| 摘要 |
PROBLEM TO BE SOLVED: To provide a looseness preventive device of a handle shaft capable of surely preventing looseness of the handle shaft to shaft installing holes over a long period, capable of easily inserting the handle shaft into the shaft installing holes, and reducing a manufacturing cost. SOLUTION: An installing part 30 is formed of a stepped hole opening in a first surface 20 and a second surface 21 of the handle shaft 4, and having a level difference part 33 between a large diameter part 31 and a small diameter part 32. A looseness preventive member 40 composed of a hard resin is fitted to and installed in the installing part 30 in a stepped shaft shape having a level difference part 43 between a large diameter part 41 and a small diameter part 42. An end surface 41a of the large diameter part 41 projects from the first surface 20, and is brought into pressure contact with one inside surface of the shaft installing holes 8 and 13, and an end surface 42c of the small diameter part 42 projects from the second surface 21, and is brought into pressure contact with the other inside surface of the shaft installing holes 8 and 13 to prevent the looseness of the handle shaft 4.
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