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Patent Searching and Data


Title:
SEAT FRAME, SEAT STRUCTURE, AND METHOD OF MANUFACTURING SEAT FRAME
Document Type and Number:
Japanese Patent JP2007312796
Kind Code:
A
Abstract:

To provide a highly strong seat structure manufacturable at low cost by utilizing a seat frame having pipe parts formed by bending sheet metal materials.

The seat frame 10 comprises the pipe parts 210, 220, and 230 formed by forming the sheet metal materials in roughly cylindrical shapes and welding at least a part of end edges. The pipe parts 210, 220, and 230 partially comprise portions 210b, 220b, and 230b formed in recrystal grain structures refined by a heat treatment and a strain processing at the time. Since the pipe parts partially comprise the portions formed in the recrystal grain structures, the strengths and yield stresses of the portions are increased, and the deformation and damage of the pipe parts due to the embrittlement of weld parts can be reduced irrespective of the fact that the pipe parts are formed by forming the sheet metal materials in the roughly cylindrical shapes. As a result, since extrudedly molded hollow pipe materials must not be used, the seat frame can be manufactured at low cost.

COPYRIGHT: (C)2008,JPO&INPIT


Inventors:
FUJITA YOSHINORI
TAKADA YASUHIDE
KIYOMITSU ISAO
Application Number:
JP2004241897A
Publication Date:
December 06, 2007
Filing Date:
August 23, 2004
Export Citation:
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Assignee:
DELTA TOOLING CO LTD
DELTA KOGYO CO LTD
International Classes:
A47C5/04; A47C7/00; A47C7/02; B21C37/15
Attorney, Agent or Firm:
麦島 隆