JP2010031625A - Lightweight tile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight tile having practically sufficient strength. <P>SOLUTION: The lightweight tile 2 is formed with a plurality of recessed parts 6 recessed in plate shape, on one face of an impermeable tile body 4, and a non-recessed part 12 surrounding the recessed parts 6 is formed in grated shape. Each recessed part 6 can be filled with a porous body. The porous body can include filling pieces and a binder for connecting the filling pieces to one another, and the filling piece can be formed of a porous material. A method for manufacturing the lightweight tile 2 comprises preparing the tile body 4 formed with the plurality of recessed parts 6 recessed in plate shape, at a part of the one face, and filling each recessed part 6 with a mixture containing the filling pieces and a binder before hardening, and solidifying it. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lightweight roof tile. Moreover, it is related with the tile which has lightweight and heat insulation.

  As a lightweight and heat-insulating roof tile, one surface of the water-impermeable layer constitutes the surface of the roof tile, and the air-containing pore layer is fixed to the other surface of the water-impermeable layer. The inventor of the present application discloses a two-layered lightweight roof tile comprising a filler that binds the filler pieces constituting the filler piece group, and the filler pieces are made of a porous material (for example, Patent Document 1). reference).

However, in such a two-layered roof tile, the thickness of the entire roof tile becomes excessive unless the water-impermeable layer, that is, the main body of the roof tile is made thinner than a normal roof tile. If the main body of the tile is thinner than a normal tile, the strength of the tile may be insufficient.
JP 2003-147909 A

  In view of such a problem, an object of the present invention is to provide a lightweight roof tile having a practically sufficient strength.

The gist of the present invention is a lightweight roof tile in which a plurality of recessed portions are formed in a dish shape on the front surface of a non-permeable roof tile main body, and the non-recessed portions surrounding the recessed portions have a mesh shape. There is.
The non-depressed part may have a top view lattice shape.
Among the non-depressed portions, the width of the non-depressed portion located inside the non-depressed portion located at the periphery of the roof tile may be 10 to 40 mm.

  The length of one side of the depression may be 35 to 50 mm.

  The thickness of the depressed portion may be 0.3 to 0.7 times the thickness of the non-depressed portion.

  The material of the tile main body may be the same as the material of the clay tile, and the width of the non-depressed portion located inside the non-depressed portion located at the periphery of the tile may be 10 to 40 mm.

  The angle formed between the side wall surface of the eaves of the depressed portion and the tile surface connected to the side wall surface may be 200 to 225 degrees.

  The gist of the present invention is that the lightweight roof tile is formed by filling the depressed portion with an air-containing pore.

  Furthermore, the gist of the present invention resides in the lightweight roof tile in which a solar cell module having a sheet-like power generation layer is disposed in the depressed portion.

  Furthermore, the gist of the present invention is a lightweight roof tile in which a recessed portion is formed on the back surface of the non-permeable roof tile main body, and the depressed portion is filled with an air-containing pore.

  In the lightweight roof tile, the non-recessed portion surrounding the recessed portion may have a face-to-face mesh shape, and the recessed portion may be filled with a porous pore, and the non-recessed portion is located at the periphery of the roof tile. The width of the non-depressed part located inside the non-depressed part may be 10 to 40 mm.

  Further, the gist of the present invention is a method for producing a lightweight roof tile, comprising a step of firing a molding body made of a material used for clay roof tiles, wherein the molding body has a plurality of depressions that are depressed in a dish shape. The present invention resides in a method for manufacturing a lightweight roof tile in which a depressed portion is formed.

  In the method for manufacturing the lightweight roof tile, the non-depressed portion surrounding the depressed portion may have a mesh shape, and the thickness of the depressed portion may be 0.3 to 0.7 times the thickness of the non-depressed portion. The width of the non-depressed portion located inside the non-depressed portion located at the periphery of the roof tile may be 10 to 40 mm after firing.

Further, the gist of the present invention is a method for manufacturing the lightweight tile,
A step of preparing a tile body in which a plurality of depressed portions depressed in a dish shape are formed on a part of one side;
Mixing a mixture containing a filler piece made of a porous material and a binder before curing to obtain a precursor of the porous body;
Filling the depressed portion with the precursor;
And a step of solidifying the filled precursor.

