Heat shield structure and method for constructing heat shield structure

Abstract

To provide a heat shielding structure and a construction method of the heat shielding structure, capable of easily installing a heat shielding sheet, regardless of a new or existing structure.SOLUTION: The heat shielding structure 1 includes a belt-like body part 10 made of a heat shielding sheet having flexibility, and a fixing part 20 fixed to a constituent member of a building on both sides in the longitudinal direction of the heat shielding sheet, and the fixing part 20 includes a reinforcing material 22 for improving the strength of the heat shielding sheet, and can be bent in a substantially recessed groove shape along a boundary between the body part 10 and the fixing part 20 on both sides.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heat shielding structure provided directly under the roof, under the floor, on the wall, etc. of a building, and to a method for installing the heat shielding structure. [Background technology]

[0002] Rising indoor temperatures in buildings during the summer have long been a problem. To combat this, heat-shielding sheets that reflect radiant heat from sunlight have been used. Heat-shielding sheets are not only used in new buildings, but are also retrofitted to existing buildings.

[0003] As in Patent Document 1, heat shielding sheets are laminated layers of metal layers such as aluminum layers and other layers such as glass fiber layers and synthetic resin sheet layers, and in recent years, sheets with a thickness of 10 mm or less have been used for construction, with thin types ranging from 1 mm to several hundred μm. The composition and thickness of the laminated structure are selected appropriately depending on the location of use, but it is preferable to use a thin and lightweight heat shielding sheet for installation on the back side directly under the roof.

[0004] Regarding the method of installing heat-shielding sheets, when installing them on the inside of the roof of a newly built house, scaffolding is prepared, the heat-shielding sheets are placed between the rafters and other trusses, and while adjusting the sheet position, the two ends of one width of the heat-shielding sheet are temporarily fastened to the roof components, and the center of the other side is temporarily fastened. After temporarily fastening the two ends of the other side and the center of one side, screws are driven into both sides at a specified interval to secure them in place.

[0005] On the other hand, in the case of an existing home, the heat-shielding sheet must first be cut to the appropriate length and carried into the attic through a narrow access door in the ceiling.In addition to the above, it is extremely difficult to go back and forth through the small space in the attic to place the heat-shielding sheet and adjust its position while securing it.

[0006] Another form of heat shielding material is a panel, and Patent Document 2 describes a roof insulation panel characterized by having a single groove or multiple parallel grooves extending from one end to the other, with approximately horizontal support pieces extending outward along the upper left and right edges of the groove. It also describes that the panel body is preferably molded using a synthetic resin such as polyvinyl chloride, polypropylene, or polyethylene, and foamed as needed, and that a heat-reflecting sheet such as aluminum foil, aluminum-coated kraft paper, or other white sheet is attached to the inner surface of the groove. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2024-048378 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-090088 Summary of the Invention [Problem to be solved by the invention]

[0008] However, conventional methods for installing heat-shielding sheets required unstable footing, long hours of work facing upward in the narrow attic space, and laborious work requiring the driving of fastening devices such as nails, screws, and U-shaped pins into numerous locations. Furthermore, conventional insulation panels are not prone to damage during installation like thin sheets, and can be installed simply by placing them between rafters. However, the width and depth of the grooves and the width of the support pieces had to be adjusted to fit the rafters at the installation site. Furthermore, because the sheathing, waterproof sheeting, and roofing materials are sequentially installed on top of the insulation panels placed on the top of the rafters, there was a problem that they could not be used for roof renovation work on existing homes.

[0009] The present invention has been made in consideration of these circumstances, and aims to provide a heat shielding structure that allows heat shielding sheets to be easily attached to both new and existing structures, and a method for installing the heat shielding structure. [Means for solving the problem]

[0010] The heat-shielding structure of claim 1 includes a strip-shaped main body made of a flexible heat-shielding sheet, and fixing parts on both longitudinal sides of the heat-shielding sheet that are fixed to structural members of a building, the fixing parts having reinforcing material that improves the strength of the heat-shielding sheet, and being capable of being bent into an approximately concave groove shape along the boundaries between the main body and the fixing parts on both sides.

