JP2000226909A - Roof tile with solar battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof material with solar batteries in which prinwater or the like does not penetrate from the periphery of a solar battery stracture body into the inside and the periphral part of the stractural body is not broken. SOLUTION: In this roof tile 1 provided with solar batteries, a solar battery stracture body 12 is inserted in a recess 11a formed on the surface of a roof tile body 11. In the solar battery structure body 12, the upper and under faces of a solar battery cell or a solar battery module is covered with an impervious material or the like (glass plate, backfilm, ethylene-vinyl acetate copolymer, etc.), and the periphery of the laminated body made of the solar battery and the impervious material is inserted in an opening of a frame having a U-shaped section together with a sheet-shaped elastic seal material 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof tile with a solar cell, and more particularly, to a roof tile with a solar cell in which a solar cell structure is inserted into a concave portion provided on a surface of a roof tile body.

[0002]

2. Description of the Related Art In recent years, along with the seriousness of global environmental problems and energy depletion caused by increased consumption of fossil fuels such as coal and petroleum, solar cells have been installed on roofs of houses and the like to provide clean and endless. 2. Description of the Related Art A residential photovoltaic power generation system that converts natural solar energy directly into electric power and supplies it to a home has attracted attention.
As a method of installing a solar cell on the roof of a house or the like, a method of roofing a roof tile with a solar cell in which the solar cell is mounted on a roof tile body is often used. As such a roof tile with a solar cell, for example,
As described in Japanese Patent No. 28524, a shallow concave portion is provided on the surface of the roof tile body, and a solar cell structure (referred to as a solar cell element in this publication) protrudes from the surface in the shallow concave portion. There is known a roof tile with a solar cell in which the solar cell structure is inserted in a state, a peripheral portion of the solar cell structure is filled with an adhesive, and the solar cell structure is bonded to a roof tile body.

[0003] The roof tiles with solar cells are used in the same manner as the conventional roof tiles. First, the roof tiles with solar cells are laid on the underwater end of the roof base plate. Roof tiles with solar cells are placed side by side on the side edges of the roof tiles with tiles. With the underwater edge of the roof tile with batteries placed on the waterside edge of the roof tile with solar cells of the first stage, with the second stage solar cells overlapping the side edges in the same manner as the first stage Roof tiles are laid side by side. In this way, the roof tiles with solar cells are successively laid from the lower side to the upper side.

As another means, there is a method of mounting a frame on a roof material and mounting a solar cell on the frame. As a method of using this frame, for example, as described in JP-A-59-77253, a frame is assembled, and an energy collector such as a solar cell and a glass plate are attached to the frame, There is known an energy collecting roof in which a space is provided between an energy collector and a roof material and the frame is mounted on the roof. When the energy collector roof is irradiated with the sun and the energy collector is heated, air flows between the energy collector and the roofing material from below to above, and the flow of the air causes the energy collector to heat. It is intended to prevent a decrease in the power generation capacity of the solar cell.

[0005]

However, in the above-mentioned conventional energy collecting roof, it is necessary to make the frame large and sturdy in order to provide a space on the roof and mount the frame. There is a problem that it takes a long time to assemble, and the material cost and the assembly cost are extremely high. In addition, when the energy collector breaks down, if it is put on a glass plate mounted on the energy collector for repair, the glass plate is likely to be damaged, making it difficult to repair. There is also.

On the other hand, in the above-mentioned conventional roof tiles with solar cells, since a solar cell structure is attached to a roof tile main body, a robust frame is not required, and it is inexpensive and easy to construct. Moreover, when the solar cell fails, only the roof tile with the failed solar cell needs to be replaced, which is extremely convenient. However, with conventional roof tiles with solar cells,
Since the periphery of the solar cell structure is filled with an adhesive to bond the solar cell structure and the roof tile body, there are the following inconveniences. That is, since the adhesive generally has poor weather resistance, during long-term use, the adhesive deteriorates, and the adhesive is easily cracked. When the deterioration further progresses, the adhesive force is almost lost. I will.

On the other hand, a solar cell structure is generally formed by polymerizing the upper and lower portions of a solar cell with a film-shaped water-impermeable material and bonding the upper and lower water-impermeable materials protruding around the solar cell.
Water, such as rainwater, is prevented from entering from the upper and lower surfaces of the solar cell and from the surroundings. However, the structure is such that moisture easily penetrates from the adhesive portion of the surrounding impermeable material.

For this reason, if the roof tile with the solar cell is used by inserting the solar cell structure into the concave portion of the roof tile body and bonding the solar cell structure for a long period of time, the adhesive will crack due to aging.
There is a problem that rainwater penetrates into the inside of the solar cell structure from the cracks through the adhesive portion, wets the solar cells inside the solar cell structure, and loses power generation capability. Also,
If the adhesive strength is lost, the solar cell structure is peeled off from the roof tile body and dropped due to distortion due to the difference in thermal expansion between the roof tile body and the solar cell structure, vibration of vehicles passing on the road, etc. Problems also arise.

