Method of installing solar cell module

The present invention relates to a method of installing a solar cell module.

In recent years, with the increasing momentum of environmental protection, technological development and introduction of energy systems utilizing natural energy have been actively carried out. As an example of such an energy system, a residential photovoltaic power generation system has attracted a great deal of attention. In a residential photovoltaic power generation system, power is generated by a plurality of solar cell modules arranged on the roof of the house. Then, in each solar cell module, for example, a plurality of solar cell elements that convert the light energy of sunlight into electric energy are electrically connected.

Such a residential photovoltaic power generation system is required to reduce the man-hours required for construction to install the solar cell module on the roof, and to perform various performances such as power generation capacity and durability after construction. .. Then, as the most basic requirement regarding the construction of the solar cell module, it is required to install the solar cell module while ensuring the waterproof property on the roof.

For example, when the solar cell module is attached to a pedestal arranged on a roof covered with a roofing material, the pedestal is fixed to a roof base material such as a field board and a roofing material. Here, for example, when the gantry is fixed to a portion where the rafters are not arranged, it is necessary to fix the gantry to the roof base material with sufficient strength by tightening with wood screws or the like. However, if the roof base material contains water due to the infiltration of rainwater or the like, the strength of the roof base material may decrease.

Therefore, for example, there is a technique in which a sealing material such as a caulking material is arranged in a through hole provided in the roof material by perforation, and the gantry is fixed to the roof base material by a wood screw through the through hole (for example). See Patent Document 1 etc.).

Also, for example, the solar panel is fixed by bolts screwed into the field board and the main building through the through holes of the roof tile, and between the through holes and the bolts and between the nuts screwed into the bolts and the upper surface of the roof tiles. There is a technique in which a waterproofing agent is filled between the two (see, for example, Patent Document 2 and the like). Further, when the bracket is fixed by bolts and nuts arranged in the mounting holes penetrating the roofing material and the roof base material, the waterproofing agent in the mounting holes is compressed by the upper and lower packing members to obtain waterproofness. (For example, see Patent Document 3 etc.). In this technique, the solar cell module is attached to the bracket.

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2002-188250</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 8-193392</text></patcit><patcit num="3"><text>Japanese Unexamined Patent Publication No. 8-312075</text></patcit></p>

<p> By the way, examples of the roofing material thatched on the roof of a house include slate-based, cement-based, clay-based and metal-based roofing materials. Then, mounting members for solar cell modules corresponding to such various roofing materials are on sale. In such a situation, in Japan, in the case where the solar cell module is installed on the roof of a house, there are many construction examples in which the solar cell module is installed on the roof covered with slate roofing material.</p><p> Here, when the gantry is fixed by the wood screw on the roof base material on which the roof material is laid and the solar cell module is installed on the pedestal, the space between the roof material and the wood screw and the roof base material and the wood screw It is necessary to reduce inundation due to capillarity and the like that may occur between the roofs. Therefore, for example, when a through hole is provided in the roof material by perforation and a wood screw is screwed into the roof base material through the through hole to fix the gantry to the roof base material, the through hole is waterproofed together with the wood screw. A construction method in which the material is injected can be adopted.</p><p> However, for example, when a through hole having a diameter of a certain diameter or more is provided in a slate roofing material by perforation, various debris such as perforation debris and burrs remaining on the peripheral edge on the lower end side of the through hole are generated. obtain. If the debris generated during such drilling is interposed between the waterproof material and the roof base material, water inundation due to the capillary phenomenon or the like occurs at the contact portion between the debris and the roof base material, resulting in rain leakage and the roof base material. Corrosion can occur. That is, the waterproofness of the roof may decrease. As for burrs, when the waterproof material is injected into the through hole, it may fall off from the roof material and be mixed into the waterproof material, which may lead to a decrease in the waterproof property of the roof.</p><p> On the other hand, in the techniques of Patent Documents 1 and 2, the waste generated when the roofing material is provided with the through hole is not sufficiently considered.</p><p> For example, in the technique of Patent Document 1, burrs and the like may be generated on the peripheral edge portion on the lower end side of the through hole provided in the roofing material by drilling, and the field board and roofing material arranged directly under the through hole are included. Perforation debris can be generated on the roofing material. In this case, if debris due to perforation is present at the interface between the sealant injected into the through hole and the roof base material, the adhesion between the sealant and the roof base material is reduced, and a capillary phenomenon or the like occurs. Can cause flooding of the roofing material.</p><p> Further, in the technique of Patent Document 2, a waterproof material is not arranged between the upper surface of the field board and the bolt. Therefore, if rainwater infiltrates through the gaps between the plurality of roofing materials, water may be contained in the field board and the purlin due to a capillary phenomenon between the bolt and the field board and the purlin, and the strength of the field board and the purlin may decrease.</p><p> Further, in the technique of Patent Document 3, the mounting hole also penetrates the roof base material, and the wood screw cannot be screwed into the roof base material. Therefore, complicated work of attaching the engaging member to the bolt from the attic side is required. Here, the work of installing the solar cell module on the roof is a work at a high place on the roof. Therefore, complicated work can induce a long construction time and construction mistakes.</p><p> Therefore, there is a demand for a method of installing a solar cell module that can ensure waterproofness on the roof by a relatively simple process when installing the solar cell module on the roof.</p>

