Solar cell module installation stand and roof waterproofing construction method

Abstract

To provide a solar cell module installation trestle, a floor waterproof structure, and a floor waterproof construction method which are lightweight as a solar cell module installation trestle, have good workability, do not apply a load to a live load of a building, do not use a weight such as a metal frame, a stone material, a concrete block or a metal block, facilitate landing and treatment, have an extremely small live load on a roof due to remarkable weight reduction, prevent intrusion of wind and rainwater into the inside of the trestle, prevent generation of lift force due to a negative pressure by wind, achieve both a waterproof function and installation of a building roof floor, enable installation of a solar cell module installation trestle without hindering the waterproof performance in addition to waterproof construction, and enable construction as waterproof construction of the building roof floor including the installation of the solar cell module installation trestle.SOLUTION: A frame panel made of foam plastic is assembled by fitting, and an outer surface of a solar cell module installation trestle 1 formed by sticking a face plate made of a foam plastic thereto is covered with an urethane coating film waterproof material 13.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a lightweight solar cell module installation base that can be installed on a building rooftop. and a roof waterproofing construction method for installing the solar cell module installation base thereon.

Background Art

[0002] As a method of fixing a mount to a flat roof of a concrete structure for installing a solar cell module, a method of drilling holes in the main body concrete or the pressing concrete and embedding an expansion type anchor bolt or an adhesive type anchor bolt in the holes has been proposed in the following patent documents not to drill holes in the main body concrete or the pressing concrete of the flat roof because it may cause deterioration of the main body and occurrence of rain leakage.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

[0004] Patent Document 1 proposes that, without using anchor bolts for a solar cell module installation mount on main body concrete or pressing concrete, a formwork is installed on a steel mount leg, a viscoelastic polyurethane resin is placed in the formwork, the mount leg is embedded in the viscoelastic polyurethane resin, and the steel mount leg and the main body concrete or the pressing concrete are adhered and integrated by the viscoelastic polyurethane resin.

[0005] Patent Document 2 describes a solar power generation device that takes into account the influence of wind on the building rooftop. It installs an upper side frame and a bottom side frame, which are integrally formed with facing materials such as aluminum, SUS metal, ceramics, and synthetic resin. The rising surfaces inclined at the grounding angle of the solar cell modules are formed on the bottom surface and both sides. The solar cell modules are fixed to the supporting parts of the upper side frame and the bottom side frame.

[0006] The integrally formed upper side frame and bottom side frame have a groove shape at the supporting parts on the bottom surface and the rising surface parts on both sides. Weights such as metal blocks like concrete blocks or iron are installed on the bottom surface. After fixing the upper side frame, the bottom side frame, and the solar cell modules, L-shaped air inflow prevention members are installed on the rising surface parts on both sides and the outside of the upper side frame to function as wind guide plates, taking measures against being blown away by the negative pressure (lifting force) caused by strong winds such as typhoons that push up the solar cell modules from below.

[0007] Patent Document 3 proposes a frame with a maximum height of 300 mm to reduce wind resistance and avoid generating lifting force. A plurality of frames made of aluminum hollow square bars or the like are fixed parallel from the upper part to the lower part on the building rooftop surface with an adhesive or the like, and weights made of stone or concrete block materials are installed. Further, after installing upper end columns, intermediate columns, and base fittings at predetermined positions on the installed plurality of frames, inclined fittings are installed on the upper end columns, intermediate columns, and base fittings. Horizontal support fittings are installed and assembled on the frames assembled in parallel in the north-south direction. Solar cell modules are installed on the horizontal support fittings.

[0008] To prevent the wind on the building rooftop from blowing into the area below the solar cell modules, an upper inclined cover and a lower inclined cover with a cross-sectional inclined Z shape, and side covers and corner covers with a cross-sectional inclined L shape on the left and right are installed at an inclined angle of 135° for the inclined surfaces with respect to the upper and lower surfaces, covering the periphery of the frame to avoid the blowing-in of wind.

[0009] Patent Document 4 aims to provide a mounting system for solar cell modules that is lightweight, can rationalize the installation work, and can be installed extremely stably against strong winds while being lightweight.