Further, since the solar cell structure is housed in the concave portion of the roof tile main body with its surface protruding, another object collides with the peripheral portion of the protruding portion of the solar cell structure, and this peripheral portion is caught. Parts are easily chipped. As described above, if the peripheral portion is chipped, rainwater easily penetrates into the solar cell structure from this portion, and as a result, the penetrated rainwater wets the solar cell, and the power generation capacity of the solar cell is reduced. There is.

The present invention has been made in view of the above-mentioned circumstances, and has a roof with solar cells in which rainwater does not enter from the periphery of the solar cell structure and the periphery of the solar cell structure is not chipped. The purpose is to provide tiles.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a roof with solar cells in which a solar cell structure is inserted into a concave portion provided on the surface of a roof tile body. According to the tile, the solar cell structure covers the upper and lower surfaces of the solar cell with a water-impermeable material, and cross-sections the periphery of a laminate comprising the water-impermeable material and the solar cell with a sheet-shaped elastic sealing material. It is characterized by being inserted into the opening of the character-shaped frame.

The invention according to claim 2 relates to a roof tile with a solar cell in which a solar cell structure is inserted into a concave portion provided on a surface of a roof tile main body. Covering the upper and lower surfaces with a water-impermeable material, affixing an adhesive tape provided with an adhesive layer on one surface of a sheet-shaped elastic sealing material, on the periphery of a laminate comprising the water-impermeable material and the solar cell, It is characterized in that a peripheral portion of the laminate is inserted into an opening of a U-shaped frame together with an adhesive tape.

According to a third aspect of the present invention, there is provided a roof tile with a solar cell according to the first or second aspect, wherein the sheet-like elastic sealing material is a sheet-like soft polymer material or a soft foam of a polymer material. It is characterized by having.

In the construction of the present invention, suitable materials for the roof tile body include, for example, ceramics such as ceramics, inorganic materials such as a cured product of a cement composition, metal materials such as aluminum and steel, polycarbonate and fiber-reinforced plastics. Organic materials can be raised. Alternatively, a composite material combining these may be used. The material is not limited to these.

The shape of the roof tile body may be such that a concave portion large enough to receive the solar cell structure is provided on the surface, and an output terminal box or the like attached to the solar cell structure is inserted at the same time. It is more preferable that a recess that can be used is provided. The depth of the concave portion may be arbitrary. For example, when the solar cell structure is inserted into the recess, the upper surface of the solar cell structure and the upper surface of the tile body may be substantially the same, or either may protrude upward. However, it is more preferable that the heights are approximately the same, because rainwater smoothly flows over the roof tile body and the solar cell structure. Also, if the length and width of the concave portion is slightly longer than the length and width of the solar cell structure to be inserted, due to the dimensional change caused by the difference in the coefficient of thermal expansion between the solar cell structure and the roof tile body, Even when the solar cell structure extends in the direction of the side wall of the roof tile body, the side wall is not strongly pressed, and as a result,
This is preferable because the solar cell structure and the roof tile body are not damaged.

The roof tile main body is provided at its side edge with an overlapping portion (for example, a strip-shaped rib or a step portion) on which the side edge can be overlapped and arranged. It is preferable that the upper roof tile main body be shaped such that the lower edge of the upper roof tile main body can be overlaid on the upper edge of the lower roof tile main body, because the roof tile is easy to roof. In the present invention, the solar cell structure is inserted into the concave portion provided on the surface of the roof tile body, but it is preferable to fix the inserted solar cell structure. As a fixing means, for example, there is a structure in which a locking portion is provided in a concave portion to lock and fix the solar cell structure.

The term "solar battery cell" as used in the present invention refers to a cell formed from a substance having a power generating ability and is not particularly limited. (Polycrystalline) semiconductors, amorphous semiconductors and the like are preferably used in the form of cells. Further, the solar cell module according to the present invention is obtained by connecting a plurality of solar cells in parallel or in series.

In the present invention, the upper and lower surfaces of the solar cell are covered with the water-impermeable material. However, the means for covering the upper and lower surfaces of the solar cell with the water-impermeable material is not particularly limited. However, the surface of the solar cell is covered with a translucent plate such as glass or acrylic resin, the back surface is covered with a water-impermeable back film, and the periphery is waterproofed with a waterproof resin. It is preferable because it can generate electricity by irradiating the solar cell, rainwater does not enter from the surroundings, and the power generation capacity of the solar cell does not decrease. Specifically, the upper and lower surfaces of the solar cell are covered with ethylene-vinyl acetate copolymer resin (EVA), a translucent plate such as glass is provided on the upper surface, and a back film made of polyvinyl fluoride resin (PVF) is provided on the lower surface. And a method in which the whole is heated and pressurized to melt the EVA, and the solar cell, the translucent plate and the back film are integrally bonded to each other. Further, a layer of a silicon-based semiconductor or the like is provided directly on the back surface of a light-transmitting plate made of glass or the like, the silicon-based semiconductor or the like is used as a solar cell, the back surface is covered with EVA, a back film is provided on the EVA, and heating is performed. The whole may be pressurized and integrated. If the periphery where the light-transmitting plate and the back film are overlapped is sealed with a waterproof resin, the waterproof property of the periphery can be improved.

