Slip-out preventing apparatus for sliding type joint mechanisms

A slip-out preventing apparatus for moveable joint tubular hollow bodies, said slip-out preventing apparatus comprising:

• a housing fitted around outer surfaces of and portions of said joint tubular hollow bodies,
• slip-out preventing covers fixedly coupled around said joint tubular hollow bodies, and
• packing members having lip portions in an opposed state adapted to seal said joint tubular hollow bodies to be joined together by utilizing a fluid pressure inside said tubular bodies, said packing members being provided on inner surfaces of end portions of the housing so as to seal a clearance between said housing and said tubular bodies,
• wherein locking projections are formed on outer surfaces of end portions of said housing, said locking projections being provided on outer surfaces of said tubular bodies,
• wherein the slip-out preventing covers are fixedly coupled around said tubular bodies so as to astride and engage said locking portions with said locking projections, and
• wherein said slip-out preventing covers are provided at end portions thereof with first locking portions being adapted for engagement with said locking projections formed on the end portions of said housing and second locking portions being adapted to be engaged with said locking projections provided on the outer surfaces of the end portions of said housing so that a distance between said first and second locking portions is shorter than a distance between said locking portions on said tubular bodies and opposed end portions of said tubular bodies.