Patent Publication Number: US-2023133666-A1

Title: Solar battery module installation structure and dwelling

Description:
TECHNICAL FIELD 
     The present invention relates to a solar cell module installation structure to be provided on a wall surface of a building, and relates to a house. 
     BACKGROUND ART 
     In recent years, due to promotion of renewable energy, it has been promoted that houses are made to be zero-energy houses (hereinafter, also referred to as ZEHs). 
     Typical examples of renewable energy include a solar power generation system using a solar cell module. Examples of a conventional solar power generation system include a solar cell module installed on a roof surface of a house. 
     However, when a solar cell module is installed only on a roof surface of a house as in a conventional manner, it is impossible to secure a sufficient light receiving area to make the house to be a ZEH in some cases. 
     To address this issue, in recent years, efforts have been made to a secure power-generation capacity as a whole by not only installing a solar cell module only on a roof surface of a house as in the conventional manner but also installing a solar cell module on a wall surface of the house (for example, Patent Document 1). 
     PRIOR ART DOCUMENTS 
     Patent Documents 
     Patent Document 1: JP 2010-275808 A 
     Patent Document 2: JP 2017-011953 A 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     It can be considered that, when a solar cell module is installed on a wall surface of a building, a sense of unity of the solar cell module with the building can be provided by lowering the height from the wall surface of the building to a light receiving surface of the solar cell module, thereby achieving excellence in design. 
     On the other hand, when the height from the wall surface of the building to the light receiving surface of the solar cell module is lowered, the space between a back surface of the solar cell module and the wall surface of the building is narrowed, whereby a wiring space is extremely narrowed. 
     In some types of solar cell modules, frames are provided on the four sides of a solar cell panel, and mounting parts are provided on the frames to extend along the sides of the solar cell panel on the rear side of the solar cell panel (for example, Patent Document 2). 
     When the solar cell module as described in Patent Document 2 is attached to a wall surface of a building, a wiring line of the solar cell module is bypassed to the outer side of the end of a mounting part in the longitudinal direction so as to go around the mounting part, and is connected to another solar cell module. That is, in such a case, there is a problem that the connection between the solar cell modules is complex. Furthermore, in such a case, because the wiring line goes around the mounting part, it is necessary to increase the length of the wiring line; therefore, there is also a problem of increase in manufacturing cost. 
     Therefore, an object of the present invention is to provide a solar cell module installation structure and a house that can reduce manufacturing cost and have good workability as compared with the related art. 
     Solution to Problem 
     To solve the above problems, one aspect of the present invention is a solar cell module installation structure including: a solar cell module; and a support member that installs the solar cell module on a wall surface of a building, wherein the support member includes a rail part extending substantially in a vertical direction, the rail part having a vertical length longer than or equal to a vertical length of the solar cell module, wherein the solar cell module includes: a solar cell panel; and a frame member, the solar cell panel including: a main body panel; a terminal box provided on a back surface of the main body panel; and a wiring part extending from the terminal box, the frame member including: a holding recess; and a mounting part, the holding recess sandwiching a part of the main body panel, thereby being in contact with a light receiving surface and the back surface of the main body panel, wherein the mounting part is provided on a back surface side of the main body panel and is attached to the rail part, wherein the mounting part includes a penetration part that passes through from an inside to an outside of the mounting part with reference to the terminal box when the light receiving surface is viewed from front, and wherein the wiring part passes through the penetration part. 
     The term “building” here refers to a building such as a house, an office, a warehouse, a store, a factory, a school building, a lodging place, or a garage. 
     The term “substantially in a vertical direction” above includes not only a case of being completely vertical (a direction at 90 degrees with respect to a horizontal plane) but also a case of being negligibly inclined with respect to the vertical direction. Specifically, the “substantially in a vertical direction” includes a case of being inclined within a range of ±5 degrees with respect to the vertical direction. 
     According to this aspect, the wiring part passes through the penetration part of the mounting part; therefore, the wiring part can be directly connected to an external power source or another solar cell module without going around the mounting part. As a result, as compared with the case where the wiring part goes around the mounting part, the wiring part can be simply routed; therefore, the length of the wiring part can be shortened, and a construction time can be shortened. As a result, the manufacturing cost can be reduced and the workability at the time of manufacturing is improved as compared with the case where the wiring part goes around the mounting part. 
     In a preferred aspect, the penetration part is composed of a notch or a through hole. 
     With this aspect, the penetration part is easily formed, and the wiring part is easily positioned. 
     In a preferred aspect, the frame member includes: a holding frame having the holding recess; and a mounting frame having the mounting part. 
     According to this aspect, the holding recess and the mounting part are provided on separate members; therefore, it is possible to replace the holding frame and the mounting frame individually. Therefore, the maintenance cost can be reduced. 
     In a more preferred aspect, the support member includes a locking part, the mounting frame includes: a panel-side wall part and a support-side wall part facing each other at an interval on the back surface side of the main body panel; and a connection wall part connecting the panel-side wall part and the support-side wall part, the support-side wall part is engaged with the locking part, and the penetration part is arranged on the connection wall part. 
     With this aspect, the penetration part that allows the wiring part to pass therethrough is provided in the connection wall part. Therefore, the wiring part is allowed to pass through substantially at the shortest distance, and it is therefore possible to reduce production cost. 
     In a preferred aspect, the holding recess and the mounting part of the frame member are composed of a single member. 
     With this aspect, the number of components can be reduced, and workability can be improved as compared with the conventional art. 
     One aspect of the present invention is a solar cell module installation structure including: two solar cell modules provided side by side adjacent to each other; and a support member that installs the two solar cell modules on a wall surface of a building, wherein each of the two solar cell modules includes: a solar cell panel; and a frame member, the solar cell panel including: a main body panel; a terminal box provided on a back surface of the main body panel; and a wiring part extending from the terminal box, the frame member including: a holding recess; and a mounting part, the holding recess sandwiching a part of the main body panel, thereby being in contact with a light receiving surface and the back surface of the main body panel, wherein the mounting part is provided on a back surface side of the main body panel and is attached to the support member, wherein the mounting part includes a penetration part that passes through from an inside to an outside of the mounting part with reference to the terminal box when the light receiving surface is viewed from front, wherein the two solar cell modules include: a first and a second solar cell modules, wherein the wiring part of the first solar cell module passes through the penetration part of the first solar cell module and further passes through the penetration part of the second solar cell module, and wherein the wiring part of the first solar cell module is connected to the wiring part of the second solar cell module on the back surface side of the main body panel of the second solar cell module. 
