| 摘要 |
PROBLEM TO BE SOLVED: To provide a caster which is easily fixed to a mounting object by screwing a threaded part provided at the top of a main shaft into a threaded hole of a mounting subject. SOLUTION: The main shaft 4 is projected downward from a body 3 and a hexagon hole 15 for a rotating operation is provided at its lower end. When the threaded part for mounting 9 at the top of the main shaft 4 is screwed into the mounting subject 21, a rotating operation by using a tool for the hexagon hole 15 is made possible at a workspace under the body 3 which has relatively large degree of freedom. The large workspace enables prompt completion of tightening work by using a general tool instead of a dedicated tool.
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