Title:
NON-LOOSENING BOLT
Document Type and Number:
WIPO Patent Application WO/2021/177384
Kind Code:
A1
Abstract:
Provided is a bolt that is unlikely to break, in a lockbolt with which tightening jobs can be carried out simply and quickly, and which yields a strong and reliable anti-loosening effect. Provided is a non-loosening bolt comprising a first bolt 11 having a bolt head and a second bolt 12 having a bolt tip, obtained by slicing the shaft of a single bolt in two at right angles to the shaft along the middle, the second bolt 12 having formed on a slice surface 122 thereof an eccentric columnar part 123 which is off-centered by a small amount, and the first bolt 11 having formed on a slice surface 112 thereof a small-diameter threaded hole 114 which is off-centered by a small amount and which is screwed together with the eccentric columnar part 123, wherein the non-loosening bolt is characterized in that a frustum-shaped protrusion 126 is provided between the slice surface 122 and the eccentric columnar part 123 of the second bolt 12, and a frustum-shaped hole 116 into which the frustum-shaped protrusion 126 fits is provided between the slice surface 112 and the small-diameter threaded hole 114 of the first bolt 11.
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Inventors:
TOKUMOTO TOSHIMITU (JP)
Application Number:
PCT/JP2021/008298
Publication Date:
September 10, 2021
Filing Date:
March 03, 2021
Export Citation:
Assignee:
TOKUMOTO TOSHIMITU (JP)
International Classes:
F16B35/00; F16B39/28
Foreign References:
| JP6640967B1 | 2020-02-05 | |||
| JP2010043678A | 2010-02-25 | |||
| JP3186719U | 2013-10-24 | |||
| JPS4849461U | 1973-06-28 | |||
| JP3187298U | 2013-11-21 | |||
| JP2018040495A | 2018-03-15 | |||
| JP2020183772A | 2020-11-12 |
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