JP2011035254A - Frame connection structure of solar cell panel, solar cell module and solar cell unit, and method of manufacturing solar cell unit, and technique of assembling solar cell unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide: a connection structure for frames that connects frames between adjacent solar cell panels of a solar cell unit having a plane array of a plurality of solar cell modules each holding a solar cell panel with the frames, the frame connection structure of the solar cell panels being capable of improving strength on the whole solar cell unit; a solar cell module and a solar cell unit; and a method of manufacturing the solar cell unit and technique of assembling the solar cell unit. <P>SOLUTION: In the connection structure for frames that connects frames 21a, 21b between adjacent solar cell panels 20, 20 of the solar cell unit 1 having the plane array of the plurality of solar cell modules 2 each holding a solar cell panel 20 with frames 21a, 21b, the frame connection structure of the solar cell panels being capable of improving strength on the whole solar cell unit, the frames 21a, 21b between the adjacent solar cell panels 20, 20 are engaged with each other so that opposite surfaces 22a, 22b thereof may not move away from each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a connection structure of frames constituting a solar cell module in a solar cell unit.

  A solar cell module is generally composed of a rectangular or square rectangular solar cell panel and a frame that holds the solar cell panel. A plurality of solar cell modules may be arranged in a planar shape to form a solar cell unit. In this case, the frames are adjacent between adjacent solar cell panels in the solar cell unit.

  For example, a solar cell unit having a connection structure in which a concave portion is formed on the opposing surface of one frame and a convex portion is formed on the opposing surface of the other frame between adjacent solar cell panels is disclosed (Patent Document 1 below). (See FIG. 2 etc.).

US Pat. No. 6570084

  However, in such a conventional solar cell unit, the convex portion formed on the opposing surface of the other frame in the concave portion formed on the opposing surface of one frame between the solar cell panels in a direction orthogonal to the opposing surface of the frame. Although the strength in the direction along the frame facing surface of the solar cell unit is improved by being inserted, the convex portion is only inserted in the direction perpendicular to the frame facing surface with respect to the concave portion. The strength in the direction other than the direction along the frame facing surface is not considered, and the actual situation is that the strength of the entire solar cell unit is not improved.

  Accordingly, the present invention provides a frame connection structure for connecting frames between adjacent solar cell panels in a solar cell unit in which a plurality of solar cell modules holding a solar cell panel in a frame are arranged in a plane, and the solar cell unit It aims at providing the frame connection structure of the solar cell panel which can improve the intensity | strength as a whole.

  The present invention also relates to a solar cell module that holds a solar cell panel in a frame and a solar cell unit in which a plurality of the solar cell modules are arranged in a planar shape, and is capable of improving the strength of the entire solar cell unit. It aims at providing a battery module and a solar cell unit.

  Moreover, an object of this invention is to provide the manufacturing method of the solar cell unit which can manufacture the solar cell unit which concerns on this invention satisfactorily in a factory.

  Moreover, this invention aims at providing the assembly method of the solar cell unit which can assemble the solar cell unit which concerns on this invention satisfactorily in installation facilities.

In order to solve the above problems, the present invention provides a frame connection structure according to the following first to third aspects.
(1) Frame connection structure of first aspect A frame connection structure for connecting frames between adjacent solar cell panels in a solar cell unit in which a plurality of solar cell modules holding a solar cell panel in a frame are arranged in a plane. The frame connection structure for solar cell panels, wherein the frames between the adjacent solar cell panels are engaged so that their opposing surfaces do not move in directions away from each other.
(2) Frame connection structure of second aspect A frame connection structure for connecting frames between adjacent solar cell panels in a solar cell unit in which a plurality of solar cell modules holding a solar cell panel in a frame are arranged in a plane. A convex portion having a locking portion that prevents the opposing surfaces of the frames from moving in a direction away from each other is formed on the opposing surface of at least one of the frames between the adjacent solar cell panels. The sun is characterized in that a concave portion that engages with the convex portion is formed on the opposing surface of the counterpart frame connected to the at least one frame on which the convex portion is formed. Battery panel frame connection structure.
(3) Frame connection structure of third aspect A frame connection structure for connecting frames between adjacent solar cell panels in a solar cell unit in which a plurality of solar cell modules holding a solar cell panel in a frame are arranged in a plane. And a connecting member having a pair of protrusions each formed with a locking portion for preventing movement of the opposing surfaces of the frames between the adjacent solar battery panels in a direction away from each other. A frame of a solar cell panel, wherein concave portions that are respectively engaged with the pair of convex portions of the connection member are formed on the facing surfaces of the frames between the solar cell panels. Connection structure.

  The “direction in which the opposing surfaces are separated from each other” in the present invention refers to a direction other than the direction along the opposing surfaces, that is, a direction intersecting the opposing surfaces (preferably a direction orthogonal to the opposing surfaces). ).

  In the frame connection structure according to the first aspect of the present invention, the frames between the adjacent solar cell panels are engaged so as not to move in a direction in which the opposing surfaces are separated from each other (for example, a direction orthogonal to the opposing surface). Therefore, the strength in a direction other than the direction along the frame facing surface of the solar cell unit can be improved.

  In the frame connection structure according to the second aspect of the present invention, the facing surfaces of the frames are separated from each other on the facing surface of at least one of the frames between the adjacent solar battery panels (for example, the The convex portion having the locking portion that prevents movement in the direction orthogonal to the opposing surface is formed, and the concave portion that engages corresponding to the convex portion is formed on the opposing surface of the opposing counterpart frame. The strength in a direction other than the direction along the frame facing surface of the solar cell unit can be improved.

  Further, in the frame connection structure according to the third aspect of the present invention, each frame between the adjacent solar cell panels is prevented from moving in a direction in which the opposing surfaces of the frames are separated from each other (for example, a direction orthogonal to the opposing surface). The connecting member having the pair of protruding ridges formed with the locking portions respectively, and the pair of protruding ridges of the connecting member on the opposing surfaces of the frames between the adjacent solar cell panels. Since the concave portions that engage with each other are formed, the strength in a direction other than the direction along the frame facing surface of the solar cell unit can be improved.

  Thus, according to the frame connection structure of the first to third aspects according to the present invention, the strength in a direction other than the direction along the frame facing surface of the solar cell unit can be improved. The strength of the entire unit can be improved.

  In the frame connection structure according to the second aspect of the present invention, as a specific aspect of the convex portion and the concave portion, the convex portion has a convex portion (for example, a longitudinal direction or a short direction of the facing surface). And the concave portion (which is a concave portion extending along the predetermined direction) is a concave portion that engages with the convex portion corresponding to the convex portion. Can be illustrated.

  In this specific matter and the frame connection structure of the third aspect according to the present invention, since the convex portion is the convex strip portion and the concave portion is the concave strip portion, the connection strength by the concave-convex engagement is improved. Therefore, the strength of the entire solar cell unit can be improved.

  In the frame connection structure according to the second aspect of the present invention, when the convex portion is the convex strip portion and the concave portion is the concave strip portion, each frame between the adjacent solar cell panels is opposed to the opposing portion. By making relative movement in the direction along the surface, the concave and convex engagement can be achieved. Further, in the frame connection structure according to the third aspect of the present invention, each frame between the adjacent solar battery panels is engaged with the connection member in a concave-convex manner by relatively moving in a direction along the facing surface. You can make it.

  In this specific matter, since the respective frames are engaged with each other by moving relative to each other in the direction along the facing surface, the protrusions and the recesses of each frame are smoothly and easily engaged. be able to.

  In this case, each frame between the adjacent solar cell panels may be engaged with each other by moving in the longitudinal direction along the facing surface, or may be engaged in the longitudinal direction along the facing surface. The protrusions and recesses may be engaged with each other by relative movement in the intersecting direction (for example, the short direction). It should be noted that when the respective frames between the adjacent solar cell panels are engaged with each other by moving in a direction crossing the longitudinal direction along the facing surface (for example, the short direction), limited work is required. Even in the space, the protruding ridges and the recessed ridges of each frame can be easily engaged.

  In the frame connection structure according to the second aspect of the present invention, the protrusion is a protrusion extending along the longitudinal direction of the facing surface, and the recess extends along the longitudinal direction of the facing surface. From the viewpoint of commonly using one type of frame, the convex strip portion has the opposite surface 3 in the longitudinal direction when the concave strip portion is engaged with the convex portion corresponding to the convex strip portion. Of the three equally divided regions, one end region is formed partly or entirely along the longitudinal direction from the edge portion, and the concave portion is one end region in the other end region of the three regions of the facing surface. It is preferable that the protrusion is formed at a position corresponding to line symmetry with a center line perpendicular to the center of the opposing surface in the longitudinal direction as the symmetry axis. In this case, it is possible to exemplify a mode in which the frames between the adjacent solar cell panels are engaged with each other by moving relative to each other in the longitudinal direction along the facing surface.

  In this specific matter, the protruding portion is formed in part or all along the longitudinal direction from the edge in the one end region of the three regions, and the concave portion is the other end region of the three regions. In this case, the frame is formed at a position corresponding to line symmetry with the center line as a symmetry axis with respect to the formation position of the ridge portion in the one end region. The part management cost can be reduced.

