Construction method for bearing wall, bearing panel and bearing wall

Abstract

To provide a construction method for a bearing wall that is light-weight and superior in on-site workability, and also exhibits superior strength characteristics as a structural member and has heat insulation characteristics and high energy-saving effect.SOLUTION: There is provided a construction method for a bearing wall such that a bearing panel 1 is formed by laminating a sheet material 20 on at least one surface of a synthetic resin foam panel 10 and then fixed to an outdoor-side surface of a framework material 30 of a wooden building with a pressure-sensitive adhesive or an adhesive 40.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a construction method for a lightweight bearing wall that provides earthquake resistance to a wooden building, a bearing panel, and a bearing wall. [Background technology]

[0002] Traditionally, one method of making wooden buildings earthquake-resistant is to use diagonal braces, which are inserted diagonally between the columns that make up the framework. However, not only do diagonal braces get in the way when filling the spaces between the columns with insulating material such as glass wool (filling insulation), but they also require highly accurate dimensions to ensure the frame has the required earthquake resistance, making their construction time-consuming.

[0003] Another method is to provide earthquake resistance to wooden buildings by arranging face panels made of structural plywood, particle board, wood-based board, cement board, gypsum board, volcanic glass laminate, etc., which have predetermined standard dimensions and have the strength or function of a load-bearing wall, so that they connect paired columns and paired cross members, and then fastening the face panels to the columns, cross members, studs, etc. with fasteners such as nails and screws to form a wall structure.

[0004] Patent Document 1 discloses a wooden frame shear wall structure in which thick structural plywood is directly attached to the exterior of the framed columns, bases, beams, girders, and crossbeams, and is then directly attached using iron nails. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-138474 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0006] However, in the case of face materials made of structural plywood, particle board, etc., or load-bearing panels using such structural plywood, steel plate, etc. as base materials, in order to ensure the strength of the wall structure to be constructed, the face materials or base materials of the structural plywood, particle board, or steel plate used must be thick, bulky, and heavy, making them difficult to transport and requiring heavy work to install, which is disadvantageous in terms of workability.The wall structure disclosed in Patent Document 1 also uses a base material made of flat plywood, so its lightness is insufficient and there is room for improvement.

[0007] The present invention has been made in consideration of the various problems inherent in the background art described above, and its object is to provide a construction method for a shear wall, a shear panel, and a shear wall that are lightweight, easy to construct on-site, and also exhibit excellent strength characteristics as a structural member. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a construction method for a bearing wall, a bearing panel, and a bearing wall as described in the following [1] to

[15] . [1] A method for constructing a load-bearing wall of a wooden building, characterized in that a sheet material is laminated and fixed to at least one side of a synthetic resin foam board to form a load-bearing panel, and the load-bearing panel is fixed to the exterior surface of the frame material of the wooden building with an adhesive or glue. [2] The construction method for a bearing wall according to [1] above, characterized in that the sheet material has a tensile load of 5N / 6mm or more when stretched by 0.1mm. [3] A construction method for a load-bearing wall according to either [1] or [2] above, characterized in that the sheet material is laminated and fixed to both sides of the synthetic resin foam board to form a load-bearing panel. [4] A construction method for a shear wall described in any one of [1] to [3] above, characterized in that after the load-bearing panel is fixed to the exterior surface of the frame member of a wooden building, a ventilated furring strip is placed on the exterior surface of the load-bearing panel at the location where the frame member is located by fixing the ventilated furring strip and the load-bearing panel with an adhesive or glue, and the ventilated furring strip and the load-bearing panel are fixed to the frame member by a fastening means that passes through the ventilated furring strip and the load-bearing panel. [5] A construction method for a load-bearing wall according to any one of [1] to [4] above, characterized in that the outdoor surface of the frame material and the load-bearing panel are fixed together with double-sided adhesive tape. [6] The method for constructing a bearing wall according to [5] above, characterized in that the double-sided adhesive tape has an adhesive layer made of an acrylic adhesive. [7] A construction method for a bearing wall according to any one of [1] to [6] above, characterized in that the sheet material is one or more types of sheet material selected from an inorganic fiber sheet, a thermoplastic resin sheet, an inorganic fiber-impregnated resin sheet, and waterproof paper. [8] A load-bearing panel used in the load-bearing walls of wooden buildings, characterized in that the load-bearing panel is a synthetic resin foam board with a sheet material laminated and fixed to at least one side thereof. [9] The load-bearing panel according to [8], wherein the sheet material has a tensile load of 5N / 6mm or more when stretched by 0.1mm.

[10] The load-bearing panel according to [8] or [9], characterized in that the sheet material is laminated and fixed to both sides of the synthetic resin foam board.

[11] The apparent density of the load-bearing panel is 100 kg / m 3 The load-bearing panel according to any one of the above [8] to

[10] , characterized in that:

[12] A load-bearing panel according to any one of [8] to

[11] above, characterized in that the thickness of the synthetic resin foam board is 20 mm or more and 100 mm or less, and the ratio of the total thickness (mm) of the sheet material to the thickness (mm) of the synthetic resin foam board is 0.003 to 0.05.

[13] The load-bearing panel according to any one of [8] to

[12] above, characterized in that the sheet material is one or more types of sheet material selected from an inorganic fiber sheet, a thermoplastic resin sheet, an inorganic fiber-impregnated resin sheet, and waterproof paper.

[14] A load-bearing wall of a wooden building using the load-bearing panel described in any one of [8] to

[13] above, characterized in that the load-bearing panel and the exterior surface of the framework of the wooden building are fixed with an adhesive or glue.

[15] The bearing wall according to

[14] , characterized in that the bearing wall has a wall ratio of 2.5 or more. [Effects of the Invention]

[0009] The above-described construction method for a bearing wall, the bearing panel, and the bearing wall according to the present invention are lightweight and have excellent workability on site, and also exhibit excellent strength characteristics as structural members. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a conceptual exploded perspective view showing one embodiment of a load-bearing panel according to the present invention. FIG. [Figure 2] 1 is a conceptual, partially cutaway, exploded perspective view showing one embodiment of a load-bearing wall construction method according to the present invention. [Figure 3] 1 is a conceptual, partially exploded perspective view showing one embodiment of a construction method for a bearing wall according to the present invention. [Figure 4] 1 is a conceptual exploded plan view showing one embodiment of a construction method for a bearing wall according to the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a bearing wall construction method, a bearing panel, and a bearing wall according to the present invention will be described in detail with reference to the drawings.

[0012] FIG. 1 is an exploded perspective view showing one embodiment of a bearing panel used in the bearing wall construction method of the present invention. The bearing panel 1 shown in FIG. 1 is formed by laminating and fixing sheet materials 20, 20 to both sides of a synthetic resin foam board 10. While it is preferable from the viewpoint of performance (wall ratio) as a bearing wall to have the sheet material 20 laminated and fixed to both sides of the synthetic resin foam board 10, as in the illustrated bearing panel 1 of the present invention, it is sufficient that the sheet material 20 is laminated and fixed to at least one side of the synthetic resin foam board 10. In this case, which side faces the indoor side (the frame member side) is not necessarily limited, but from the viewpoint of increasing the adhesive strength when the bearing panel is fixed to the outdoor side of the frame member, it is preferable that the side to which the sheet material 20 is laminated and fixed faces the indoor side.

