Title:
パイプ材の溝部成形方法
Document Type and Number:
Japanese Patent JP4477695
Kind Code:
B1
Abstract:
The present invention provides a slot part forming method for pipe, thereby forming the slot part with a mode that a R shape at the upper end of the inner wall is smaller and an actual slot depth can be increased. The forming method is used for forming slots (61,62) on an outer peripheral surface of the pipe (60) for headrest. A first pressing edge is a rectangular edge (52) in which a left side surface and a right side surface (52a,52b) are vertical with an axial direction and a width in a left-and-right direction is larger than the width between a left inner wall and a right inner wall (72a,72b) of a dent part (72). Furthermore a second pressing edge is an inclined edge (51) which has a right side surface (51b) that is vertical with the axial direction. Furthermore, the depths of the dent part (72) and a large width dent part (71) are formed so an inner circumferential surface of the pipe (60) for headrest does not contact with the bottom surfaces (72c,71c) of the dent part (72) and the large width dent part (71). When the left side surface and the right surface (52a,52b) of the rectangular edge (52) are respectively provided at the left side and the right side of the left inner wall and the right inner wall (72a,72b), and the right side surface (51b) of the inclined edge (51) is provided behind the right outer part of the right inner wall (71b) of the large width dent part (71), the punching cutting is performed.
Inventors:
Shigeo Oda
Application Number:
JP2009242897A
Publication Date:
June 09, 2010
Filing Date:
October 21, 2009
Export Citation:
Assignee:
Oda Gisho Co., Ltd.
International Classes:
B21D17/02; B21D53/88; B60N2/48
Domestic Patent References:
| JP2000079422A | ||||
| JP59033034A | ||||
| JP2002011524A | ||||
| JP11197753A | ||||
| JP2006218489A | ||||
| JP52101748U | ||||
| JP2006181613A | ||||
| JP11254055A | ||||
| JP2003159143A | ||||
| JP635829A | ||||
| JP2001300647A | ||||
| JP61107677A |
Foreign References:
| WO2007043625A1 | ||||
| US7424817 |
Attorney, Agent or Firm:
Patent business corporation Yamahiro patent office