[0011] The heat shielding structure of claim 2 is characterized in that in claim 1, the heat shielding sheet is laminated with metal foil and a resin film, nonwoven fabric, woven fabric, glass fiber fabric, metal foil, or a combination thereof.

[0012] The heat shielding structure of claim 3 is characterized in that, in claim 1 or 2, the reinforcing material includes wood, resin, nonwoven fabric, woven fabric, or a combination thereof, and is fixed to both longitudinal sides of the heat shielding sheet.

[0013] The method for installing a heat shielding structure of claim 4 is characterized in that the heat shielding structure includes a strip-shaped main body made of a flexible heat shielding sheet, and fixing parts that are provided on both longitudinal sides of the heat shielding sheet with reinforcing materials that improve the strength of the heat shielding sheet and are fixed to structural members of a building, and both sides of the heat shielding structure that are placed directly below the roof, under the floor, on a wall, etc. are folded along the boundary between the main body and the fixing parts, and the fixing parts are each fixed to adjacent extending structural members, so that the heat shielding structure is stretched in a generally concave groove shape.

[0014] The method of installing a heat-shielding structure of claim 5 is characterized in that, in claim 4, the heat-shielding sheet is laminated with metal foil and a resin film, nonwoven fabric, woven fabric, glass fiber fabric, metal foil, or a combination thereof, and the heat-shielding structure is arranged with the side of the main body of the heat-shielding sheet made of metal foil facing outdoors.

[0015] The construction method for a heat shielding structure of claim 6 is characterized in that, in claim 4 or 5, a reinforcing material containing wood, resin, nonwoven fabric, woven fabric, or a combination thereof is fixed to both longitudinal sides of the heat shielding sheet to form a fixing portion, and the fixing portion is folded along the boundary with the main body portion and fixed to a constituent member using a fixing member.

[0016] The method of constructing a heat-shielding structure of claim 7 is characterized in that, in claim 6, the fixing portion on one side is folded along the boundary with the main body portion and fixed to the component, the width of the main body portion is adjusted to the distance between adjacent extending components, and the excess heat-shielding sheet in the width direction is overlapped on the fixing portion on the other side and fixed to the component. [Effects of the Invention]

[0017] According to the present invention, the heat shielding structure and the method for installing the heat shielding structure of the present invention make it possible to easily install a heat shielding sheet in either a new or existing structure. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is an explanatory diagram showing a first embodiment of a heat shield structure according to the present invention. [Figure 2] FIG. 3 is a schematic explanatory view showing a method for constructing the heat shield structure of the first embodiment. [Figure 3] FIG. 10 is a schematic explanatory view showing a method for constructing the heat shield structure of Example 2. [Figure 4] This is an enlarged view of a portion near the main building on the right side of Figure 3. [Figure 5] FIG. 10 is a schematic explanatory view showing a method for constructing the heat shield structure of Example 3. [Figure 6] FIG. 10 is a schematic explanatory view showing a method for constructing the heat shield structure of Example 4. [Figure 7] FIG. 10 is a schematic explanatory view showing a method for constructing the heat shield structure of Example 5. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 is a perspective view illustrating a first embodiment of a heat shielding structure according to the present invention. Fig. 2 is a schematic explanatory diagram illustrating a construction method for attaching a heat shielding structure directly below the roof of a building. Fig. 3 is a schematic explanatory diagram illustrating another construction method for attaching a heat shielding structure directly below the roof of a building. Fig. 4 is a partial enlarged view of the vicinity of the right-hand main building in Fig. 3. Fig. 5 is a schematic explanatory diagram illustrating a construction method for attaching a heat shielding structure to the underfloor of a newly constructed building. Fig. 6 is a schematic explanatory diagram illustrating a construction method for attaching a heat shielding structure to the underfloor of an existing building. Fig. 7 is a schematic explanatory diagram illustrating a construction method for attaching a heat shielding structure to the wall of a building. Note that fixing members are omitted from Figs. 5 to 7.