     According to this aspect, the wiring part extending from the terminal box of the first solar cell module passes through the penetration part of the first solar cell module, further passes through the penetration part of the second solar cell module, and is connected to the wiring part extending from the terminal box of the second solar cell module on the back surface side of the second solar cell module. Therefore, the manufacturing cost can be reduced and the workability at the time of manufacturing is improved as compared with the case where the wiring part goes around the mounting part. In addition, the wiring part is not located between the first solar cell module and the second solar cell module; therefore, the interval between the first solar cell module and the second solar cell module can be narrowed, and the number of solar cell modules installed per unit area can be increased. 
     In a preferred aspect, the terminal box of the first solar cell module is off-centered toward a side of the second solar cell module in a direction in which the two solar cell modules are provided side by side, and the terminal box of the second solar cell module is off-centered toward a side of the first solar cell module in the direction in which the two solar cell modules are provided side by side. 
     With this aspect, the length of the wiring part connecting the terminal box of the first solar cell module and the terminal box of the second solar cell module can be shortened, and the manufacturing cost can be reduced. 
     One aspect of the present invention is a house including: a wall surface; and the above-described solar cell module installation structure, wherein the solar cell module installation structure is installed on the wall surface. 
     According to this aspect, the manufacturing cost can be reduced, and the workability is improved. 
     Effect of Invention 
     With a solar cell module installation structure and a house of the present invention, the manufacturing cost can be reduced, and the workability is improved. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a perspective view schematically illustrating a solar cell module installation structure according to a first embodiment of the present invention. 
         FIG.  2    is an exploded perspective view of the installation structure of  FIG.  1   . 
         FIG.  3    is an exploded perspective view of the solar cell module of  FIG.  2   . 
         FIGS.  4 A and  4 B  are explanatory views of the solar cell panel of  FIG.  3   , wherein  FIG.  4 A  is a front view of the solar cell panel, and  FIG.  4 B  is a rear view of the solar cell panel. 
         FIG.  5    is an exploded perspective view of the frame member of  FIG.  3   . 
         FIG.  6    is a vertical cross-sectional perspective view of the solar cell module of  FIG.  2    as viewed from the upper side of the front. 
         FIG.  7    is a lateral cross-sectional perspective view of the solar cell module of  FIG.  2    as viewed from the lower side of the front. 
         FIG.  8    is a side view of the solar cell module of  FIG.  2   . 
         FIG.  9    is a perspective view of the solar cell module of  FIG.  2    as viewed from the upper side of the back. 
         FIG.  10    is a perspective view of the support members of  FIG.  2   . 
         FIG.  11    is an explanatory view of a construction procedure of the solar cell module installation structure of  FIG.  1   , and is a perspective view when the support members are attached to a wall surface. 
         FIG.  12    is an explanatory view of a construction procedure of the solar cell module installation structure of  FIG.  1   , and is a perspective view when the solar cell modules are aligned in the lateral direction. 
         FIGS.  13 A and  13 B  are explanatory views of a construction procedure of the solar cell module installation structure of  FIG.  1   , wherein  FIG.  13 A  is a side view illustrating a state in which the solar cell module is inclined with respect to the wall surface, and  FIG.  13 B  is a side view illustrating a state in which the solar cell module is made parallel to the wall surface. 
         FIG.  14    is a partially broken perspective view of two solar cell modules adjacent to each other in the lateral direction of the installation structure of  FIG.  1    as viewed from the lower side of the front. 
         FIG.  15    is a perspective view of the two solar cell modules adjacent to each other in the lateral direction of the installation structure of  FIG.  1    as viewed from the upper side of the back. 
         FIG.  16    is a perspective view of a solar cell module of a second embodiment of the present invention as viewed from the lower side of the back. 
         FIG.  17    is a vertical cross-sectional perspective view of the solar cell module of  FIG.  16    as viewed from the lower side of the back. 
         FIG.  18    is a lateral cross-sectional perspective view of the solar cell module of  FIG.  16    as viewed from the upper side of the back. 
         FIG.  19    is a side view of a main part of a solar cell module according to another embodiment of the present invention. 
         FIG.  20    is a cross-sectional perspective view of a main part of a solar cell module installation structure according to another embodiment of the present invention. 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, embodiments of the present invention will be described in detail. In the following description, the installation posture of  FIG.  1    is used as a reference unless otherwise specified. 
     As illustrated in  FIGS.  1  and  2   , in a solar cell module installation structure  1  (hereinafter, also simply referred to as an installation structure  1 ) of a first embodiment of the present invention, a plurality of solar cell modules  2  ( 2   a  to  2   d ) are installed on a wall surface  200  of a building by support members  3 . Specifically, the installation structure  1  includes the plurality of solar cell modules  2   a  to  2   d  and the support members  3 , and the solar cell modules  2   a  to  2   d  are arranged vertically and laterally in a matrix when viewed from the front. 
     The installation structure  1  of the present embodiment is mainly employed for a house, and is installed on a wall surface  200  of the house, thereby constituting an appearance of the house. 
     As illustrated in  FIG.  3   , the solar cell modules  2  each include a solar cell panel  10  and a frame member  11  as main constituent members. 
     The solar cell panel  10  is a photoelectric conversion panel including a solar cell therein, and can convert light energy received by a power generation region  25  into electric energy. 
     As illustrated in  FIG.  4   , the solar cell panel  10  mainly includes a main body panel  20 , terminal boxes  21   a  and  21   b , and wiring portions (wiring parts)  22   a  and  22   b.    
     The main body panel  20  is made such that a solar cell is formed on a glass substrate and is sealed with sealing glass or a sealing film. 
     As illustrated in  FIGS.  4 A and  4 B , the main body panel  20  is a plate-shaped panel that has a light receiving surface  23  (first main surface) and a back surface  24  (second main surface) and has a quadrangular shape when the light receiving surface  23  is viewed from the front. 
     As illustrated in  FIG.  4 A , when viewed from the front, the light receiving surface  23  has lateral sides  26  and  27  extending in a lateral direction X and longitudinal sides  28  and  29  extending in a longitudinal direction Y, and the power generation region  25  is at the center. 
     As illustrated in  FIG.  4 B , the terminal boxes  21   a  and  21   b  are provided at a central part of the back surface  24  of the main body panel  20 , and are used to connect wiring extending from the solar cell to the wiring portions  22   a  and  22   b  inside the main body panel  20 . 
     The terminal boxes  21   a  and  21   b  are provided at the central part of the back surface  24  of the main body panel  20 , and are arranged side by side at an interval in the lateral direction X. 