  In the frame connection structure according to the second aspect of the present invention, the convex portion is a convex strip portion (specifically, a convex strip portion having a substantially L-shaped cross section) extending along the longitudinal direction of the facing surface, The concave portion is a concave strip portion extending along the longitudinal direction of the facing surface and is a concave strip portion that engages with the convex strip portion (specifically, a convex strip portion having a substantially L-shaped cross section). In this case, from the viewpoint of using one type of frame in common, the ridge portion is partially or partially along the longitudinal direction from the edge in one end region of the two regions obtained by equally dividing the opposing surface into the longitudinal direction. It is formed in all, and the above-mentioned concave stripe part is perpendicular to the formation position of the above-mentioned convex stripe part in one end field in the other end field among the above-mentioned two fields of the above-mentioned opposing surface in the center of the longitudinal direction of the above-mentioned counter surface It must be formed at a position corresponding to line symmetry with the center line as the axis of symmetry. Masui. In this case, each frame between the adjacent solar cell panels can be illustrated as an example in which the frames are engaged with each other by moving relative to each other in the short direction along the facing surface.

  In this specific matter, the protruding portion is formed in part or all along the longitudinal direction from the edge in the one end region of the two regions, and the concave portion is the other end region of the two regions. In this case, the frame is formed at a position corresponding to line symmetry with the center line as a symmetry axis with respect to the formation position of the ridge portion in the one end region. The part management cost can be reduced.

In the frame connection structures of the second aspect and the third aspect according to the present invention, the following aspects can be exemplified as specific aspects of the convex line part and the concave line part. That is,
(A) The ridge is a ridge having a substantially T-shaped cross section, and the ridge is a groove that engages with the ridge having a substantially T-shaped cross section. A mode,
(B) The aspect in which the ridge portion is a ridge portion having a wedge-shaped cross section, and the concave portion is a ridge portion that is engaged with the ridge portion having a wedge shape in cross section,
(C) The ridge portion is a ridge portion having a substantially L-shaped cross section, and the recess portion is a ridge portion that engages with the ridge portion having a substantially L-shaped cross section. It is an aspect.

  According to the aspects (a) to (c), it is possible to stably and surely engage the concave and convex portions with the concave and convex portions, thereby improving the strength of the entire solar cell unit. be able to.

  In the frame connection structure according to the second aspect and the third aspect of the present invention, it is preferable that a space for accommodating a cable is provided in the concave portion.

  According to this specific matter, the cable can be stored while saving space in the frame, and thereby the weather resistance of the cable can be improved. Furthermore, when the frame is made of a metal material, it is possible to obtain a shielding effect against high voltage such as lightning.

  The present invention also provides a solar cell module characterized in that a solar cell panel is held by a frame including any one of the frame connection structures according to the first to third aspects of the present invention.

  According to the solar cell module according to the present invention, the solar cell panel is held by the frame having the frame connection structure according to any one of the first to third aspects according to the present invention. Strength can be improved.

  The present invention also provides a solar cell unit in which a plurality of the solar cell modules according to the present invention are arranged in a planar shape while being engaged by the frame connection structure.

  According to the solar cell unit according to the present invention, a plurality of the solar cell modules according to the present invention are arranged in a planar shape in an engaged state with the frame connection structure, so that the strength of the entire solar cell unit is improved. Is possible.

Moreover, this invention also provides the manufacturing method of the solar cell unit of the following 1st aspect and 2nd aspect.
(4) Manufacturing method of solar cell unit of 1st aspect It is a manufacturing method of the solar cell unit which manufactures the solar cell unit which concerns on the said this invention in a factory, Comprising: It is polygonal shape seeing from a plane as these solar cell panels. And at least one frame that holds at least one side of at least two solar cell panels, and the at least one frame is disposed on a corresponding side. A holding step of holding at least two solar cell panels, and a connecting step of connecting the at least one frame holding the at least two solar cell panels in the holding step by engaging each frame connection structure The manufacturing method of the solar cell unit characterized by including these.

According to the method for manufacturing the solar cell unit of the first aspect of the present invention, after holding the at least two solar cell panels so that each of the at least one frame is disposed on a corresponding side, the at least two frames are arranged. Since each said at least 1 frame holding one solar cell panel is engaged by the said frame connection structure, it becomes possible to manufacture the solar cell unit which concerns on the said this invention favorably in a factory.
(5) Manufacturing method of solar cell unit of 2nd aspect It is a manufacturing method of the solar cell unit which manufactures the solar cell unit which concerns on the said invention in a factory, Comprising: It is polygonal shape seeing from a plane as these solar cell panels And at least one frame holding at least one side of at least two solar cell panels, and engaging each of the at least one frame with the frame connection structure. A connecting step of connecting, and a holding step of holding the at least two solar cell panels so that each of the at least one frame connected in the connecting step is disposed on a corresponding side. Manufacturing method of solar cell unit.

  According to the method for manufacturing the solar cell unit of the second aspect of the present invention, after the at least one frame is engaged and connected in the frame connection structure, the connected at least one frame is: Since the at least two solar cell panels are held so as to be arranged on the corresponding sides, the solar cell unit according to the present invention can be satisfactorily manufactured in a factory.

Moreover, this invention also provides the assembly method of the solar cell unit of the following 1st aspect and 2nd aspect.
(6) Assembling method of solar cell unit according to the first aspect A solar cell unit assembling method for assembling the solar cell unit according to the present invention at an installation facility, wherein the solar cell unit has a polygonal shape as viewed from above as a plurality of solar cell panels. Using a solar cell panel, as the frame, using at least one frame holding at least one side of at least two solar cell panels, the at least one frame is disposed on a corresponding side, and A holding step of holding two solar cell panels, and a connecting step of connecting each of the at least one frame holding the at least two solar cell panels in the holding step by engaging the frame connection structure; A method for assembling a solar cell unit, comprising:

According to the assembly method of the solar cell unit of the first aspect of the present invention, after holding the at least two solar cell panels so that each of the at least one frame is disposed on the corresponding side, Since each of the at least one frame holding one solar cell panel is engaged by the frame connection structure, the solar cell unit according to the present invention can be satisfactorily assembled at an installation facility.
(7) Solar cell unit assembly method according to the second aspect A solar cell unit assembly method for assembling the solar cell unit according to the present invention at an installation facility, wherein the plurality of solar cell panels are polygonal when viewed from a plane. Using a solar cell panel, as the frame, using at least one frame holding at least one side of at least two solar cell panels, and connecting each of the at least one frame by the frame connection structure And a holding step of holding the at least two solar cell panels so that each of the at least one frame connected in the connecting step is disposed on a corresponding side. Battery unit assembly method.

  According to the solar cell unit assembly method of the second aspect of the present invention, after the at least one frame is engaged and connected in the frame connection structure, the connected at least one frame is: Since the at least two solar cell panels are held so as to be arranged on the corresponding sides, the solar cell unit according to the present invention can be satisfactorily assembled at the installation facility.

  As described above, according to the frame connection structure of the solar cell panel, the solar cell module, and the solar cell unit according to the present invention, the strength of the solar cell unit as a whole can be improved.

  Moreover, according to the manufacturing method of the solar cell unit which concerns on this invention, the solar cell unit which concerns on this invention can be manufactured favorably in a factory.

  Moreover, according to the assembling method of the solar cell unit according to the present invention, the solar cell unit according to the present invention can be satisfactorily assembled at the installation facility.

It is an external view which shows the state by which the solar cell unit provided with the frame connection structure which concerns on embodiment of this invention was attached to the mount frame. It is a side view of the solar cell unit shown in FIG. It is the perspective view which looked at one solar cell module which comprises the solar cell unit shown in FIG. 1 from the diagonal back side. It is the disassembled perspective view which looked at one solar cell module which comprises the solar cell unit shown in FIG. 1 from the diagonal back side. It is a figure for demonstrating the frame connection structure of 1st Embodiment provided in the 1st and 2nd frame member between adjacent solar cell panels, Comprising: (a) is an exploded perspective view of each frame member. FIG. 4B is a cross-sectional view taken along the line aa in FIG. It is a figure for demonstrating the frame connection structure of 2nd Embodiment provided in the 1st and 2nd frame member between adjacent solar cell panels, Comprising: FIG. (A) is an exploded perspective view of each frame member. FIG. 4B is a cross-sectional view taken along the line bb of FIG. 1A illustrating a state in which the respective frame members are engaged with each other. It is a figure for demonstrating the frame connection structure of 3rd Embodiment provided in the 1st and 2nd frame member between adjacent solar cell panels, Comprising: FIG. (A) is an exploded perspective view of each frame member. FIG. 4B is a cross-sectional view taken along the line cc of FIG. 1A showing a state in which the respective frame members are engaged with each other. It is a figure for demonstrating the flame | frame connection structure of 4th Embodiment provided in the 1st and 2nd frame member between adjacent solar cell panels, Comprising: (a) is an exploded perspective view of each frame member. FIG. 4B is a cross-sectional view taken along the d1-d1 line of FIG. 1A showing a state in which each frame member is engaged with the concave and convex portions, and FIG. It is d2-d2 sectional view taken on the line of figure (a) which shows this. It is a figure for demonstrating the frame connection structure of 5th Embodiment provided in the 1st and 2nd frame member between adjacent solar cell panels, Comprising: FIG. (A) is an exploded perspective view of each frame member. FIG. 4B is a cross-sectional view taken along the line e1-e1 of FIG. 1A showing a state in which each frame member is engaged with the projections and depressions, and FIG. It is the e2-e2 sectional view taken on the line of figure (a) which shows this. It is a figure for demonstrating the frame connection structure of 6th Embodiment provided in the 1st and 2nd frame member between adjacent solar cell panels, Comprising: (a) is an exploded perspective view of each frame member. FIG. 5B is a cross-sectional view taken along the line ff of FIG. 4A showing a state in which the frame members are engaged with each other. It is a figure which shows the frame connection structure of 7th Embodiment provided with the space for accommodating a cable in the frame connection structure of 1st Embodiment, Comprising: FIG. (A) is an exploded perspective view of each frame member. FIG. 4B is a cross-sectional view taken along the line gg of FIG. 1A showing a state in which the respective frame members are engaged with each other. It is a figure which shows the frame connection structure of 8th Embodiment provided with the space for accommodating a cable in the frame connection structure of 6th Embodiment, Comprising: FIG. (A) is an exploded perspective view of each frame member. FIG. 4B is a cross-sectional view taken along the line hh of FIG. 1A showing a state in which the respective frame members are engaged with each other. It is a figure for demonstrating the manufacturing method and assembly method of the solar cell unit of 9th Embodiment, Comprising: FIG. (A) -FIG. (C) is a perspective view which respectively shows a holding process, a connection process, and an attachment process. is there. It is a figure for demonstrating the manufacturing method and assembly method of the solar cell unit of 10th Embodiment, Comprising: FIG. (A) -FIG. (C) is a perspective view which respectively shows a connection process, a holding process, and an attachment process. is there.