Still further, the gist of the present invention is a method for producing the lightweight roof tile,
A step of preparing a roof tile body and a porous body formed with a plurality of recessed portions recessed in a dish shape on a part of one side;
It is in the manufacturing method of the lightweight roof tile including the process of loading this air-containing hole body in the said depression part.

  According to the present invention, there is provided a lightweight roof tile having a practically sufficient strength, an elegant appearance and a personality.

  The lightweight roof tile of the present invention can grow moss on the surface. The heat insulation of lightweight tiles is further enhanced by the growth of moss. In addition, the green portions overgrown with moss are arranged with a mesh-like boundary portion such as a lattice shape, so that the aesthetic appearance of the roof is improved.

  Since the lightweight tile of the present invention is in a state where rainwater is retained by the tile when it rains, the roof is cooled by the heat of vaporization of the retained water after the rain and contributes to the cooling of the building. The retained water stays in the air-containing pores for a long time regardless of the slope of the roof, and this cooling effect is maintained for a long time.

  The aspect of the lightweight roof tile of this invention is demonstrated. In addition, in this specification, the same code | symbol written over each figure shows the same or similar member and thing. As shown in FIG. 1, the lightweight roof tile 2 of the present invention is formed by filling a plurality of depressed portions 6 formed on a part of one surface of a water-impermeable roof tile body 4 in a layered manner. The pores in the pore-containing body 8 may be independent holes or communication holes.

  The depressed portion 6 is surrounded by a non-depressed portion 12 that goes around the edge of the depressed portion 6. The non-recessed portion 12 has a portion that exists in the circumferential edge portion 14 that circulates around the edge portion of the roof tile body 4 and a portion that exists on the inner side of the circumferential edge portion 14. It has a mesh shape as a component.

  The non-depressed thickness hn (FIG. 7) of the non-depressed portion 12 in the thickness direction of the tile body 4 is 0.3 to 0.7 times the thickness of the tile, that is, the thickness H of the non-depressed portion. . The thickness k of the tile body 4 in the depressed portion 6 is 0.3 to 0.7 times H. It is further more preferable that it is 0.3 to 0.6 times in order to achieve both the strength and light weight of the roof tile. H is preferably the thickness of a normal roof tile.

  The width W of the ridges 13 (portions corresponding to the mesh strands) constituting the non-recessed portion 12 is preferably 10 mm or more in order to achieve both the strength and heat insulation of the roof tile. When the width W of the ridges 13 is less than 10 mm, the strength of the roof becomes insufficient. In addition, if the width W of the ridges 13 exceeds 50 mm at all points, the total area of the exposed surfaces of the air-containing pores 8 becomes too small to obtain sufficient heat insulation. In particular, when the material of the tile main body is the same material as that of the conventional clay tile, the width Wb of the ridge 13b positioned inside the peripheral ridge 13a positioned at the peripheral portion of the non-recessed portion 12 is 10 to 40 mm. It is preferable to have both the strength and heat insulating property of the roof tile, the solid appearance, elegance and style. W and Wb are the lengths measured as the length between the upper edges 13 of the depressions along the surface of the roof tile. The width W of the ridge 13 at the circumferential edge 14 is preferably 25 to 60 mm. The peripheral ridge 13a is a ridge located so as to extend along the outer periphery of the roof tile as viewed from above.

  The raw material for clay roof tiles is composed of clay as the main component, and chamotte, sand, and other additive materials added to it in a blend specific to the production area.

  The shape of the depressed portion 6 when viewed from above is preferably rectangular. It may be a triangle, rhombus, hexagon, polygon, circle, ellipse, or oval. The non-recessed portion 12 may have a net shape such as a Japanese character shape, a rice field shape, an eye shape, or a lattice shape (also referred to as a cross-beam shape or a grid shape) with a larger number of eyes as viewed from above. preferable. It may be a mesh shape in which two square shapes are combined in the horizontal direction. A mesh shape in which a portion corresponding to a so-called rope (strand) of the mesh crosses may be T-shaped. It may have a mesh shape such as an irregular melon mesh.

  FIG. 2 shows a lightweight roof tile 2d when the non-recessed portion 12 has a grid shape with nine grids.

  In order to achieve both the strength and light weight of the roof tile, the mesh shape by the non-recessed portion 12 may be a mesh shape obtained by combining two letter shapes as shown in FIG. 1 in the horizontal direction, or as shown in FIG. It is more preferable that the mesh has a grid shape of nine grids.

