical direction and a second member arranged above the first member in the vertical direction. The first member and the second member are formed so that the rigidity of the first member in the longitudinal direction is greater than the rigidity of the second member in the longitudinal direction. The first member extends in the vertical direction and is formed in a generally H-shape in a cross section transverse to the vertical direction, and includes a flat base portion and a pair of flat opposing portions arranged at both ends of the base portion, facing each other in short directions perpendicular to the vertical direction and the longitudinal direction. The second member includes at least a base portion extending in the up-down direction and having a generally C-shaped cross section transverse to the up-down direction, the base portion being formed in a flat plate shape, and a pair of first opposing portions disposed at both ends of the base portion, the first opposing portions being formed in a flat plate shape and opposing each other in the short direction perpendicular to the up-down direction and the longitudinal direction. The base portion of the first member has a plurality of through holes formed therethrough that penetrate the base portion in the longitudinal direction, the plurality of through holes being arranged along the up-down direction, the base portion of the second member has a plurality of through holes formed therethrough that penetrate the base portion in the longitudinal direction, the plurality of through holes being arranged along the up-down direction, and tips of bolts are inserted into the through holes of the first member and the through holes of the second member, and the first member is connected to the second member by screwing the bolts and nuts together. At a portion where a plurality of through holes are formed in the base portion of the first member and a portion where a plurality of through holes are formed in the base portion of the second member overlap, the second member is connected to the first member in a state where one of the pair of opposing portions is in contact with one of the first opposing portions of the pair of first opposing portions, and the other of the pair of opposing portions is in contact with the other first opposing portion of the pair of first opposing portions.

The solar power generation device according to one or more embodiments of the present invention has the above-described structure, which can increase the value of power generation by solar panels in the power grid.

FIG. 1 is a front view of a solar power generation device according to an embodiment. FIG. 2 is a perspective view of the solar power generation device shown in FIG. 1 as viewed from the front side. FIG. 3 is an exploded perspective view of a column provided in the solar power generation system shown in FIG. FIG. 4 is an exploded perspective view of the solar panel relative to the beam in the solar power generation system shown in FIG. FIG. 5 is a cross-sectional view taken along the line AA in FIG. FIG. 6 is an enlarged cross-sectional view of a part of FIG. FIG. 7 is an enlarged perspective view of a portion C of FIG. FIG. 8 is an enlarged perspective view of a portion B of FIG. FIG. 9 is a perspective view of the solar power generation device shown in FIG. FIG. 10 is a cross-sectional view taken along the line DD in FIG. FIG. 11 is an explanatory diagram of how a solar panel is attached to a beam in a conventional solar power generation system. FIG. 12 is an explanatory diagram schematically illustrating a solar panel provided in the solar power generation apparatus shown in FIG.

[Embodiment]
The following embodiment relates to a solar power generation device 10 according to the present invention, and includes not only essential configurations of the invention but also optional and preferred configurations. Hereinafter, an embodiment of the solar power generation device 10 according to the present invention will be described with reference to the accompanying drawings.

The solar power generation system 10 according to this embodiment is installed, for example, on farmland, ranch, parking lot, etc. As shown in Figures 1 and 2, the solar power generation system 10 according to this embodiment includes multiple pillars 20, multiple beams 30, multiple solar panels 40, and multiple connectors 50.

Figure 1 is a front view of a solar power generation device 10 according to an embodiment. Figure 2 is a perspective view of the solar power generation device 10 shown in Figure 1 as seen from the front side.

The solar power generation device 10 according to this embodiment has a longitudinal direction X, a lateral direction Y perpendicular to the longitudinal direction X, and an up-down direction Z perpendicular to both the longitudinal direction X and the lateral direction Y.

The multiple pillars 20 are arranged, for example, at intervals in the longitudinal direction X, and are each erected on the ground surface GR. In the solar power generation device 10 according to this embodiment, for example, the surface of the ground surface GR on which the pillars 20 are erected coincides with the horizontal plane HF.

