JP2014195056A - Solar battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery device with excellent workability.SOLUTION: A solar battery device 1 comprises: a solar battery module 2 having a solar battery panel 15; a cover member 25 covering an upper side of one end (an eaves side end 2c or a ridge side end 2d) of the solar battery module 2; a rail member 24 supporting a lower side of the end of the solar battery module 2; and a fastening member 26 having a bolt 26a for fixing the cover member 25 to the rail member 24 and a nut 26b in which a shaft part of the bolt 26a is inserted. The cover member 25 has: a bolt shaft insertion part 25c for inserting a shaft part 26a2 of the bolt 26a; and a rotation restraining part 25a that is communicated with the bolt shaft insertion part 25c, in which a head 26a1 of the bolt 26a or the nut 26b can be inserted, and that restrains rotation of the head 26a1 of the bolt 26a or the nut 26b. The rail member 24 has a bolt hole part 24e through which the shaft part 26a2 of the bolt 26a penetrates.

Description

  The present invention relates to a solar cell device including a solar cell module.

  With the recent increase in environmental protection, solar power generation using a solar cell device provided with a solar cell module has attracted attention. The solar cell device is composed of a solar cell module that performs photoelectric conversion, a gantry for fixing the solar cell module, and electrical equipment such as an inverter for taking out output from the solar cell module.

  In particular, a facility in which a large number of solar cell devices are installed intensively and the output is about 1 megawatt or more is called a mega solar. Mega solar is required to construct a large number of solar cell devices with low cost, short construction period, and high quality.

  In order to perform such construction, the ease of assembly when attaching the solar cell module to the gantry is an important factor.

  As an example of a conventional solar cell device, a bolt hole is provided in an inward flange portion provided below the frame of the solar cell module, and the base, bolt and nut are tightened together using the bolt hole of the flange portion. The structure to do can be mentioned. However, in the case of the solar cell device having such a structure, since the gap around the flange portion is narrow, work is difficult and workability is poor.

  Then, the solar cell apparatus which improved the workability which installs a solar cell module in a mount frame is proposed (for example, refer the following patent document 1).

JP 2011-236648 A

  The technique disclosed in Patent Document 1 has a structure in which an outer flange portion is provided outwardly from the lower side of the frame of the solar cell module, and a part of the gantry supports the outer flange portion with the outer flange portion interposed therebetween. In addition, the operation | work which fixes a solar cell module to a mount requires fastening of the volt | bolt from the light-receiving surface side of a solar cell module.

  When each solar cell device becomes large like mega solar and adjacent solar cell modules are arranged close to each other, work is done by turning the hand from the lower side to the light receiving surface side of the solar cell module It is not easy. Therefore, it is necessary for an operator to work on the solar cell device. Furthermore, in order to increase the power generation amount of the solar cell module, it is common to install the solar cell module at an inclination.

  However, when an operator tries to work on a slanted solar cell module and tighten it with bolts and nuts, the workability is poor because it is slippery and may fall.

  Moreover, when an operator puts his / her feet on the solar cells of the solar cell module by mistake, there is a risk that the solar cells will crack and the output of the solar cell module will be reduced.

  Furthermore, as disclosed in Patent Document 1, when combining a solar cell module having a frame for a specific application provided with an outer flange portion and a pedestal that engages with the outer flange portion, various types of customers are required. It does not necessarily match the solar cell device having the function and the size of the solar cell module. In order to produce a solar cell module that meets customer demands, design changes and process switching are required, resulting in lower productivity.

  From the above, it is important to improve the workability and productivity of the solar cell device.

  In view of the above problems, the main object of the present invention is to provide a solar cell device excellent in productivity and workability.

  A solar cell device according to an embodiment of the present invention includes a solar cell module having a solar cell panel, a cover member that covers an upper side of one end of the solar cell module, and a lower side of the one end of the solar cell module. A rail member for supporting, a bolt for fixing the cover member to the rail member, and a fastening member having a nut for inserting a shaft portion of the bolt. A bolt shaft insertion portion that inserts the shaft portion, and a bolt shaft insertion portion that communicates with the bolt shaft insertion portion, the head portion of the bolt or the nut can be inserted, and rotation of the head portion of the bolt or the nut is suppressed. The rail member has a bolt hole portion through which the shaft portion of the bolt penetrates.

  According to the solar cell device having the above configuration, the rotation of the bolt head or the nut is suppressed by the rotation suppression portion of the cover member, thereby rotating the nut or the bolt arranged on the lower side of the rail member. The fastening operation can be easily and quickly performed from below.

  Thereby, an operator can perform construction in a safe and easy posture, and workability is improved.

  In particular, in a solar cell module provided with a frame, workability can be improved without providing a special projecting portion or the like on the frame, so that the productivity of the solar cell module can be increased. As a result, the solar cell apparatus excellent in productivity and workability can be provided.