  In order to achieve both the strength and light weight of the roof tile, the mesh shape of the non-recessed portion 12 is approximately 4-5 in the vertical direction and 4-5 in the horizontal direction as shown in the lightweight roof tile 2e in FIG. More preferably, it has a grid-like mesh shape. In this case, the non-recessed portion 12 is extended in the shape of a top view in the vertical and horizontal directions of the roof tile as viewed in the plan view to form a lattice shape, and the depressed portion 6 has a top view square shape. In this aspect, even if a person steps on the position corresponding to the depressed portion 6, the load from the foot is also applied to the non-depressed portion 12 e around the depressed portion 6 e, so that the load from the foot is applied only to the depressed portion 6 e at that position. There is almost no possibility that the depressed portion 6e having a thickness in the thickness direction of the tile thinner than that of the non-depressed portion 12e is destroyed.

  In the embodiment shown in FIG. 3, the width h of the non-recessed portion 12e of the cross-shaped mesh-shaped portion is more preferably 11 to 17 mm in order to achieve both the strength and light weight of the roof tile. When h is larger than 17 mm, the total top view area of the depressed portion 6e of the entire roof tile is reduced, which is not the best in terms of light weight. When h is less than 11 mm, it cannot be said that the strength of the entire roof tile is the best. It is preferable that the shape of the depression 6e in the grid-like mesh-shaped portion in a top view is a square having side lengths k and k 'of 35 to 50 mm in order to achieve both the strength and light weight of the roof tile.

  Further, in the present invention, when a dough made of clay or the like is molded to form a molded body, and the molded body is manufactured by firing, the tile formed by firing the molded body having a depression is the same as the molded body. It was found that the bending strength was higher than that of a tile formed by firing a molded body having substantially the same thickness and no depressions, that is, no irregularities due to depressions on the surface. The reason why the former roof tile is higher in strength than the latter roof tile is because the thickness of the molded part in the depressed part in the baking process in the tile manufacturing process is the thickness of the molded article having no depressed part. This is considered to be due to the fact that the degree of baking due to firing of the molded body at the depressed portion is further increased because it is thinner. It is conceivable to increase the firing temperature or lengthen the firing time in order to increase the degree of baking even in a molded body having no depression, but excessive increase in the firing temperature may cause cracking. However, firing at a higher temperature or longer than usual is not preferable because it causes an excessive burden of energy costs.

  In the present invention, by limiting the shape of the non-recessed portion and the thickness of the recessed portion, the weight is 0.80 to 0.95 times that of a normal roof tile, and is equal to or approximately 1.1 times that of a normal roof tile. A lightweight roof tile of up to 3 times higher strength can be obtained. For example, according to the explanation of clay in JIS A 5208-1996, “There was a request to change the value of bending fracture strength from the current 1500 N to 1200 N for the development of lightweight straw from some localities. The clay is also an advantage of straw for other roofing materials, and we decided to try to reduce the weight by developing technology without changing the strength. ” In the present invention, a lightweight roof tile having a bending fracture strength of 2200 to 3000 N is obtained even when the weight is 0.9 times that of a normal roof tile using the same raw material as that of a normal roof tile. A technology that meets the needs of the industry is realized by the present invention.

  In such a lightweight roof tile of the present invention, the thickness of the non-recessed portion is 1 to 1.1 times the thickness of the normal roof tile, and the thickness of the recessed portion is 0.3 to 0. 0 of the thickness of the non-recessed portion. The shape of the ridges 13 (portions corresponding to the mesh strands) constituting the non-recessed portion 12 is a lattice shape as shown in FIGS. 2 and 3, and the width of the non-recessed portion excluding the outer peripheral portion (Wb) Is equivalent to 10 to 40 mm. Moreover, it is preferable for obtaining a high-strength lightweight roof tile that the shape of the depression 6e in the cross-shaped mesh-shaped portion in a top view is a square having side lengths k and k 'of 35 to 50 mm. A 38-45 mm square is preferable for obtaining a high-strength lightweight roof tile.