  Embodiments according to the present invention will be described below with reference to the drawings. The following embodiments are examples embodying the present invention, and are not of a nature that limits the technical scope of the present invention.

  FIG. 1 is an external view showing a state in which a solar cell unit 1 having a frame connection structure according to an embodiment of the present invention is attached to a gantry 10. FIG. 2 is a side view of the solar cell unit 1 shown in FIG. 3 and 4 are a perspective view and an exploded perspective view, respectively, of one solar cell module 2 constituting the solar cell unit 1 shown in FIG. 1 as viewed from an oblique back side (opposite to the light receiving surface). is there. The frame connection structure according to the embodiment of the present invention is shown in FIGS. 5 to 12 described later, and is not shown in FIGS. 1 to 4.

  A solar cell unit 1 shown in FIG. 1 and FIG. 2 is a plan view of a solar cell module 2 in which the periphery of a solar cell panel 20 is held by first to fourth frame members 21a, 21b, 21c, and 21d as an example of a frame. Multiple arrangements. Here, the first to fourth frame members 21a to 21d are formed of a metal material such as aluminum.

  The solar cell panel 20 has a quadrangular shape (in this case, a rectangular shape) in plan view. A plurality of solar cell panels 20 are arranged one-dimensionally in the vertical direction or the horizontal direction, or two-dimensionally arranged in the vertical direction and the horizontal direction. Here, four solar cell panels 20 are two-dimensionally arranged in the vertical direction and the horizontal direction (2 in the vertical direction × 2 in the horizontal direction).

  As shown in FIG. 4, each solar cell panel 20 has a first side 20a (long side here) held by a first frame member 21a and a second side parallel to the first side 20a. 20b is held by the second frame member 21b. Each solar cell panel 20 has a third side 20c (short side here) orthogonal to the first side 20a held by the third frame member 21c and parallel to the third side 20c. The four sides 20d are held by the fourth frame member 21d.

  Specifically, each of the frame members 21a to 21d includes a frame member main body 211, extends from the outer end of the panel side end surface of the frame member main body 211 to the panel side, and along the panel light receiving surface in the middle. An extended bent piece 212 that is bent inward is provided. Thereby, the groove part 213 by which the outer peripheral edge part of the solar cell panel 20 is engage | inserted between the panel side end surface of the frame member main body 211 and the inner surface of the extension bending piece 212 can be formed.

  In the present embodiment, the solar cell module 2 includes one or more (two in this case) module support members 30 fixed to the first and second frame members 21a and 21b.

  Specifically, a through hole for attaching and fixing the module support member 30 with a fixing member SC such as a screw is provided at the module back side end of the inner side surface of the frame member main body 211 in the first and second frame members 21a and 21b. A fixing rib piece 214 having a hole 214a is formed. The through hole 214 a is provided corresponding to the mounting position of the module support member 30.

  In this example, the module support member 30 is an H-shaped member including a panel-side horizontal plate 31, a back-side horizontal plate 32, and a vertical support plate 33 that supports both horizontal plates. In addition, an I-type or a hollow quadrangular column may be used. Fixing rib pieces 34, 34 for fixing by the fixing member SC are formed at both ends of the module support member 30 on the frame member side of the rear horizontal plate 32. The fixing rib pieces 34, 34 are formed with fixing holes 34a through which the fixing member SC is inserted and fixed. Thereby, the module support member 30 can support the solar cell panel 20 from the back surface by being fixed to the first and second frame members 21a and 21b as shown in FIG.

  Moreover, in this Embodiment, as shown in FIG.1 and FIG.2, the solar cell unit 1 is attached to the mount frame 10. FIG. The gantry 10 includes a holding bar 11 and a support bar 16. Here, the gantry 10 is formed in a “person” shape in a side view. Specifically, the gantry 10 has a direction opposite to that of the holding bar 11 at a point in the longitudinal direction of the holding bar 11 that is disposed obliquely (specifically, around a quarter from the top). It is formed by fixing the front end of the support bar 16 that is inclined at an angle.

  The solar cell unit 1 is attached to a plurality of (here, three) mounts 10 arranged in parallel to each other at positions corresponding to the first and second frame members 21a and 21b.

  That is, the holding bar 11 of the gantry 10 disposed at one end in the horizontal direction, the holding bar 11 of the gantry 10 disposed between the adjacent solar cell modules 2 and 2, and the other end in the horizontal direction. The solar cell module 2 is bridged and attached to the top plate 12 of the holding bar 11 between each frame 10 and the holding bar 11.

  Specifically, the first frame member 21a of the solar cell module 2 arranged at one end in the horizontal direction is mounted and attached to the holding bar 11 of the gantry 10 arranged at one end in the horizontal direction. A second frame member 21b of the solar cell module 2 disposed at the other end portion in the horizontal direction is placed and attached to the holding bar 11 of the gantry 10 disposed at the other end portion in the horizontal direction. Further, the first and second frame members 21a and 21b of the adjacent solar cell modules 2 are mounted and attached to the holding bars 11 of the gantry 10 disposed between the adjacent solar cell modules 2 and 2. . The first and second frame members 21a and 21b may be directly attached to the support bar 16 without the holding bar 11 interposed therebetween.

[Configuration of Features of the Present Invention]
(About frame connection structure)
First, the connection structure of the frame which connects each frame member between the solar cell panels 20 and 20 of the solar cell module 2 adjacent in the solar cell unit 1 is demonstrated below.

  At least one of the first and second frame members between the adjacent solar cell panels 20 and 20 and the third and fourth frame members in the solar cell unit 1 shown in FIGS. The frame connection structure according to the following first to eighth embodiments is detachably engaged with each other so that the opposing surfaces do not move away from each other by the concave and convex portions provided on the opposing surfaces. ing.

  Here, both the opposing surfaces 22a, 22b of the first and second frame members 21a, 21b between the adjacent solar cell panels 20, 20 and the opposing surfaces 22c, 22d of the third and fourth frame members 21c, 21d are both. The frame connection structure according to the embodiment of the present invention is provided. Note that the frame connection structure according to this embodiment may be provided only on the opposing surfaces 22a and 22b of the first and second frame members 21a and 21b between the adjacent solar cell panels 20 and 20, or adjacent to each other. The frame connection structure according to the embodiment of the present invention may be provided only on the opposing surfaces 22c, 22d of the other third and fourth frame members 21c, 21d between the matching solar cell panels 20, 20.

  The frame connection structure provided on the first and second frame members 21a and 21b may be different from the frame connection structure provided on the third and fourth frame members 21c and 21d. Here, they have the same configuration.

  In the following first to eighth embodiments, the description of the frame connection structure provided in the third and fourth frame members 21c, 21d is omitted, and the frame connection provided in the first and second frame members 21a, 21b. The structure will be described as a representative.

(First embodiment)
FIG. 5 is a view for explaining the frame connection structure of the first embodiment provided in the first and second frame members 21a, 21b between the adjacent solar cell panels 20, 20, and FIG. ) Shows an exploded perspective view of each frame member 21a, 21b, and FIG. 5 (b) shows an aa line in FIG. 5 (a) showing a state in which the respective frame members 21a, 21b are engaged with each other. A cross-sectional view is shown.

  In the first embodiment, of the frame members 21a and 21b, the facing surface 22a of one frame member 21a has a direction other than the direction along the facing surface 22a (here, the direction orthogonal to the facing surface 22a). A convex portion 301 having a locking portion 312 ′ that prevents movement of the convex portion 301 is formed, and a concave portion 302 inserted into the convex portion 301 corresponds to the convex portion 301 on the opposing surface 22 b of the other frame member 21 b. Is formed.

  The convex portion 301 is a convex strip extending along the longitudinal direction Y, and the concave 302 is a concave strip extending similarly along the longitudinal direction Y.

  Specifically, the ridge portion 301 is a ridge portion having a substantially T-shaped cross section extending along the longitudinal direction Y. The recess 302 is a recess having a substantially C-shaped cross section extending along the longitudinal direction Y.

  Specifically, the protruding line portion 301 includes a first protruding portion 311 extending along the longitudinal direction Y protruding from the facing surface 22a of one frame member 21a to the outside in the direction Z orthogonal to the facing surface 22a, The front end of the first convex portion 311 includes a second convex portion 312 that is integrally extended on both sides in the lateral direction X of the facing surface 22a so as to be orthogonal to the first convex portion 311. The surface on the facing surface 22a side of the second convex portion 312 is a locking portion 321 '. On the other hand, the concave portion 302 includes a first concave portion 321 into which the first convex portion 311 is fitted inside and a second concave portion 322 into which the second convex portion 312 is fitted in the facing surface 22b of the other frame member 21b. Yes. The protruding line portion 301 and the recessed line portion 302 are formed so that the opposing surfaces 22a and 22b are in close contact with each other so as to be relatively movable in the longitudinal direction Y.

