JPS61167289U

JPS61167289U -

Info

Publication number: JPS61167289U
Application number: JP5105585U
Authority: JP
Priority date: 1985-04-08
Filing date: 1985-04-08
Publication date: 1986-10-17

Description

[Brief explanation of the drawing]

第１図は本考案の裏当リングの平面図、第２図
は本考案の裏当リングの正面図、第３図は本考案
裏当リングの取付断面拡大図、第４図と第５図は
本考案の裏当リングの使用例を示す図、第６図は
従来から使用されている裏当リングの一般的例を
示す図、第７図は従来の裏当リングを保持するた
め鋼管内面に溶接固定されるストツパー、第８図
は従来の中継溶接時の断面、第９図は下杭と上杭
の接合部にルートギヤツプを確保するための一例
を示す断面図である。１……裏当リング本体、２……裏当リング端ズ
レ防止板、３……ストツパー、４……上杭、５…
…下杭、６……裏当リング突起部、７……突起部
押し曲げ加工後の穴、８……裏当リング上部、９
……裏当リング底部、１０……裏当リング端部、
１１……ルートギヤツプ。 Figure 1 is a plan view of the backing ring of the present invention, Figure 2 is a front view of the backing ring of the present invention, Figure 3 is an enlarged cross-sectional view of the backing ring of the present invention, and Figures 4 and 5. 6 is a diagram showing an example of the use of the backing ring of the present invention, FIG. 6 is a diagram showing a general example of a conventional backing ring, and FIG. FIG. 8 is a cross-sectional view showing a conventional relay welding process, and FIG. 9 is a cross-sectional view showing an example of securing a root gap at the joint between a lower pile and an upper pile. 1...Backing ring main body, 2...Backing ring end slippage prevention plate, 3...Stopper, 4...Upper stake, 5...
... Lower stake, 6 ... Backing ring projection, 7 ... Hole after pressing and bending the projection, 8 ... Upper part of backing ring, 9
... Backing ring bottom, 10... Backing ring end,
11...Root gap.

Claims

[Scope of utility model registration request]

In a backing ring consisting of a straight part and an inclined part,
Several places on the circumference of the linear part of the ring are punched out at right angles from the inside to the outside and bent to form protrusions, and the protrusions are sandwiched between the upper stake and the lower stake to fix the backing ring. A welded backing ring for a steel pipe, characterized in that it has a root gap holding function.