Roof structure

Abstract

The present invention provides a roof structure that makes it possible to more safely perform maintenance on a specific solar battery module when the solar battery module has been fixed to a roof backing.　According to the present invention, an eave-side fitting includes a fixing fitting, an engagement fitting, and a temporary fastening element. The fixing fitting has a light reception side–covering part that covers a light reception surface of a solar battery module and an end surface side–covering part that covers an eave-side end surface. The engagement fitting has a back surface side–covering part that covers a back surface side of the solar battery module and an engagement part that rises from the back surface side–covering part. The engagement part overlaps the end surface side–covering part in an eave-to-ridge direction. The temporary fastening element can be operated further toward the eave than the engagement part and has a shaft part that is inserted into where the engagement part and the end surface side–covering part overlap to fix the end surface side–covering part to the engagement part. The engagement part receives the dead weight of the solar battery module and the fixing fitting.

Description

Roof structure

[0001] The present invention relates to a roof structure having solar cell modules mounted thereon.

[0002] BACKGROUND ART Conventionally, roof structures in which solar cell modules are laid on a roof substrate have been known (for example, see Patent Document 1).

[0003] The roof structure described in Patent Document 1 is constructed by fixing two divided pieces with temporary fastening elements to the eaves side frame portion that holds the eaves side end of the solar cell module, and by removing the temporary fastening elements and disassembling the divided pieces, it is possible to remove the solar cell module while it is installed on the roof base together with other solar cell modules.

[0004] Patent No. 6779031

[0005] However, in the roof structure described in Patent Document 1, if the temporary fastening element loosens, the two disassembled pieces may come apart, causing the solar cell module to fall off the roof. Furthermore, when the temporary fastening element is released to replace the solar cell module, the solar cell module may move toward the ridge of the roof due to its own weight, causing it to fall off the eaves. From the perspective of eliminating these possibilities, there was room for further improvement in Patent Document 1.

[0006] Therefore, an object of the present invention is to provide a roof structure that allows maintenance of a specific solar cell module to be carried out safely while the solar cell module is fixed to the roof substrate, as compared to conventional methods.

[0007] One aspect of the present invention for solving the above-mentioned problems is a roof structure having a solar cell module and an eaves-side fitting, wherein the eaves-side end of the solar cell module is held by the eaves-side fitting and the solar cell module is fixed to a roof substrate, the eaves-side fitting having a fixing fitting, a locking fitting, and a temporary fastening element, the fixing fitting having a light-receiving side covering part that covers the light-receiving surface of the solar cell module and an end face side covering part that covers the eaves-side end face of the solar cell module, the locking fitting having a fixing part that fixes the solar cell module to the roof substrate, The roof structure has a back side covering portion that covers the back side of the battery module, and a locking portion that rises from the back side covering portion in a direction intersecting the eaves ridge direction, the locking portion of the locking fitting overlaps with the end face side covering portion in the eaves ridge direction, the temporary fastening element can be operated from the eaves side of the locking portion, and the shaft portion is inserted into the overlapping portion of the locking portion and the end face side covering portion to fix the end face side covering portion to the locking portion, and the locking portion supports the weight of the solar cell module and the fixing fitting.

[0008] According to this aspect, the fixing bracket can be removed from the locking portion by releasing the temporary fastening element, allowing for easy maintenance of the solar cell module while the solar cell module is installed on the roof underlayment. According to this aspect, the weight of the solar cell module and the locking bracket is supported by the locking portion, so even if the temporary fastening element is released, the solar cell module and the locking bracket can be locked by the locking portion, preventing the solar cell module from falling. According to this aspect, the weight of the solar cell module is supported by the locking portion, so even if the fixing bracket is released, the solar cell module is locked by the locking portion and is unlikely to fall in an unloaded state, allowing for safe maintenance of the solar cell module.

[0009] In a preferred aspect, the locking portion protrudes upward beyond the light-receiving-side cover portion of the fixing metal fitting.

[0010] In a preferred aspect, the length of the engagement portion extending from the light-receiving-side cover portion of the fixing metal fitting is 1.3 cm or more.

[0011] In a preferred aspect, the solar cell module can be replaced non-destructively when the fixing metal fittings are removed from the locking metal fittings.

[0012] In a preferred aspect, the distance between the locking portion of the locking fitting and the eaves-side end face of the solar cell module is 0.20 cm or more.

[0013] According to this aspect, the movable range of the solar cell module can be ensured.

[0014] A preferred aspect is to have a second solar cell module located on the eaves side of the solar cell module and partially covered by the solar cell module, and the back side covering portion of the locking fitting is sandwiched between the second solar cell module and the solar cell module.

[0015] In a preferred aspect, a mounting bracket is attached to the roof substrate, and the ridge side end of the second solar cell module is sandwiched and held by the mounting bracket and the back side cover portion of the fastening bracket.

[0016] The above aspects may be made dependent on each other, or some of the configurations may be quoted or substituted for each other, as long as they are included in the technical scope of the present invention.

