Title:
SCREW LOCKING STRUCTURE
Document Type and Number:
Japanese Patent JP2023035945
Kind Code:
A
Abstract:
To provide a locking structure capable of determining whether or not fastening with a designed axial force is maintained surely on appearance.SOLUTION: A locking structure consists of a hexagon nut 30 and a washer 20 in a hexagon nut shape. A plurality of inclined places 21 and 31 are formed on a top face of the washer and a seating face of the hexagon nut. Each of the plurality of inclined planes is inclined in such a manner that a top face height of the washer at an advance side in a screw fastening direction becomes low with respect to the hexagon nut and a seating face height of the hexagon nut at the advance side in the screw fastening direction becomes high with respect to the washer. Engagement step parts are formed in an inclined plane end at the side where the top face height of the washer is made low and in an inclined plane end at the side where the seating face height of the hexagon nut is made high. The washer and the hexagon nut can be mutually turned together in the fastening direction by mutually engaging the engagement step parts. The rotation of the washer in a loosening direction is regulated by a fastening axial force generated by pushing and contacting a joined member with the washer pushed and contacted to the hexagon nut. Spiral rotation of the hexagon nut at a lead angle in the loosening direction is regulated by the inclined planes of the washer and the hexagon nut.SELECTED DRAWING: Figure 5
Inventors:
HAMANAKA SHIGENOBU
Application Number:
JP2022134147A
Publication Date:
March 13, 2023
Filing Date:
August 25, 2022
Export Citation:
Assignee:
HAMANAKA NUT CO LTD
International Classes:
F16B39/24; F16B39/282
Attorney, Agent or Firm:
Hisao Ishii
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