<p> In order to solve the above problems, the method of installing the solar cell module according to one aspect includes the first step to the fourth step. In the first step, a through hole is formed in the roofing material thatched on the roofing material by using a tool. Further, in the second step, a jig having a rod-shaped main body portion and a protruding portion protruding in an intersecting direction intersecting the axial direction of the main body portion is inserted into the through hole, and the jig is inserted into the main body portion. By rotating around the above, the dust of the roofing material generated in the first step is removed from the region along the penetrating direction of the through hole from the through hole to the roof base material by using the protruding portion. To do. Further, in the third step, a process of pushing the waterproof material into the through hole, and a process of passing a screw through the mounting portion of the gantry arranged on the roof material and the through hole and screwing the screw into the roof base material. By performing the above, the gantry is fixed to the roof base material in a state where the waterproof material is arranged from the inside of the through hole to the portion where the screw of the roof base material is screwed. Further, in the fourth step, the solar cell module is attached to the gantry.</p>

<p> According to the method of installing the solar cell module according to one aspect, for example, the debris generated when the roofing material is provided with the through hole is removed from the area where the screw and the waterproofing material are arranged, so that the waterproofing material Dust is hard to adhere. As a result, the solar cell module can be installed on the roof while ensuring waterproofness on the roof by a relatively simple process.</p>

<figref num="1">It is a perspective view which shows typically one configuration example of the solar cell array which concerns on one Embodiment.</figref><figref num="2">It is a top view which shows typically one configuration example of a solar cell module.</figref><figref num="3">It is a figure which shows the XZ cross section at the position shown by the alternate long and short dash line III-III in FIG.</figref><figref num="4">It is a flow chart which illustrates the installation process of the solar cell module which concerns on one Embodiment.</figref><figref num="5">It is a perspective view which illustrates the jig for adjusting the drilling position of a roofing material.</figref><figref num="6">It is sectional drawing which illustrates how the roofing material is perforated.</figref><figref num="7">It is sectional drawing which illustrates the appearance that the through hole was provided in the roof material.</figref><figref num="8">It is sectional drawing which illustrates how the debris generated at the time of drilling a roofing material is removed by a blast.</figref><figref num="9">It is a figure which illustrates the jig for removing the debris generated at the time of drilling a roofing material.</figref><figref num="10">It is sectional drawing which illustrates how the dust is removed by a jig.</figref><figref num="11">It is an enlarged cross-sectional view which illustrates the state before the dust is removed by a jig.</figref><figref num="12">It is an enlarged cross-sectional view which illustrates how the dust is removed by a jig.</figref><figref num="13">It is an enlarged cross-sectional view which illustrates the state after the dust is removed by a jig.</figref><figref num="14">It is sectional drawing which illustrates the state that the gantry is fixed to the roof base material on the roof.</figref><figref num="15">It is sectional drawing which illustrates how the solar cell module is attached to the gantry.</figref>

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, parts having the same configuration and function are designated by the same reference numerals, and duplicate description will be omitted in the following description. In addition, the drawings are schematically shown, and the sizes and positional relationships of various structures in each drawing are not accurately illustrated. In addition, in FIGS. 1 to 3, FIGS. 6 to 8 and 10 to 15, the extending direction of the eaves located at the lower end of the roof 2 is the + X direction, and the highest part of the roof 2 from this eaves. A right-handed XYZ coordinate system is attached with the direction toward the building located in the + Y direction. Further, in FIGS. 5 and 9, a right-handed xyz coordinate system for explaining the structure of the jigs JG1 and JG2 is attached. When the jigs JG1 and JG2 are used, the + X direction and the + x direction are substantially the same, the + Y direction and the + y direction are substantially the same, and the + Z direction and the + z direction are the same. Can be approximately the same.

