CRADLE FOR CONNECTING SCREW COUPLING STEEL PIPE

摘要

PROBLEM TO BE SOLVED: To automatically correct center displacement in connection of screw coupling steel pipes. SOLUTION: A cradle for connecting the screw coupling steel pipes is used for the connection of the screw coupling steel pipes where a male screw is formed on the outer peripheral surface of one end part and a female screw is formed in the inner peripheral surface of the other end part. The cradle for connecting the screw coupling steel pipes comprises cradles 3 with a pair of spherical seats or rotary rollers 2; a pair of support bodies 4 to vertically movably support the respective cradles 3 with the pair of spherical seats or rotary rollers 2; and a base board 6 at which the pair of support bodies 4 are fixed.