| 摘要 |
A sealing device (4) for a reciprocating shaft capable of providing sufficient pressure tightness to a main lip (42) and preventing the troublesomeness of assembling operation. The sealing device interposed between the shaft (1) and the end part of an outer peripheral member (2) comprises a washer (41), the main lip (42) disposed on the sealed space (A) side of the washer (41) and slidably fitted to the outer peripheral surface (1a) of the shaft (1), an auxiliary lip (43) integrally formed on the outer peripheral side thereof, a backup ring (44) fitted between the inner peripheral part of the main lip (42) and the inner peripheral part of the washer (41) and pivotally supporting the main lip (42) from the atmosphere (B) side and the inner peripheral side, a dust lip (45) joined integrally with the atmosphere (B) side of the washer (41) and slidably fitted to the outer peripheral surface (1a) of the shaft (1), and an outer peripheral lip (46) joined integrally with the outer peripheral part of the washer (41) and fitted to the inner peripheral surface of the outer peripheral member (2).
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