     The wiring portions  22   a  and  22   b  are the wiring that extends from the terminal boxes  21   a  and  21   b , and connect the solar cell of the main body panel  20  to which the wiring portions  22   a  and  22   b  are connected, to the solar cell of the main body panel  20  of another solar cell module  2  or to an external power source. 
     The wiring portions  22   a  and  22   b  are the wiring respectively connected to one of the different electrodes of the solar cell in the main body panel  20  inside the terminal boxes  21   a  and  21   b . Specifically, the wiring portion  22   a  is positive electrode wiring whose base end is connected to a positive electrode of the solar cell of the main body panel  20 , and the wiring portion  22   b  is negative electrode wiring whose base end is connected to a negative electrode of the solar cell of the main body panel  20 . 
     The wiring portions  22   a  and  22   b  are respectively provided with connector portions  30   a  and  30   b  connectable to other wiring portions  22   b  and  22   a , at the distal ends (ends on the opposite side to terminal boxes  21   a  and  21   b ) of the wiring portions  22   a  and  22   b.    
     As illustrated in  FIG.  5   , the frame member  11  includes a holding frame  40  and mounting frames  41  and  42  (mounting parts). 
     The holding frame  40  is a frame for holding the main body panel  20 , and is a reinforcing frame having flexural rigidity higher than the rigidity of the main body panel  20 . Specifically, the holding frame  40  is a metal frame made of aluminum. 
     As illustrated in  FIG.  3   , the holding frame  40  is a quadrangular-shaped frame when viewed from the front, and extends along sides  26  to  29  of main body panel  20  so as to surround the power generation region  25 . 
     As illustrated in  FIG.  5   , the holding frame  40  includes lateral frames  45  and  46  and longitudinal frames  47  and  48 . 
     As illustrated in  FIGS.  5  and  6   , the lateral frames  45  and  46  are elongated frames extending in the lateral direction X along the lateral sides  26  and  27 , and each have a holding recess  50  and a space keeping piece  51 . 
     As illustrated in  FIG.  6   , each of the holding recesses  50  is a recess that holds the vicinity of an end of the solar cell panel  10  in the longitudinal direction Y and protects an end face including one of the lateral sides  26  and  27  of the solar cell panel  10 . 
     Each of the holding recesses  50  has a U-shaped cross-section and extends along one of the lateral sides  26  and  27 , and includes a front side cover part  52 , a rear side cover part (back surface side cover part)  53 , and an end side cover  54 . 
     As illustrated in  FIG.  6   , the front side cover parts  52  are parts that cover the light receiving surface  23  side of the solar cell panel  10 . 
     The rear side cover parts  53  are parts that cover the back surface  24  side of the solar cell panel  10 , and face the front side cover parts  52  with the solar cell panel  10  interposed therebetween. 
     The end side covers  54  are parts that cover the end faces, in the longitudinal direction Y, of the solar cell panel  10 , and connect the ends of their corresponding front side cover parts  52  and rear side cover parts  53 . Specifically, each of the front side cover parts  52  and its corresponding rear side cover part  53  are erected in the same direction from the ends of the corresponding end side cover  54 , and extend toward the inside (center side of the main body panel  20 ). 
     As illustrated in  FIG.  6   , the space keeping pieces  51  are parts that secure installation spaces for the terminal boxes  21   a  and  21   b  of the solar cell panel  10 , and each are configured with an opposing wall part  55  and a connection wall part  56 . 
     Each of the opposing wall parts  55  is a wall part that faces its corresponding rear side cover part  53  with an interval therebetween, on the back side of that rear side cover part  53 . 
     Each of the connection wall parts  56  is a wall part that connects its corresponding rear side cover part  53  and opposing wall part  55 , and is erected from that rear side cover part  53  and also erected from that opposing wall part  55 . 
     Specifically, each of the opposing wall parts  55  is erected in the same direction as its corresponding rear side cover part  53  and extends toward the inside (center side of the main body panel  20 ). 
     As illustrated in  FIGS.  5  and  7   , the longitudinal frames  47  and  48  are elongated frames extending in the longitudinal direction Y along the longitudinal sides  28  and  29 , and each have a holding recess  70 , a space keeping piece  71 , and coupling parts  77  and  78 . 
     As illustrated in  FIG.  7   , each of the holding recesses  70  is a recess that holds the vicinity of the end, in the lateral direction X, of the solar cell panel  10  and protects an end face including one of the longitudinal sides  28  and  29  of the solar cell panel  10 . 
     Each of the holding recesses  70  has a U-shaped cross-section and extends along one of the longitudinal sides  28  and  29 , and includes a front side cover part  72 , a rear side cover part  73 , and an end side cover  74 . 
     The front side cover part  72  is a part that covers the light receiving surface  23  side of the solar cell panel  10 . 
     The rear side cover part  73  is a part covering the back surface  24  side of the solar cell panel  10 , and faces its corresponding front side cover part  72  with the solar cell panel  10  interposed therebetween. 
     Each of the end side covers  74  is a part covering one of end faces, in the lateral direction X, of the solar cell panel  10 , and connects the ends of its corresponding front side cover part  72  and rear side cover part  73 . Specifically, each of the front side cover parts  72  and its corresponding rear side cover part  73  are erected in the same direction from the ends of their corresponding end side covers  74 , and extend toward the inside (center side of the main body panel  20 ). 
     The space keeping pieces  71  are parts that secure an installation space for the terminal boxes  21   a  and  21   b  of the solar cell panel  10 , and each are composed of an opposing wall part  75  (locking wall part) and a first connection wall part  76  as illustrated in  FIG.  7   . 
     Each of the opposing wall parts  75  is a wall part that faces its corresponding rear side cover part  73 , on the back side of that rear side cover part  73  with an interval therebetween, and also serves as a locking wall part that engages with one of the mounting frames  41  and  42 . 
     Each of the first connection wall parts  76  is a wall part that connects its corresponding rear side cover part  73  and opposing wall part  75 , and is erected from that rear side cover part  73  and also erected from that opposing wall part  75 . 
     Specifically, the opposing wall parts  75  are erected in the same direction as their corresponding rear side cover parts  73  and extend toward the inside (center side of the main body panel  20 ). 
     As illustrated in  FIG.  5   , the coupling parts  77  and  78  are portions that are provided at the ends of the longitudinal frames  47  and  48  in the longitudinal direction and are respectively coupled to the ends of the lateral frames  45  and  46 . 
     The mounting frames  41  and  42  are mounting parts to be mounted to the support members  3 , and also serve as reinforcing frames to reinforce the rigidity of the solar cell panel  10 . 
