Insulation structure for building and construction method for the same

Abstract

To provide an insulation structure for buildings capable of improving workability and preventing the occurrence of internal condensation.SOLUTION: An insulation structure 1 for a building in an embodiment comprises: a furring strip 3 installed on a column 2; an exterior cladding material 4 joined to an outdoor side of the furring strip 3; and an interior cladding material 5 joined to an indoor side of the furring strip 3. The exterior cladding material 4 has an exterior cladding body portion 41 and an outer insulation material 42 bonded to an inner surface of the exterior cladding body portion 41. The interior cladding material 5 has an interior cladding body portion 51, a moisture barrier sheet 52 bonded to an inner surface of the interior cladding body portion 51, and an inner insulation material 53 bonded to an inner surface of the moisture barrier sheet 52.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a thermal insulation structure for a building and a method for constructing the thermal insulation structure. [Background technology]

[0002] Conventionally, a technology for insulating buildings is disclosed, for example, in Patent Document 1. The exterior wall structure of Patent Document 1 is a building exterior wall structure in which an insulating layer is arranged on the outdoor side of columns and beams at the outer edge or periphery of a concrete building, and the exterior wall has a double-wall structure consisting of a structural frame area, a steel structural wall portion equipped with steel structural studs, and an interior wall portion with a steel wall base arranged at an interval on the indoor side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 256016 Summary of the Invention [Problem to be solved by the invention]

[0004] As shown in Figures 3(a) and 3(b), a conventional heat-insulating structure 91 such as the technology disclosed in Patent Document 1 includes furring strips 93 installed on columns 92, exterior materials 94 joined to the exterior side of the furring strips 93 with screws 97, and interior materials 95 joined to the interior side of the furring strips 93 with screws 97. The furring strips 93 are made of shaped steel such as channel steel, and include vertical furring strips 931 extending in the vertical direction and horizontal furring strips 932 extending in the left-right direction. Heat insulating material 96 such as glass wool is laid between the horizontal furring strips 932 arranged in the vertical direction.

[0005] When constructing a conventional thermal insulation structure 91, after joining exterior materials 94 to furring strips 93 with screws 97, a worker reaches into the space where the furring strips 93 will be placed and lays out thermal insulation 96. Then, an interior material 95 is joined to the furring strips 93 with screws 97. However, in the space where the furring strips 93 will be placed, the tips of the screws 97 that secure the exterior material 94 to the furring strips 93 and the end faces of the structural steel that makes up the furring strips 93 are exposed. For this reason, the task of laying out the thermal insulation 96 in the space where the furring strips 93 will be placed is dangerous, and it is difficult to lay out the thermal insulation 96 without any gaps. Therefore, the conventional thermal insulation structure 91 has a situation in which the workability of installing the thermal insulation 96 is low.

[0006] Furthermore, in the conventional thermal insulation structure 91, insulation material 96 is laid between the horizontal furring strips 932. However, the insulation material 96, such as glass wool, may sag due to gravity, resulting in the expected thermal insulation effect not being achieved. In such cases, the temperature inside the wall drops, and high-humidity indoor air comes into contact with low-temperature areas inside the wall (the furring strips 93 and the exterior material 94 side of the insulation material 96), causing internal condensation, which can lead to rust and corrosion of the steel material that makes up the furring strips 93 and mold growth in the insulation material 96. For this reason, technology that can prevent internal condensation is needed.

[0007] Therefore, the present invention was devised in consideration of the above-mentioned circumstances, and its purpose is to provide an insulating structure and a method for constructing an insulating structure that can improve workability and prevent the occurrence of internal condensation. [Means for solving the problem]

[0008] The thermal insulation structure of a building according to the present invention is a thermal insulation structure of a building, comprising: furring strips attached to a frame; exterior materials joined to the outdoor side of the furring strips; and interior materials joined to the indoor side of the furring strips, wherein the exterior materials have an exterior main body portion and an outer insulating material attached to the inner surface of the exterior main body portion, and the interior materials have an interior main body portion, a moisture-proof sheet attached to the inner surface of the interior main body portion, and an inner insulating material attached to the inner surface of the moisture-proof sheet.