&lt;(1) One Embodiment&gt; &lt;(1-1) Configuration of Solar Cell Array&gt; As shown in FIG. 1, the solar cell array 1 is installed on the roof 2. The solar cell array 1 includes a gantry 3 fixed on the roof 2 and one or more (seven in this case) solar cell modules 10 attached to the gantry 3.

The roof 2 includes a roof base material 21 and a roof material 22 thatched on the roof base material 21. Here, the roofing material 22 may be, for example, a slate-based or cement-based flat plate containing a decorative slate, a natural slate, or the like. In the present embodiment, a plurality of roofing materials 22 are laid on the roof base material 21. Further, the roof base material 21 includes, for example, a field board 21a, a roofing material 21b that covers the upper surface of the field board 21a, and a rafter 21c that holds the field board 21a from below. The field board 21a and the rafters 21c may be made of wood, for example. The roofing material 21b may be, for example, a sheet-like material having waterproofness, breathability, and the like.

The gantry 3 is a member for installing the solar cell module 10 on the roof 2. The gantry 3 includes a plurality of (here, five) holding portions 31 and a plurality of mounting portions 32.

The holding portion 31 is a portion for holding the solar cell module 10. Each holding portion 31 is a rail-shaped portion extending in the + X direction. Each holding portion 31 has a groove portion extending in the + X direction. The solar cell module 10 is attached to the gantry 3 by fitting the solar cell module 10 into the groove. The mounting portion 32 is a portion fixed to the roof base material 21 by screws Sc1 (see FIGS. 14 and 15) and the like. Each mounting portion 32 is connected to, for example, the lower part of the holding portion 31, and has a structure extending in the ± Y direction. Here, if the mounting portions 32 are connected to two or more positions separated by a certain degree from each holding portion 31, each holding portion 31 can be stably fixed to the roof base material 21.

Here, for example, if the position in the + Y direction in which each holding portion 31 is connected to the mounting portion 32 can be adjusted, the distance between the adjacent holding portions 31 can be easily adjusted. Further, each mounting portion 32 may be provided with at least one of a through hole and a slit through which the screw Sc1 is passed. In the present embodiment, the screw Sc1 is screwed into the roof base material 21 so as to penetrate the mounting portion 32, the roofing material 21b and the field board 21a.

Then, as shown in FIG. 1, in the present embodiment, the plurality of holding portions 31 include five holding portions 31a to 31e arranged in order from the ridge side to the eaves side. Then, one solar cell module 10 is attached between the holding portion 31a and the holding portion 31b. Further, two solar cell modules 10 are attached between the holding portion 31b and the holding portion 31c. Further, two solar cell modules 10 are attached between the holding portion 31c and the holding portion 31d. Further, two solar cell modules 10 are attached between the holding portion 31d and the holding portion 31e. As a result, seven solar cell modules 10 are arranged.

&lt;(1-2) Solar cell module&gt; As shown in FIG. 2, the solar cell module 10 includes a plurality of solar cell elements 11. For example, the solar cell module 10 may include a plurality of solar cell elements 11 that are electrically connected in series by a wiring member 12. Such a solar cell module 10 is formed by connecting a plurality of solar cell elements 11 in series and in parallel, for example, when the electric output of a single solar cell element 11 is small. Then, for example, by combining a plurality of solar cell modules 10, a practical electric output can be taken out.

As shown in FIGS. 2 and 3, for example, in the solar cell module 10, a transparent member 13, a front side filler 14, a plurality of solar cell elements 11, a wiring member 12, a back side filler 15, and a back surface protective material 16 are laminated. It has a laminated body.

Here, the transparent member 13 is a member for protecting a surface (also referred to as a light receiving surface) of the solar cell module 10 that receives incident light. The transparent member 13 may be, for example, a transparent flat plate-shaped member. As the material of the transparent member 13, for example, glass or the like is adopted. The front side filler 14 and the back side filler 15 may be, for example, a transparent filler. As the material of the front side filler 14 and the back side filler 15, for example, ethylene-vinyl acetate copolymer (EVA) or the like is adopted. The back surface protective material 16 is a member for protecting the solar cell module 10 from the back surface. As the material of the back surface protective material 16, for example, polyethylene terephthalate (PET) or polyvinyl fluoride resin (PVF) is adopted.