  The frame members 21a and 21b are moved in the longitudinal direction Y along the opposing surfaces 22a and 22b to move in directions other than the longitudinal direction Y (specifically, the short direction X and the separation direction of the frame members). Z) is concavo-convexly engaged so as not to be relatively movable.

  In addition, although the protruding line part 301 and the recessed line part 302 are each made into one thing here, you may be made into two or more things. Moreover, although the protruding item | line part 301 is provided in one frame member 21a and the recessed item part 302 is provided in the other frame member 21b, it replaces with or, in addition, the protruding item | line part 301 is the other frame. It is provided in the member 21b, and the concave stripe part 302 may be provided in one frame member 21a.

  Moreover, you may comprise so that it may not move to the longitudinal direction Y in the state in which each frame member 21a, 21b was connected (for example, a fixing member may be provided).

(Second Embodiment)
FIG. 6 is a view for explaining the frame connection structure of the second embodiment provided on the first and second frame members 21a, 21b between the adjacent solar cell panels 20, 20, and FIG. ) Shows an exploded perspective view of each frame member 21a, 21b, and FIG. 6 (b) shows a state in which the respective frame members 21a, 21b are engaged with each other in a concavo-convex manner, along the line bb in FIG. 6 (a). A cross-sectional view is shown.

  In the second embodiment, of the frame members 21a and 21b, the opposing surface 22a of one frame member 21a has a direction other than the direction along the opposing surface 22a (here, the direction orthogonal to the opposing surface 22a). A convex portion 401 having a locking portion 411 ′ that prevents movement to the concave portion 402 is formed, and a concave portion 402 inserted into the convex portion 401 corresponds to the convex portion 401 on the opposing surface 22 b of the other frame member 21 b. Is formed.

  The convex portion 401 is a convex strip portion extending along the longitudinal direction Y, and the concave portion 402 is a concave strip portion extending similarly along the longitudinal direction Y.

  Specifically, the ridge 401 is a ridge having a wedge-shaped cross section extending along the longitudinal direction Y. The recess 402 is a recess having a wedge-shaped cross section extending along the longitudinal direction Y.

  Specifically, the ridge 401 is a pair extending along the longitudinal direction Y inclined so as to gradually open as it protrudes from the facing surface 22a of one frame member 21a to the outside in the direction Z perpendicular to the facing surface 22a. 1st convex part 411,411 and the 2nd convex part 412 which connects the front-end | tips of this pair of 1st convex part 411,411. An inclined surface on the facing surface 22a side of the first convex portion 411 is a locking portion 411 '. On the other hand, the concave ridge portion 402 includes a first concave portion 421 into which the first convex portion 411 is fitted inside and a second concave portion 422 into which the second convex portion 412 is fitted into the opposing surface 22b of the other frame member 21b. Yes. The ridges 401 and the ridges 402 are formed so that the opposing surfaces 22a and 22b are in close contact with each other so as to be relatively movable in the longitudinal direction Y.

  The frame members 21a and 21b are moved in the longitudinal direction Y along the opposing surfaces 22a and 22b to move in directions other than the longitudinal direction Y (specifically, the short direction X and the separation direction of the frame members). Z) is concavo-convexly engaged so as not to be relatively movable.

  In addition, although the protruding line part 401 and the concave line part 402 are each two here, you may be made into one or three or more things. Moreover, although the protruding item | line part 401 is provided in one frame member 21a and the recessed item part 402 is provided in the other frame member 21b, it replaces with or in addition, the protruding item | line part 401 is the other frame. It is provided in the member 21b, and the concave stripe part 402 may be provided in one frame member 21a.

  Moreover, you may comprise so that it may not move to the longitudinal direction Y in the state in which each frame member 21a, 21b was connected (for example, a fixing member may be provided).

(Third embodiment)
FIG. 7 is a view for explaining the frame connection structure of the third embodiment provided on the first and second frame members 21a, 21b between the adjacent solar cell panels 20, 20, and FIG. ) Shows an exploded perspective view of each frame member 21a, 21b, and FIG. 7 (b) shows a state in which the frame members 21a, 21b are engaged with each other in a concave-convex manner, along the line cc in FIG. 7 (a). A cross-sectional view is shown.

  In the third embodiment, the opposing surfaces 22a and 22b of both the frame members 21a and 21b are directed in a direction other than the direction along the opposing surfaces 22a and 22b (here, a direction orthogonal to the opposing surface 22a). Convex portions 501 and 501 having locking portions 512 ′ and 512 ′ for preventing movement are formed. In addition, concave portions 502 and 502 that are inserted into the convex portions 501 and 501 are formed on the opposing surfaces 22a and 22b of the frame members 21a and 21b, respectively, corresponding to the convex portions 501 and 501.

  The convex portions 501 and 501 respectively formed on the one frame member 21a and the other frame member 21b are convex strips extending along the longitudinal direction Y, and the other frame member 21b and the one frame member 21a The recessed portions 502 and 502 formed respectively are recessed strip portions extending along the longitudinal direction Y in the same manner.

  Here, on the facing surface 22a of the one frame member 21a, the concave strips 502 and the convex strips 501 are alternately formed in this order in the lateral direction X from the module back side (upper side in the figure). On the opposing surface 22b of the other frame member 21b, convex ridges 501 and concave ridges 502 are alternately formed in this order in the lateral direction X from the module back side (upper side in the figure).

  Specifically, the ridges 501 and 501 are ridges having a substantially L-shaped cross section extending along the longitudinal direction Y. The concave portions 502 and 502 are concave portions having an L-shaped cross section extending along the longitudinal direction Y.

  Specifically, the ridges 501 and 501 extend along a longitudinal direction Y protruding from the opposing surfaces 22a and 22b of the frame members 21a and 21b to the outside in the direction Z perpendicular to the opposing surfaces 22a and 22b. One convex portion 511,511 and the short side direction X one side of the opposing surfaces 22a, 22b at the tip of the first convex portion 511,511 at right angles to the first convex portion 511,511 (module surface side (Fig. Middle lower side)) or the other side (module back side (upper side in the figure)) and second convex portions 512 and 512 integrally extending. The surfaces of the second convex portions 512 and 512 on the facing surfaces 22a and 22b side are locking portions 512 'and 512'. On the other hand, the concave portions 502 and 502 are provided with first concave portions 521 and 521 into which the first convex portions 511 and 511 are fitted in the opposing surfaces 22a and 22b of the frame members 21a and 21b, and second convex portions 512 and 512, respectively. It consists of the 2nd recessed part 522,522 which inserts. The protruding line portion 501 and the recessed line portion 502 are formed such that the opposing surfaces 22a and 22b are in close contact with each other so as to be relatively movable in the longitudinal direction Y.

  The frame members 21a and 21b are moved in the longitudinal direction Y along the opposing surfaces 22a and 22b to move in directions other than the longitudinal direction Y (specifically, the short direction X and the separation direction of the frame members). Z) is concavo-convexly engaged so as not to be relatively movable.

  In addition, although the ridge part 501 and the concave line part 502 are each two here, you may be made into one or three or more things. In addition, when there are a plurality of ridges 501 and recesses 502, the second protrusions 512 and the second recesses 522 may face the same direction. Moreover, although the protruding item | line part 501 and the recessed item part 502 are provided in each frame member 21a, 21b, the protruding item | line part 501 is provided only in one frame member 21a or the other frame member 21b, and the recessed item part 502 is provided. May be provided only on the other frame member 21b or one frame member 21a.

  Moreover, you may comprise so that it may not move to the longitudinal direction Y in the state in which each frame member 21a, 21b was connected (for example, a fixing member may be provided).

  In 1st to 3rd embodiment demonstrated above, each frame member 21a, 21b between the adjacent solar cell panels 20 and 20 is made into the protruding item | line part where the protruding item | lines part 301-501 extends along the longitudinal direction Y, And the concave-line part 302-502 is made into the concave-line part extended along the longitudinal direction Y, and uneven | corrugated engagement comes by moving relatively to the longitudinal direction Y along opposing surface 22a, 22b. However, the convex strips 301 to 501 are convex strips extending along the short direction X perpendicular to the longitudinal direction Y, and the concave strips 302 to 502 extend along the short direction X. It may be configured to engage with the concave and convex portions by moving relatively in the lateral direction X along the opposing surfaces 22a and 22b. The same applies to the sixth to eighth embodiments described later.

(Fourth embodiment)
FIG. 8 is a view for explaining the frame connection structure of the fourth embodiment provided on the first and second frame members 21a, 21b between the adjacent solar cell panels 20, 20, and FIG. ) Shows an exploded perspective view of each of the frame members 21a and 21b, and FIG. 8B shows a d1-d1 line in FIG. FIG. 8C shows a cross-sectional view taken along the line d2-d2 of FIG. 8A showing a state in which the frame members 21a and 21b are engaged with the concave and convex portions. In FIG. 8, substantially the same components as those in the first embodiment shown in FIG.

  In the fourth embodiment, the opposing surfaces 22a and 22b of both the frame members 21a and 21b are directed in a direction other than the direction along the opposing surfaces 22a and 22b (here, a direction orthogonal to the opposing surface 22a). Convex portions 301 and 301 having locking portions 312 ′ and 312 ′ that prevent movement are formed. Further, on both opposing surfaces 22a and 22b of the frame members 21a and 21b, concave portions 302 and 302 inserted into the convex portions 301 and 301 are formed corresponding to the convex portions 301 and 301, respectively.