FIG. 1 is a view showing an embodiment of a solar cell device according to the present invention, FIG. 1 (a) is a perspective view, and FIG. 1 (b) is a partially exploded view of FIG. 1 (a). It is a disassembled perspective view shown. 2 is a diagram showing an example of a solar cell module constituting one embodiment of the solar cell device according to the present invention, and FIG. 2 (a) is a plan view of the solar cell module as seen from the light receiving surface side. FIG. 2B is a sectional view taken along line AA ′ in FIG. FIG. 3 is a view showing an embodiment of a solar cell device according to the present invention, FIG. 3 (a) is an exploded perspective view showing an enlarged B part of FIG. 1 (b), and FIG. ) Is a cross-sectional view showing a cross section taken along the line CC ′ of FIG. FIG. 4 is a view showing an embodiment of the solar cell device according to the present invention, and is a cross-sectional view showing a state in which a portion B of FIG. 1 is constructed. 5 is a drawing showing another embodiment of the solar cell device according to the present invention, FIG. 5 (a) is an exploded perspective view showing a portion corresponding to FIG. 3 (a), and FIG. 5 (b). FIG. 4 is a cross-sectional view showing a portion corresponding to FIG. FIG. 6 is a drawing showing another embodiment of the solar cell device according to the present invention, and is an exploded perspective view showing the construction sequence of the part corresponding to FIG. FIG. 7 is a drawing showing another embodiment of the solar cell device according to the present invention, and is an exploded perspective view showing a portion corresponding to FIG. FIG. 8 is a drawing showing another embodiment of the solar cell device according to the present invention, and is a cross-sectional view showing a portion corresponding to FIG.

  An embodiment of a solar cell device according to the present invention will be described with reference to the drawings. In the following description, the light receiving surface is parallel to the light receiving surface of the solar cell module 2 constituting the solar cell device 1 according to the embodiment of the present invention, and the light receiving surface is inclined with respect to the installation surface P such as the ground or a horizontal surface. The direction perpendicular to the inclined direction is taken as the X-axis direction. A direction parallel to the light receiving surface and parallel to the tilt direction is defined as a Y-axis direction, and a direction perpendicular to the light receiving surface is defined as a Z-axis direction. Further, in the Z-axis direction, the + Z direction is referred to as the upper side or the upper side, and the −Z direction is referred to as the lower side or the lower side.

  Moreover, in FIG. 1 etc., the downward direction in the inclination direction of the solar cell apparatus 1 is called eaves side, and the upper direction in the inclination direction is called the ridge side. Each drawing is schematically shown, and the size and positional relationship of each component can be changed as appropriate.

<Basic configuration of solar cell device>
Hereinafter, the basic configuration of the solar cell device 1 will be described with reference to FIGS. 1 to 3.

  The solar cell device 1 includes, for example, a column member 22 (22a, 22b) disposed on a foundation 21 (21a, 21b) disposed on an installation surface P, as illustrated in FIG. And a structural member 23 supported on the upper part of the structure.

  As shown in FIG. 3A, the upper surface 23 a of the structural member 23 is inclined with respect to the installation surface P and is an arrangement surface of the rail member 24. The plurality of rail members 24 are arranged in parallel to each other from the top to the bottom of the inclined arrangement surface. In the present embodiment, the first rail member 241 is disposed on the eave side (−Y direction side), and the second rail member 242 is disposed on the ridge side (+ Y direction side).

  For example, as shown in FIGS. 2 (a) and 2 (b), both end portions in the Y-axis direction of the solar cell module 2 having the solar cell panel 15 are located below the two rail members 24 arranged in parallel to each other. The side is supported. In this embodiment, in the solar cell module 2 supported by being inclined, a portion located on the eave side (−Y direction side) referred to as the roof is referred to as an eave side end portion 2c for convenience, and the ridge side referred to as the roof ( The portion located on the + Y direction side) is referred to as a ridge side end 2d for convenience.

  And the eaves side edge part 2c and the ridge side edge part 2d of the solar cell module 2 are covered and fixed with the cover member arrange | positioned above the rail member 24. FIG. In the present embodiment, the first cover member 251 is disposed on the eave side (−Y direction side), and the second cover member 252 is disposed on the ridge side (+ Y direction side).

As described above, the solar cell device 1 includes the solar cell module 2 having the solar cell panel 15 and the cover member 25 that covers the upper side of one end portion (eave side end portion 2c or ridge side end portion 2d) of the solar cell module 2. A rail member 24 that supports the lower side of the one end of the solar cell module 2, a bolt 26a for fixing the cover member 25 to the rail member 24, and a shaft portion of the bolt 26a, as will be described later. And a fastening member 26 having a nut 26b into which 26a2 is inserted. As will be described in detail later, the cover member 25 communicates with the bolt shaft insertion portion 25c into which the shaft portion 26a2 of the bolt 26a is inserted, and the bolt shaft insertion portion 25c. A nut 26b can be inserted, and the head 26a1 of the bolt 26a or a rotation suppressing portion 25a that suppresses the rotation of the nut 26b is included, and the rail member 24 is a bolt hole through which the shaft portion 26a2 of the bolt 26b passes. It has a part 24e.