[0017] According to the present invention, maintenance of a specific solar cell module can be carried out safely while the solar cell module is fixed to a roof substrate, as compared to the prior art.

[0018] 1 is a perspective view schematically showing a roof structure of a first embodiment of the present invention. FIG. 1 is a perspective view of a main part of the roof structure of FIG. 1. FIG. 2 is a perspective view of a main part of the roof structure with the solar cell module omitted. FIG. 1 is a cross-sectional view of the roof structure of FIG. 1. FIG. 4 is an enlarged cross-sectional view of a main part of the roof structure of FIG. 4. FIG. 2 is a perspective view of the roof member of FIG. 2. FIG. 2 is a perspective view of the mounting bracket of FIG. 2. FIG. 2 is a perspective view of the holding bracket of FIG. 2. FIG. 8 is an exploded perspective view of the holding bracket of FIG. 8. FIG. 9 is an exploded perspective view of the locking bracket of FIG. 9 as seen from the ridge side. FIG. 9 is an exploded perspective view of the fixing bracket of FIG. 9 as seen from the ridge side. FIG. 2 is a perspective view of the fixing member of FIG. 2. FIG. 10 is an explanatory view of replacing a solar cell module in the roof structure of FIG. 1, where (a) is a cross-sectional view of removing the fixing bracket, and (b) is a cross-sectional view of removing a used solar cell module. FIG. 11 is an explanatory view of replacing a solar cell module in the roof structure of FIG. 1, where (a) is a cross-sectional view of installing a new solar cell module, and (b) is a cross-sectional view of fixing the fixing bracket. FIG. 12 is a perspective view showing the roof structure of FIG. 1 with snow piled up. FIG. 13 is a perspective view of a main part of a roof structure of another embodiment of the present invention.

[0019] Hereinafter, embodiments of the present invention will be described in detail.

[0020] As shown in Figure 1, the roof structure 1 of the first embodiment of the present invention constitutes a roof that slopes in the eaves direction Y, such as a gable roof or hip roof of a house, and as shown in Figures 1 and 2, a plurality of roof members 3 are mainly laid on a roof substrate 200 of the house, and a plurality of solar cell modules 2 are installed on the laid roof members 3. As shown in Figures 2 to 4, the roof structure 1 comprises, as main components, solar cell modules 2, roof members 3, mounting brackets 5, holding brackets 6 (eaves-side brackets), fixing members 7, mounting fastening elements 10, holding fastening elements 11, and fixing fastening elements 12.

[0021] <Solar cell module 2> As shown in Fig. 2, the solar cell module 2 is a plate-like module that extends in a planar shape, has a light-receiving surface 20 and a back surface 21, and is a photoelectric conversion module that converts light energy received by the light-receiving surface 20 into electrical energy. The solar cell module 2 is provided with a terminal box 22 on the back surface 21, and two cable portions 23a, 23b extend from the terminal box 22. As can be seen from Fig. 2, the solar cell module 2 has a horizontally elongated rectangular shape with the longitudinal direction X as the horizontal direction when the light-receiving surface 20 is viewed in plan.

[0022] <Roofing member 3> The roofing member 3 is a member that prevents water and the like from entering the roof underlayment 200. The roofing member 3 is not particularly limited, but is preferably a fireproof roofing material having fire resistance, and for example, stainless steel plate, aluminum steel plate, Galvalume steel plate (registered trademark), etc. can be used.

[0023] As shown in FIG. 6 , the roof member 3 includes a roof main body portion 30 , an eaves-side engaging portion 31 , and a ridge-side engaging portion 32 .

[0024] As can be seen from Figures 3 and 6, the roof main body portion 30 is a plate-like portion that extends in a planar shape. In this embodiment, it is a rectangular portion with a long side extending in the girder direction X and a short side extending in the eaves-ridge direction Y. As shown in Figure 6, the roof main body portion 30 has a flat portion 35 and an inclined portion 36 inclined at a predetermined angle relative to the flat portion 35. The flat portion 35 has a roof-side insertion hole 37 through which the shank of the mounting fastening element 10 (see Figure 3) can be inserted. The roof-side insertion hole 37 is a through hole that penetrates in the thickness direction and is a casting hole formed by casting the mounting fastening element 10. The flat portion 35 is a portion that comes into surface contact with the roof underlayment 200, as shown in Figure 5. The inclined portion 36 is located closer to the eaves than the flat portion 35 and is inclined upward from the flat portion 35.