The frame used in the present invention is formed by molding a material having good water resistance and weather resistance and high mechanical strength into a U-shaped cross section, and a water-impermeable material in the opening having the U-shaped cross section. It is a long body having a shape into which a peripheral portion of a laminate including a solar cell and a sheet-like elastic sealing material or an adhesive tape can be inserted. Preferred examples of the frame include a long body formed by molding a metal such as aluminum, aluminum alloy, stainless steel, iron, various rust-resistant plated steel materials, or a plastic such as a glass fiber reinforced plastic or a carbon fiber reinforced plastic into a U-shaped cross section. be able to.

The sheet-like elastic sealing material used in the present invention is formed by molding a flexible substance having elasticity and waterproofness into a sheet. Preferred examples of the elastic sealing material include a soft polymer material, a foam of the polymer material, and a cloth such as felt impregnated with a waterproof material such as tar. As in the configuration described, a sheet-shaped soft polymer material or a soft foam of a polymer material is more preferable.

Here, the soft polymer material is a soft polymer material such as a soft synthetic resin or rubber, and the soft synthetic resin is a soft vinyl chloride resin, a polyolefin resin, or the like.
Soft polyurethane resin and the like are preferable, and as the rubber,
Preferred are silicone rubber, butyl rubber, urethane rubber, acrylic rubber, and synthetic rubber such as EPDM (ethylene-propylene-diene terpolymer). In addition, a polymer foam is a foam of a polymer material such as synthetic resin or rubber, and is made of a foam of the above rubber, a polyolefin resin foam, a flexible polyurethane resin foam, a flexible polyvinyl chloride. Resin foams, polystyrene resin foams and the like are preferable, and the foaming ratio of this foam is 3 to 30.
Double is preferred.

The adhesive tape used in the second aspect of the present invention has an adhesive layer provided on one surface of the sheet-like elastic sealing material. The adhesive used at this time is not particularly limited, but a synthetic resin adhesive such as an acrylic adhesive,
A rubber-based pressure-sensitive adhesive mainly containing a rubber such as butyl rubber is preferable. Means for inserting the peripheral portion of the laminate including the water-impermeable material and the solar cell and the sheet-shaped elastic sealing material or the adhesive tape into the opening of the U-shaped frame are not particularly limited. For example, in a state where the sheet-like elastic sealing material is arranged along the peripheral portion of the laminate, the peripheral portion of the laminate and the sheet-like elastic sealing material may be simultaneously inserted into the opening of the frame. With the sheet-like elastic sealing material inserted into the opening, the peripheral portion of the laminate may be inserted into this opening, or the peripheral portion of the laminate may be inserted into the opening of the frame. In this state, a sheet-like elastic sealing material may be filled in the gap between the inner surface of the flange portion of the frame and the peripheral edge of the laminate.

In this case, after the adhesive tape having the adhesive layer provided on one surface of the sheet-like elastic sealing material is attached to the peripheral portion of the laminate, the adhesive tape is attached. It is preferable to insert the peripheral portion of the laminated body into the opening of the frame having a U-shaped cross section, since the insertion is easy.

When the peripheral portion of the laminate and the sheet-like elastic sealing material or adhesive tape are inserted into the U-shaped opening of the frame, the laminate is forcibly inserted into the U-shaped opening. The frame may be inserted, but the flange of the frame is expanded and inserted to return to its original state, or after insertion, the flange of the frame is pushed back and bent, and the sheet-like elasticity is If the sealing material is compressed, the sheet-like elastic sealing material presses the peripheral edge of the laminate by the pressure of the sheet-like elastic sealing material to return to the original state. This is preferable because the watertightness between the laminate and the peripheral portion is increased, and rainwater or the like does not enter the inside of the laminate. If the degree of watertightness is insufficient, it is preferable to apply a waterproof treatment such as applying a waterproof paint to this portion.

When the sheet-like elastic sealing material is a soft foam of a polymer substance, the thickness of the sheet-like elastic sealing material is made larger than the gap between the peripheral portion of the laminate and the flange surface of the frame. Then, if the sheet-like elastic sealing material is inserted in a compressed state between the peripheral portion of the laminate and the flange of the frame, the sheet-like elastic sealing material expands in an attempt to return to the original state. This is preferable because the watertightness of the portion is increased. As for the degree of compression, it is preferable that the compression ratio of the flexible foam made of a high-molecular substance is 50 to 90%.

