JP6128943B2 - Earth plate and solar cell module - Google Patents

Description

  The present invention relates to a ground plate and a solar cell module.

  When installing a solar power generation device (solar cell module), it is necessary to fix the solar cell module with such a strength that it can withstand the mass of the installation equipment, the wind pressure in the installation area, an earthquake, and the like. For example, when installing a solar cell module on a roof, a method of fixing a fixing bracket for fixing the solar cell module on the roof in advance and fixing the solar cell module on the fixing bracket is common. .

  Moreover, when installing a solar cell module on the ground, a method is generally used in which a concrete foundation is formed on the ground, a base made by combining steel materials is assembled thereon, and the solar cell module is fixed to the base.

  In addition to securing such fixed strength, it is necessary to ground the solar cell module to protect it from lightning strikes and high applied voltages. For example, Patent Document 1 discloses a technique for grounding by connecting a fixed metal fitting fixed on a roof or a stand assembled on the ground and a solar cell module to each other through a ground wire. Yes. Note that the ground wire is fixed to the solar cell module and the fixing bracket by screwing.

Japanese Patent Laid-Open No. 2000-1000049

  However, in grounding using a grounding wire, the work of screwing and connecting the grounding wire for each solar cell module occurs separately from the fixing work, so it is likely to increase the installation cost and forget to fix the grounding wire. There was a problem.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the earth plate which can earth | ground a solar cell module more reliably, suppressing installation cost.

  In order to solve the above-described problems and achieve the object, the present invention provides a flat plate portion made of a metal having a first surface and a second surface facing in opposite directions and having a polygonal shape, and a flat plate portion. Are formed integrally with the first protrusion protruding from the corner of the first surface to the side facing the first surface, and the flat portion is formed integrally with the second surface from the corner of the second surface. And a through hole penetrating between the first surface and the second surface is formed in the flat plate portion.

  According to the present invention, it is possible to obtain an earth plate that can more reliably ground the solar cell module while suppressing the installation cost.

FIG. 1 is a perspective view of the solar cell module according to Embodiment 1 of the present invention, and shows a state where a frame portion is disassembled. FIG. 2 is a partially enlarged cross-sectional view of a fixing portion for fixing the solar cell module. 3 is a cross-sectional view taken along the arrow C shown in FIG. FIG. 4 is a plan view of the ground plate. FIG. 5 is a cross-sectional view taken along line AA shown in FIG. 6 is a cross-sectional view taken along line BB shown in FIG.

  Below, the earth plate and solar cell module concerning embodiment of this invention are demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
It is a perspective view of the solar cell module concerning Embodiment 1 of this invention, Comprising: It is a figure which shows the state which decomposed | disassembled the flame | frame part. The solar cell module 50 includes a solar cell panel 1 formed by resin-sealing a plurality of solar cells 60 arranged vertically and horizontally, and a frame 2 that surrounds the outer edge of the solar cell panel 1 over the entire circumference.

  FIG. 2 is a partial enlarged cross-sectional view of a fixing portion for fixing the solar cell module 50. 3 is a cross-sectional view taken along the direction of arrow C shown in FIG. The solar cell module 50 is used by being fixed to a fixture 5 fixed on the roof or on the ground. The fixture 5 is manufactured using a metal such as aluminum.

  The frame 2 has a frame-side through hole 2a. The fixture 5 is formed with a fixture-side through hole 5 a for fixing the frame 2. The solar cell module 50 is disposed on the fixture 5 so that the frame side through hole 2a and the fixture side through hole 5a overlap. Then, the solar cell module 50 is fixed to the fixture 5 by the bolts 20 and the nuts 21 inserted into the frame-side through hole 2a and the fixture-side through hole 5a in an overlapped state.

  A ground plate 4 is sandwiched between the frame 2 and the fixture 5. FIG. 4 is a plan view of the earth plate 4. FIG. 5 is a cross-sectional view taken along line AA shown in FIG. 6 is a cross-sectional view taken along line BB shown in FIG.

  The earth plate 4 includes a flat plate portion 10 made of metal, for example, an aluminum plate, a stainless plate, or a phosphor bronze plate. The flat plate part 10 has the 1st surface 10a which exhibits a polygonal shape, and the 2nd surface 10b. The first surface 10a and the second surface 10b face in opposite directions. In the first embodiment, description will be given by taking as an example the flat plate portion 10 in which the first surface 10a and the second surface 10b have a square shape.

  The flat plate portion 10 is formed with a plate-side through hole (through hole) 10c through which the shaft portion of the bolt 20 passes. The ground plate 4 is sandwiched between the frame 2 and the fixture 5 with the shaft portion of the bolt 20 passing through the plate-side through hole 10c.