As shown in Figure 3, each pillar 20 has a first member 21 arranged below in the vertical direction Z and a second member 22 arranged above the first member 21 in the vertical direction Z. Figure 3 is an exploded perspective view of the pillar 20 provided in the solar power generation device 10 shown in Figure 1.

The first member 21 and the second member 22 are formed so that the rigidity of the first member 21 in the longitudinal direction X is greater than the rigidity of the second member 22 in the longitudinal direction X. The first member 21 and the second member 22 are also formed so that the rigidity of the first member 21 in the lateral direction Y is greater than the rigidity of the second member 22 in the lateral direction Y. The first member 21 is then buried in the ground.

Each of the first members 21 is formed of a metal material and extends in the vertical direction Z. Furthermore, the cross section of each of the first members 21 that intersects with the vertical direction Z is H-shaped. In other words, each of the first members 21 is an H-shaped steel beam. The surface of each of the first members 21 is painted to prevent rust from forming.

Describing the first member 21 more specifically, in cross section, the first member 21 comprises a flat base portion 211 and a pair of opposing portions 212a, 212b, which are also flat and located at both ends of the base portion and face each other in the short direction Y.

Furthermore, the base portion of the first member 21 has a plurality of through holes 21H formed in the upper portion in the vertical direction Z, penetrating the base portion 211 in the longitudinal direction X. The plurality of through holes 21H are arranged, for example, at equal intervals in the vertical direction Z.

Each of the second members 22 is formed of a metal material and extends in the vertical direction Z. Furthermore, each of the second members 22 has a generally C-shaped cross section that intersects with the vertical direction Z. The surface of each of the second members 22 is painted to prevent rust from forming.

To explain the second member 22 more specifically, as shown in Figure 6, in cross section, the second member 22 has a base portion 221, a pair of first opposing portions 222a, 222b, a pair of narrow portions 223a, 223b, a pair of second opposing portions 224a, 224b, and a pair of bent portions 225a, 225b.

The base portion 221 is formed in a flat plate shape. The pair of first opposing portions 222a, 222b are arranged at both ends of the base portion 221, are formed in a flat plate shape, and face each other in the short direction Y.

The pair of narrow width portions 223a, 223b are arranged at both ends of the pair of first opposing portions 222a, 222b, are formed in a flat plate shape, and face each other in the short direction Y. Furthermore, the pair of narrow width portions 223a, 223b gradually slope from both ends of the pair of first opposing portions 222a, 222b toward the tips so that the distance between them gradually narrows.

The pair of second opposing portions 224a, 224b are arranged at both ends of the pair of narrow portions 223a, 223b, are formed in a flat plate shape, and face each other in the short direction Y.

The pair of bent portions 225a, 225b are arranged at both ends of the pair of second opposing portions 224a, 224b, are formed in a flat plate shape, and are opposed to each other in the short direction Y. Furthermore, the pair of bent portions 225a, 225b are arranged so that the distance between them in the short direction Y is wide from both ends of the pair of second opposing portions 224a, 224b.

Since the second member 22 is configured as described above, the base portion 221 and the pair of first opposing portions 222a, 222b form a first routing space 22S in which the cable connected to the solar panel 40 is routed.

A fifth through hole 224H is formed in each of the pair of second opposing portions 224a, 224b of the second member 22 having the above-described configuration, penetrating the second opposing portions 224a, 224b in the short-side direction Y. As shown in Figure 7, the fifth through hole 224H is formed in an elliptical shape whose dimension in the up-down direction Z is longer than its dimension in the longitudinal direction X. Figure 7 is an enlarged perspective view of portion C in Figure 4.

Furthermore, as shown in FIG. 3, a plurality of through holes 22H are formed in the base portion 221 of the second member 22, penetrating the base portion 221 in the longitudinal direction X. The plurality of through holes 22H are arranged, for example, at equal intervals in the vertical direction Z.

Next, we will explain how to assemble the first member 21 and the pair of second members 22. First, the worker positions the pair of second members 22 so that the base portions 221 are back-to-back and the base portions 221 of the pair of second members 22 sandwich the base portion 211 of the first member 21.

Next, the worker inserts the tip of the bolt Bo4 into the through-hole 22H of the base portion 221 of the second member 22. Next, the worker inserts the tip of the bolt Bo4 into the through-hole 21H of the base portion 211 of the first member 21. Next, the worker inserts the tip of the bolt Bo4 into the through-hole 22H of the base portion 221 of the second member 22. Next, the worker threads the threaded portion of the bolt Bo4 into the threaded portion of a nut (not shown), thereby assembling the first member 21 and the pair of second members 22. Then, by performing the same procedure, the bolt Bo4, whose tip has been inserted into the through-hole 21H of the first member 21 and the through-hole 22H of the second member 22, is threaded into the nut, thereby connecting the first member 21 and the second member 22 to form the column 20.

As shown in FIG. 12, each of the pillars 20 configured in this manner is erected on the ground GR so that the axis 20z of the pillar 20 is perpendicular to the horizontal plane HF. In other words, in the solar power generation device 10 according to this embodiment, the intersection angle θ1 between the axis 20z of the pillar 20 and the horizontal plane HF is 90 degrees.

As shown in FIG. 4, each beam 30 extends along the longitudinal direction X and connects two columns 20 in the longitudinal direction X. Each beam 30 is made of a metal material. Each beam 30 has a generally C-shaped cross section in the longitudinal direction X. The surface of each beam 30 is painted to prevent rust.

To explain the beams 30 more specifically, as shown in Figures 5 and 7, each beam 30 comprises a base portion 31, a pair of opposing portions 32a, 32b, and a pair of bent portions 33a, 33b.

The base portion 31 is formed in a flat plate shape. The pair of opposing portions 32a, 32b are located at both ends of the base portion 31 in the short-side direction Y, are formed in a flat plate shape, and face each other in the short-side direction Y.

The pair of bent portions 33a, 33b are arranged so that the distance between them is wide in the short direction Y from both ends of the pair of opposing portions 32a, 32b.

Because the beam 30 is configured as described above, the base portion 31 and the pair of opposing portions 32a, 32b form a second routing space 30S in which a cable connected to the solar panel 40 is routed (see Figure 10). As shown in Figures 5 and 7, the first routing space 22S and the second routing space 30S are connected at both ends of the beam 30 in the longitudinal direction X.

Furthermore, in the opposing portions 32a, 32b of such a beam 30, a sixth through hole 31H1 is formed at each end in the longitudinal direction X, penetrating the opposing portions 32a, 32b in the short direction Y. As shown in Figure 7, the sixth through hole 31H1 is formed in an elliptical shape whose dimension in the longitudinal direction X is longer than its dimension in the up-down direction Z.

Furthermore, fourth through holes 31H2 are formed in the opposing portions 32a, 32b of the beam 30, excluding both ends in the longitudinal direction X, penetrating the opposing portions 32a, 32b in the short direction Y. As shown in Figure 8, the fourth through holes 31H2 are formed in an elliptical shape whose dimension in the longitudinal direction X is longer than its dimension in the up-down direction Z.

The solar power generation system 10 according to this embodiment also includes multiple fastening devices for attaching one component to another. The fastening devices are, for example, composed of a bolt Bo having a head and a cylindrically formed thread, and a nut Nu formed in an annular shape.

The bolt Bo is a fastener, and the threads formed on the outer surface of the bolt Bo thread into the threads formed on the inner surface of the annular nut, thereby maintaining one part attached to another.

Then, using a third fastening device comprising a third bolt (third fastener) Bo3 and a third nut Nu3, the worker inserts the tip of the third bolt Bo3 into the fifth through hole 224H of the second member 22 and the tip of the third bolt Bo3 into the sixth through hole 31H1 of the beam 30, and then attaches the beam 30 to the column 20 by screwing the third bolt Bo3 into the third nut Nu3.