The size of the opening having a U-shaped cross section of the frame is determined if the gap between the periphery of the solar cell and the periphery of the laminate is too wide when the periphery of the solar cell is inserted into the opening of the frame. If it is difficult to make watertight, and if it is too narrow, it is difficult to insert a sheet-like elastic sealing material, which is not preferable. A preferred gap is 1-3 mm.

[0027]

In the solar cell structure used in the first aspect of the present invention, the upper and lower surfaces of the solar cell are covered with a water-impermeable material, and the peripheral portion of the laminate comprising the water-impermeable material and the solar cell is a sheet. It is inserted into the opening of the U-shaped frame together with the elastic sealing material to improve the water tightness and mechanical strength of the peripheral part of the solar cell. The seal of the part is good and rainwater does not enter inside. And since the roof tile with a solar cell of this invention inserts this solar cell structure in the concave part provided in the surface of the roof tile main body, water such as rainwater can enter the solar cell. It is a good roof tile with a solar cell without a decrease in the power generation capacity of the solar cell.

Further, this solar cell structure can be easily manufactured by inserting the peripheral portion of the laminate together with the sheet-like elastic sealing material into the opening of the U-shaped cross-section frame. Has a simple structure, so it can be manufactured at low cost.In addition, roof tiles with solar cells need only be inserted and mounted in the recesses provided on the surface of the roof tile body. The cost can be significantly reduced, and the roof tile with solar cells can be manufactured at low cost as a whole. Therefore, it can greatly contribute to the reduction of the photovoltaic power generation cost. Further, since the frame is attached to the peripheral portion of the solar cell structure, the peripheral portion has high mechanical strength, and the peripheral portion of the solar cell structure does not chip during use.

The solar cell structure used in the invention according to claim 2 is a laminate comprising a water-impermeable material and a solar cell, wherein an adhesive tape having an adhesive layer provided on one surface of a sheet-like elastic sealing material is provided. Is attached to the peripheral portion of the laminate, and the peripheral portion of the laminate is inserted into the opening of the U-shaped frame together with the adhesive tape. The solar cell structure can be manufactured more simply than the invention according to claim 1 by merely inserting the peripheral portion of the laminated body to which the tape is adhered into the opening having a U-shaped cross section of the frame. Therefore, the roof tile with the solar cell according to the second aspect can reduce both the material cost and the processing cost compared with the first aspect of the invention, and can greatly contribute to the reduction of the solar power generation cost.

As described above, the solar cell structure is manufactured by inserting the peripheral portion of the laminate together with the adhesive tape into the opening having a U-shaped cross section of the frame to manufacture the solar cell structure. According to the present invention, the watertightness between the laminate and the sheet-like elastic sealing material (adhesive tape) is further increased as compared with the first aspect of the present invention, since the adhesive tape is adhered to the periphery of the laminate. Therefore, in the roof tile with the solar cell according to the second aspect, rainwater does not enter the solar cell, and the power generation capacity of the solar cell does not decrease. In addition, since the frame having high mechanical strength is attached to the peripheral portion, the peripheral portion of the solar cell structure does not chip during use.

According to a third aspect of the present invention, the sheet-like elastic sealing material is a sheet-like soft polymer material or a soft foam of a polymer material. The soft polymer material or the soft foam of the polymer material has good water impermeability, is easily compressed, and has a large force to return to the original shape due to elasticity. When a sheet-like elastic sealing material that is easy to be inserted together with the peripheral portion of the solar cell and that is thicker than the gap between the inner surface of the flange of the frame and the side edge portion of the laminate is inserted, this soft polymer material or polymer material is obtained. The flexible foam of Example 1 tries to return to the original shape, and strongly presses the peripheral edge of the laminate, so that the sealing property of this portion is good.

[0032]

Embodiments of the present invention will be described below with reference to the drawings. The description will be specifically made using an embodiment. First Embodiment FIG. 1 is a perspective view showing a configuration of a roof tile with a solar cell according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the roof tile with a solar cell and a roof tile body and a solar cell structure. FIG. 3 is an exploded perspective view showing a state where the solar cell structure is disassembled into a frame and a laminate, and FIG. 4 is an exploded perspective view showing the state shown in FIG.
FIG. 5 is an exploded perspective view showing the laminated body disassembled into constituent parts, and FIG. 6 is a sectional view showing a usage state of the roof tile with solar cells. As shown in FIGS. 1 and 2, the roof tile with solar cell 1 of this example includes a roof tile main body 11 and a solar cell structure 12. The roof tile main body 11 is formed by pressing a cement composition, and a concave portion 11a into which the solar cell structure 12 is inserted is provided substantially at the center of the upper surface of the roof tile main body 11, and 8 cm above the water. A plurality of nailing hole pedestals 11b are provided, and a nail hole 11c is formed substantially at the center of the nailing hole pedestal 11b.