[0013] Examples of the synthetic resin foam board 10 constituting the load-bearing panel 1 include a foam plate made of synthetic resin such as styrene-based resin, propylene-based resin, ethylene-based resin, vinyl chloride resin, vinylidene chloride resin, acrylic resin, polycarbonate-based resin, phenol-based resin, and rigid urethane-based resin. Examples of foam molding methods for the foam plate include extrusion foam molding and in-mold molding of foamed beads. Among these, an extruded foam board containing a polystyrene-based resin is preferably used as the synthetic resin foam board 10 constituting the load-bearing panel 1 according to the present invention, because it has high rigidity and is inexpensive even at a low density. In this case, the apparent density of the foam is 20 kg / m. 3 More than 50kg / m 3 It is preferable that the density is 25 kg / m or less. 3 More than 40kg / m 3 If the apparent density of the foam is within the above range, the resulting load-bearing panel will have high rigidity and excellent lightness. The synthetic resin foam board 10 is preferably a synthetic resin foam board that reduces in thickness by 10% or more after 50% compression, deformation, and pressure release. In order to provide a load-bearing panel with excellent rigidity, the synthetic resin foam board 10 has a compressive strength in the thickness direction of 5 N / cm. 2 It is preferable that the strength is 7N / cm or more. 2From the same viewpoint, it is more preferable that the bending strength is 7 N / cm or more. 2 It is preferable that the resistance is 10N / cm or more. 2 It is more preferable that the apparent density of the synthetic resin foam board is equal to or greater than 100%. The apparent density of the synthetic resin foam board is calculated by dividing the weight of the foam board by the volume of the foam board. The thickness loss after 50% compression, deformation, and pressure release of the synthetic resin foam board, the compressive strength, and the flexural strength can be measured in accordance with JIS A9521:2022.

[0014] The synthetic resin foam board 10 is preferably an extruded foam board containing a polystyrene-based resin. The polystyrene-based resin is a polymer primarily composed of styrene, and can be not only a styrene homopolymer but also a copolymer of styrene and a vinyl monomer copolymerizable with styrene. Specific examples include general-purpose polystyrene (GPPS), styrene-acrylonitrile copolymer, styrene-acrylic acid copolymer, styrene-methacrylic acid copolymer, styrene-methyl methacrylate copolymer, styrene-ethyl methacrylate copolymer, styrene-methyl acrylate copolymer, styrene-ethyl acrylate copolymer, and styrene-maleic anhydride copolymer. These polystyrene-based resins may be used alone or in combination of two or more. The polystyrene-based resin may also contain polyfunctional monomer unit components such as divinylbenzene and hyperbranched macromonomers.

[0015] The extruded foam board containing the polystyrene resin may contain a resin material other than the polystyrene resin. The resin material other than the polystyrene resin includes those generally referred to as resins or elastomers. Examples of resin materials other than the polystyrene resin include thermoplastic resins such as polyethylene resins (at least one selected from ethylene homopolymers and ethylene copolymers having an ethylene unit content of 50 mol% or more), polypropylene resins (at least one selected from propylene homopolymers and propylene copolymers having a propylene unit content of 50 mol% or more), polyethylene terephthalate resins, polyphenylene ether resins, and polymethyl methacrylate, as well as thermoplastic elastomers such as styrene-butadiene-styrene block copolymers, styrene-isoprene-styrene block copolymers, hydrogenated styrene-butadiene-styrene block copolymers, hydrogenated styrene-isoprene-styrene block copolymers, and styrene-ethylene copolymers. The polyethylene terephthalate resin is preferably amorphous polyethylene terephthalate resin due to its excellent heat insulating properties. The amorphous polyethylene terephthalate resin means a polyethylene terephthalate resin having a heat of fusion of less than 5 J / g (including 0) based on JIS K7122 (1987).

[0016] From the viewpoints of rigidity, heat insulating properties, and light weight, the thickness of the synthetic resin foam board 10 is preferably 15 mm to 200 mm, more preferably 20 mm to 100 mm, and even more preferably 25 mm to 80 mm. From the viewpoint of ease of handling as a building material, the longitudinal length of the synthetic resin foam board 10 is preferably 100 cm to 400 cm, more preferably 150 cm to 370 cm, and even more preferably 200 cm to 350 cm. From the same viewpoint, the lateral length of the synthetic resin foam board 10 is preferably 50 cm to 120 cm, and more preferably 70 cm to 100 cm.

[0017] The sheet material 20 laminated and fixed to at least one surface of the synthetic resin foam board 10 may be a sheet-like material based on resin or fiber, with a thickness of approximately 0.01 mm to 5 mm. When the thickness of the sheet material 20 is equal to or greater than the lower limit, a load-bearing panel with excellent rigidity and sufficient strength is easily obtained. On the other hand, when the thickness is equal to or less than the upper limit, excessive increases in thickness and weight due to bonding to the synthetic foam board 10 can be suppressed, making it easier to obtain a load-bearing panel suitable for the intended purpose of providing a lightweight building material with good workability. Examples of the sheet-like material based on resin include resin sheets commonly used as surface materials, and the resin sheets of the present invention also include resin films. Examples of the sheet-like material based on the above-mentioned fibers include paper such as tissue paper, kraft paper, fine paper, Japanese paper, titanium paper, linter paper, parchment paper, paraffin paper, parchment paper, glassine paper, backing paper for wallpaper, base paper for paperboard and gypsum board, and woven or nonwoven fabrics made of fibers such as polyester resin fiber, acrylic resin fiber, aramid fiber, glass fiber, carbon fiber, etc. More specifically, the sheet material is preferably one or more types selected from inorganic fiber sheets, thermoplastic resin sheets, inorganic fiber-impregnated resin sheets, and waterproof paper.

[0018] Examples of inorganic fiber sheets used as the sheet material 20 laminated and fixed to at least one surface of the synthetic resin foam board 10 include glass fiber, carbon fiber, basalt fiber, alumina fiber, and silicon-containing ceramic fiber. Among these, glass fiber sheets are preferred. Furthermore, inorganic cloth, which is a woven fabric of inorganic fibers, is preferred as the inorganic fiber sheet, and glass cloth, which is a woven fabric of glass fibers, is particularly preferred.

[0019] Examples of thermoplastic resin sheets that can be used as the sheet material 20 include polyamide-based resins such as polyamide 6, polyamide 12, polyamide 66, and polyamide 46; polyester-based resins such as polyethylene terephthalate and polybutylene terephthalate; polyolefin-based resins such as polyethylene and polypropylene; and polystyrene-based resins such as general-purpose polystyrene (GPPS) and high impact polystyrene (HIPS). High impact polystyrene (HIPS) is a rubber-modified polystyrene containing a rubber component. Such rubber-modified polystyrene is typically obtained by polymerizing styrene in the presence of rubber-like polymer particles such as polybutadiene. The rubber content of the high impact polystyrene is preferably 2 to 15% by mass. Among these, polyamide-based resin sheets such as polyamide 6 and polyamide 66, which have excellent abrasion resistance, and polyester-based resin sheets such as polyethylene terephthalate, which have excellent heat resistance and mechanical strength, are preferably used. The thermoplastic resin sheet is preferably a stretched thermoplastic resin sheet from the viewpoint of improving tensile strength, and more preferably a stretched polyamide-based resin sheet from the viewpoint of improving tensile strength. When the above-mentioned thermoplastic resin sheet is used, its thickness is preferably 0.01 mm or more and 3 mm or less, more preferably 0.02 mm or more and 2 mm or less, even more preferably 0.05 mm or more and 1 mm or less, even more preferably 0.06 mm or more and 0.8 mm or less, and particularly preferably 0.08 mm or more and 0.5 mm or less.