     As illustrated in  FIG.  5   , the mounting frames  41  and  42  extend along the longitudinal frames  47  and  48 , and the lengths of the mounting frames  41  and  42  in the longitudinal direction are preferably more than or equal to ½ of the lengths of the longitudinal sides  28  and  29  of the main body panel  20  and are more preferably more than or equal to ¾. 
     The lengths of the mounting frames  41  and  42  in the longitudinal direction are preferably shorter than the longitudinal lengths of the longitudinal frames  47  and  48 . 
     The mounting frames  41  and  42  have flexural rigidity higher than that of the main body panel  20 , and are specifically metal frames made of metal. 
     As illustrated in  FIG.  5   , the mounting frames  41  and  42  are elongated frames having a U-shaped cross-section, and each include a panel-side wall part  90 , a support-side wall part  91 , and a second connection wall part  92 . 
     As illustrated in  FIG.  7   , the panel-side wall part  90  is an engagement wall part that is mounted by being engaged with the opposing wall part  75  of the longitudinal frame  47  (or the opposing wall part  75  of the longitudinal frame  48 ). 
     Each of the support-side wall part  91  is a wall part facing its corresponding panel-side wall part  90  with an interval therebetween, on the back side of that panel-side wall part  90 . Each of the support-side wall parts  91  also serves as an engagement wall part to be engaged with the locking piece  101  (see  FIG.  2   ) and the engagement part  102  (see  FIG.  2   ) of its corresponding support member  3 . That is, the support-side wall parts  91  function as mounting parts with respect to the support members  3 . 
     The second connection wall parts  92  are wall parts that connect the panel-side wall parts  90  and the support-side wall parts  91 . That is, each of the panel-side wall parts  90  and its corresponding support-side wall part  91  are erected in the same direction from both end parts of their corresponding second connection wall part  92 , and extend outward. 
     As illustrated in  FIGS.  5  and  8   , each of the second connection wall parts  92  includes a wiring hole  93  ( 93   a ,  93   b ) (penetration part) and a notch part  94  ( 94   a ,  94   b ) (mounting-side engagement part). 
     As illustrated in  FIG.  8   , the wiring holes  93   a  and  93   b  are through holes that are respectively provided at middle parts of the mounting frames  41  and  42  in the longitudinal direction and penetrate through the second connection wall parts  92  and  92  in the thickness direction. In other words, the wiring holes  93   a  and  93   b  are respectively penetration parts penetrating the second connection wall parts  92  and  92  from the inside to the outside with reference to the terminal boxes  21   a  and  2  lb when the light receiving surface  23  is viewed from the front. 
     The term “middle part” above refers to a part other than both end parts in one direction and any part between the both end parts. The same applies hereinafter. 
     The wiring holes  93   a  and  93   b  of the present embodiment are respectively arranged at positions corresponding to the terminal boxes  21   a  and  21   b  with respect to the longitudinal direction Y, and specifically, are provided at central parts of the second connection wall parts  92  in the longitudinal direction Y. 
     As illustrated in  FIG.  9   , the wiring holes  93   a  and  93   b  respectively allow the connector portions  30   a  and  30   b  of the wiring portions  22   a  and  22   b  extendingly provided from the terminal boxes  21   a  and  21   b  to pass therethrough. 
     The opening shapes of the wiring holes  93   a  and  93   b  are not particularly limited. The opening shapes may be a circular shape as illustrated in  FIG.  5   , may be a polygonal shape such as a triangle, a quadrangle, or a pentagon, or may be an elliptical shape, an oval shape, or the like. 
     As illustrated in  FIG.  8   , the notch parts  94   a  and  94   b  are notches respectively provided at lower end parts of the second connection wall parts  92  and  92  of the mounting frames  41  and  42  in the vertical direction, and are engagement parts engageable with the locking parts  132  (see  FIG.  10   ) of the support members  3 . 
     The notch parts  94   a  and  94   b  have a width in the thickness direction of the solar cell panel  10 , respectively have lengths in the extending directions of the mounting frames  41  and  42 , and have a depth extending upward in the vertical direction. 
     As in the enlarged view of  FIG.  8   , each notch part  94  ( 94   a ,  94   b ) has a trapezoidal shape in side view, and includes a bottom wall part  95 , a first inner wall part  96  (parallel surface), and a second inner wall part  97  (inclined surface). 
     The bottom wall part  95  is a wall part which constitutes a bottom part of the notch part  94  and with which an end face of the locking part  132  comes in contact when attached to the support member  3 . The bottom wall part  95  constitutes an upper end part of the notch part  94  in an installed state. 
     The first inner wall part  96  is a vertical wall part hanging downward in the vertical direction from a front end part of the bottom wall part  95 , and is a parallel surface parallel to the support surface  129  in a state where the installation structure  1  is completed. 
     The second inner wall part  97  is a wall part obliquely extending from the rear end part of the bottom wall part  95  at a predetermined inclination angle θ with respect to the vertical direction. That is, in side view as illustrated in  FIG.  8   , the second inner wall part  97  has an inclined surface inclined at a predetermined inclination angle θ 1  with respect to a vertical axis L extending in the vertical direction. 
     The inclination angle θ 1  shown in  FIG.  8    can be changed as appropriate by an inclination angle θ 2  (see  FIG.  13   ) of the inclined posture to be described later, but is preferably more than or equal to 10 degrees, and is more preferably more than or equal to 30 degrees. The inclination angle θ 1  is less than 90 degrees, and is more preferably less than or equal to 60 degrees. Within this range, when the solar cell module  2  is in the inclined posture, the locking part  132  hardly falls off from the notch part  94 . 
     In the notch part  94 , the distance between the first inner wall part  96  and the second inner wall part  97  is gradually wider toward the depth direction of the notch part  94  (the direction from lower end part to the upper end part of the mounting frame  41  or  42 ). 
     Here, a description will be given on the positional relationship between the members in the solar cell module  2 . 
     As illustrated in  FIG.  6   , in the solar cell module  2 , an upper end part of the main body panel  20  in the up-down direction (longitudinal direction Y) is inserted in the holding recess  50   a  of an upper frame  45 , and a lower end part is attached to the holding recess  50   b  of a lower frame  46  (first frame part). That is, an upper end face of the main body panel  20  is protected by the upper frame  45 , and a lower end face of the main body panel  20  is protected by the lower frame  46 . 