[0020] As shown in Figures 1 and 2, the heat-shielding structure 1 according to the present invention is a heat-shielding sheet that is installed on the indoor side directly under the roof of a building, under the floor, on walls, etc., and includes a main body 10 and a fixing part 20. The heat-shielding structure 1 can be installed not only when a new building such as a house, store, or factory is constructed, but also afterwards on an existing building. Furthermore, the heat-shielding structure 1 is not limited to the shape, material, size, etc. of the roof, under the floor, walls, etc., and when installed on a roof, it can also be applied to roofs whose roofing materials are tiles, slate, metal sheets, etc.

[0021] The main body 10 is made of a flexible heat-shielding sheet and is strip-shaped. The width of the main body 10 is approximately the same as the distance L1 between a pair of adjacent extending components A that make up the building where the heat-shielding structure 1 is installed, or is longer than the distance L1 between the pair of components A. Here, the components A refer to, for example, the purlins and eaves beams that make up the roof truss in the case of a roof, pillars and the like including through columns, pipe columns and partitions in the case of a wall, and the sills, joists and the like of the floor framing in the case of an underfloor area. The length of the main body 10 may be adjusted as appropriate, but may be approximately the same as the longitudinal length of the components A on which the heat-shielding structure 1 is installed, or may be divided as necessary.

[0022] The material of the heat-shielding sheet is not limited as long as it can reflect radiant heat, but a laminate of metal foil, resin film, nonwoven fabric, woven fabric, glass fiber fabric, etc. is preferred. The order of lamination is arbitrary, but it is more preferred that at least one surface has metal foil with excellent reflective performance. For example, a metal foil is laminated with a resin film, nonwoven fabric, woven fabric, glass fiber fabric, metal foil, or a combination thereof. The heat-shielding sheet is preferably moisture-permeable.

[0023] The metal foil is more preferably an aluminum foil made of aluminum or an aluminum alloy. The resin film is more preferably made of polyethylene, polyethylene terephthalate, polypropylene, etc. The thickness of the heat shield sheet is optional, but is, for example, about 0.1 mm to 10 mm.

[0024] The fixing portions 20 extend on both longitudinal sides of the heat shielding sheet, are fixed to the component A that constitutes the attic, and include reinforcing materials 22 that improve the strength of the heat shielding sheet. The fixing portions 20 include the longitudinal edge portions of the heat shielding sheet, and are fixed to the component A using screws, nails, U-shaped needles, adhesive, adhesive tape, metal fittings, etc. The longitudinal length of the fixing portions 20 is approximately the same as the longitudinal length of the main body 10 so that the heat shielding structure 1 can be stretched between a pair of component A. The width of the fixing portions 20 is arbitrary as long as they can be fixed to the component A, and is, for example, approximately 10 mm to 100 mm, but it is not necessary for both sides to have the same width.

[0025] In the heat shielding structure 1, the heat shielding sheet that constitutes the main body 10 is flexible, while the strength of the fixing parts 20 is improved by reinforcing materials 22. For this reason, the heat shielding structure 1 can be bent into a generally concave groove shape along the boundaries between the main body 10 and the fixing parts 20 on both sides thereof, as shown in Fig. 2, which is an end view in the width direction.

[0026] In this way, the heat-shielding structure 1 includes fixing parts 20 equipped with reinforcing material 22, and can be bent into a roughly concave groove shape along the boundary between the main body part 10 and the fixing parts 20 on both sides. As a result, the fixing position is quickly determined and the sheet is easily fixed during construction, and wrinkles are less likely to occur, so the heat-shielding sheet can be easily and neatly attached directly under the roof, under the floor, on a wall, etc.

