JP2013155529A - Heat insulating construction method for building, and heat insulated structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably and stably insert a plate-like heat insulating material, which is made of a synthetic foamed resin, between structural materials by easier construction, in a heat insulating construction method for a building which does not use a metal fitting for fall prevention.SOLUTION: An elastic sheet material 6 is arranged in such a manner as to cross all structural materials 2 and 5 positioned in a section to arrange a plate-like heat insulating material 10 made of a synthetic foamed resin, and fastened to the structural materials 2 and 5. After that, the plate-like heat insulating material 10 made of the synthetic foamed resin is pushed in between the adjacent structural materials 2 and 5 from the top of the fastened elastic sheet material 6.

Description

  The present invention relates to a heat insulation construction method for a building in which a plate-like heat insulating material made of synthetic foam resin is arranged between structural materials of a building, and a heat insulation structure of a building constructed by the heat insulation construction method.

  It is known that a plate-shaped heat insulating material made of synthetic foam resin is inserted and arranged between structural materials of a wooden building to form a heat insulating structure. The structural material in which the plate-like heat insulating material is inserted and arranged may be floor joists, large pulls, or rafters. In any case, in order to prevent the inserted plate-shaped heat insulating material from falling, a metal fitting for prevention of dropping is attached to the structural material, and the back side is supported by the metal fitting, and the plate shape made of synthetic foam resin A heat insulating material is inserted between the structural materials. In such heat insulation construction, the work of attaching the metal fitting for fall prevention to the structural material is a large work amount.

  As a heat insulation construction method that does not use a metal fitting for drop prevention, a suspension material of a predetermined width having flexibility and stretchability is passed between each of a plurality of adjacent plate-like insulation materials, and each suspension material is Patent Document 1 describes a heat insulation construction method in which a plate-shaped heat insulating material is inserted between structural materials while being hung on a structural material of a building and extending a suspension material. Further, in Patent Document 2, a plurality of plate-like heat insulating materials are integrated by a suspension member that is passed through a notch formed in the plate-like heat insulating material in a movable state, and located between the plate-like heat insulating materials. There is described a heat insulation construction method in which a single plate-like heat insulating material is inserted between structural materials in a state where a suspended material is hooked on a structural material of a building.

Japanese Patent Laid-Open No. 2-43435 JP 2005-42302 A

  The heat insulation construction method using the above-described suspension material does not require the work of attaching the metal fitting for fall prevention to the structural material, so it is considered that the heat insulation construction can be facilitated and simplified to some extent. However, it is necessary to perform the work of attaching the suspension material to the plate-like heat insulating material on each of the plate-like heat insulating materials, and the work amount is large. In addition, structural materials having different cross-sectional dimensions may be used depending on the building. However, in the heat insulation construction method described in Patent Document 1, suspension materials having different widths are prepared according to the cross-sectional dimensions of the structural material, and plate-like heat insulation is provided. It is necessary to hang it on the material. Furthermore, since the suspension material does not stretch in the region where the suspension material is bonded to the plate-shaped heat insulating material, the stretching occurs locally in the region that is not bonded to the plate-shaped heat insulation material, resulting in breakage due to stretching. You need to be careful enough not to.

  Further, the plate-like heat insulating material must be inserted between the structural materials arranged in parallel, but in the heat insulation construction method described in Patent Document 2, the suspension material is easy to move at the cut portion of the plate-like heat insulating material, It is inevitable that the construction is complicated because the suspension is inserted between the structural members while being adjusted so that the plate-like heat insulating materials are arranged in parallel while being inserted into the cut portion.

  The present invention has been made in view of the above circumstances, and in a heat insulation construction method for a building that does not use a metal fitting for preventing a fall, it can be reliably and stably synthesized between structural materials by simpler construction. It is an object of the present invention to disclose a heat insulation construction method for a building and a heat insulating structure of the building, which can insert a plate-shaped heat insulating material made of foamed resin.

