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Title:
JOINING STRUCTURE OF PIPE MATERIAL AND MOUNTING WASHER
Document Type and Number:
Japanese Patent JP2013066935
Kind Code:
A
Abstract:

To provide a joining structure between a pipe material and a mounting washer with an excellent joining quality and a handrail member using the joining structure.

The joining structure is a junction structure of a mounting washer to join a mounting washer to a tip portion of a pipe material. The mounting washer has a junction section into which the tip portion of the pipe material is inserted. The junction section has an insert section which substantially conforms with an outer diameter of the pipe material and a diametrically expanded section which has an inner diameter diametrically expanding in the direction of a tip side. The junction section is subjected to flared-swage joining through the process of inserting the tip portion of the pipe material into the junction section of the mounting washer and then diametrically expanding the relevant tip portion along the diametrically expanded section by swaging. The junction section is spot-welded in at least one location.


Inventors:
HARADA HITOSHI
Application Number:
JP2012175480A
Publication Date:
April 18, 2013
Filing Date:
August 08, 2012
Export Citation:
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Assignee:
KATAYAMA KOGYO CO LTD
International Classes:
B21D39/00; B21D19/08
Domestic Patent References:
JPH0341113U1991-04-19
JP2008110349A2008-05-15
JPH06254637A1994-09-13
Attorney, Agent or Firm:
Kaichi Otani