[0020] Furthermore, the inorganic fiber-impregnated resin sheet used as the sheet material 20 is obtained by impregnating the inorganic fibers with a resin. Examples of resins impregnated into the inorganic fibers include polyolefin resins such as polypropylene and polyethylene, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyamide resin, polystyrene resin, acrylic resin, polyarylate resin, polycarbonate resin, polyarylene sulfone resin, polylactic acid, polybutylene succinate, silicone resin, melamine resin, phenolic resin, epoxy resin, and polyimide resin. Furthermore, examples of inorganic fibers include glass fiber, carbon fiber, basalt fiber, aramid fiber, alumina fiber, and silicon-containing ceramic fiber, as described above, with glass cloth being particularly preferred. Among glass cloths, particularly preferred is a long glass fiber cloth formed by weaving long glass fibers having a single fiber diameter of 6 to 11 μm, with a warp / weft yarn density of 20 / 25 mm or more and a difference in warp / weft yarn density of 10 / 25 mm or less. From the viewpoint of impregnation processability, a glass cloth resin-impregnated sheet obtained by impregnating a glass cloth with a thermoplastic resin is preferred. Among these, from the viewpoint of impregnation processability for inorganic fibers and excellent mechanical properties, a glass cloth resin-impregnated sheet obtained by impregnating a glass cloth with an acrylic resin is particularly preferred. When the inorganic fiber sheet or inorganic fiber-impregnated resin sheet is used, its thickness is preferably 0.02 mm to 3 mm, more preferably 0.05 mm to 2 mm, even more preferably 0.1 mm to 1.5 mm, even more preferably 0.2 mm to 1 mm, and particularly preferably 0.25 mm to 0.6 mm.

[0021] The waterproof paper used as the sheet material 20 is made by coating paper with a resin. Methods for coating paper with a resin include coating, impregnation by immersing paper in resin, and lamination by thermocompression bonding a resin film to paper. Examples of resins that can be used for coating include thermosetting resins such as silane-based resins, melamine-based resins, urethane-based resins, isocyanate-based resins, and phenol-based resins, and thermoplastic resins such as acrylic resins, polyester-based resins, polyethylene resins, and polypropylene resins. From the viewpoint of excellent moisture permeability, the resin is preferably a polyolefin resin such as one or more polyethylenes selected from low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and high-density polyethylene (HDPE), or polypropylene, with low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE) being more preferred. The paper is manufactured by agglutinating plant fibers and other fibers, and any of the above-mentioned papers can be used for the paper sheet. Kraft paper is preferred among these because of its excellent tensile strength. The kraft paper can be one or more types selected from kraft paper type 1, kraft paper type 2, kraft paper type 3, kraft paper type 4, kraft paper type 5 No. 1, and kraft paper type 5 No. 2 as described in JIS P3401:2000. As the waterproof paper, kraft paper laminated with a resin layer on at least one side is preferred from the viewpoints of excellent tensile strength and water resistance and low cost. When using the waterproof paper, its thickness is preferably 0.01 mm to 3 mm, more preferably 0.02 mm to 2 mm, even more preferably 0.05 mm to 1 mm, even more preferably 0.06 mm to 0.8 mm, and particularly preferably 0.08 mm to 0.5 mm.

[0022] The thickness of the sheet material 20 can be measured by taking the arithmetic mean value of measurements made with a micrometer at five or more randomly selected points on the sheet material 20. When the sheet material 20 is made of woven fabric, the thickness can be determined by measuring the intersections of the warp and weft threads.

[0023] The sheet material 20 has a basis weight (grammage) of 100 g / m 2 It is preferable that the weight is 200 g / m or more. 2 More preferably, it is 300 g / m or more. 2 It is more preferable that the basis weight (grammage) is equal to or greater than the above-mentioned lower limit. When the basis weight (grammage) is equal to or greater than the above-mentioned lower limit, a load-bearing panel having excellent rigidity and sufficient strength is easily obtained. On the other hand, from the viewpoint of lightness, the basis weight (grammage) of the sheet material 20 is preferably 500 g / m or more. 2 It is preferable that the weight per unit area (basis weight) of the sheet material is equal to or less than 10 ...

[0024] Furthermore, the sheet material 20 preferably has a tensile modulus of 1000 MPa or more. If the tensile modulus is equal to or greater than the lower limit, the rigidity is excellent, and the resulting load-bearing panel also has excellent rigidity and strength. From this perspective, the tensile modulus of the sheet material 20 is more preferably 1700 MPa or more, and particularly preferably 2000 MPa or more. On the other hand, the upper limit of the tensile modulus of the sheet material 20 is not particularly limited, but considering ease of manufacture, it is preferably 30000 MPa or less. The tensile modulus of the sheet material 20 can be calculated based on JIS K7127:1999 by using test specimen type 5, preparing two types of test specimens parallel and perpendicular to the orientation direction of the sheet material 20, and one test specimen at an angle of 17.9° to the direction parallel to the orientation direction, and measuring at a tension speed of 50 mm / min in accordance with the "slope obtained from two points" in JIS K7161-1:2024 "tensile modulus." Of the three types of test specimens, it is preferable that two types of test specimens, one parallel to the orientation direction of the sheet material 20 and one perpendicular thereto, satisfy the above-mentioned range of tensile modulus, and it is more preferable that all three types of test specimens satisfy the above-mentioned range of tensile modulus. If the sheet material 20 does not have anisotropy, measurement is performed with the longitudinal direction of the sheet material 20 as the orientation direction. The reason for measuring the tensile modulus of the test specimen at an angle of 17.9° with respect to the direction parallel to the orientation direction is that this is the diagonal direction of the load-bearing panel in wall magnification measurement, and 17.9° is the angle at which the greatest tensile force is generated when the load-bearing panel is shear-deformed.

[0025] The sheet material 20 preferably has a tensile load of 5 N / 6 mm or more when stretched 0.1 mm. A tensile load equal to or greater than the lower limit provides excellent rigidity, resulting in a load-bearing panel with excellent rigidity and strength. From this perspective, the tensile load of the sheet material 20 when stretched 0.1 mm is more preferably 10 N / 6 mm or more, even more preferably 20 N / 6 mm or more, and even more preferably 30 N / 6 mm or more. Meanwhile, the upper limit of the tensile load of the sheet material 20 when stretched 0.1 mm is preferably 500 N / 6 mm or less, from the viewpoint of more effectively preventing cracking and chipping of the sheet material when stress is generated due to shaking such as an earthquake. Furthermore, the sheet material 20 preferably has a maximum displacement of 0.2 mm or more when measured with a tensile load, from the viewpoint of more effectively preventing cracking and chipping of the sheet material when stress is generated due to shaking such as an earthquake. The tensile load of the sheet material 20 when stretched 0.1 mm can be determined based on JIS K7127:1999 by using a type 5 test piece (narrow parallel section width 6 mm, gauge length 25 mm) and preparing two types of test pieces, one parallel to the orientation direction of the sheet material and one perpendicular to it, and measuring the tensile load when stretched 0.1 mm using, for example, an autograph EZ-XL manufactured by Shimadzu Corporation, and then calculating the arithmetic average value.