  The convex portions 301 and 301 formed on the frame members 21a and 21b are convex strips extending along the longitudinal direction Y, and the concave portions 302 and 302 formed on the frame members 21a and 21b are similarly It is a concave strip extending along the longitudinal direction Y.

  Further, the ridge 301 formed on one frame member 21a is formed in the longitudinal direction Y from the edge in the one end region α1 among the three regions α1, α2, and α3 obtained by dividing the opposing surface 22a into three in the longitudinal direction Y. It is formed in part or all along (here, over the whole end region α1). Similarly, the ridge portion 301 formed on the other frame member 21b has a longitudinal direction Y from the edge in the one end region α1 among the three regions α1, α2, and α3 obtained by dividing the opposing surface 22b into three in the longitudinal direction Y. Are formed in part or in whole (here, over one end region α1).

  Further, the concave portion 302 formed on one frame member 21a is opposed to the formation position of the convex portion 301 in the one end region α1 in the other end region α3 among the three regions α1, α2, and α3 of the facing surface 22a. It is formed at a position corresponding to line symmetry with a center line β orthogonal to the center in the longitudinal direction Y of the surface 22a as a symmetry axis. Similarly, the concave portion 302 formed on the other frame member 21b is in relation to the formation position of the convex portion 301 in the one end region α1 in the other end region α3 of the three regions α1, α2, and α3 of the facing surface 22b. It is formed at a position corresponding to line symmetry with a center line β orthogonal to the center in the longitudinal direction Y of the facing surface 22b as a symmetry axis. In the second region α2 at the center in the longitudinal direction Y, no ridge or ridge is formed.

  Specifically, the ridge 301 formed in one end region α1 of the facing surface 22a of the one frame member 21a is a ridge having a substantially T-shaped cross section extending along the longitudinal direction Y. The concave portion 302 formed in the other end region α3 of the opposing surface 22a of the one frame member 21a is a concave portion having a substantially C-shaped cross section extending along the longitudinal direction Y. Further, the ridge 301 formed in the one end region α1 of the facing surface 22b of the other frame member 21b is a ridge having a substantially T-shaped cross section extending along the longitudinal direction Y. The concave portion 302 formed in the other end region α3 of the opposing surface 22b of the other frame member 21b is a concave portion having a substantially C-shaped cross section extending along the longitudinal direction Y.

  Specifically, the ridges 301 and 301 extend in the longitudinal direction Y protruding from the facing surfaces 22a and 22b of the frame members 21a and 21b to the outside in the direction Z perpendicular to the facing surfaces 22a and 22b. One convex portion 311, 311, and the first convex portion 311, 311 are integrally extended at both ends of the opposing surfaces 22 a, 22 b in the short direction X so as to be orthogonal to the first convex portion 311, 311. The second convex portions 312 and 312 are included. The opposing surfaces 22a and 22b of the second convex portions 312 and 312 are locking portions 312 'and 312'. On the other hand, the concave ridges 302 and 302 include first concave portions 321 and 321 into which the first convex portions 311 and 311 are fitted inside the opposing surfaces 22a and 22b of the respective frame members 21a and 21b, and second convex portions 312 and 312. It consists of the 2nd recessed parts 322,322 which insert. The protruding line portion 301 and the recessed line portion 302 are formed so that the opposing surfaces 22a and 22b are in close contact with each other so as to be relatively movable in the longitudinal direction Y.

  The frame members 21a and 21b are moved in the longitudinal direction Y along the opposing surfaces 22a and 22b to move in directions other than the longitudinal direction Y (specifically, the short direction X and the separation direction of the frame members). Z) is concavo-convexly engaged so as not to be relatively movable.

  In addition, although the protruding line part 301 and the recessed line part 302 are each made into one thing here, you may be made into two or more things. Moreover, although the protruding item | line part 301 and the recessed item part 302 were set as the protruding item | line part and the recessed item | line part similar to 1st Embodiment shown in FIG. 5, with 2nd and 3rd embodiment shown in FIG.6 and FIG.7, It is good also as a similar convex-line part and a concave-line part.

  Moreover, you may comprise so that it may not move to the longitudinal direction Y in the state in which each frame member 21a, 21b was connected (for example, a fixing member may be provided).

(Fifth embodiment)
FIG. 9 is a view for explaining the frame connection structure of the fifth embodiment provided on the first and second frame members 21a, 21b between the adjacent solar cell panels 20, 20, and FIG. ) Shows an exploded perspective view of each of the frame members 21a and 21b, and FIG. 9B shows an e1-e1 line in FIG. 9A showing a state in which the respective frame members 21a and 21b are engaged with each other. FIG. 9C is a cross-sectional view taken along the line e2-e2 of FIG. 9A showing a state in which the frame members 21a and 21b are engaged with each other. In FIG. 9, the same reference numerals are given to substantially the same components as those in the third embodiment shown in FIG.

  In the fifth embodiment, the opposing surfaces 22a and 22b of both the frame members 21a and 21b are directed in a direction other than the direction along the opposing surfaces 22a and 22b (here, the direction orthogonal to the opposing surface 22a). Convex portions 501 and 501 having locking portions 512 ′ and 512 ′ for preventing movement are formed. In addition, concave portions 502 and 502 that are inserted into the convex portions 501 and 501 are formed on the opposing surfaces 22a and 22b of the frame members 21a and 21b, respectively, corresponding to the convex portions 501 and 501.

  The convex portions 501 and 501 respectively formed on the one frame member 21a and the other frame member 21b are convex strips extending along the longitudinal direction Y, and the other frame member 21b and the one frame member 21a The recessed portions 502 and 502 formed respectively are recessed strip portions extending along the longitudinal direction Y in the same manner.

  In addition, the protruding strip 501 on one end formed on one frame member 21a has one side (X1) in the short side direction X of one end region γ1 of two regions γ1 and γ2 obtained by dividing the opposing surface 22a into two in the longitudinal direction Y ( On the lower side in the figure, the edge portion is formed partly or entirely along the longitudinal direction Y (here, over the entire end region γ1). One or all of the convex strips 501 on the other end side formed on the one frame member 21a from the edge portion along the longitudinal direction Y on the other side (the upper side in the drawing) in the short side direction X of the other end region γ2. (Here, over the entire end region γ1).

  Similarly, the protruding strip 501 on the one end side formed on the other frame member 21b is one side X in the short side direction of the one end region γ1 of the two regions γ1 and γ2 obtained by dividing the opposing surface 22b into two in the longitudinal direction Y. It is formed partly or entirely from the edge part along the longitudinal direction Y (lower side in the figure) (here, over the entire one end region γ1). The other ridge portion 501 formed on the other frame member 21b is partly or entirely from the edge portion along the longitudinal direction Y on the other side region γ2 in the short side direction X on the other side (upper side in the drawing). (Here, over the entire end region γ1).

  Further, the concave stripe portion 502 on the other end side formed on the one frame member 21a is on one side (the lower side in the drawing) in the short direction X of the other end region γ2 of the two regions γ1 and γ2 of the facing surface 22a. It is formed at a position corresponding to line symmetry with a center line β orthogonal to the center of the opposing surface 22a in the longitudinal direction Y with respect to the formation position of the ridge 501 in the one end region γ1. The concave strip 502 on one end formed on one frame member 21a is centered with respect to the formation position of the convex strip 501 in the other end region γ2 on the other side (upper side in the drawing) in the short side direction X of the one end region γ1. It is formed at a position corresponding to line symmetry with the line β as the axis of symmetry.

  Similarly, the concave portion 502 on the other end side formed on the other frame member 21b is one side (lower side in the figure) in the short side direction X of the other end region γ2 of the two regions γ1 and γ2 of the facing surface 22b. In FIG. 4, the center line β is formed at a position corresponding to line symmetry with the center line β orthogonal to the center of the opposing surface 22b in the longitudinal direction Y with respect to the formation position of the ridge 501 in the one end region γ1. The concave stripe portion 502 on one end side formed on the other frame member 21b is centered with respect to the formation position of the convex stripe portion 501 in the other end region γ2 on the other side (upper side in the drawing) in the short side direction X of the one end region γ1. It is formed at a position corresponding to line symmetry with the line β as the axis of symmetry.

  Here, on the facing surface 22a of one frame member 21a, the concave strip portion 502 and the convex strip portion 501 are arranged in this order in the lateral direction X from the module back side (top in the drawing) on one end side (front side in the drawing). And the ridges 501 and 502 are alternately formed in this order in the lateral direction X from the back side of the module (upper side in the figure) on the other end side (rear side in the figure). ing. Similarly, on the opposite surface 22b of the other frame member 21b, the concave strip portion 502 and the convex strip portion 501 are arranged in the short direction X from one end side (rear side in the figure) from the module rear side (upper side in the figure). The ridges 501 and the ridges 502 are alternately formed in this order in the lateral direction X from the back side of the module (upper side in the figure) on the other end side (front side in the figure). ing.

  Specifically, the ridges 501 and 501 formed in the one end region γ1 and the other end region γ2 of the facing surface 22a of the one frame member 21a are ridge portions having a substantially L-shaped cross section extending along the longitudinal direction Y. ing. The concave strips 502 and 502 formed in the other end region γ2 and the one end region γ1 of the facing surface 22a of the one frame member 21a are concave strips having a substantially L-shaped cross section extending along the longitudinal direction Y. Similarly, the ridges 501 and 501 formed in the one end region γ1 and the other end region γ2 of the facing surface 22b of the other frame member 21b are ridges having a substantially L-shaped cross section extending along the longitudinal direction Y. ing. The groove portions 502 and 502 formed in the other end region γ2 and the one end region γ1 of the facing surface 22b of the other frame member 21b are recessed portions having a substantially L-shaped cross section extending along the longitudinal direction Y.