[0010] One or more solar cell modules with an inclined light-receiving surface are installed on a mount placed on an installation surface by combining frames, and a cover body is formed to cover the gap opened from around the inclined solar cell module to the installation surface, and the cover body is mounted so as to incline outward from around the solar cell module. The mount includes a base frame arranged parallel to the horizontal installation surface, a connecting frame that connects each base frame and supports the solar cell module, and a support frame provided behind the base frame and supporting the rear end of the solar cell module. The cover body includes a side cover that inclines outward from the side surface of the solar cell module and extends toward the horizontal installation surface, and a rear cover that inclines outward from the rear surface of the solar cell module and extends toward the horizontal installation surface, and is configured such that the solar cell module is pressed against the installation surface by the wind pressure blown onto the solar cell module.

Summary of the Invention

Problems to be Solved by the Invention

[0011] Patent Document 1 only replaces the fixing method to the building body concrete and the pressing concrete from anchor bolts to adhesion with polyurethane resin. Since the frame of the mount is made of conventional metal, it is heavy, and a heavy machine such as a wrecker is required for unloading.

[0012] In addition, in Patent Document 1, since it is not considered that the solar cell module is installed inclined and the blowing-in of wind under the solar cell module is prevented, in the case of a downwind, a positive pressure that presses the solar cell module acts, and in the case of an upwind, a negative pressure (lift force) that pushes up the solar cell module from below acts. This lift force acts as a force that peels the adhesion surface between the viscoelastic polyurethane resin and the body concrete or the holding concrete. Therefore, rainwater impregnates the body concrete or the holding concrete over a long period of time and freezes due to the temperature drop in winter, etc., resulting in a decrease in the surface strength of the concrete and a gradual decrease in the adhesion strength with the polyurethane resin. When the adhesion strength decreases and the solar cell module receives strong wind (negative pressure (lift force)) such as a typhoon, the adhesion surface may peel off and the module may be blown away and damaged.

[0013] In Patent Document 2, at the bottom pedestal side of the air inflow prevention member having an L-shape on the side surface, and at the upper side pedestal corner where the air inflow prevention member having an L-shape on the side surface and the air inflow prevention member having an L-shape outside the upper side pedestal are in contact at a right angle, wind blows in from the gap between the L-shapes, so fixing with a weight becomes important.

[0014] Both Patent Document 2 and Patent Document 3 take measures to reduce wind resistance and prevent lift force generation to achieve weight reduction. However, the members used are metal frames, and since weights such as stones, concrete blocks, or metal blocks are used, the weight of the members used is heavy, and a heavy machine such as a wrecker is required for unloading, and the loading weight on the building also becomes heavy.

[0015] Furthermore, the pedestals for solar cell modules in Patent Document 1, Patent Document 2, and Patent Document 3 all have a structure in which rainwater penetrates inside the pedestal. When performing waterproof layer repair work after installing these solar cell modules, it is necessary to cover the pedestal as a facility with a new waterproof layer, or to jack up the pedestal for the solar cell module and float it from the rooftop to perform waterproof work. Therefore, the work becomes complicated and large-scale, and the construction cost also increases significantly.

[0016] In Patent Document 4 as well, the cover body is formed of a metal material such as a highly corrosion-resistant plated steel sheet, a galvanized steel sheet, iron, aluminum, stainless steel, or a synthetic resin material such as a reinforced plastic, and is a member that covers the gap from the side surface of the solar cell module installed on the pedestal to the installation surface. However, since rainwater can penetrate, the waterproof structure is not considered, and ensuring waterproofness with the floor is not described either.

[0017] The product life of the solar cell module is assumed to be about 25 to 30 years. On the other hand, the standard service life of the waterproof layer on the building roof is 20 years for asphalt protective waterproofing and modified asphalt protective waterproofing, and 15 years for asphalt exposed waterproofing, modified asphalt exposed waterproofing, synthetic polymer sheet waterproofing, urethane rubber coating waterproofing, and FRP coating waterproofing. This was reported jointly by the Material Construction Committee of the Architectural Institute of Japan and the Waterproof Layer Deterioration Diagnosis WG in 2010.

