JPH0551975A - Fire resisting joint bar - Google Patents

Abstract

PURPOSE:To promote fire resistance and heat insulation of a joint bar and to have the lightweight joint bar excellent in handling efficiency. CONSTITUTION:A fire resisting joint bar has a recessed groove 2 on the outside thereof, and it is constituted of a joint bar body 1 inserted between building panels and collar sections 6 projected to tooth sides from the front end of the body and covering one edge of the outside of the panels. In the joint bear connecting the building panels 8 to each other, the recessed groove is filled with inorganic silicate foam 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint rod for connecting building material panels to each other, and more particularly to a joint rod having high fire resistance.

[0002]

2. Description of the Related Art Conventionally, a joint rod as shown in FIG. 2 has been known as a joint rod for connecting building material panels to each other. That is, reference numeral 1 in the drawing is a joint bar main body made of a metal such as aluminum and having an H-shaped cross section, in which a concave groove 2 is formed on the outer surface side and a concave groove 3 is also formed on the inner surface side. A sealant 4 is filled in the inner concave groove 3. In addition, at the base end portion of the main body 1 and at a predetermined position on the tip end side that is separated from the base end portion by a predetermined distance, the collar portions 5 protruding laterally,
5, 6 and 6 are integrally provided so as to project, and building material panels 7 and 7 are respectively inserted between these flanges 5 and 6. Further, similar brim portions 8, 8 are integrally provided on the front end portion of the main body 1 so as to be spaced apart from the front brim portions 6, 6 by a predetermined distance.

[0003]

However, this type of joint bar of the prior art has a problem of poor fire resistance. Therefore, even if the building material panel is constructed with sufficient fire resistance, the joint bar will not be distributed during a fire. There is a risk of fire spread at the installation location.

The present invention has been made in view of the above circumstances.
It is an object of the present invention to provide a fire resistant joint bar having high fire resistance, heat insulation, light weight and excellent handleability.

[0005]

In order to achieve the above-mentioned object, the present invention has a joint groove main body which has a concave groove on the outer surface side and is inserted between building material panels, and on both sides from the tip side of the main body. In a joint bar for connecting building material panels to each other, which is provided with a collar portion which projects and covers one edge portion of the outer surface of the panel, the concave groove is filled with an inorganic silicate foam.

[0006]

Since the joint rod of the present invention is filled with the inorganic silicate foam in the outer concave groove, it can withstand a temperature of 600 to 980 ° C. and has extremely high fire resistance. Therefore, it is possible to prevent the fire from spreading from the joint rod in the event of a fire.

Further, since the above-mentioned inorganic silicate foam has a good heat insulating property, it also has a good effect in preventing dew condensation and is useful as a building material.

Further, the inorganic silicate foam has a specific gravity of 0.
Since it can be 9 or less, the joint bar is not significantly heavy even if it is filled in the outer concave groove, and it is easy to handle because of its light weight and excellent in workability.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Here, in the embodiment of FIG.
The same components as those of the joint bar are designated by the same reference numerals and the description thereof will be omitted.

In the embodiment of FIG. 1, therefore, in the joint rod of FIG. 2, the inorganic silicate foam 9 is provided in the outer concave groove 2.
And the cover body 10 is fitted and inserted.

The inorganic silicate foam 9 is preferably filled by filling the concave groove 2 with a self-curing foam slurry having the following composition and curing it.

That is, its composition is as follows (where% represents% by weight). Silicate 15-66%, more preferably 30-60% Kaolin 0-28%, more preferably 5-20% Water-soluble magnesium salt 0-1%, more preferably 0-0.8% Fluorosilicate 0 -20%, more preferably 0-15% metasilicate 2-58%, more preferably 3-30% dicalcium silicate 0-20%, more preferably 3-15% calcium silicate 0-10%, more preferably Is 0.5 to 5% Portland cement 0 to 10%, more preferably 0.5 to 5% surfactant 0.1 to 2%, more preferably 0.1 to 1% water 0 to 20%, and Preferably 5 to 15%

In this case, sodium silicate is used as the silicate, magnesium chloride is used as the water-soluble magnesium salt, sodium silicofluoride is used as the silicofluoride salt, sodium metasilicate is used as the metasilicate, and dicalcium silicate is Nippon Heavy Chemical Industry Co., Ltd. The JMC powder manufactured by Co., Ltd., Caine H manufactured by Nippon Kagaku Kogyo Co., Ltd. as calcium silicate, and an anionic surfactant such as sodium lauryl sulfate as a surfactant are preferably used. If necessary, an inorganic or organic filler may be added to the above composition. In addition, foaming involves entraining air in a slurry having the above composition, and in this case, the density of the slurry is 0.2 to 1.2 g.
/ Cm ³ , especially it is preferable to entrain air so as to be 0.4 to 0.8 g / cm ³ (the density of the slurry having the above composition is about 1.4 g / cm ^{3 in the} non-foamed state) . If the density of the foamed slurry is lower than 0.2 g / cm ³ , the strength may be reduced, and if it is higher than 1.2 g / cm ³ , shrinkage may be large. It should be noted that the curing may be left at room temperature for 1 to 5 hours.

The joint rod in which the inorganic silicate foam 9 is filled in the concave groove 2 has excellent fire resistance of withstanding a high temperature of 900 ° C. or higher, and also has heat insulation.
Moreover, since the foam 9 is lightweight, the joint bar is not heavy.

The constitution of the joint bar main body and the like of the present invention is not limited to the above-mentioned embodiment, but can be variously modified.

[0016]

As described above, the joint bar of the present invention is excellent in fire resistance and heat insulation, and is lightweight and easy to handle.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an example of a conventional joint bar.

[Explanation of symbols]

 1 Joint Bar Main Body 2 Recessed Groove 6 Collar 9 Inorganic Silicate Foam

Claims (1)

[Claims] 1. A joint bar main body having a concave groove on the outer surface side, which is inserted between building material panels, and a collar portion projecting to both sides from the tip end side of the main body and covering one edge portion of the outer surface of the panel. A joint rod for connecting the building material panels to each other, wherein the concave groove is filled with an inorganic silicate foam.