JPH11107403A - Fire-resistant panel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the fire-resistant capacity of a joint by butting mutual side faces of a plurality of sheets of panels in which both side faces of a foamed sheet of polyvinyl chloride mixed with inorganic materials are covered with plaster boards and filling an inorganic heat-resistant expansible material in the gap between foamed sheets of the joints. SOLUTION: This panel is constituted of a polyvinyl chloride foam sheet 21 mixed with an inorganic material, a plaster board 22 covering both inside and outside faces of the foam sheet, and a mortar adhesive 23 sticking the foam sheet 21 to the plaster board 22. A clearance 26 is formed between mutual foam sheets 21 in the joint 8 of the panel and an inorganic heat-resistant expansible material 27 is filled in the clearance 26. When the external wall is heated, the foam sheet 21 is thermally contracted and the clearance is widened and a gap is brought. And at the same time, the expansible material 27 is expanded to fill the gap. And hence, transfer of the heated air from the heated side to the non-heated side is blocked, in the external wall and the temperature of the non-heated side is prevented from rising and the fire-resistant capacity of the joint 8 is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire-resistant panel structure suitable for use on an outer wall of a building.

[0002]

2. Description of the Related Art In a fire-resistant panel structure disclosed in Japanese Patent Application Laid-Open No. 4-353140, a heat insulating core layer is formed of a foam comprising an inorganic filler and a vinyl chloride resin. It is covered with a refractory material layer such as gypsum board. Mortar is filled in the gap between the joints between the panels.

[0003]

The above-mentioned known panel comprises:
In a fire resistance test in which the surface temperature becomes 925 ° C. or higher, the foam may shrink, and a gap may be formed in the joint portion filled with mortar. If a gap is formed, hot air or flame may pass through the gap from the heated side of the panel to the non-heated side, causing the temperature inside the non-heated area to rise to a specified value or more. Increasing the thickness of the refractory layer in order to avoid such a situation not only increases the material cost, but also makes the panel heavier, making the installation work for this panel increasingly difficult.

Therefore, an object of the present invention is to improve the fire resistance performance of a joint portion in a fire-resistant panel structure.

[0005]

According to the present invention for solving the above-mentioned problems, a plurality of panels each formed by covering both sides of an inorganic-mixed vinyl chloride foam sheet with a gypsum board are arranged side by side. On the premise of a fire-resistant panel structure, an inorganic heat-resistant expansion material is filled between the foam sheets of the joint portion formed by the butted side surfaces.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a fire-resistant panel structure according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view of a building outer wall 2 in which a fire-resistant panel structure 1 is used. Exterior wall 2
Is composed of a panel structure 1 composed of a plurality of panels 1A, and a plurality of steel plates 3 covering the outer surface of the panel structure 1. The panel 1A is attached to the body edge 7 of the C-shaped channel via a tapping screw 6, and the adjacent panel 1A
The joints 8 are formed by abutting the side surfaces. In the figure, a T-shaped joiner 9 is in contact with the joint portion 8 extending in the vertical direction from inside the panel 1. Although the entire shape of the steel plate 3 is not shown, the steel plate 3 is rectangular, and covers the panel structure 1 from the outside in a state where edges of adjacent ones and side edges overlap by a required dimension. Tapping screw 11
To the panel 1A and the body edge 7.

FIG. 2 is a sectional view taken along the line II-II of FIG. Panel 1A covers an inorganic mixed vinyl chloride foam sheet 21 formed by heating and foaming a mixture of inorganic particles such as calcium carbonate, magnesium carbonate, and talc, a vinyl chloride resin, and a foaming agent, and covers both the inner and outer surfaces of foam sheet 21. It has a gypsum board 22 and a mortar adhesive 23 interposed between the foam sheet 21 and the gypsum board 22 and joining these two 21 and 22. The foam sheet 21 is made small so as to be located at a required size, for example, about 1 to 1.5 mm inside from the periphery of the gypsum board 22. In the joint portion 8 of the panel 1A, a clearance 26 of about 2 to 3 mm is provided between the foam sheets 21.
There is. The clearance 26 is filled with an inorganic heat-resistant expansion material 27, more preferably, a heat-resistant expansion material 27 having elastic compression recovery at room temperature. The T-shaped joiner 9 inside the joint portion 8 is sandwiched between the panel 1A and the body edge 7.

The outer wall 2 constructed as described above can withstand a one-hour fire resistance performance test among the non-bearing walls of the fire-resistant structure specified in the Notification No. 2999 of the Ministry of Construction, 1969, Appendix 1. . In order to satisfy the fire resistance performance, in the fire-resistant panel structure 1, as the foam sheet 21, for example, a foam containing a vinyl chloride resin as disclosed in JP-B-62-56113 and JP-B-64-4992. More preferably, a foam containing 5 to 30% by weight of a vinyl chloride resin and having a thickness of 20 mm or more is used. As the gypsum board 22, a gypsum board having a thickness of 9.5 mm or more, which is equal to or higher than the semi-incombustible class, is used. As the mortar adhesive 23, for example, one having a weight ratio of cement to calcium carbonate of 1: 1 is used at a rate of about 300 g / m ² . The inorganic heat-resistant expansion material 27 filled in the joint portion 8 includes:
For example, a material in which vermiculite and inorganic fibers are integrated with an organic or inorganic binder, particularly one in which relatively large voids are formed between inorganic fibers to provide elastic compression recovery at room temperature is used. I do. The amount of the expanding material 27 used must be such that the foam sheet 21 can fill the voids generated by the heat shrinkage, or more. Steel plate 3 combined with fire-resistant panel structure 1
Used has a thickness of 0.4 mm or more. However, the steel plate 3 can be replaced with a steel plate having a different cross-sectional shape. The T-type joiner 9 has a thickness of 0.3
mm is used.

In the above-mentioned fire resistance performance test, when the outer wall 2 is heated, the foam 21 thermally shrinks, the clearance 26 is widened, and a new space is created. At the same time, the expandable material 27 expands to fill the space. To charge. As a result, the movement of the heated air from the heating side to the non-heating side is blocked on the outer wall 2 and the temperature rise on the non-heating side is suppressed, so that a favorable result in the fire resistance test can be obtained.

[0011] The fire-resistant panel structure 1 comprises a panel 1
When the vinyl chloride resin content of the foam sheet 21 in A is 5 to 30%, excellent fire resistance performance can be exhibited.

[0012]

In the fire-resistant panel structure according to the present invention, since the joint between the panels is filled with the inorganic heat-resistant expansion material, the panel structure is heated and the foamed sheet of the core material shrinks. However, the movement of the heated air between the inside and outside of the panel structure can be suppressed.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of an outer wall in which a fire-resistant panel structure is used.

FIG. 2 is a sectional view taken along the line II-II in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel structure 1A panel 3 Steel plate 8 Joint part 21 Foam sheet 22 Gypsum board 27 Expanding material

Claims (2)

[Claims] 1. A fire-resistant panel structure in which a plurality of panels each formed by covering both sides of an inorganic-mixed vinyl chloride foam sheet with a gypsum board are arranged side by side with each other. The panel structure, wherein an inorganic heat-resistant expansion material is filled between the foam sheets of the formed joint portion. 2. The panel structure according to claim 1, wherein one side of the panel is covered with a steel plate.