[0025] As shown in FIG. 4 , the eaves-side engagement portion 31 is a portion that can engage with the ridge-side engagement portion 32 of the roof element 3 adjacent to the eaves side. The eaves-side engagement portion 31, together with the roof main body portion 30, is a portion that forms a U-shape in side view and is a folded portion that is folded downward from the eaves-side end of the roof main body portion 30. The eaves-side engagement portion 31 includes a first connecting wall portion 40 that is bent downward from the eaves-side end of the roof main body portion 30, and a first opposing wall portion 41 that is bent from the end of the first connecting wall portion 40 in the bending direction toward the ridge side. The first connecting wall portion 40 is a wall portion that connects the eaves-side end of the roof main body portion 30 to the eaves-side end of the first opposing wall portion 41. The first opposing wall portion 41 is a wall portion that faces the roof main body portion 30 at a distance on the lower side of the roof main body portion 30 and is a convex portion that protrudes from the first connecting wall portion 40 toward the ridge side.

[0026] As shown in FIG. 4 , the ridge-side engaging portion 32 is a portion that can engage with the eaves-side engaging portion 31 of the adjacent roof element 3 on the ridge side. The ridge-side engaging portion 32 is a portion that, together with the roof main body portion 30, forms a U-shape in side view and is a folded portion that is folded upward from the ridge-side end of the roof main body portion 30. In other words, the ridge-side engaging portion 32 is folded in the opposite direction to the eaves-side engaging portion 31. The ridge-side engaging portion 32 includes a second connecting wall portion 45 that is folded upward from the ridge-side end of the roof main body portion 30, and a second opposing wall portion 46 that is folded from the end of the second connecting wall portion 45 in the folding direction toward the eaves side. The second connecting wall portion 45 is a wall portion that connects the ridge-side end of the roof main body portion 30 to the ridge-side end of the second opposing wall portion 46. The second opposing wall portion 46 is a wall portion that faces the roof main body portion 30 on the upper side of the roof main body portion 30, and is a convex portion that protrudes from the second connecting wall portion 45 toward the eaves side.

[0027] 2 and 3, the mounting bracket 5 is used to mount the solar cell module 2 to the roof underlayment 200. As shown in Fig. 2, the mounting bracket 5 can hold the eaves side end 25 of the solar cell module 2 together with the holding bracket 6, and can also directly hold the ridge side end 26 of the solar cell module 2.

[0028] The mounting bracket 5 is attached across adjacent roof members 3, 3 in the eaves-ridge direction Y, as shown in Figure 3. The mounting bracket 5 includes a fixed wall portion 50, a standing wall portion 51, a covering wall portion 52, a first buffer portion 53, a second buffer portion 54, a fixed-side insertion hole 55, and a holding fastening hole 56, as shown in Figure 7.

[0029] (Fixed wall portion 50) As shown in Figure 5, the fixed wall portion 50 is a wall portion that is placed on the roof member 3A on the eaves side via the first buffer portion 53 and fixed to the roof underlayment 200 via the mounting fastening element 10.

[0030] (Standing wall portion 51) The standing wall portion 51 is a wall portion that rises upward from the ridge side end of the fixed wall portion 50, and is a connecting wall portion that connects the ridge side end of the fixed wall portion 50 and the eaves side end of the covering wall portion 52.

[0031] (Covering wall portion 52) As shown in Fig. 5, the covering wall portion 52 is a wall portion that covers the roof element 3B adjacent to the ridge side of the roof element 3A on which the fixed wall portion 50 is placed. As shown in Figs. 5 and 7, the covering wall portion 52 is an extension portion that extends from the upper end of the standing wall portion 51 toward the ridge side, and is supported in a cantilevered manner by the standing wall portion 51.

[0032] (First buffer portion 53) The first buffer portion 53 is provided on the underside of the fixed wall portion 50 (the surface facing the roof member 3), and is a member that prevents the fixed wall portion 50 from colliding with the roof member 3. The first buffer portion 53 is an elastic body having elasticity, and is a plate-like portion that has a width in the eaves-ridge direction Y and extends in the girder direction X.

[0033] 5 , the second buffer portion 54 is a gasket that is provided on the upper surface of the covering wall portion 52 and supports the back surface 21 of the solar cell module 2A (second solar cell module) on the eaves side, and is a member that prevents the back surface 21 of the solar cell module 2A on the eaves side from contacting the covering wall portion 52. The second buffer portion 54 is an elastic body that has elasticity and is a plate-like portion that has a width in the eaves-ridge direction Y and extends in the girder direction X.

[0034] (Fixed-side insertion hole 55) As shown in Figure 7, the fixed-side insertion hole 55 is a through hole that penetrates the fixed wall portion 50 and the first buffer portion 53 in the thickness direction, and is capable of inserting the shaft portion of the mounting fastening element 10 (see Figure 5).

[0035] (Retention Fastening Hole 56) The retention fastening hole 56 is a fixing hole that fixes the retention fitting 6 via the retention fastening element 11 (see FIG. 5 ). The retention fastening hole 56 is a fastening receiving portion that can be fastened to the shank of the retention fastening element 11, and is also a through-hole that penetrates in the thickness direction.

[0036] 2 and 3, the holding fitting 6 is a member that holds the eaves-side end 25 of the solar cell module 2, and also holds the ridge-side end 26 of the solar cell module 2 together with the mounting fitting 5. The holding fitting 6 includes a locking fitting 60, a fixing fitting 61, a fixing fastening element 62, and an eaves-side holding recess 63, as shown in FIGS.

