TUBE END MEMBER, FLANGE TUBE, BAND JOINT STRUCTURE FOR FLANGE TUBE, AND METHOD FOR MANUFACTURING TUBE END MEMBER

WIPO Patent Application WO/2020/208994

A1

A tube end member (2) to be provided to the end of a flange tube (1) comprises: a cylindrical part (21) that can be fitted to the end of the tube body (3) of the flange tube (1); a flat part (22) that is formed by bending the end of the cylindrical part (21) outwards at a substantially right angle at the opposite end to the end at which the cylindrical part (21) is fitted to the tube body (3); and extending part (23) that is formed by bending the outer end of the flat part (22) at a substantially right angle towards the cylindrical part (21); a taper part (24) that extends at an angle from the leading edge of the extending part (23) so as to approach the cylindrical part (21); and a folded back part (25) folded back from the leading edge of the taper part (24) into a space (S) enclosed by the cylindrical part (21), the flat part (22) and the extending (23), the leading edge of the folded back part (25) abutting the taper part (24) so as to bias the taper part (24) outwards. The manufacturing cost of the flange tube can be reduced, the manufacturing efficiency can be increased, and the flange tube can be made lighter. Moreover, the accuracy required for the taper part and the flat part of a flange of a flange tube can be reliably obtained, and said accuracy can be stably maintained.

WO/2005/114026

DEFORMABLE MECHANICAL PIPE COUPLING

TAKAHASHI YOSHIYUKI (JP)
ARAI HIDEAKI (JP)

PCT/JP2020/010516

October 15, 2020

March 11, 2020

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SANKEI GIKEN KOGYO CO LTD (JP)
VISTA CO LTD (JP)

F16L23/04; B21D19/12; B21D51/16

JP2006144871A	2006-06-08
JPS63280990A	1988-11-17
JP2017074614A	2017-04-20
JPS56133914U	1981-10-12

MOTOI Shigeyuki (JP)

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