[0027] Furthermore, the material of the reinforcing material 22 of the fixing part 20 preferably includes wood, resin, nonwoven fabric, woven fabric, or a combination thereof, and further, the reinforcing material 22 is preferably fixed to both longitudinal sides of the heat shield sheet. Any fixing method can be used, but if the reinforcing material 22 is in the form of a plate or sheet, it can be adhered to both longitudinal sides of the heat shield sheet using an adhesive, adhesive tape, or the like, or can be welded by heat, high frequency, ultrasonic waves, or the like. Alternatively, if the reinforcing material 22 is a liquid, suspension, or the like, it can be applied, impregnated, or the like to both longitudinal sides of the heat shield sheet and then dried.

[0028] The length of the reinforcing material 22 may be continuous or discontinuous. In other words, a plurality of reinforcing materials 22 may be arranged so that they are the same length as the fixing part 20, or if shorter, so that they are approximately the same length as the fixing part 20, or a plurality of reinforcing materials 22 may be arranged at intervals. The width of the reinforcing material 22 may be approximately the same as the width of the heat shield sheet included in the fixing part 20, or may be longer or shorter, as long as the reinforcing material 22 can be provided on both sides of the heat shield sheet in the longitudinal direction. The thickness of the reinforcing material 22 is preferably approximately 5 mm to 15 mm.

[0029] The method of installing the heat shielding structure 1 involves placing the above-mentioned heat shielding structure 1 directly under a roof, under a floor, on a wall, etc., folding both sides of the heat shielding structure 1 along the boundary between the main body 10 and the fixing parts 20, and fixing the folded fixing parts 20 on both sides to adjacent extending component members A, respectively, to stretch the heat shielding structure 1 in a generally groove-like shape. The order of folding and fixing the left and right sides of the heat shielding structure 1 is arbitrary, and the left and right sides may be fixed alternately or one side at a time.

[0030] Furthermore, when the heat shielding sheet of the heat shielding structure 1 is a laminate of metal foil and a resin film, a nonwoven fabric, a woven fabric, a glass fiber fabric, a metal foil, or a combination thereof, it is preferable to position the heat shielding structure 1 so that the side of the heat shielding sheet of the main body 10 made of metal foil faces the outdoors. By having metal foil on at least one surface and positioning the side made of metal foil on the roof side, excellent reflective performance can be achieved.

[0031] Furthermore, when the reinforcing material 22 includes wood, resin, nonwoven fabric, woven fabric, or a combination thereof, it is preferable to fix the reinforcing material 22 to both longitudinal sides of the heat shield sheet to form the fixing portion 20, and then affix the fixing portion 20 folded along the boundary with the main body portion 10 to the component A using a fixing member 24. The fixing member 24 is, for example, a screw, a nail, a U-shaped needle, or the like.

[0032] Furthermore, when the width of the heat shielding sheet of the main body 30 of the heat shielding structure 2 is longer than the distance L2 between a pair of adjacently extending components B, it is preferable to fold the fixing portion 40 on one side along the boundary with the main body 30 and fix it to the component B, adjust the width of the main body 30 to the distance L2 between the adjacently extending components B, and overlap the excess heat shielding sheet in the width direction onto the fixing portion 40 on the other side and fix it to the component B. In this case, the other side includes the excess heat shielding sheet in the width direction that is overlapped and integrated into the fixing portion 40, and is folded along the boundary between the fixing portion 30 and the fixing portion 40 whose width has been adjusted to the distance L2 between the adjacent components B.

