Title:
CRIMP SECURING STRUCTURE OF BOLT, CRIMP SECURING METHOD FOR CRIMP BOLT, AND CRIMPING DIE
Document Type and Number:
WIPO Patent Application WO/2021/255912
Kind Code:
A1
Abstract:
The present invention is a crimp securing structure of a bolt, the structure being such that a crimp bolt 10 in which a crimping recess 13 is provided in the upper surface of a top part is secured by crimping to a metal sheet 30. The present invention is characterized in that the thickness of a metal material press-fitted into the crimping recess 13 of the crimp bolt is reduced at a central section so as to be less than that at a peripheral edge section of the crimping recess 13. In order to obtain this crimp securing structure, a crimping die 20 in which a stress-relief recess 23 is formed at a protruding central section is used to prevent the occurrence of excessive localized stress in the crimping recess 13.
Inventors:
KITAJIMA DAN (JP)
KOGA KAZUHIRO (JP)
KATSUMATA YUICHI (JP)
KOGA KAZUHIRO (JP)
KATSUMATA YUICHI (JP)
Application Number:
PCT/JP2020/024098
Publication Date:
December 23, 2021
Filing Date:
June 19, 2020
Export Citation:
Assignee:
AOYAMA SEISAKUSHO (JP)
International Classes:
B21D39/00; F16B35/04
Domestic Patent References:
| WO2012165151A1 | 2012-12-06 |
Foreign References:
| JPH10213108A | 1998-08-11 | |||
| JPH03260407A | 1991-11-20 | |||
| JPH07167128A | 1995-07-04 | |||
| JP2017155860A | 2017-09-07 | |||
| JP2004324813A | 2004-11-18 | |||
| JP2019138308A | 2019-08-22 |
Attorney, Agent or Firm:
NAJIMA PATENT OFFICE (JP)
Download PDF:
Previous Patent: TRANSMITTER, RECEIVER, SPATIAL OPTICAL FREQUENCY TRANSMISSION SYSTEM, AND SPATIAL OPTICAL FREQUENCY ...
Next Patent: SCREW COMPRESSOR
Next Patent: SCREW COMPRESSOR