JPS6232306B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat insulating structure for an outer wall portion of a building or structure.

Recently, external insulation of buildings, etc. has been attracting attention for reasons such as energy saving, and various configurations, such as those shown in FIG. 1, have been proposed. That is, main pillar A
The gap between the stud B and the interior base plate C is filled with mineral fibers such as glass wool, rock wool, and asbestos.
A structure is known in which a siding material E, which is a composite of a metal plate and a heat insulating material, is nailed on top of which a furring D is nailed. However, as is clear from this figure, the connecting parts of the metal siding material E act as thermal bridges, and there are 5 to 10 such connecting parts per 180 cm length, and they are formed vertically between the eaves and the foundation. Ru. Therefore, since this part acts as a thermal bridge, the insulation performance of the entire wall is significantly reduced, for example, to 1/3 to 1/10 of the original insulation performance of the insulation material, and there is no water intrusion from the connection points. However, there were drawbacks such as shedding due to condensation, which is fatal to glass wool insulation materials due to water vapor passing through them.

In order to eliminate such drawbacks, the present invention integrates members with high heat insulation properties, waterproof properties, and low moisture permeability on the main pillars, studs, or rims of the frame, and provides a large-sized structure with an area of approximately 1800 x 900 mm. To provide an external wall insulation structure with improved high insulation properties, waterproofness, dew condensation prevention, and workability by forming a metal siding material on top of the structure and nailing a metal siding material thereon.

EMBODIMENT OF THE INVENTION Below, one Example of the outer wall heat insulation structure based on this invention is described in detail using drawings. FIG. 2 is an explanatory diagram showing a part of the external wall insulation structure of a building, etc. according to the present invention, where 1 is a main column, 2 is a stud, 3 is an interior base plate, 4 is a rim, and 5 is a large base plate. It is. The main pillars 1, studs 2, and rim 4 are collectively referred to as the frame. To explain further, the dimensions of the large base plate 5 are
Use 1800mm (length) x 900mm (width). The above-mentioned large-sized base plate 5 is commercially available, and in a building structure where the unit is 1800 mm, 1 tsubo can be finished by installing two plates, so it is highly efficient. More specifically, the large-sized base plate 5 is a composite plate having an integral structure in which a synthetic resin foam 6 is sandwiched between a hard base material 7 and a sheet-like material 8. The synthetic resin foam 6 has a low moisture permeability (for example, 0.00001 to 0.005 g/
mhrmmHg), low water absorption of approximately 5% or less, and high thermal insulation properties, such as thermal conductivity of 0.017 to 0.05 kcal/mh.
℃ polyurethane foam (rigid), polyisocyanurate foam, phenol foam, polyethylene foam, polystyrene foam, etc., with a high closed cell ratio, for example, 50% or more, usually about 90%. In addition, the hard base material 7
The material is plywood or waterproof plywood, which functions as a reinforcing material and a flat mounting surface for a metal siding material to be described later, and the sheet-like material 8 is a synthetic resin film with excellent waterproof and moisture-proof properties, such as a polyethylene sheet, These include asbestos paper and kraft paper, which are also hygroscopic, aluminum foil, which is waterproof, moisture-proof, and heat-reflective, and one type of waterproof asphalt felt, or a sheet-like product made by laminating two or more of these sheet-like products. Reference numeral 9 denotes a metal siding material, which has the shape shown in FIGS. 3a to 3c, for example. That is, as a typical example, a thin metal plate 10 is bent to form a male connecting part 11, side walls 12, 13, an insertion groove 14, and an extension part 1, as shown in Figure A.
5, a heat insulating material 16 filled in a concave portion formed with a concave cross section, and a back material 17 provided as necessary. In addition, as shown in figure b, a protrusion 12a is provided to prevent the heat insulating material 16 from falling off, and as shown in figure c, the heat insulating material 1
A heat insulating layer formed on the back surface of the insertion groove 14 and the extension portion 15 is also used.

The above-mentioned heat insulating material 16 is a heat insulating material made by bonding and integrating inorganic hollow particles such as the synthetic resin foam, pearlite grains, and shirasu balloons with an adhesive, and a heat insulating material made of mineral fibers such as rock wool and glass wool formed into a plate shape. Use. Further, as the back material 17, the same member as the sheet-like material described above is used.

Next, an example will be explained.

Interior base plate 3...Large gypsum board base plate 5...Waterproof plywood (9 mm thick) Aluminum kraft paper polyisocyanurate foam (15 mm) Metal siding material 9 in which the above three components are integrally formed using the self-adhesive properties of polyisocyanurate foam. … Makabe (product name of IG Industries Co., Ltd.) t ₁ = 12 mm, t ₂ = 105 mm, t ₃ = 30 mm, t ₄ = 25 mm, t ₅ =
15mm, joint width W = 7.6mm, L = 360mm The heat transmission coefficient of the entire structure above is 0.674kcal/m ² h
℃, and the heat transmission coefficient of the part due to t ₄ and t ₅ is
It was 0.76 kcal/m ² h°C.

Further, no dew condensation was found, there was no water absorption or moisture absorption by the heat insulating materials 6 and 9, and the large base plate blocked rain and wind from entering through the joints. On the other hand, when the above-mentioned true wall is directly nailed to the rim 4, only the iron plate part, which is a good conductor, is present at each joint, and rain and wind enter through this joint. In particular, it was observed that wind tends to circulate to some extent.

Therefore, the error in the actual measurement value was large, and for reference, it was approximately 1.3 kcal/m ² h°C.

What has been described above is only one embodiment of the outer wall heat insulation structure according to the present invention, and the structure shown in FIGS. 4a to 4d may also be used. That is, figure a shows a structure in which the trunk rim 4 is removed and the hard base material 7 is used as a reinforcing material and a mounting material for the metal siding material 9, and figure b shows a structure in which the synthetic resin foam 6 is formed with unevenness or compressed during installation. This shows the case of a heat-insulating structure with reduced space.
Furthermore, a waterproof layer 18 may be provided as shown in FIGS. 4b and 4c. Moreover, as shown in FIG.

As described above, according to the external wall insulation structure according to the present invention, since a large base plate is used on the frame, which has excellent heat insulation and waterproof properties and functions as a reinforcing material and a mounting surface material for metal siding materials, it is easy to prepare the base. It is extremely easy and highly efficient. Since the metal siding material is installed on the installation surface where the large base plate has been constructed, the low insulation, moisture proof, and low waterproof properties of the joints between the metal siding materials are significantly improved, and the wall itself has excellent insulation and dew condensation resistance. will improve. Since the insulating material of the large base plate itself has elasticity, springback acts at each nailing and contacting part, creating a more airtight mounting structure and strengthening the waterproofness and air impermeability of the entire wall.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a conventional external wall insulation structure, Fig. 2 is a cross-sectional view showing an example of an external wall insulation structure according to the present invention, and Figs. 3 a to c show an example of metal siding. The perspective views and FIGS. 4a to 4d are explanatory diagrams showing other embodiments. 1...Main pillar, 5...Large base plate, 9...Metal siding material.

Claims (1)

[Claims] 1. On the main pillars, studs, frame, etc., a sheet of large base plate made by sandwiching a synthetic resin foam with a hard base material and a sheet material is nailed in contact with the main frame, and both ends are attached on top of it. 1. An external wall heat insulating structure, characterized in that the outer wall has a connecting structure, and an outer surface layer is formed by connecting narrow metal siding materials whose cross-sectional concave portions are filled with a heat insulating material.