To constantly provide high positional precision in the case of carrying out tightening work of a bolt several times or in the case of fixing a member after repeating fine adjustment of a fixing position of a fixed member, etc., in fastening the member.
A shape of a screw hole for fixing is made to be a ring as a region to be a ring recessed part relative to a fixing surface of a fixing member on which the screw hole is provided continued in the screw hole on an outer edge part of an opening part of the screw hole. In this case, when an inside diameter of a through hole provided on fastening member is specified as Φa and a nominal diameter of the screw hole as (b), width (c) of a recessed part in the radial direction of the screw hole satisfies a relation of 0.5×(Φa-b)≤c≤2.0×(Φa-b).
| JPH1148059 | OPERATION UNIT |
| JPH06266141 | ELECTROPHOTOGRAPHIC SENSITIVE BODY |
| JP2901329 | [Title of Invention] Cutting Fluid Scattering Prevention Cover |
TAJIMI HIDEYUKI
MIZUMURA YOSHINORI
