JPH042096B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention uses fire-retardant plastic foam with an aluminum/galvanized steel plate as the core material as the surface material, and integrates a fire-retardant sheet material as the back material to conduct quasi-nonflammability tests (surface test, box test). This is a siding board (hereinafter simply referred to as a board) that is lightweight, has high heat insulation properties, and is highly productive. This kind of board, which has been used conventionally, has a surface material made of a thin metal plate, such as an aluminum plate or a colored steel plate, formed into a concave shape, with male and female connecting parts formed on the left and right side walls, and a polyurethane foam or polyisocyanurate foam on the back side. , phenol foam, etc., and its exposed surface is covered with a backing material made of a sheet-like material. however,
For this type of board, semi-flammability test (JIS-A-1321)
Although it passed the surface perforation test, it had a drawback that it could not pass the box test. This was due to flashover during the box test. In particular, the biggest cause of this is that decomposition gas from the core material plastic foam leaks directly from the joint into the box test where the crib is located, causing flashover, and the surface material deforms under high heat. This was due to the lack of heat radiation. In order to eliminate these drawbacks, the present invention makes it difficult for the decomposed gas of the plastic foam under test to leak from the joints, and even if it does leak, it leaks gradually to prevent flashover. , by strengthening the heat radiation from the surface material itself and the engagement force of the joints, and by composing the plastic foam and backing material with fire-retardant materials, the surface meets the quasi-inflammability test (JIS-A-1321).
We propose a board that can pass the perforation test and the additional box test. An embodiment of the board according to the present invention will be described in detail below with reference to the drawings. Figures 1 a to c are perspective views showing an example of the above-mentioned board, and 1 is a surface material formed from an aluminum-zinc alloy plated steel plate (hereinafter simply referred to as steel plate) as shown in Figures 2 a and b. It mainly functions as a fireproofing material, a mold material, a rust prevention material, and a heat radiating material. As for the material, the plating amount is 55 to 45 aluminum content in terms of weight ratio.
%, zinc 43.4 to 95%, and additives 1.6 to 0.1%. Its specific shape is shown in Figure 2b.
As shown in the figure, a long decorative surface 2 and side walls 3, 4 formed by bending both edges parallel to the longitudinal direction inward.
A main body portion 5 having a concave cross section and a side wall 3,
4, male and female connecting portions 6 and 9 are respectively formed at the lower ends thereof. To explain further, the decorative surface 2 is made of one of flat, chip-shaped metal, or a structure in which ceramic is adhered. The male connecting portion 6 is formed from an insertion edge 7 extending outward from the lower end of the side wall 3 and a reinforcing piece 8 extending inward from the side wall 3 by folding its tip back inward. Furthermore, the female connecting part 9 includes an insertion groove 10 which is bent inwardly into a U-shape at the lower end of the side wall 4, an extension part 12 whose lower edge 11 is protruded outwardly, and a reinforcing part whose tip is bent outward. , rain return, tongue piece 13 for adding elasticity to the connection part, and extension part 12
It consists of a protrusion 14 formed parallel to the side wall 4 in the middle. In particular, the insertion groove 10, the tongue piece 13,
The dimensions of the protrusion 14 are based on the connection structure of board A and the joint part B.
The setting is based on the spacing, fireproofness, and waterproofness. In addition, the dimensions of the surface material 1 are the width of the decorative surface 2.
W ₁ is the width of the insertion edge 7, W ₂ is the width of the protruding part extending inward from the side wall ₃ , W ₄ is the width of the reinforcing piece 8, and W ₅ is the width from the side wall 4 to the tongue piece 13. , the width from the side wall 4 to the innermost part of the insertion groove 10 is W ₆ , the width from the innermost part of the insertion groove 10 to the tongue piece 13 is W ₇ , and the height of the insertion edge 7 from the decorative surface 2 is h ₁ , the height from the decorative surface 2 to the surface of the reinforcing piece 8 is _h2 , the height from the decorative surface 2 to the upper side of the insertion groove 10 is _h3 , and the height from the decorative surface 2 to the lower edge 11 is
h ₄ , the height of the tongue piece 13 is h ₅ , the height of the protrusion 14 is h ₆ ,
Assuming that the opening height of the insertion groove 10 is h ₇ , the height between the surface of the reinforcing piece 8 and the lower edge 11 is h ₈ , and the thickness of the surface material 1 is t, W ₁ = 200 to 450 mm, W ₂ ≦ W ₅ , W ₃ ≒ W ₄ −W ₂ ,
W ₇ ≒ W ₅ + W ₆ , W ₇ = W ₂ + W ₃ , or W ₃ + W ₆
+ΔW, t=0.27~1.6mm, h ₁ ≦h ₂ , h ₄ = h ₃ + h ₆ +
t, h ₅ = 1 to 3 mm, h ₆ ≒ 2 to 3.5 mm, h ₇ = h ₄ − h ₃ +
t, h ₈ =h ₄ −(h ₁ +t). 15
is made of plastic foam having fire retardant properties, and is integrally formed by discharging a molded body and a raw material onto the main body portion 5, and mainly has fire retardant properties, heat insulating properties, and adhesive properties. Specific examples include polyisocyanurate foam, phenol foam, silicone-containing foam, modified polyurethane foam, and materials to which one or more of long and short glass fibers, silicone, pearlite grains, mica, asbestos, carbon fiber, and borax are added. It is. Also, the thickness H of the plastic foam 15
is equivalent to h ₄ . Reference numeral 16 is a backing material which has fire retardant properties and covers the exposed surface of the plastic foam 15, and also protects the plastic foam 15 from being exposed to high heat.
The board A is reinforced by being stretched between the surface 8b and the lower edge 11 of the reinforcing piece 8 to suppress leakage of decomposed gas to the outside. Specific examples include asbestos paper, glass fiber sheets, and metal foils (Al, Fe, Cu).
It is a laminate of one or more of the following. Of course, this type of backing material can also be treated with a net-like material, waterproofing treatment, and fireproofing treatment. Next, an example will be described. Now, a board A as shown in FIG. 1c is fixed to a rim C through nails D as shown in FIG. 3, and the interval ΔW between the joints B is set to 7 mm. Therefore, the surface material 1 is a 0.35 mm color steel plate, the plastic foam 15 is a polyisocyanurate foam with a density of 50 kg/m ³ and a thickness H of 15 mm, and the back material 16 is asbestos paper laminated with 20 micron aluminum foil. This is what I did. In addition, the dimensions of surface material 1 are W ₁ = 356 mm, W ₂ = 21 mm,
W ₃ = 15mm, W ₄ = 36mm, W ₅ = 21.6mm, W ₆ = 14mm,
W ₇ = 35.6mm, h ₁ = 11.5mm, h ₂ = 13mm, h ₃ = 11.5mm,
h ₄ = 15mm, h ₅ = 2mm, h ₆ = 1~3mm, h ₇ = 3.5mm,
h ₈ =2 mm. Further, as a comparative example, the reinforcing piece 8 of the surface material 1 was removed, the plastic foam was the same as in the example, and the back material was made of asbestos paper. Therefore, a surface test and a box test were conducted on both boards, and the results shown in Tables 1 and 2 were obtained.

