Title:
CYLINDRICAL SHAFT AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/098183
Kind Code:
A1
Abstract:
A cylindrical shaft formed of a bent sheet metal (10) and a method of manufacturing the cylindrical shaft. The cylindrical shaft (20) comprises projected parts (16) projected from one end part (12) of the pair of joined end parts (12) and (14) of the sheet metal (10) and having portions which increase in width apart from the one end part (12) and recessed parts (18) formed in the other end part (14) of the pair of joined end parts, having such a shape that supplementarily matches that of the projected parts (16), and fitted to the projected parts (16). Thus, the cylindrical shaft high in roundness, less in both vertical and lateral warpages, and excellent in linearity can be provided.
Inventors:
YANOKURA ITARU (JP)
HASHIZUME HIROSHI (JP)
NOMURA NORIO (JP)
TAKASHIMA NAGAMITSU (JP)
HASHIZUME HIROSHI (JP)
NOMURA NORIO (JP)
TAKASHIMA NAGAMITSU (JP)
Application Number:
PCT/JP2006/304294
Publication Date:
September 21, 2006
Filing Date:
March 06, 2006
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
YANOKURA ITARU (JP)
HASHIZUME HIROSHI (JP)
NOMURA NORIO (JP)
TAKASHIMA NAGAMITSU (JP)
YANOKURA ITARU (JP)
HASHIZUME HIROSHI (JP)
NOMURA NORIO (JP)
TAKASHIMA NAGAMITSU (JP)
International Classes:
B21C37/06; B21D39/03
Foreign References:
| JP2004001003A | 2004-01-08 | |||
| JPS5543360A | 1980-03-27 | |||
| JPH11156440A | 1999-06-15 |
Attorney, Agent or Firm:
Ryuka, Akihiro (22-1 Nishi-Shinjuku 6-chom, Shinjuku-ku Tokyo, JP)
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