JPH0677989U - Backing material for welding four-sided box columns - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a backing material that requires less labor such as cutting work and can easily ensure accuracy in the corners of a four-sided box column to be welded. [Structure] Inside the four corners of the four-sided box column 1, square bars 3 used as a backing material in the production thereof are attached.
First, an L-shaped backing material 4a manufactured by forging or the like is attached to the outer surface of the square rod 3 by welding. This determines the accuracy of the four corners of the box column 1. Next, the backing material 4b is fitted between the L-shaped backing materials 4a and attached to the inner surface of the four-sided box pillar 1 by spot welding 5 or the like. These backing materials 4a and 4b secure the route interval of the groove portion, and the upper and lower four-sided box pillars are welded at the construction site.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a welding backing material for securing a root interval required for field welding of a four-sided box column.

[0002]

[Prior art]

 When a four-sided box column is manufactured by welding steel plates, a corner bar with a cross section of about 22 mm square or 25 mm square is attached to the corner as a backing material for corner welding.

Conventionally, as a backing material for on-site welding when a four-sided box column to which such a square bar is attached is added upward in a building, a strip plate attached to the four sides of the box column from the inside has hitherto been used. As shown in FIG. 4, notches 11 were provided at the ends where the square rods 3 were joined, as shown in FIG.

That is, the root interval is secured by combining the four backing materials 4 whose cutting portions are joined to the square bars 3 with the square bars 3 and welding them at regular intervals. .

[0005]

[Problems to be solved by the device]

 In the case of the backing material 4 described above, in the case of fitting with the square rod 3, since the one that has been cut and processed in the cutting factory is ordered, a great deal of work is required and there is a drawback that the steel material processing cost increases.

At the corners of the four-sided box pillar, since the backing members 4 in two directions orthogonal to each other are combined while avoiding the square rods 3, it is possible to ensure accuracy in this part in terms of manufacturing and construction. There is a problem that it is difficult.

It is an object of the present invention to provide a backing material that requires less labor for cutting and the like and can easily ensure accuracy at the corners of a four-sided box column to be welded.

[0008]

[Means for Solving the Problems]

 INDUSTRIAL APPLICABILITY The backing material of the present invention is a backing material for holding a root gap of a welding groove for axially adding a four-sided box column with a square bar attached to the inside of a corner. Placed inside the four corners of the column and welded with the outer surface of the square rod welded to each other. The L-shaped backing material has an L-shaped horizontal cross section, and the longitudinal ends are in contact with the L-shaped backing material. It consists of a rectangular backing material with one end welded to the inner surface of a four-sided box column.

The L-shaped backing material can be easily manufactured by using a forged product or a casting, and high accuracy can be ensured as the backing material for the corner portion to which the square bar is attached. .

[0010]

【Example】

 Hereinafter, the illustrated embodiment will be described.

FIG. 2 and FIG. 3 show an outline of welding of a four-sided box column common to the conventional example. When the upper and lower four-sided box columns 1 and 2 are joined together, the upper box column 1 is preliminarily connected. The groove 6 is processed, the backing material 4 is attached to the inside of the groove 6 to secure a root interval, and welding is performed along the outer circumference of the joint. In the figure, 7 is a seal bead and 8 is a facing part.

1 (a) and 1 (b) are bottom views of an upper box column 1 to which backing materials 4a and 4b are attached and a perspective view of a main part thereof, in an embodiment of the present invention. Is. In FIG. 1 (a), the L-shaped backing material 4a at the corners is hatched for distinction. Further, in FIG. 1 (b), the rectangular backing material 4b is shown by an imaginary line.

In the present embodiment, the L-shaped backing material 4a obtained by forging is used as the backing material to be fitted to the square rod 3, and the rectangular band-shaped backing material 4b is used in the middle portion.

First, the L-shaped backing material 4a is attached to the outer surface of the square rod 3 by welding. There, the accuracy of the four corners is determined. Next, the backing material 4b is fitted between the L-shaped backing materials 4a and attached to the inner surface of the four-sided box column 1 by spot welding 5 or the like.

With the above work, the attachment of the backing materials 4a and 4b is completed, and the upper and lower four-sided box columns 1 and 2 are welded at the construction site as shown in FIGS. 2 and 3 described above. .

[0016]

[Effect of device]

 The following effects can be obtained by using the backing material of the present invention.

By facilitating the cutting process of the backing material in a cutting factory or the like, it is possible to save the processing labor and reduce the cost.

In a steel frame manufacturing factory or the like, the workability can be improved and the accuracy of the backing material for the corners can be improved.

The accuracy of the groove shape at the erection site can be improved, which leads to the reduction of defective spots in the site welding.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (a) is a bottom view and (b) is a perspective view of an essential part (upside down when welding).

FIG. 2 is a vertical cross-sectional view showing an outline of a erection site welded portion of a four-sided box column.

FIG. 3 is a vertical sectional view showing details of a field welded portion.

FIG. 4 is a perspective view showing an engagement of a conventional backing material with a square bar (upside down when welding is performed).

[Explanation of symbols]

1, 2 ... 4-sided box column, 3 ... Square bar, 4 ... Backing material, 4
a ... L-shaped backing material, 4b ... Rectangular backing material, 5 ... Spot welding, 6 ... Groove, 7 ... Seal bead, 8 ... Facing part

Claims (1)

[Scope of utility model registration request] 1. A welding groove for axially adding a four-sided box column to which a backing material made of a square bar for corner welding when manufacturing a four-sided box steel is attached inside the corner. An L-shaped backing material having a L-shaped horizontal cross-section, which is a backing material for maintaining a root distance, and is arranged inside the four corners of the four-sided box column and welded with its outer surface aligned with the square rod, and both ends in the longitudinal direction. Is arranged so as to be in contact with the L-shaped backing material, and is composed of a rectangular backing material having one end in the width direction welded to the inner surface of the four-sided box pillar. Material.