     As illustrated in  FIG.  7   , in the solar cell module  2 , the side end of the main body panel  20  on the left side in the left-right direction (lateral direction X) is inserted in the holding recess  70   a  of a left frame  47  (second frame part), and the side end on the right side is inserted in the holding recess  70   b  of a right frame  48  (second frame part). That is, when viewed from the front, the side end face, on the left side, of the main body panel  20  is protected by the left frame  47 , and the side end face, on the right side, of the main body panel  20  is protected by the right frame  48 . 
     As can be seen from  FIG.  5   , the coupling parts  77   a  and  77   b  respectively provided at the upper ends of the longitudinal frames  47  and  48  are coupled to both end parts of the lateral frame  45 , and the coupling parts  78   a  and  78   b  respectively provided at lower end parts of the longitudinal frames  47  and  48  are coupled both end parts of the lateral frame  46 . 
     As illustrated in  FIG.  2   , the power generation region  25  of the solar cell panel  10  is exposed from the frame member  11 . 
     As illustrated in  FIG.  7   , the mounting frames  41  and  42  are on the back surface  24  side of the main body panel  20 , and the panel-side wall parts  90  and  90  are engaged with the opposing wall parts  75  and  75  of the longitudinal frames  47  and  48 . 
     In the mounting frames  41  and  42 , the surfaces, of the panel-side wall parts  90  and  90 , on the opposite side with respect to the main body panel  20  are in surface contact with the surfaces, of the opposing wall parts  75  and  75 , on the main body panel  20  side, and in this state, the mounting frames  41  and  42  and the opposing wall parts  75  and  75  are fixed to each other by fastening elements (not illustrated). 
     The notch part  94   a  of the mounting frame  41  overlaps the notch part  94   b  of the mounting frame  42  when viewed from the side. In other words, the notch part  94   a  of the mounting frame  41  is located on the projection surface of the notch part  94   b  of the mounting frame  42  in the lateral direction X. 
     As illustrated in  FIGS.  1  and  2   , the support members  3  are members that extend in the vertical direction (longitudinal direction Y) and support the solar cell modules  2  with respect to the wall surface  200 , and as illustrated in  FIG.  10   , the support members  3  include rail parts  100   a  to  100   c , locking pieces  101 , and engagement parts  102 . 
     The rail parts  100   a  to  100   c  are rails attached across the plurality of framework portions  202  (see  FIG.  11   ) of the wall surface  200 , and are rails extending in the vertical direction (longitudinal direction Y). 
     As illustrated in  FIG.  10   , the rail parts  100   a  to  100   c  each include a base part  110  and a raised part  111  rising from the base part  110 . 
     The base part  110  is a part attached to the framework portions  202 , and includes: top end cover parts  120  and  121  covering top end surfaces of the framework portions  202  in the protruding direction thereof; and a side cover parts  122  and  123  covering the sides of the framework portions  202 . 
     The raised part  111  is a part rising from the base part  110 , and includes a support part  125  and vertical wall parts  126  and  127 . 
     The support part  125  is a part constituting an end face of the raised part  111  in the raised direction. 
     As illustrated in an enlarged view of  FIG.  10   , at the end in the raised direction, the support part  125  has the support surface  129  that spreads out substantially in the vertical direction. 
     As illustrated in  FIG.  10   , the vertical wall parts  126  and  127  are wall parts erected from the base part  110  and connected to both end parts, in the width direction, of the support part  125 . In other words, the support part  125  together with the top end cover parts  120  and  121  of the base part  110  constitute a step and continue in a step shape via the vertical wall parts  126  and  127 . 
     As in the enlarged view of  FIG.  10   , the locking piece  101  is a portion attached to the support surface  129  of the support part  125 . The locking piece  101  is engaged with the frame member  11  of the solar cell module  2 , and is a bracket that receives a load of the solar cell module  2 . 
     The locking piece  101  includes a fixed part  130  (connection part), a vertical wall part  131  (connection part), and the locking part  132 . 
     The fixed part  130  is a part fixed to the support surface  129  of the support part  125 . 
     The vertical wall part  131  is a wall part rising from the fixed part  130  in a crossing direction (orthogonal direction in the present embodiment) with respect to the fixed part  130 . 
     The locking part  132  is a part bent upward from an end part of the vertical wall part  131  in the rising direction, and forms a step together with the fixed part  130 , and continues in a step shape via the vertical wall part  131 . In other words, the locking part  132  faces the support surface  129  at an interval, and the locking part  132  and the support surface  129  are parallel to each other. 
     The engagement parts  102  are rotatably fixed to the support parts  125  by fastening elements, and the claw portions  140  and  141  can be engaged with the support-side wall part  91  of the mounting frame  41  to lock the solar cell module  2 . 
     The wall surface  200  constitutes an outer wall of a building and is a vertical wall rising substantially in the vertical direction (in the present embodiment, a direction orthogonal to a horizontal plane) with respect to a floor surface (horizontal plane). 
     As illustrated in  FIG.  11   , in the wall surface  200 , a plurality of framework groups  201   a  to  201   c  are parallelly provided in the lateral direction X (left-right direction) when viewed from the front. 
     The framework groups  201   a  to  201   c  are each configured with a plurality of framework portions  202  linearly arranged side by side in the longitudinal direction Y (vertical direction). The framework portions  202  are protruding portions each having a quadrangular prism shape and protruding forward with respect to the wall surface  200 . 
     Next, a typical construction method of the installation structure  1  will be described together with the positional relationship between the members. 
     First, as illustrated in  FIG.  11   , the rail parts  100   a  to  100   c  of the support members  3  are respectively placed on the framework portions  202  of the framework groups  201   a  to  201   c  of the wall surface  200  and are fixed. That is, the rail parts  100   a  to  100   c  are fixed to be parallelly disposed in the left-right direction (lateral direction X) such that the extending directions of the rail parts  100   a  to  100   c  are in the up-down direction (longitudinal direction Y) when the wall surface  200  is viewed from the front. 
     Regarding the locking pieces  101  at this time, as illustrated in  FIG.  10   , the fixed parts  130  are fixed in surface contact with the support surfaces  129  of the support parts  125 , the vertical wall parts  131  constitute bottom surfaces, and the locking parts  132  extend upward in the vertical direction. 
     Next, the locking parts  132  of the locking pieces  101  are inserted into the notch parts  94  of the solar cell module  2  and aligned in the lateral direction X (left-right direction) as illustrated in  FIG.  12   . Then, as necessary, as illustrated in  FIG.  13 A , the solar cell module  2  is inclined with respect to the support surfaces  129  (inclined posture), and the wiring portions  22   a  and  22   b  extending from the terminal boxes  21   a  and  21   b  of the solar cell module  2  are respectively inserted into the wiring holes  93   a  and  93   b.    