<First Embodiment>
A first embodiment according to the present invention will be described. First, specific examples of each element constituting the solar cell device 1 shown in FIG. 1 will be described in detail.

<Solar cell module>
As shown in FIGS. 2A and 2B, the solar cell module 2 includes an aggregate formed by electrically connecting a plurality of solar cell elements 12 to each other. The solar cell module 2 includes, for example, a super straight structure in which light is incident from the substrate side on which the solar cell element 12 is disposed, a double glass structure in which the solar cell element is surrounded by a glass substrate, or light from the opposite side of the substrate. Various structures such as a substrate structure on which light is incident can be selected. In particular, the super straight structure shown in FIG. 2 is easy to apply to a solar cell using crystalline silicon.

  Therefore, in this embodiment, an example of a solar cell module having a super straight structure will be described.

  As shown in FIGS. 2A and 2B, the solar cell module 2 includes a translucent substrate 11 and a plurality of solar cell elements 12 arranged at predetermined positions with respect to the translucent substrate 11, The solar cell panel 15 is configured by laminating a filler 13 for protecting the periphery of the solar cell elements 12 and a back surface protection member 14. Here, the solar cell panel 15 has a light receiving surface 15a corresponding to a surface on which light is mainly incident, and a back surface 15b positioned on the back side of the light receiving surface 15a.

  The translucent substrate 11 has a function of protecting the solar cell element 12 and the like from the light receiving surface 15a side. As such a translucent board | substrate 11, tempered glass or white plate glass etc. can be used, for example.

  The solar cell element 12 has a function of converting incident light into electricity. Such a solar cell element 12 includes, for example, a semiconductor substrate made of single crystal silicon or polycrystalline silicon, and electrodes provided on the front surface (upper surface) and the back surface (lower surface) of the semiconductor substrate. Such a solar cell element 12 has, for example, a quadrangular shape in plan view. At this time, the size of one side of the solar cell element 12 is, for example, 100 to 200 mm.

  In such a solar cell element 12, for example, of the adjacent solar cell elements 12, an electrode located on the surface of one solar cell element 12 and an electrode located on the back surface of the other solar cell element 12 are wired. It is electrically connected with a material (inner lead). Thereby, the several solar cell element 12 is arranged so that it may be connected in series. As such a wiring material, for example, a copper foil coated with solder can be used.

In addition, the kind in particular of the solar cell element 12 is not restrict | limited. For example, a thin-film solar cell element in which the photoelectric conversion portion in the solar cell element is made of a material such as amorphous silicon, CIGS or other chalcopyrite or CdTe may be employed. As the above-described thin-film solar cell element, for example, a glass substrate on which a photoelectric conversion layer made of amorphous silicon, CIGS, CdTe, or the like, a transparent electrode, and the like are appropriately stacked can be used. Such a thin-film solar cell element is obtained by patterning and integrating the photoelectric conversion layer and the transparent electrode on a glass substrate. Therefore, in the thin film solar cell element, a wiring material for connecting a plurality of photoelectric conversion layers can be eliminated. Furthermore, the solar cell element 12 may be of a type in which a thin film of amorphous silicon is formed on a single crystal or polycrystalline silicon substrate.

  The filler 13 provided on both main surface sides of the solar cell element 12 has a function of sealing the solar cell element 12. As such a filler 13, for example, a thermosetting resin such as an ethylene vinyl acetylate copolymer can be used.

  The back surface protection member 14 has a function of protecting the solar cell element 12 and the like from the back surface 15b side. Such a back surface protection member 14 is bonded to the filler 13 located on the back surface 15 b side of the solar cell panel 15. As the back surface protection member 14, for example, PVF (polyvinyl fluoride), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), or a laminate of these appropriately selected can be used.

  Moreover, as shown in FIG. 2, the frame member 16 may be provided in the peripheral part of the solar cell panel 15 of the solar cell module 2. As shown in FIG. Note that the solar cell module 2 may be a frameless type without a frame at the peripheral edge of the solar cell panel 15.

  The frame member 16 has a function of holding the solar cell panel 15. The frame member 16 is a long member that reinforces the outer periphery of the solar cell panel 15. The frame member 16 has a fitting portion 16a, a frame upper side 16b, a frame lower side 16c, and a frame side surface 16d. The fitting portion 16 a is a portion that fits with the solar cell panel 15. The frame upper side 16b is a surface located on the side that receives sunlight. The frame lower side 16c is a surface located on the back side of the frame upper side 16b. The frame side surface 16d connects the frame upper side 16b and the frame lower side 16c, and faces the outside.

  Such a frame member 16 can be manufactured, for example, by extruding aluminum.

