| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress generation of abrasion powder from a second rod packing positioned in a tip side of a rod than an accumulation part, and to reduce power consumption. Ž<P>SOLUTION: The pneumatic device 11 is equipped with an air cylinder 13, and an ejector 38 provided outside the air cylinder 13. The rod 20 is pierced through an end wall part 15 of a cylinder housing 16. A through-hole 21 of the end wall part 15 pierced by the rod 20 is provided with a first rod packing 23, the accumulation part 26, and the second rod packing 29 in sequence from a second cylinder chamber 19 side. Air in the accumulation part 26 is sucked by the ejector 38. When the ejector 38 is sucking in the air in the accumulation part 26, force i a separating direction with respect to the rod 20 acts on an inner circumference side lip part 31 of the second rod packing 29, and the inner circumference side lip part 31 of the second rod packing 29 is deformed in a direction separating away from the rod 20. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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