     At this time, the solar cell module  2  is inclined with respect to the wall surface  200 , and the locking parts  132  of the locking pieces  101  come into contact with the inclined surfaces of the second inner wall parts  97  of the notch parts  94   a  and  94   b  as in the enlarged view of  FIG.  13 A . 
     In the support members  3 , the locking parts  132  are inserted in the notch parts  94  to support the solar cell module  2  at a predetermined inclination angle θ 2  with respect to the support surfaces  129 . 
     The inclination angle θ 2  shown in the enlarged view of  FIG.  13 A  is more than or equal to 10 degrees and is preferably more than or equal to 30 degrees. In addition, the inclination angle θ 2  is less than 90 degrees and is more preferably less than or equal to 60 degrees. Within this range, the locking parts  132  are hardly fall off from the notch parts  94 . 
     Next, as illustrated in  FIG.  13 B , the solar cell module  2  is turned toward the wall surface  200  side to be in a state parallel to the wall surface  200  (support surfaces  129 ) (parallel posture), and the engagement parts  102  of the support members  3  in a posture along the extending direction of the support members  3  are turned to engage the claw portions  140  with the support-side wall parts  91  and  91  of the mounting frames  41  and  42  of the solar cell module  2 , so that the solar cell module  2  is installed on the wall surface  200 . 
     At this time, in the solar cell module  2 , the light receiving surface  23  is parallel to the wall surface  200 , and the first inner wall parts  96  face the locking parts  132  with intervals therebetween as in the enlarged view of  FIG.  13 B . 
     Next, the positional relationship between the members of the installation structure  1  will be described. 
     A first solar cell module  2   a  and a second solar cell module  2   b  adjacent to each other in the lateral direction X are electrically connected in series or in parallel. Specifically, as illustrated in  FIG.  15   , in the first solar cell module  2   a , the wiring portion  22   b  extending from the terminal box  21   b  passes through the wiring hole  93   b , further passes through the wiring hole  93   a  of the second solar cell module  2   b , and is connected to the wiring portion  22   a  extending from the terminal box  21   a  of the second solar cell module  2   b , on the back surface  24  side of the second solar cell module  2   b.    
     As illustrated in  FIG.  14   , the locking piece  101  of the support member  3  is inserted in and engaged across the notch part  94   b  of the mounting frame  42  of the first solar cell module  2   a  and the notch part  94   a  of the mounting frame  41  of the second solar cell module  2   b.    
     In the installation structure  1  of the present embodiment, as illustrated in  FIG.  1   , the solar cell modules  2   a  and  2   b  ( 2   c  and  2   d ) adjacent to each other in the lateral direction X are modules having the same length in the longitudinal direction Y. For the solar cell modules  2   a  and  2   c  ( 2   b  and  2   d ) adjacent to each other in the longitudinal direction Y, modules having different lengths in the longitudinal direction Y are used. Specifically, the length, in the longitudinal direction Y, of the solar cell modules  2   c  and  2   d  located in the lower stage is longer than the length, in the longitudinal direction Y, of the solar cell modules  2   a  and  2   b  located in the upper stage. 
     According to the installation structure  1  of the present embodiment, the locking parts  132  of the locking pieces  101  of the support members  3  are inserted into the notch parts  94  of the solar cell module  2  to support the solar cell module  2 . Therefore, the vertical load of the solar cell module  2  can be received by the locking pieces  101 , and the solar cell module  2  is less likely to fall off at the time of assembly, so that the solar cell module  2  can be assembled safely. 
     In addition, with the installation structure  1  of the present embodiment, the position of the solar cell module  2  in the height direction with respect to the wall surface  200  is determined by the locking pieces  101  of the support members  3 ; therefore it is easy to position the solar cell module  2 . 
     According to the installation structure  1  of the present embodiment, during the construction process, the solar cell module  2  is inclined relative to the support members  3 , along the inclined surfaces provided on the second inner wall parts  97  of the notch parts  94 . In this way, a space can be formed between the support surfaces  129  and the solar cell module  2  in a state where the solar cell module  2  is supported by the support members  3 ; therefore, maintenance of the terminal boxes  21   a  and  21   b  can be easily performed. 
     According to the installation structure  1  of the present embodiment, the mounting frames  41  and  42  have higher rigidity than the main body panel  20 , and also reinforce the main body panel  20 . Therefore, even if a load is applied by wind or the like, the main body panel  20  is hardly bent in the extending direction of the mounting frames  41  and  42 , and more hardly gets damaged. 
     According to the installation structure  1  of the present embodiment, the following members are separately provided: the holding frame  40  having the holding recesses  50   a ,  50   b ,  70   a , and  70   b  for holding the main body panel  20 ; and the mounting frames  41  and  42  having the support-side wall parts  91  mounted to the support members  3 . Therefore, the holding frame  40  and the mounting frames  41  and  42  can be replaced independently, and the maintenance cost can be reduced. 
     According to the installation structure  1  of the present embodiment, the panel-side wall parts  90  of the mounting frames  41  and  42  and the opposing wall parts  75  of the holding frame  40  are fixed in surface contact. Therefore, even when a load is applied by wind or the like, the mounting frames  41  and  42  are hardly fall off from the holding frame  40 . 
     According to the installation structure  1  of the present embodiment, the locking piece  101  of the support member  3  is inserted in and engaged across the notch part  94   b  of the mounting frame  42  of the first solar cell module  2   a  and the notch part  94   a  of the mounting frame  41  of the second solar cell module  2   b . Therefore, the number of components can be reduced. 
     According to the installation structure  1  of the present embodiment, the solar cell module  2  is supported on the single wall surface  200  by the plurality of rail parts  100   a  and  100   b  ( 100   b  and  100   c ) extending substantially in the vertical direction. Therefore, the solar cell module  2  is less likely to fall. 
     According to the installation structure  1  of the present embodiment, each of the rail parts  100   a  to  100   c  is connected to the plurality of framework portions  202  provided side by side in the vertical direction on the wall surface  200 . Therefore, the support member  3  is less likely to fall off from the wall surface  200 . 
     According to the installation structure  1  of the present embodiment, the vertical length of the rail parts  100   a  to  100   c  in the vertical direction is longer than or equal to the length of the solar cell module  2 , the mounting frames  41  and  42  extend along the extending direction of the rail parts  100   a  to  100   c , and the wiring portions  22   a  and  22   b  are spatially blocked by the rail parts  100   a  to  100   c  or the mounting frames  41  and  42 . 
