JPH0414575Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a construction panel, and particularly to a construction panel used as an interior partition wall.

[Conventional technology]

It is a method that has been used since ancient times to attach panels to the framework of buildings and place them next to each other to create partition walls and divide rooms. In this case, the panels to be installed are prefabricated near the construction site or at a specialized factory, and then transported and erected to form the wall. Conventionally, the most commonly used types are precast concrete plates, which are made by placing a framework such as reinforcing bars in a formwork and pouring concrete into it, lightweight foam concrete plates, which are made by pouring foamed concrete into a framework such as reinforcing bars, and plaster with a foaming agent added to the formwork. There was light gypsum board, etc. mixed in and poured into the mold. However, since precast concrete plates are made of a dense material with few air bubbles, they have a hard surface and the strength of the panels is high, but they naturally have the disadvantage of being heavy. Also, lightweight foamed concrete boards and lightweight gypsum boards are advantageous because they are lightweight due to the air bubbles inside them, but their surface hardness is low and they inevitably become rough, making them weak against external pressure and prone to scratches. easy.

As a solution to such problems, Tokko Akira
Architectural panels are known as disclosed in No. 49-4736. This architectural panel consists of a center layer made of lightweight concrete, a fiber layer such as glass fiber applied on both sides, an adhesive layer provided on both outsides of the fiber layer, and a precast concrete layer on both sides. It is made up of panels. However, this construction panel requires the step of applying an adhesive layer to bond the precast concrete panel to the layer of lightweight concrete. Furthermore, it is difficult to apply adhesive so that it fills the microscopic spaces in the fiber layer used as a reinforcing material and protrudes inward and outward, which may cause the precast concrete panel to separate from the lightweight concrete in the center layer. .

[Problem that the invention attempts to solve]

The problem to be solved is that conventional construction panels require a layer of adhesive to bond the precast concrete panel to the center layer of lightweight concrete, which complicates the manufacturing process and increases costs. And, there is a risk that the precast concrete panel will separate from the center layer due to poor adhesion.

The object of the present invention is to provide a lightweight and strong architectural panel that does not require an adhesive layer, has inner and outer layers tightly integrated, and is lightweight and strong.

[Means to solve the problem]

The architectural panel according to the present invention has a lightweight foam layer made of an inorganic material sandwiched between a dense surface layer made of gypsum or gypsum slug on both sides in a sandwich-like manner, and a large number of punched holes are formed between the lightweight foam layer and the dense surface layer. It is characterized by interposing a non-woven fabric having the above-mentioned structure, and a part of the surface dense layer is integrated into the lightweight foam layer through punched holes.

To explain further, first, a dense layer of paste-like inorganic material made of gypsum or gypsum slag is poured into a mold, a thin nonwoven fabric with many punched holes is placed on top of that, a lightweight layer of foamed inorganic material is poured on top of that, and then If a thin non-woven fabric similar to that described above is placed and then a dense layer is further poured as a paste of an inorganic material, each layer will be relatively flat to form three sand german layers.

Moreover, the inserted thin nonwoven fabric is located between the poured dense surface layer and the foamed lightweight layer, and a portion of the dense surface layer bites into the lightweight layer, which not only prevents separation of both layers, but also causes both to become cluttered. It acts as a kind of separator to prevent mixing with other substances.
Furthermore, when considering a large-sized panel board, the thin non-woven fabric embedded in the dense layers on both surfaces becomes a reinforcing material that increases the bending strength applied to the panel, and not only increases the rigidity of the panel itself, but also increases the stiffness of small particles that easily form on the surface. It also serves as a core material that helps prevent cracks. The thin nonwoven fabric that becomes this perforated sheet must be more easily eaten than both the dense layer on the surface and the lightweight foamed layer, but since the nonwoven fabric has many punched holes, the result is very good. is obtained. Depending on the panel you are looking for, if you make the surface dense layer thinner and increase the foam lightweight layer in the center, you will get a product with low specific gravity, or if you thicken the surface dense layer and reduce the center layer, you will get a product with relatively high specific gravity and high rigidity. Panels are freely available.