Next, each of the multiple solar panels 40 will be described. As shown in Figures 1 and 2, each solar panel 40 is arranged between multiple pillars 20 (more specifically, two pillars 20). When viewed from the short direction Y, each solar panel 40 is rectangular and formed like a flat plate. As shown in Figure 4, each solar panel 40 includes a frame 41, vertical beams 42a and horizontal beams 42b arranged inside the frame 41, and a panel body 43 arranged inside the frame 41 and generating electricity using sunlight.

Furthermore, in each solar panel 40 according to this embodiment, the panel body 43 is formed in a plate shape and, as shown in Figures 5 and 11, has a first light-receiving surface 40F1 disposed on one side (front surface) and a second light-receiving surface 40F2 disposed on the other side (back surface). In other words, the solar panel 40 according to this embodiment is capable of generating electricity from sunlight on the first light-receiving surface 40F1 on one side, and also on the second light-receiving surface 40F2 on the other side. In other words, the solar panel 40 according to this embodiment is capable of generating electricity on two sides (both the front and back).

The first light-receiving surface 40F1 is a light-receiving surface capable of generating electricity using sunlight. The solar panel 40 is positioned so that the first normal 40NL1, which is perpendicular to the surface of the first light-receiving surface 40F1, faces due east, as shown in FIG. 12. In other words, the solar power generation device 10 is positioned so that the first light-receiving surface 40F1 faces due east.

The second light-receiving surface 40F2 is a light-receiving surface capable of generating electricity using sunlight. The solar panel 40 is positioned so that the second normal 40NL2, which is perpendicular to the surface of the second light-receiving surface 40F2, is oriented, for example, due west. In other words, the solar power generation device 10 is positioned so that the second light-receiving surface 40F2 faces due west.

Each frame 41 has a plurality of second through holes 40H formed therein that penetrate the frame 41 in the short-side direction Y. In other words, the second through holes 40H penetrate the solar panel 40 in the short-side direction Y. In the solar power generation device 10 according to this embodiment, the second through holes 40H are formed in the upper part of the frame 41 in the vertical direction Z, and also in the lower part of the frame 41 in the vertical direction Z.

Each of the multiple connectors 50 connects the beam 30 and the solar panel 40. Each of the multiple connectors 50 has a first portion 51, a second portion 52, and a third portion 53.

The first portion 51 is formed in a plate shape. The mounting portion is positioned so that the surface of the first portion 51 coincides with the horizontal plane HF.

The second portion 52 is formed in a plate shape. The second portion 52 is disposed at one end of the first portion 51 in the short-side direction Y. In this state, the surface of the second portion 52 is perpendicular to the short-side direction Y. In this state, the second portion 52 is disposed on one side in the vertical direction Z relative to the first portion 51. For example, in Figure 8, the second portion 52 is disposed above the first portion 51 in the vertical direction Z.

In addition, a third through-hole 50H1 is formed in the second portion 52 in the short-side direction Y, penetrating the second portion 52.

The third portion 53 is formed in a plate shape. The third portion 53 is disposed at the other end of the first portion 51 in the short-side direction Y. In this state, the surface of the third portion 53 is perpendicular to the short-side direction Y. In this state, the third portion 53 is disposed on the other side of the first portion 51 in the vertical direction Z. For example, in Figure 8, the third portion 53 is disposed below the first portion 51 in the vertical direction Z.

In addition, a first through-hole 50H2 is formed in the third portion 53 in the short-side direction Y.

Next, the attachment of the solar panel 40 to the beam 30 via the connector 50 will be explained using Figure 8. Figure 8 is an enlarged perspective view of portion B in Figure 4. In other words, Figure 8 is an explanatory diagram showing the attachment of the solar panel 40 to the beam 30 via the connector 50 in the solar power generation device 10 shown in Figure 1.

Using the second bolt (second fastener) Bo2 and second nut Nu2 of the second fastening device, the worker first inserts the second bolt (second fastener) Bo2 into the first through-hole 50H2 and the second through-hole 40H, and then attaches the connector 50 to the solar panel 40 by screwing the second bolt Bo2 into the second nut Nu2.