[0018] Therefore, even when a solar cell module is installed on a roof constructed with asphalt protective waterproofing and modified asphalt protective waterproofing at the time of new construction, the waterproof layer will reach its service life before the installed solar cell module and pedestal reach their service lives, and it will be necessary to repair the waterproof layer while the solar cell module and pedestal are installed.

[0019] In addition, when a solar cell module and pedestal are installed on the roof of an existing building where the service life of the waterproof layer has passed to some extent, it will be necessary to repair the waterproof layer even earlier.

[0020] An object of the present invention is to solve the disadvantages of the above-mentioned conventional examples. As a mounting stand for a solar cell module, it is lightweight, has good workability, and does not impose a burden on the building's load-bearing capacity. It does not use any weights such as metal frames, stone, concrete blocks, or metal blocks. It is easy to unload and handle, and due to a significant weight reduction, the load on the roof is extremely small. Moreover, neither wind nor rainwater can penetrate inside the stand, and no lifting force is generated due to negative pressure caused by the wind. It is compatible with the waterproof function on the roof of a building, and a solar cell module mounting stand can be installed without hindering its waterproof performance in combination with waterproof construction. Construction is possible for waterproof construction on the roof of a building including the installation of the solar cell module mounting stand. Solar Cell Module Installation Stand and Roof Waterproofing Construction Method is to provide.

Means for Solving the Problems

[0021] To achieve the above object, the present invention according to claim 1 is a mounting stand for a solar cell module, which is assembled by fitting together foam plastic frame panels, On the outer periphery of this assembly, there is a foamed plastic panel composed of an inclined solar cell module installation surface panel, a rear panel inclined in the opposite direction thereto, a front panel installed on the opposite side thereof, and a substantially triangular side panel. and pasted. The gist is that the outer surface of the stand is coated with a urethane film waterproof material.

[0022] According to the present invention described in claim 1, the stand consists of a frame and a face plate. The frame is assembled by fitting together wall structure panels. Different from those made of frames, etc., it can be easily assembled and is also robust. Moreover, both the frame and the face plate of the wall structure are made of foam plastic, lightweight and having the required strength.

[0023] Furthermore, since the outer surface of the stand is coated with a urethane film waterproof material, it has excellent waterproof performance. In this way, the stand does not use any weights such as metal frames, stone, concrete blocks, or metal blocks, is easy to unload and handle, and due to a significant weight reduction, the load on the roof is extremely small.

[0024] In addition, the shape of the pedestal is such that the wind pressure blowing on the installation surface of the solar cell module is converted into an efficient force for pressing it. As a result, it is possible to install it with extremely high stability against strong winds while being lightweight, eliminating the need to use heavy weights (such as anchor bolts and blocks) as in the prior art. Moreover, since lightweight members are assembled and used, the installation work can be rationalized.

[0025] Furthermore, the pedestal has a structure in which the configuration of the pedestal is extremely simplified. Therefore, transportation and assembly work are facilitated, and the solar cell module can be easily installed even on the rooftop of a high-rise building. Moreover, since extremely lightweight installation is possible, it can be installed on existing buildings that were not originally planned to install solar cell modules without worrying about load-bearing capacity.

[0026] The invention according to claim 2 is characterized in that the joints of the solar cell module installation surface panel, the rear panel, the front panel, and the side panels, which are made of foamed plastic panels, are treated with adhesive tape or resin-based putty material, and a urethane coating waterproof material is applied thereon.

[0027] According to the invention of claim 2, although the urethane coating waterproof material is applied to cover the outer surface of the pedestal, the waterproof property can be further enhanced by treating the joints of the front panel and the side panels with adhesive tape or resin-based putty material.

[0028] The invention according to claim 3 is characterized in that the foamed plastic panel has a compressive strength of 10 N / cm 2 or more, a flexural strength of 15 N / cm 2 or more (JIS A 9521), a thickness of 10 mm or more, an oxygen index of 26% or more (JIS K 7201) not subject to the application of designated combustibles under the Fire Protection Law, and the foamed plastic panel has an adhesive force that causes cohesive failure with respect to the urethane coating waterproof material.

