| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow cylinder capable of reducing stroke and preventing its prolongation. SOLUTION: A piston 20 having a hollow piston rod 20a protruding outward from a hollow cylinder block 10 is stored in a cylinder chamber 30 formed in the hollow cylinder block 10, two ports 13a, 13b for supplying and discharging compressed air to two pressure chambers 30a, 30b of the cylinder chamber 30 separated from each other by the piston 20 are formed in the cylinder block 10, and the piston 20 reciprocates and slides in the cylinder block 10 due to switching of supply and discharge of compressed air for two pressure chambers 30a, 30b.
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