  In the present invention, in order to obtain a high-strength roof tile by molding and firing a base material made of a material used for a normal clay roof tile, the thickness of the non-recessed portion is set to the thickness of the normal roof mold base. The thickness is set to 1 to 1.1 times the thickness, the thickness of the depressed portion is set to 0.3 to 0.7 times the thickness of the non-depressed portion, and the non-depressed portion of the molding base corresponding to the non-depressed portion 12 is configured. The shape of the ridges (portions corresponding to the mesh strands) is a lattice shape, and the width of the non-depressed part excluding the peripheral ridges is set to a width of 10 to 40 mm after firing in anticipation of shrinkage due to firing. Is preferred. The shape of the depressed portion corresponding to the depressed portion 6e of the molding substrate in a top view is such that the lengths k and k ′ of one side are assumed to be a square of 35 to 50 mm after firing in consideration of shrinkage due to firing. It is preferable for obtaining the high-strength roof tile of the present invention.

  Furthermore, in the present invention, as shown in the sectional end view of the main part of FIG. 4, the left and right side wall surfaces 15 of the depression 6e have a gradient in the direction of increasing the width of the recess from the bottom toward the upper opening. It is preferable from the ease of die-cutting of the green body before firing. FIG. 4 is a cross-sectional end view of a main part in the yy direction (FIG. 3).

  Further, as shown in the sectional end view of the main part of FIG. 5, it is preferable from the viewpoint of easy die cutting that the surfaces of the upper and lower side walls of the depressed portion 6e also have a slope extending from the bottom toward the upper opening. In the embodiment in which the depressed portion 6e is opened upward, the angle α between the side wall surface 17 below the depressed portion 6e (the eaves) and the surface 19 of the roof tile connected to the side wall surface 17 is 200 to 225 degrees. It is preferable. In addition, regarding FIG. 5, the top, bottom, left, and right refer to the direction of the top view when the roof tiles are rolled. FIG. 5 is a cross-sectional end view of the main part in the zz direction (FIG. 3). In this case, the angle β formed by the side wall surface 17 and the bottom surface 29 of the depressed portion is 135 to 160 degrees.

  In the aspect in which the depressed portion 6e is opened upward, if the side wall surface 17 below the depressed portion (6e) is perpendicular to the surface of the tile, the thickness direction of the tile in a state where the lightweight tile 2z is rolled up As shown in the longitudinal sectional end view (FIG. 6), the rainwater 21 stays below the depression (6e), which is not preferable because of a bow flutter or the like. As shown by the dotted line, when the side wall surface 17 has a gradient angle α with respect to the surface of the roof tile, no or little rainwater stays below the depression 6e.

  The material of the tile main body in the present invention is not particularly limited as long as it is non-permeable and durable as a tile, and is not particularly limited to cement products, metals, ceramics, etc. Japanese tiles such as Sanshu tile, Ishizu tile, Awaji tile, etc. In view of the appearance of the roof tile, it is preferable that the pottery is manufactured in accordance with a normal roof tile manufacturing process using a known blended clay used for flat roof tiles.

  FIG. 7 is a schematic cross-sectional view in the AA direction of the lightweight roof tile 2 shown in FIG. As shown in FIG. 7, the air-containing pores 8 are composed of a large number of filling pieces 16 made of a fine lump and a binder 18 that bonds the filling pieces 16 together. The filling piece 16 is made of a granular material obtained by pulverizing a concrete material containing many fine bubbles, such as a lightweight cellular concrete panel (ALC). The binder 18 is formed by hardening cement.

  Since the filling piece 6 is made of a concrete material containing a large number of fine bubbles, the light-weight roof tile 2 having such a structure can be used even if the thickness T is about the thickness of a normal clay roof tile or more. Lighter than clay roof tiles. And it has the outstanding heat insulation.

  In order to obtain the lightweight roof tile of the present invention, a tile-like ceramic (FIG. 9) is prepared as a whole constituting the roof tile body 4, and the filling piece 16 obtained by pulverizing a concrete material containing bubbles with a pulverizer. And a mortar as a binder 18 are mixed to form a paste-like mixture, and the mixture is applied to the depressed portion 6 to form a lightweight roof tile 2 as a whole, and then cured. Made with lightweight roof tiles 2.

  Alternatively, the paste-like product may be formed into a cured product formed by curing the paste-like product in the shape of the air-containing pores 8 in advance, and the cured product may be fitted into the depressed portion 6 to form the lightweight roof tile 2.