  Specifically, the ridges 501 and 501 on one side (the lower side in the drawing) in the short direction X are formed in the direction Z orthogonal to the facing surfaces 22a and 22b from the facing surfaces 22a and 22b of the frame members 21a and 21b. The first protrusions 511 and 511 on one side in the short-side direction X extending along the longitudinal direction Y projecting outward, and the first protrusions on the tips of the first protrusions 511 and 511 on the one side in the short-side direction X The second convex portions 512 and 512 on one side in the short direction are integrally extended to the other side (upper side in the drawing) of the opposing surfaces 22a and 22b so as to be orthogonal to the portions 511 and 511. ing. The surfaces of the second convex portions 512 and 512 on the facing surfaces 22a and 22b side are locking portions 512 'and 512'.

  The ridges 501 and 501 on the other side in the short-side direction X (upper side in the figure) are long sides protruding from the facing surfaces 22a and 22b of the frame members 21a and 21b to the outside in the direction Z perpendicular to the facing surfaces 22a and 22b. The first convex portions 511, 511 on the other side in the short direction X extending along the direction Y, and the first convex portions 511, 511 on the other side in the short direction X are orthogonal to the first convex portions 511, 511. In this way, it is composed of second convex portions 512 and 512 on the other side in the short direction extending integrally on one side (the lower side in the drawing) in the short direction X of the opposing surfaces 22a and 22b. The surfaces of the second convex portions 512 and 512 on the facing surfaces 22a and 22b side are locking portions 512 'and 512'.

  On the other hand, the concave portions 502, 502 on one side (the lower side in the drawing) in the short direction X are first convex portions 511 on the one side in the short direction X on the inner side in the facing surfaces 22a, 22b of the frame members 21a, 21b. , 511 are fitted into the first recesses 521, 521, and the second recesses 522, 522 are fitted into the second projections 512, 512 on one side in the lateral direction X.

  The concave strips 502 and 502 on the other side in the short-side direction X (upper side in the drawing) are provided with first convex portions 511 and 511 on the other side in the short-side direction X on the inner side in the facing surfaces 22a and 22b of the frame members 21a and 21b. It comprises first recesses 521 and 521 to be fitted, and second recesses 522 and 522 to be fitted with the second projections 512 and 512 on the other side in the lateral direction X. The protruding line portion 501 and the recessed line portion 502 are formed so that the opposing surfaces 22 a and 22 b are in close contact with each other so as to be relatively movable in the short direction X.

  Here, each concave portion 502 has a space P that allows movement of each convex portion 501 in the short direction X. Specifically, each first concave portion 521 is inserted into each second concave portion 522 when the second convex portion 512 is inserted in the direction Z perpendicular to the opposing surfaces 22a and 22b. It has the space P which permits the part 511 to move to the transversal direction X with each 2nd convex part 512. FIG.

  The frame members 21a and 21b are moved in the short direction X along the opposing surfaces 22a and 22b to move in directions other than the short direction X (specifically, the longitudinal direction Y and the separation of the frame members). The projections and recesses are engaged with each other in the direction Z) such that they cannot move relative to each other.

  In addition, although the ridge part 501 and the concave line part 502 are each two here, you may be made into one or three or more things.

  Moreover, you may comprise so that it may not move to the transversal direction X in the state in which each frame member 21a, 21b was connected (for example, a fixing member may be provided).

(Sixth embodiment)
FIG. 10 is a view for explaining the frame connection structure of the sixth embodiment provided in the first and second frame members 21a, 21b between the adjacent solar cell panels 20, 20, and FIG. ) Shows an exploded perspective view of each frame member 21a, 21b, and FIG. 10 (b) shows an ff line in FIG. 10 (a) showing a state in which the frame members 21a, 21b are engaged with each other. A cross-sectional view is shown. In FIG. 10, the same reference numerals are assigned to substantially the same components as those in the first embodiment shown in FIG.

  In the sixth embodiment, the locking portions 312 ′ that prevent movement in directions other than the direction along the facing surfaces 22a and 22b of the frame members 21a and 21b (here, the direction orthogonal to the facing surface 22a) are provided. A connection member 300 having a pair of ridges 301 and 301 extending along the longitudinal direction Y formed so as to face each other is provided.

  On both opposing surfaces 22a and 22b of the frame members 21a and 21b, concave line portions 302 and 302 that are respectively inserted into the pair of convex line portions 301 and 301 of the connecting member 300 are the pair of convex line portions 301 and 301. It is formed corresponding to each.

  Specifically, the connecting member 300 includes a protruding strip portion having a substantially T-shaped cross section in which a pair of protruding strip portions 301 and 301 formed so that the locking portions 312 ′ and 312 ′ face each other extend along the longitudinal direction Y. Here, a member having a substantially H-shaped cross section extending along the longitudinal direction Y is used. The concave portions 302 and 302 formed on the opposing surface 22a of the one frame member 21a and the opposing surface 22b of the other frame member 21b are concave portions having a substantially C-shaped cross section extending along the longitudinal direction Y, respectively. Yes.

  Specifically, the pair of ridges 301 and 301 of the connection member 300 are integrally connected in a plate shape along a direction Z orthogonal to the facing surfaces 22a and 22b of the frame members 21a and 21b. First convex portions 311 and 311 extending along Y, and both ends of the first convex portions 311 and 311 at both ends in the short direction X of the opposing surfaces 22a and 22b so as to be orthogonal to the first convex portions 311 and 311 The second convex portions 312 and 312 that are integrally extended to each other. The surfaces of the second convex portions 312 and 312 on the facing surfaces 22a and 22b side are locking portions 321 'and 321'. On the other hand, the concave portions 302 and 302 formed on the frame members 21a and 21b are respectively provided with first concave portions 321 and 321 into which the first convex portions 311 and 311 of the connection member 300 are fitted inside the opposing surfaces 22a and 22b. The second convex portions 312 and 312 of the connecting member 300 are inserted into the second concave portions 322 and 322. The protruding line portion 301 and the recessed line portion 302 are formed so that the opposing surfaces 22a and 22b are in close contact with each other so as to be relatively movable in the longitudinal direction Y.

  The frame members 21a and 21b and the connection member 300 are moved in the longitudinal direction Y along the opposing surfaces 22a and 22b, thereby moving in directions other than the longitudinal direction Y (specifically, the lateral direction X and the respective The concave / convex engagement is performed in the frame member separation direction Z) so as not to be relatively movable.

  In the sixth embodiment, the ridges 301 and the ridges 302 are the same ridges and ridges as those in the first embodiment shown in FIG. 5, but the second ridges shown in FIGS. 6 and 7. And it is good also as a convex strip part and a concave strip part similar to 3rd Embodiment.

  Moreover, you may comprise so that it may not move to the longitudinal direction Y in the state in which each frame member 21a, 21b was connected (for example, a fixing member may be provided).

  In the first to sixth embodiments described above, the recess portions 302 to 502 formed on the frame members 21a and 21b are provided with spaces for storing cables connected to the solar cell panel 20. Also good. In this regard, the seventh embodiment, which is a modification of the frame connection structure of the first embodiment shown in FIG. 5, and the eighth embodiment, which is a modification of the frame connection structure of the sixth embodiment shown in FIG. I will explain to you.

(Seventh embodiment)
FIG. 11 is a diagram showing the frame connection structure of the seventh embodiment in which a space Q for housing the cable C is provided in the frame connection structure of the first embodiment. FIG. The exploded perspective view of frame members 21a and 21b is shown, and Drawing 11 (b) shows the gg line sectional view of Drawing 11 (a) showing the state where each frame members 21a and 21b were engaged in unevenness. ing. In FIG. 11, substantially the same components as those in the first embodiment shown in FIG.

  In the example shown in FIG. 11, the panel side end portion is widened toward the panel side in the concave line portion (the concave line portion 302 of the second frame member 21 b), and extends to the panel side along the short direction X in the middle. As a result, a space Q is formed.

(Eighth embodiment)
FIG. 12 is a view showing the frame connection structure of the eighth embodiment in which a space Q for housing the cable C is provided in the frame connection structure of the sixth embodiment. FIG. FIG. 12B is an exploded perspective view of the frame members 21a and 21b, and FIG. 12B is a cross-sectional view taken along the line hh of FIG. 12A showing the state in which the frame members 21a and 21b are engaged with each other. ing. In FIG. 12, the same reference numerals are given to substantially the same components as those in the sixth embodiment in FIG.

  Similarly, in the example shown in FIG. 12, the panel side end portion of the concave strip portion (the concave strip portion 302 of the first and second frame members 21 a and 21 b) is widened toward the panel side, and in the short direction X in the middle. The space Q is formed by extending along the panel side.

  The shape of the space Q is not limited to that shown in FIGS. 11 and 12 and may be any shape as long as the cable C can be securely stored.

(About the first to eighth embodiments)
In the first to eighth embodiments described above, the frame members (21a, 21b), (21c, 21d) between the adjacent solar cell panels 20, 20 are engaged with each other so that they are not separated from each other. There are the following advantages.