<Stand>
The gantry 3 supports the solar cell module 2. As shown in FIG. 1, the gantry 3 is provided on a foundation 21 arranged on an installation surface P such as the ground. A column member 22 is erected on each foundation 21. For example, the first pillar member 22a is arranged on the plurality of first foundations 21a supporting the eaves side, arranged at a certain interval from the first foundation 21a, and on the second foundation 21b supporting the building side. The second pillar member 22b is disposed at the top. Further, a structural member 23 is constructed on the first pillar member 22a on the eaves side and the second pillar member 22b on the ridge side. A plurality of rail members 24 are arranged in parallel between the structural members 23 arranged side by side. At this time, the longitudinal direction of the rail member 24 is substantially orthogonal to the longitudinal direction of the structural member 23. A plurality of rail members 24 are arranged in parallel at substantially the same interval as the width of the solar cell module 2.

<Basic>
The foundation 21 has a function as a foundation of the solar cell device 1. As such a foundation 21, for example, a foundation in which a rectangular parallelepiped concrete is embedded in soil can be used. At this time, when the ground is soft, the width of the bottom of the foundation 21 may be widened to reduce the contact pressure. When such a foundation 21 is used, since it is supported by the ground with a wide area at the bottom of the foundation 21, the distortion of the solar cell device 1 due to the uneven settlement of the foundation 21 can be reduced. Thereby, damage etc. of solar cell module 10 are reduced. In addition to the rectangular parallelepiped foundation 21, a long cloth foundation may be used. By using a long fabric foundation, the ground pressure against the ground can be further reduced, so that the uneven settlement is reduced.

  In addition, as the foundation 21, you may use the screw pile which is a kind of stainless steel friction pile, for example. The screw pile is provided with a spiral wing on the outer periphery of a pile body having a circular cross section, and has improved circumferential friction and pulling resistance. By using such a friction pile for the foundation 21, the pulling resistance when the wind pressure in the blowing direction is applied to the solar cell device 1 is increased, so that the strength of the solar cell device 1 can be increased.

<Column member>
The column member 22 is disposed on the foundation 21 such that the longitudinal direction is perpendicular to the installation surface P. The 1st pillar member 22a is arranged on the 1st foundation 21a located in the eaves side, and the 2nd pillar member 22b is arranged on the 2nd foundation 22b located in the ridge side. As shown in FIG. 1, the first pillar member 22 a and the second pillar member 22 b support the eaves side and the ridge side of the structural material 23.

  The column member 22 has, for example, a cross-sectional shape similar to a capital letter I type or H type. Such a column member 22 can be formed, for example, by extrusion molding of an aluminum alloy.

<Structural materials>
The structural material 23 is a member constructed on the column member 22 so as to be inclined with respect to the installation surface P. Further, the rail member 24 is fixed on the structural material 23 arranged side by side so as to be substantially orthogonal to the longitudinal direction of the structural material 23. The cross-sectional shape of the structural member 23 is, for example, a substantially square pipe shape. The upper surface 23a of the structural member 23 is an arrangement surface on which the rail member 24 is arranged. Such a structural material 23 can be formed, for example, by extrusion molding of an aluminum alloy.

<Rail member>
As shown in FIGS. 1 and 3, the rail members 24 are arranged on the upper surface 23 a of the structural member 23 in parallel with each other with the X-axis direction as the longitudinal direction. The distance between the rail members 24 in the Y-axis direction is substantially the same as the length of the solar cell module 2 in the Y-axis direction. The rail member 24 may be a long body having an elongated shape, for example. Although the dimension in the longitudinal direction (X-axis direction) of the rail member 24 can be suitably selected according to the dimension and material of the solar cell module 2, for example, the dimension in the X-axis direction of one to a plurality of solar cell modules 2 It may be the same. In the present embodiment, as shown in FIG. 1A, the dimension of the rail member 24 in the longitudinal direction is twice the dimension of the solar cell module 2 in the X-axis direction.

  In the present embodiment, the rail member 24 has a substantially hat-shaped cross-sectional shape. The rail member 24 includes a support portion 24a, a bottom portion 24b, a flange portion 24c, a flat surface portion 24d, and a bolt hole portion 24e.

  The support portion 24a is a surface that abuts and supports the frame lower side 16c of the solar cell module 2 provided on both sides of the rail member 24 in the Y-axis direction, and extends along the X-axis direction. Hereinafter, the support portion 24a located on the ridge side (+ Y direction) of the rail member 24 is referred to as a first support portion 24a1, and the support portion 24a located on the eave side (−Y direction) is referred to as a second support portion 24a2. . The first support portion 24a1 may be provided with an inclined surface 24a11 that inclines in the -Z direction as it goes in the -Y direction.

  The planar portion 24d is a planar portion located between the first support portion 24a1 and the second support portion 24a2 when viewed in the Y-axis direction. The planar portion 24d is the highest part when viewed in the z-axis direction.

  The bolt hole portion 24e is provided in the flat surface portion 24d and has a size that allows at least a shaft portion 26a2 of a bolt 26a of the fastening member 26 described later to pass therethrough.