【table】

【table】

[Table] What has been described above is only one embodiment of the board according to the present invention, and a surface material may be formed or a caulking material 17 may be planted as shown in FIGS. 4a to 4p. As described above, according to the board according to the present invention,
Since a steel plate is used as the surface material and a fire-retardant plastic foam is used as the core material, it has the characteristic of passing semi-flammability tests (surface test, box test). Furthermore, the manufacturing process is almost the same as before, and the plastic foam is made of a single product or a similar material, and has excellent features that can improve productivity and reduce costs. In addition, the board features greatly improved strength, waterproofness, and engagement force. Further, even when a board is formed from plastic foam by molding or by injection, the surface material functions as a molding material, making it easy to form the foam.

[Brief explanation of drawings]

Figures 1 a to c are perspective views showing an example of the siding board according to the present invention, Figures 2 a and b are perspective views showing the surface material, which is the main part thereof, and Figure 3 is a perspective view showing the connected state of the board. Explanatory drawings and FIGS. 4a to 4p are explanatory drawings showing other embodiments of the surface material. DESCRIPTION OF SYMBOLS 1 ... Surface material, 6 ... Male type connection part, 8 ... Reinforcement piece, 9 ... Female type connection part, 15 ... Plastic foam, 16 ... Back material.

Claims (1)

[Claims] 1 In a siding board that is integrally filled with fire-retardant plastic foam between the front and back materials, an aluminum/galvanized steel plate is used as the surface material, and this is used as a long decorative surface and a longitudinal side of the decorative surface. A main body portion having a concave cross section formed by a side wall with both side edges parallel to the direction inwardly bent, and male and female connecting portions are formed on the left and right sides of the side wall, and the plastic is formed of a fire-retardant foam. A siding board characterized in that the exposed surface of the foam is integrally formed by covering the exposed surface with a backing material made of a sheet-like material having fire retardant properties.