  A heat insulating construction method for a building according to the present invention is a heat insulating construction method for a building in which a plate-like heat insulating material made of synthetic foam resin is arranged between structural materials, and the plate-like heat insulating material made of synthetic foam resin A step of arranging a stretchable sheet material so as to traverse all of the structural material positioned in the section to be disposed; and a structural material positioned at least on both side edges of the section of the disposed stretchable sheet material. And a step of pushing the plate-shaped heat insulating material made of the synthetic foam resin between adjacent structural members from above the clamped elastic sheet material. And

  Further, the heat insulating structure of a building according to the present invention is a heat insulating structure of a building in which a synthetic foam resin-made plate-like heat insulating material is disposed between structural materials, and the synthetic foamed resin-made plate-like heat insulating material is A stretchable sheet material that traverses all of the structural material located in the compartment to be disposed and is fastened integrally to the structural material located at least on both side edges of the compartment; It comprises at least the plate-like heat insulating material made of the synthetic foamed resin inserted between adjacent structural members by being pushed in from above the stretchable sheet material.

  In the present invention, after fixing the stretchable sheet material using the structural material from the top of the structural material in the compartment where the thermal insulation work is to be performed, the plate-shaped heat insulating material made of synthetic foam resin is formed thereon. What is necessary is just to insert between adjacent structural materials, pressing from the top, and work is very easy. After insertion, the sheet material functions as a suspension material, so that the sheet material does not fall after construction.

  The sheet material with elasticity is gradually stretched by being pushed from above the plate-like heat insulating material, and the plate-like heat insulating material is inserted to a predetermined position by the drawing, but the plate-like heat insulating material and the sheet material are not Since it is in an adhesive state, the stretching proceeds almost throughout the sheet material, and local stretching can be avoided. Thereby, the stable insertion of the plate-shaped heat insulating material proceeds.

  In the present invention, the stretchable sheet material disposed so as to traverse all of the structural material located in the section where the plate-like heat insulating material is to be disposed is at least relative to the structural material located on both side edges of the section. If they are fastened together, the intended purpose can be achieved. Depending on the position and order in which the plate-like heat insulating material is inserted between a plurality of structural materials, there may be a bias in the stretching of the sheet material. In order to avoid this, it is a preferred embodiment to fasten the sheet material to all structural materials. It may be fastened at intervals such as every other line or every other line.

In the present invention, as the sheet material having elasticity, it is preferable to use a sheet material having an elongation rate P (%) at the time of tensile fracture of P1 (%) or more calculated by the following formula (1).
Formula (1): P1 (%) = (L + d × 2) / L × 100
However, L: The distance between the centers of adjacent structural materials, d: The thickness of a plate-shaped heat insulating material.

  If the elongation at the time of tensile rupture does not satisfy the above conditions, there is a possibility that the sheet material may be locally broken or the plate-like heat insulating material made of synthetic foam resin may be broken.

More preferably, as the stretchable sheet material, one having an elongation rate P (%) at the time of tensile fracture of not less than P1 (%) and not more than P2 (%) calculated by the following formula (2) is used. .
Formula (2): P2 = (L + d × 2 + h × 2) / L × 100
Where L: distance between the centers of adjacent structural materials, h: height of the structural material, d: thickness of the plate-like heat insulating material.

  By using a sheet material having an elongation at the time of tensile fracture that satisfies this condition, even when using plate-like heat insulating materials having different thicknesses, it is relatively easy, i.e., without paying special attention. The plate-like heat insulating material can be reliably inserted into a predetermined position, for example, a position flush with the surface of the structural material.

In this invention, what is used by the heat insulation construction method to the conventional building can be used as it is for the plate-shaped heat insulating material made from a synthetic foam resin. As an example, a plate-like heat insulating material of polystyrene-based foamed resin can be mentioned. The physical property values such as the expansion ratio and the compressive strength may be the same as the conventional one. As an example, a plate-like heat insulating material made of a synthetic foam resin having a compressive strength of 5 N / cm ² can be mentioned.

  In the present invention, the stretchable sheet material is a material exhibiting an elongation that allows the plate-like heat insulating material made of synthetic foam resin to sink to a predetermined position, for example, a position flush with the surface of the structural material. Can be used as appropriate. Examples include non-woven fabrics, elastic woven fabrics, natural rubber, artificial rubber, and resin sheets. Examples of the resin sheet include a polyolefin resin sheet, a polyvinyl chloride resin sheet, a polyurethane resin sheet, and the like. Among them, it is possible to use a polystyrene type foam resin plate-like heat insulating material as the synthetic foam resin plate-like heat insulating material, and use a polyolefin resin sheet material or a polyvinyl chloride resin sheet material as the stretchable sheet material. Since the plate-like heat insulating material and the sheet material are difficult to adhere to each other, and the sheet material is easily stretched, this is a preferable combination.