[0026] The load-bearing panel 1 is formed by laminating and fixing the sheet material 20 to at least one surface of the synthetic resin foam board 10. When forming the load-bearing panel 1, the synthetic resin foam board 10 and the sheet material 20 are laminated and fixed together, and when two or more types of sheet materials are selected, the sheet materials 20, 20 are laminated and fixed together, and the laminated and fixed sheet material 20 is laminated and fixed to the synthetic resin foam board 10. Fixation by adhesion or bonding is preferable. Specifically, the sheet material 20 and the synthetic resin foam board 10 can be bonded by interposing a resin film between the sheet material 20 and the synthetic resin foam board 10 and melting the resin film with heat, or by using an adhesive. Examples of resin films used for lamination and fixation include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE), polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, high-impact polystyrene (HIPS), polyvinyl acetate resin, and poly(meth)acrylic resin. Examples of adhesives include silicone adhesives, acrylic adhesives, epoxy adhesives, rubber adhesives, urethane adhesives, and polyethylene-, polyamide-, and ethylene-vinyl acetate-based hot-melt adhesives. Among these, ethylene-vinyl acetate (EVA)-based hot-melt adhesives are preferred. When laminating and fixing the sheet material 20 to at least one surface of the synthetic resin foam board 10, if the sheet material 20 has anisotropy, it is preferable to laminate and fix the sheet material 20 so that its orientation is aligned with the longitudinal direction of the load-bearing panel. The area ratio of the laminated and fixed sheet materials 20, 20 to each other and the laminated and fixed sheet materials 20 to the synthetic resin foam board 10 is preferably 50% or more, more preferably 70% or more, even more preferably 90% or more, even more preferably 95% or more, and particularly preferably almost the entire surface (more than 98%). By being laminated and fixed in this way, the sheet material 20 and the synthetic resin foam board 10 are integrated, and a strength as a load-bearing wall panel that is not available from each material alone is exhibited.

[0027] As described above, the load-bearing panel 1 according to the present invention is formed by laminating and fixing the sheet material 20 to at least one surface of the synthetic resin foam board 10. From the viewpoint of lightness, the apparent density of the panel is 150 kg / m 3 It is preferable that the saturation is 100 kg / m or less. 3 More preferably, it is 80 kg / m or less. 3 It is more preferable that the ratio is equal to or less than 0.003. From the same viewpoint, the ratio of the total thickness (mm) of the sheet material 20 constituting the load-bearing panel 1 to the thickness (mm) of the synthetic resin foam board 10 constituting the load-bearing panel 1 is preferably 0.003 to 0.05, more preferably 0.005 to 0.04, and even more preferably 0.01 to 0.03. The apparent density of the load-bearing panel 1 is calculated by dividing the weight of the load-bearing panel by the volume calculated based on its dimensions.

[0028] Furthermore, the load-bearing panel 1 according to the present invention, formed by laminating and fixing a sheet material 20 to at least one surface of a synthetic resin foam board 10, preferably has a tensile modulus of 25 MPa or more, more preferably 50 MPa or more, and even more preferably 100 MPa or more. This is because a tensile modulus equal to or greater than the lower limit of the tensile modulus provides excellent rigidity and strength. On the other hand, the upper limit of the tensile modulus is preferably approximately 1000 MPa or less. The tensile modulus of the load-bearing panel 1 can be calculated by preparing a test piece in the shape of Type 5 of JIS K7127:1999, with two test pieces parallel to the longitudinal direction of the load-bearing panel and one at an angle of 17.9° to the direction parallel to the longitudinal direction, in accordance with the "slope determined from two points" in JIS K7161-1:2024 for "tensile modulus," at a tension speed of 10 mm / min until the synthetic resin foam board 10 breaks. Of the two types of test specimens, it is preferable that at least one of them satisfy the tensile modulus range, and it is more preferable that both types of test specimens satisfy the tensile modulus range. Regarding the test specimens at an angle of 17.9° with respect to the direction parallel to the longitudinal direction, two test specimens are prepared: one at an angle of 17.9° to the right of the direction parallel to the longitudinal direction and one at an angle of 17.9° to the left of the direction parallel to the longitudinal direction. The tensile modulus of each test specimen is measured, and the arithmetic average value is used. The reason for measuring the tensile modulus of the test specimens at an angle of 17.9° with respect to the direction parallel to the longitudinal direction is that 17.9° is the diagonal direction of the load-bearing panel in wall magnification measurement, and the angle at which the greatest tensile force is generated when the load-bearing panel is shear-deformed is 17.9°.

[0029] As shown in Figure 2, the above-mentioned load-bearing panels 1 are fixed to the exterior surfaces of the frame members 30 of a wooden building, specifically the columns 31, studs 32, and cross members 33, with pressure-sensitive adhesive or adhesive 40 to construct a load-bearing wall 50. Adjacent load-bearing panels 1, 1 are placed on the exterior surfaces of the frame members 30 with their sides in close contact. The load-bearing wall 50 of the present invention constructed in this manner has the load-bearing panels 1 directly fixed to the exterior surfaces of the frame members 30 of the wooden building with pressure-sensitive adhesive or adhesive 40 so as to be integrated with each other. Therefore, the load-bearing panels 1 effectively reinforce the frame members 30, thereby enhancing the earthquake resistance of the wooden building. This makes it possible to construct a load-bearing wall 50 with a wall coefficient (see Tables 3 and 4) equal to or greater than that achieved when using high-strength face materials such as conventional structural plywood or particle board. As a method of fixing using the pressure-sensitive adhesive or adhesive 40, the pressure-sensitive adhesive or adhesive 40 may be applied to the load-bearing panel 1 and then fixed to the frame members 30 of the wooden building, or the pressure-sensitive adhesive or adhesive 40 may be applied to the exterior surface of the frame members 30 of the wooden building and then the load-bearing panel 1 may be fixed. From the viewpoint of ease of construction, it is preferable to apply the pressure-sensitive adhesive or adhesive 40 to the load-bearing panel 1 and then fix it to the frame members 30 of the wooden building.

[0030] The adhesive used to secure the load-bearing panel 1 to the exterior surface of the framework 30 of a wooden building can be, for example, an acrylic, rubber, urethane, or silicone adhesive. Acrylic adhesives are preferred because of their excellent durability, suitability for outdoor use, and high adhesiveness. Examples of adhesives include thermoplastic resins such as vinyl acetate resins, polyvinyl alcohol, polyvinyl acetal, ethylene-vinyl acetate resins, vinyl chloride resins, acrylic resins, and polyamides; thermosetting resins such as urea resins, melamine resins, phenolic resins, resorcinol resins, epoxy resins, polyester resins, urethane resins, polyimides, and polybenzimidazoles; and elastomers such as chloroprene rubber, nitrile rubber, styrene-butadiene rubber, polysulfide, butyl rubber, silicone, acrylic rubber, and urethane rubber. Furthermore, when an adhesive is used, the adhesive alone may be interposed between the load-bearing panel 1 of the present invention and the frame member 30, or it may be interposed between the load-bearing panel 1 and the frame member 30 in the form of double-sided adhesive tape, which is preferable as it improves workability. The adhesive used to secure the load-bearing panel 1 to the exterior surface of the frame member 30 of a wooden building can be the same adhesive as the adhesive used to secure the synthetic resin foam board 10 and the sheet material 20 described above.