  Further, the bottom 24b of the rail member 24 is a portion that contacts the upper surface 23a of the structural member 23, and is located below the support 24a.

  As shown in FIG. 3, the hook-shaped portion 24 c is a hook-shaped portion that protrudes in the Z-axis direction on both sides of the bottom portion 24 b in the Y-axis direction. The hook-like portion 24 c can be connected to a stopper 27 that is fastened to the structural member 23 with a bolt, a nut, or the like.

  Such a rail member 24 can be formed by, for example, stainless roll molding or aluminum alloy extrusion molding.

<Cover member>
As shown in FIGS. 1 and 3, the cover member 25 is disposed on the rail member 24 with the X-axis direction as the longitudinal direction. The cover member 25 may be a long body having an elongated shape, for example. Although the dimension in the longitudinal direction (X-axis direction) of the cover member 25 can be selected as appropriate, the dimension may be such that the solar cell module 2 is partially locked shorter than the rail member 24, or the rail member 24. It may be the same size as. In the present embodiment, as shown in FIG. 1, the dimension of the cover member 25 in the longitudinal direction is shorter than that of the rail member 24 and is the same dimension as the dimension of the single solar cell module 2 in the X-axis direction.

  In the present embodiment, the cover member 25 has an elongated and substantially plate shape. The cover member 25 includes a rotation suppressing portion 25a, a main body portion 25b, a bolt shaft insertion portion 25c, and a locking portion 25d.

  The rotation suppressing portion 25a is two protrusions having opposing surfaces provided on the upper surface (+ Z direction) of the main body portion 25b of the cover member 25. The opposing surfaces of the rotation suppressing portion 25a have an interval for sandwiching the opposite side of the head portion 26a1 of the bolt 26a of the fastening member 26 described later. The bolt 26a has its head portion 26a1 inserted into the rotation suppression unit 25a and is clamped by the rotation suppression unit 25a, whereby the rotation of the bolt 26a is suppressed.

  The bolt shaft insertion portion 25 c has an opening that penetrates the main body portion 25 b of the cover member 25. The bolt shaft insertion portion 25b has a size that allows at least the shaft portion of the bolt 26a of the fastening member 26 to be inserted.

  The locking portion 25d is a portion that comes into contact with and locks the frame upper side 16b of the solar cell module 2 provided on both sides of the main body portion 25b in the Y-axis direction. The locking portion 25d can cooperate with the support portion 24a of the rail member 24 to sandwich the frame upper side 16b and the frame lower side 16c of the solar cell module 2 and fix the solar cell module 2.

  Such a cover member 25 can be formed by extrusion molding of an aluminum alloy, for example.

<Fastening member>
The fastening member 26 includes at least a bolt 26a and a nut 26b. If necessary, a flat washer or a spring washer may be used.

The bolt 26a is a polygonal head portion 26a1 including a convex polygonal shape in which all inner angles are smaller than 180 ° when viewed in plan from a direction orthogonal to the central axis of the shaft portion 26a2, and has opposite sides. Things can be used. For example, convex polygonal hexagon bolts or square bolts may be used. As the nut 26b, a nut that matches the diameter of the bolt 26a can be appropriately selected and used.

  As such a fastening member 26, for example, a stainless steel member can be used.

<Construction method>
Next, a method for fixing the solar cell module 2 will be described with reference to FIG.

  First, as shown in FIG. 4A, the ridge-side end 2d of the first solar cell module 2a is placed on the second support 24a2 of the first rail member 241 located on the eaves side on the inclined surface. To do.

Next, as shown in FIG. 4B, the first cover member 251 is attached to the flat portion 24 d of the first rail member 241. The first cover member 251 is placed on the flat surface portion 24d of the first rail member 241 in a state where the shaft portion 26a2 of the bolt 26a is inserted into the bolt shaft insertion portion 25b, and the shaft portion 26a2 of the bolt 26a is placed in the first portion. The rail member 241 is inserted into the bolt hole 24e. At this time, the cover member 25 is preferably lifted from below the + Y direction of the first rail member 241 on which the solar cell module 2 is not placed and placed on the first rail member 241. And the nut 26b is attached to the axial part 26a2 of the volt | bolt 26a which protruded below the 1st rail member 241. FIG. The nut 26b may be temporarily tightened, or may be finally tightened after all the solar cell modules 2, the rail member 24, and the cover member 25 are attached.

  Next, as shown in FIG. 4C, the second solar cell module 2 b is lifted from between the first rail member 241 and the second rail member 242. Then, the eaves-side end 2c of the second solar cell module 2b is inserted between the first rail member 241 and the first cover member 251 along the inclined surface 24a11 of the first support portion 24a1.

  Next, as shown in FIG. 4D, the ridge side end 2 d of the second solar cell module 2 b is placed on the second support portion 24 a 2 of the second rail member 242. Then, the nut 26b is finally tightened from below the first rail member 241, the first cover member 251 is fixed to the first rail member 241, the ridge side end 2d of the first solar cell module 2a, and the second solar cell module The eaves side end 2c of 2b is fixed.