Of the plurality of solar cell elements 11 electrically connected in series, one end of the electrode of the first solar cell element 11 and one end of the electrode of the last solar cell element 11 are provided by an output take-out wiring (not shown). Each is electrically connected to the terminal box 17. Further, the solar cell module 10 includes a frame body 18 that holds the laminated body from the surroundings. As the material of the frame body 18, for example, aluminum having corrosion resistance and strength is adopted.

&lt;(1-3) Installation of solar cell module&gt; Fig. 4 is a flow chart showing the process of installing the solar cell module 10 on the roof 2. In this step, the first step (step S1), the second step (step S2), the third step (step S3), and the fourth step (step S4) are performed in order. In the first step, through holes TH11 to TH14 (see FIG. 7) are formed in the roofing material 22. In the second step, the waste OF1 (see FIG. 7) generated in the first step is removed. In the third step, the gantry 3 is fixed to the roof base material 21. In the fourth step, the solar cell module 10 is attached to the gantry 3. Hereinafter, the first to fourth steps will be specifically described.

&lt;(1-3-1) First step&gt; In the first step, the tool TL1 is used to form through holes TH11 to TH14 in the roofing material 22 thatched on the roof base material 21. At this time, for example, the jig JG1 for defining the arrangement relationship of the through holes TH11 to TH14 is used. Further, the tool TL1 may be, for example, an electric drill for drilling.

As shown in FIG. 5, the jig JG1 is, for example, a plate-shaped member extending in the + y direction. Specifically, the jig JG1 includes a first plate portion B1, a second plate portion B2, a third plate portion B3, a first hanging portion ST1 and a second hanging portion ST2. The first plate portion B1 is a plate-shaped portion extending in the + y direction. The first hanging ST1 is a plate-shaped part that hangs in the -z direction from the end on the -y side of the first plate B1. The second hanging ST2 is a plate-shaped part that hangs in the -z direction from the + y-side end of the first plate B1. The second plate portion B2 is a plate-shaped portion extending in the -y direction from the end on the -Z side of the first hanging portion ST1. The second plate portion B2 is provided with through holes TH1 and TH2 penetrating in the -Z direction. The third plate portion B3 is a plate-shaped portion extending in the + y direction from the end on the -Z side of the second hanging portion ST2. The third plate portion B3 is provided with through holes TH3 and TH4 penetrating in the -Z direction. The four through holes TH1 to TH4 are provided so as to be aligned in a straight line in the + y direction, for example. The material of the jig JG1 may be a high-strength material having high rigidity such as special steel.

As shown in FIG. 6, the jig JG1 is placed on the roofing material 22 that is laid on the roofing material 21. At this time, the extending direction of the jig JG1 is the + Y direction from the eaves to the ridge. That is, the + X direction and the + x direction are substantially the same, the + Y direction and the + y direction are substantially the same, and the + Z direction and the + z direction are substantially the same. Then, the tip tool is rotated while penetrating the tip tool portion of the electric drill as the tool TL1 from the + Z side in the -Z direction through the through holes TH1 to TH4 of the jig JG1. At this time, as shown in FIGS. 6 and 7, through holes TH11 to TH14 penetrating in the direction from the upper surface to the back surface (also referred to as the penetration direction) of the roofing material 22 are formed in the roofing material 22. Here, the penetration direction substantially coincides with the -Z direction. Then, in the present embodiment, the through hole TH11 is provided directly under the through hole TH1, and the through hole TH12 is provided directly under the through hole TH2. Further, in the present embodiment, the through hole TH13 is provided directly under the through hole TH3, and the through hole TH14 is provided directly under the through hole TH4.

Waste OF1 is generated by the perforation in which the through holes TH11 to TH14 are formed in the roofing material 22 in this way. The waste OF1 includes perforated waste generated by finely crushing the roof material 22, and openings (also referred to as lower openings) on the roof base material 21 side of the through holes TH11 to TH14 of the roof material 22. It may contain burrs and the like generated around the roof.

&lt;(1-3-2) Second step&gt; In the second step, the waste OF1 generated in and around each of the through holes TH11 to TH14 is removed in the first step.

In the present embodiment, the powdery perforated waste of the waste OF1 is removed by blowing air with the blower BL1. For example, as shown in FIG. 8, the tip portion of the nozzle NZ1 of the blower BL1 is inserted into the through holes TH11 to TH14 in order, and air is injected from the tip portion of the nozzle NZ1 according to the operation of the blower BL1. At this time, by blowing air from the through holes TH11 to TH14, scraps are generated from the regions AR1 along the penetration direction of the through holes TH11 to TH14 from the through holes TH11 to TH14 to the roof base material 21 and from the periphery of the region AR1. Part of OF1 is removed. Some of the debris OF1 removed here includes, for example, powdery perforated debris. In addition, a part of the waste OF1 to be removed may include, for example, perforated waste having a certain size among the waste OF1.