  Furthermore, a known porous body made of ceramic or resin may be used in place of the molded cured product. This porous body may be cut out and formed into a predetermined shape. For example, a flame retardant foamed resin may be used. It may be formed by foaming or curing in a mold having a predetermined shape during the manufacturing process.

  To the mortar as the binder 18 before curing, a paste such as a water-soluble cellulose ether may be added for preventing cracking at the time of initial shrinkage. Resin powder and cement reinforcing fiber may be added.

  Further, a tile-like ceramic is prepared as a whole to constitute the tile body 4, and a pulverized product made up of filling pieces 16 obtained by pulverizing a concrete material containing bubbles with a pulverizer, and clay as a binder 18, etc. Mixing clay and appropriate amount of water to make a paste-like mixture, applying the mixture to the depression 6 and forming it into the shape of the lightweight roof tile 2 as a whole, and then curing it by firing to form a lightweight roof tile. Can also

  Alternatively, a precursor (clay molded product) of the pottery constituting the roof tile body 4 is prepared, and this paste-like material is applied to a portion corresponding to the depressed portion 6 of the precursor to form the lightweight roof tile 2 as a whole. , Then fired with the precursor and cured to form a lightweight roof tile

  Further, a tile-like ceramic is prepared as a whole constituting the tile main body 4, and a pulverized product composed of a filler piece 16 obtained by pulverizing a bubble-containing concrete material with a pulverizer, and a resin adhesive as a binder 18. Can be made into a paste-like mixture, the mixture is applied to the depression 6 and formed into the shape of the lightweight roof tile 2, and then the adhesive is cured to form a lightweight roof tile.

  In the present invention, as the filling piece 16, in addition to those obtained by pulverizing the above-described concrete containing bubbles with a pulverizer, a resin porous material such as expanded polystyrene, a pulverized product thereof, or a resin hollow Particles, fired pearlite or foamed pearlite can be used.

  In another aspect of the present invention, the air-containing pore body 8 includes pores 20 formed of voids between the filling pieces 16a as shown in the partial enlarged cross-sectional schematic diagram of FIG. As the filling piece 16a, sand, fine crushed stone, concrete pulverized material, ALC pulverized material, waste plastic pulverized material, resin porous material such as foamed polystyrene and pulverized material thereof, resin hollow particles, fired pearlite Further, granular materials such as foamed perlite can be used.

  In order to obtain the lightweight roof tile of the embodiment shown in FIG. 8 of the present invention, a resin adhesive is used as the binder 18, and the resin adhesive and the filling piece 16a are in a volume ratio of 1: 1.2 to 1:10. The mixture can be mixed to form a mixture, and the mixture can be applied to the depression 6 of the roof tile body 4 to form the light roof tile 2 as a whole, and then cured to form a light roof tile. Here, the volume of the filling piece 16a is an apparent volume of the aggregate of fine lumps constituting the filling piece 16a, and is measured with a measuring basket. The volume of the resin adhesive is a volume of solid content excluding the solvent.

  When the filler piece 16a is made of an inorganic material, the filler piece 16a is mixed with ALC raw materials (crushed quarry stone, cement, quicklime, foaming agent (aluminum powder), stabilizer, water) as the binder 18. Then, a paste-like mixture can be made, and the mixture can be applied to the depressed portion 6 of the roof tile body 4 to be formed into the shape of the lightweight roof tile 2 as a whole, and then cured by firing with an autoclave to form a lightweight roof tile. Also in this case, it is preferable to mix the binder 18 and the filling piece 16a in a volume ratio of 1: 1.2 to 1:10.

  Furthermore, when the filling piece 16a is made of an inorganic material, the filling piece 16a is mixed with clay such as clay, a burnable powder such as resin beads, and an appropriate amount of water to form a paste-like mixture. It can also be applied to the depression 6 (FIG. 9) and formed into the shape of the lightweight roof tile 2 as a whole, and then cured by firing to form a lightweight roof tile. In this case, the resin powder is burned out or decomposed during firing, and the remainder becomes a cavity, and this cavity becomes a pore 20 composed of a void.

  Alternatively, a precursor of the ceramics constituting the tile body 4 is prepared, and this mixture containing the burnable resin powder is applied to a portion corresponding to the depressed portion 6 of the precursor to form the lightweight tile 2 as a whole, Thereafter, it can be fired and cured together with the precursor to form a lightweight roof tile.

