JP2578240Y2 - Fireproof partition wall - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin and lightweight fire-resistant partition wall.

[0002]

2. Description of the Related Art Conventionally, a fire-resistant partition wall used for a building has a structure in which an inorganic molded plate 2 such as a gypsum board or a calcium silicate plate is stuck to the surface of a stud 1 as shown in the figure. Widely used.

[0003]

[Problems to be Solved by the Invention] By the way, such a fire-resistant partition wall can be easily broken in a fire,
Holes should not be formed by the impact of a dropping fire or the like, but the inorganic molded plate 2 such as a gypsum board or a calcium silicate plate has excellent heat insulating properties, but is exposed to a flame. There is a problem that the plate body is easily cracked due to shrinkage or explosion due to rapid release of contained water. For this reason, in the refractory partition wall having the above-described structure, the inorganic molded plate 2 is first adhered to the stud 1 as the under adhesive material 2a, and further on the under adhesive material 2a, in order to secure the necessary fire resistance performance. It is common to use a multilayer structure in which the upper bonding material 2b is stacked and bonded. Therefore, this kind of refractory partition wall has a drawback that the whole thickness becomes thick and its weight becomes heavy. For example, in the case of using a gypsum board for the inorganic molded plate 2,
As illustrated in FIG. 4, the thickness of the inorganic molded plate is laminated (2
t) becomes 40 mm or more, and is stuck on both sides of the stud 1, so that the total thickness (L ₁ ) is 150 mm
It will be of the order. For this reason, a lot of labor is required for construction, and there is a problem that space efficiency and usability are also inferior. The present invention has been made in view of such circumstances, and has a fire-resistant partition wall having a structure in which an inorganic molded plate such as a gypsum board or a calcium silicate plate is adhered to both sides of a stud, thereby deteriorating its fire resistance performance. It is an object of the present invention to reduce the labor required for construction by reducing the overall thickness and the weight without reducing the thickness.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a fire-resistant partition having an inorganic molded plate such as a gypsum board or a calcium silicate plate adhered to both sides of a stud. Characterized in that a coating layer formed by applying a foaming refractory paint on the surface of the film is formed. Further, the foamable refractory paint for forming the coating layer according to the present invention is characterized in that the foamed carbonized heat insulation layer is formed at a temperature of 250 ° C to 350 ° C and the paint expands 30 to 50 times. .

[0005]