[0029] According to the present invention described in claim 3, a plurality of foamed plastic panels having specific compressive strength, flexural strength, thickness, and oxygen index are specified as an example.

[0030] According to the present invention described in claim 4, a framework panel made of foamed plastic is assembled by fitting, On the outer periphery of this assembly, there is a foamed plastic panel composed of an inclined solar cell module installation surface panel, a rear panel inclined in the opposite direction thereto, a front panel installed on the opposite side thereof, and a substantially triangular side panel. The installed gantry is installed on a pitched roof, and a urethane film waterproof material is applied to the entire pitched roof including the gantry. As a roof waterproof construction method for a solar cell module installation gantry, a framework panel made of foamed plastic is assembled by fitting and a foamed plastic face panel is attached thereto, and the installed gantry is installed on a pitched roof, and a urethane film waterproof material is applied to the entire pitched roof including the gantry.

[0031] According to the present invention described in claim 4, the entire pitched roof including the solar cell module installation gantry is seamlessly covered with a urethane film waterproof layer, providing a lightweight solar cell module installation gantry and a urethane waterproof layer that can prevent water leakage accidents and do not impose a burden on the roof loading capacity.

Advantages of the Invention

[0032] As described above, the Solar Cell Module Installation Stand and Roof Waterproofing Construction Method of the present invention is lightweight and has good workability as a solar cell module installation gantry, does not impose a burden on the building's loading capacity, does not use any heavy weights such as metal frames, stone, concrete blocks, or metal blocks, is easy to unload and handle, has an extremely small roof loading capacity due to significant weight reduction, does not allow wind or rain to penetrate inside the gantry, does not generate lift force due to negative pressure caused by wind, coordinates with the waterproof function of the building roof, etc., and can install a solar cell module installation gantry without inhibiting its waterproof performance in combination with waterproof construction, and the construction is possible as a waterproof construction for the building roof including the installation of the solar cell module installation gantry.

[0033] According to the present invention, since wind and rain do not blow into the solar cell module gantry installed on the building roof, no lift force is generated and there is no water leakage, and it is possible to install solar cell modules on the roofs of high-rise buildings of six stories or more.

[0034] Since no lift force is generated, regardless of the presence or absence of adhesive or double-sided tape at the center of the pedestal and mesh reinforcement at the corners around the pedestal, the adhesion force with the primer for the roof base layer made of urethane waterproof material, the ventilation buffer sheet, etc. is sufficient, and the entire roof is covered with an exposed urethane waterproof layer, making it easy to detect damage and perform maintenance.

[0035] Since the installation of the solar cell module pedestal and the construction of the waterproof layer can both be completed only by waterproof work, the construction responsibility becomes clear.

Brief Explanation of Drawings

[0036]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the following specific embodiments and can be arbitrarily modified within the scope of the technical idea.

[0038] The solar cell module installation stand 1 of the present invention is composed of a frame made of foamed plastic and a front panel, and the whole resembles the shape of a gable roof or a hip roof of a house. First, starting from the frame structure, as shown in FIG. 1, it includes a wall panel 2 having an upper edge 2a corresponding to a sagging part, and beam panels 3 and 4 (see FIGS. 3 and 4) having upper edges 3a and 4a corresponding to a ridge beam or a main roof (attic).

[0039] The wall panel 2 is in the shape of a scalene triangle, and forms a rectangular notch 2b at the top where the beam panel 3 fits, a groove-shaped notch 2c in the middle of the hypotenuse where the beam panel 4 fits, and further forms a notch 2d at the tip corner of the longer hypotenuse where a beam panel 5 corresponding to a fascia beam fits.

[0040] The beam panel 3 is a horizontally long rectangular panel as a whole, and is provided with a downward-opening notch 3b for fitting into the wall panel 2. Also, although the beam panels 4 and 5 are not shown in the figure, they are provided with downward-opening notches for fitting into the wall panel 2.