  In still another embodiment of the present invention, a clay-like clay, a burnable powder such as resin beads, and an appropriate amount of water are mixed to form a paste-like mixture, and the mixture is made of a baked product. It can also be applied to the depressed portion 6 (FIG. 9) of the tile body 4 and formed into the shape of the lightweight tile 2 as a whole, and then cured by firing to form a lightweight tile. In this case, the resin powder is burned out or decomposed during firing, and the remainder becomes a cavity, and a porous body is obtained.

  Alternatively, a precursor of the ceramics constituting the tile body 4 is prepared, and the paste-like material containing the burnable resin powder is applied to a portion corresponding to the depressed portion 6 of the precursor to form the shape of the lightweight tile 2 as a whole. Then, it can be fired and cured together with the precursor to form a lightweight roof tile.

  In addition, a tile-like ceramic is prepared as a whole to constitute the tile body 4, and a pulverized product made of a filling piece 16 obtained by pulverizing a bubble-containing concrete material with a pulverizer, and before firing as a binder 18. ALC raw materials (ground crushed stone, cement, quicklime, foaming agent (aluminum powder), stabilizer, water) are mixed to make a paste-like material, and the paste-like material is applied to the depression 6 It can also be formed into a lightweight roof tile 2 as a whole and then cured by firing with an autoclave to form a lightweight roof tile.

  The lightweight roof tile thus obtained can make the apparent specific gravity of ALC as the binder 18 smaller than that of normal ALC. Usually, if the apparent specific gravity is reduced, the strength of ALC decreases, which is not preferable. However, in the present invention, the filler pieces 16 are mixed, and even if the apparent specific gravity of the ALC as the binder 18 is reduced, the molded article is not suitable. The required strength is maintained. Therefore, the lightweight tile in this case can be further reduced in weight as compared with the tile using the conventional ALC as the air-containing pores 8. In such an embodiment, the binder 18 is made of a porous body. The binder 18 may be made of a foamed resin such as flame retardant foamed urethane.

  In the lightweight tile of the present invention, the tile main body (4, etc.) may be made of grilled material, but is made of a material used for metal tiles, fiber-reinforced cement plate tiles, resin tiles, etc. Also good. Moreover, the shape of the lightweight roof tile of the present invention can be selected from various types of Japanese-style straws, Western-style straws, and modified ones depending on the application.

  In the lightweight roof tile of the present invention, a coating layer that covers at least a part of the air-containing pores may be provided on the surface of the air-containing pores 4 opposite to the surface facing the tile main body.

  The lightweight roof tile of the present invention has a mesh-shaped non-recessed portion, thereby having a practically sufficient strength. Moreover, even if it has a thickness equivalent to that of a normal roof tile, the porous body can be made sufficiently thick, and excellent heat insulation can be imparted.

  The lightweight roof tile of the present invention is used in the configuration shown in FIGS. 1 and 2 in which the depression 6 is formed on the front surface of the roof tile body 4 and the upper surface of the air-containing pore body 8 is exposed on the top surface of the roof tile. In this state, the surface of the porous body 8 is exposed upward on the roof. When the porous body 8 has communication holes, moss can be grown on the exposed surface of the porous body 8. The heat insulation of lightweight tiles is further enhanced by the growth of moss. In addition, the green portions overgrown with moss are arranged with a mesh-like boundary portion such as a lattice shape, so that the aesthetic appearance of the roof is improved. Furthermore, since rainwater is retained in the air-containing pores 8 during rainfall, the roof is cooled by the heat of vaporization of the retained water after the rain, contributing to the cooling of the building. Due to the presence of the non-recessed portion 12 that circulates around the porous body, the retained water stays in the porous body for a long time regardless of the slope of the roof, and this cooling effect is maintained for a long time.

  Moreover, like the lightweight roof tile 2a of the present invention shown in FIG. 10, in a configuration in which the depressed portion 6a is formed on the back surface 22 of the roof tile body 4a and the surface of the air-containing pores 8a is exposed on the back surface of the roof tile, In this state, the surface of the air-containing pore body 6a is exposed downward on the roof. In this case, while having excellent heat insulation, the profound feeling of the used roof, the grace and appearance of the appearance can be made the same as those of a normal tile roof.

  The lightweight roof tile of the present invention having the air-containing pores also has a heat insulating property.