[0009] The method for constructing a thermal insulation structure of a building according to the present invention is a method for constructing a thermal insulation structure of a building, characterized by comprising an exterior material joining process for joining an exterior material having an outer insulation material attached to the inner surface of an exterior main body portion to the outdoor side of a furring strip provided on a frame, and an interior material joining process for joining an interior material having a moisture-proof sheet attached to the inner surface of an interior main body portion and an inner insulation material attached to the inner surface of the moisture-proof sheet to the indoor side of the furring strip. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a heat insulating structure and a method for constructing a heat insulating structure that are easy to work with and can suppress the occurrence of internal condensation. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1(a) is a plan cross-sectional view showing an example of a thermal insulation structure for a building in the embodiment, and FIG. 1(b) is a side cross-sectional view showing an example of a thermal insulation structure for a building in the embodiment. [Figure 2] FIG. 2 is a diagram illustrating the temperature distribution in the thermal insulation structure of the building according to the embodiment. [Figure 3] FIG. 3(a) is a plan cross-sectional view showing an example of a conventional heat insulating structure, and FIG. 3(b) is a side cross-sectional view showing an example of a conventional heat insulating structure. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out a thermal insulation structure for a building and a method for constructing a thermal insulation structure for a building to which the present invention is applied will be described in detail with reference to the drawings.

[0013] <Embodiment: Building insulation structure 1> As shown in Figure 1, a thermal insulation structure 1 for a building is used in the walls of a building. The thermal insulation structure 1 for a building comprises columns 2 that form a framework, furring strips 3 attached to the columns 2, exterior materials 4 joined to the exterior sides of the furring strips 3, and interior materials 5 joined to the interior sides of the furring strips 3. Beams (not shown) that form the wall are erected on the columns 2. An air space is formed between the exterior materials 4 and the interior materials 5. The columns 2 are made of steel, such as square steel pipes, but may also be made of wood.

[0014] The furring strips 3 are made of shaped steel such as channel steel. The furring strips 3 have vertical furring strips 31 that extend in the up-down direction and horizontal furring strips 32 that extend in the left-right direction. The vertical furring strips 31 are joined to the beams on which the columns 2 are erected. The horizontal furring strips 32 are erected on the columns 2. The ends of the horizontal furring strips 32 in the extension direction are joined to the columns 2.

[0015] The horizontal furring strips 32 are arranged, for example, on the outdoor side of the vertical furring strips 31. In the present invention, the furring strips arranged on the outdoor side may be vertical furring strips extending in the vertical direction. The furring strips arranged on the indoor side may be horizontal furring strips extending in the left-right direction. The furring strips 3 may have at least one of the vertical furring strips 31 and the horizontal furring strips 32.

[0016] The exterior cladding material 4 is joined to the exterior-side horizontal furring strips 32 by joining members 7. The exterior cladding material 4 has an exterior cladding main body portion 41 and an outer insulating material 42 attached to the inner surface of the exterior cladding main body portion 41.

[0017] The exterior main body 41 is made of a plate-like material such as slate or siding board.

[0018] The outer insulation material 42 is formed in a plate shape. The outer insulation material 42 is made of foamed plastic insulation material obtained by foam molding plastics such as polyurethane, polystyrene, polyolefin, phenolic resin (PF), melamine resin, and PVC. The outer insulation material 42 is installed in contact with the horizontal furring strips 32.

[0019] The interior material 5 is joined to the indoor-side vertical furring strips 31 by joining members 7. The interior material 5 has an interior main body 51, a moisture-proof sheet 52 attached to the inner surface of the interior main body 51, and an inner heat insulating material 53 attached to the inner surface of the moisture-proof sheet 52.

[0020] The interior body portion 51 is made of a plate-like member such as plasterboard.

[0021] For example, a polyethylene film or the like is used for the moisture-proof sheet 52. The moisture-proof sheet 52 prevents the moist air from inside the room from entering the space inside the thermal insulation structure 1 and from coming into contact with the inner insulation material 53. This makes it possible to suppress mold growth on the inner insulation material 53.

[0022] The inner heat insulating material 53 is formed in a plate shape. A heat insulating material such as glass wool is used for the inner heat insulating material 53. The inner heat insulating material 53 may be a foamed plastic heat insulating material obtained by foam molding a polyurethane-based, polystyrene-based, polyolefin-based, phenolic resin (PF)-based, melamine resin-based, PVC-based, or other plastic.

