JPH0318576Y2 - - Google Patents

Description

[Detailed explanation of the invention] In recent years, cement mortar layer on wooden substrate,
Alternatively, mortar-based plywood on which a cement mortar layer containing various aggregates is formed has been devised, and has come to be widely used as a labor-saving member in wet construction methods.

The present inventors have also devised a construction base material in which a cement mortar layer containing foamed synthetic resin particles is formed on a wooden substrate with a waterproof layer interposed between them, and it is being used at construction sites and in the market as a labor-saving component for wet construction. It has received high praise.

This base material is a base material that is sufficient to omit the intermediate coat and top coat and apply a finishing coat such as Rishin gun spraying or emulsion Rishin spraying.
Labor-saving construction work is becoming more and more popular.

Furthermore, since a cement mortar layer containing foamed synthetic resin particles is formed on the wooden substrate, increasing the thickness of the cement mortar layer results in an almost dry base that is superior in terms of weight and workability. It is used as a material member.

However, although the thicker the cement mortar layer is, the better its performance as a base material will be, but if the structure is deformed by various external forces, it will not be able to follow the deformation, and cracks and A problem has arisen in that cracks occur.

The present invention was made to solve the above problems, and its purpose is to interpose a waterproof layer on a wooden substrate, and a cement mortar layer containing foamed synthetic resin particles on the top surface. Regarding the construction base material, which is characterized in that the cement mortar layer is provided with grooves filled with an elastic sealant, by applying only a finishing material such as Rishingun spraying or Studco spraying. The purpose of the present invention is to provide a base material for construction that can complete a mortar-coated outer wall and has excellent workability and labor saving.

Hereinafter, the architectural base material according to the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing an enlarged cross-section of a base material for construction according to the present invention.

In this construction base material, a wooden substrate 1 such as plywood, hardboard, particle board, etc. with a thickness of 4 to 12 mm is used as the substrate.

A waterproof layer 2 is formed on this wooden substrate 1. The waterproof layer 2 is formed using a coating device such as a roll coater using a resin used in a coating film waterproofing method, such as an acrylic resin, a butyl rubber resin, an ethylene vinyl acetate resin, or the like.

A cement mortar layer 3 is formed on the upper surface of the waterproof layer 2. This cement mortar layer 3 is a mixture of foamed synthetic resin particles 3a such as polystyrene or polyurethane and an inorganic material such as cement. The cement mortar layer 3 is formed on the waterproof layer 2 to a desired thickness using a knife coater or the like.

If the foamed synthetic resin particles 3a contained in the cement mortar layer 3 have a diameter of about 1 to 10 mm, even better results can be obtained in terms of the performance of the base material and the workability of cutting, nailing, etc.

The groove 4 has a V-shaped groove extending upwardly and extending in the longitudinal direction of the building base material. At least one groove 4, so-called a plurality of grooves 4, are arranged at predetermined intervals.

To form the grooves 4, the grooves 4 are usually formed by placing a V-shaped material on the waterproof layer 2, forming the cement mortar layer 3, and then removing the material. 3 may be formed on the upper surface of the waterproof layer 2, and then a groove shape may be cut using a V-shaped cutting jig.

Further, the lower end of the groove 4 from above, that is, the depth, is to be placed on the upper surface of the waterproof layer 2 or within the waterproof layer 2, and must not reach the wooden substrate 1.

The groove 4 thus formed is filled with an elastic sealing material 5. As the elastic sealing material 5,
In addition to common sealants such as oil-based, synthetic rubber, acrylic, butyl rubber, urethane, polysulfite, and silicone, we also use relatively elastic sealants such as asphalt and ethylene vinyl acetate (EVA). A waterproof material is used.
FIG. 2 is an enlarged cross-sectional view of another embodiment of the construction base material according to the present invention.

The wooden substrate 1 has a thickness of 5 to 7 mm, as described above.
A thick substrate or a structural wood substrate is used.

Further, the waterproof layer 2 is also provided with a synthetic resin waterproof material similar to that shown in FIG.

Furthermore, a cement mortar layer 3 is formed on top of the waterproof layer 2. As described above, the cement mortar layer 3 is a mixture of foamed synthetic resin particles 3a and an inorganic material 3b such as cement.