  Hereinafter, returning to the procedure of attaching the first cover member 251 to the first rail member 241, the ridge side end 2d of the second solar cell module 2b is similarly fixed to the second rail member 242.

  In addition, this invention is not restricted to what was mentioned to this embodiment, It can change suitably and can utilize.

  For example, the solar cell module is not limited to one having a frame, and a frameless solar cell module without a frame can also be suitably used.

  Further, the bolt 26a of the fastening member 26 is not limited to the form in which the bolt 26a is positioned above the nut 26b, and the positional relationship between the bolt 26a and the nut 26b in the Z-axis direction may be reversed. In this case, the nut 26b is inserted into the rotation suppressing portion 25a of the cover member 25, and the opposite side is sandwiched to suppress the rotation. In the case of such a structure, when the nut 26b is viewed in a plan view from a direction orthogonal to the central axis, a polygonal shape having opposite sides may be used. On the other hand, the head 26a1 of the bolt 26a does not have to be polygonal, and for example, a pan head or a flat head may be used.

The cover member 25 is provided with a structure having a rotation suppressing portion 25a that can insert and hold the opposite side of the head portion 26a1 of the bolt 26a to suppress rotation, so that a fastening member is formed from below the solar cell device 1. The operation of finally tightening the nuts 26b of 26 can be performed.

  An operator can perform an operation of fastening the fastening member 25 by standing on the installation surface P or using a stepladder or the like on the installation surface P. Thereby, since a scaffold can be ensured easily, it can work safely and can improve workability.

  Moreover, since the rotation suppression part 25a is the shape integrally provided in the cover member 25, while being able to suppress a number of parts, the working time required for an assembly can be shortened.

  Furthermore, since the solar cell device 1 of this embodiment does not have a special shape such as a protrusion for engagement with the frame 16 of the solar cell module 2, the productivity of the solar cell module 2 is high.

Second Embodiment
The solar cell device 1 according to the second embodiment of the present invention is different from the first embodiment in the structure of the rail member 24 and the cover member 25. In the solar cell device 1 according to the second embodiment, the cover member 25 can be more easily fixed to the rail member 24, and the weight is reduced.

  As shown in FIGS. 5A and 5B, in the present embodiment, the bolt hole portion 24e of the rail member 24 is located below (−Z direction) between the first support portion 24a1 and the second support portion 24a2. Is located.

  And the cover member 25 has the extending | stretching part 25e extended below (-Z direction) rather than the solar cell panel 15 from the main-body part 25b, and the rotation suppression part 25a and the volt | bolt axis insertion part 25c in the lower end part of the extending | stretching part 25e. Have More specifically, the rotation suppression portion 25a and the bolt shaft insertion portion 25c constitute a C-shaped groove that opens downward. The rotation suppression portion 25a is a wider portion on the back side (Z direction side) than the opening of the C-shaped groove, and the bolt shaft insertion portion 25c is narrower than the rotation suppression portion 25a and is an opening portion on the −Z direction side. It is.

  The extending portion 25e has a length that allows the bolt hole portion 24e and the bolt shaft insertion portion 25c to contact each other when the rail member 24 and the cover member 25 are combined.

  Thus, since the rail member 24 can reduce the step in the Z-axis direction when the bottom 24b and the flat portion 24d are viewed from below, it is easy for an operator to put a hand from below the rail member 24 to work. Thereby, the workability which attaches the nut 26b to the axial part 26a2 of the volt | bolt 26a from the downward direction of the rail member 24 can be improved.

  In the present embodiment, the extending portion 25e is provided in the cover member 25, and the bolt hole portion 24e of the rail member 24 and the bolt shaft insertion portion 25c of the cover member 25 are in contact with each other. Thereby, it is possible to reduce the loosening of the fastening member 26 due to the influence of thermal expansion and thermal contraction due to temperature change.

  This point will be described in detail. If there is a gap between the bolt hole portion 24e and the bolt shaft insertion portion 25c, when the fastening member 26 is tightened, the rail member 24 and the cover member 25 are slightly bent within the elastic range, and due to a difference in temperature between day and night. The fastening member 26 may loosen due to repeated fluctuations in the reaction force with respect to the fastening force. On the other hand, according to the present embodiment, if the bolt hole portion 24e and the bolt shaft insertion portion 25c are in contact with each other, the fluctuation of the reaction force can be reduced and the looseness of the fastening member 26 can be reduced. Can do.

  Further, the cover member 25 has convex engaging portions 25f below both side surfaces of the main body portion 25b in the Y-axis direction, and the rail member 24 has an engaging portion of the cover member 25 at the inner end of the support portion 24a. It has a recessed engaged portion 24f that can engage with 25f. Thereby, the cover member 25 is firmly latched with respect to the Y-axis direction on the rail member 24, and it is suppressed that the solar cell module 2 moves to the Y-axis direction at the time of construction and after construction.

