JPS6154901B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exterior wall insulation structure that improves the insulation, waterproofness, and moisture permeability of the exterior wall of an architectural structure.

Recently, external wall insulation of buildings and structures has been advocated for energy saving and other reasons. For example, a wall constructed as shown in FIG. 1 has been implemented. That is, the gap between the main pillars A, studs B, and interior base plate C is filled with mineral fibers D such as glass wool, rock wool, asbestos, etc., the rim D is nailed onto it, and metal siding material is placed on top of it. It had a structure that nailed the letter E. However, as is clear from this figure, at the connection part of metal siding material E, the metal part directly contacts the rim and forms a thermal bridge, and this connection part (joint) is 5 to 10
The place is also formed from the eaves to the foundation. Therefore,
There was a disadvantage that the heat dissipation layer was large and the heat insulating performance of the metal sanding material E was significantly reduced. Further, although the male and female connection structure of metal sanding material E is easy to install, it lacks airtightness, making it difficult to prevent wind and water vapor from entering, and sometimes rainwater may enter. Therefore, dew condensation occurred between the outer wall and the inner wall, and the wall structure had low thermal insulation properties.

In order to eliminate these drawbacks, the present invention has developed a large-sized lower block in which a member having high heat insulation, waterproofness, and low moisture permeability is integrally formed on the main pillar, studs, or rim, and is not a small block but rather a large block. To provide an exterior wall insulation structure that has a base plate, a metal siding material filled with a heat insulating material, and an air layer formed between both members to improve high heat insulation and waterproof properties, prevent condensation, and improve workability.

An embodiment of the outer wall heat insulating structure according to the present invention will be described in detail below with reference to the drawings. Figure 2 is an explanatory diagram showing a cross section of a wall part of a building, etc.
is the main pillar, 2 is the stud, 3 is the interior base plate, 4 is the rim,
5 is a large base plate. This large-sized base board 5 is a composite board with an integral structure in which a synthetic resin foam 6 is sandwiched between a hard base material 7 and a sheet-like material 8, and it provides heat insulation to the outer wall and serves as a base to which a metal siding material 9, which will be described later, is attached. It functions as a
That is, as shown in FIG. 2, the large base plate 5 has a sheet-like material 8 in contact with the rim 4 or, although not shown, directly in contact with the main pillars 1 and studs 2, and a hard base material 7 on the outdoor side of the rim 4. This is something that really sticks out. Therefore, it is possible to impart heat insulation properties to the outer wall, and to improve the packing performance between the rim 4, the main pillars 1, the studs 2, and the large base plate 5 by utilizing the elasticity of the synthetic resin foam 6. Further, the specific shape of the large base plate 5 is, for example, the shape shown in FIGS. 3a and 3b, and the standard sizes are L ₁ =1800 mm and W ₁ =900 mm. That is, in figure a, two sides of the sheet-like material 8 are protruded to form an overlapping piece 8', which functions as an overlapping part during installation, and in figure b, there is an overlapping piece 8' with one side less than the above.
It is a base plate having. Although not shown, the overlapping piece 8' may have three sides, four sides, or no overlapping piece 8' at all, if necessary. To further explain the large base plate 5, the synthetic resin foam 6 is, for example, 0.00001 to 0.0005g/
It is a foam structure with a moisture permeability of about mhrmmHg, a low water absorption rate of about 5% or less, and a closed cell ratio of about 50% or more.
Hard polyurethane foam, polyisocyanurate foam, phenol foam, which has a thermal conductivity of about 0.017 to 0.05 kcal/mh℃,
Polyethylene foam, polystyrene foam, etc. The hard base material 7 is a plastic board, plywood, waterproof plywood, etc., which functions as a reinforcing material and a flat mounting surface for a metal siding material 9 to be described later, and the sheet-like material 8 is a material having waterproof and moisture-proof properties. Excellent synthetic resin films, such as polyethylene sheets, hygroscopic asbestos paper and kraft paper, waterproof, moisture-proof, and heat-reflective aluminum foil, one type of waterproof asphalt felt, or two or more of these sheet materials. It is a sheet-like product laminated with. 9 is a metal siding material, for example, Fig. 4 a or b.
It has the shape shown in . That is, as a typical example, as shown in Fig. a, a thin metal plate 10 is bent to form a male connecting portion 11, side walls 12, 13, an insertion groove 14, an extension portion 15, a main body 16 with a concave cross section, and this main body 16 is filled. The heat insulating material 17 is formed to protrude from the back surface of the extension part 15, a back material 18 covers the back surface of the heat insulating material 17, and a gap 19. Also b
The figure shows gaps 19 provided at two protruding parts of the heat insulating material 17.
It is arranged so that it is divided into two parts. The above-mentioned heat insulating material 17 is a heat insulating material made of the synthetic resin foam, inorganic hollow particles such as perlite grains and shirasu balloons bonded together with an adhesive, and a heat insulating material made of mineral fibers such as rock wool or glass wool formed into a plate shape. Use. Further, as the backing material 18, a member similar to that of the sheet-like material 8 described above is used.