In addition, burrs and relatively large perforated debris generated around the lower openings of the through holes TH11 to TH14 of the debris OF1 are removed by the jig JG2.

As shown in FIG. 9, the jig JG2 has, for example, an intersecting direction in which the rod-shaped main body BD2 intersects the extension direction (also referred to as the axial direction) of the axis of the main body BD2 at the tip of the main body BD2. It has a protruding part PP2 that protrudes from the jig. Here, the rod shape includes a general long and thin shape such as a long and thin tubular one. The axial direction of the main body BD2 substantially coincides with the longitudinal direction of the main body BD2. In the present embodiment, the axis of the main body BD2 passes substantially the center of the main body BD2 along the longitudinal direction (here, the -z direction) of the main body BD2. The intersecting directions intersecting the axial direction of the main body BD2 may be, for example, the ± x direction and the ± y direction. The crossing direction may be different from the ± x direction and the ± y direction.

Further, for example, the main body portion BD2 is relatively thick and relatively thin provided at the rod-shaped first rod-shaped portion BR1 extending in the -z direction and the end portion of the first rod-shaped portion BR1 on the -z side. It also has a rod-shaped second rod-shaped portion BR2 extending in the -z direction. The first rod-shaped portion BR1 is held by, for example, an operator. A protrusion PP2 is provided at the tip of the second rod-shaped portion BR2 on the -z side. Here, the second rod-shaped portion BR2 and the protruding portion PP2 need only have a size that allows the second rod-shaped portion BR2 and the protruding portion PP2 to be inserted into the through holes TH11 to TH14. The material of the jig JG2 may be any material having sufficient hardness and rigidity such as special steel and stainless steel.

In FIG. 9, the intersecting direction in which the protruding portion PP2 protrudes from the tip portion of the second rod-shaped portion BR2 is the ± y direction, and the second rod-shaped portion BR2 and the protruding portion PP2 have a T-shaped structure. Is shown, but is not limited to this. For example, the crossing direction in which the protruding portion PP2 protrudes from the tip portion of the second rod-shaped portion BR2 is the + y direction, the -y direction, or the like, and the second rod-shaped portion BR2 and the protruding portion PP2 have an L-shaped structure. The form used may be adopted. That is, the intersecting direction in which the protruding portion PP2 protrudes from the tip portion of the second rod-shaped portion BR2 may be one or more. Further, the crossing direction in which the protruding portion PP2 protrudes from the tip portion of the second rod-shaped portion BR2 does not have to be orthogonal to the extending direction of the second rod-shaped portion BR2.

Then, as shown in FIGS. 10 to 13, the jig JG2 is inserted into the through holes TH11 to TH14 from above (here, on the + Z side). At this time, the axial direction of the main body BD2 of the jig JG2 substantially coincides with the through direction of each of the through holes TH11 to TH14. That is, the + X direction and the + x direction are substantially the same, the + Y direction and the + y direction are substantially the same, and the + Z direction and the + z direction are substantially the same. Then, the jig JG2 is rotated around the main body BD2. Specifically, the main body BD2 is rotated about an axis along the axial direction of the main body BD2. The rotation of the jig JG2 may be automatically performed by electric power or the like, or may be manually performed by an operator. At this time, the projecting portion PP2 uses the region AR1 along the penetrating direction of the through holes TH11 to TH14 from the through holes TH11 to TH14 to the roof base material 21, and the waste OF1 of the roofing material 22 from the periphery of the region AR1. And removed.

11 to 13 are enlarged views of the region EA1 surrounded by the broken line circle in FIG. 10. For example, as shown in FIGS. 11-12, the jig JG2 is placed in the through hole TH13. Next, the jig JG2 is rotated around the axial direction of the main body BD2. At this time, as shown in FIG. 12, the rotation of the protrusion PP2 can remove the burrs generated around the lower opening of the through hole TH13. Further, the protruding portion PP2 is rotated while being in contact with the roof base material 21. As a result, as shown in FIG. 13, the waste OF1 existing on the roof base material 21 is swept out from the region AR1 below the through hole TH13 and the surrounding region. Such processing is performed on each through hole TH11 to TH14. As a result, when each of the through holes TH11 to TH14 is viewed in a plane from the + Z side, the waste OF1 can be efficiently removed from each of the through holes TH11 to TH14 and the region from the periphery to the outside.

