Title:
ほぞ穴用ナット増し締め装置
Document Type and Number:
Japanese Patent JP6944913
Kind Code:
B2
Abstract:
To solve a problem of loosening between a bolt and a nut in a mortise used in a wooden building due to drying of wooden parts.SOLUTION: A nut retightening device for a mortise includes a flat-spiral spring 9 that automatically tightens looseness of a nut 10; and a mortise holding frame that allows for easy and safe fitting work.SELECTED DRAWING: Figure 4
Inventors:
Hiromichi Takahashi
Katsumi Takahashi
Keiko Takahashi
Yoko Fukuma
Katsumi Takahashi
Keiko Takahashi
Yoko Fukuma
Application Number:
JP2018167348A
Publication Date:
October 06, 2021
Filing Date:
August 21, 2018
Export Citation:
Assignee:
Hiromichi Takahashi
Keiko Takahashi
Keiko Takahashi
International Classes:
F16B39/02; E04G21/16; E04G23/02
Domestic Patent References:
| JP2004270912A |