  Furthermore, as shown in FIG. 11, the lightweight roof tile of the present invention may be a lightweight roof tile 2 b that includes only the roof tile body 4 without the air-containing pores. In this embodiment, rain water can be retained in the depression 6 by opening the depression 6 upward. The accumulated rainwater can block the solar heat, especially in summer, and obtain good heat insulation. Furthermore, the roof cooling effect can be obtained by the evaporation heat of rainwater. The lightweight tile 2b also has excellent heat insulation properties, and can make the heavy feeling of the roof in use and the grace and appearance of the roof almost the same as those of a normal tile roof.

  The overall shape of the lightweight roof tile of the present invention may be a Japanese roof tile shape as shown in FIG. 1, or may be a flat roof tile shape like the lightweight roof tile 2c shown in FIG.

  As shown in FIG. 13, the lightweight roof tile of the present invention may be provided with a solar cell module 50 including a sheet-like power generation layer in the depression 6. By stroking the lightweight tile 52 on which the solar cell module 50 is arranged, the construction work can be saved compared with the case where the solar cell panel is installed on the upper surface after the roof is covered with the tile. It can maintain the same aesthetics as the roof. The lightweight roof tile 52 of the present invention in which the solar cell module 50 is disposed has a mesh shape with the ridges 13 as a whole (see FIG. 1), so that it is sufficient as a roof tile. Has strength. On the other hand, in the conventional system in which the solar cell module is disposed in the concave portion formed in the roof tile, the peripheral portion of the roof tile is a non-recessed portion, and the concave portion surrounded by the peripheral portion is the peripheral portion of the roof tile. Since it extends over the entire front surface, there is a problem that the strength of the roof tile in the recess is small, and therefore the strength of the roof tile as a whole is small.

  As shown in FIGS. 14 (a) and 14 (b), the solar cell module 50 is disposed in each of the lighted roof tiles 2 ′ or the respective depressed portions 6 of the lightweight roof tile 2 ″, but overlaps with the adjacent roof tiles. It will not be disposed in the depressed portion 6 (the depressed portion 66) in the lower portion. 13 and 14, the solar cell module 50 has a terminal (not shown), and the terminal is connected to a lead wire (not shown) extending from the roof of the roof tile.

A clay roof tile was produced as follows.
Raw material formulation of molded body for firing:
30 parts by weight of Katsuiwa
30 parts by weight of clay (origin: Ryuo)
30 parts by weight of sand
Chamotte 10 weight part roof tile shape: It was a shape according to J type 53A. However, the depression (6) was formed at a position as shown in FIG. The thickness of the non-depressed part was 17 mm, and the thickness of the depressed part was 6 mm. The size of the depressed portion in the top view is four on the left side, 42 mm in length × 30 mm in width, one in the lower right is 42 mm in length × 15 mm in width, and the rest is 42 mm in length × 42 mm in width. The width h of the depressed portion was 15 mm.
Firing conditions: Temperature rise from room temperature to 500 ° C. over 7 hours → temperature rise to 1100 ° C. at a rate of 50 ° C./hr → then keep at 1100 ° C. for 1.5 hours → temperature drop to 950 ° C. over 2 hours → 1 Sprinkling with time → natural cooling The average value of 4 pieces of bending fracture strength (according to JIS A 5208) of the obtained clay roof tiles was 2755N. The weight was 2.65 kg. The weight of clay roof tiles obtained with the same raw material composition and firing conditions as described above in the shape of J-type 53A with a thickness of 16 mm and no depressions is about 3.10 kg, and the bending fracture strength is an average of 4 bodies. The value was 2547N.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications, and changes are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