The protruding portion PP2 of the jig JG2 may be, for example, a plurality of thin elastic members. Specifically, the jig JG2 may have a form such as a gold brush. In this case, even if the diameter of the tip portion of the jig JG2 where the elastic member is provided is larger than the through holes TH11 to TH14, the tip portion of the jig JG2 penetrates each through due to the elastic deformation of the elastic member. Can be placed in holes TH11-TH14. If such a form is adopted, a plurality of elastic members are put into the through holes TH11 to TH14 in a state of being elastically deformed, and the jig JG2 is rotated by the elastic force of the plurality of elastic members. Waste OF1 can be repelled. Therefore, the waste OF1 can be removed more efficiently. Further, for example, the jig JG2 has a structure in which the protruding portion PP2 does not protrude in the crossing direction when the jig JG2 is not rotated, and the protruding portion PP2 protrudes in the crossing direction due to centrifugal force when the jig JG2 is rotated. You may do it. That is, the jig JG2 may have a protruding portion PP2 protruding in the intersecting direction in a state of being rotated in each of the through holes TH11 to TH14.

&lt;(1-3-3) Third step&gt; In the third step, the gantry 3 is fixed to the roof base material 21 by the screws Sc1. Specifically, the waterproof material WA1 is pushed into each through hole TH11 to TH14, and the screw Sc1 is passed through each mounting portion 32 and each through hole TH11 to TH14 of the gantry 3 arranged on the roof material 22. , The process of screwing the screw Sc1 into the roof base material 21 is performed. At this time, with the waterproof material WA1 arranged from the inside of each through hole TH11 to TH14 to the portion of the roof base material 21 to which the screw Sc1 is screwed, each mounting portion 32 of the gantry 3 is attached to the roof base material 21. It is fixed. Here, each holding portion 31 can be fixed to the roof base material 21 by being attached to, for example, the mounting portion 32 fixed to the roof base material 21. At this time, for example, by adjusting the positions of the holding portions 31 attached to the mounting portions 32 in the + Y direction, the distance between the adjacent holding portions 31 may be appropriately set. Even if each holding portion 31 is fixed to the roof base material 21 by fixing the mounting portion 32 to the roof base material 21 in a state where the mounting portion 32 is integrally connected to each holding portion 31. good.

Here, the screw Sc1 does not require a female screw and may have a thread up to a sharp tip. As the screw Sc1, for example, an iron-based wood screw or the like can be adopted. A wood screw is a nail for wood in which a screw thread is spirally engraved on the body portion, and is screwed into the wood with a screwdriver or the like. The waterproof material WA1 may be, for example, a butyl rubber-based sealing material containing butyl rubber (IIR) as a main component. Butyl rubber is a copolymer of isobutylene and isoprene.

For example, as shown in FIG. 14, with the waterproof material WA1 attached to the outer peripheral portion of the body of the screw Sc1 in a cylindrical shape, the screw Sc1 is on the opposite side of the roof base material 21 of the through holes TH11 to TH14. It is passed through the through holes TH11 to TH14 from the opening OP1 (here, on the + Z side). As a result, the waterproof material WA1 is pushed into the through holes TH11 to TH14. Then, as shown in FIG. 14, when the screw Sc1 is screwed into the roof base material 21, the waterproof material WA1 attached to the outer peripheral portion of the body of the screw Sc1 spreads on the roof base material 21. Adheres to material 21. That is, the waterproof material WA1 is filled in each of the through holes TH11 to TH14, and the boundary portion between the screw Sc1 and the vicinity of the surface of the roof base material 21 is covered with the waterproof material WA1.

At this time, since the waste OF1 is removed from the region AR1 and its surroundings in the second step, the contact portion between the waste OF1 and the waterproof material WA1 is unlikely to occur, and the problem of water ingress due to the capillary phenomenon or the like is unlikely to occur. .. Further, by removing the burrs, when the waterproof material WA1 is pushed into the through holes TH11 to TH14, it is unlikely that the burrs will fall off from the roof material 22 and be mixed into the waterproof material WA1. Therefore, waterproofness is ensured in each of the through holes TH11 to TH14. As a result, waterproofness on the roof 2 can be ensured. The farther the waste OF1 is from the area AR1, the more difficult it is for the waterproof material WA1 and the waste OF1 to come into contact with each other. Therefore, the waterproofness of the roof 2 can be ensured more reliably.

