| 摘要 |
PROBLEM TO BE SOLVED: To provide a caster capable of easily moving a supporting body of a refrigerator and smoothly performing a height adjustment of the supporting body. SOLUTION: A leg body for height adjustment is mounted on a roller supporting frame for supporting a roller. The leg body is formed by an adjust bolt 11 screw-engaged to a screw hole provided on the roller supporting frame, a knob 12 for making a head part 11a of the adjust bolt 11 as an insert and a base 14 fitted into a base fitting recessed part 13 formed on the knob 12 and relatively rotatably supported. A ball 19 made of a steel ball is incorporated between the base 14 and the knob 12. By bringing the ball 19 into point contact with the head part 11a of the adjust bolt 11, a rotating operation of the knob 12 is smoothened.
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