[0023] For example, screws are used as the joining members 7. The joining members 7 that join the exterior material 4 to the horizontal furring strips 32 penetrate the exterior body portion 41 and the outer insulation material 42. The joining members 7 that join the interior material 5 to the vertical furring strips 31 penetrate the interior body portion 51 and the moisture-proof sheet 52.

[0024] When the thickness of the outer heat insulating material 42 is D2 and the thickness of the inner heat insulating material 53 is D1, it is preferable that the following formula (1) is satisfied.

[0025] D2≧(λ2 / λ1)×D1×(8-t1) / 7 (1) where: D2: Thickness of outer insulation (mm) D1: Thickness of inner insulation (mm) λ2: Thermal conductivity of the outer insulation (W / m K) λ1: Thermal conductivity of the inner insulation (W / m K) t1: Average temperature of the coldest month (℃)

[0026] By satisfying formula (1), the thickness D2 of the outer insulation material 42 can be reduced, allowing the exterior body portion 41 to be firmly joined to the horizontal furring strips 32 by the joining members 7. In addition, because the thickness D2 of the outer insulation material 42 can be reduced, the exterior body portion 41 and the outer insulation material 42 attached to the exterior body portion 41 can be prevented from sagging due to gravity.

[0027] The sum of the thickness D2 of the outer heat insulating material 42 and the thickness D1 of the inner heat insulating material 53 may be a thickness specified by the Energy Saving Act and other regulations.

[0028] <An example of how to construct a thermal insulation structure 1 for a building> Next, a description will be given of a method for constructing the thermal insulation structure 1 for a building. The method for constructing the thermal insulation structure 1 for a building includes an exterior material joining step and an interior material joining step.

[0029] The method for constructing a thermal insulation structure 1 for a building starts with the state in which furring strips 3 are attached to the columns 2 that form the framework.

[0030] In the exterior material joining process, the exterior material 4, in which the outer insulating material 42 is attached to the inner surface of the exterior body 41, is joined to the horizontal furring strips 32 arranged on the outdoor side of the furring strips 3. Joining the exterior material 4 to the furring strips 3 prevents wind and rain from entering the indoor side.

[0031] Then, in the interior material joining process, a moisture-proof sheet 52 is attached to the inner surface of the interior main body 51, and the interior material 5, in which an inner heat insulating material 53 is attached to the inner surface of the moisture-proof sheet 52, is joined to the vertical furring strip 31 located on the indoor side of the furring strip 3 by a joining member 7.

[0032] This completes one example of the method for constructing the thermal insulation structure 1 for a building.

[0033] As shown in Figure 2, when the indoor temperature is higher than the outdoor temperature, the temperature gradually decreases from the indoor side toward the outdoor side. In this regard, according to this embodiment, the exterior cladding 4 has an exterior cladding main body 41 and an outer insulating material 42 attached to the inner surface of the exterior cladding main body 41. Because the outer insulating material 42 is disposed between the exterior cladding main body 41 and the furring strips 3, it is possible to prevent outdoor cold air from being transmitted to the furring strips 3, which are prone to temperature drops. This makes it possible to suppress a drop in temperature inside the thermal insulation structure 1.

[0034] Furthermore, according to this embodiment, the interior material 5 has an interior main body 51, a moisture-proof sheet 52 attached to the inner surface of the interior main body 51, and an inner insulating material 53 attached to the inner surface of the moisture-proof sheet 52. This prevents indoor moist air from entering the space inside the thermal insulation structure 1 and from coming into contact with the inner insulating material 53.

[0035] In this way, the temperature inside the thermal insulation structure 1 is prevented from dropping, keeping the temperature inside the thermal insulation structure 1 above the temperature at which condensation occurs, and preventing indoor humid air from penetrating into the thermal insulation structure 1. This prevents internal condensation from occurring. This also prevents rust and corrosion on the furring strips 3 and mold growth on the outer insulation material 42 and inner insulation material 53. As a result, repairs and maintenance work to address corrosion, rust, and mold that occurs inside the thermal insulation structure 1 is no longer necessary.