Next, using the first bolt (first fastener) Bo1 and first nut Nu1 of the first fastening device, the worker inserts the first bolt (first fastener) Bo1 into the third through hole 50H1 and the fourth through hole 31H2, and then screws the first bolt Bo1 into the first nut Nu1, thereby attaching the solar panel 40 to the beam 30 via the connector 50.

Conventional solar power generation systems are installed in vacant lots or on the roofs of buildings such as residential buildings, with the light-receiving surface facing south. More specifically, the solar panels of conventional solar power generation systems are installed so that the angle between the solar panel surface (light-receiving surface) and the horizontal plane HF is between 5 and 30 degrees, with the light-receiving surface facing south. For this reason, the peak power generation of the solar panels of conventional solar power generation systems occurs around noon on clear days. Because solar panels in solar power generation systems installed throughout Japan are generally installed in this manner, the power grid approaches saturation around noon on clear days. Therefore, electricity around noon on clear days has little value to the power grid.

On the other hand, in the solar power generation device 10 according to this embodiment, the solar panel 40 is installed so that the first light-receiving surface 40F1 faces due east, and therefore the peak of solar power generation on the first light-receiving surface 40F1 occurs around sunrise. Also, in the solar power generation device 10 according to this embodiment, the solar panel 40 is installed so that the second light-receiving surface 40F2 faces due west, and therefore the peak of solar power generation on the second light-receiving surface 40F2 occurs around sunset. Therefore, the peak power generation of the solar panel 40 of the solar power generation device 10 according to this embodiment occurs around sunrise and sunset, which is different from the peak power generation of the solar panel 40 of a conventional solar power generation device 10. As a result, the solar power generation device 10 according to this embodiment can improve the value of power generation by the solar panel 40 in the power grid.

The solar power generation device 10 according to the present embodiment described above includes a plurality of pillars 20 arranged at intervals in the longitudinal direction X and erected on the ground GR, and a solar panel 40 arranged between the plurality of pillars 20, with a light-receiving surface 40F1 formed on at least one surface, and generating electricity from sunlight on the light-receiving surface 40F1. The plurality of pillars 20 support the solar panel 40 so that the light-receiving surface 40F1 faces east or west. Therefore, the peak power generation of the solar panel 40 of the solar power generation device 10 according to the present embodiment occurs around sunrise and sunset, which is a different time period from the peak power generation of the solar panel 40 of a conventional solar power generation device 10. As a result, the solar power generation device 10 according to the present embodiment can improve the value of power generation by the solar panel 40 in the power grid.

Furthermore, in the solar power generation device 10 according to this embodiment, the solar panel 40 is capable of generating electricity from sunlight on one side, the first light-receiving surface 40F1, and is also capable of generating electricity from sunlight on the other side, the second light-receiving surface 40F2. Therefore, in the solar power generation device 10 according to this embodiment, for example, the power generation peaks around sunrise on the first light-receiving surface 40F1, and the power generation peaks around sunset on the second light-receiving surface 40F2. This allows the daily power generation amount of the solar power generation device 10 to be increased.

The solar power generation device 10 according to this embodiment also includes a beam 30 extending along the longitudinal direction X and connecting two pillars 20 in the longitudinal direction X, a connector 50 connecting the beam 30 to the solar panel 40, a second bolt (second fastener) Bo2 inserted into a first through hole 50H2 passing through the connector 50 in the lateral direction Y and a second through hole 40H passing through the solar panel 40 in the lateral direction Y, and a first bolt (first fastener) Bo1 inserted into a third through hole 50H1 passing through the connector 50 in the lateral direction Y and a fourth through hole 31H2 passing through the beam 30 in the lateral direction Y.

In a conventional solar power generation device 100, as shown in FIG. 11 , a worker first forms a through-hole 200H through the column 200. Then, holding a fixture 401 with a through-hole 400H formed in it, a rail 402 with a U-shaped cross section is attached to the solar panel 400 with a bolt bo11. The worker then inserts the tip of a bolt Bo10 into the through-holes 200H and 400H and screws the bolt Bo10 into a nut Nu10. For this reason, in a conventional solar power generation device 100, the extension direction of the bolt Bo10 is perpendicular to the direction in which wind load is applied to the solar panel 400, and therefore there is a risk that the bolt Bo10 will break due to the shear stress generated in the bolt Bo10 due to the wind load.