[0033] Regarding the method of overlapping the excess heat shield sheet of the main body 30 with the fixing part 40, as shown in Figures 3 and 4, the excess widthwise heat shield sheet may be wrapped around the reinforcing material 42 of the fixing part 40 and fixed, or if it is longer, it may be wrapped around multiple times, or it may be simply sandwiched and fixed between the fixing part 40 and the component B. The number of turns of wrapping can be adjusted to match the length of the excess widthwise heat shield sheet, but it may also be wrapped around both sides rather than just one side. Using these methods, the width of the main body 30 can be easily adjusted to match the distance L2 between adjacent components B during construction or in advance.

[0034] The heat shield structure of the present invention will be described below with reference to examples. [Example]

[0035] In this embodiment, as shown in Figures 1 and 2, the heat shielding structure 1 is installed directly under the roof of a house and is composed of a main body 10 and a fixing part 20. Note that Figure 2 shows the heat shielding structure 1 stretched between a pair of structural members, the main roofs A, but depending on the size of the attic, multiple heat shielding structures 1 should be stretched in parallel and / or in series to cover the entire attic. The installation of one heat shielding structure 1 will be described below.

[0036] The heat shielding sheet that constitutes the heat shielding structure 1 is approximately 0.9 m wide x 1.8 m long x 0.2 mm thick, and is layered in the following order: aluminum foil, polyethylene sheet, polyethylene cloth, polyethylene sheet, and aluminum foil. Each layer is bonded with a polyurethane resin adhesive. As shown in Figure 1, the heat shielding structure 1 includes fixing portions 20 on both sides of a main body 10 made of a heat shielding sheet.

[0037] The two reinforcing materials 22 attached to the fixing part 20 are preferably nonwoven fabrics made of chemical fibers and are stiff, with one being 75 mm wide and the other 40 mm wide, and both being approximately 1.8 m long and 10 mm thick. The reinforcing materials 22 are each fixed to both ends of the heat shield sheet in the longitudinal direction, approximately 10 mm apart, using an adhesive.

[0038] The construction method of the heat shielding structure 1 of this embodiment will be described below. As shown in Figure 2, the heat shielding structure 1 is stretched between a pair of purlins A supporting a 4-inch slope roof structure in which sheathing boards A2, roofing A3, and roof finishing materials (tiles) A4 are layered in this order on rafters A1. The distance L1 between the opposing surfaces of the pair of purlins A is approximately 860 mm, which is approximately the same as the width of the main body 10.

[0039] The heat shielding structure 1 is brought in and placed directly under the roof, one side of the heat shielding structure 1 is bent along the boundary between the main body 10 and the fixing part 20, and the fixing part 20 is fixed to the purlin A with a fixing member, that is, a screw 24. The other side is similarly bent along the boundary between the main body 10 and the fixing part 20, and the fixing part 20 is fixed to the purlin A with a screw 24. Fixing with the fixing members 24 is performed in multiple places on both sides, and the heat shielding structure 1 is stretched in a generally concave groove shape that opens to the indoor side. The fixing order may be such that one side and the other side are fixed alternately, or one side is fixed first and then the other side. [Example]

[0040] The heat shielding structure 2 of this example is similar to the heat shielding structure 1 of Example 1. For construction, as shown in Fig. 3, the heat shielding structure 2 is stretched between a pair of purlins B supporting a roof structure with a 1-inch slope, in which sheathing boards B2, roofing B3, and roof finishing material (metal roofing material) B4 are layered in this order on rafters B1. The pair of purlins B of this example and the pair of purlins A of Example 1 have the same horizontal distance, i.e., the spacing between them in plan, but because the roof slope of this example is gentler than that of Example 1, the distance L2 between the opposing surfaces of the pair of purlins B is approximately 810 mm, which is approximately 50 mm shorter than the distance L1 of Example 1.

[0041] As shown on the left side of Figure 3, the construction method involves bending one side of the heat shielding structure 2 along the boundary between the main body 30 and the fixing part 40 equipped with the reinforcing material 42, and then fixing the fixing part 40 to the main building B with screws 44. Up to this point, the process is the same as in Example 1, but when the width of the main body 30 is adjusted to the distance L2 between the pair of main buildings B, there is a surplus of approximately 50 mm.