[0037] (Lock fitting 60) The lock fitting 60 is a member that prevents the solar cell module 2 from moving toward the eaves side, and as shown in Figures 9 and 10, it has a locking main body portion 65, a ridge side buffer portion 66, and an eaves side buffer portion 67.

[0038] As shown in Figure 10, the locking main body 65 has a fixed wall portion 70, a standing wall portion 71, a covering wall portion 72 (back side covering portion), a locking wall portion 73 (locking portion), a water passage hole 75, and a holding side insertion hole 76.

[0039] The fixed wall portion 70 is a wall portion that is placed on the covering wall portion 52 of the mounting bracket 5 as shown in FIG. 5 and is fixed to the mounting bracket 5 via the retaining fastening element 11 .

[0040] As shown in Figures 9 and 10, the vertical wall portion 71 is a vertical wall portion that rises from the eaves side end of the fixed wall portion 70, and is a connecting wall portion that connects the eaves side end of the fixed wall portion 70 and the ridge side end of the covering wall portion 72.

[0041] 9 and 10, the covering wall portion 72 is an extension portion that extends from the end portion in the rising direction of the standing wall portion 71 toward the eaves side, and is a back surface side covering portion that covers the back surface 21 side of the solar cell module 2B on the ridge side as shown in Fig. 5, and is also a light receiving surface side covering portion that covers the light receiving surface 20 side of the solar cell module 2A on the eaves side. The covering wall portion 72 is connected to the fixed wall portion 70 in a stepped manner with a step interposed between them via the standing wall portion 71.

[0042] 9 and 10, the locking wall portion 73 is an upright wall portion that rises upward from the eaves-side end of the covering wall portion 72, and is an end face covering portion that covers the end face side of the solar cell module 2 as shown in Fig. 5. As shown in Fig. 9, the locking wall portion 73 has a locking-side insertion hole 77 through which the shaft portion (see Fig. 6) of the fixing fastening element 62 can be inserted. The locking-side insertion hole 77 is a through-hole that penetrates in the thickness direction midway in the rising direction.

[0043] 10, the water passage hole 75 is a cutout provided across the covering wall portion 72 and the locking wall portion 73, and is a portion that allows water and the like that accumulates in the corner between the covering wall portion 72 and the locking wall portion 73 to flow toward the eaves side. The water passage hole 75 is a through-hole that penetrates the covering wall portion 72 and the locking wall portion 73 in the thickness direction.

[0044] 10 , the retaining-side through-hole 76 is an elongated hole provided between the fixed wall portion 70 and the standing wall portion 71, extending in the eaves-ridge direction Y, and serves as an engaging hole through which the shank of the retaining fastening element 11 can be inserted and which can engage with the head of the retaining fastening element 11. The retaining-side through-hole 76 is a through-hole that penetrates each of the fixed wall portion 70 and the standing wall portion 71 in the thickness direction, and has a groove-like shape in which a first hole portion 80 having a width (length in the girder direction X) larger than that of the head of the retaining fastening element 11 and a second hole portion 81 having a width (length in the girder direction X) smaller than that of the head of the retaining fastening element 11 are aligned in the eaves-ridge direction Y. Therefore, the retaining-side through-hole 76 allows the retaining fitting 6 to be fixed to the mounting fitting 5 by hooking the first hole portion 80 onto the head of the retaining fastening element 11 and then moving it to the second hole portion 81 to tighten the retaining fastening element 11.

[0045] 10 , the first hole 80 is a rectangular hole provided in the standing wall 71. The second hole 81 is an elongated hole provided in the fixed wall 70, extending in the eaves-ridge direction Y, and is located on the ridge side of the first hole 80.

[0046] As shown in Figures 9 and 10 , the ridge-side buffer portion 66 is a gasket provided at the corner formed by the standing wall portion 71 and the covering wall portion 72, and has an "L"-shaped cross section extending in the longitudinal direction X. The ridge-side buffer portion 66 is an elastic body having elasticity, and as shown in Figure 10 , includes a light-receiving-side buffer portion 95, an end-side buffer portion 96, and a buffer cutout portion 97. As shown in Figure 5 , the light-receiving-side buffer portion 95 is provided on the underside of the covering wall portion 72 and prevents the light-receiving surface 20 of the eaves-side solar cell module 2A from contacting the covering wall portion 72. The end-side buffer portion 96 is provided on the eaves side of the standing wall portion 71 and extends downward from the ridge-side end of the light-receiving-side buffer portion 95. This prevents the ridge-side end 26 of the eaves-side solar cell module 2A from contacting the standing wall portion 71. As can be seen from Figure 10, the buffer notch 97 is a notch formed by cutting the end face side buffer section 96 and the light receiving side buffer section 95 upward, and is positioned to match the position of the second hole section 81 of the holding side insertion hole 76.

