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Patent Searching and Data


Title:
FASTENING TOOL
Document Type and Number:
WIPO Patent Application WO/2018/003023
Kind Code:
A1
Abstract:
Provided is a fastening tool which can be reliably held in a fastened state when fastening is desired, and which can be easily loosened when loosening is desired. A second nut 11 having a hexagonal outer periphery is disposed so as to cover a first nut 9. Between the bottom surface 11b of a cavity 13 and the left end 11d of the second nut 11, an inclined surface 11c is formed in the shape of a circular truncated cone at an angle α (> 0°) to the horizontal around a shaft 7A. The inclined surface 11c is formed 360 degrees around a point P, which deviates by a deviation δ from the center point O of the shaft 7A. Thus, for example, with the corner c1 of the first nut 9 in an abutting relation with the inclined surface 11c, the corners c2, c3, c4, c5, and c6 of the first nut 9 are not in an abutting relation with the inclined surface 11c. Therefore, an unbalanced force acts between the first nut 9 and the shaft 7A of a bolt 7 and between the second nut 11 and the shaft 7A of the bolt 7.

Inventors:
SATO, Gaku (7-17-18, TsudanumaNarashino-sh, Chiba 16, 〒2750016, JP)
Application Number:
JP2016/069183
Publication Date:
January 04, 2018
Filing Date:
June 28, 2016
Export Citation:
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Assignee:
SATO, Gaku (7-17-18, TsudanumaNarashino-sh, Chiba 16, 〒2750016, JP)
International Classes:
F16B39/12
Attorney, Agent or Firm:
SHIINA, Masatoshi (Hayashi Bldg. 2F, 10-9 Hatchobori 4-chome, Chuo-k, Tokyo 32, 〒1040032, JP)
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