JPH04284969A - Manufacture of columnar pillar - Google Patents

Abstract

PURPOSE:To manufacture a high-strength column pillar with small man-hour by using a square steel pipe which is manufactured by roll forming method. CONSTITUTION:The column pillar 1 is manufactured by assembling an integral inside reinforcing diaphragm 21 by joining two inner diaphragms 13 with a connecting ironware 20, boring slit-shaped through-holes 22 in the circumferential direction of beam joining part B of the square steel pipe 8 which is manufactured by roll forming method, inserting the inside reinforcing diaphragm 21 and executing plug welding 23 through the through-holes 22 from the outside.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a method for manufacturing columns used as pillar materials for pure iron structures, steel-framed concrete structures, steel-framed reinforced concrete structures, etc. in architectural structures.
In particular, it relates to a method of manufacturing a column having an internally reinforcing diaphragm.

0002

[Prior Art] As shown in Fig. 2, conventional steel-framed buildings have columns 1, and large beams 3 are built from the joints 2 of the columns, and small beams 4 are reinforced between them to provide floor space for each floor. A surface 5 is formed. As shown in FIG. 3, this column column 1 has a base surface 6
Square steel pipe 8 joined to base plate 7 to be attached to
A diaphragm 9 is inserted between the two. As shown in Fig. 4, the assembly of the joint part 2 is as follows: After bevelling the end face of a short square steel pipe 10, attaching the backing metal 11 by tack welding, and passing the diaphragm through the upper and lower ends of the backing metal 11. Weld and install 9. This is the so-called Shiguchi core called a dice. Furthermore, a short H-shaped steel 12 with a groove
is welded to the surface of the square steel pipe 10, thereby completing the joint part 2 as shown in FIG.

[0003] The manufacturing and processing process of such a column 1 is shown in flowchart as follows: Cutting the square steel pipe (4 times) → Bevel processing of the square steel pipe (6 places on both sides) → Manufacturing and temporary attachment of the backing metal ( both sides 6
2 locations)→Production and installation of through diaphragm (2 locations on both sides)
→ Installation of H-shaped steel (welding) → Installation of square steel pipe (both sides welded 2)
location) → Column pillar 1 is completed.

0004

[Problems to be Solved by the Invention] However, among the above-mentioned processing steps, there are many steps involved in bevel processing of square steel pipes, production and temporary attachment of backing metals, production and installation of through diaphragms, and installation of square steel pipes. These processes require time and effort, and are said to account for a large portion of the cost of the column, about 70%. Furthermore, since the square steel pipes are cut and then connected by welding, there is the problem that it is difficult to maintain straightness and the pipes tend to bend. Furthermore, since there is a diaphragm in the joint part, it is not possible to make the end face straight when installing the H-shaped steel, and it is necessary to process a step between the flange part and the plate part.

[0005] In addition, in the case of the inner diaphragm type joint section that has been commonly used in the past, it is necessary to cut the square steel pipe 8 at the part A where the inner diaphragm 13 is inserted, as shown in Fig. 6(a). In order to fix the inner diaphragm 13 inserted from the cut part A, the backing metal 14 is welded as shown in Fig. 6(b), and then the backing metal 14 is welded as shown in Fig. 6(c).
As shown in the figure, the inner diaphragm 13 is applied and welded, and the cut portion A is beveled and a backing metal 15 is welded for the next connection. And all of these welding points are U
Perform T test. In the case of the inner diaphragm method, it is necessary to cut a long column manufactured by roll forming to insert the inner diaphragm 13, and it is also necessary to perform centering and welding again after insertion and installation. Because of this, it takes a lot of effort and a lot of waste.

By the way, for example, Japanese Patent Laid-Open No. 64-903
Publication No. 49 proposes a column column 19 formed by welding ribs 17 to the inside of a half-split member 16 formed into a U-shape and performing vertical seam welding 18, as shown in FIG. There is. However, the column column 19 having such a rib
In the conventional manufacturing method, considering the purpose of placing vertical rib reinforcement only at the column-beam joint, seam welding 18 is performed over the entire length of the column column itself, which is uneconomical because the amount of vertical seam welding is too large. At the same time, it is time-consuming to manufacture, impairs its mechanical properties as a column material, and it is not possible to use square steel pipes manufactured using the roll-forming method, which has high production efficiency. There is.

[0007] An object of the present invention is to provide a method for manufacturing a column that solves the above-mentioned problems.

[0008]

[Means for Solving the Problems] The present invention provides a method in which a slit-like through hole is bored in the circumferential direction of the joint portion of a rectangular steel pipe manufactured by a roll forming method with a beam, and at least two
An internal reinforcing diaphragm assembled by joining two diaphragms so that they are parallel and at right angles to each other is inserted into the square steel pipe, and the internal reinforcing diaphragm is plug welded through the through hole. This is a method for manufacturing columns.

