Construction for preventing a disengagement of a sealing packing and a cover provided therewith

摘要

An arcuate sealing packing (10) has disengagement restraining projections (11) that project on the outer circumferential surface of opposite ends of the arcuate packing (10). The arcuate packing (10) is mounted an arcuate portion (R) of a cover (C). The disengagement restraining projections (11) are fitted inside restraining surfaces (33) of the cover (C). Thus, even if a force acts on the end of the arcuate packing (10) in a disengaging direction the outer circumferential surfaces of the disengagement restraining projections (11) contact the restraining surfaces (33A) to restrain the end from disengaging in the radially outward direction. Thus, the arcuate packing (10) does not easily disengage.