JPH0475334B2 - - Google Patents

Description

[Detailed description of the invention]

In the present invention, a hollow part is formed from a partition plate made of a thin metal plate and a metal foil, and a fire-retardant plastic foam is integrally fixed to the back side of the hollow part, and a semi-flammable test (surface test, box test) and a fire-retardant structure test are carried out. In addition to being able to pass the test, it is also lightweight, has insulation properties, productivity,
Economical and strong siding board (hereinafter referred to as
(simply referred to as the board). This type of board, which has been conventionally used, has a surface material made of a thin metal plate formed into a concave shape, with male and female connecting parts formed on the left and right side walls, and the back side of the board is filled with polyurethane foam, polyisocyanurate foam, phenol foam, etc. The exposed surface is then covered with a backing material made of a sheet-like material. However, this type of board is subject to semi-flammability test (JIS-
Although it passed the surface test in A-1321), it had a drawback that it could not pass the box test and fire protection structure test (JIS-A1301 wooden base grade 2). This is due to flashover in the box test and backside temperature of 260℃ in the fire protection structure test.
That's all it was supposed to be. In particular, in the box test, because plastic foam was used as the core material, heated gas spewed out from the joints, resulting in flashover, and in the fireproof structure test, the temperature rise on the back side of the joints was the biggest weakness. In order to eliminate such drawbacks, the present invention forms a hollow part with a backing material and a partition plate made of metal foil, and integrally attaches a fire-retardant plastic foam to the back side of the partition plate, so that it can be heated under high heat. This paper proposes a board that can pass quasi-noncombustibility tests and fireproof structure tests by lowering the temperature due to air flow within the hollow space, forming a heat insulating layer, and significantly reducing the absolute amount of plastic foam. An embodiment of the board according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing an example of the above-mentioned board, and 1 is a surface material made of a thin metal plate, such as a surface-treated steel plate, a stainless steel plate, a galvanized steel plate, a galvalume steel plate, or an aluminum plate, which is shown in FIG. It was molded as shown. That is, the surface material 1 consists of an elongated decorative surface 2 and side walls 3, 4 parallel to its longitudinal direction with both side edges bent inward, and a main body 5 formed with a concave cross section and the lower ends of the side walls 3, 4. It is composed of formed male and female connecting parts 6 and 9 , and mainly functions as a fireproofing material, a decorative material, a reinforcing material, a molding material, a noncombustible material, and a waterproofing material. That is, the decorative surface 2 has a surface structure such as a flat plate, an embossed pattern, or a chip attached thereto. Further, the male type connecting part 6 is formed by bending the lower end of the side wall 3 outward, and is formed by a protruding insertion edge 7 and a tongue piece 8 whose tip is bent into a seam shape, and the female type connecting part 9 The lower end of the side wall 4 is bent inward in a U-shape to form an insertion groove 10, the lower edge 11 of the insertion groove 10 is bored outwardly, and the tongue piece 13 is bent outward. It consists of a protrusion 14 formed in parallel with the side wall 4 in the middle. especially,
As shown in FIG. 3, the dimensions of the insertion groove 10, tongue piece 13, and protrusion 14 are set in accordance with the connection between the boards A, the spacing between the joints B, and fire prevention and waterproofing.
Note that the dimensions of the surface material 1 are, for example, the width of the decorative surface 2.
W ₁ , the width of the insertion edge 7 is W ₂ , the width from the side wall 4 to the tongue piece 13 is W ₃ , the width of the insertion groove 10 is W ₄ , the insertion groove 10
The width from the innermost part to the tongue piece 13 is W ₅ , the height of the side wall 3 is h ₁ , the height of the side wall 4 is h ₂ , and the shape of the insertion groove 10 is
h ₃ , the height of the tongue piece 13 and the protrusion 14 are h ₄ , h ₅ , the height from the back surface of the decorative surface 2 to the lower edge 11 is h ₆ , the surface material 1
When the thickness of the plate is t, W ₁ = 180 to 450 mm, W ₂ ≧
W ₄ , W ₃ = W ₅ −W ₄ , h ₁ < h ₆ , h ₁ < h ₂ , h ₃ = 2~
3.5 mm, h ₄ and h ₅ = 2 to 3 mm, and h ₆ = h ₂ + h ₃ . A partition plate 15 is made of metal foil and is fixed by spot welding, adhesive, etc. between the back surface of the insertion edge 7 and the back surface of the extension part 12, and mainly serves to reinforce the surface material 1 and to Together with the partition plate 15, a hollow portion 16 is formed which serves as a heat insulating layer.
In particular, the hollow portion 16 serves as a heat insulating layer and a ventilation path, as well as a protective layer for the plastic foam 17 in the event of a fire. The shape of the partition plate 15 may be a flat plate, or as shown in FIG. 2, a stepped portion 16a may be formed in the middle to adjust the height difference _h7 between the insertion groove 7 and the extension portion 12. It is. Specific examples of the partition plate 15 include iron foil, aluminum foil, etc., with a thickness of about 0.1 to 0.3 mm. To explain further, the partition plate 15 forms the hollow part 16 and also functions as a mounting surface for the plastic foam 17, so if the plastic foam 17 is a molded object, it can be stably mounted in manufacturing. , plastic foam 1
When 7 is foamed and molded from raw materials, the foam can be easily molded. In addition, the hollow part 16 normally functions as an air flow path to prevent dew condensation, and in the event of a fire, prevents the fire from coming into direct contact with the plastic foam 17. 17, thereby making it possible to strengthen fire protection. Reference numeral 17 is a plastic foam (hereinafter simply referred to as foam) having fire retardant properties, heat insulating properties, and, if necessary, self-adhesive properties, and is formed by, for example, a molded body or an injection method in which raw materials are discharged. Specific examples include polyisocyanurate foam, phenol foam, silicone-containing modified polyurethane foam, and in addition to these, long and short glass fibers, perlite, mica, asbestos,
1 containing one or more of carbon fiber, borax, etc.
It consists of seeds. Note that when using phenol foam, it is preferable to apply a paint or adhesive that improves adhesiveness to the back surface of the partition plate 15. Also, the plate thickness H of the form 17 is 5
~20 mm, width W ₆ = W ₁ + W ₃ − W ₈ . In addition, the width
W ₈ is the length from the side wall 3 to the stepped portion 16a.
18 is a backing material that covers the exposed surface of the form 17, such as asbestos paper, glass fiber sheet, vinyl chloride sheet, metal foil (Al, Fe,
It consists of one or more types of Cu), and a sheet-like material with a net-like material, waterproofing treatment, and fireproofing treatment added thereto. Reference numeral 19 is a recessed part where the form from the insertion edge 7 to one side wall of the form 17 is cut out, and is mainly used to provide a relief when connecting the board A and form a continuous heat insulating layer with the form 17. It is something. Next, an example will be described. Surface material 1 is a colored steel plate with a plate thickness of 0.27 mm, W ₁ =
360mm, W ₂ = 20mm, W ₃ = 20mm, W ₄ = 13mm, W ₅
= 33mm, W ₆ = 357mm, W ₇ = 33mm, h ₁ = 8mm, h ₂
=7mm, _h3 =3.5mm, _h4 , _h5 =2mm, _h6 =10.5mm,
h ₇ =2.5 mm, the foam 17 was discharged in raw form onto the back side of the partition plate 15, and the exposed surface was laminated with 20 micron aluminum foil on asbestos paper. Also, form 17 is 14.5mm,
The width Δt of the joint B between the boards A is 7 mm. In addition, as a comparative example, a board was formed by discharging polyisocyanurate foam onto the main portion of the surface material 1 and laminating the above-described back material 18 thereon. Therefore, we conducted surface tests, box tests, and fire protection tests on both boards, and the following results were obtained.