[0036] In addition, in the space inside the insulation structure 1 where the furring strips 3 are placed, the tips of the screws that make up the connecting members 7 that secure the exterior material 4 to the furring strips 3 and the end faces of the structural steel that makes up the furring strips 3 are exposed.

[0037] In this regard, this embodiment includes an exterior material joining process in which an exterior material 4, in which an exterior insulation material 42 is attached to the inner surface of an exterior body portion 41, is joined to the outdoor side of a furring strip 3 to be installed on a column 2, and an interior material joining process in which an interior material 5, in which a moisture-proof sheet 52 is attached to the inner surface of an interior body portion 51 and an interior insulation material 53 is attached to the inner surface of the moisture-proof sheet 52, is joined to the indoor side of the furring strip 3. This allows workers to install the exterior insulation material 42 and the interior insulation material 53 without having to reach into the space where the furring strip 3 is located. This allows the exterior insulation material 42 and the interior insulation material 53 to be joined safely. Furthermore, because the exterior material 4, to which the exterior insulation material 42 has already been attached, is joined to the horizontal furring strip 32, and the interior material 5, to which the interior insulation material 53 has already been attached, is joined to the vertical furring strip 31, construction is facilitated and workability is improved.

[0038] According to this embodiment, formula (1) is satisfied. This allows the thickness D2 of the outer insulation material 42 to be thin, so that the exterior body portion 41 can be firmly joined to the horizontal furring strips 32 by the joining members 7. Furthermore, the exterior body portion 41 and the outer insulation material 42 attached to the exterior body portion 41 can be prevented from sagging due to gravity. As a result, maintenance for deterioration over time, such as sagging due to gravity, of the outer insulation material 42 is not required.

[0039] The present invention may be applied to the ceiling of a building in addition to the walls of the building. In this case, the beams, joists, joists, and rafters that support the ceiling constitute the framework.

[0040] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Furthermore, these embodiments can be implemented in various combinations as appropriate. Furthermore, the present invention can be implemented in various novel forms in addition to the above-described embodiments. Therefore, various omissions, substitutions, and modifications are possible in each of the above-described embodiments without departing from the spirit and scope of the present invention. Such novel forms and modifications are included within the scope and spirit of the present invention, as well as within the scope of the inventions set forth in the claims and equivalents of the inventions set forth in the claims. [Explanation of symbols]

[0041] 1: Building insulation structure 2: Pillar 3: Fusumi 31: Vertical furring strip 32: Horizontal furring strip 4: Exterior material 41: Exterior body 42: Outer insulation 5: Interior materials 51: Interior body 52: Moisture-proof sheet 53: Inner insulation 7: Joint material 91: Insulated structure 92: Pillar 93: Fusing 931: Vertical furring strip 932: Horizontal furring strip 94: Exterior materials 95: Interior materials 96: Insulation material 97: Screw

Claims

1. A thermal insulation structure for a building, A furring strip provided on the framework; An exterior material joined to the exterior side of the furring strip; An interior material joined to the indoor side of the furring strip, The exterior material has an exterior body portion and an outer heat insulating material attached to an inner surface of the exterior body portion, The interior material has an interior body part, a moisture-proof sheet attached to the inner surface of the interior body part, and an inner heat insulating material attached to the inner surface of the moisture-proof sheet. A thermal insulation structure for a building characterized by the above.

2. The following formula (1) is satisfied: The thermal insulation structure for a building according to claim 1, D2≧(λ2 / λ1)×D1×(8-t1) / 7 (1) where: D2: Thickness of outer insulation (mm) D1: Thickness of inner insulation (mm) λ2: Thermal conductivity of the outer insulation material (W / m K) λ1: Thermal conductivity of the inner insulation material (W / m K) t1: Average temperature of the coldest month (℃)

3. A method for constructing a thermal insulation structure of a building, comprising: an exterior material joining process of joining the exterior material, in which the outer insulation material is attached to the inner surface of the exterior body portion, to the outdoor side of the furring strip provided on the frame; and an interior material joining step of joining an interior material in which a moisture-proof sheet is attached to the inner surface of the interior body part and an inner heat insulating material is attached to the inner surface of the moisture-proof sheet to the indoor side of the furring strip. A method for constructing a thermal insulation structure for a building, characterized by the above.

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