Title:
SUPPORTING BAR AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2001239340
Kind Code:
A
Abstract:
To provide a stable press forming for engaging concave portions of a supporting bar used for a headrest or a hand brake, without producing an extruding metal padding on an outer surface.
An engaging concave portion 3 produced in a pipe material is formed to also have a concave shape at right angle direction against a center axis of a pipe material 4. The concave portion produced at right angle direction against the center axis of the pipe material 4 has a smooth, continuous concavely curved surface.
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Inventors:
NAKANE HIDETOSHI
TAKEDA NOBUHIKO
TAKEDA NOBUHIKO
Application Number:
JP2000054235A
Publication Date:
September 04, 2001
Filing Date:
February 29, 2000
Export Citation:
Assignee:
AISIN SEIKI
International Classes:
B21D17/02; B21D22/02; B21D22/04; B21D37/00; B21D53/88; B60N2/48; A47C7/38; (IPC1-7): B21D53/86; B21D22/02; B21D22/04; B21D37/00
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