JP2000120228A - Metal plate roofing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sheathing roof board from matching fire even when its surface side burns by fire spread during a fire by forming roofing material by fixing heat insulation incombustible material on the rear surface of a resin- coated metal plate. SOLUTION: A metal plate roofing material is formed by affixing via an adhesive a rock wool-formed plate being heat insulation incombustible material having a thickness of, e.g. 15 mm on the rear surface of a vinyl acetate resin- laminated steel plate having no coating in its rear surface; subsequently, this is placed on a sheathing roof board being inclined at a predetermined angle with respect to the horizontal direction. Even when the surface resin of the resin-laminated steel plate burns by fire spread or the like during a fire, since a heat of the metal plate or its radiant heat is interrupted by the rock wool- formed plate affixed to its rear surface, the roof board can avoid becoming so high temperature that it catches fire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the field of fire when a roof is covered with a metal sheet on a field board, even if the metal sheet is made of a resin-coated metal sheet which is not a non-combustible material. For hard-to-cover metal sheet roofing materials.

[0002]

2. Description of the Related Art Generally, a metal-plated roof of a house is constructed by directly laying a metal plate on a field board, but the metal plate to be used must be made of a non-combustible material. Standard Law Article 22). Here, the non-combustible material is a test (surface test, base material test) specified in Notification 1828 of the Ministry of Construction.
And includes a plated steel plate, a coated metal plate, a thin-film-thick resin laminated metal plate, and the like. For this reason, in the case of a normal metal-plated roof, even if a nearby fire causes a spark, the roof plate does not burn and the field plate does not ignite.

[0003] By the way, a metal-plated roof slab is attracting attention in recent years as a roof having an earthquake-resistant structure because it is light in weight and there is no danger of the metal plate dropping due to vibration. However, even if the metal plate made of a noncombustible material is coated with a resin such as coating or resin lamination, there is a limit on the thickness that can be made thick, and the coating film is poor in three-dimensional appearance. For this reason, roofs that were roofed with noncombustible metal plates were poor in design. In addition, when the coating film deteriorates, repair painting must be performed, so repair costs are higher than tiles and slate roofs, and the appearance after repair is inferior to that at the beginning of construction.

[0004] In view of this, it has been considered to use a resin-coated metal sheet having a thick coating film, which is not legally a non-combustible material, but whose burning does not ignite the field board as a roof panel. . That is, if the coating film of the resin-coated metal plate is made thicker, large irregularities can be provided on the coating film, so that the three-dimensional appearance is increased, and the durability of the coating film is also improved. The period up to can be lengthened. However, there was no resin-coated metal sheet which did not correspond to a conventional non-combustible material, and ignition of the field board was not recognized by combustion.

In some houses in heavy snowfall areas, an electric heater is fixed to the surface of a roof covered with a metal plate made of a noncombustible material with an adhesive or a double-sided tape to prevent the snow from being piled on the roof. Melting has been done to eliminate the need to remove snow,
If the resistance wire is exposed, the electric heater may cause disconnection or leakage, and its corrosion resistance is inferior. Therefore, it has been studied to protect the surface by coating the entire surface with an insulating resin, usually with a considerable thickness. ing. In recent years, due to growing environmental issues, an integrated roofing material has been developed in which a solar cell is coated on a metal plate surface with a durable thick transparent insulating resin film, and construction on the roof has been studied. I have. However, when the metal sheet roof is coated with the insulating resin in this way, the metal sheet of the roof is not a non-combustible material. Therefore, when the insulating resin is burned, the spread of the fire or the ignition of the field board becomes a problem.

[0006]

SUMMARY OF THE INVENTION The present invention provides a metal sheet roofing material which does not fall under non-combustible materials, and which does not ignite even when used as a roofing sheet constructed on a field board. is there.

[0007]

The metal sheet roofing material of the present invention is characterized in that a resin-coated metal sheet whose surface is coated with a resin, and a heat-insulating noncombustible material is fixed to the back surface of the resin-coated metal sheet. .

[0008]

When the roof is roofed with the resin-coated metal sheet of the present invention,
If the back side is installed on the side of the base plate, even if the resin on the surface of the metal plate burns, the heat of the metal plate and its radiant heat are blocked by the heat insulating non-combustible material fixed to the back surface, so the base plate is ignited. It does not get so hot. Here, a resin-coated metal plate that does not correspond to a noncombustible material means a metal plate that does not pass the test specified in the Ministry of Construction Notification No. 1828,
It is determined by the film thickness and the like.