【table】

[Table] What has been described above is only one embodiment of the board according to the present invention, and the board can be formed as shown in FIGS. 4a to 5e and 5a to 5c. Note that 21 is a caulking material and 20 is a sheet. As described above, according to the board according to the present invention,
Since a hollow part is formed with the surface material and the partition plate, it usually prevents condensation on the back of the decorative surface, and in the event of a fire, the plastic foam is cooled by the air flow in the hollow part, and the board using the foam can pass quasi-nonflammability tests. It has characteristics that allow it to pass box tests and fire protection tests. In addition, manufacturing is easy because plastic foam is placed on a partition plate, or raw materials are discharged and foamed and molded, which allows for mass production. Furthermore, the heat insulation properties, strength, and corrosion resistance are greatly improved compared to before, and there is no cost increase.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of the siding board according to the present invention, Fig. 2 is a perspective view showing the surface material which is the main part, Fig. 3 is an explanatory view showing the connected state of the board, Fig. 4 5A to 5E are sectional views showing other examples of the surface material, and FIGS. 5A to 5C are explanatory views showing other examples of the siding board. 1 ... Surface material, 2... Decorative surface, 3, 4... Side wall, 5 ... Main body part, 6 ... Male type connecting part, 7... Insert edge, 9 ... Female type connecting part, 10... ...Insertion groove, 11
... lower edge, 12 ... extension part, 13 ... tongue piece, 14
... tongue piece, 15 ... partition plate, 16 ... hollow part,
17...Plastic foam, 18...Back material.

Claims (1)

[Claims] 1 A main body portion 5 having a concave cross section is formed from an elongated decorative surface 2 and side walls 3 and 4 in which both side edges parallel to the longitudinal direction of the decorative surface 2 are bent inward, and one of the side walls 3 and 4 is The lower ends of one side wall 3 are bent outward to provide a male connecting portion 6 that protrudes and forms an insertion edge 7, and the other side wall 3
The lower end is bent inward and then outward to form a horizontal U-shaped cross section to form the insertion groove 10, and its lower edge 11 is extended outward to form an extension portion 12. A surface material 1 provided with a protrusion 14 parallel to the side wall 4 in the middle and a female connecting portion 9 having a tongue piece 13 bent in a flap shape at the tip of an extension portion 12, and an insertion of the surface material 1 . A partition plate 15 made of metal foil of 0.1 mm or more is pasted between the edge 7 and the extension part 12 to form a hollow part 16 surrounded by the main body part 5 and the partition plate 15, and the partition plate 15 is pasted on the back side of the partition plate 15. A siding board characterized in that it is integrally formed with a plastic foam 17 having fire retardant properties.