[0009]

[Function] According to the present invention, an internally reinforcing diaphragm consisting of two diaphragms assembled in advance is inserted into a rectangular steel pipe having a slit-like through hole drilled in the beam joint. Plug welding is performed from the outside of the square steel pipe through the square steel pipe, so it is possible to manufacture the column column without cutting the square steel pipe manufactured by the roll forming method in the middle.

0010

[Example] Below, the manufacturing process of the square steel pipe of the present invention will be explained in detail with reference to FIG. In the drawings, the same members as those in the conventional example are designated by the same reference numerals, and the explanation thereof will be omitted. ■
First, as shown in FIG. 1(a), a connecting metal fitting 20 such as a pipe or a bolt having a predetermined length h is used to connect a connecting metal fitting 20 having a predetermined plate thickness t and a dimension to abut against the inner surface of a square steel pipe 8. The inner reinforcing diaphragm 21 is assembled and manufactured by joining each side of the inner diaphragm 13 so that each side is parallel and at right angles. The length h is determined according to the dimensions of the large beam 3 connected to the square steel pipe 8, and the plate thickness t may be determined to be the beam flange thickness plus an allowance for installation. In addition, this internal reinforcement diaphragm 2
1 may be manufactured integrally from cast steel. ■ Then,
As shown in Fig. 1(b), a square steel pipe 8 manufactured by the roll forming method, which will become a column column 1, is cut to a desired length H for the column needed for the first floor or above, and the material is taken out. Length w and width d on each surface in the circumferential direction of joint B with 3
The slit-like through holes 22 are bored at intervals of (h+t) using, for example, mechanical cutting, gas cutting, plasma processing, or the like. The dimensions w and d of the through hole 22 are set to correspond to the inner diaphragm 13 of the inner reinforcing diaphragm 21. ■ And, as shown in Figure 1(c),
The internal reinforcing diaphragm 21 is inserted into the inner surface of the square steel pipe 8, and plug welding 23 is applied to each side of the inner diaphragm 13 from the outside through the through hole 22. As shown in FIG. Securely joins to the inner surface. Furthermore, H
When the section steel 12 is welded and attached, and the base plate 7 is attached to the lower end of the square steel pipe 8, the column column 1 is completed.

[0011] This plug welding 23 is, for example, a SMAW
, MAG, MIG, SAW, or other general welding methods may be used. In addition, during plug welding 5, in order to ensure adhesion between the internal reinforcing diaphragm 21 and the square steel pipe 8, welding while applying pressure from the outside using a pressing device such as a press improves weldability and increases tensile strength. can be improved. Moreover, since the inner diaphragm 13 is installed at the beam flange position, the number of inner diaphragms 13 may be greater than two depending on the beam flange position.

[0012] Through this process, the square steel pipe manufactured by the roll forming method can be used without cutting it midway, so the number of parts is fewer than in the conventional method, and there is no need for beveling or backing. There is no need to attach a column, and high-quality columns with high tensile strength can be produced almost continuously, making mass production possible.

[0013]

[Effects of the Invention] As explained above, according to the present invention, by using a square steel pipe manufactured by the roll forming method,
Since the internal reinforcing diaphragm is attached to the desired position without cutting it midway and welding is performed from the outside of the square steel pipe, it is possible to mass-produce inexpensive columns.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the manufacturing process of a column according to the method of the present invention.

FIG. 2 is a perspective view showing the structure of a column used in a conventional steel frame building.

FIG. 3 is a perspective view of a conventional column.

FIG. 4 is a perspective view showing an assembled state of a conventional joint part.

FIG. 5 is an assembly diagram of a conventional joint section.

FIG. 6 is an explanatory diagram of the manufacturing process of a conventional inner diaphragm type joint part.

FIG. 7 is an explanatory diagram of a column disclosed in Japanese Patent Application Laid-Open No. 64-90349.

[Explanation of symbols]

1 Column pillar 2 Shiguchi section 3 Main beam 7 Base plate 8　Square steel pipe 13 Inner diaphragm 20 Connecting hardware 21 Internal reinforcement diaphragm 22 Through hole 23 Plug welding

Claims (1)

[Claims] [Claim 1] A slit-shaped through hole is bored in the circumferential direction of the joint with the beam of a rectangular steel pipe manufactured by the roll forming method, and at least two diaphragms are arranged so that they are parallel and perpendicular to each other. Insert the internal reinforcing diaphragm assembled by combining into the square steel pipe,
A method of manufacturing a column, comprising plug-welding the internal reinforcing diaphragm through the through hole.