JPH0745686Y2 - Fireproof coating structure of steel column - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof coating structure of a steel-framed round pillar.

[0002]

2. Description of the Related Art Conventionally, as a fireproof coating structure of a steel-framed round pillar, as shown in FIG. 8, a cylindrical fireproof coating part b is formed by assembling an arc-shaped fireproof coating material b ₁ around a steel-framed round pillar a. Has proposed a structure that is concentrically surrounded by a clearance C.

In the fireproof coating structure having the above-mentioned structure, the fireproof coating material b ₁ constituting the fireproof coating portion b is light-weight grooved steel d fixed to the steel frame round pillar a by the application of welding means and the tapping screw e is attached thereto. Although it is installed and fixed according to the application, it requires professionals to weld the light weight grooved steel d, which not only makes it difficult to secure human resources, but also requires curing of the sparks generated during welding work, which is troublesome. Met.

The present invention has been made for the purpose of eliminating such conventional problems.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a cylindrical fire-resistant structure for a steel-pillared round column, which surrounds a steel-framed round column constituting a frame of a building with a cylindrical fire-resistant coating part with a clearance. The cladding is assembled from the arc-shaped refractory coating so that the longitudinal seams form a straight line, and in the circumferential space between the steel frame column and the cylindrical refractory coating, the longitudinal length of the cylindrical refractory coating is increased. Lightweight grooved steel is installed along the directional seam,
The light-weight grooved steel is fixed at the lower end to the concrete floor surface of the building in a standing state by applying a fastener, and the light-weight grooved steel has an arc-shaped fire-resistant coating material forming a cylindrical fire-resistant coating portion, respectively. Of the present invention relates to a fireproof coating structure of a steel-framed round column, characterized in that the ends thereof are fixed by applying tapping screws.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to the accompanying drawings.

In one embodiment of the present invention shown in FIGS. 1 to 4, the cylindrical fireproof coating 3 surrounding the steel column 1 with a circumferential gap 2 is a semi-cylindrical shape as shown in FIG. The refractory covering materials 3a, 3a are assembled from a left and right pair.

As shown in FIG. 1, the cylindrical fireproof coating 3
Has a three-stage structure including an upper stage 3A, a middle stage 3B, and a lower stage 3C, and is formed from the floor surface 6 to a height slightly higher than the ceiling surface 11, and the longitudinal seams 4 of each stage are aligned.

As shown in FIG. 2, in the circumferential gap 2 between the steel-framed round pillar 1 and the cylindrical refractory covering portion 3, a lightweight grooved steel is formed along the longitudinal seam 4 of the refractory covering portion 3. 5 and 5 are installed. The lightweight channel steel 4 may be with or without a lip.

As shown in FIG. 4, the lower end of the lightweight channel steel 5 is attached and fixed to the concrete floor surface 6 of the building through a side L-shaped attachment metal 7.

The mounting hardware 7 is fixed to the floor 6 by the construction studs 8 at the horizontal portion 7a, and at the vertical portion 7b.
It is fixed to the lower end of the lightweight channel steel 5 with a tapping screw 9.

The semi-cylindrical refractory covering materials 3a, 3a constituting the cylindrical covering portion 3 are attached and fixed to the lightweight grooved steel 5, 5 by applying tapping screws 10 at both ends thereof. At the time of mounting and fixing work with the tapping screw 10, the light weight grooved steels 5 and 5 may be reversed due to the screwing tightening pressure of the tapping screw 10. Therefore, in order to prevent this reversal, the light grooved steels 5 and 5 may be reversed. A packing material 12 made of refractory, for example, calcium silicate, can be packed in each of the parts 5 and 5 where the tapping screw 10 is screwed. The packing material 12 is bonded and fixed to a predetermined position of the steel-framed round pillar 1 by applying an adhesive (not shown) in a step before the standing and fixing of the lightweight groove steels 5, 5.

As shown in FIG. 2, a space-maintaining member 14 made of fireproof material, for example, calcium silicate, is interposed between the steel-framed round pillar 1 and the cylindrical fireproof coating portion 3 to form the circumferential gap 2. ing. The semi-cylindrical refractory coating material 3a may be fixed to the spacing member 14 with a tapping screw if necessary.

According to the fireproof coating structure according to the present invention, the lightweight grooved steel 5 is attached to the concrete floor surface 6 with the mounting hardware 7,
Since the construction studs 8 and the tapping screws 9 and other fasteners are applied and fixed upright, the welding work as seen in the conventional structure shown in FIG. 8 is not required at all.

In the present invention, the mounting direction of the L-shaped mounting hardware 7 may be outward as shown in FIG. 4 or inward as shown in FIG.

As shown in FIG. 6, overhangs 5a, 5a are formed by bending at the lower end of the lightweight grooved steel 5, and the overhangs 5a, 5a are formed.
When fixing to the concrete floor surface 6 by applying the construction stud 8, the use of the L-shaped fitting 7 can be omitted.

The lateral seams 13 between the stages of the cylindrical refractory covering 3 may be laterally aligned as shown in FIG. 1 with reference to the longitudinal seams 4 or shown in FIG. Thus, it may be shifted by a half pitch.

A calcium silicate molding is usually used as the fireproof coating 3a, but other materials may be used.

The shape of the fireproof coating material 3a is preferably a semi-cylindrical shape which is a two-division type, but may be a three-division type or a four-division type.

[0020]

EFFECTS OF THE INVENTION Since the fireproof coating structure of the present invention does not require any welding work, there is no problem in securing human resources, complicated work such as curing of welding sparks can be omitted, and workability can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged cross-sectional view taken along line 3-3 of FIG.

FIG. 4 is an exploded perspective view showing a mounting and fixing portion of a lower end of the lightweight grooved steel in FIG.

FIG. 5 is a perspective view showing a modification of FIG.

FIG. 6 is a perspective view showing still another modification of FIG.

FIG. 7 is a partially cutaway front view showing a state in which the horizontal seam of the fireproof coating is shifted by a half pitch on the left and right with respect to the vertical seam.

FIG. 8 is an explanatory diagram of a conventional structure.

[Explanation of symbols]

 1 Steel round column 2 Circumferential gap 3 Cylindrical fireproof coating 4 Longitudinal seam 5 Lightweight grooved steel 6 Concrete floor surface 7 Mounting hardware 8 Construction stud 9 Tapping screw 10 Tapping screw 11 Ceiling surface 12 Packing material 13 Lateral seam 14 Spacing Holding member

Claims (1)

[Scope of utility model registration request] 1. In a fire-resistant coating structure of a steel-framed round pillar which surrounds a steel-framed round pillar constituting a frame of a building with a cylindrical fire-resistant covering portion with a clearance, the cylindrical fire-resistant covering portion is formed of an arc-shaped fire-resistant covering material. It is assembled so that the longitudinal seams are aligned, and in the circumferential gap between the steel round column and the cylindrical fireproof coating, a lightweight groove is formed along the vertical seam of the cylindrical fireproof coating. Shaped steel is installed, the light weight grooved steel is fixed to the concrete floor surface of the building at the lower end in an upright state by applying a fastener, and the light weight grooved steel has a circular arc shape forming a cylindrical fireproof coating. A fireproof coating structure of a steel-framed round column, characterized in that each end of the fireproof coating is fixed by applying tapping screws.