On the other hand, with the solar power generation device 10 according to this embodiment, the configuration as described above allows the extension direction of the first fastener Bo1 to coincide with the direction in which wind load is applied to the solar panel 40, thereby reducing the risk of the first fastener Bo1 breaking due to shear stress generated in the first fastener Bo1 due to the wind load. Furthermore, with the solar power generation device 10 according to this embodiment, the configuration as described above allows the extension direction of the second fastener Bo2 to coincide with the direction in which wind load is applied to the solar panel 40, thereby reducing the risk of the second fastener Bo2 breaking due to shear stress generated in the second fastener Bo2 due to the wind load.

Each pillar 20 has a first member 21 arranged below in the vertical direction Z and a second member 22 arranged above the first member 21 in the vertical direction Z. The first member 21 and the second member 22 are formed so that the rigidity of the first member 21 in the longitudinal direction X is greater than the rigidity of the second member 22 in the longitudinal direction X, and the first member 21 is buried in the ground.

It further includes a third bolt (third fastener) Bo3 that is inserted into the fifth through hole 224H that penetrates the second member 22 in the short direction Y and the sixth through hole 31H1 that penetrates the beam 30 in the short direction Y.

The multiple pillars 20 are erected so that the intersection angle between the axis 20z of each pillar 20 and the horizontal plane HF is 90 degrees.

As shown in FIG. 1, the solar power generation device 10 according to this embodiment is a vertical type in which the axes 20z of the multiple pillars 20 are arranged perpendicular to the horizontal plane HF. Therefore, in the solar power generation device 10 according to this embodiment, snow accumulates only on the uppermost portions 20U of the multiple pillars 20 and the upper surface 30U of the beam 30 located at the topmost position in the vertical direction Z, as shown in FIG. 9. Therefore, snow hardly accumulates on the first light-receiving surface 40F1 (see FIG. 12) and the second light-receiving surface 40F2 of the solar panel 40, minimizing the amount of snow that accumulates on the pillars 20 and beams 30. Therefore, the solar power generation device 10 according to this embodiment can minimize the increase in load (load burden) due to snow accumulation, thereby reducing the risk of collapse due to snow accumulation. Therefore, the solar power generation device 10 according to this embodiment can expand the land area where it can be installed in areas with heavy snowfall, such as along the Sea of Japan. FIG. 9 is a perspective view of the solar power generation device 10 shown in FIG. 1.

As shown in Figures 1 and 9, the solar power generation device 10 of this embodiment comprises a plurality of pillars 20 arranged at intervals in the longitudinal direction X and erected on the ground GR, and solar panels 40 arranged between the plurality of pillars 20, each having a light-receiving surface 40F1 formed on at least one surface, and generating electricity from sunlight on the light-receiving surface 40F1. In the installed state, the angle of the light-receiving surface 40F1 relative to the axis 20z of the pillar 20 is constant, and the solar panels 40 are non-movable. Therefore, compared to movable solar power generation devices of the prior art, the solar power generation device 10 of this embodiment can reduce the risk of failure due to the complex drive mechanism.

As shown in FIG. 10 , in the solar power generation device 10 according to this embodiment, the beam 30 has a second routing space 30S, which is an internal space. Cables electrically connected to the solar panels 40 are inserted through the second routing space 30S. The number and/or location of cables in the solar power generation device 10 varies depending on the number of solar panels 40, the interconnection of multiple devices 10, the type of system, and other factors. In the solar power generation device 10 according to this embodiment, the beam 30 has the second routing space 30S for inserting cables electrically connected to the solar panels 40. Therefore, the structure of the solar power generation device 10 provides sufficient space for inserting multiple cables, thereby enabling it to accommodate a variety of cable storage requirements. Furthermore, the solar power generation device 10 according to this embodiment eliminates the need to secure cables to the beam 30 and/or the columns 20 with cable ties or the like, thereby simplifying installation of the solar power generation device 10. This reduces the risk of poor cable connection or damage due to improper cable installation. On the other hand, in conventional solar power generation systems where the beam 30 does not have a second routing space 30S for inserting cables electrically connected to the solar panel 40, the installation of cable ties to secure the cables at appropriate intervals is required, which complicates the installation of the solar power generation system and increases the risk of poor cable connections and cable damage due to improper cable routing. Figure 10 is a cross-sectional view taken along the arrows D-D in Figure 9.