  The dimension of the cover member 25 in the X-axis direction is shorter than that of the rail member 24, and the solar cell module 2 is partially locked at a plurality of locations. In the present embodiment, the cover member 25 fixes the corners of the solar cell module 2. Thus, since the cover member 25 may be shorter than the rail member 24, weight reduction can be achieved.

  Further, as shown in FIG. 5 (b), in the present embodiment, since the void portion 24j is provided in the vicinity of the eave side (−Y direction) of the flat portion 24d of the rail member 24, the void portion 24j. Even if rainwater or the like falls, it can flow from the void portion 24i to the outside. In the present embodiment, the top 25h of the cover member 25 has a mountain shape having an inclined surface, so that dust and the like are not easily collected. Furthermore, since the hollow part 25g is provided in the upper part of the cover member 25, not only the intensity | strength of a cover member can be raised but weight reduction can be achieved.

<Third Embodiment>
The solar cell device 1 according to the third embodiment of the present invention is different from the second embodiment in the shape of the bolt hole portion 24e of the rail member 24.

  As shown in FIGS. 6A and 6B, the bolt hole portion 24e of the rail member 24 has a shape in which the first round hole 24e1 and the first long hole 24e2 along the X-axis direction are combined. The first round hole 24e1 has a larger diameter than the head 26a1 of the bolt 26a, and the width of the first long hole 24e2 in the short direction (Y-axis direction) is larger than the diameter of the shaft portion 26a2. Thus, the bolt hole portion 24e of the rail member 24 has the first round hole 24e1 that is provided continuously to the first long hole 24e2 and through which the head portion 26a1 of the bolt 26a passes. When a washer is attached to the bolt 26a, the diameter of the first round hole 24e1 is preferably larger than that of the washer. When the washer is attached to the nut 26b, the width of the first long hole 24e2 in the Y-axis direction may be smaller than the diameter of the washer of the nut 26b.

  Moreover, although it is the same as that of 2nd Embodiment, the cover member 25 has a C-shaped cross section which consists of the rotation suppression part 25a and the bolt shaft insertion part 25b, and head 26a1 of the bolt 26a from the X-axis direction. Can be inserted.

  In this embodiment, by providing such a structure, the fastening member 26 can be easily attached from below the rail member 24. More specifically, as shown in FIG. 6B, the cover member 25 is placed on the rail member 24, and the bolt 26 a is first moved in the + Z direction, and the head portion 26 a 1 is moved to the first circle of the rail member 24. The hole 24e1 is inserted. Next, the head 26a1 of the bolt 26a is inserted into the rotation suppressing portion 25a and the bolt shaft insertion portion 25c of the cover member 25 from the X axis direction while shifting the bolt 26a along the first long hole 24e2 in the X axis direction. Then, the bolt 26 a is tightened by the nut 26 b to fix the cover member 25 to the rail member 24. By such a series of operations, the fastening member 26 can be easily and quickly attached from below the rail member 24.

  According to this embodiment, since the attaching operation of the fastening member 26 can be easily and quickly performed from below, the workability can be further improved.

  Further, the present embodiment is not limited to the application to the rail member 24 and the cover member 25 having the structure shown in FIGS. 6A and 6B, and may be used for the structure shown in FIG. 7, for example. .

  In the solar cell device 1 shown in FIG. 7, the bolt hole portion 24e of the rail member 24 is composed of the first round hole 24e1 and the first long hole 24e2, and similarly, the bolt insertion portion 25c of the cover member 25 is the second bolt insertion portion 25c. This is a modification example comprising a round hole 25c1 and a second elongated hole 25c2. That is, also in such a solar cell apparatus 1, since the attachment operation | work of the fastening member 26 can be performed easily and rapidly from the downward direction, workability | operativity can be improved more. In the case of the solar cell device 1 shown in FIG. 7, with the cover member 25 placed on the rail member 24, first, the bolt 26 a is moved in the + Z direction, and the head portion 26 a 1 is moved to the first round hole 24 e 1 of the rail member 24. And the second round hole 25c1 of the cover member 25. Next, the bolt 26 a is shifted in the + X direction along both the first long hole 24 e 2 of the rail member 24 and the second long hole 25 c 2 of the cover member 25. Thereafter, the cover member 25 is fixed to the rail member 24 by tightening with the nut 26b and the bolt 26a in a state where the rotation of the bolt 26a is suppressed by the rotation suppressing portion 25a of the cover member 25.

<Fourth embodiment>
The solar cell device 1 of the fourth embodiment according to the present invention is different from the first to third embodiments in the structure of the rail member 24 and the cover member 25.

  As shown in FIG. 8, the rail member 24 is opened upward (in the + Z direction) along the ridge side end 2d of the first solar cell module 2a at the eaves side with respect to the flat portion 24d. It further has a bag 24g. Similarly to the third embodiment, the dimension of the cover member 25 in the X-axis direction is shorter than that of the rail member 24, and the solar cell module 2 is partially fixed at a plurality of locations using the plurality of cover members 25. To do.