[0047] As shown in Figure 10, the eaves-side buffer portion 67 is a gasket with a generally "L"-shaped cross section extending in the girder direction X. The eaves-side buffer portion 67 is an elastic body having elasticity and includes a back-side buffer portion 100 and an end-side buffer portion 101. As shown in Figure 5, the back-side buffer portion 100 supports the back surface 21 of the ridge-side solar cell module 2B and prevents the back surface 21 from contacting the covering wall portion 72, and is adhered to the covering wall portion 72. The end-side buffer portion 101 stands upright from the end portion on the eaves side of the back-side buffer portion 100 and prevents the eaves-side end surface of the ridge-side solar cell module 2B from contacting the locking wall portion 73, as shown in Figure 5. The base end of the end-side buffer portion 101 is connected to the back-side buffer portion 100 midway in the eaves-ridge direction Y, and the tip end is a free end.

[0048] (Fixing Metal Fitting 61) As shown in FIG. 11, the fixing metal fitting 61 includes a fixing main body portion 85 and an eaves-side buffer portion 86.

[0049] The fixing main body portion 85 has an "L"-shaped cross section and is an elongated body extending in the longitudinal direction X. The fixing main body portion 85 includes a light-receiving side covering portion 90 and an end face side covering portion 91. As shown in FIG. 5 , the light-receiving side covering portion 90 is a portion that covers the light-receiving surface 20 of the ridge-side solar cell module 2B. The end face side covering portion 91 is erected downward from the eaves-side end of the light-receiving side covering portion 90 and is a portion that covers the eaves-side end face of the ridge-side solar cell module 2B. As shown in FIG. 9 , the end face side covering portion 91 includes a fixing side fastening hole 92. The fixing side fastening hole 92 is a through-hole that penetrates the end face side covering portion 91 in the thickness direction and is a fastening receiving portion that can be fastened with a shaft portion of the fixing fastening element 62.

[0050] (Eaves-side buffer portion 86) As shown in Figure 11, the eaves-side buffer portion 86 is a gasket with an inverted U-shaped cross section extending in the girder direction X. The eaves-side buffer portion 86 is an elastic body having elasticity and includes a battery-side buffer portion 105, a protective buffer portion 106, and a folded-back buffer portion 107. Each of the buffer portions 105-107 forms a buffer recess 108. As shown in Figure 5, the battery-side buffer portion 105 is provided on the ridge-side solar cell module 2B side of the light-receiving-side cover portion 90. It supports the light-receiving surface 20 of the ridge-side solar cell module 2B and prevents the light-receiving surface 20 from contacting the light-receiving-side cover portion 90. The protective buffer portion 106 is a rising portion that rises upward from the ridge-side end of the battery-side buffer portion 105 and protects the ridge-side end of the light-receiving-side cover portion 90. The folded buffer portion 107 is an extension portion that extends from the upper end of the protective buffer portion 106 toward the eaves side, and is a portion that covers the upper surface of the light-receiving side cover portion 90. The buffer recess 108 is a recess into which the light-receiving side cover portion 90 of the fixed main body portion 85 can be inserted.

[0051] (Fixing fastening element 62) As shown in Figure 9, the fixing fastening element 62 is a fixing member that fixes the fixing fitting 61 to the locking fitting 60 in a non-destructive and detachable manner, and specifically is a temporary fastening element having a head and a shaft.

[0052] (Eaves side holding recess 63) As shown in Figures 5 and 8, the eaves side holding recess 63 is a portion that holds the eaves side end 25 of the ridge side solar cell module 2B, and is a recess with the locking wall portion 73 as its bottom that is open toward the ridge side, and is a recess groove that extends in the girder direction X.

[0053] <Fixing member 7> As shown in Fig. 4, the fixing member 7 is a member that engages with the roof member 3 and fixes the roof member 3 to the roof underlayment 200. As shown in Fig. 12, the fixing member 7 has a fixing wall portion 110, a connecting wall portion 111, and an engaging wall portion 112, and the fixing wall portion 110 and the engaging wall portion 112 are connected in a stepped manner with a step interposed between them via the connecting wall portion 111.

[0054] (Fixing wall portion 110) The fixing wall portion 110 is a plate portion that is fixed to the roof underlayment 200 via the fixing fastening element 12 (see FIG. 4). As shown in FIG. 12, the fixing wall portion 110 has an insertion hole 115 that penetrates in the thickness direction and through which the shaft portion of the fixing fastening element 12 can be inserted.

[0055] (Connecting Wall 111) As shown in FIG. 12, the connecting wall 111 is a wall that connects the eaves-side end of the fixed wall 110 and the ridge-side end of the engaging wall 112.