  In the present invention, the width of the stretchable sheet material, that is, the width in the longitudinal direction of the structural material when arranged so as to cross the structural material is arbitrary and is not limited. It may have a width over the entire length of the plate-like heat insulating material inserted between the structural materials. In this case, the sheet material covers the entire surface of the plate-like heat insulating material made of synthetic foamed resin, and the moisture-proof effect on the plate-like heat insulating material is also exhibited. However, since the area to be stretched becomes large, a large force is required to push down the plate-like heat insulating material to a predetermined position. Preferably, a sheet material having a width of about 20 to 200 mm is used. When a sheet material having a width smaller than 20 mm is used, the sheet material may bite into the plate-shaped heat insulating material when pressed down. When a sheet material having a width exceeding 200 mm is used, a large force is required for pressing, and workability may be reduced. The width of the sheet material to be used is appropriately selected from the viewpoint of ease of work in consideration of the compressive strength of the plate-like heat insulating material used and the amount of force required to stretch the sheet material. do it.

  In the present invention, the cross-sectional shape of the synthetic foamed resin plate-like heat insulating material may be rectangular, but a cross-sectional shape in which the width of the bottom surface is smaller than the width of the top surface is more preferable. When using the plate-shaped heat insulating material made of synthetic foam resin in this form, the plate-shaped heat insulating material can be smoothly pushed between the structural materials, and the sheet material can be prevented from stretching locally. .

  According to the present invention, in a heat insulation construction method for a building that does not use a metal fitting for preventing fall, a plate-like heat insulation material made of synthetic foam resin is reliably and stably inserted between structural materials with simpler construction. Therefore, a heat insulating structure having a stable structure can be easily obtained.

The perspective view which shows the state which fastened the sheet | seat material with elasticity in the case where the heat insulation construction method to the building by this invention is applied between the large draws of a wooden building. Sectional drawing which shows the construction procedure in the case of applying the heat insulation construction method to the building by this invention between the big draws of a wooden building. Sectional drawing which shows an example of the plate-shaped heat insulating material made from a synthetic foam resin.

  Hereinafter, the present invention will be described based on embodiments. In the following, the heat insulation construction method for a building according to the present invention will be described as an example in which the base of a wooden building and a large fork are applied as a structural material. However, the structural material is not limited thereto, and floor joists and rafters are used. It may be.

  In FIG. 1, 1 is a cloth foundation made of concrete, on which a base 2 made of square wood is fixed. A pillar 3 and a stud 4 are erected on the base 2, and an appropriate number of large pulls 5 that are also square members are attached between the opposing bases 2 and 2. As shown in FIG. 2, the base 2 and the large pull 5 are square members having a width w and a height h, and the distance between the centers of the base 2 and the large pull 5 and the distance L between the centers of the large pulls 5 and 5 are All are equal.

  The section surrounded by the base 2 is a region to be insulated, and the stretchable sheet material 6 is used as the large section 5 so as to cross all of the structural materials (the base 2 and the large section 5) located in the section. It is arranged so as to be orthogonal to. An appropriate number (two of which are shown in the figure) of the sheet material 6 is arranged at a predetermined interval in the longitudinal direction of the drawing 5, and each sheet material 6 is placed on both sides of the section by staples 7. It is fastened to the structural material (bases 2 and 2) and the two large forks 5 located at the edge. Fixing by two staples 5 to the staples 7 can be omitted.

  In this example, the stretchable sheet material 6 is a polyolefin resin sheet having a width of about 5 cm and a thickness of about 0.03 mm. The stretchable sheet material 6 can be stretched by a predetermined amount before being broken by tension.

As shown in FIG. 1, a plate-like heat insulating material 10 made of synthetic foamed resin is disposed in a section where the sheet material 6 is fastened to the structural material to form a floor heat insulating structure. In this example, the plate-like heat insulating material 10 to be used is a plate-like heat insulating material made of polystyrene-based foamed resin having a rectangular shape with a compressive strength of 5 N / cm ² or more. As shown in FIG. The distance between the adjacent base 2 and the large drawing 5 or the distance x (= L−w) between the large drawing 5 and the large drawing 5 is narrower, and the width b of the upper surface is larger than the distance x. Two V grooves c and c are formed on the upper surface side along the longitudinal direction. In addition, the heat insulating material of this form is already known, and is described in Japanese Patent Application Laid-Open No. 10-110483.