[0041] As shown in FIG. 2, a plurality of wall panels 2 are arranged with a gap therebetween, and the wall panels 2 and the beam panels 3, 4, and 5 are assembled into a grid. The strength of the beam panel 3 is increased by stacking a plurality of sheets (four sheets in the figure).

[0042] The foam plastic surface panel includes an inclined solar cell module installation surface panel 6 as a solar cell module fixing panel, a rear surface panel 7 inclined in the opposite direction to the solar cell module installation surface panel 6 as a windbreak panel, a front surface panel 9 installed on the opposite side, and a substantially triangular side surface panel 8.

[0043] In the framework of the wall structure made of the foam plastic, On its outer periphery As shown in FIG. 5, the front surface panel 9 and the side surface panel 8 are pasted, and the solar cell module installation surface panel 6 and the rear surface panel 7 are placed on top and pasted.

[0044] The foam plastic of the framework and the surface panel constituting the solar cell module installation stand 1 of the present invention has specific compressive strength, flexural strength, thickness, and oxygen index. The compressive strength is 10 N / cm 2 or more, the flexural strength is 15 N / cm 2 or more (JIS A 9521), the thickness is 10 mm or more, and the oxygen index is 26% or more (JIS K 7201) so as not to be subject to the designated combustibles of the Fire Service Act. A foam plastic panel having an adhesive force that causes cohesive failure with respect to the urethane film waterproof material is used.

[0045] As a foam plastic product satisfying the above conditions, it is sold as a heat insulating material with a width of 900 to 1000 mm × a length of 1820 to 2000 mm.

[0046] As the isocyanurate foam made of a thermosetting resin, TIFF0007698272000001.tif44166

[0047] As for the phenolic foam made of thermosetting resin, TIFF0007698272000002.tif49166

[0048] As for the bead method polystyrene foam made of thermoplastic resin, TIFF0007698272000003.tif44166 etc. are on sale.

[0049] In the above-mentioned various foamed plastic products, a facing material is laminated on the surface layer, and the facing material and the foamed plastic have the cohesive failure strength of the foamed plastic. Therefore, for the urethane coating waterproof material, the adhesive force at which the foamed plastic panel undergoes cohesive failure is selected such that the adhesive force between the urethane coating waterproof material and the facing material is equal to or greater than the cohesive failure strength of the foamed plastic. Or, the adhesive strength with the urethane coating waterproof material can be ensured by surface-treating the facing material.

[0050] Also, by using an aluminum foil for the facing material, the coating thickness of the urethane coating waterproof layer applied thereon can be non-destructively measured with an eddy current thickness gauge or the like, and the quality of the film thickness of the waterproof layer can be ensured.

[0051] As the surface treatment of the facing material, it is preferable to perform corona treatment (surface modification) with a corona treatment machine on a polyester film or an aluminum foil as an easy adhesion treatment, or use a product that has been corona-treated (surface-modified) with a corona treatment machine during film production. Also, as an easy adhesion treatment, after corona treatment with a corona treatment machine, it is preferable to apply a solvent-based ink containing a resin such as a polyurethane resin as a vehicle with a gravure roll or the like and dry it, or use a polyester film non-woven fabric or the like.

[0052] The power generation efficiency of a solar cell module depends on the panel temperature, and the higher the panel temperature, the lower the power generation efficiency. Therefore, for a foamed plastic product on which a solar cell module is installed, it is preferable that the compressive strength and flexural strength are high so that the thickness can be reduced, and the thermal conductivity is low so that heat storage in the solar cell module can be suppressed and the power generation efficiency can be ensured.

[0053] A product made of foamed plastic (width 900 - 1000 mm × length 1820 - 2000 mm) is processed into a wall panel 2, beam panels 3, 4, 5, a solar cell module installation surface panel 6, a rear panel 7, a side panel 8, and a front panel 9, which are the framework and face plates constituting the solar cell module installation stand of the present invention. Based on CAD data, etc., cutting is performed using an NC cutting machine (cutting plotter) that can precut into standard shapes, and each is processed into its respective shape to form the panel.