[0056] (Engagement wall portion 112) As shown in Figure 12, the engagement wall portion 112 is a U-shaped portion in side view and includes a main body wall portion 120, a connecting wall portion 121, and an opposing wall portion 122, with the walls 120-122 forming an engagement recess 123. The main body wall portion 120 is a plate-like extension extending from the connecting wall portion 111 toward the eaves side. The connecting wall portion 121 is a wall portion that connects the eaves side end of the main body wall portion 120 with the eaves side end of the opposing wall portion 122. The opposing wall portion 122 is a wall portion that faces the main body wall portion 120 with a gap in between. The engagement recess 123 is a recessed groove that opens toward the ridge side and extends in the longitudinal direction X.

[0057] <Mounting fastening element 10> As shown in Figures 3 and 5, the mounting fastening element 10 is a component that fixes the mounting bracket 5 and the roof member 3 to the roof underlayment 200, and specifically, is a fastening element having a head and a shaft.

[0058] <Retaining Fastening Element 11> As shown in Figs. 3 and 5, the retaining fastening element 11 is a member that fixes the retaining fitting 6 to the mounting fitting 5, and specifically, is a fastening element that has a head and a shaft.

[0059] <Fixing Fastening Element 12> As shown in FIG. 4, the fixing fastening element 12 is a member that fixes the fixing member 7 to the roof underlayment 200, and specifically, is a fastening element having a head and a shaft.

[0060] Next, the positional relationship between the components of the roof structure 1 of this embodiment will be described.

[0061] As shown in Fig. 3 , the roof structure 1 has multiple roof elements 3 arranged in layers on a roof underlayment 200. As shown in Fig. 4 , the fixing element 7 has a fixing wall portion 110 placed on the roof underlayment 200, and the shanks of the fixing fastening elements 12 are inserted into the insertion holes 115 to fix the engaging wall portion 112 in a cantilevered manner. As shown in Fig. 5 , the flat portion 35 of the roof element 3 is in surface contact with the roof underlayment 200, and the inclined portion 36 extends from the flat portion 35 toward the eaves side. As shown in Fig. 4 , the eaves-side engaging portion 31 engages with the engaging wall portion 112 of the fixing element 7, and the ridge-side engaging portion 32 engages with the engaging wall portion 112 of the fixing element 7 adjacent to the fixing element 7 on the ridge side, thereby fixing the eaves-side and ridge-side portions of the roof element 3 to the roof underlayment 200. Therefore, the roof member 3 has its eaves side portion restricted from moving upward by the roof member 3 adjacent to the eaves side and the fixing member 7, and its ridge side portion has its upward movement restricted by the fixing member 7.

[0062] In this way, each roof element 3 is fixed to the roof underlayment 200 by each fixing element 7, and adjacent roof elements 3, 3 are laid so that they engage with each other at their overlapping portions in the eaves-ridge direction Y.

[0063] As shown in Figure 5, the mounting bracket 5 is installed across adjacent roof elements 3A and 3B in the eaves-ridge direction Y. The fixing wall portion 50 of the mounting bracket 5 is placed on the roof element 3A with the first buffer portion 53 sandwiched therebetween, and the covering wall portion 52 covers the upper side of the roof main body portion 30 of the roof element 3B. The mounting fastening element 10 has its shank inserted into the fixing-side insertion hole 55 and then inserted into the roof-side insertion hole 37 of the roof main body portion 30 of the roof element 3A, and is fixed to the roof underlayment 200.

[0064] As shown in Figure 5, the retaining bracket 6 has the fixed wall portion 70 placed on the covering wall portion 52 of the mounting bracket 5, and the standing wall portion 71 and the covering wall portion 72, together with the covering wall portion 52 of the mounting bracket 5, form the ridge-side retaining recess 130.

[0065] As shown in Figure 4, the eaves side end 25 of the solar cell module 2 is held in the eaves side holding recess 63 of the holding bracket 6A, and the ridge side end 26 is held by the ridge side holding recess 130 composed of the holding bracket 6B and the mounting bracket 5B.

[0066] As shown in FIGS. 4 and 5 , the mounting bracket 5B has the second buffer portion 54 interposed between the underside of the ridge side portion of the solar cell module 2 and the covering wall portion 52 .

[0067] 5 , the retaining fitting 6 has the locking wall portion 73 of the locking fitting 60 overlapping the end face side covering portion 91 of the fixing fitting 61 in the thickness direction (eaves-ridge direction Y). In the retaining fitting 6, the locking-side insertion hole 77 of the locking fitting 60 and the fixed-side fastening hole 92 of the fixing fitting 61 form a single communicating hole. The fixing fastening element 62 has its shank inserted into the communicating hole and fastens to the fixed-side fastening hole 92 of the fixing fitting 61.

