TUBULAR STRUCTURE

WIPO Patent Application WO/2018/235615

A1

Provided is a tubular structure that is easily processed at a construction site and that has an excellent pullout prevention property when coupled, even when the thickness of the tubular structure is small. The present invention is a tubular structure 100 provided with a tubular member 1 at the ends of which annular recesses 12 are formed, and a fitting ring 13 that has two outside surfaces 13c, 13b perpendicular to an axial line A of the tubular member 1, and that is pressed and secured against the outer circumference of the annular recesses 12. The fitting ring 13 is divided into a plurality of arc-shaped members 13a and 13b, and the arc-shaped members 13a and 13b, are coupled to each other by means of coupling members 14. In the coupled state the inner circumference of the fitting ring 13 is shorter than the outer circumference of the annular recesses 12 into which the fitting ring 13 is pressed and secured. Before being coupled the arc-shaped members 13a and 13b are arranged along the outer circumference of the annular recesses of the tubular member 1, and the arc-shaped members are then coupled to each other by means of the coupling members 14, thereby pressing and securing the tubular member 1 against the outer circumference of the annular recesses 12.

NISHIJIMA SHINNOSUKE (JP)
TOMIMURA KOUKI (JP)

PCT/JP2018/021856

December 27, 2018

June 07, 2018

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NISSHIN STEEL CO LTD (JP)

F16L21/06; F16L21/00; F16L21/02; F16L21/08; F16L25/14

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JP2004347045A	2004-12-09
JP3171067U	2011-10-13
JP2014126101A	2014-07-07
JP2003194272A	2003-07-09
JPS53122721U	1978-09-29
JPH09178053A	1997-07-11
JPH0552478U	1993-07-13
US20080111377A1	2008-05-15

HAYASHI Kazuyoshi et al. (JP)

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