〔Example〕

The high-strength architectural panel of the present invention will be described below with reference to FIGS. 1 to 3, while comparing it with a conventional example. The main constituent inorganic material of the panel of this invention can be gypsum, slug gypsum, etc., but here we use gypsum, which is easy to process and hardens quickly, and the reinforcing material to be embedded inside is a thin non-woven fabric made of synthetic fibers, with holes punched as appropriate. Here are some examples.

FIG. 2 shows a gypsum board 1 that has been reduced in weight by mixing a foam material using a conventional method, and when a portion A of the board is enlarged, minute closed cells 2 are scattered within the gypsum board 1. If a large number of air bubbles 2 are added in order to make the plaster panel lighter, the wall thickness of the plaster between the air bubbles will become thinner and the strength will be significantly weakened.If a lightweight aggregate 10 such as perlite, shirasu balloon, vermiculite, etc. is also used, this drawback can be overcome. It can be significantly improved. 9 is a reinforcing metal mesh.

In the present invention, as shown in Fig. 1, an unfoamed surface dense gypsum layer 4 is first poured into a mold 3, and then a thin non-woven fabric 5 made of synthetic resin having a large number of punched holes 6 as shown in Fig. 3B is immediately placed. Then, a foamed lightweight plaster 7 mixed with a lightweight aggregate 10 is poured thereon. Next, a thin nonwoven fabric 5 made of synthetic fibers as shown in FIG. 3B is placed on the lightweight plaster 7, and finally a surface dense layer of plaster 4 is poured. If necessary, α-gypsum with high strength may be used for the surface dense gypsum layer 4.
If foamed gypsum using a foaming agent is used together with lightweight aggregate for the lightweight foam layer in the center, the effect will be even greater and a panel with greater strength can be obtained.

In the gypsum panel thus obtained, the unfoamed gypsum layer 4 partially penetrates into the thin nonwoven fabric 5 made of synthetic fibers, so that the nonwoven fabric 5 is embedded in the gypsum layer 4. The lightweight foamed gypsum layer 7 poured from above penetrates from the back side like the surface gypsum layer and covers both the gypsum layers 4 and the nonwoven fabric 5.
7, it is wrapped up and integrated at the same time. Also non-woven fabric 5
Since there are punchings 6 scattered throughout, both gypsum layers 4 and 7 are also integrated through these holes. The panel in which the nonwoven fabrics 5, 5 are embedded and integrated into both plaster layers has the strength of the synthetic fiber nonwoven fabric, which applies tensile force to the surface layers 4, 5 on the opposite side against bending loads. Strong against lateral pressure. In addition, 8 indicates a net,
It is also possible to use a net 8 instead of the nonwoven fabric 5.

According to the present invention, by embedding a nonwoven fabric having a large number of punched holes as a reinforcing core material in the portions close to both surface layers of the panel, it is possible to increase the strength and still make processing extremely easy. Moreover, the surface layer made of gypsum or gypsum slag and the internal lightweight foam layer can be closely integrated into a sandwich structure, resulting in a lightweight and strong architectural panel.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing the poured state of the construction panel of the present invention, Figure 2 is a perspective view of a conventional construction panel that is entirely foamed, A is a diagram showing the foamed state of a part of it, and Figure 3 Figures A and B are perspective views of two embodiments of panel reinforcement. 2... Air bubbles, 3... Formwork, 4... Surface dense layer,
5... Non-woven fabric, 6... Punched holes, 7... Lightweight foam layer, 8... Net, 9... Metal mesh, 10... Lightweight aggregate.

Claims (1)

[Scope of utility model registration request] A lightweight foam layer made of an inorganic material is sandwiched on both sides by a dense surface layer made of gypsum or gypsum slag in a sandwich pattern, and a nonwoven fabric having many punched holes is interposed between the lightweight foam layer and the dense surface layer. A construction panel made by integrating a portion of a dense layer into a lightweight foam layer through punched holes.