[0031] When using double-sided adhesive tape to secure the load-bearing panel 1 to the exterior surface of the frame 30 of a wooden building, it is preferable to use an ultra-high-strength double-sided adhesive tape that meets the requirements of JIS Z1541:2009, Class 1, No. 1. In the present invention, a method for identifying a double-sided adhesive tape suitable for securing the load-bearing panel 1 to the exterior surface of the frame 30 of a wooden building to form a load-bearing wall of the wooden building can be, for example, by measuring the 90° peel adhesive strength of the double-sided adhesive tape in accordance with JIS Z0237:2022. Specifically, the double-sided adhesive tape is adhered to cedar wood, and then peeled from the cedar wood and subjected to a 90° peel test at a tensile speed of 10 mm / min. The 90° peel adhesive strength of the double-sided adhesive tape is preferably 5 N / 25 mm or greater, more preferably 7 N / 25 mm or greater, and even more preferably 10 N / 25 mm or greater. If the double-sided adhesive tape has a 90° peel adhesive strength equal to or greater than the above-mentioned lower limit, it becomes easier to firmly fix the load-bearing panel 1 integrally to the frame members 30 of a wooden building, making it easier to construct a load-bearing wall 50 with sufficient earthquake resistance.

[0032] The double-sided adhesive tape used may be a double-sided adhesive tape consisting of only an adhesive layer, or may be a double-sided adhesive tape having a substrate and adhesive layers on both sides of the substrate. In the case of a double-sided adhesive tape having a substrate, the substrate is preferably a resin such as polyester resin, polypropylene resin, polyethylene resin, or acrylic resin, or a nonwoven fabric. The form of the substrate is not particularly limited and may be a nonwoven fabric, film, or foam. However, considering the conformability of the adhesive layer to the bonding surface, a nonwoven fabric or foam is preferred. The thickness of the double-sided adhesive tape is not particularly limited, but is preferably 0.05 to 1 mm, more preferably 0.1 to 0.8 mm, and even more preferably 0.3 to 0.6 mm. Specific examples of double-sided adhesive tapes having the above-mentioned properties, such as 90° peel adhesive strength, include Hyperjoint H8004, H9004, and TW-Y01 manufactured by Nitto Denko Corporation, and 3M VHB Tape 5604A-GP and 3M Acrylic Foam Structural Bonding Tape Y-4180-04 manufactured by 3M Japan Ltd.

[0033] When the load-bearing panel 1 is fixed to the exterior surface of the framework 30 of a wooden building, the area where the load-bearing panel 1 and the exterior surface of the framework 30 of the wooden building are directly fixed with the adhesive or adhesive 40 is 400 cm 2 More than 7000cm 2 Preferably, it is less than 1000 cm 2 More than 5000cm 2 Furthermore, the ratio of the area where the load-bearing panel 1 and the outdoor surface of the frame 30 of the wooden building section are directly fixed with the pressure-sensitive adhesive or adhesive 40 to the area of ​​the load-bearing panel 1 is preferably 0.01 or more and 0.3 or less, more preferably 0.03 or more and 0.25 or less, and even more preferably 0.04 or more and 0.23 or less.

[0034] As described above, the construction method for a shear wall according to the present invention involves first fixing a shear panel 1 to the exterior surface of a frame member 30 of a wooden building with adhesive or glue 40, and then, as shown in Figures 3 and 4, placing a ventilated furring strip 60 on the exterior surface of the shear panel 1 where the frame member 30 is located by fixing the ventilated furring strip 60 to the shear panel 1 with adhesive or glue 70. Then, fastening means 80 that passes through the ventilated furring strip 60 and the shear panel 1 secures the ventilated furring strip 60, the shear panel 1, and the frame member 30. While it is not necessary to fix the ventilated furring strip 60 to the exterior surface of the shear panel 1 with adhesive or glue 70, as in the embodiment shown in Figures 3 and 4, fixing the ventilated furring strip 60 to the exterior surface of the shear panel 1 with adhesive or glue 70 is preferred because it allows for the construction of a shear wall 50 with greater rigidity. When the ventilated furring strip 60 and the outdoor surface of the load-bearing panel 1 are fixed with an adhesive or glue 70, the area of ​​the adhesive or glue 70 fixing the ventilated furring strip 60 and the outdoor surface of the load-bearing panel 1 is preferably 80% or more of the ventilated furring strip 60, more preferably 90% or more, even more preferably 95% or more, and particularly preferably almost the entire surface (more than 98%).

[0035] The adhesive or bonding agent 70 used to secure the ventilated furring strip 60 to the exterior surface of the load-bearing panel 1 can be the same as the adhesive or bonding agent 40 used to secure the load-bearing panel 1 to the exterior surface of the frame and framework 30 of a wooden building. Using the adhesive in the form of double-sided adhesive tape is also preferable from the viewpoint of ease of installation. When using double-sided adhesive tape, the 90° peel adhesive strength described above is preferably 5 N / 25 mm or greater, more preferably 7 N / 25 mm or greater, and even more preferably 10 N / 25 mm or greater. The fastening means 80 used to insert the ventilated furring strip 60 and load-bearing panel 1 and secure the ventilated furring strip 60 and load-bearing panel 1 to the frame and framework 30 can be fasteners such as nails, wood screws, or screws. Wood screws are preferred because they are less likely to come loose.

[0036] A wall structure is constructed by attaching exterior materials (not shown) to the outdoor side of the ventilation furring strip 60 while maintaining an air passage. As the exterior materials, commercially available exterior panels such as metal, ceramic, or wood siding that meets fire resistance standards for exterior walls, or ALC (lightweight aerated concrete) panels are preferably used, but the present invention is not limited to these.

[0037] The construction method for shear walls according to the present invention described above uses a shear panel 1 in which one or more sheet materials 20 selected from inorganic fiber sheets, thermoplastic resin sheets, inorganic fiber-impregnated resin sheets, waterproof paper, etc. are laminated and fixed to at least one side of a synthetic resin foam board 10. Therefore, compared to conventional facing materials made of structural plywood or particle board, or composite insulation panels using such structural plywood, steel plate, etc. as a base material and with an insulating layer disposed on the base material, the construction method is lighter and easier to transport and install, resulting in excellent construction properties.

[0038] Furthermore, a load-bearing wall 50 is constructed by fixing a load-bearing panel 1, which has a sheet material 20 laminated and fixed to at least one side of a synthetic resin foam board 10, to the outdoor surface of the frame material 30 of a wooden building with an adhesive or glue 40.Therefore, a load-bearing wall 50 can be constructed in which the load-bearing panel 1 and the frame material 30 of the wooden building are directly fixed together, which makes it possible to impart earthquake resistance to the wooden building while also forming an insulating layer (exterior insulation).

[0039] Furthermore, by placing additional insulation material such as glass wool between the columns, which are the frame members 30 (filled insulation), it is possible to further improve the insulation (additional insulation = exterior insulation + filled insulation), or by using conventional bracing in combination, it is possible to significantly improve earthquake resistance.