[0054] Among the panels processed for each panel, panels that are in contact with each other can be bonded with an adhesive or double-sided tape, etc., or they can be processed with concavo-convex shapes at the ends like a joint mat without bonding and combined.

[0055] Also, in order to bond the framework panel, side panel 8, front panel 9, solar cell module installation surface panel 6, and rear panel 7 assembled on-site, double-sided tape, etc. can be attached to the contacting portions, or it may not be attached.

[0056] The product panels processed into their respective shapes are assembled in a three-dimensional shape on a flat roof such that the panels inside the framework in the substantially north-south and substantially east-west directions intersect with a crossbeam, etc., and the panels inside the framework that contact the external panels intersect with a T-beam, etc. Also, the external panels that contact the internal panels are bonded together by adhesion, etc.

[0057] In addition, as shown in Fig. 13, the joints of the solar cell module installation surface panel 6, rear panel 7, front panel 9, and side panel 8 are treated with an adhesive tape 10 or a resin-based putty material.

[0058] The outer surface of the solar cell module installation pedestal 1 assembled into a three-dimensional shape was coated by spraying a urethane film waterproof material 13. (Refer to Fig. 14)

[0059] As the urethane film waterproof material 13, among the urethane rubber-based JIS A 6021 roof coating waterproof materials, there are a high elongation type (tensile strength: 2.3 N / mm 2 or more, tear strength: 14 N / mm or more, elongation at break: 450% or more) and a high strength type (tensile strength: 10 N / mm 2 or more, tear strength: 30 N / mm or more, elongation at break: 200% or more).

[0060] Thus, as the roof coating waterproof material, the urethane film waterproof material 13 can use the same material as the coating waterproof material of the flat roof where the solar cell module installation pedestal 1 of the present invention is installed.

[0061] Generally, a high elongation type urethane film waterproof material consists of a two-component type composed of a main agent (isocyanate prepolymer) and a curing agent (a compound obtained by kneading a polyol, a polyamine, a pigment, an inorganic filler, a plasticizer, etc.) and a one-component type composed of a compound obtained by kneading an isocyanate prepolymer, a dehydrated pigment, an inorganic filler, a plasticizer, and a latent curing agent (a curing agent that reacts with moisture (water) in the air earlier than the isocyanate prepolymer that generates carbon dioxide gas by reacting with moisture (water) in the air, generates a plurality of amino groups and hydroxyl groups, and reacts with the isocyanate prepolymer).

[0062] In the case of a two-component type, the high elongation type urethane film waterproof material is mixed with the two components of the main agent and the curing agent and spread using a trowel or a dedicated tool, etc., so that the two components chemically react and gradually cure to form a seamless waterproof layer without joints in about one day. Also, in the case of a one-component type, it is spread using a trowel or a dedicated tool, etc., so that it chemically reacts with moisture and gradually cures to form a seamless waterproof layer without joints in about one day.

[0063] For high-elongation urethane coating waterproofing materials, both two-component and one-component types include a flat surface product that can be smoothly finished by self-leveling when applied to the flat surface of a flat roof, and a rising surface product with thixotropic (rheopectic) properties that can form a coating film without dripping even when applied to a rising surface. By appropriately selecting the product according to the slope of the substrate to be coated, a seamless urethane waterproof layer without joints can be formed over the entire flat roof. Also, the standard total thickness of the urethane waterproof layer is 3.0 mm, and it is applied in two or more layers to ensure the thickness.

[0064] In addition, a general high-strength urethane coating waterproofing material is an ultra-fast curing urethane waterproofing material that heats the main agent and curing agent to a certain temperature with a dedicated machine to reduce their viscosity, pumps them through separate hoses, mixes them at the tip of a spraying gun, and sprays them. It cures in about 10 seconds after application and exhibits physical properties in about 30 minutes.

[0065] Since the high-strength urethane coating waterproofing material cures at the applied part without the sprayed mist leveling, it is possible to ensure the film thickness of the urethane coating film without distinguishing between flat surfaces and rising surfaces, etc. Therefore, the total thickness of the required continuous urethane waterproof layer can be ensured in one process.