In addition, in the solar power generation device 10 according to this embodiment, the solar panel 40 is attached to the beam 30 via a connector 50 so that the solar panel 40 cannot rotate or move.

In the solar panel 40 according to the embodiment described above, the solar panel 40 is positioned so that the first light receiving surface 40F1 faces due east and the second light receiving surface 40F2 faces due west. However, the solar panel 40 according to this embodiment is not limited to this. For example, the solar panel 40 according to this embodiment may be positioned so that the first light receiving surface 40F1 faces east, slightly offset from due east, and the second light receiving surface 40F2 faces west, slightly offset from due west.

Furthermore, in the solar power generation device 10 according to the embodiment described above, the solar panel 40 is described as being capable of generating electricity from sunlight on one side, the first light-receiving surface 40F1, and also capable of generating electricity from sunlight on the other side, the second light-receiving surface 40F2. However, the solar panel 40 according to this embodiment is not limited to this. For example, the solar panel 40 according to this embodiment only needs to have a light-receiving surface on at least one side that is capable of generating electricity from sunlight. In this case, the solar power generation device 10 has multiple pillars 20 that support the solar panel 40 so that the light-receiving surface (40F1) faces east or west.

Furthermore, in the solar power generation device 10 according to the above-described embodiment, the pillar 20 has been described as having an intersection angle θ1 between the axis 20z of the pillar 20 and the horizontal plane of 90 degrees. However, the pillar 20 according to this embodiment is not limited to this. For example, the pillar 20 according to this embodiment includes pillars in which the intersection angle θ1 between the axis 20z of the pillar 20 and the horizontal plane is within the range of approximately 90 degrees (i.e., roughly 90 degrees).

Furthermore, in the solar power generation device 10 according to this embodiment, as shown in FIG. 6 , a gap is provided in the short-side direction Y between the opposing portion 212a of the first member 21 and the first opposing portion 222a of the second member 22, and a gap is provided between the opposing portion 212b of the first member 21 and the first opposing portion 222b of the second member 22. However, the solar power generation device 10 according to this embodiment is not limited to this. For example, although not shown, the second member 22 may be attached to the first member 21 by bringing the opposing portion 212a of the first member 21 into contact with the first opposing portion 222a of the second member 22 and bringing the opposing portion 212b of the first member 21 into contact with the first opposing portion 222b of the second member 22 in the short-side direction Y. By attaching the second member 22 to the first member 21 in this way, the contact area between the first member 21 and the second member 22 is increased, thereby increasing the design pressure resistance against wind in the direction Y in which wind load is applied to the solar panel 400 (specifically, the short side direction).

Furthermore, the solar power generation device 10 according to this embodiment supports a solar panel 40 that generates a relatively large amount of electricity, and therefore the solar panel 40 is supported by multiple pillars 20. Therefore, the solar power generation device according to this embodiment does not include a solar panel that generates a small amount of electricity and is supported by a single pillar.

Furthermore, the solar power generation device 10 according to this embodiment is electrically connected to, for example, a power company's power transmission grid in order to buy and sell electricity generated by sunlight using the solar panel 40. Therefore, an independent solar power generation device that is not electrically connected to a power company's power transmission grid is not included in the solar power generation device according to this embodiment.

In addition to the materials described in this specification, various known materials commonly used in this type of product may be used without restriction for the components that make up the solar power generation device of the present invention. Furthermore, in the specification and claims, terms such as "first," "second," "third," "fourth," "fifth," and "sixth" are used simply to distinguish between similar elements, positions, etc.