Here, for example, when the screw Sc1 is screwed into the roof base material 21, the gantry 3 is fixed to the roof base material 21, and then the screw Sc1 is removed from the roof base material 21, the roofing material 21b is covered with the waterproof material WA1. It was confirmed that the roof was well adhered. Also, in an experiment in which a large amount of water was poured onto the solar cell array 1, no water leakage was confirmed in the vicinity of the interface between the screw Sc1 and the roof base material 21.

Further, for example, the length L1 in which the waterproof material WA1 is attached to the outer peripheral portion of the body of the screw Sc1 before the screw Sc1 is passed through the through holes TH11 to TH14 is the opening OP1 of each through hole TH11 to TH14. The distance from to the roof base material 21 is set longer than L2. The length L1 may be any length along the longitudinal direction of the screw Sc1. By adopting such a configuration, when the screw Sc1 is screwed into the roof base material 21, the waterproof material WA1 can spread in the space between the roof material 22 and the roof base material 21. As a result, the waterproof property of the roof 2 can be ensured more reliably.

Here, the outer diameter of the waterproof material WA1 attached to the outer peripheral portion of the body of the screw Sc1 may be substantially the same as the hole diameters of the through holes TH11 to TH14, for example. As a specific example, the hole diameter of each through hole TH11 to TH14 is about 9 mm, the hole diameter of the through hole (also called the mounting hole) of the mounting portion 32 is 8.5 mm, and the outer diameter of the threaded portion of the screw Sc1 is 6.1 mm. It is assumed that an adhesive layer with a thickness of 1.3 mm is wound around the outer periphery of the threaded portion. The adhesive layer has, for example, a layer of the waterproof material WA1 and an ethylene propylene diene rubber (EPDM) layer arranged around the layer of the waterproof material WA1. The EPDM layer is thin and non-adhesive, and serves to prevent the screws Sc1 from adhering to each other before they are passed through the through holes TH11 to TH14. In this case, when the screw Sc1 is passed through the mounting holes of the mounting portion 32 and the through holes TH11 to TH14 of the roofing material 22, first, the EPDM layer as the outermost layer of the adhesive layer wound around the outer peripheral portion of the screw Sc1. Is caught in the mounting hole and the EPDM layer is peeled off from the layer of the waterproof material WA1. At this time, the waterproof material WA1 wound around the outer peripheral portion of the screw Sc1 is exposed. Then, the screw Sc1 is passed through the through holes TH11 to TH14 together with the waterproof material WA1.

&lt;(1-3-4) Fourth step&gt; In the fourth step, the solar cell module 10 is attached to a plurality of holding portions 31 constituting the gantry 3. For example, as shown in FIG. 15, the solar cell module 10 can be attached to the gantry 3 by inserting the end portion of the solar cell module 10 into the groove of each holding portion 31.

&lt;(1-4) Summary of one embodiment&gt; As described above, according to the installation method of the solar cell module 10 according to one embodiment, for example, the waste OF1 generated at the time of forming the through holes TH11 to TH14 is It is removed by the jig JG2 from the area AR1 where the screw Sc1 and the waterproof material WA1 are arranged and its surroundings. Therefore, it is difficult for waste OF1 to adhere to the waterproof material WA1. As a result, the solar cell module 10 can be installed on the roof 2 while ensuring waterproofness on the roof 2 by a relatively simple process.

In addition, if relatively small perforated debris among the debris OF1 is removed by blowing air from the through holes TH11 to TH14 by a blower BL1 or the like, inundation due to the capillary phenomenon that may occur at the interface between the waterproof material WA1 and the debris OF1 will occur. It can be further suppressed. That is, the waterproof property of the roof 2 can be further ensured.

&lt;(2) Modifications&gt; The present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the gist of the present invention.

For example, in the second step of the above-described embodiment, a part of the waste OF1 is removed from the region AR1 and the periphery of the region AR1 by blowing air, but the present invention is not limited to this. For example, it is not necessary to remove a part of the waste OF1 from the region AR1 and the periphery of the region AR1 by blowing air. However, if a part of the waste OF1 is removed from the area AR1 and the periphery of the area AR1 by blowing air, the waste OF1 is more reliably removed from the area AR1 and the periphery of the area AR1, so that the roof 2 is waterproof. Can be secured.