[0068] In the retaining fitting 6, the distance between the locking wall portion 73 of the locking fitting 60 and the eaves-side end face of the solar cell module 2 is preferably 0.2 cm or more and 0.6 cm or less. As shown in Fig. 5, the retaining fitting 6 has an end face buffer portion 101 interposed between the locking wall portion 73 of the locking fitting 60 and the eaves-side end portion 25 of the solar cell module 2. The end face buffer portion 101 has a space between it and the end face cover portion 91 of the fixing fitting 61, and is elastically deformable toward the end face cover portion 91 of the fixing fitting 61. As shown in Fig. 5, the retaining fitting 6 has the locking wall portion 73 of the locking fitting 60 protruding upward from the light-receiving-side cover portion 90 of the fixing fitting 61, and the protruding portion forms a snow stop portion 131 with a snow-stopping function. That is, the snow stopping portion 131 is part of the locking wall portion 73 of the locking fitting 60 and is an overhanging portion from the light-receiving-side cover portion 90 of the fixing fitting 61, and is capable of stopping snow 201 and the like in areas with heavy snowfall, as shown in Figure 15. The length of the snow stopping portion 131 (the overhanging length of the locking wall portion 73 from the light-receiving-side cover portion 90) can be set as appropriate, and is preferably 1.3 cm or more. The holding fitting 6 restricts movement of the solar cell module 2 and fixing fitting 61 toward the eaves side, and the locking wall portion 73 supports the weight of the solar cell module 2 and fixing fitting 61.

[0069] Next, a preferred procedure for replacing a specific solar cell module 2 in the roof structure 1 of this embodiment will be described.

[0070] First, using an operating member not shown, the fixing fastening element 62 on the retaining bracket 6 that holds the eaves side of the solar cell module 2a to be replaced is rotated circumferentially to release the fastening between the fixing fastening element 62 and the fixing side fastening hole 92 (see Figure 9), and the fixing bracket 61 is removed from the locking bracket 60 as shown in Figure 13 (a).

[0071] At this time, the locking wall portion 73 faces the eaves side end portion 25 of the solar cell module 2a, restricting movement of the solar cell module 2a toward the eaves side, making it impossible for the solar cell module 2a to move toward the eaves side in the eaves-ridge direction Y.

[0072] Next, as shown in Figure 13 (b), the solar cell module 2a to be replaced is lifted and removed with the ridge side end 26 held by the ridge side holding recess 130 until the eaves side end 25 is higher than the locking wall portion 73.

[0073] Next, as shown in Figure 14 (a), the new solar cell module 2b is tilted and the ridge side end 26 is inserted into the ridge side holding recess 130, and the new solar cell module 2b is laid down and placed on the back side buffer portion 100 of the locking fitting 60.

[0074] At this time, with the ridge side end 26 of the new solar cell module 2b held in the ridge side holding recess 130, the new solar cell module 2b is placed so that the eaves side end 25 faces the end face side buffer portion 101 of the locking fitting 60.

[0075] Next, as shown in Figures 9 and 14(b), the fixing bracket 61 is placed across the light receiving surface 20 and the eaves side end 25 of the new solar cell module 2b, and the shaft portion of the fixing fastening element 62 is inserted into the locking side insertion hole 77 of the locking bracket 60, and the shaft portion of the fixing fastening element 62 is tightened into the fixing side fastening hole 92 using an operating member not shown to fix it.

[0076] According to the roof structure 1 of this embodiment, the fastening element 62 can be operated from the eaves side of the locking wall portion 73 of the locking fitting 60, and the shaft is inserted into the overlapping portion of the locking wall portion 73 of the locking fitting 60 and the end face side covering portion 91 of the fixing fitting 61 to fix the end face side covering portion 91 to the locking wall portion 73, and the locking wall portion 73 of the locking fitting 60 supports the weight of the solar cell module 2 and the fixing fitting 61. Therefore, by removing the fastening element 62, the fixing fitting 61 can be removed from the locking wall portion 73 of the locking fitting 60, and maintenance etc. can be easily performed on the solar cell module 2 with the solar cell module 2 laid on the roof underlayment 200. According to the roof structure 1 of this embodiment, the weight of the solar cell module 2 and the locking fitting 60 is supported by the locking wall portion 73, so even if the fixing fastening element 62 comes off, the solar cell module 2 and the locking fitting 60 can be locked by the locking wall portion 73, preventing the solar cell module 2 from falling. According to the roof structure 1 of this embodiment, the weight of the solar cell module 2 and the fixing fitting 61 is supported by the locking wall portion 73, so even if the fixing fitting 61 is removed, the solar cell module 2 is locked by the locking wall portion 73 and is unlikely to fall in an unloaded state, allowing maintenance and the like to be performed on the solar cell module 2 safely.

[0077] According to the roof structure 1 of this embodiment, the snow stop portion 131 of the locking wall portion 73 protrudes upward beyond the light-receiving-side cover portion 90 of the fixing bracket 61. Therefore, as shown in Figure 15, the locking wall portion 73 can function as a snow stop when used in areas with heavy snowfall.

[0078] According to the roof structure 1 of this embodiment, it is preferable that the length of the retaining wall portion 73 extending from the light-receiving-side cover portion 90 of the fixing bracket 61 (the length of the snow stopping portion 131) is 1.3 cm or more. This allows the snow stopping portion 131 to function as a snow stopper more effectively.