[0042] Therefore, as shown on the right side of Fig. 3 and its enlarged view in Fig. 4, the reinforcing material 42 on the other side is rotated 180 degrees and folded along the boundary between the fixing part 40, which has been integrated by wrapping excess heat-shielding sheet around it in the width direction, and the main body 30, which has its width adjusted to the distance L2 between the pair of purlins B by wrapping excess heat-shielding sheet around the fixing part 40, and the excess heat-shielding sheet in the width direction of the main body 30 and the fixing part 40 on the other side are overlapped and fixed to the purlins B with screws 44. Fixing with the fixing members 44 is performed at multiple points on both sides, and the heat-shielding structure 2 is stretched in a generally concave groove shape that opens to the inside of the room. [Example]

[0043] The heat shielding structure 3 of this example is installed under the floor, as shown in Figure 5. The heat shielding structure 3 is substantially similar to the heat shielding structures 1 and 2 of Examples 1 and 2, but differs in that the width of the reinforcing members 62 of the fixing parts 60 is 40 mm in both cases. Installation is carried out in a new building before the floor subfloor C1 is installed. Installation is carried out between the base C installed on the foundation and the joists C installed on the beams, which are components C that make up the floor structure, and between the joists C and the joists C. The distance L3 between the opposing surfaces of the base C and the joists C that extend adjacently, and the distance L3 between the opposing surfaces of a pair of joists C, is approximately 0.9 m.

[0044] The construction method is the same as in Examples 1 and 2, but construction begins from the top of the floor before the floor underlayment C1 is installed. The heat shielding structure 3 is bent and fixed along the boundary between the main body 50 and the fixing part 60, and is stretched in a groove shape that opens to the indoor side, as shown in Figure 5. [Example]

[0045] The heat-shielding structure 4 of this embodiment is installed under the floor, as in the case of the third embodiment, but is installed in an existing house. The heat-shielding structure 4 is similar to the heat-shielding structure 3 and is attached in the same location, but because the floor underlay D1 is already installed, installation is performed by crawling under the floor from the underfloor side. Therefore, when the heat-shielding structure 4 is bent and fixed along the boundary between the main body 70 and the fixing part 80, the heat-shielding structure 4 is stretched in a groove shape that opens to the outside, which is the worker's side, as shown in FIG. 6. [Example]

[0046] The heat shielding structure 5 of this example is installed on a wall, as shown in Figure 7, which is a horizontal cross section. The heat shielding structure 5 is almost the same as the heat shielding structures 3 and 4 of Examples 3 and 4, but differs in that the width of the heat shielding sheet is approximately 0.4 m. Installation is carried out after the load-bearing surface material E1, which is the exterior wall material, has been installed, but before the plasterboard E2, which is the interior wall, has been installed. The heat shielding structure is installed between a pillar E and a stud E, which are components E that make up the wall. The distance L5 between the opposing surfaces of adjacent extending pillars E and studs E is approximately 0.4 m.

[0047] The construction method is the same as in Examples 1 to 4, except that the heat shielding structure 5 is bent and fixed along the boundary between the main body 90 and the fixing part 100, and then stretched in a groove shape that opens to the indoor side, as shown in Figure 7.

[0048] According to the heat shielding structures 1 to 5 of the present embodiment, the fixing position is quickly determined and easy to fix during installation, and wrinkles are unlikely to occur, so the heat shielding sheet can be easily and neatly attached directly under the roof, thereby reducing the time required for installation. Furthermore, in Example 2, the width of the main body 30 can be adjusted without cutting the heat shielding structure 2 to fit the installation location, making it applicable to various roofs with different slopes, etc.