     According to the installation structure  1  of the present embodiment, although such a structure is employed, the wiring portions  22   a  and  22   b  extending from the terminal boxes  21   a  and  21   b  respectively pass through the wiring holes  93   a  and  93   b  of the mounting frames  41  and  42  and extend to the outside of the mounting frames  41  and  42 . Therefore, the wiring portions  22   a  and  22   b  can be directly connected to an external power source or another solar cell module  2  without going around the mounting frames  41  and  42 . As a result, as compared with the case of going around the mounting frames  41  and  42 , the wiring portions  22   a  and  22   b  can be simply routed; therefore, the lengths of the wiring portions  22   a  and  22   b  can be shortened, and a construction time can be shortened. Therefore, the manufacturing cost can be reduced and the workability at the time of manufacturing is improved as compared with the case of going around the mounting frames  41  and  42 . 
     According to the installation structure  1  of the present embodiment, the wiring portions  22   a  and  22   b  are made to pass through the wiring holes  93   a  and  93   b ; therefore, the wiring holes  93   a  and  93   b  roughly determine positions of the wiring portions  22   a  and  22   b , and it is accordingly easy to position the wiring portions  22   a  and  22   b.    
     According to the installation structure  1  of the present embodiment, the wiring holes  93   a  and  93   b  through which the wiring portions  22   a  and  22   b  pass are formed in the second connection wall parts  92 ; therefore, the wiring portions  22   a  and  22   b  can be passed through at substantially the shortest distance, and the manufacturing cost can be accordingly reduced. 
     According to the installation structure  1  of the present embodiment, as illustrated in  FIG.  15   , the terminal box  21   b  of the first solar cell module  2   a  is off-centered toward the side of the second solar cell module  2   b , which is adjacent to the first solar cell module  2   a  in the lateral direction X (juxtaposing direction), and the terminal box  21   a  of the second solar cell module  2   b  is off-centered toward the first solar cell module  2   a . Therefore, the length of the wiring portion  22   b  extending from the terminal box  21   b  of the first solar cell module  2   a  and/or the length of the wiring portion  22   a  extending from the terminal box  21   a  of the second solar cell module  2   b  can be shortened, and the manufacturing cost can be reduced. 
     According to the installation structure  1  of the present embodiment, the wiring portions  22   a  and  22   b  are not located between the first solar cell module  2   a  and the second solar cell module  2   b ; therefore, the interval between the first solar cell module  2   a  and the second solar cell module  2   b  can be narrowed, and the number of solar cell modules  2  installed per unit area can be increased. Further, safety is high. 
     Next, an installation structure  300  according to a second embodiment of the present invention will be described. Note that the same components as in the installation structure  1  of the first embodiment are denoted by the same reference signs, and description thereof is omitted. 
     In the installation structure  300  of the second embodiment of the present invention, the holding recesses  50   a ,  50   b ,  70   a , and  70   b  of the holding frame  40  and the support-side wall parts  91  and  91  of the mounting frames  41  and  42  are composed of a single member. That is, as illustrated in  FIG.  16   , the installation structure  300  has a frame member  311 , and the frame member  311  has a function of holding a solar cell panel  10  and a function of attaching the solar cell panel  10  to support members  3 . 
     The installation structure  300  includes a plurality of solar cell modules  302  and the support members  3 . 
     As illustrated in  FIG.  16   , the solar cell module  302  includes the solar cell panel  10  and the frame member  311  as main constituent members. 
     The frame member  311  is a frame that holds a main body panel  20 , and is specifically a metal frame made of aluminum. 
     As illustrated in  FIG.  16   , the frame member  311  includes lateral frames  45  and  346  (mounting parts) and longitudinal frames  347  and  348  (mounting parts). 
     As illustrated in  FIG.  17   , the lateral frame  346  is a reinforcing frame extending in the lateral direction X along a lower side  27 , and also serves as a mounting part to be mounted to the support members  3 . 
     The lateral frame  346  includes a holding recess  50  and a space keeping piece  351 . 
     The space keeping piece  351  includes an opposing wall part  55  and a connection wall part  356 . 
     The connection wall part  356  is a wall part that connects a rear side cover part  53  and an opposing wall part  55 , and includes a notch part  394  (mounting-side engagement part). 
     As illustrated in  FIG.  17   , the notch part  394  is a notch provided at a lower end part of the connection wall part  356  in the vertical direction, and is an engagement part engageable with the locking parts  132  of the support members  3 . 
     The notch part  394  is a notched groove provided over the entire connection wall part  356  in the longitudinal direction. 
     The notch part  394  has a width in the thickness direction of the solar cell panel  10 , has a length in the thickness direction of the connection wall part  356 , and has a depth extending upward in the vertical direction. 
     Similarly to the notch part  94  of the first embodiment, the notch part  394  has a trapezoidal cross-sectional shape, and includes a bottom wall part  95 , a first inner wall part  96 , and a second inner wall part  97 . 
     As illustrated in  FIG.  18   , the longitudinal frames  347  and  348  are reinforcing frames extending in the longitudinal direction Y along the longitudinal sides  28  and  29 , and also serve as mounting parts to be mounted to the support members  3 . 
     As illustrated in  FIGS.  17  and  18   , the longitudinal frames  347  and  348  each include a holding recess  70 , a space keeping piece  371 , and coupling parts  77  and  78 . 
     Each of the space keeping pieces  371  includes an opposing wall part  75  and a connection wall part  376 . 
     Each of the connection wall parts  376  is a wall part that connects a rear side cover part  73  and an opposing wall part  75 , and each include one of wiring holes  493   a  and  493   b  and one of notch parts  494   a  and  494   b  (mounting-side engagement part). 
     As illustrated in  FIG.  18   , the wiring holes  493   a  and  493   b  are through holes respectively provided at middle parts of the longitudinal frames  347  and  348  in the longitudinal direction and penetrating through the connection wall parts  376  and  376  in the thickness direction. 
     The wiring holes  493   a  and  493   b  respectively allow the connector portions  30   a  and  30   b  of the wiring portions  22   a  and  22   b  extending from the terminal boxes  21   a  and  21   b  to pass therethrough. 
     Each of the notch parts  494   a  and  494   b  is a notch provided at a lower end part, in the vertical direction, of one of the connection wall parts  376 , and is an engagement part engageable with the locking parts  132  of the support members  3 . 
     The notch parts  494   a  and  494   b  have a width in the thickness direction of the solar cell panel  10 , have a length in the thickness direction of the connection wall parts  376 , and have a depth extending upward in the vertical direction. 
     Similarly to the notch parts  94  of the first embodiment, each of the notch parts  494   a  and  494   b  has a trapezoidal cross-sectional shape, and includes a bottom wall part  95 , a first inner wall part  96 , and a second inner wall part  97 . 