Next, an example will be explained.

Interior base plate 3...Gypsum board Large base plate 5...R25 (trade name of Nihon U-Board Kogyo Co., Ltd.) Metal siding material 9...(Hidekabe) (trade name of IG Kogyo Co., Ltd.) t ₁ = 12 mm, t ₂ = 105 mm, t ₃ = 20 mm, t ₄ = 25 mm, t ₅ = 10 mm, t ₆ = 10 mm, t ₇ = 12 mm, joint width is 5 mm, L ₂ = 256 mm, and the cross section of the structure is shown in Figure 2. The vertical cross section is as shown in Fig. 5a.

In this case, the thermal transmission coefficient of the entire structure above is:
It was 0.62 kcal/m ² h°C, and the heat transmission coefficient at t ₄ and t ₅ was 0.69 kcal/m ² h°C. Furthermore, no dew condensation phenomenon was observed, synthetic resin foam 6, insulation material 17
There was no moisture or water absorption. In addition, sufficient airtightness was obtained due to the elasticity of the synthetic resin foam 6 and the heat insulating material 17. Moreover, since the voids 19 are formed in the structure, air convection and the heat insulation properties of the double lamination can be improved.

What has been described above is only one embodiment of the external wall insulation structure according to the present invention, and the overlapping pieces 8' of the sheet-like material 8 of the large base plate 5 are placed in the joints in the shape of a colander as shown in FIG. 5b. The large base board 5 may be directly nailed to the main pillars 1 and studs 2 as shown in Fig. 6a and b, or the space between the interior base board 3 and the base board or rim as shown by the dashed line. Glass wool, perlite grains, etc.
Moisture absorbing materials such as cellulose insulation materials and silica gel 20
It can also be filled with. Furthermore, as shown in FIG. 6b, waterproof sheets 21 and 22 are interposed, respectively, to further strengthen moisture-proofing, waterproofness, and airtightness. In addition, as shown in FIG. 5b, a packing material 24 is provided in a part of the drainer 23,
9 can also be occluded at one end. Moreover, it is also possible to use a sheathing board, an insulation board, etc. instead of the hard base material 7. Also,
It is also possible to adhere the sheet-like material 8 to the surface of the hard base material 7.

As mentioned above, the external wall insulation structure according to the present invention has a large base material that is airtight, waterproof, and heat insulating, and a metal siding material that is small in size and easy to install is laminated on top of it, resulting in a heat insulation structure and waterproof structure. It has the feature of being able to reliably form a moisture-proof structure. In addition, a gap can be reliably formed between the metal siding material and the large base plate, and since air convection occurs in this gap, the structure is characterized in that no dew condensation occurs. Furthermore, the heat insulating material and synthetic resin foam have a low water absorption rate and moisture absorption rate, and because of their closed cell structure, there is no deterioration of the synthetic resin foam and the heat insulating material, and there is no risk of the insulation properties decreasing over time. It has characteristics. Moreover, since a large composite base plate is used instead of a base plate, there is an advantage that the two steps of construction and insulation construction can be performed with high efficiency using a large base plate. Furthermore, when aluminum foil is used for waterproof paper, it not only exhibits heat-reflecting properties, but also has the secondary effect of improving sound absorption due to its different laminated structure. In addition, even when metal siding materials and large base boards are nailed together, the elasticity of the synthetic resin foam and insulation material acts as a packing material, preventing rainwater and water from entering from this area, and preventing the nails from rusting. It also has the advantage of being able to prevent this.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional external wall insulation structure, FIG. 2 is a cross-sectional view showing an embodiment of the external wall insulation structure according to the present invention, and FIGS. FIGS. 5a and 5b are perspective views showing an example of a large base plate and metal siding, which are the main components of the external wall insulation structure according to the invention; FIGS. Figure 6 a, b
FIG. 3 is a cross-sectional view showing another embodiment. 1...Main pillar, 2...Stud, 4...Framing, 5...
Large base plate, 9...Metal siding material.

Claims (1)

[Claims] 1. A sheet-like material of a large base plate made by sandwiching a synthetic resin foam with a hard base material and a sheet-like material on the main pillars and studs or the rim is attached to the outdoor side of the main pillar and studs or the rim and nailed. An outer wall heat insulating structure characterized in that an outer surface layer is formed by connecting a metal siding material with a heat insulating material in a shape to form an air layer except for at least the connecting portions thereon.