The depth of the concave portion 11a is substantially the same as the height of the solar cell structure 12, and the vertical and horizontal lengths are slightly longer than the vertical and horizontal lengths of the solar cell structure 12. Therefore, when the solar cell structure 12 is inserted into the concave portion 11a, the upper surface of the roof tile body 11 and the solar cell structure 1
2 and the top surface of the roof tile body 1 and the roof tile body 1
1 causes the solar cell structure 12 to be recessed 11
Even if it moves in a, the wall of the concave portion 11a does not break.

Further, in order to make it easy to overlap the peripheral edges of the adjacent roof tile main bodies 11, the right peripheral edge parallel to the roof gradient is provided with a receiving step bent downward by the thickness of the left peripheral edge. A portion 11d is formed, and a lid portion 11e bent stepwise upward by the thickness of the right peripheral portion is formed on the left peripheral portion. Two rainwater guide grooves 11f are carved from the water side in the receiving portion 11d, and merge with one rainwater guide groove 11j near the center. A nailing pedestal 11g is provided along the edge on the outside of the rainwater guide grooves 11f and 11j of the receiving portion 11d.
Three nail holes 11h are formed in 1g.

As shown in FIG. 3, the solar cell structure 12 includes a laminate 12a, a frame 4, and a sheet-like elastic sealing material 5. As shown in FIG. 5, the stacked body 12a has sheet-shaped EVA on the upper and lower surfaces of a solar cell module 122 in which 20 solar cells 121 are connected in series.
123 is polymerized, a transparent 3 mm thick tempered glass plate 125 is formed on the upper surface, and a PVF back film 124 is polymerized on the lower surface, and the whole is united with EVA melted by heating and pressing. It is a rectangular plate.
As shown in FIG. 4, the frame 4 is a long body in which aluminum is formed into a U-shaped cross section including a flange portion 41 and a web portion 42. As shown in FIG. Are framed in a substantially rectangular shape with the opening 43 inside.

The distance between the flange portions 41 on both sides of the opening 43 having a U-shaped cross section is approximately 2 mm from the thickness of the laminated body 12a.
The vertical and horizontal lengths of the opening 43 are large, respectively.
It is about 4 mm longer than the length and width of 2a. Therefore, when the laminate 12a is inserted into the opening 43, a gap of approximately 1 mm is generated between the upper and lower flange portions 41, 41 of the laminate 12a, and the gap between the laminate 12a and the web portions 42 at both ends is formed. There is a gap of approximately 2 mm between each. The width of the flange 41 is approximately 3 m.
m.

The sheet-like elastic sealing material 5 has a thickness of about 1 m.
m, a sheet-like silicone rubber molded article having a width of about 9 mm. The sheet-like elastic sealing material 5 is bent into a U-shape, and as shown in FIG. Inserted between the V-shaped opening 43 and the laminate 1
The space between 2a and the sheet-like elastic sealing material 5 is watertight.

Next, a method for manufacturing and using the roof tile 1 with a solar cell will be described. As shown in FIG. 5, a film-shaped EVA 123 is placed on a tempered glass plate 125, a plurality of solar cells 121 are arranged, and the solar cells 121 are connected in series to form a solar cell module 122.
Then, the solar cell module 122 is placed on the film-like EVA 123, and another film-like EVA 123 is placed thereon.
The VA 123 is stacked, the back film 124 is weighed thereon, and the whole is heated and pressed to melt the EVA 123.
In this way, the molten EVA 123 is adhered to make the whole united. By cutting the EVA which has flowed out from the peripheral portion when the heating and pressurization is performed, a substantially rectangular laminate 1 is obtained.
2a is completed.

Next, the sheet-like elastic sealing material 5 is bent into a U-shape, and as shown in FIG. 4, the sheet-like elastic sealing material 5 is covered so as to cover the peripheral portion of the laminate 12a. Is inserted into the opening 43 having a U-shaped cross section together with the peripheral portion of.

In this manner, the distance between the flange portions 41 having a U-shaped cross section of the frame 4 is approximately 2 mm larger than the thickness of the laminated body 12a. Therefore, when the laminated body 12a is inserted into the opening of the frame 4, Since a gap of about 1 mm is formed on each side of the laminated body 12a, when the sheet-like elastic sealing material 5 having a thickness of about 1 mm is inserted into the gap, the elastic sealing material 5 is formed by the flange portion 41 of the frame 4. Is pressed against and closely adhered to the periphery of the laminated body 12a, and the space between the laminated body 12a and the sheet-like elastic sealing material 5 becomes watertight. If the degree of watertightness is insufficient, when the surface portions 41, 41 on both sides of the frame 4 are crushed, the sheet-like elastic sealing material 5 is pressed against the laminate 12a, and the elastic sealing material 5 is elastically deformed. Due to the force for returning to the state, the water-tightness between the sheet-like elastic sealing material 5 and the laminated body 12a is further improved due to the close contact. Thus, the solar cell structure 12 is completed.