It is a top view which shows an example of the aspect of the lightweight roof tile of this invention. It is a perspective schematic diagram which shows the other aspect of the lightweight roof tile of this invention. It is an upper surface schematic diagram which shows the further another aspect of the lightweight roof tile of this invention. It is a cross-sectional end view of the yy direction of the lightweight roof tile shown in FIG. FIG. 4 is a cross-sectional end view in the zz direction of the lightweight roof tile shown in FIG. 3. FIG. 4 is a cross-sectional end view in the zz direction in a state where the lightweight tile shown in FIG. 3 is wound on a roof. It is a cross-sectional end surface schematic diagram of the AA direction of the lightweight roof tile shown in FIG. It is a partial expanded cross-section schematic diagram of an example of a porous body. It is a cross-sectional end view of the AA direction of the tile main body in the lightweight tile shown in FIG. FIG. 6 is a cross-sectional end view in a direction corresponding to the AA direction of the lightweight tile shown in FIG. 1 in still another embodiment of the lightweight tile of the present invention. FIG. 7 is a cross-sectional end view in a direction corresponding to the AA direction of the lightweight roof tile shown in FIG. 1 in still another embodiment of the lightweight roof tile of the present invention. FIG. 12A is a perspective view, and FIG. 12B is a cross-sectional end view in the BB direction of FIG. 12A. It is a cross-sectional schematic diagram of the lightweight roof tile of this invention with which the solar cell module was mounted | worn. It is an upper surface schematic diagram of the lightweight roof tile of this invention with which the solar cell module was mounted | worn. It is an upper surface schematic diagram of the lightweight roof tile of the other aspect of this invention with which the solar cell module was mounted | worn.

Explanation of symbols

2, 2a, 2b, 2c, 2d, 2 ′, 2 ″: Lightweight roof tile 4: Roof tile body 6, 66: Recessed portion 8: Air-containing pore body 12: Non-recessed portion 50: Solar cell module

Claims (15)

A light-weight roof tile in which a plurality of recessed portions are formed in a dish shape on the front surface of a non-permeable roof tile body, and the non-recessed portions surrounding the recessed portions have a mesh shape. The lightweight roof tile according to claim 1, wherein the non-recessed portion has a lattice shape in a top view. The lightweight roof tile of Claim 1 or 2 whose width | variety of the non-recessed part located inside the non-recessed part located in the peripheral part of a tile among the said non-recessed part is 10-40 mm. The lightweight roof tile of Claim 2 or 3 whose length of one side of the said depression part is 35-50 mm. The lightweight roof tile according to any one of claims 1 to 4, wherein a thickness of the depressed portion is 0.3 to 0.7 times a thickness of the non-depressed portion. The lightweight tile according to claim 5, wherein the material of the tile main body is the same as the material of the clay tile, and the width of the non-depressed portion located inside the non-depressed portion located at the periphery of the tile is 10 to 40 mm. The lightweight roof tile according to any one of claims 1 to 6, wherein an angle formed between a side wall surface of the eaves of the depressed portion and a tile surface continuous with the side wall surface is 200 to 225 degrees. The lightweight roof tile according to any one of claims 1 to 7, wherein the depressed portion is filled with a porous body. The lightweight roof tile in any one of Claim 1 to 7 with which the solar cell module provided with the sheet-like electric power generation layer in the said depression part was arrange | positioned. A lightweight roof tile in which a depressed portion is formed on the back surface of a non-permeable roof tile body, and the depressed portion is filled with a porous body. The non-depressed part surrounding the depressed part has a face-to-face mesh shape, and the depressed part is filled with a porous body, and is located inside the non-depressed part located at the periphery of the roof tile among the non-depressed parts The lightweight roof tile according to claim 10, wherein the width of the non-recessed portion is 10 to 40 mm. A method for producing a lightweight roof tile, comprising a step of firing a molding body made of a material used for clay roof tiles, wherein the molding body is formed with a plurality of recessed portions recessed on a single side. Manufacturing method. The non-depressed part surrounding the depressed part has a mesh shape, and the thickness of the depressed part is 0.3 to 0.7 times the thickness of the non-depressed part, and the non-depressed part is located at the periphery of the roof tile. The method for producing a lightweight roof tile according to claim 12, wherein a width of the non-recessed portion located inside the portion is 10 to 40 mm after firing. It is a manufacturing method of the lightweight roof tile in any one of Claims 8, 10, and 11,
A step of preparing a tile body in which a plurality of depressed portions depressed in a dish shape are formed on a part of one side;
Mixing a mixture containing a filler piece made of a porous material and a binder before curing to obtain a precursor of the porous body;
Filling the depressed portion with the precursor;
And a step of solidifying the filled precursor. It is a manufacturing method of the lightweight roof tile in any one of Claims 8, 10, and 11,
A step of preparing a roof tile body and a porous body formed with a plurality of recessed portions recessed in a dish shape on a part of one side;
A method of manufacturing a lightweight roof tile, comprising: loading the pore-containing body into the depressed portion.

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