[0066] For both high-elongation urethane coating waterproofing materials and high-strength urethane coating waterproofing materials, a top coat is applied to suppress the deterioration of the urethane coating waterproof layer by ultraviolet rays, maintain the aesthetics, and enhance the heat insulation property depending on the type to reduce the surface temperature rise. Top coats for urethane coating waterproofing include acrylic urethane-based, acrylic silicone-based, fluorine-based, etc., and each has a strong solvent, weak solvent, and water-based type.

[0067] The service life of the top coat is said to be about 5 to 10 years in the case of single coating, and it is said that the service life can be extended by more than double in the case of double coating. Since the product life of the solar cell module is assumed to be about 25 to 30 years, the service life of the top coat of the urethane waterproof layer will come soon. However, since the life of the urethane waterproof layer can be extended only by repainting the top coat, the waterproof layer and the solar cell module can be maintained at low cost.

[0068] Next, the installation work of the solar cell module installation stand 1 of the present invention will be described. As shown in FIGS. 10 to 12, the frame panel, side panel 8, and front panel 9 inside the stand assembled in a three-dimensional shape of the solar cell module installation stand 1 of the present invention are fixed to the installation location of the stand on the pitched roof using an adhesive or double-sided tape or the like.

[0069] The assembly of this solar cell module installation stand 1 is carried out at the construction site of a pitched roof such as on the roof, or the one assembled on the ground is carried in and placed. Basically, the frame panel inside the stand and the outer panel installed in a substantially north-south direction are inclined at 5 to 30° in proportion to the inclination angle of the solar cell module installed from the upper side to the lower side, and the height of the upper side and the height of the lower side are inclined.

[0070] Basically, the frame panel inside the stand and the outer panel installed in a substantially east-west direction have the same height as the frame panel inside the stand installed in the upper side and lower side directions, intersect with a crossbeam, and also have the same height as the outer panel installed in the upper side and lower side directions, and intersect with a T-shaped beam.

[0071] Before installing the solar cell module installation stand 1 of the present invention, as shown in FIG. 9, a primer 11 is applied to the floor of the pitched roof, or a ventilation buffer sheet is provided.

[0072] The solar cell module installation surface panel 6 and the rear panel 7 are bonded to the upper part of the pedestal, or after the framework panel inside the assembled pedestal, the external side panel 8, the front panel 9, the solar cell module installation surface panel 6 and the rear panel 7 are bonded to the upper part of the pedestal, it may be fixed to the pedestal installation location of the pitched roof using an adhesive or double-sided tape, etc.

[0073] For the joint parts between the outer panels of the solar cell module installation pedestal 1 of the present invention assembled in a three-dimensional shape as described above, and the joints of the solar cell module installation surface panel 6, the rear panel 7, the front panel 9 and the side panel 8, the surface is treated by pasting an adhesive tape 10 with a urethane coating film waterproof adhesive treatment or a mesh cross tape 12 with a thixotropic urethane resin, etc. This treatment is carried out when assembling the solar cell module installation pedestal 1.

[0074] Also, the joints between the external front panel 9 and side panel 8 of the solar cell module installation pedestal 1 and the pitched roof part are also treated by pasting a mesh cross tape 12 with a thixotropic urethane resin, etc.

[0075] After the treatment of the solar cell module installation pedestal 1 of the present invention as described above, if a urethane coating waterproof material 13 is applied to the entire pitched roof including such a foamed plastic pedestal, the solar cell module installation pedestal 1 and the pitched roof are covered without gaps by a seamless integrated urethane coating waterproof 13 layer.

[0076] After the construction of the urethane coating waterproof material 13, it is desirable to improve the durability of the urethane coating waterproof layer by applying a top coat to the entire surface to prevent the urethane waterproof coating layer from ultraviolet degradation.

[0077] As the primer 11 for the pedestal installation of the pitched roof and the construction surface of the urethane coating waterproof material, there are solvent-based urethane resin primers, solvent-based epoxy resin primers, water-based epoxy resin primers, etc. that have good adhesion with the urethane coating waterproof material. As the ventilation buffer sheet, there are products of waterproof manufacturers that conform to the Public Building Renovation Work Standard Specification (Building Work Edition) X-1 (Insulation Method).