  A plurality of protrusions (first protrusion 11, second protrusion 12, third protrusion 13, and fourth protrusion 14) are formed on the flat plate portion 10. The first protrusions 11 are formed at the corners of the first surface 10a. In the present embodiment, the first protrusions 11 are formed at one of the two diagonals of the first surface 10a having a square shape. The first protrusion 11 is formed by bending a corner portion of the flat plate portion 10 to the side where the first surface 10a faces.

  By bending the corner portion of the flat plate portion 10 to form the first protrusion 11, the flat plate portion 10 and the first protrusion 11 are integrally formed. By forming the corner portion of the flat plate portion 10 by bending, the first protrusion 11 has a sharp shape that becomes narrower toward the tip. The height of the first protrusion 11 is twice or more the thickness of the flat plate portion 10.

  The second protrusions 12 are formed at the corners of the second surface 10b. In the present embodiment, the second protrusion 12 is formed on one of the two pairs of diagonals of the second surface 10b having a square shape. The second protrusion 12 is formed by bending the corner portion of the flat plate portion 10 to the side where the second surface 10b faces.

  By bending the corner portion of the flat plate portion 10 to form the second protrusion 12, the flat plate portion 10 and the second protrusion 12 are integrally formed. By bending the corner portion of the flat plate portion 10 to form the second protrusion 12, the second protrusion 12 has a sharp shape that becomes narrower toward the tip. The height of the second protrusion 12 is at least twice as high as the thickness of the flat plate portion 10.

  In addition, the corner where the first protrusion 11 is formed and the corner where the second protrusion 12 is formed are in a position that does not overlap in plan view. That is, of the corners of the first surface 10a, the corners that are opposite to each other where the first protrusions 11 are not formed are bent toward the side where the second surface 10b faces to form the second protrusions 12. . Further, of the corners of the second surface 10b, diagonal corners where the second protrusions 12 are not formed are bent toward the side where the first surface 10a faces to form the first protrusions 11. .

  The 3rd protrusion 13 is formed inside the outer periphery among the 1st surface 10a, and protrudes in the side which the 1st surface 10a faces. The third protrusion 13 is formed integrally with the flat plate portion 10. The fourth protrusion 14 is formed on the inner side of the outer periphery of the second surface 10b and protrudes to the side where the second surface 10b faces. The fourth protrusion 14 is integrally formed with the flat plate portion 10. The heights of the third protrusion 13 and the fourth protrusion 14 are at least twice as high as the thickness of the flat plate portion 10.

  The ground plate 4 is sandwiched between the frame 2 and the fixture 5 so that the first projection 11 and the second projection 12 bite into the frame 2 and the fixture 5. Further, the third protrusion 13 and the fourth protrusion 14 are in close contact with the frame 2 and the fixture 5. Therefore, the frame 2 and the fixture 5 are conducted through the metal ground plate 4. Here, if the fixture 5 is grounded, the solar cell module 50 is grounded via the frame 2, the earth plate 4, and the fixture 5.

  According to the ground plate 4 described above, when the solar cell module 50 is fixed to the fixture 5, the frame 2 is fixed to the frame 2 so that the frame side through hole 2a, the fixture side through hole 5a, and the plate side through hole 10c overlap. If sandwiched with the tool 5, the solar cell plate can be grounded simultaneously with the operation of fixing the solar cell module 50.

  Therefore, in addition to the fixing work of the solar cell module 50, the grounding cost can be reduced by reducing the number of man-hours compared to the case where the grounding work is performed using the ground wire. Further, compared to the case where the grounding work is performed separately from the fixing work of the solar cell module 50, the forgetting of the work is less likely to occur, and the solar cell module is more reliably grounded.

  Further, since the first protrusion 11 and the second protrusion 12 bite into the frame 2 and the fixture 5, conduction between the frame 2 and the fixture 5 through the ground plate 4 can be achieved more reliably. Further, since the third protrusion 13 and the fourth protrusion 14 are formed in addition to the first protrusion 11 and the second protrusion 12, even if the frame 2 or the fixture 5 is warped or distorted, the frame 2 and the fixture 5 can be brought into close contact with each other so that conduction can be achieved more reliably.

  In addition, since the height of the first protrusion 11, the second protrusion 12, the third protrusion 13, and the fourth protrusion 14 is formed to be twice or more the thickness of the flat plate portion 10, the frame 2 and the fixing tool 5, even if a larger warp or distortion occurs, the frame 2 and the fixture 5 can be brought into close contact with each other so that conduction can be achieved more reliably. Even if the first protrusion 11, the second protrusion 12, the third protrusion 13, and the fourth protrusion 14 are formed at a height smaller than twice the thickness of the flat plate portion 10, An effect of improving the adhesion can be obtained.