Since the completed solar cell structure 12 has good watertightness at the periphery, it is possible to reliably prevent rainwater from entering the solar cell module 122. As a result, a decrease in the power generation capacity of the solar cell module 122 is suppressed. Further, the frame 4 is a long body having a U-shaped cross section and a simple structure, so that the frame 4 can be easily manufactured.
Since the solar cell structure 12 can be manufactured only by inserting the solar cell structure into the solar cell 3, the material cost and the processing cost of the solar cell structure 12 can be significantly reduced.

On the other hand, a concave portion 11a for inserting the solar cell structure 12 is provided at substantially the center of the upper surface of the cement composition by pressing, a receiving portion 11d and a cover portion 11e are provided on both sides, and a nailing hole base 11b is provided on the water side. Formed into a shape with
The roof tile body 11 is manufactured by drilling the hole c and the nail hole 11h.
Next, the concave portion 1 provided substantially at the center of the roof tile body 11
As shown in FIG. 2, when the solar cell structure 12 is inserted into 1a, the roof tile 1 with a solar cell in which the roof tile main body 11 and the solar cell structure 12 are integrated is completed.

As described above, the solar cell structure 12 can be manufactured at low cost, and the solar cell structure 12 can be easily manufactured simply by mounting the solar cell structure 12 in the concave portion 11 a provided in the roof tile body 11. In the end, the roof tile 1 with a solar cell can be manufactured at a low cost, which greatly contributes to a reduction in the cost of photovoltaic power generation.

Next, a method of using the roof tile with solar cell 1 of this example will be described with reference to FIG. A waterproof sheet 31 is laid on a base plate 3 of a building, and a roof tile 1 with a solar cell is laid thereon. In this roofing method, first, the roof tile 1 with a solar cell is placed on the left end of the baseboard 3 under water, and the nail hole 11
c, The nail 2 passed through 11h is driven into the base plate 3, and the roof tile 1 with a solar cell is attached.

Next, the lid 11e of the next roof tile 1 with a solar cell is arranged horizontally on the receiving part 11d on the right side of the roof tile 1 with a solar cell while overlapping the nail holes 11c, 1c.
A nail is driven into the base plate 3 through 1h, and the roof tile 1 with a solar cell is attached. In this manner, a plurality of roof tiles 1 with solar cells are laid under the field board 3 under water. Next, the roof tile with solar cell 1 is placed on the nailing pedestal 11b on the water side of the roof tile with solar cell 1 on the first stage while the underwater side of the roof tile with solar cell 1 in the second stage is placed on the roof tile 1 with one solar cell. As in the case of the roof tile 1 with solar cells in the tier, the roof tiles are laid side by side while overlapping the side edges.

In this manner, the roof tiles 1 with solar cells are sequentially laid from the lower side to the upper side, and the solar cell modules 122 of the respective roof tiles 1 with solar cells are connected. Be able to take out the generated power.
In the roof tile 1 with a solar cell roofed in this manner, the upper surface of the roof tile main body 11 and the upper surface of the solar cell structure 12 form substantially the same plane, and the peripheral portion of the solar cell structure 12 Since the frame 4 is attached, the peripheral portion of the solar cell structure 12 does not chip.

As described above, the roof tile with solar cell 1
In a sunny building, sunlight shines on the roof tile 1 with solar cells when the weather is fine. The solar cell 121 receives the sunlight and generates power, and the generated power is stored in a storage device or the like, or converted into AC by an inverter (not shown) and consumed as household power. When it rains, the rainwater falling on the roof flows from the roof tile 1 with solar cells above the water to the roof tile 1 with solar cells below the water. In addition, although the upper surface of the roof tile main body 11 and the upper surface of the solar cell structure 12 form substantially the same plane, rainwater flows smoothly on the roof tile 1 with solar cells.

At this time, the roof tile 1 with solar cells is usually used.
Rain water does not flow between the solar cell and the adjacent roof tile 1 with a solar cell, but there is a possibility that rain water sometimes enters during the heavy rain or the like. However, the rainwater flowing between the roof tile 1 with a solar cell and the adjacent roof tile 1 with a solar cell enters the rainwater guiding groove 11f, and the rainwater flowing through the rainwater guiding groove 11f becomes the rainwater guiding groove 11j. Therefore, there is no danger of rainwater leaking to the base plate 3 because it flows down to the surface of the roof tile main body 11 at the lower stage.

The vertical and horizontal lengths of the concave portion 11a are slightly longer than the vertical and horizontal lengths of the solar cell structure 12. Therefore, when the solar cell structure 12 is inserted into the concave portion 11a, And there is a slight gap on the side. Therefore, even if the solar cell structure 12 moves in the concave portion 11a due to a difference in thermal expansion between the solar cell structure 12 and the roof tile main body 11, the wall of the concave portion 11a is not broken. In addition, since the frame 4 is provided, the peripheral portion of the solar cell structure 12 has high mechanical strength, and the peripheral portion of the stacked body 12a is not damaged.

