JPH07317153A - Joining structure of square steel pipe column - Google Patents

Abstract

PURPOSE:To enhance the joining strength with a simple structure. CONSTITUTION:A joining body 2 is formed of a square steel pipe of a prescribed length the outer diameter of which is set substantially equal to the bore diameter of square steel pipe columns 1a, 1b to connect, and a plurality of bolt holes 3 are provided on the upper and lower parts of each side wall of the joining body 2. On the other hand, bolt inserting through-holes 4 corresponding to the bolt holes 3 of the connecting body 2 are bored near each connecting end part of both the square steel pipe columns 1a, 1b, respectively. The connecting body 2 is fitted into the connecting end parts of both the square steel pipe columns 1a, 1b so as to straddle them, and bolts 5 are screwed to the bolt holes 3 through each through-hole 4 to fasten them, whereby both the square steel pipe columns 1a, 1b are integrally connected through the joining body 2. Further, the connecting end parts of both the square steel pipe columns 1a, 1b and the joining body 2 are fixed together by welding 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for square steel tubular columns.

[0002]

2. Description of the Related Art Conventionally, as a joining structure of this type of rectangular steel pipe columns, for example, as shown in FIG. 5, the rectangular steel pipe columns 100 and 101 are joined between upper and lower rectangular steel pipe columns 100 and 101.
Short-sized square steel pipes 102, 103 to be inserted into the respective joint ends of
Horizontal diaphragm 10 with the upper and lower surfaces fixed by welding
There is known a structure in which the upper and lower rectangular steel pipes 100 and 101 are fixed to the horizontal diaphragm 104 by welding by interposing 4 therebetween.

[0003]

In the conventional joint structure of rectangular steel tube columns, the welding is incomplete because the upper and lower rectangular steel tube columns 100 and 101 are merely welded to the horizontal diaphragm 104. In addition, there is a problem in that sufficient joining strength cannot be obtained, for example, when a strong bending moment is applied to the welded portion, a peeling phenomenon may occur in the welded portion.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to provide a rectangular steel pipe which has a simple structure and can significantly enhance the strength of the joint. It is intended to provide a joint structure of columns.

[0005]

In order to achieve the above object, in the joining structure of the rectangular steel pipe columns of the present invention, a rectangular steel pipe of a predetermined length having an outer diameter substantially equal to the inner diameter of the rectangular steel pipe columns to be joined is used. A bolt that forms a joined body and is provided with a plurality of bolt holes in the upper and lower portions of each side wall of the joined body, and on the other hand, near each joined end portion of a prismatic steel tubular column to be joined, a bolt that faces the bolt hole of the joined body. Each through hole for insertion is drilled,
The joint body is fitted so as to straddle the joint end portion of the double-sided steel pipe column, and the double-sided steel pipe column is connected through the joint body by screwing and fastening bolts from the through holes to the bolt holes. It is integrally joined, and further, the joining end portion of the prismatic steel tube column and the joined body are fixed by welding.

[0006]

[Function] The jointed double-angled steel tube column is fixed by bolts to each other by the jointed body, and the jointed end portion and the jointed body are fixed by welding to be integrated. It is possible to improve the strength of bonding.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4, reference numerals 1a and 1b denote prismatic steel pipe columns, and 2 denotes a joined body for joining the prismatic steel pipe columns 1a and 1b. The rectangular steel pipe columns 1a and 1b are long tubular columns having a substantially square cross section, and their joint end faces are tapered to enhance welding strength.

The joint body 2 is composed of a square steel pipe of a predetermined length having an outer diameter substantially equal to the inner diameters of the square steel pipe columns 1a and 1b, and bolt holes are formed in the upper and lower portions of each side wall of the joint body 2. Two 3 are provided. On the other hand, in the vicinity of the joint end of each side wall of each of the rectangular steel pipe columns 1a and 1b, the joint body 2
A through hole 4 for inserting a bolt is formed opposite to the bolt hole 3. In addition, each side wall of the joined body 2 has a rectangular steel pipe column 1
A groove 7 is provided so as to face the welding points 6 of a and 1b. The recessed groove 7 connects the joined body 2 to the rectangular steel pipe column 1a,
The bulge of the welded part can be received when it is fitted into 1b.

The distance L between the upper and lower bolt holes 3 of the joined body 2 is slightly larger than the sum of the distances L ₁ and L ₂ from the joint ends of the rectangular steel pipe columns 1a and 1b to the through holes 4. It is set so that

Therefore, in order to join the two rectangular steel tube columns 1a and 1b, one of the rectangular steel tube columns 1a is first joined as shown in FIG.
The lower part of the joined body 2 is fitted into the joining end of the bolt 5, and the bolt 5 is screwed into the bolt hole 3 from the through hole 4 to perform fastening, and then the joined body 2 is joined to the joining end of the other rectangular steel pipe column 1b. The rectangular steel tube columns 1a and 1b are joined to each other by fitting the upper part of the above and bolting the bolt 5 from the through hole 4 to the bolt hole 3 in the same manner and tightening. Then, the joint ends of the prismatic steel tubular columns 1a and 1b and the joint body 2 located in the gap between the joint ends are fixed by welding 8.

According to the present invention having the above-mentioned structure, the rectangular steel tube columns 1a and 1b to be joined are fastened to each other by bolts 5 by the joined body 2 as shown in FIG. 4, and the rectangular steel tube columns 1a and 1b are further fixed. The joint end and the joint body 2 are fixed by welding 8 to be integrated.
The joining strength of a and 1b becomes extremely large.

[0017]

As described above, in the joining structure of the rectangular steel pipe columns of the present invention, the bilateral steel pipe columns to be joined are joined and fixed by the joining body, and the joining end portion of the bilateral steel pipe columns and the joining body are joined together. Since it is welded and fixed to the three members, there is an effect that the joint structure of the prismatic steel tubular columns can be made stable and strong.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is an exploded perspective view illustrating a joined state of a rectangular steel pipe column and a joined body.

4 is a cross-sectional side view of FIG.

FIG. 5 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1a, 1b Square steel tube column 2 Joined body 3 Bolt hole 4 Through hole 5 Bolt 8 Welding

Claims (1)

[Claims] 1. A joined body is formed by a square steel pipe having a predetermined length and an outer diameter substantially equal to the inner diameter of a square steel pipe column to be joined, and a plurality of bolt holes are provided on the upper and lower portions of each side wall of the joined body. , On the other hand, through holes for bolt insertion respectively facing the bolt holes of the joined body are formed near each joined end portion of the joined rectangular steel pipe columns, and the joined body is joined to the joined ends of the rectangular steel pipe columns. While straddling it, the bolts are screwed from each through hole into the bolt holes and fastened to join the prismatic steel pipe columns together through the joint body, and the joint ends of the prismatic steel pipe columns are further joined. A joint structure for square steel pipe columns, characterized in that the joint portion and the joined body are fixed by welding.