Title:
LOCKING FASTENER
Document Type and Number:
Japanese Patent JP2020024027
Kind Code:
A
Abstract:
To provide a locking fastener excellent in loosening prevention function.SOLUTION: A locking fastener 1 includes a bolt 10 which has a large-diameter shaft part 12 provided with a large-diameter male screw part 12a, and a small-diameter shaft part 13 provided with a small-diameter male screw part 13a, a first nut 20 provided with a large-diameter female screw part 20a which can screw the large-diameter male screw part 12a, a second nut 30 which can screw small-diameter male screw part 13a and has a small-diameter female screw part 30a of an inner diameter smaller than the large-diameter female screw part 20a, and a connecting nut 40 provided with a female screw part 41a which can screw a first outer circumferential male screw part 20b provided on an outer circumferential surface of the first nut 20 and a second outer circumferential male screw part 30b provided on an outer circumferential surface of the second nut 30. Therein, screw direction of the first outer circumferential male screw part 20b and the second outer circumferential male screw part 30b is the same with screw direction of the large-diameter male screw part 12a and, when the first nut 20 and the second nut 30 are clamped into the bolt 10, the connecting nut 40 is screwed to the first nut 20 and the second nut 30.SELECTED DRAWING: Figure 1
Inventors:
KINOSHITA TETSUO
Application Number:
JP2018149806A
Publication Date:
February 13, 2020
Filing Date:
August 08, 2018
Export Citation:
Assignee:
KINOSHITA TETSUO
International Classes:
F16B39/18; F16B35/00
Attorney, Agent or Firm:
Yasushi Koyama
Tetsuo next generation
Tetsuo next generation