Second Embodiment Next, a second embodiment of the present invention will be described. FIG.
Is a perspective view showing a configuration of a roof tile with a solar cell according to a second embodiment of the present invention, FIG. 8 is a partially cutaway perspective view of an adhesive tape used for the roof tile with a solar cell, and FIG. FIG. 10 is a perspective view showing a configuration of a solar cell structure used for a roof tile with a solar cell, and FIG. 10 is an enlarged sectional view taken along line BB of FIG.

As shown in FIGS. 9 and 10, the solar cell structure 62 of this example has an adhesive tape 7 attached to the periphery of a laminated body 62a, and the laminated body having the adhesive tape 7 attached thereto. The periphery of 62a is inserted into the opening of the frame 4 having a U-shaped cross section. As shown in FIG. 8, the adhesive tape 7 has a butyl rubber-based pressure-sensitive adhesive layer 72 provided on one surface of a tape-shaped EPDM foam sheet 71 having a width of about 9 mm and a thickness of about 5 mm.

Therefore, the adhesive tape 7 may be attached to the laminate 62a.
When the adhesive tape 7 is inserted into the opening having a U-shaped cross section of the frame 4 while compressing the peripheral edge of the laminated body 62a to which the adhesive tape 7 is attached,
As shown in FIGS. 9 and 10, the adhesive tape 7 having a thickness of about 5 mm is inserted in a compressed state into about 1 mm between the peripheral portion of the laminated body 62 a and the inner surface of the flange of the frame 4. .

As described above, the solar cell structure 62 can be easily manufactured simply by inserting the adhesive tape 7 into the opening having the U-shaped cross section while compressing the adhesive tape 7. Since the compressed adhesive tape 7 is adhered to the peripheral portion of the laminate 62a, the compressed adhesive tape 7 tries to return to the original shape, and the inner surface of the flange of the frame 4 and the peripheral edge of the laminate 62a are removed. As a result of the pressing, the space between the adhesive tape 7 and the peripheral portion of the laminate 62a becomes watertight, the watertightness of this portion is good, and rainwater does not enter the internal solar cell. Therefore, a favorable solar cell structure 62 without a decrease in the power generation performance of the solar cell is obtained. When the solar cell structure 62 is inserted and mounted in the recess 61a of the roof tile main body 61 in substantially the same manner as in the first embodiment (FIGS. 1 to 6), the solar cell structure shown in FIG. It becomes the roof tile 6 with a battery.

As described above, the roof tile with solar cell 6 is manufactured by simply manufacturing the roof tile main body 61 provided with the concave portion 61a and inserting the solar cell structure 62 into the concave portion 61a of the roof tile main body 61. Therefore, the solar cell structure 62 can be manufactured simply by inserting the laminate 62a into the frame 4 because the frame 4 is simple and can be manufactured at a low cost. Therefore, the roof tile 6 with a solar cell can be manufactured at low cost simply by inserting the solar cell structure 62 into the concave portion 61a, and can greatly contribute to reduction in the cost of solar power generation.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like that do not depart from the gist of the present invention. Is also included in the present invention. For example, the roof tile body may be made of any of ceramic, metal, and plastic regardless of the material. Further, the solar cell structure is not limited to those of the above-described embodiments. For example, a silicon film is formed on the back surface of a glass plate, this silicon film is used as a solar cell, and a sealing material is provided on the back surface of the solar cell. And a frame may be attached to the periphery of the laminate. Further, the frame may be made of metal such as stainless steel or rust-prevention plated steel plate, or may be made of plastic such as reinforced plastic. The sheet-shaped elastic sealing material may be made of a synthetic resin such as a soft polyvinyl chloride resin or a polyolefin resin, or may be made of a foam obtained by foaming rubber or a synthetic resin.

[0056]

As described above, according to the first aspect of the present invention, the upper and lower surfaces of the solar cell are covered with the water-impermeable material, and the solar cell structure is formed of the water-impermeable material and the solar cell. By inserting the peripheral portion of the laminated body together with the sheet-like elastic sealing material into the opening of the U-shaped frame,
Since the watertightness of the peripheral portion of the solar cell is improved, the watertightness of the upper and lower surfaces and the peripheral portion of the solar cell structure is very good. For this reason, the infiltration of rainwater into the solar cell is reliably prevented, and a decrease in the power generation capacity of the solar cell can be suppressed.

The solar cell structure can be easily manufactured by inserting the peripheral portion of the laminate together with the sheet-like elastic sealing material into the opening of the frame having a U-shaped cross section. Further, since the roof tile body and the frame have simple structures, they can be manufactured at low cost. Therefore, roof tiles with solar cells need only insert and install the solar cell structure into the recesses in the roof tile body, significantly reducing material and processing costs and greatly contributing to a reduction in solar power generation costs. it can. Further, since the frame is attached to the peripheral portion of the solar cell structure, the peripheral portion of the solar cell structure does not chip during use.