[0040] The above describes embodiments of the construction method for a shear wall, the shear panel, and the shear wall according to the present invention. However, the present invention is not limited to the above-described embodiments, and it is natural that various modifications and changes are possible within the scope of the present invention as the technical concept set forth in the claims. [Example]

[0041] <Materials used> -Synthetic resin foam board- JSP Corporation, extruded polystyrene resin foam board: Miraform Lambda (hereinafter "MFΛ50"), density: 35 kg / m 3 , Thickness: 50mm, Length: 2673mm, Width: 910mm, Compression strength: 15N / cm 2 , Bending strength: 31N / cm 2 〕 JSP Corporation, polystyrene resin extruded foam board: Miraform Lambda (hereinafter "MFΛ25"), density: 35 kg / m 3 , Thickness: 25mm, Length: 2673mm, Width: 910mm, Compression strength: 13N / cm 2 , Bending strength: 31N / cm 2 〕 JSP Corporation, polystyrene resin extruded foam board: Miraform MKS (hereinafter referred to as "MF50"), density: 35 kg / m3 , Thickness: 50mm, Length: 2673mm, Width: 910mm, Compression strength: 31N / cm 2 , Bending strength: 42N / cm 2 〕

[0042] -Sheet material- Unitika Ltd., long glass fiber cloth-impregnated acrylic resin sheet: H350MJ (hereinafter "glass fiber cloth-impregnated"; glass fiber cloth-impregnated resin sheet made by impregnating long glass fiber cloth (long glass fiber with a single fiber diameter of 9 μm, warp density of 33 / 25 mm, weft density of 30 / 25 mm, plain weave with a difference in warp and weft density of 3 / 25 mm) with acrylic resin, thickness: 0.3 mm, basis weight: 375 g / m 2 Tensile modulus (orientation direction): 10,000 MPa, Tensile modulus (direction perpendicular to orientation): 5,300 MPa, Tensile modulus (angle at 17.9° relative to orientation): 5,000 MPa, Tensile load at 0.1 mm elongation: 44.8 N / 6 mm, Maximum displacement: 0.9 mm - Unitika Ltd., long glass fiber cloth-impregnated acrylic resin sheet: H201MC (hereinafter referred to as "low basis weight glass cloth"; glass fiber cloth-impregnated resin sheet made by impregnating long glass fiber cloth (long glass fiber with a single fiber diameter of 9 μm, warp density of 42 threads / 25 mm, weft density of 31 threads / 25 mm, warp and weft density difference of 9 threads / 25 mm, plain weave) with acrylic resin, thickness: 0.18 mm, basis weight: 208 g / m 2 Tensile modulus (orientation direction): 6300 MPa, Tensile modulus (direction perpendicular to orientation): 8400 MPa, Tensile modulus (angle at 17.9° to orientation): 900 MPa, Tensile load at 0.1 mm elongation: 13.3 N / 6 mm, Maximum displacement: 0.4 mm Toyobo Co., Ltd., a multi-layer polyamide resin sheet (hereinafter referred to as "T Nylon"), thickness: 0.1 mm, basis weight: 135 g / m², consisting of a polyamide resin sheet N1102 (biaxially oriented polyamide resin sheet, thickness 25 μm) laminated with three layers of N1102 (biaxially oriented polyamide resin sheet, thickness 25 μm). 2Tensile modulus (orientation direction): 3500 MPa, Tensile modulus (direction perpendicular to orientation): 2900 MPa, Tensile modulus (angle at 17.9° to orientation): 4800 MPa, Tensile load at 0.1 mm elongation: 0.8 N / 6 mm, Maximum displacement: 8.7 mm A multi-layer polyamide resin sheet (hereinafter referred to as "Y nylon") manufactured by Unitika Ltd., consisting of a polyamide resin sheet: ON25 (biaxially oriented polyamide resin sheet, thickness 25 μm) laminated with three layers of ONBC25 (biaxially oriented polyamide resin sheet, thickness 25 μm) [thickness: 0.08 mm, basis weight: 115 g / m 2 Tensile modulus (orientation direction): 3500 MPa, Tensile modulus (direction perpendicular to orientation): 2200 MPa, Tensile modulus (angle at 17.9° to orientation): 3300 MPa, Tensile load at 0.1 mm elongation: 1.2 N / 6 mm, Maximum displacement: 11.6 mm Mitsubishi Chemical Corporation, polyamide resin sheet: Diamilon CZ (hereinafter referred to as "M Nylon", unstretched polyamide resin sheet, thickness: 0.1 mm, basis weight: 110 g / m) 2 , Tensile modulus (orientation direction): 600 MPa, Tensile modulus (direction perpendicular to orientation): 600 MPa, Tensile modulus (angle at 17.9° to orientation): 600 MPa, Tensile load at 0.1 mm elongation: 1.3 N / 6 mm, Maximum displacement: 61.8 mm Kraft paper with a resin layer laminated on one side, manufactured by Showa Pax Co., Ltd.: Base paper for heavy-duty packaging (kraft) paper bags (hereinafter referred to as "waterproof kraft paper", Kraft 75 (waterproof kraft paper 75g / m 2 ) and a polyethylene resin sheet (thickness 15 μm) laminated on waterproof kraft paper, thickness: 0.15 mm, basis weight: 90 g / m 2 Tensile modulus (orientation direction): 6600 MPa, Tensile modulus (direction perpendicular to orientation direction): 2800 MPa, Tensile modulus (angle at 17.9° to orientation direction): 2800 MPa, Tensile load at 0.1 mm elongation: 8.3 N / 6 mm, Maximum displacement: 1.0 mm Toyobo Co., Ltd., stretched polyethylene terephthalate resin sheet: E5100 (hereinafter referred to as "PET"), thickness: 0.03 mm, basis weight: 35 g / m2 Tensile modulus (direction of orientation): 6100 MPa, Tensile modulus (direction perpendicular to direction of orientation): 5900 MPa, Tensile modulus (angle at 17.9° to direction of orientation): 2800 MPa, Tensile load at 0.1 mm elongation: 0.5 N / 6 mm, Maximum displacement: 8.5 mm

[0043] -Thickness of sheet material- The thickness of each sheet material was determined by measuring five randomly selected points on the sheet material using a micrometer and calculating the arithmetic mean value. When the sheet material was made of woven fabric, the thickness was measured at the intersection of the warp and weft threads.

[0044] - Tensile modulus of sheet material - The tensile modulus of each of the above-mentioned sheet materials was calculated based on JIS K7127:1999 by using type 5 test pieces. Two types of test pieces, one parallel to the orientation direction of the sheet material and one perpendicular to it, and one at an angle of 17.9° to the direction parallel to the orientation direction, were prepared. The measurements were made at a tension speed of 50 mm / min in accordance with the "slope determined from two points" in JIS K7161-1:2024 for "tensile modulus." The measurement device used was an Autograph EZ-XL manufactured by Shimadzu Corporation. The above measurement was performed on 10 test pieces, and the arithmetic average value was used. For the test pieces with an angle of 17.9° with respect to the direction parallel to the orientation direction, two test pieces were prepared: one with an angle of 17.9° to the right with respect to the direction parallel to the orientation direction, and another with an angle of 17.9° to the left with respect to the direction parallel to the orientation direction. The tensile modulus of each was measured, and the arithmetic average value was used.

