| 摘要 |
PROBLEM TO BE SOLVED: To provide the structure of an air caster 1 capable of preventing leaving scratches on the floor surface when moving on a finely finished floor surface and even when stopped for long period. SOLUTION: An annular expandable diaphragm 3 is installed on the lower surface of a base plate for placing a load thereon, and an air membrane is formed between the lower surface of the diaphragm 3 and the floor surface by supplying compressed air into the annular diaphragm 3 and a space surrounded by the diaphragm 3. An annular circular cloth 4 is installed on the lower surface of the annular diaphragm 3.
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