  According to this embodiment, the rainfall on the solar cell device 1 is collected in 24 g of water. Accordingly, rainwater is drained from the flat surface portion 24d where the fastening member 26 is located, and the fastening member 26 is hardly corroded. The collected rainwater may be used for cleaning the solar cell device 1 and the like.

  Further, the cover member 25 includes a filter member 24h provided at an opened portion of the flange 24g, that is, an upper end (+ Z direction) of the flange 24g. The filter member 24h is made of, for example, a stainless steel wire mesh, a polypropylene nonwoven fabric, or a laminate of stainless steel wire mesh and a polypropylene nonwoven fabric. As a result, the filtered water 28 flows in the basket 24g, and clogging with foreign matters such as sand mud is reduced.

  Furthermore, the rail member 24 has a wall portion 24i that protrudes longer than the bolt hole portion 24e (in the + Z direction) on the eaves side outside the opening portion of the flange 24g. By providing the wall portion 24i to a position higher than the bolt hole portion 24e, the filter member 24h is clogged, and when the rainwater 29 is not introduced into the gutter 24g, the rainwater 29 is discharged outside the rail member 24. It can be drained.

  In addition, this invention is not restricted to what was mentioned in embodiment, It can change suitably and can utilize. For example, the longitudinal direction of the rail member does not necessarily have to be parallel to the X-axis direction, and may be arranged in parallel to the Y-axis direction.

1: solar cell device 2: solar cell module 2a: first solar cell module 2b: second solar cell module 2c: eaves side end 2d: ridge side end 3: mount 11: translucent substrate 12: solar cell element 13: Filler 14: Back surface protection member 15: Solar cell panel 15a, 15a1: Light receiving surface 15b: Back surface (non-light receiving surface)
16: Frame member 16a: Fitting portion (first frame engaging portion)
16b: frame upper side 16c: frame lower side 16d: frame side surface 21: foundation 21a: first foundation 21b: second foundation 22: pillar member
22a: first pillar member 22b: second pillar member 23: structural material
23a: upper surface 24: rail member 241: first rail member 242: second rail member 24a: support portion 24a1: first support portion 24a11: inclined surface 24a2: second support portion 24b: bottom portion 24c: bowl-shaped portion 24d: plane Portion 24e: Bolt hole portion 24e1: First round hole 24e2: First long hole 24f: Engaged portion 24g: Spear 24h: Filter member 24i: Wall portion 25: Cover member 251: First cover member 252: Second cover Member 25a: Rotation suppression part 25b: Main body part 25c: Bolt shaft insertion part 25c1: Second round hole 25c2: Second long hole 25d: Locking part 25e: Extending part 25f: Engaging part 26: Fastening member
26a: bolt 26a1: head portion 26a2: shaft portion 26b: nut 27: stopper 28: water

Claims (9)

A solar cell module having a solar cell panel;
A cover member covering the upper side of one end of the solar cell module;
A rail member that supports the lower side of the one end of the solar cell module;
A bolt for fixing the cover member to the rail member, and a fastening member having a nut for inserting a shaft portion of the bolt,
The cover member is in communication with the bolt shaft insertion portion for inserting the shaft portion of the bolt, and the bolt shaft insertion portion, and the head portion of the bolt or the nut can be inserted into the head portion of the bolt. Or a rotation suppressing portion that suppresses rotation of the nut,
The rail member has a bolt hole portion through which the shaft portion of the bolt penetrates.
Solar cell device.   The head portion of the bolt has a polygonal shape in plan view, and the rotation suppression portion of the cover member sandwiches the opposite side of the polygonal shape of the head portion, and the bolt that penetrates the bolt hole portion. The solar cell device according to claim 1, wherein the shaft portion is fastened with the nut from the outside of the bolt hole portion.   The solar cell device according to claim 2, wherein the bolt shaft insertion portion includes an opening that is narrower than the rotation suppression portion.   The said cover member further has an extending | stretching part extended below rather than the lower surface of the said solar cell panel, The said bolt shaft insertion part and the said rotation suppression part are provided in this extending | stretching part, The any one of Claim 1 thru | or 3 A solar cell device according to any one of the above.   5. The solar cell device according to claim 1, wherein the bolt hole portion of the rail member has a long hole along the one end portion of the solar cell module.   The solar cell device according to claim 5, wherein the bolt hole portion of the rail member has a round hole that is provided continuously to the elongated hole and through which a head portion of the bolt passes.   The solar cell device according to any one of claims 1 to 6, wherein the cover member further includes a ridge that opens upward along the one end portion of the solar cell module.   The solar cell device according to claim 7, wherein a filter member that restricts mixing of foreign matters is provided in the opening of the bag.   9. The solar cell device according to claim 7, further comprising a wall portion that protrudes longer than the bolt hole portion outside the opening of the flange.