  That is, in the first to fifth and seventh embodiments, the frame members (21a, 21b), (21c, 21d) between the adjacent solar cell panels 20, 20 are related to the facing surface of at least one frame member. Convex ridges 301 to 501 having stop portions 312 ′ to 512 ′ are formed, and concave ridges 302 to 502 that are engaged with the opposing surfaces of the opposing counterpart frame members corresponding to the ridges 301 to 501 are formed. ing. Then, the frame members (21a, 21b), (21c, 21d) between the adjacent solar cell panels 20, 20 are moved relative to each other in the longitudinal direction in the first to fourth and seventh embodiments. In the embodiment, by moving relative to each other in the lateral direction, the projections and recesses are engaged and connected.

  Moreover, in 6th and 8th embodiment, it is provided with the connection member 300 in which a pair of protruding item | line part 301,301 which has latching part 312 'was formed, and each frame member between the adjacent solar cell panels 20 and 20 ( 21a, 21b), (21c, 21d) facing surfaces (22a, 22b), (22c, 22d) corresponding to the pair of protruding strips 312 ′, 312 ′ of the connecting member 300, respectively. Portions 302 and 302 are formed. Then, the frame members (21a, 21b), (21c, 21d) between the adjacent solar cell panels 20, 20 and the connecting member 300 are connected by engaging with the concave and convex portions by relatively moving in the longitudinal direction. Yes.

  Thereby, directions other than the direction along the opposing surfaces (22a, 22b), (22c, 22d) of the frame members (21a, 21b), (21c, 21d) of the solar cell unit 1 (for example, directions orthogonal to the opposing surfaces) ) Can be improved.

  As described above, according to the first to eighth embodiments, along the opposing surfaces (22a, 22b) and (22c, 22d) of the frame members (21a, 21b), (21c, 21d) of the solar cell unit 1. Since the strength in directions other than the direction can be improved, the strength of the entire solar cell unit 1 can be improved.

  Moreover, since the frame members (21a, 21b), (21c, 21d) are engaged with each other so as not to be separated from each other, the solar cell module 2 can be transported in units (as the solar cell unit 1). This makes it possible to improve the workability of the transportation work.

  Furthermore, since the convex part and concave part which implement | achieve uneven | corrugated engagement are made into the convex strip part 301-501 and the concave strip part 302-502 which extend in a predetermined direction (here longitudinal direction), the connection strength by uneven | corrugated engagement improves. Accordingly, the strength of the entire solar cell unit 1 can be improved.

  Furthermore, in 1st, 4th and 6th to 8th embodiment, the protruding item | line part 301 is made into the protruding item | line part of a substantially T-shaped cross section, and the concave item part 302 is a protruding item | line part of a substantially T-shaped cross section. It is set as the concave-line part engaged correspondingly. In the second embodiment, the ridge 401 is a ridge having a wedge-shaped cross section, and the ridge 402 is a ridge that engages with the ridge having a wedge-shaped cross section. . Further, in the third and fifth embodiments, the ridge portion 501 is a ridge portion having a substantially L-shaped cross section, and the groove portion 502 is engaged with the ridge portion having a substantially L-shaped cross section. It is a concave streak. Therefore, the convex strips 301 to 501 and the concave strips 302 to 502 can be engaged with the concave and convex portions stably and reliably, and the strength of the entire solar cell unit 1 can be improved accordingly.

  Furthermore, in the first to eighth embodiments, the frame members (21a, 21b), (21c, 21d) are uneven as a result of relative movement in the direction along the opposing surfaces (22a, 22b), (22c, 22d). Since they are engaged, the convex strips 301 to 501 and the concave strips 302 to 502 of the frame members (21a, 21b) and (21c, 21d) can be smoothly and easily engaged.

  Furthermore, in the fifth embodiment, each frame member (21a, 21b), (21c, 21d) is engaged with each other by moving relative to each other in the short direction, so that each frame member ( 21a, 21b), (21c, 21d) can be easily engaged with the convex strip 501 and the concave strip 502.

  Furthermore, in the fourth embodiment, the concave line portion 302 is formed in the other end region α3 at a position corresponding to line symmetry with the center line β as the symmetry axis with respect to the formation position of the convex line portion 301 in the one end region α1. . Further, in the fifth embodiment, the concave strips 502 and 502 are symmetrical with respect to the center line β with respect to the formation positions of the convex strips 501 and 501 in the one end region γ1 and the other end region γ2 in the other end region γ2 and the one end region γ1. Each axis is formed at a position corresponding to line symmetry. Moreover, in 6th and 8th embodiment, the connection member 300 which has a pair of protruding item | line parts 301 and 301 of the same shape is provided, and both opposing surfaces (21a, 21b) and (21c, 21d) ( 22a, 22b) and (22c, 22d) are provided with concave portions 302, 302 corresponding to the pair of convex portions 301, 301 of the connecting member 300, respectively. By doing so, it is possible to use one type of frame member in common, and the manufacturing cost of the frame member and the part management cost of the frame member can be reduced accordingly.

  Further, when the space Q for storing the cable C is provided as in the seventh and eighth embodiments, the cable C is saved while saving space in the frame member in which the concave portions 302 to 502 are formed. Thus, the weather resistance of the cable C can be improved. Further, when the frame member is made of a metal material as in this example, it is possible to obtain a shielding effect against high voltage such as lightning.

(About manufacturing method and assembly method of solar cell unit)
Next, when the solar cell unit 1 according to the embodiment of the present invention is manufactured in a factory and when the solar cell unit 1 according to the embodiment of the present invention is assembled at an installation facility, the ninth and tenth embodiments are taken as examples. This will be described below with reference to FIGS. 13 and 14, the frame connection structure according to the embodiment of the present invention is not shown.

(Ninth embodiment)
In 9th Embodiment, the frame connection which concerns on embodiment of this invention in the 1st and 2nd frame members 21a and 21b between the adjacent solar cell panels 20 and 20 of the solar cell unit 1 to manufacture or the solar cell unit 1 to assemble. A case where the structure is provided will be described.

  FIG. 13 is a view for explaining the manufacturing method and the assembly method of the solar cell unit 1 according to the ninth embodiment. FIGS. 13 (a) to 13 (c) are respectively a holding step, a connecting step, and a connecting step. It is a perspective view which shows an attachment process.

  In the ninth embodiment, as a plurality (four in this case) of solar cell panels 20,..., Rectangular solar cell panels are used as viewed from the plane.

  Moreover, as the frame member provided with the frame connection structure according to the embodiment of the present invention, the inner first and second frame members 21a holding the inner first and second sides 20a, 20b in the solar cell panel 20 are provided. 21b.

  On the other hand, as the frame member not provided with the frame connection structure according to the embodiment of the present invention, the outer first and second frame members holding the outer first and second sides 20a and 20b in the solar cell panel 20. 210a, 210b and inner and outer third and fourth frame members 210c, 210d that hold the inner and outer third and fourth sides 20c, 20d of the solar cell panel 20 are used.

  First, in the holding step, as shown in FIG. 13 (a), the inner first and second frame members 21a and 21b are respectively arranged on the inner first and second sides 20a and 20b, and The solar cell panel 20 is held such that the outer first and second frame members 210a and 210b are disposed on the outer first and second sides 20a and 20b, respectively, and the third and fourth frame members. The solar cell panel 20 is held so that 210c and 210d are arranged on the third and fourth sides 20c and 20d, respectively.

  Next, in the connecting step, as shown in FIG. 13 (b), the first frame member 21a on the inside holding one solar cell panel 20 (right side in the drawing) in the holding step, and the holding step The other solar cell panel 20 (left side in the figure) is connected to the inner second frame member 21b by engaging the concave and convex portions with the frame connection structure. In the illustrated example, the case where the frame members 21a and 21b are engaged with each other by the relative movement in the longitudinal direction is illustrated.

  And in an attachment process, as shown in FIG.13 (c), it connects with the one solar cell module (the upper two solar cell modules 2 and 2 in the example of a figure) connected by the said connection process at the said connection process. The other solar cell module (the lower two solar cell modules 2 and 2 in the example in the figure) is attached to the gantry 10.

  According to the manufacturing method and assembly method of the solar cell unit 1 of the ninth embodiment, the inner first and second frame members 21a and 21b are disposed on the inner first and second sides 20a and 20b, respectively. After the solar cell panel 20 is held as described above, the first first frame member 20a holding one solar cell panel 20 and the second inner frame member 20b holding another solar cell panel 20 are connected to the frame. By engaging the projections and depressions in the structure, it is possible to manufacture the solar cell unit 1 well in the factory or to assemble it well at the installation facility.

  Here, the inner first and second frame members 21a and 21b are provided with the frame connection structure according to the embodiment of the present invention, and these frame members are connected in the connection step. Alternatively, the inner third and fourth frame members 210c and 210d may include the frame connection structure according to the embodiment of the present invention, and these frame members may be connected in the connection step. .

  Also, the outer (terminal) first to fourth frame members 210a to 210d that do not contribute to the connection between the solar cell modules 2 and 2 may of course include the frame connection structure according to the embodiment of the present invention. Good.

(10th Embodiment)
In 10th Embodiment, the frame connection which concerns on embodiment of this invention in the 3rd and 4th frame members 21c and 21d between the adjacent solar cell panels 20 and 20 of the solar cell unit 1 to manufacture or the solar cell unit 1 to assemble. A case where the structure is provided will be described.

  FIG. 14 is a view for explaining the manufacturing method and the assembly method of the solar cell unit 1 according to the tenth embodiment. FIGS. 14 (a) to 14 (c) are respectively a connection step, a holding step, and a holding step. It is a perspective view which shows an attachment process.

  In the tenth embodiment, as a plurality (four in this case) of solar cell panels 20..., Rectangular solar cell panels are used as viewed from the plane.

