JPS5921205Y2 - architectural composite board - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a composite board for construction that has excellent water and fire resistance, is durable, and is extremely easy to construct.

Conventionally, various types of exterior boards for houses and the like have been known, and for example, composite boards made of plywood with a finishing mortar layer formed on the upper surface are often used.

However, if it is made mainly of plywood, it is inferior in water and fire resistance, and if thick gypsum board is used to improve water and fire resistance, it will naturally increase in weight and have poor workability. There was a problem.

In view of these points, this invention aims to provide a simple construction board that is lightweight and at the same time has sufficient water and fire resistance, and also improves workability on site. It is.

The details of this invention will be explained below with reference to the attached drawings.

As shown in the perspective view of FIG. 1 and the longitudinal cross-sectional view of FIG. This is a composite board formed by laminating and bonding with an adhesive 13, and by slightly shifting the bonding of the lower plate 11 and the upper plate 12, the bonding step portion 10a and the bonding step portion 10b are formed on the edge of the board 10. It was formed.

A lightweight plywood board is used for the lower plate 11, and a gypsum board, which is inexpensive and has excellent fire resistance, is used for the upper plate 12. In the example, the thickness of the lower plate 11 is 4 to 5 mm, and the thickness of the upper plate 12 is 4 to 5 mm.
is approximately 9 mm.

For joining the lower plate 11 and the upper plate 12, an adhesive having good water and fire resistance and having the following composition is used.

Sodium silicate 25% Asbestos cement 25% (Hard cement) Water 50% Silon (volume expansion agent) Small amount The laminated stepped portion 10a and the laminated stepped portion 10b are made by sequentially laminating the composite board 10 according to this invention. It is formed for convenience in implementation, and is preferably formed in the shape of a hook as shown in the figure.

Then, the bonding stepped portion 10a (this is usually the part where the lower plate 11 is exposed, but it may also be the exposed back surface of the upper plate 12).

) is coated with a joint filler 15. The joint plate 15 may be made of a commonly used caulking agent mainly composed of coal tar or the like, and is preferably covered with a release paper 16 or the like as shown in FIG.

Furthermore, a finishing mortar layer 14 is formed on the upper surface of the upper plate 12.

This mortar layer 14 is finished in a scratch-like manner as shown in the figure, and has the following composition, for example.

The mortar layer 14 having the above-mentioned composition has excellent water and fire resistance and is difficult to peel off, making it ideal as a finishing layer.

FIG. 3 is a cross-sectional view of the main parts showing the bonded state of the composite board 10. Stepped portion 10'
Pasting is possible by simply overlapping the parts b.

At the same time, since the joint filler 15 is applied to the entire surface of the bonded stepped portion 10a, an extremely good joint effect is obtained, unlike the case where the joint filler is applied only to the normal surface area.

In the composite board of this invention with the above structure, a lower plate made of a lightweight plywood board is laminated with a lower plate made of gypsum board with excellent water and fire resistance using a water and fire resistant adhesive, and the upper plate is attached to the top surface of the upper plate. In addition, a finishing mortar layer with excellent water and fire resistance is formed, so the durability against external moisture, fire, etc. is significantly improved.

In addition, by shifting and joining the upper and lower plates,
Forming a laminating stepped portion and a laminated stepped portion at the edge of the board,
In addition to making it convenient to perform lamination on site, by applying a joint agent to the laminated step, the joint effect of the board lamination area is fully achieved and moisture intrusion from the outside is prevented. The practical merits of the architectural composite board according to this invention are extremely large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the composite board for construction according to this invention, Fig. 2 is a vertical cross-sectional view at the center thereof, and Fig. 3 is a sectional view of the main parts showing the state in which the composite board is bonded. . DESCRIPTION OF SYMBOLS 10... Composite board, 10a... Lamination step part, 10 b... Lamination step part, 11...
...Lower plate, 12...Top plate, 13...Water and fireproof adhesive, 14...Finishing mortar layer, 15
・・・・・・Gluting agent.

Claims (1)

[Scope of utility model registration request] A lower board 11 made of plywood board and an upper board 12 made of gypsum board of approximately the same size are laminated together using a water- and fire-resistant adhesive 13, and the lower board 11 and the upper board 12 are shifted and joined, so that the edge of the board A bonding step 10a and a bonding step 10b are formed, a joint sealant 15 is applied to the bonding step 10a, and a finishing mortar layer 14 is applied to the upper surface of the upper plate.
An architectural composite board characterized by forming: