JP2537721B2 - Steel tube column joint structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a steel pipe column as a closed section column in the field of civil engineering, construction or bridges.

[0002]

2. Description of the Related Art Generally, circular steel pipes and square steel pipes are widely used as steel columns because they have no directionality in strength such as strong axis and weak axis. And, the joining between the upper and lower columns of this kind is generally performed mainly by welding or bolt joining.

[0003]

However, since joining by welding is on-site welding, the work is easily affected by the weather, and there are many quality control works such as inspections. is necessary. Further, the welding accuracy of the builder greatly depends on the welding skill of the builder.

[0004] On the other hand, in the case of the bolt joining, the joining is mainly performed by the joining plate and the joining bolt. The joining strength is determined by the thickness of the joining plate and the number of the joining bolts.
To increase the joint strength, inevitably thicken the joint plate,
In addition, it is necessary to increase the number of joining bolts, which increases the cost.

An object of the present invention is to eliminate the disadvantages of the prior art and to provide a joint structure of steel pipe columns which can be joined securely, firmly and extremely easily.

[0006]

In order to achieve the above object, the present invention achieves the above object by welding a metal fitting having a hook-shaped cross-section to the end of a steel pipe pillar to be joined to form a recess in the inner portion of the outer peripheral surface of the steel pipe pillar. Provided on the outside of the column end, and the tip serving as the joining end of the joining metal object is formed as a thick portion, and the thickness thereof is projected forward at a height smaller than the depth of the recess to constitute a locking projection. Steel pipe columns to be joined are arranged vertically by joining the engaging projections of the metal fittings to each other vertically, and a storage recess of the engaging projections to be joined in parallel is formed on the inner surface. The joint plate is fitted into a large recess formed by the recesses formed by the metal joint, and the joint plate and the metal joint are fixed with a tap screw, and the locking projection is an edge except for the mutual joint ends. Is a trapezoidal cross section with Housing recess of the locking projection of the plate is to summarized in that a cross-sectional trapezoidal groove commensurate thereto.

[0007]

According to the present invention as set forth in claim 1, the hook-shaped joining metal piece is provided at the end of the steel pipe pillar on the factory side, and the locking projections of the tips of the joining metal piece are vertically arranged on the site. The steel pipe pillar ends are joined together so as to be joined, and the fitting plate is fitted into a large concave portion formed by the concave portions by the above-mentioned metal fitting so that the locking projections are housed in the concave portion.
Fix the joint plate and the joint metal with a tap screw.
According to this structure, the tensile force and the horizontal force generated by the bending moment and the like are transmitted by the bearing pressure generated by the bearing surface of the locking projection that is the convex portion and the bearing surface of the concave portion of the joint plate that is in contact with this.

According to the second aspect of the present invention, in addition to the above action, a large joining area can be obtained between the engaging projection and the concave portion of the joining plate, and a wedge effect can be obtained. The rattling that occurs can be eliminated.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front view showing one embodiment of a joint portion of a steel pipe column according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 4 is a cross-sectional view taken along line B.

In the drawings, reference numerals 1 and 1 denote steel pipe columns as closed-section columns, but in this embodiment, they are square steel pipes. A metal fitting 2 having a hook-shaped cross section is welded to the ends of the steel pipe pillars 1 and 1 to be joined, and a recess 3 is provided outside the end of the steel pipe pillar 1 with this metal fitting 2. In addition, the tip of the metal joint 2 is the metal joint 2
The joint ends of the two metal parts are joined to each other, and the leading end, which is the joint end of the joined metal object, is a thick portion, and the thickness thereof is projected forward at a height smaller than the depth of the recessed portion 3 to engage the locking projection. (Cotter) 5.

The locking projection 5 has a taper 13 at either the left or right end and either the upper edge or the lower edge, and the upper edge or the lower edge which is an end of the steel pipe column 1 and is joined to each other as described later is not formed. A trapezoidal cross section was used as the vertical joint surface. Further, the locking projection 5 is discontinuous at the central position of the metal joint 2, and this discontinuous portion forms a groove 10 continuous with the recess 3 on the surface of the metal joint 2.

Reference numeral 4 in the drawing denotes a joining plate having an outer circumference and a thickness which match the recessed portions 3 to be joined when joining the joining metal pieces 2, and a locking projection which is joined vertically to the inner side surface thereof. A storage recess 6 having a size for storing 5 is formed inside. At the central portion of the joint plate 4, a space between the ends of the concave portion 6 becomes a convex portion 11 which is fitted into the concave groove 10 so as to maintain the same thickness as other portions. The storage recess 6 has a trapezoidal cross section having a tapered side surface that matches the shape of the locking projection 5 having a trapezoidal cross section, but the depth thereof is shallower than the height of the locking projection 5. Then, so to speak, it may be a small source.

