Title:
HOLLOW CYLINDRICAL MEMBER
Document Type and Number:
WIPO Patent Application WO/2014/167686
Kind Code:
A1
Abstract:
[Problem] To provide a hollow cylindrical member such that material cost can be reduced by increasing material yield in forming a clinch portion.
[Solution] A collar member (60) as a hollow cylindrical member is formed by bending a strip-shaped sheet material (61). A first clinch portion (70) of the collar member includes a recess (72) with an insertion opening (71) opening on a first abutting end surface (63), and a locking portion (73) disposed in the recess and locking a second clinch portion (80). The first clinch portion is formed without extending beyond the first abutting end surface. The second clinch portion protrudes outward beyond the second abutting end surface (64), and is provided with a projection (81) fitted in the recess of the first clinch portion. The projection of the second clinch portion, when the first and second abutting end surfaces are abutted on each other from a circumferential direction, is plastically deformed in a direction along the second abutting end surface while being inserted into the recess via the insertion opening and locked in the locking portion.
Inventors:
UCHIYAMA YUJI (JP)
Application Number:
PCT/JP2013/060918
Publication Date:
October 16, 2014
Filing Date:
April 11, 2013
Export Citation:
Assignee:
YOROZU JIDOSHA KOGYO KK (JP)
International Classes:
B60G7/00; B21D5/01; B21D39/03; F16F15/08
Foreign References:
| US2283918A | 1942-05-26 | |||
| JPS60145639U | 1985-09-27 | |||
| JPH11210713A | 1999-08-03 |
Attorney, Agent or Firm:
HATTA & ASSOCIATES (JP)
Hatta international patent business corporation (JP)
Hatta international patent business corporation (JP)
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