What differs from the embodiment shown in FIG. 1 is the shape of the groove 4. This groove 4 has a substantially U-shaped cross section. Furthermore, as described above, the grooves 4 are formed by placing a U-shaped material on the waterproof layer 2 in advance.
The grooves may be formed by forming the cement mortar layer 3 and then removing the mold material, or by cutting the cement mortar layer 3 into a U-shape with a cutting jig. 4 may be formed.

Moreover, the lower part of the groove 4 is not allowed to reach the wooden substrate 1 from the waterproof surface.

Then, the groove 4 is filled with an elastic sealing material 5. As shown in FIG. 3, this filling may be done at a level lower than the surface 3c of the cement mortar layer 3, so that the surface 3c of the mortar layer 3 and the surface 5a of the sealant 5 do not have to match, and there are recesses 6 that are not filled. may be formed. By doing so, it is possible to take advantage of the design of the grooves within the panels and create a three-dimensional exterior wall finish.

This elastic sealing material 5 may be of the same quality as the elastic sealing material used in the previous embodiment.

In the above description, the grooves 4 are provided in the longitudinal direction of the building base material, but the present invention is not limited to this, and may be provided, for example, in the lateral direction of the building base material.

As described above, the construction base material according to the present invention has a waterproof layer 2 interposed on a wooden substrate 1, and a cement mortar layer 3 containing synthetic resin foam particles 3a is formed on the waterproof layer 2. Cement mortar layer 3
Since the groove 4 is filled with an elastic sealant 5, the elastic sealant 5 filled in the groove 4 absorbs the dimensional change due to moisture absorption and desorption of the wooden substrate 1, and the base material This will greatly contribute to overall dimensional stability.

Furthermore, since the grooves 4 are formed at predetermined intervals, even if the wooden substrate itself is deformed vertically and horizontally, the cohesive force generated inside the cement mortar layer 3 can be alleviated, thereby preventing deformation of the base material. It can be prevented as a whole.

Furthermore, by driving the nails along the grooves, the conventional drawback of water leaking from the nail holes is also eliminated. moreover,
For waterproofing the joint part of the base material, it is possible to create a joint with the same shape as the groove, so the joint part is less noticeable and has many advantages, such as being good in terms of waterproofing.

As explained above, the present invention requires only the finishing material to be applied as a base material for mortar compared to the conventional method, which greatly reduces labor in the wet work process.
Furthermore, since the cement mortar layer contains foamed synthetic resin particles and is formed thickly on the wooden substrate, it has excellent heat insulation and sound insulation properties. It is lightweight, and the adhesion of exterior finishing materials and construction efficiency such as cutting and nailing are also extremely good.

Further, since grooves are provided in the cement mortar layer at appropriate intervals and the grooves are filled with an elastic sealant, local external stress generated in the cement mortar layer is absorbed by the elastic sealant.

Therefore, the cement mortar layer does not have any cracks or cracks, making it an extremely excellent base material even when used as a rain cover.Also, even if an exterior material is applied or sprayed on top of this base material, no cracks will occur. It has many advantages both physically and economically.

[Brief explanation of the drawing]

Figure 1 is an enlarged cross-sectional view showing the V-shaped grooves formed in the cement mortar layer in the construction base material according to the present invention, and Figure 2 is the construction base material according to the present invention. FIG. 3 is an enlarged cross-sectional view showing a state in which a U-shaped groove is formed in the cement mortar layer in the construction base material according to the present invention. FIG. 2 is an enlarged cross-sectional view showing a state in which a DESCRIPTION OF SYMBOLS 1... Wooden substrate, 2... Waterproof layer, 3... Cement mortar layer, 4... Groove, 5... Elastic sealing material, 6... Recessed part.

Claims (1)

[Scope of utility model registration request] A waterproof layer is interposed on the wooden substrate, and a cement mortar layer containing foamed synthetic resin particles is formed on the waterproof layer, and the cement mortar layer includes a waterproof layer that does not reach the upper surface of the waterproof layer or the inside of the waterproof layer that does not reach the wooden substrate. 1. A construction base material, characterized in that a plurality of grooves having a depth of .