10 Photovoltaic power generation device 20 Pillar 21 First member 22 Second member 224H Fifth through hole 30 Beam 30S Second wiring space (internal space)
31H1 Sixth through hole 31H2 Fourth through hole 40 Solar panel 40F1 First light receiving surface (light receiving surface)
40F2 Second light receiving surface 40H Second through hole 50 Connector 50H1 Third through hole 50H2 First through hole Bo1 First bolt (first fastener)
Bo2 Second bolt (second fastener)
Bo3 Third bolt (third fastener)
GR: Ground plane HF: Horizontal plane X: Longitudinal direction Y: Short direction Z: Vertical direction θ1: Intersection angle between the axis 20z of the pillar 20 and the horizontal plane

Claims (5)

a plurality of pillars arranged at intervals in a longitudinal direction and erected on the ground;
a solar panel disposed between the plurality of pillars, the solar panel having a light-receiving surface formed on at least one surface thereof, the solar panel generating electricity from sunlight on the light-receiving surface;
Equipped with
the plurality of pillars support the solar panels so that the light-receiving surfaces face east or west;
It is electrically connected to the power company's power grid,
Each of the pillars
a first member disposed below in the up-down direction;
a second member disposed above the first member in the up-down direction;
and
the first member and the second member are formed such that the rigidity of the first member in the longitudinal direction is greater than the rigidity of the second member in the longitudinal direction;
The first member is buried in the ground,
The first member is
extending in the vertical direction,
A cross section crossing the vertical direction is formed in a substantially H-shape,
a base portion formed in a flat plate shape; and a pair of opposing portions disposed on both ends of the base portion, formed in a flat plate shape, and opposing each other in a short-side direction perpendicular to the up-down direction and the longitudinal direction,
The second member is
extending in the vertical direction,
The cross section of the housing is generally C-shaped,
The device includes at least a base portion formed in a flat plate shape, and a pair of first opposing portions disposed on both ends of the base portion, formed in a flat plate shape, and opposing each other in the short-side direction perpendicular to the up-down direction and the long-side direction,
a plurality of through holes are formed in the base portion of the first member, the through holes penetrating the base portion in a longitudinal direction, and the plurality of through holes are arranged along a vertical direction;
a plurality of through holes are formed in the base portion of the second member, the through holes penetrating the base portion in a longitudinal direction, and the plurality of through holes are arranged along a vertical direction;
a tip end of a bolt is inserted into the through hole of the first member and the through hole of the second member, and the first member is connected to the second member by screwing the bolt and a nut together;
a solar power generation device characterized in that the second member is connected to the first member in a state in which, at a region where a plurality of through holes are formed in the base portion of the first member and a region where a plurality of through holes are formed in the base portion of the second member overlap, one of the pair of opposing portions is in contact with one first opposing portion of the pair of first opposing portions, and the other of the pair of opposing portions is in contact with the other first opposing portion of the pair of first opposing portions. the light receiving surface is a first light receiving surface,
The solar panel is
The first light receiving surface on one side is capable of generating electricity from sunlight,
The solar power generation device according to claim 1 , wherein the other surface is a second light-receiving surface capable of generating electricity from sunlight. a beam extending along the longitudinal direction and connecting two columns in the longitudinal direction;
a connector that connects the beam and the solar panel;
a first fastener inserted into a first through hole that penetrates the connector in a short direction intersecting the longitudinal direction and a second through hole that penetrates the solar panel in the short direction;
a second fastener inserted into a third through hole penetrating the connector in the short direction and a fourth through hole penetrating the beam in the short direction;
The solar power generation device according to claim 1 or 2, further comprising: 2. The solar power generation device according to claim 1, further comprising a third fastener inserted into a fifth through hole that penetrates the second member in the short direction and a sixth through hole that extends along the longitudinal direction and penetrates a beam that connects two pillars in the long direction in the short direction . The beam has an internal space,
The photovoltaic power generation device according to claim 3 , wherein a cable electrically connected to the solar panel is inserted into the internal space.