Title:
FASTENING STRUCTURE
Document Type and Number:
Japanese Patent JP2017125568
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fastening structure which is capable of obtaining an anti-unfastening effect for a member for fastening, further, the structure of which is not complicated and in which a bolt is prevented in principle from being damaged by a washer.SOLUTION: A fastening structure 1 comprises: fastened bodies 5 and 6; a bolt 2; a washer 3 including a central protrusion 32 which is axially symmetric and has a substantially trapezoidal cross-sectional shape and in which a bolt insertion hole 33 is formed; and a nut 4 including a central projection 42 which is axially symmetric and in which one opening of a female screw part 41 is formed. A male screw part 22 in the bolt 2 is threaded to the female screw part 41 of the nut 4, a peripheral edge 33a of the bolt insertion hole 33 in the washer 3 is brought into contact only with the central projection 42 of the nut 4 and the bolt insertion hole 33 is made eccentric from a central axis W of the central protrusion 32 in the washer 3, such that the nut 4 receives a force from the washer 3 in an asymmetrical manner and is tilted relatively to the bolt 2.SELECTED DRAWING: Figure 1
Inventors:
NAKAGAMI TERUO
Application Number:
JP2016005258A
Publication Date:
July 20, 2017
Filing Date:
January 14, 2016
Export Citation:
Assignee:
WEDGICO CO LTD
International Classes:
F16B39/02; F16B39/24; F16B39/284; F16B43/00
Domestic Patent References:
| JP2013213523A | 2013-10-17 | |||
| JPS5231265A | 1977-03-09 | |||
| JPH042623Y2 | 1992-01-29 | |||
| JPH11315820A | 1999-11-16 |
Attorney, Agent or Firm:
Tsuneo Fujikawa
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