Further, in the second step of the above-described embodiment, a process of removing a part of the waste OF1 from the region AR1 and the periphery of the region AR1 by blowing air, and a process of removing the waste OF1 from the region AR1 and the periphery of the region AR1 by the jig JG2. Was removed in this order. However, it is not limited to this. For example, after the jig JG2 removes the waste OF1 from the region AR1 and the periphery of the region AR1, a part of the waste OF1 may be removed from the region AR1 and the periphery of the region AR1 by blowing air. In this case, for example, the jig JG2 removes relatively large burrs and perforated debris from the waste OF1, and then the air blows removes relatively small perforated debris and powdered perforated debris from the waste OF1. obtain. Further, for example, the removal of the waste OF1 from the region AR1 and the periphery of the region AR1 by the jig JG2 and the removal of a part of the waste OF1 from the region AR1 and the periphery of the region AR1 by blowing air are performed at the same time. You may. In this case, a jig having both the functions of the blower BL1 and the jig JG2 may be adopted.

Further, in the above-described embodiment, burrs are generated around the lower openings of the through holes TH11 to TH14, but the present invention is not limited to this. For example, depending on the material of the roofing material 22 and the conditions for drilling, burrs may not easily occur. In this case, the burrs may not be removed by the jig JG2, and at least the waste OF1 may be removed by using the protrusion PP2 from the region AR1 along the penetration direction from the through holes TH11 to TH14 to the roof base material 21.

Further, in the second step of the above-described embodiment, the jig JG2 removes the waste OF1 from the region AR1 and the periphery of the region AR1, but the present invention is not limited to this. For example, the jig JG2 may remove burrs from the waste OF1 from the periphery of the region AR1, and the blower may remove the waste OF1 from the region AR1. In this case, the waste OF1 is removed from the periphery of the region AR1 along the penetration direction from at least the through holes TH11 to TH14 to the roof base material 21 by using the protruding portion PP2. That is, the waste OF1 may be removed from at least one of the region AR1 along the penetration direction from the through holes TH11 to TH14 to the roof base material 21 and the periphery of the region AR1 by using the protrusion PP2. .. The region AR1 corresponds to a region located substantially directly below the through holes TH11 to TH14 and between the roof base material 21.

Further, in the second step of the above-described embodiment, a part of the waste OF1 is removed from the region AR1 and the periphery of the region AR1 by blowing air, but the present invention is not limited to this. For example, a part of the waste OF1 may be removed from the region AR1 by blowing air. Further, for example, the jig JG2 may remove the waste OF1 from the region AR1, and the blower may remove a part of the waste OF1 from the periphery of the region AR1. That is, a part of the waste OF1 is sent from the through holes TH11 to TH14 from the region AR1 along the penetration direction from the through holes TH11 to TH14 to the roof base material 21 and at least one of the periphery of the region AR1. It should be removed. However, it is more difficult for the waste OF1 to adhere to the waterproof material WA1 when a part of the waste OF1 is removed from the region AR1 and the periphery of the region AR1 by blowing air. As a result, the solar cell module 10 can be installed on the roof 2 while the waterproofness of the roof 2 is more ensured by a relatively simple process.

Further, in the second step of the above-described embodiment, a part of the waste OF1 is removed from the region AR1 and the periphery of the region AR1 by blowing air, but the present invention is not limited to this. For example, a suction device may remove a portion of the debris OF1 from the region AR1 and the periphery of the region AR1.

Further, in the third step of the above-described embodiment, the screw Sc1 is passed through the through holes TH11 to TH14 with the waterproof material WA1 attached to the outer peripheral portion of the body of the screw Sc1, but the present invention is not limited to this. .. For example, after the waterproof material WA1 is injected into the through holes TH11 to TH14, the screw Sc1 may be passed through the through holes TH11 to TH14 and the screw Sc1 may be screwed into the roof base material 21. Further, for example, the waterproof material WA1 may be injected into the through holes TH11 to TH14 with the screw Sc1 screwed into the roof base material 21 to some extent, and then the screw Sc1 may be further screwed into the roof base material 21.

Needless to say, all or a part of the above-described embodiment and various modifications can be combined as appropriate within a consistent range.

1 Solar cell array 2 Roof 3 Stand 10 Solar cell module 21 Roof base material 22 Roof material 31 Holding part 32 Mounting part AR1, EA1 area BD2 Main body BL1 Blower JG1, JG2 Jig L1, L2 Distance OF1 Waste OP1 Opening PP2 Projection Part TH1 ~ TH4, TH11 ~ TH14 Through hole TL1 Tool WA1 Waterproof material