[0079] According to the roof structure 1 of this embodiment, the solar cell module 2 can be replaced non-destructively when the fixing metal fittings 61 are detached from the locking metal fittings 60. This makes maintenance and replacement of the solar cell module 2 easy.

[0080] According to the roof structure 1 of this embodiment, it is preferable that the distance between the locking wall portion 73 of the locking fitting 60 and the eaves-side end face of the solar cell module 2 is 0.20 cm or more. This makes it easier to lift and remove the solar cell module 2.

[0081] According to the roof structure 1 of this embodiment, the covering wall portion 72 of the locking fitting 60 that holds the eaves-side end portion 25 of the ridge-side solar cell module 2 is sandwiched between the ridge-side solar cell module 2 and the eaves-side solar cell module 2. Therefore, the weight of the ridge-side solar cell module 2 can prevent the eaves-side solar cell module 2 from moving upward.

[0082] According to the roof structure 1 of this embodiment, the ridge-side end 26 of the solar cell module 2 on the eaves side is sandwiched and held between the mounting bracket 5 attached to the roof underlayment 200 and the covering wall portion 72 of the locking bracket 60. This further prevents the solar cell module 2 on the eaves side from moving upward.

[0083] In the above-described embodiment, the locking wall portion 73 is made to protrude upward beyond the light-receiving-side cover portion 90 of the fixing bracket 61 to provide a snow guard function, but the present invention is not limited to this. As shown in Figure 16, the locking wall portion 73 does not have to protrude upward beyond the light-receiving-side cover portion 90 of the fixing bracket 61.

[0084] In the above-described embodiment, the locking wall portion 73 rises in a direction perpendicular to the eaves-ridge direction Y, but the present invention is not limited to this. The locking wall portion 73 may rise in a direction intersecting the eaves-ridge direction Y, and does not have to be perpendicular.

[0085] In the above-described embodiment, the mounting metal fitting 5 and the holding metal fitting 6 are separate members, but the present invention is not limited to this. The mounting metal fitting 5 and the holding metal fitting 6 may be configured as a single member.

[0086] In the above-described embodiments, each component can be freely substituted or added between the respective embodiments as long as it falls within the technical scope of the present invention.

[0087] DESCRIPTION OF SYMBOLS 1 Roof structure 2, 2B Solar cell module 2A Solar cell module (second solar cell module) 5, 5A, 5B Mounting bracket 6, 6A, 6B Holding bracket (eaves-side bracket) 25 Eaves-side end 26 Ridge-side end 60 Locking bracket 61 Fixing bracket 62 Fixing fastening element (temporary fastening element) 72 Covering wall portion (rear-side covering portion) 73 Locking wall portion (locking portion) 90 Light-receiving side covering portion 91 End surface side covering portion 200 Roof underlay

Claims

1. A roof structure having a solar cell module and an eaves-side fitting, wherein the eaves-side end of the solar cell module is held by the eaves-side fitting and the solar cell module is fixed to the roof underlayment, wherein the eaves-side fitting has a fixing fitting, a locking fitting, and a temporary fastening element, wherein the fixing fitting has a light-receiving side covering portion that covers the light-receiving surface of the solar cell module and an end face side covering portion that covers the eaves-side end face of the solar cell module, wherein the locking fitting has a back face side covering portion that covers the back side of the solar cell module and a locking portion that rises from the back face side covering portion in a direction intersecting the eaves-ridge direction, wherein the locking portion of the locking fitting overlaps with the end face side covering portion in the eaves-ridge direction, wherein the temporary fastening element can be operated from the eaves side of the locking portion, and wherein a shaft portion is inserted into the overlapping portion of the locking portion and the end face side covering portion to fix the end face side covering portion to the locking portion, and wherein the locking portion supports the weight of the solar cell module and the fixing fitting.

2. A roof structure as described in claim 1, wherein the engaging portion protrudes upward beyond the light-receiving side covering portion of the fixing metal fitting.

3. A roof structure as described in claim 2, wherein the length of the engagement portion extending from the light-receiving side cover portion of the fixing metal fitting is 1.3 cm or more.

4. A roof structure as described in any one of claims 1 to 3, wherein the solar cell module is replaceable non-destructively when the fixing bracket is removed from the locking bracket.

5. A roof structure as described in any one of claims 1 to 3, wherein the distance between the locking portion of the locking fitting and the eaves-side end face of the solar cell module is 0.20 cm or more.

6. A roof structure as described in any one of claims 1 to 3, further comprising a second solar cell module located on the eaves side of the solar cell module and partially covered by the solar cell module, and the rear surface covering portion of the fastening fitting is sandwiched between the second solar cell module and the solar cell module.

7. A roof structure as described in claim 6, further comprising a mounting bracket that is attached to the roof substrate, and the ridge side end of the second solar cell module is held by being sandwiched between the mounting bracket and the rear side covering portion of the locking bracket.

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