According to the second aspect of the present invention, the solar cell structure comprises an adhesive tape having an adhesive layer provided on one surface of a sheet-like elastic sealing material, made of a water-impermeable material and a solar cell. It was attached to the peripheral portion of the laminate, and the peripheral portion of the laminate was inserted into the opening of the U-shaped frame together with the adhesive tape, so that the adhesive tape was attached to the peripheral portion of the laminate. Thereafter, the solar cell structure can be manufactured much more easily than the invention according to claim 1 simply by inserting the peripheral portion of the laminated body to which the adhesive tape is adhered into the opening having the U-shaped cross section of the frame. . Therefore, claim 2
The above described roof tile with a solar cell can further reduce the material cost and the processing cost as compared with the first aspect of the invention, and can greatly contribute to the reduction of the photovoltaic power generation cost.

Further, as described above, when the solar cell structure is manufactured by inserting the peripheral portion of the laminate and the adhesive tape into the opening having the U-shaped cross section of the frame, the solar cell structure is manufactured. The watertightness is increased as compared with the first embodiment.
Therefore, the roof tile with the solar cell according to the second aspect has no risk of rainwater entering the solar cell, and there is no reduction in the power generation capacity of the solar cell. In addition, since the frame having high mechanical strength is attached, the periphery of the solar cell structure does not chip during use.

According to the third aspect of the present invention, since the sheet-like elastic sealing material is a sheet-like soft polymer material or a soft foam of a polymer material, the inside of the opening having a U-shaped cross section of the frame is formed. It is easy to insert the sheet-like elastic sealing material together with the peripheral part of the solar cell while compressing the sheet-like elastic sealing material, and if a sheet-like elastic sealing material thicker than the gap between the inner surface of the frame flange and the peripheral part of the laminate is inserted, A soft polymer or a soft foam of a polymer tries to return to its original shape,
Since the periphery of the laminate is strongly pressed, the watertightness of this portion is good.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a configuration of a roof tile with a solar cell according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state in which the roof tile with solar cells is disassembled into a roof tile main body and a solar cell structure.

FIG. 3 is an exploded perspective view showing a state where the solar cell structure is disassembled into a frame and a laminate.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 5 is an exploded perspective view showing the laminated body into constituent parts.

FIG. 6 is a cross-sectional view showing a usage state of the roof tile with solar cells.

FIG. 7 is a perspective view schematically showing a configuration of a roof tile with a solar cell according to a second embodiment of the present invention.

FIG. 8 is a partially cutaway perspective view of an adhesive tape used for the roof tile with solar cells.

FIG. 9 is a perspective view schematically showing a configuration of a solar cell structure used for the roof tile with the solar cell.

FIG. 10 is an enlarged sectional view taken along the line BB of FIG. 9;

[Explanation of symbols]

 1,6 Roof tile with solar cell 11,61 Roof tile main body 11a Concavity 12,62 Solar cell structure 12a, 62a Stack 121 Solar cell 122 Solar cell module 4 Frame 43 Opening 5 Sheet elastic sealing material 7 Adhesive tape

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiharu Konno 2-4-4 Nishitenma, Kita-ku, Osaka Sekisui Chemical Industry Co., Ltd. (72) Hiroshi Akamatsu 2-4-4 Nishitenma, Kita-ku, Osaka Sekisui Chemical Within Industrial Co., Ltd. (72) Inventor Shigeru Sugita 22-22, Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Within Sharp Corporation (72) Inventor Hideki Yoshioka 22-22, Nagaike-cho, Abeno-ku, Osaka-shi, Osaka F term in the company (reference) 2E108 KK04 LL02 MM01 NN07 5F051 BA03 BA18 EA18 JA02 JA03 JA04 JA09

Claims (3)

[Claims] 1. A roof tile with a solar cell in which a solar cell structure is inserted into a concave portion provided on a surface of a roof tile main body, wherein the solar cell structure is a solar cell or a solar cell module. The upper and lower surfaces are covered with a water-impermeable material, and the periphery of the laminate comprising the water-impermeable material and the solar cell or the solar cell module is inserted into the opening of the U-shaped frame together with the sheet-like elastic sealing material. A roof tile with a solar cell, characterized in that: 2. A roof tile with a solar cell in which a solar cell structure is inserted into a concave portion provided on a surface of a roof tile main body, wherein the solar cell structure is a solar cell or a solar cell module. An adhesive in which the upper and lower surfaces are covered with a water-impermeable material, and an adhesive layer is provided on one surface of a sheet-like elastic sealing material on a peripheral portion of a laminate including the water-impermeable material and a solar cell or a solar cell module. A roof tile with a solar cell, wherein a tape is attached, and a peripheral portion of the laminate is inserted together with an adhesive tape into an opening of a frame having a U-shaped cross section. 3. The roof tile with solar cells according to claim 1, wherein the sheet-like elastic sealing material is a sheet-like soft polymer material or a soft foam of a polymer material.