[0045] -Tensile load when sheet material is stretched 0.1 mm- The tensile load at 0.1 mm extension of each of the above-mentioned sheet materials was measured using a type 5 test piece (narrow parallel section width 6 mm, gauge length 25 mm) based on JIS K7127:1999. Two types of test pieces were prepared, one parallel to the orientation direction of the sheet material and one perpendicular to it. The thickness of the test piece was the same as that of the sheet material. The tensile load of the above test pieces was measured at 0.1 mm elongation using an autograph EZ-XL manufactured by Shimadzu Corporation. The above measurements were performed on five test pieces for each of two types, parallel to the orientation direction of the sheet material and perpendicular to it, and the arithmetic mean value was used. Note that if the above sheet material does not have anisotropy, the longitudinal direction of the sheet material was used as the orientation direction for the measurements.

[0046] - Adhesive for synthetic resin foam board and sheet material - Asahi Chemical Synthetic Co., Ltd., ethylene vinyl acetate hot melt adhesive: Asahi Melt M2500 (hereafter referred to as "EVA", softening point: 107°C) ALBON, a two-component epoxy adhesive manufactured by Alps Chemical Industries Co., Ltd. (hereinafter referred to as "epoxy", E-480:EH-480 = 1:1) High impact polystyrene (HIPS) resin film (hereinafter referred to as "PS", thickness: 30 μm)

[0047] - Adhesive between load-bearing panels and frame materials (ventilated furring strips) - Nitto Denko Corporation, double-sided adhesive tape: Hyper Joint H8004 (hereinafter referred to as "H8004", acrylic foam (single layer), adhesive thickness: 0.4 mm, 90° peel strength: 11.8 N / 25 mm) Nitto Denko Corporation, double-sided adhesive tape: TW-Y01 (hereinafter referred to as "TW-Y01"), substrate: nonwoven fabric, adhesive layer: acrylic adhesive, adhesive thickness: 0.1 mm, 90° peel strength: 12.7 N / 25 mm) 3M Japan Co., Ltd., double-sided adhesive tape: 3M Acrylic Foam Structural Bonding Tape Y4180-04 (hereinafter referred to as "Y4180-04", base material: acrylic foam, adhesive layer: acrylic adhesive, adhesive thickness: 0.4 mm, 90° peel strength: 11.9 N / 25 mm) Double-sided adhesive tape manufactured by 3M Japan Ltd.: 3M VHB Tape 5604A-GP (hereinafter referred to as "5604A-GP", base material: acrylic foam, adhesive layer: acrylic adhesive, adhesive thickness: 0.4 mm, 90° peel strength: 11.9 N / 25 mm) Sekisui Chemical Co., Ltd., double-sided adhesive tape: No. 6100 (hereinafter referred to as "6100"), substrate: cloth, adhesive layer: rubber-based adhesive, adhesive thickness: 0.4 mm, 90° peel strength: 3.0 N / 25 mm)

[0048] - 90° peel strength of double-sided adhesive tape - The 90° peel adhesive strength of each of the above double-sided pressure-sensitive adhesive tapes was determined in accordance with JIS Z0237:2022 as follows. First, a 25mm-wide double-sided adhesive tape was attached to a 300mm-long, 25mm-wide piece of cedar wood and left to stand for 24 hours at 50% relative humidity and 23°C. After standing, the double-sided adhesive tape was peeled off the cedar wood and attached to the measuring device, where a 90° peel test was performed at a tensile speed of 10mm / min. The adhesive strength was measured from 5mm to 15mm of displacement, excluding the first 5mm after the start of the measurement. The above measurement was performed on 10 test pieces, and the arithmetic average value was used. Note that measurement data where the measurement values ​​were unstable, such as when the double-sided adhesive tape was torn, were excluded. The measuring device used was a Shimadzu Autograph EZ-XL.

[0049] -Surface material- Daiken Corporation, Volcanic glass composite board: Dailite MS (hereinafter referred to as "Dailite (surface material)"), thickness: 9 mm, density: 750 kg / m 3 〕 -Ventilated furring strip- Cedar wood (length 2813mm, width 45mm, thickness 18mm)

[0050] - Load-bearing panel - The above materials were used in the combinations shown in Tables 1 and 2 to produce load-bearing panels [Example 1] to [Example 16] as shown in Fig. 1. The area where the synthetic resin foam board and the sheet material were laminated and fixed was almost the entire surface. In addition, a load-bearing panel consisting only of the above-mentioned synthetic resin foam board (MFΛ50) is listed as [Comparative Example 1], and a load-bearing panel consisting of a conventional heavy volcanic glass multi-layer board (Dailite (face material)) is listed as [Comparative Example 2] in Table 2.

[0051] - Apparent density of load-bearing panels - The apparent density of each of the produced load-bearing panels was measured. The measurement results are shown in Tables 1 and 2. The apparent density of the load-bearing panel was determined by measuring the total weight of the load-bearing panel, calculating the volume from the outer dimensions of the load-bearing panel, and dividing the total weight by the volume.

[0052] - Tensile modulus of strength panel - Furthermore, a tensile test was carried out on each of the produced load-bearing panels to determine the tensile modulus of elasticity. The determined tensile modulus of elasticity is also shown in Tables 1 and 2. The tensile modulus of elasticity of the load-bearing panel was determined by the following method. The specimens were the same as those in JIS K7127:1999, with reference to the Type 5 specimen. The narrow parallel section had a width of 20 mm, both ends had widths of 80 mm, the gauge length was 96 mm, the narrow parallel section had a length of 100 mm, and the total length was 360 mm. The specimens were the same as those in Type 5 specimens in JIS K7127:1999, except for the thickness of the load-bearing panel. Two specimens were cut from the load-bearing panel: one parallel to the orientation direction of the sheet material (orientation direction) and the other at an angle of 17.9° to the direction parallel to the orientation direction (diagonal direction). Double-sided adhesive tape (Hyper Joint H8004, manufactured by Nitto Denko Corporation) was applied to both ends of the specimen, excluding the 100 mm length of the narrow parallel section. The specimens were then sandwiched between steel plates and attached to a measuring device. A tensile test was performed at a tensile speed of 10 mm / min until the synthetic resin foam panel broke. The tensile modulus was calculated according to the "slope obtained from two points" in JIS K7161-1:2024, "Tensile modulus." The measuring device used was an Autograph EZ-XL manufactured by Shimadzu Corporation. The above measurement was performed on 10 test pieces for each test piece, and the arithmetic average value was used. For the test pieces with an angle of 17.9° with respect to the direction parallel to the orientation direction, two test pieces were prepared: one with an angle of 17.9° to the right with respect to the direction parallel to the orientation direction, and another with an angle of 17.9° to the left with respect to the direction parallel to the orientation direction. The tensile modulus of each was measured, and the arithmetic average value was used.

