JPS5849666B2 - Square steel pipe connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection structure for square steel pipes, and more particularly to an improvement in a connection structure for welding joints between square steel pipes.

Conventionally, the joint joint of square steel pipes has a structure shown in FIG. 1 and L shown in FIG. 2.

That is, in FIG. 1, when welding the second square steel pipe 2 of the same shape to the side surface of the first square steel pipe 1, welding is performed directly at the welding part 3 without any intermediate member. It is something to do.

However, in this structure, the corner R surface 1A of the first square steel pipe 10
Therefore, a large gap 4 is created between the rounded surface of the first square steel pipe 1 and the end face of the second square steel pipe 2.

For this reason, welding performance deteriorates and sufficient strength cannot be obtained.
In addition, there is a disadvantage that the amount of welding is large and the welding strain increases.

In addition, as shown in FIG. 2, a second square steel pipe 2 of the same shape is brought into contact with the side surface of the first square steel pipe 1, and a reinforcing member 5 made of a steel plate with a substantially U-shaped side surface is used. L. The U-shaped part of the reinforcing member 5 is fitted onto the outer periphery of the first square steel pipe 1, and the side surface of the reinforcing member 5 is brought into contact with the side surface of the second square steel pipe 2, and these are welded. It is something that connects.

However, although this structure is satisfactory in terms of strength, it requires a large amount of welding, and in terms of machining the reinforcing member 5, a relatively large part of the inside of the U-shape becomes unnecessary material, making it uneconomical. There are drawbacks.

An object of the present invention is to provide a connection structure for square steel pipes that has improved weldability and can ensure sufficient strength.

In the present invention, when connecting the second square steel pipe to the side surface of the first square steel pipe, a joining member is interposed between both steel pipes, and this joining member is connected to the corner R surface of the first square steel pipe. The width of the second square steel pipe extends along the longitudinal direction of the first square steel pipe. The above object is achieved by welding and connecting the first square steel pipe and the joint member, and the second square steel pipe and the joint member, which are formed to have the same or more length. .

Embodiments of the present invention will be described below with reference to the drawings.

Here, the same reference numerals are used for the same or equivalent components as in the conventional example.

3 and 4 show a first embodiment of the present invention. On one side of a first square steel pipe 1 as a pillar material, a second corner steel pipe as a beam material having the same cross-sectional shape is provided. A square steel pipe 2 is brought into contact with the square steel pipe 2, and a l-th
A joining member 6 is interposed along both corners of the square steel pipe 10.

This joining member 6 has an inner surface in contact with the R surface 1A of the corner portion of the first square steel pipe 10 formed into an R surface 6A substantially along the R surface 1A, and a second R surface 6A on the outer surface of the R surface 6A. A flat part 6B is formed which comes into contact with the end face of the square steel pipe 2, and this flat part 6B is approximately flush with the side surface of the first square steel pipe 1 against which the second square steel pipe 2 comes into contact. Further, this joining member 6 has a width equal to or larger than the longitudinal width B of the first square steel pipe 1 of the second square steel pipe 2 along the longitudinal direction of the first square steel pipe 1. It is made to have a length L of °C.

The first square steel pipe 1, the joining member 6, and the second square steel pipe 2
and the joining member 6 are welded together at a welding portion 7, etc., and the first square steel pipe 1 and the second square steel pipe 2 are also welded together.

According to this embodiment constructed in this way, the side surface of the l-th square steel pipe 1 to which the second square steel pipe 2 is connected is the same as the corner R surface of the first square steel pipe 10. Since the part is covered by the joining member 6, it becomes almost planar, which makes welding work easier, and also has the effect of reducing the amount of welding and improving welding performance.

Further, the flow of force from the second square steel pipe 2 as a beam material to the first square steel pipe 1 as a column material becomes clear, and the necessary strength can be easily obtained.

Furthermore, the shape of the joining member 6 is also simple and small, and it can be provided at low cost.

