JPH0443527B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm joining method for column structural members.

Today, square columns are exclusively used for steel frame structures such as building construction, and the square columns 1 and beams 2 are connected via diaphragms 3 as shown in Fig. 1A and B. However, as shown in Fig. 2, a backing metal 4 for holding the square column 1 in contact with the diaphragm 3 from the inside is temporarily attached in advance, and this is used as a guide as shown in Fig. 3. As shown, the rectangular column 1 is inserted and the main welding 6 is performed between it and the gap 5. By the way, in this conventional construction method, in addition to the material cost problem of using the backing metal 4 separately, there are also operational problems in tack welding the backing metal 4 and square column 1.
The precision of the R portion varies depending on the manufacturer and manufacturing conditions, resulting in high material costs and complicated welding work, reducing work efficiency. In addition, slag generated during welding is accumulated between the backing metal and the backing metal, which effectively reduces the welding surface and causes a problem of reduced strength.

The present invention aims to solve and eliminate the above-mentioned problems, and an example of implementing the present invention will be explained below based on the drawings.

FIG. 4 shows the state before welding work, and FIG. 5 is a cross-sectional explanatory view after welding work.

In the present invention, as shown in FIG. 4, the groove angle θ of the square column 1 is made relatively large (θ=35° to 65°) and long, and the groove edge P is moved inward to the column. Bend it about 3 to 15 mm towards the end. The bending process is performed by cold working using a pressure machine, hot molding, or other appropriate means.

Therefore, in the present invention, as shown in FIG. 5, during welding work, the open end edge P is brought into direct contact with the diaphragm 3, and after temporary attachment, the main welding work is performed.

In the present invention, the open end edge P is bent further inward to the column by about 3 mm to 15 mm, which means that between the bent end edge P and the diaphragm 3, there is a gap between the bent end edge P and the diaphragm 3. A gap K is formed, and slag and the like generated at the initial stage of welding are stored in the gap K.

Therefore, according to the present invention, it is possible to avoid a substantial reduction in the welding surface and no defects such as a decrease in strength occur, and since no backing metal is used, material costs can be reduced. In addition, this allows for simple and quick welding work by omitting work steps such as tacking.

In the above embodiment, a rectangular column is illustrated, but other polygonal or circular shapes may be used without any problem and are within the scope of the present invention.

[Brief explanation of drawings]

Figures 1A and B, Figures 2 and 3 explain the conventional construction method, Figure 4 shows the state before main welding according to the present invention, and Figure 5 is a cross-sectional explanatory diagram after welding work. . 1...Square column, 2...Beam material, 3...Diaphragm, 4...Backing metal, P...Bevel edge, K...
…gap.

Claims (1)

[Claims] 1. Bend the open end edge of the column structural material inward to the column by approximately 3 mm to 15 mm, bring the end edge into direct contact with the diaphragm, and perform the welding work without using a backing metal. A diaphragm joining method for column structural materials.