  The plate-like heat insulating material 10 is press-fitted from above the sheet material 6 between the structural materials. That is, as shown in FIGS. 2 (a) and 2 (b), between one base 2 and the adjacent large pull 5, between the large pull 5 and the large pull 5, the large pull 5 and the other base 2 In between, the plate-like heat insulating material 10 is placed and pressed from above. Thereby, the plate-like heat insulating material 10 gradually descends between the structural materials, but simultaneously with the descending, the sheet material 6 fastened between the structural materials also gradually stretches. When a predetermined position is reached, the operator usually pushes down the plate-shaped heat insulating material 10 when the upper surface of the plate-shaped heat insulating material 10 is flush with the upper surfaces of the base 2 and the structural drawing 5 as structural materials. Stop work.

  Thereby, as shown in FIG. 2C, each plate-like heat insulating material 10 is airtightly inserted between the structural materials in a state of being flush with the surface of the structural material, and the floor heat insulating construction is completed. Each inserted plate-like heat insulating material 10 has a posture in which the bottom surface side is supported by the stretched sheet material 6, and the sheet material 6 functions as a suspension material, so that it is sure to fall downward. To be blocked.

  When the thickness of the plate-like heat insulating material 10 is d, the stretch rate P (%) at the time of tensile break of the stretchable sheet material 10 is P1 (%) = (L + d × 2) / L × 100. By using the above (Formula 1), the above-described pressing operation of the plate-shaped heat insulating material 10 can be easily performed without causing the plate-shaped heat insulating material 10 to be damaged. Furthermore, the elongation P (%) at the time of tensile fracture is not less than P1 (%) and P2 = (L + d × 2 + h × 2) / L × 100 (Equation 2) or less. It is possible to reliably prevent the plate-like heat insulating material 10 from dropping down below the structural material, and it can be easily inserted into a predetermined position between the structural materials in a stable state.

Next, some experimental examples conducted by the inventors as examples will be described. Sekisui Plastics Co., Ltd. “ES Dunmat Nedaless Thickness 20, 90, 150, 250, 300 mm (made of polystyrene foam)” was used as the plate-like heat insulating material 10. The compressive strength for ES Danmat Nedaless was 8 N / cm ² when measured according to JIS A9511 (foamed plastic heat insulating material). Further, as a sheet material 6 having stretchability, “Diastretch N50, N75, N100, S100 (manufactured by low density polyethylene sheet)” was used. As shown in Tables 1 and 2, the elongation percentage P (%) at the time of tensile fracture was 120%, 140%, 170%, and 500%, respectively. The elongation P (%) at the time of tensile fracture was measured in accordance with JIS K6251 (vulcanized rubber and thermoplastic rubber-how to determine tear strength). The elongation P (%) at the time of tensile fracture is a value represented by the following formula.
Elongation rate P (%) at tensile break = (Ls / L0) × 100
However, Ls: dimension when the specimen is cut, and L0: initial dimension of the specimen.

  The experiment was performed using the floor structure shown in FIG. Further, for each experiment number, the above-described P1 = (L + d × 2) / L × 100 (%) and P2 = (L + d × 2 + h × 2) / L × 100 (%) were calculated, 1 and 2.

  The width e (mm) of the central portion of the heat insulating plate is the horizontal width of the central portion in the thickness d direction of the heat insulating plate having the cross-sectional shape shown in FIG. It is equal to the distance x (= L−w) between the pull 5 and the large pull 5 and is approximately equal to (bottom width a + top surface width b) / 2.

  In addition, in the insertability in Tables 1 and 2, ◎ indicates that the workability is suitable, and ○ indicates that the sheet material is excessively stretched and attention was required to push down the plate-like heat insulating material during the construction. ing.

[Evaluation]
In Experiment No. 1-1, a thickness of 20 mm for ES Danmat Nederless as a plate-like heat insulating material, 90 mm in thickness for ES Dunmat Nedarless as a plate-like heat insulating material, and Dia Stretch N50 as a sheet material is attached. Manually inserted between the structural members. In Experiment Nos. 1-1 and 1-2, the plate-like heat insulating material stopped between the structural materials, and the workability was good. In Experiment No. 2-1, a thickness of 90 mm for ES Danmat Nederless, and in Experiment No. 2-2, a thickness of 150 mm for ES Dunmat Nederless was manually inserted between structural members to which Diastretch N75 was attached. In both experiment numbers 2-1 and 2-2, the plate-like heat insulating material stopped between the structural materials, and the workability was good. In Experiment No. 3-1, a thickness of 250 mm for ES Danmat Nederless, and in Experiment No. 3-2, a thickness of 300 mm for ES Danmatt Nedarless was manually inserted between structural members to which Diastretch N100 was attached. In both experiment numbers 3-1 and 3-2, the plate-like heat insulating material stopped between the structural materials, and the workability was good.