The metal plate of the resin-coated metal plate may be a flat plate or a molded plate. The heat-insulating non-combustible material preferably has a heat conductivity of about 0.1 Kcal / m · hr ° C. or less, for example, a molded plate such as rock wool or glass fiber. For fixing the heat-insulating noncombustible material to the metal plate, the metal plate is exposed and an adhesive, preferably a heat-resistant adhesive, is used, a method of holding both sides of the heat-insulating noncombustible material with a formed metal plate, a formed metal plate. And a method of wrapping the heat-insulating non-combustible material.

[0010]

EXAMPLE 1 FIG. 1 shows a metal sheet roofing material A according to the present invention.
(mm), a 15 mm-thick rockwool molded plate 3 is fixed to the back surface of the plate through an adhesive layer 2. The vinyl acetate resin laminated steel sheet 1 is provided with a vinyl acetate resin layer 6 on the surface of a galvanized steel sheet 4 with a primer layer 5 interposed therebetween. The thickness of the vinyl acetate resin layer 6 is 400 μm, It does not correspond to.

This roofing material A is placed on a base plate 7 inclined at 30 degrees with respect to the horizontal direction, and two pieces of wood 8 (about 530 g) ignited on the roofing material A are shown in FIG. After being partially put on as shown in, the fan 9 burns while sending a wind at a wind speed of 3 m / sec, and the flames cover the surface of the roofing material A downwind, and a fire resistance test is performed. Ignition of the ground plate 7,
Burning was observed (according to ISO 12468). As a result, the vinyl acetate resin layer 6 of the roofing material A started burning about 1 minute after the wood piece 8 was put thereon. And the piece of wood 8 is about 13
The combustion was terminated in minutes, but the vinyl acetate resin layer 6 continued burning for about 3 minutes thereafter. However, even when the burning of the vinyl acetate resin layer 6 was completed, the base plate 7 was not ignited.

FIG. 3 shows another metal sheet roofing material B according to the present invention.
At one end in the width direction, a groove-shaped engaging portion 11 protruding to the front side is formed, and at the other end, the groove-shaped engaging portion 1 protruding to the back side is formed.
1a is provided. On the back side, an electric heater 12 is fixed to the coated steel sheet 10 by an adhesive or a double-sided tape, and the entire surface is further covered with a polyester resin sheet 13 having a thickness of 100 μm. It is. On the other hand, a glass fiber nonwoven fabric 14 having a thickness of 10 mm is fixed to the back side via an adhesive layer 2.

As shown in FIG. 4, the roof material B is engaged with a roof board 7 inclined at 30 degrees with respect to the horizontal direction on both sides in the width direction, as shown in FIG. Put on
The same fire resistance test as in Example 1 was performed. as a result,
In the case of the roofing material B, the polyester resin sheet 13 starts burning about 2 minutes after the wood piece 8 is put thereon, and the wood piece 8 becomes about 1
The fire was extinguished in 3 minutes, but the embers of the polyester resin sheet 13 continued burning for about 1 minute. However, even when the burning of the polyester resin sheet 13 was completed, the base plate 7 was not ignited.

[0014]

As described above, since the metal sheet roofing material of the present invention has a heat insulating non-combustible material fixed to the back surface even if it does not correspond to a non-combustible material, even if the front surface is burned by a spark, etc. , The ground plate does not ignite.

[Brief description of the drawings]

FIG. 1 is a sectional view of a metal sheet roofing material of the present invention.

FIG. 2 is a view showing a method of testing for a fire resistance of the metal sheet roofing material shown in FIG. 1;

FIG. 3 is a sectional view of another metal sheet roofing material of the present invention.

FIG. 4 is a view showing a method of testing for a fire resistance of the metal sheet roofing material shown in FIG. 3;

[Description of sign]

 A Metal sheet roofing material of the present invention B Other metal sheet roofing material of the present invention 1 Vinyl acetate resin laminated steel sheet 2 Adhesive layer 3 Rockwool molded plate 4 Galvanized plate 5 Primer layer 6 Vinyl acetate resin layer 7 Field plate Reference Signs List 8 wood piece 9 fan 10 painted steel plate 11, 11a groove-shaped engaging portion 12 electric heater 13 polyester resin sheet 14 glass fiber non-woven fabric

Continued on the front page F term (reference) 2E108 AZ01 BN02 CV03 CV06 FF01 GG10

Claims (1)

[Claims] 1. A metal sheet roofing material comprising a resin-coated metal sheet whose surface is coated with a resin, and a heat-insulating non-combustible material fixed to the back surface of the resin-coated metal sheet.