Next, FIG. 5 shows a second embodiment of the present invention, in which the joining member 8 is connected to the corner R of the first square steel pipe 10.
In addition to the inner surface consisting of the R surface 8A along the surface 1 and the flat portion 8B that comes into contact with the end surface of the second square steel pipe 2, a second The second square steel pipe 2 is provided with a rising portion 8C along the circumferential surface of the square steel pipe 2, and the second square steel pipe 2 is also welded to the end face of this rising portion 8C.

Even with this structure, the same effect as that of the first embodiment can be obtained, and furthermore, there is an effect that positioning of the second square steel pipe 2 is facilitated when welding the second square steel pipe 2.

Next, FIG. 6 shows a third embodiment of the present invention. An example of the joining member 9 used when square steel pipes of different diameters are joined together is shown.

The joining member 9 of this embodiment has a first square steel pipe 10 corner R101
It is the same as each of the above embodiments in that it has an R surface 9A that follows the human body and a plane portion 9B that comes into contact with the end surface of the second square steel pipe 2, but the plane portion 9B of this embodiment is similar to the first The flat parts 9 of the two joining members 9 are extended to cover half of the side surfaces of the first square steel pipe 1 and are arranged at both corners of the first square steel pipe 10.
B is joined at the center of one side of the first square steel pipe 1, and the flat parts 9B of the joining members 9 on both sides completely cover one side of the first square steel pipe 1. be.

In addition, the flat portions 9 of the two joining members 9 joined to each other L.
B is made to be substantially the same plane, and the second square steel pipe 2 is welded and connected to this plane part 9B.

The present embodiment configured as described above has the same effects as the above embodiments, and also has square steel pipes 1 of different diameters,
This has the effect of preventing local deformation caused by the contact between the two.

In addition, in this third embodiment, the joining member 9 is not limited to one provided at each corner of the first square steel pipe 1, but both may be integrated. As mentioned above,
According to the present invention, it is possible to provide a connection structure for square steel pipes that has improved weldability and can ensure sufficient strength.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing an example of a conventional connection structure for square steel pipes, FIG. 2 is a plan view showing another example of a conventional connection structure,
FIG. 3 is a perspective view showing a first embodiment of a connection structure for square steel pipes according to the present invention, FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a second embodiment of the present invention. FIG. 6 is a sectional view corresponding to FIG. 4 showing an example, and FIG. 6 is a plan view showing a third embodiment of the present invention. 1... First square steel pipe, 1 person... Corner R surface, 2...
・No. 20 square steel pipe, 6, 8, 9... joint member, 6A,
8A, 9A...R surface, 6B, 8B, 9B...flat portion, 8C...rising portion.

Claims (1)

[Claims] 1. A first square steel pipe, a second square steel pipe disposed substantially perpendicular to the side surface of the first square steel pipe, and
and a joining member disposed between the square steel pipe and the second square steel pipe, and the joining member is arranged at the corner R of the first square steel pipe.
The width of the second square steel pipe has an inner surface substantially along the plane, and a flat part that comes into contact with the end face of the second square steel pipe, and the width of the second square steel pipe extends along the longitudinal direction of the first square steel pipe. What is claimed is: 1. A connection structure for square steel pipes, characterized in that the joint member and the first square steel pipe are welded together, and the joint member and the second square steel pipe are connected by welding. 2. According to claim 1, the joining member includes a rising portion along the circumferential surface of the second square steel pipe in a portion protruding from the outer shape of the second square steel pipe, A connection structure for a square steel pipe, characterized in that an end face of a rising portion and a second square steel pipe are connected by welding.3. The first square steel pipe has a larger cross-sectional shape than the second square steel pipe, and the connecting member is large enough to cover the entire surface of one side of the first square steel pipe. A connection structure for square steel pipes, characterized in that a second square steel pipe is connected to a surface opposite to a surface in contact with the square steel pipe.