  In Experiment No. 4-1, the thickness of ES Dan Mat Nederless is 20 mm, in Experiment No. 4-2 is 150 mm of thickness for ES Dan Mat Nederless, in Experiment No. 4-3 is 300 mm of thickness for ES Dan Mat Nedarless. Manually inserted between the attached structural materials. In Experiment Nos. 4-1 and 4-2, if the sheet material is not properly inserted, the sheet material may extend too much and the plate-shaped heat insulating material may not stop between the structural materials. I was able to stop in between. In Experiment No. 4-3, the plate-like heat insulating material stopped between the structural materials, and the workability was good.

  In Experiment No. 5-1, the thickness of ES Dunmat Nederless is 20 mm, in Experiment No. 5-2, the thickness of ES Dan Mat Nederless is 150 mm, in Experiment No. 5-3, the thickness of ES Dunmat Nederless is 300 mm. Manually inserted between the attached structural materials. In Experiment Nos. 5-1, 5-2, and 5-3, if the sheet material is not inserted carefully, the sheet material may extend so much that the plate-shaped heat insulating material may not stop between the structural materials. The material could be stopped between the structural materials.

  From the above, as an elastic sheet material, the elongation P (%) at the time of tensile fracture is P1 (%) = (L + d × 2) / L × 100 (where L: between the centers of adjacent structural materials) , D: thickness of the plate-like heat insulating material), and the elongation P (%) at the time of tensile fracture is not less than P1 (%), and P2 = (L + d × 2 + h × 2) / L × 100 (%) or less was found to be more preferable.

2,5 ... foundation, large drawing (structural material),
6 ... Elastic sheet material,
10: A plate-like heat insulating material made of synthetic foam resin.

Claims (7)

A heat insulating construction method for a building in which a synthetic insulating resin plate-like heat insulating material is arranged between structural materials,
Placing the stretchable sheet material so as to cross all of the structural material located in the section where the synthetic foam resin plate-like heat insulating material should be placed;
Fastening the arranged stretchable sheet material to at least a structural material located on both side edges of the compartment;
Pushing the plate-like heat insulating material made of the synthetic foamed resin between adjacent structural members from above the fastened elastic sheet material;
A heat insulation construction method for a building, characterized by comprising at least The construction according to claim 1, wherein the stretchable sheet material uses a material having an elongation P (%) at the time of tensile fracture equal to or higher than P1 (%) calculated by the following formula (1). Insulation construction method for things.
Formula (1): P1 (%) = (L + d × 2) / L × 100
However, L: The distance between the centers of adjacent structural materials, d: The thickness of a plate-shaped heat insulating material. The stretchable sheet material is characterized in that an elongation P (%) at the time of tensile fracture is not less than P1 (%) and not more than P2 (%) calculated by the following formula (2). The heat insulation construction method to the building of Claim 2 to do.
Formula (2): P2 = (L + d × 2 + h × 2) / L × 100
Where L: distance between the centers of adjacent structural materials, h: height of the structural material, d: thickness of the plate-like heat insulating material.   A plate-like heat insulating material made of polystyrene-based foam resin is used as the plate-like heat insulating material made of synthetic foam resin, and a polyolefin-based resin sheet material or a polyvinyl chloride-based resin sheet material is used as the stretchable sheet material. The heat insulation construction method to the building as described in any one of Claim 1 thru | or 3 to do.   5. The heat insulation construction method for a building according to any one of claims 1 to 4, wherein the structural material is a floor joist or a large pull in a wooden building. A heat insulating structure of a building in which a plate-like heat insulating material made of synthetic foam resin is arranged between structural materials,
Expansion and contraction that crosses the entire structural material located in the section where the plate-like heat insulating material made of synthetic foam resin is disposed and is integrally fastened to the structural material located at least on both side edges of the compartment A sheet material,
The plate-like heat insulating material made of the synthetic foamed resin inserted between adjacent structural members by pushing from above the fastened elastic sheet material,
A heat insulation structure for a building, characterized by comprising:   The heat insulating structure for a building according to claim 6, wherein the structural material is a floor joist or a large pull in a wooden building.

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