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Patent Searching and Data


Title:
FALLING PREVENTION DEVICE FOR FASTENING NUT
Document Type and Number:
Japanese Patent JP2016161127
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a falling prevention device for a fastening nut capable of preventing a nut fastened to a bolt, from being loosened by vibration and falling from the bolt.SOLUTION: In a restriction member 4 mounted on a bolt 3 for preventing falling of a fastening nut 2 loosened by vibration, the restriction member 4 is composed of a polygonal cylindrical body 5 having a bolt through hole 6 at the center, and a coil spring 10 accommodated in the bolt through hole 6. The coil spring 10 is composed of a coil portion 10a matching to pitches of a male screw 3a of the bolt 3, a fixed end portion at one end of the coil spring, extended outward from an outer periphery of the coil portion, and supported by a locking portion disposed on the cylindrical body, and a free end portion 10c at the other end of the coil spring 10, faced outward from an opening 8 formed on the other end face 5a of the cylindrical body 5.SELECTED DRAWING: Figure 1

Inventors:
SUZUKI YASUYUKI
ARA HITOSHI
Application Number:
JP2015052632A
Publication Date:
September 05, 2016
Filing Date:
February 27, 2015
Export Citation:
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Assignee:
SUZUKI YASUYUKI
TECHNOCRAT:KK
International Classes:
F16B41/00; F16B39/20