[0049] Furthermore, the heat shielding structures 1-5 have main bodies 10, 30, 50, 70, and 90 made of flexible heat shielding sheets that can be folded or bent in the width direction, so that even in the case of an existing house, they can be carried into the attic or under the floor through a narrow access door in the ceiling. Furthermore, by arranging multiple heat shielding structures 1-5 in parallel and / or in series, the heat shielding sheet can be installed directly under the roof regardless of the size of the building. In Examples 1 and 2, the heat shielding structures 1 and 2 are installed directly under the roof of the building, but they can also be applied to other locations, such as under the floor in Examples 3 and 4 and on the wall in Example 5.

[0050] The present invention allows various embodiments and modifications without departing from the broad spirit and scope of the present invention. Furthermore, the above-described embodiments are intended to explain the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is defined by the claims, not the embodiments. Various modifications made within the scope of the claims and the meaning of the invention equivalent thereto are considered to be within the scope of the present invention. [Industrial Applicability]

[0051] The present invention can provide a heat shielding structure that allows a heat shielding sheet to be easily attached to either a new or existing structure, and a method for installing the heat shielding structure. [Explanation of symbols]

[0052] 1, 2, 3, 4, 5... Heat shield structure 10, 30, 50, 70, 90...Main body 20, 40, 60, 80, 100...Fixed part 22, 42, 62... Reinforcement 24, 44... Fixing parts (screws)

Claims

1. A heat shielding structure installed directly under the roof, under the floor, or on the wall of a building, A belt-shaped main body made of a flexible heat-shielding sheet; and fixing portions fixed to components of the building on both sides of the heat shield sheet in the longitudinal direction, The fixing portion includes a reinforcing material that improves the strength of the heat shield sheet, A heat shield structure characterized in that it can be bent into a generally concave groove shape along the boundaries between the main body portion and the fixing portions on both sides.

2. 2. The heat shielding structure according to claim 1, wherein the heat shielding sheet is a laminate of a metal foil and a resin film, a nonwoven fabric, a woven fabric, a glass fiber fabric, a metal foil, or a combination thereof.

3. 3. The heat shielding structure according to claim 1, wherein the reinforcing material comprises wood, resin, nonwoven fabric, woven fabric, or a combination thereof, and is fixed to both longitudinal sides of the heat shielding sheet.

4. A construction method for a heat shield structure installed directly under the roof, under the floor, or on the wall of a building, The heat shielding structure includes a belt-shaped main body made of a flexible heat shielding sheet, and a fixing portion provided on both sides of the heat shielding sheet in the longitudinal direction with a reinforcing material that improves the strength of the heat shielding sheet, and fixed to a component of the building, A method for constructing a heat shielding structure, characterized in that both sides of the heat shielding structure placed directly under the roof, under the floor, on a wall, etc. are bent along the boundary between the main body portion and the fixing portion, and the fixing portion is respectively fixed to the adjacent extending component members, thereby stretching the heat shielding structure in a generally concave groove shape.

5. The method for installing a heat shielding structure according to claim 4, characterized in that the heat shielding sheet is a laminate of metal foil and a resin film, a nonwoven fabric, a woven fabric, a glass fiber fabric, a metal foil, or a combination thereof, and the heat shielding structure is arranged with the side of the heat shielding sheet of the main body made of metal foil facing the outdoors.

6. A method for constructing a heat shielding structure as described in claim 4 or 5, characterized in that the reinforcing material, which includes wood, resin, nonwoven fabric, woven fabric, or a combination thereof, is fixed to both sides of the heat shielding sheet in the longitudinal direction to form the fixing portion, and the fixing portion is folded along the boundary with the main body portion and fixed to the component member using a fixing member.

7. A method for installing a heat shielding structure as described in claim 6, characterized in that the fixing portion on one side is folded along the boundary with the main body portion and fixed to the component, the width of the main body portion is adjusted to match the distance between the adjacent extending components, and the excess widthwise portion of the heat shielding sheet is overlapped with the fixing portion on the other side and fixed to the component.

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