[0053] [Table 1]

[0054] [Table 2]

[0055] -Load-bearing wall- Using the prepared load-bearing panels of [Example 1] to [Example 16] listed in Tables 1 and 2 and the adhesives listed in Tables 3 and 4, load-bearing walls [Example 1] to [Example 16] as shown in Figures 3 and 4 were constructed. When the load-bearing panels were fixed to the exterior surfaces of the framework members of a wooden building using the adhesive, the area where the load-bearing panels were directly fixed to the exterior surfaces of the framework members of the wooden building was 4270 cm. 2 The ratio of the area directly fixing the load-bearing panel to the outdoor surface of the framework of the wooden building relative to the area of ​​the load-bearing panel was 0.18. The area of ​​the adhesive fixing the ventilated furring strip to the outdoor surface of the load-bearing panel covered almost the entire surface of the ventilated furring strip. The wood screws were installed at a pitch of 200 mm. In Example 3, the load-bearing wall was constructed so that the surface of the load-bearing panel to which the sheet material was attached was in contact with the outdoor surface of the framework of the wooden building. Furthermore, a bearing wall constructed using a bearing panel made only of synthetic resin foam board (MFΛ50) of [Comparative Example 1] listed in Table 2 and double-sided adhesive tape in the same manner as in the above-mentioned Examples is listed as [Comparative Example 1], and a bearing wall constructed using a bearing panel made of a conventional volcanic glass multilayer board (Dailite (face material)) of [Comparative Example 2] listed in Table 2 without fixing it to the framework of a wooden building with adhesive or the like as in the conventional manner is listed as [Comparative Example 2] in Table 4. Furthermore, a bearing wall constructed using the bearing panel of [Example 1] listed in Table 1 without fixing it to the framework of a wooden building with adhesive or the like as in the conventional manner is listed as [Reference Example 1] in Table 4.

[0056] The wall ratio was measured for each of the constructed shear walls. The measurement results are shown in Tables 3 and 4. The wall ratio of the shear wall was measured using the following method. The wall factor is calculated by dividing the short-term allowable shear strength (Pa) by the specified strength (wall length L (m) x 1.96 (kN / m)), as stated in the "Testing and Evaluation Procedures for Wooden Shear Walls and Their Factors (2012 Edition)" (published by the Building Materials Testing Center). In other words, the wall factor is an indexed value obtained by dividing the short-term allowable shear strength (Pa) by this standard value (1.96L). The test equipment used was a column-base fixed type, and the loading device was one that could apply appropriate repeated loads. The test method is a column base fixed type. (1) The loading method was alternating positive and negative repeated loading, and the principle of repetition was to apply positive and negative deformations with apparent shear deformation angles of 1 / 450, 1 / 300, 1 / 200, 1 / 150, 1 / 100, 1 / 75, and 1 / 50 rad. (2) The test consisted of three repeated load applications at the same stage. (3) After reaching the maximum load, the load was applied until it decreased to 80% of the maximum load, or until the deformation angle of the specimen reached 1 / 15 rad or more. (4) The load capacity of the loading system was set to 2000N / m. In calculating the wall factor, the smallest of the four types of strength values ​​below was determined as the short-term standard shear strength (P0), and this was multiplied by a specified reduction coefficient (α) (a coefficient that evaluates the factors behind the reduction in strength).The short-term standard shear strength (P0) value calculated from the following strength values ​​(Py, Pu, Pmax) is the value obtained by multiplying the following value by the variation coefficient (β). (a) Yield strength (py) (b) The value of the ultimate strength (Pu) corrected based on the ductility factor (μ) (the value obtained by dividing the ultimate strength Pu by 1 / √(2μ / 1) and multiplying it by 0.2) (c) 2 / 3 of the maximum strength (Pmax) (d) Strength at specific deformation (strength at apparent shear deformation angle of 1 / 120rad)

[0057] [Table 3]

[0058] [Table 4]

[0059] The load-bearing panels according to the present invention were lightweight and had excellent tensile modulus even when the sheet material was changed, as shown in Tables 1 and 2. Furthermore, the load-bearing walls constructed by the construction method according to the present invention using these load-bearing panels had sufficient wall multipliers comparable to those of load-bearing walls using conventional face materials (Comparative Example 2), as shown in Tables 3 and 4. [Industrial Applicability]

[0060] The load-bearing wall construction method, load-bearing panel, and load-bearing wall of the present invention are lightweight and easy to construct on site, and also exhibit excellent strength characteristics as structural components.In addition, they have insulating properties and are highly energy-saving, so they can be widely used in the construction of load-bearing walls in wooden buildings. [Explanation of symbols]

[0061] 1. Load-bearing panel 10 Synthetic resin foam board 20 Sheet material 30 Frame material 31 pillars 32 Studs 33 Cross beam 40 Adhesives or adhesives 50 Load-bearing wall 60 Ventilated furring strip 70 Adhesives or adhesives 80 Fixing means

Claims

1. A method for constructing a load-bearing wall of a wooden building, characterized in that a sheet material is laminated and fixed to at least one side of a synthetic resin foam board to form a load-bearing panel, and the load-bearing panel is fixed to the exterior surface of the frame material of the wooden building with an adhesive or glue.

2. 2. The method for constructing a bearing wall according to claim 1, wherein the sheet material has a tensile load of 5 N / 6 mm or more when stretched by 0.1 mm.

3. 3. The method for constructing a bearing wall according to claim 1, wherein the sheet material is laminated and fixed to both sides of the synthetic resin foam board to form a bearing panel.

4. 3. A method for constructing a shear wall as described in claim 1 or 2, characterized in that after the above-mentioned load-bearing panel is fixed to the outdoor surface of the frame member of a wooden building, the ventilated furring strip is placed on the outdoor surface of the load-bearing panel at the location where the frame member is located by fixing the ventilated furring strip and the load-bearing panel with an adhesive or glue, and the ventilated furring strip and the load-bearing panel are fixed to the frame member by a fixing means that passes through the ventilated furring strip and the load-bearing panel.

5. 3. The method for constructing a bearing wall according to claim 1, wherein the exterior surfaces of the framework members and the bearing panels are fixed together with double-sided adhesive tape.

6. 6. The method for constructing a bearing wall according to claim 5, wherein the double-sided adhesive tape has an adhesive layer made of an acrylic adhesive.

7. 3. The method for constructing a bearing wall according to claim 1, wherein the sheet material is one or more types of sheet material selected from inorganic fiber sheets, thermoplastic resin sheets, inorganic fiber-impregnated resin sheets, and waterproof paper.

8. A load-bearing panel used in the load-bearing walls of wooden buildings, characterized in that the load-bearing panel is made of a synthetic resin foam board with a sheet material laminated and fixed to at least one side thereof.

9. 9. The load-bearing panel according to claim 8, wherein the sheet material has a tensile load of 5 N / 6 mm or more when stretched by 0.1 mm.

10. 10. The load-bearing panel according to claim 8, wherein the sheet material is laminated and fixed to both sides of the synthetic resin foam board.

11. The apparent density of the load-bearing panel is 100 kg / m 3 10. A load-bearing panel according to claim 8 or 9, characterized in that:

12. The thickness of the synthetic resin foam board is 20 mm or more and 100 mm or less, and the ratio of the total thickness (mm) of the sheet material to the thickness (mm) of the synthetic resin foam board is 0.003 to 0.

05. The load-bearing panel according to claim 8 or 9.

13. 10. The load-bearing panel according to claim 8 or 9, wherein the sheet material is one or more types of sheet material selected from an inorganic fiber sheet, a thermoplastic resin sheet, an inorganic fiber-impregnated resin sheet, and waterproof paper.

14. A load-bearing wall of a wooden building using the load-bearing panel according to claim 8 or 9, characterized in that the load-bearing panel and the exterior surface of the framework of the wooden building are fixed together with an adhesive or glue.

15. 15. The bearing wall according to claim 14, wherein the bearing wall has a wall ratio of 2.5 or more.

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