[0078] For the pedestal of the present invention covered with the urethane waterproof material 13, the solar cell module is installed by adhesion and using a structural double-sided tape or the like.

[0079] The solar cell module has its outer periphery surrounded by a frame, tempered glass is used as a protective material on the module surface, the cells inside the module are sandwiched by a sealing sheet for adhesion and protection and fixation of the cells, and is composed of a back sheet for protecting the back surface of the module. The materials mainly used as modules are roughly classified into silicon-based and compound-based. In recent years, many lightweight and flexible solar cell modules that do not use tempered glass as a protective material have been sold, and by using such solar cell modules, further weight reduction of the roof can be achieved.

[0080] There are 29 types of permitted construction trades, and the acquisition of construction permits is carried out for each type of trade. The trade for installing a pedestal on the roof of a gabled roof and installing a solar cell module thereon is the electrical construction trade. Therefore, when the electrical construction trade installs a pedestal on the roof of an existing gabled roof, it lacks knowledge about waterproofing, drills holes in the building concrete and the pressing concrete, and embeds expansion type anchor bolts or adhesive type anchor bolts in the holes, resulting in frequent leakage accidents after the installation of the solar cell module. On the other hand, for the pedestal of the present invention, since the installation of the pedestal and the construction of the waterproof layer can be carried out only by the waterproofing construction trade, no leakage accident occurs after the installation of the solar cell module.

[0081] As described above, when covering the outer surface of the pedestal assembled by fitting together the foamed plastic framework panels and attaching the foamed plastic face panels thereto with a urethane coating waterproof material by spraying, although it was described as being by spraying, it is also possible to install the side face panels, the solar cell module installation surface panels, the rear panels and the front panels made of foamed plastic that have been pre-coated with the urethane coating waterproof material and process the joint parts on site, and it is also possible to install a pedestal made of foamed plastic that has been completely assembled and covered with the urethane coating waterproof material.

Explanation of Signs

[0082] 1…Solar cell module installation stand 2…Wall panel 2b, 2c, 2d, 3b…Notches 3, 4, 5…Beam panels 2a, 3a, 4a…Upper edges 6…Solar cell module installation surface panel 7…Rear panel 8…Side panel 9…Front panel 10…Adhesive tape 11…Primer 12…Mesh cross tape 13…Urethane coating waterproof material

Claims

1. A pedestal for installing a solar cell module, which is assembled by fitting together foamed plastic framework panels, and on the outer periphery of this assembly, a foamed plastic panel surface for installing a solar cell module that slopes, a rear panel that slopes in the opposite direction, a front panel installed on the opposite side, and a substantially triangular side panel are adhered. The pedestal is characterized in that a urethane coating waterproof material is coated on the outer surface of the pedestal.

2. The pedestal for installing a solar cell module according to Claim 1, wherein the joints of the solar cell module installation surface panel, the rear panel, the front panel, and the side panel, which are foamed plastic panels, are treated with an adhesive tape or a resin-based putty material, and a urethane coating waterproof material is applied thereon.

3. The foamed plastic panel has a compressive strength of 10 N / cm ２ or more, a flexural strength of 15 N / cm ２ or more (JIS A 9521), a thickness of 10 mm or more, an oxygen index of 26% or more (JIS K 7201) which is not subject to the application of designated combustibles under the Fire Service Act, and has an adhesive force such that the foamed plastic panel undergoes cohesive failure with respect to the urethane film waterproofing material. The mounting base for solar cell modules according to claim 1 or claim 2.

4. A roof waterproof construction method for a pedestal for installing a solar cell module, characterized in that a pedestal assembled by fitting together foamed plastic framework panels, and on the outer periphery of this assembly, a foamed plastic panel surface for installing a solar cell module that slopes, a rear panel that slopes in the opposite direction, a front panel installed on the opposite side, and a substantially triangular side panel are adhered, is installed on a flat roof, and a urethane coating waterproof material is applied to the entire flat roof including the pedestal.

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