     Next, a description will be given on the positional relationship between the members of the solar cell module  302 . 
     As illustrated in  FIG.  16   , the connection wall part  356  of the lateral frame  346  and the connection wall parts  376  and  376  of the longitudinal frames  347  and  348  form the same plane and form a bottom surface of the solar cell module  302 . 
     Internal spaces of the notch part  394  of the lateral frame  346  and the notch parts  494   a  and  494   b  of the longitudinal frames  347  and  348  are continuous with each other so as to form a single engagement groove  399  (mounting-side engagement part). Specifically, when viewed from the side, the lateral frame  346  and the longitudinal frames  347  and  348  have overlapping parts between the notch part  394  and the notch parts  494   a  and  494   b , and the engagement groove  399  extends across the connection wall part  356  of the lateral frame  346  and the connection wall parts  376  and  376  of the longitudinal frames  347  and  348 . The engagement groove  399  has a continuous internal space in the extending direction and is open to the outside. 
     According to the installation structure  300  of the second embodiment, the holding recesses  50   a ,  50   b ,  70   a , and  70   b  of the holding frame  40  and the support-side wall parts  91  and  91  of the mounting frames  41  and  42  of the first embodiment are configured with a single member (frame member  311 ); therefore, the number of parts can be reduced, and workability can be improved as compared with the conventional art. 
     According to the installation structure  300  of the second embodiment, the engagement groove  399  as a notched groove is provided across the lateral frame  346  and the longitudinal frames  347  and  348 . Therefore, the solar cell module  2  can be moved in the extending direction of the engagement groove  399  by temporarily placing the solar cell module  2  in the middle of construction in a state where the locking parts  132  of the locking pieces  101  of the support members  3  is inserted in the engagement groove  399 . As a result, alignment in the lateral direction X is easy. 
     In the above-described embodiments, the inclined surfaces are provided on the second inner wall parts  97 , but the present invention is not limited to this configuration. As illustrated in  FIG.  19   , the first inner wall part  96  may be provided with an inclined surface. 
     In the above-described embodiments, the inclined surfaces are provided on the entire surfaces of the second inner wall parts  97 , but the present invention is not limited to this configuration. The inclined surface may be only partially formed on each of the second inner wall parts  97  or the first inner wall parts  96 . 
     In the above-described embodiments, the wiring holes  93   a  and  93   b  penetrating through the second connection wall parts  92  and  92  in the thickness direction are provided, but the present invention is not limited to this configuration. As illustrated in  FIG.  20   , there may be provided a notch part  593  (penetration part) that extends from the back side to the second connection wall parts  92  and  92  and penetrates from the inside to the outside with reference to the terminal box  21  when the light receiving surface  23  is viewed from the front. 
     In the above-described embodiments, the two terminal boxes  21   a  and  21   b  are provided on the back surface  24  of the solar cell panel  10 , but the present invention is not limited thereto. On the back surface  24  of the solar cell panel  10 , there may be provided one terminal box  21  or may be provided with three or more terminal boxes  21 . 
     In the above-described embodiments, the claw portions  140  and  141  of the engagement parts  102  sandwich the support-side wall parts  91  together with the support surfaces  129 , thereby fixing the solar cell module  2 , but the present invention is not limited to this configuration. The support-side wall parts  91  may be fixed to the solar cell module  2  by fastening elements. 
     In the above-described embodiments, the length, in the longitudinal direction Y, of the solar cell modules  2   c  and  2   d  located in the lower stage is longer than the length, in the longitudinal direction Y, of the solar cell modules  2   a  and  2   b  located in the upper stage, but the present invention is not limited to this configuration. The length, in the longitudinal direction Y, of the solar cell modules  2   c  and  2   d  located in the lower stage may be equal to or may be shorter than the length, in the longitudinal direction Y, of the solar cell modules  2   a  and  2   b  located in the upper stage. 
     In the above-described embodiments, the wiring holes  93   a  and  93   b  ( 493   a  and  493   b ) are provided in the central parts of the second connection wall parts  92  in the longitudinal direction Y. However, the present invention is not limited to this configuration, and the positions of the wiring holes  93   a  and  93   b  ( 493   a  and  493   b ) may be changed in accordance with the positions of the terminal boxes  21   a  and  21   b . For example, when the terminal boxes  21   a  and  21   b  are off-centered toward an end side in the longitudinal direction Y, the positions of the wiring holes  93   a  and  93   b  ( 493   a  and  493   b ) may also be off-centered toward the end side in accordance with the positions of the terminal boxes  21   a  and  21   b.    
     In the above-described embodiments, the wiring holes  93   a  and  93   b  ( 493   a  and  493   b ) are disposed at the positions corresponding to the terminal boxes  21   a  and  21   b  in the longitudinal direction Y, but the present invention is not limited to this configuration. The wiring holes  93   a  and  93   b  ( 493   a  and  493   b ) may be disposed at positions shifted from the terminal boxes  21   a  and  21   b  in the longitudinal direction Y. 
     In the above-described second embodiment, the wiring holes  493   a  and  493   b  are provided in the connection wall parts  376  and  376  of the longitudinal frames  347  and  348 , but the present invention is not limited to this configuration. For example, in a case where the solar cell modules  2  and  2  adjacent to each other in the longitudinal direction Y are electrically connected to each other, the lateral frames  45  and  346  may be provided with the wiring holes  493   a  and  493   b.    
     In the above-described embodiments, each component can be freely replaced or added between the embodiments as long as the replacement and the addition are included in the technical scope of the present invention. 
     EXPLANATION OF REFERENCE SIGNS 
       1 ,  300 : installation structure 
       2 ,  302 : solar cell module 
       2   a : first solar cell module 
       2   b : second solar cell module 
       3 : support member 
       10 : solar cell panel 
       11 ,  311 : frame member 
       20 : main body panel 
       21   a ,  21   b : terminal box 
       22   a ,  22   b : wiring portion (wiring parts) 
       24 : back surface 
       40 : holding frame 
       41 ,  42 : mounting frame (mounting part) 
       70 ,  70   a ,  70   b : holding recess 
       90 : panel-side wall part 
       91 : support-side wall part 
       92 : second connection wall part 
       93 ,  93   a ,  93   b ,  493   a ,  493   b : wiring hole (penetration part) 
       100   a  to  100   c : rail part 
       132 : locking part 
       200 : wall surface 
       346 : lateral frame (mounting part) 
       347 ,  348 : longitudinal frame (mounting part) 
       593 : notch part (penetration part)