According to the present invention, when the refractory partition wall is exposed to a flame, the foamable refractory paint applied to the surface of the inorganic molded plate foams and expands to form a carbonized heat insulating layer, thereby causing a fire. Sometimes, the inorganic molded plate is protected from the flame, and even if one inorganic molded plate is used, the impact resistance is not reduced and no crack is generated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory cross-sectional view of a fire-resistant partition wall according to the present invention, which is partially crushed. In addition, the same members as the conventional
The description is given with the same reference numerals. Reference numeral 1 denotes a conventionally used stud having a U-shaped cross section, 2 denotes an inorganic molded plate attached to both sides of the stud 1, and 3 denotes a foamed refractory paint applied to the surface of the inorganic molded plate 2. It is the clothing layer formed by the above. There are various types of foaming fire-resistant paints or foaming fire-resistant paints having different foaming temperatures and foaming ratios. The foaming ratios used in the present invention are as large as 30 to 50 times and 250 ° to 50 °. Preferably, a foamed carbonized layer is formed at 300 ° C. to prevent rapid release of water contained in the inorganic molded plate. For example, a resin emulsion for paint such as polyvinyl acetate or acrylic resin to which ammonium phosphate is added as a foaming agent, and a flame retardant, a filler and the like are added is used. However, the present invention is not limited to this as long as it has the above-described effects, and can be used as appropriate. A coating thickness of the foaming refractory paint of several mm is sufficient, and usually 0.5 to 3.5 mm is appropriate. For this reason,
The thickness of the entire refractory partition wall can be reduced and the weight can be reduced. Next, a specimen A (see FIG. 1) obtained by the present invention and a specimen B (see FIG. 2) obtained by a conventional method.
And the specimen C (see FIG. 3). That is, the specimen A is a gypsum board having a thickness of 20 mm, which is used as the inorganic material forming plate 2, and is stuck on both sides of a U-shaped iron stud 1, 1 having a thickness of 65 mm and a thickness of 10 mm arranged at intervals of 455 mm. The foamable refractory paint was spray-coated on the surface of the board so that the thickness after drying was 1.5 mm. JIS-A130 from one side of the obtained specimen A
As a result of heating for 60 minutes by a heating method based on No. 4 (fire resistance test method for building structural part), the temperature on the back side did not exceed 260 ° C. Also, in the impact test, a 10 kg eggplant-shaped bell was dropped from a height of 1 m on the heated surface after heating for 30 minutes, and as a result, no through hole reaching the back surface was formed. The specimen B was a gypsum board having a thickness of 20 mm as the inorganic material forming plate 2 and attached to both sides of a 65 mm thick and 10 mm thick steel stud 1, 1 having a U-shaped cross section arranged at intervals of 455 mm. JIS from one side of the obtained specimen B
As a result of heating for 60 minutes by a heating method in accordance with -A1304, cracks occurred in the gypsum board on the heated surface side, and the maximum temperature on the back surface exceeded 260 ° C. Further, the specimen C has a thickness of 2
Using a gypsum board of 0 mm as the inorganic forming plate 2, 45
65 mm thick and 10 mm thick at 5 mm intervals
Was attached to both sides of iron studs 1 and 1 having a U-shaped cross section as a lower adhesive material 2a, and a gypsum board having a thickness of 20 mm was further applied as an upper adhesive material 2b. As a result of heating for 60 minutes from one side of the obtained specimen C by a heating method in accordance with JIS-A1304, a crack was generated in the upper surface material on the heated side, but the temperature on the back side exceeded 260 ° C. Did not. Also, in the impact test, no through hole reaching the back surface was formed. As is clear from the above results, the specimen B
It can be seen that although the thickness L is the same as the thickness of the specimen A, it is not suitable as a fireproof wall. The specimen C
Has the same effect as the specimen B, but the thickness is L ₁
> L, which goes against the reduction in thickness and weight.

[0007]

[Effects of the Invention] As described above, according to the present invention,
The surface of the inorganic molded plate is coated with a foaming refractory paint to form a coating layer. For this reason, at the time of fire, this foaming refractory paint can foam and expand to form a carbonized heat insulating layer, and the inorganic molded plate is protected from the flame,
As in the comparative example of the fire resistance test described above, even with one inorganic molded plate, the impact resistance does not decrease and no crack occurs. Therefore, it is not necessary to provide a base material as in the related art, and the thickness of the entire fire-resistant partition wall can be reduced in thickness and weight. In addition, since the foamable refractory paint also plays a role as a surface finish coating, the appearance is improved, and the labor required for the construction is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a partially broken illustration of a fire-resistant partition wall according to the present invention.

FIG. 2 is an explanatory view of a specimen B of a fire-resistant partition wall manufactured by a conventional method.

FIG. 3 is an explanatory diagram of a specimen C of a fire-resistant partition wall manufactured by a conventional method.

FIG. 4 is a partially broken perspective view showing a conventional example of a fire-resistant partition wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stud 2 Inorganic molded board 2a Underlying board 2b Overlying board 3 Foaming refractory paint coating layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E04B 1/94 E04B 2/00 E04B 2/74

Claims (2)

(57) [Scope of request for utility model registration] 1. Gypsum board or silica on both sides of the stud
Fire resistance by sticking inorganic molded plate such as calcium acid plate
In partition walls, the refractory partition wall and providing a coating layer formed by coating a foamable refractory coating on the surface of the inorganic molded plate. 2. The foamable refractory paint for forming a coating layer comprises 2
The fire-resistant partition wall according to claim 1, wherein the coating is a paint that forms a foamed carbonized heat insulating layer at a temperature of 50C to 350C and expands 30 to 50 times.