JACK UP RIG AND ELEVATING DEVICE FOR JACK UP RIG

摘要

The legs may be raised and lowered with less driving force, and the legs may be fixed together with the legs to be raised and lowered, and a plurality of legs that are movable up and down on the hull and the hull so that a separate device for fixing the legs is not required, It includes a lifting device installed on the hull for lifting and lowering the leg, the lifting device is a frame installed on the hull, spaced apart from the frame and the clamping member is moved in the longitudinal direction of the leg, for selectively fixing the clamping member to the leg It provides a jack-up rig including a fixed portion, an expansion and contraction drive unit is provided between the frame and the clamping member to expand and contract the gap between the frame and the clamping member.