REVERSE ROTATION PREVENTION STRUCTURE FOR SCREW BODY

Title:

REVERSE ROTATION PREVENTION STRUCTURE FOR SCREW BODY

Document Type and Number:

Japanese Patent JP2017062040

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To surely prevent, in a simple structure, a screw body from being rotated in a specific direction.SOLUTION: The present invention relates to a structure for fastening a fastened member 80 by a male screw body 10 and a washer 50. In the male screw body 10, a screw body side seat part 22 is formed, at a side of the washer 50, a first receiving part 60 and a second receiving part 70 are formed and in the fastened member 80, a member side seat part 82 is formed. Between the first receiving part 60 and the screw body side seat part 22, a first engage mechanism A is formed. When at least the screw body side seat part 22 attempts to rotate in a direction in which the male screw body 10 in a fastened state is unfastened, the first receiving part 60 and the screw body side seat part 22 are engaged with each other and prevented from being rotated relatively. Between the member side seat part 82 and the second receiving part 70, a second engage mechanism B is formed. When at least the washer 50 attempts to rotate in a direction in which the washer is unfastened, the first receiving part 70 and the member side seat part 82 are engaged with each other and prevented from being rotated relatively. By actions of the first engage mechanism A and the second engage mechanism B, the male screw body 10 and the fastened member 80 are prevented from being unfastened.SELECTED DRAWING: Figure 1

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Inventors:

MICHIWAKI YUTAKA

Application Number:

JP2016216139A

Publication Date:

March 30, 2017

Filing Date:

November 04, 2016

Export Citation:

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Assignee:

NEXT INNOVATION COMBINATION CO
NEJILAW INC

International Classes:

F16B43/00; F16B39/24

Domestic Patent References:

JP2006336809A	2006-12-14
JPS4419654B1
JPS4830770Y1	1973-09-19
JPS58118308U	1983-08-12
JPS5076259U	1975-07-03
JP2006068179A	2006-03-16
JPS60133215U	1985-09-05
JPS5121068U	1976-02-16
JPS6386103U	1988-06-06
JPS4717055U	1972-10-27
JPS5159759U	1976-05-11
JPS4828996Y1	1973-09-03
JPS382673B1
JPH10306819A	1998-11-17

Attorney, Agent or Firm:

Masashi Sahara
Kazuki Yokota

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