  Here, the higher the conductivity of the metal used for the earth plate 4, the higher the grounding effect of the solar cell module 50. The metal conductivity is 61.4 (Ω · m) for silver, 59 (Ω · m) for copper, 45.5 (Ω · m) for gold, 37.4 (Ω · m) for aluminum, and stainless steel 10 (Ω · m). Under such circumstances, in this embodiment, while considering the balance between price and performance, the phosphor bronze plate is considered in consideration of conductivity, the aluminum plate is considered in consideration of rust and conductivity, and the stainless steel plate is considered in terms of resistance to rust. The example used for an earth plate is given. Needless to say, the earth plate may be formed using a metal material different from that described above.

  Further, the polygonal shapes of the first surface 10a and the second surface 10b of the ground plate 4 have been described by taking a rectangular shape as an example, but are not limited thereto. The shape of the first surface 10a and the second surface 10b may be a triangle or a pentagon.

  Further, the shape of the fixture 5 is not limited to that shown in FIG. If the fixture 5 for fixing the solar cell module 50 is made of a grounded metal, the present invention can be applied even if its shape and structure are different. Further, the formation of the first protrusion 11 and the second protrusion 12 is not limited to the bending formation.

  As described above, the ground plate according to the present invention is useful for grounding work when fixing the solar cell module.

  DESCRIPTION OF SYMBOLS 1 Solar cell panel, 2 frame, 2a Frame side through hole, 4 Ground plate, 5 Fixing tool, 5a Fixing tool side through hole, 10 Flat plate part, 10a 1st surface, 10b 2nd surface, 10c Plate side through hole (Through hole), 11 1st protrusion, 12 2nd protrusion, 13 3rd protrusion, 14 4th protrusion, 20 bolt, 21 nut, 50 solar cell module, 60 solar cell.

Claims (7)

A metal flat plate portion having a first surface and a second surface facing in opposite directions and having a polygonal shape;
A first protrusion that is integrally formed with the flat plate portion and protrudes from a corner portion of the first surface toward the first surface;
A second protrusion that is integrally formed with the flat plate portion and protrudes from a corner portion of the second surface toward the second surface;
A third protrusion formed integrally with the flat plate portion and formed on the inner side of the outer periphery of the first surface and projecting to the side facing the first surface;
A fourth protrusion formed integrally with the flat plate portion and formed on the inner side of the outer periphery of the second surface and projecting to the side facing the second surface;
In the flat plate portion, a through hole penetrating between the first surface and the second surface is formed,
The first protrusion and the second protrusion are formed by bending a corner of the first surface and a corner of the second surface,
The ground plate, wherein the third protrusion and the fourth protrusion have a columnar shape. The first surface and the second surface have a square shape;
The first protrusion is formed at two corners of the first surface,
The earth plate according to claim 1, wherein the second protrusion is formed at two corners of the second surface.   3. The ground plate according to claim 1, wherein the first protrusion and the second protrusion have a pointed shape that narrows toward a tip. 4.   4. The ground plate according to claim 1, wherein heights of the first protrusion and the second protrusion are at least twice as high as a plate thickness of the flat plate portion. 5.   5. The ground plate according to claim 1, wherein heights of the third protrusion and the fourth protrusion are at least twice as high as a plate thickness of the flat plate portion.   The earth plate according to any one of claims 1 to 5, wherein the flat plate portion is an aluminum plate, a stainless steel plate, or a phosphor bronze plate. A solar cell module,
A solar panel,
A frame surrounding the periphery of the solar panel;
A fixture to which the frame is fixed;
A ground plate provided between the frame and the fixture;
A bolt for fastening the frame and the fixture;
The ground plate is formed integrally with the flat plate portion, a metal flat plate portion having a first surface and a second surface facing in opposite directions and having a polygonal shape. A first protrusion protruding from the corner to the side facing the first surface, and a second protrusion integrally formed with the flat plate portion and protruding from the corner of the second surface toward the side facing the second surface A protrusion, a third protrusion that is integrally formed with the flat plate portion, is formed on the inner side of the outer periphery of the first surface and protrudes toward the first surface, and is integrally formed with the flat plate portion. And a fourth protrusion formed on the inner side of the outer periphery of the second surface and projecting to the side facing the second surface ,
The third protrusion and the fourth protrusion have a columnar shape,
In the flat plate portion, a through hole penetrating between the first surface and the second surface is formed,
A frame side through hole is formed in the frame,
A fixture side through hole is formed in the fixture,
The frame, the ground plate, and the fixture are arranged such that the frame side through hole, the through hole, and the fixture side through hole overlap.
The solar cell module, wherein the solar cell panel is fixed to the fixture by the bolts inserted into the frame side through hole, the through hole, and the fixture side through hole in an overlapped state.

Images