  Moreover, as the frame member provided with the frame connection structure according to the embodiment of the present invention, the inner third and fourth frame members 21c that hold the inner third and fourth sides 20c, 20d in the solar cell panel 20 are provided. , 21d.

  On the other hand, as the frame member not provided with the frame connection structure according to the embodiment of the present invention, the outer third and fourth frame members that hold the outer third and fourth sides 20c and 20d in the solar cell panel 20 are provided. 210c and 210d, and inner and outer first and second frame members 210a and 210b that hold the inner and outer first and second sides 20a and 20b of the solar cell panel 20 are used.

  First, in the connecting step, as shown in FIG. 14A, the inner third and fourth frame members 21c and 21d are connected by engaging and disengaging with the frame connecting structure. In the illustrated example, the case where the frame members 21c and 21d are engaged with each other by the relative movement in the longitudinal direction is illustrated.

  Next, in the holding step, as shown in FIG. 14B, the inner third and fourth frame members 21c and 21d connected in the connecting step are respectively connected to the inner third and fourth sides 20c and 20d. Holding the solar cell panel 20 so that the outer third and fourth frame members 210c and 210d are respectively disposed on the outer third and fourth sides 20c and 20d, and The solar cell panel 20 is held such that the first and second frame members 210a and 210b are disposed on the first and second sides 20a and 20b, respectively.

  Then, in the attaching step, as shown in FIG. 14C, one solar cell module (right two solar cell modules 2 and 2 in the example in the figure) held in the holding step and held in the holding step. The other solar cell module (the left two solar cell modules 2 and 2 in the example in the figure) is attached to the gantry 10.

  According to the manufacturing method and the assembly method of the solar cell unit 1 of the tenth embodiment, after the inner third and fourth frame members 21c and 21d are connected by engaging and disengaging with the frame connection structure, the connection The solar cell unit 1 is placed in the factory by holding the solar cell panel 20 so that the inner third and fourth sides 20c and 20d are arranged on the inner third and fourth frame members 21c and 21d, respectively. It is possible to manufacture well or to assemble well at the installation facility.

  Here, the inner third and fourth frame members 21c and 21d are provided with the frame connection structure according to the embodiment of the present invention, and these frame members are connected in the connection step. Alternatively, the inner first and second frame members 210a and 210b may be provided with the frame connection structure according to the embodiment of the present invention, and these frame members may be connected in the connection step. .

  Also, the outer (terminal) first to fourth frame members 210a to 210d that do not contribute to the connection between the solar cell modules 2 and 2 may of course include the frame connection structure according to the embodiment of the present invention. Good.

DESCRIPTION OF SYMBOLS 1 Solar cell unit 2 Solar cell module 20 Solar cell panel 20a-20d The 1st to 4th edge | sides 21a-21d of a solar cell panel 1st-4th frame member (an example of a frame)
22a, 22b Opposing surfaces 22c, 22d of the first and second frame members Opposing surfaces 300 of the third and fourth frame members Connecting members 312′-512 ′ Locking portions 301-501 Convex portions 302-502 Convex portions C Cable Q space α1-α3 3 region α1 one end region α3 other end region β center line γ1, γ2 2 region γ1 one end region γ2 other end region

Claims (18)

In a solar cell unit in which a plurality of solar cell modules holding a solar cell panel in a frame are arranged in a plane, a frame connection structure for connecting frames between adjacent solar cell panels,
The frame connection structure for solar cell panels, wherein the frames between the adjacent solar cell panels are engaged so that their opposing surfaces do not move in a direction away from each other. In a solar cell unit in which a plurality of solar cell modules holding a solar cell panel in a frame are arranged in a plane, a frame connection structure for connecting frames between adjacent solar cell panels,
On the facing surface of at least one of the frames between the adjacent solar cell panels, a convex portion having a locking portion that prevents the facing surfaces of the frames from moving in directions away from each other is formed. And
A frame of a solar cell panel, wherein a concave portion that engages with the convex portion is formed on an opposing surface of a counterpart frame connected to the at least one frame on which the convex portion is formed. Connection structure. In a solar cell unit in which a plurality of solar cell modules holding a solar cell panel in a frame are arranged in a plane, a frame connection structure for connecting frames between adjacent solar cell panels,
A connecting member having a pair of protruding strips each formed with a locking portion for preventing movement in a direction in which the opposing surfaces of each frame between the adjacent solar battery panels are separated from each other;
On the facing surface of each frame between the adjacent solar cell panels, a concave portion that engages with each of the pair of convex portions of the connecting member is formed. Panel frame connection structure. The solar cell panel frame connection structure according to claim 3,
A frame connection structure for a solar cell panel, wherein each frame between the adjacent solar cell panels is engaged with the connection member in a concavo-convex manner by relatively moving in a direction along the facing surface. The solar cell panel frame connection structure according to claim 2,
The convex part is a ridge part,
The said recessed part is made into the concave strip part engaged corresponding to the said convex strip part, The frame connection structure of the solar cell panel characterized by the above-mentioned. It is a frame connection structure of the solar cell panel according to claim 5,
A frame connection structure for a solar cell panel, wherein the frames between the adjacent solar cell panels are engaged with each other by moving relative to each other in a direction along the facing surface. The frame connection structure of the solar cell panel according to claim 5 or 6,
The convex portion is a ridge that extends along the longitudinal direction of the facing surface,
The recess is a recess that extends along the longitudinal direction of the facing surface, and is a recess that engages in correspondence with the protrusion.
The ridge is formed in a part or all along the longitudinal direction from the edge in one end region of the three regions obtained by equally dividing the opposing surface into three in the longitudinal direction,
The concave line portion is a line with a center line perpendicular to the center of the opposing surface in the longitudinal direction of the opposite surface in the other end region of the three regions of the opposing surface as a symmetry axis. A frame connection structure for a solar cell panel, wherein the frame connection structure is formed at a position corresponding to symmetry. The frame connection structure of the solar cell panel according to claim 5 or 6,
The convex portion is a ridge that extends along the longitudinal direction of the facing surface,
The recess is a recess that extends along the longitudinal direction of the facing surface, and is a recess that engages in correspondence with the protrusion.
The ridge is formed in a part or all along the longitudinal direction from the edge in one end region of the two regions obtained by dividing the opposing surface into two in the longitudinal direction,
The concave line portion is a line having a center line orthogonal to the center in the longitudinal direction of the opposed surface as a symmetry axis with respect to the formation position of the convex line portion in the one end region in the other end region of the two regions of the opposed surface. A frame connection structure for a solar cell panel, wherein the frame connection structure is formed at a position corresponding to symmetry. A frame connection structure for a solar cell panel according to any one of claims 3 to 7,
The protruding portion is a protruding portion having a substantially T-shaped cross section,
The frame connection structure for a solar cell panel, wherein the recess is a recess that engages with the protrusion having a substantially T-shaped cross section. A frame connection structure for a solar cell panel according to any one of claims 3 to 7,
The ridge portion is a ridge portion having a wedge-shaped cross section,
The frame connection structure for a solar cell panel, wherein the recess is a recess that engages with the wedge having a wedge-shaped cross section. A frame connection structure for a solar cell panel according to any one of claims 3 to 8,
The ridge portion is a ridge portion having a substantially L-shaped cross section,
The frame connection structure for a solar cell panel, wherein the recess is a recess that engages with the protrusion having a substantially L-shaped cross section. The frame connection structure of the solar cell panel according to any one of claims 3 to 11,
A frame connection structure for a solar cell panel, wherein the concave portion is provided with a space for housing a cable.   A solar cell module, wherein a solar cell panel is held by a frame provided with the frame connection structure according to any one of claims 1 to 12.   A solar cell unit, wherein a plurality of the solar cell modules according to claim 13 are arranged in a planar shape in an engaged state by the frame connection structure. A solar cell unit manufacturing method for manufacturing the solar cell unit according to claim 14 in a factory,
Using a polygonal solar cell panel as seen from the plane as the plurality of solar cell panels,
As the frame, using at least one frame holding at least one side of at least two solar cell panels,
A holding step of holding the at least two solar cell panels such that each at least one frame is disposed on a corresponding side;
A connecting step of connecting each of the at least one frame holding the at least two solar cell panels in the holding step by engaging the frame connecting structure. Method. A solar cell unit manufacturing method for manufacturing the solar cell unit according to claim 14 in a factory,
Using a polygonal solar cell panel as seen from the plane as the plurality of solar cell panels,
As the frame, using at least one frame holding at least one side of at least two solar cell panels,
A connecting step of connecting each of the at least one frame by engaging with the frame connecting structure;
A holding step of holding the at least two solar cell panels so that each of the at least one frame connected in the connecting step is disposed on a corresponding side. . A solar cell unit assembly method for assembling the solar cell unit according to claim 14 at an installation facility,
Using a polygonal solar cell panel as seen from the plane as the plurality of solar cell panels,
As the frame, using at least one frame holding at least one side of at least two solar cell panels,
A holding step of holding the at least two solar cell panels such that each at least one frame is disposed on a corresponding side;
A connecting step of connecting each of the at least one frame holding the at least two solar cell panels in the holding step by engaging the frame connecting structure. Construction method. A solar cell unit assembly method for assembling the solar cell unit according to claim 14 at an installation facility,
Using a polygonal solar cell panel as seen from the plane as the plurality of solar cell panels,
As the frame, using at least one frame holding at least one side of at least two solar cell panels,
A connecting step of connecting each of the at least one frame by engaging with the frame connecting structure;
And a holding step of holding the at least two solar cell panels so that each of the at least one frame connected in the connecting step is disposed on a corresponding side. .

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