Further, the joining plate 4 has bolt through holes for tap screws, which will be described later, formed in the thickness direction in the upper and lower portions of the recess 6, and the counterbore 12 into which the head of the tap screw fits on the outer surface.
To provide. Corresponding to the bolt through hole, a bolt hole is provided at the bottom of the recess 3 of the metal joint 2 and the steel pipe pillar 1 is also provided with a bolt through hole corresponding to the bolt through hole.

In this way, the steel pipe columns 1 are arranged vertically so that the locking projections 5 of the metal joint 2 are vertically joined.
These vertically projecting locking projections 5 and 5 are housed in the recess 6, and the joining plate 4 is straddled over the steel pipe columns 1 and 1 so that the projection 11 fits into the recess groove 10, and the recess 3 is formed. It is applied from the outside so that it fits into a large recess formed by combining them. Then, the joining plate 4 and the joining metal piece 2 are fixed with the tap screw 7 through the bolt through hole.

The periphery of the locking projection 5 is joined to the joining plate 4
By covering with, the tensile force generated by a bending moment or the like is transmitted by the bearing force generated on the bearing surface of the engaging projection 5 which is a convex portion and the concave portion 6 of the joint plate 4 which is in contact therewith,
The horizontal force is transmitted by the bearing force of the vertical groove 10 between the left and right ends of the locking projection 5 and the convex portion 11 between the concave portions 6 of the joint plate fitted therein.

The engaging projection 5 and the recess 6 of the joint plate 4 are trapezoidal in cross section, so that the joint area can be made large, and the recess 6 can be made a little smaller to produce a wedge effect. It is possible to prevent rattling caused by errors such as accuracy. Furthermore, since the counterbore 12 accommodates the head of the tap screw 7, there is nothing protruding from the surface of the steel pipe column 1 and it does not interfere with the attachment of the finishing material.

In the above embodiment, the steel pipe column 1 is a square steel pipe, but the present invention can be similarly applied to the case of a circular steel pipe if the metal joint 2 and the joint plate 4 are curved plates.

Further, as shown in FIGS. 4 and 5, concrete 9 can be filled into the inside of the steel pipe columns 1 joined vertically as described above to form a steel pipe concrete column.

[0019]

As described above, the joint structure of steel pipe columns according to the present invention eliminates the need for welding work on site, and enables reliable, strong, and extremely easy joining. Labor saving can be realized.

[Brief description of drawings]

FIG. 1 is a front view showing one embodiment of a joint structure of a steel pipe column according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a vertical cross-sectional front view in the case where the steel pipe columns joined according to the present invention are steel pipe concrete columns.

FIG. 5 is a cross-sectional plan view in the case where the steel pipe columns joined in the present invention are steel pipe concrete columns.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel pipe column 2 ... Joining hardware, 3 ... Recessed part 4 ... Joining plate 5 ... Locking protrusion 6 ... Recessed part 7 ... Tap screw 9 ... Concrete 10 ... Recessed groove 11 ... Convex part 12 ... Counterbore 13 ... Taper

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akio Tomita 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Nobuo Fujimoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Tomofumi Sekiguchi 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd.

Claims (2)

(57) [Claims] 1. A welded metal piece having a hook-shaped cross section is welded to an end of a steel pipe pillar to be joined to form a recess located inside the outer peripheral surface of the steel pipe pillar outside the end of the steel pipe pillar, and the welded end of the welded metal piece is joined. The tip end is a thick part, and the thickness of the part is projected forward at a height smaller than the depth of the recess to form a locking projection, and the locking projections of the metal joint are joined vertically. By arranging the steel pipe columns to be joined by arranging them vertically, and forming a joint plate formed on the inner side surface with a recess for accommodating locking protrusions that are joined in parallel vertically A joint structure of a steel pipe column, characterized in that the joint plate is fitted inside and the joint plate and the joint metal are fixed with a tap screw. 2. The locking projection has a trapezoidal cross section with a tapered edge except for the joint ends, and the recess of the locking projection of the joint plate has a trapezoidal cross section corresponding thereto. Item 1. A joint structure of a steel pipe column according to Item 1.