SEGMENT POSITIONING DEVICE

PROBLEM TO BE SOLVED: To provide a segment positioning device capable of easily positioning a segment and simplifying a hydraulic piping system and a hydraulic control system. SOLUTION: This segment positioning device is provided with a support body 40 rigidly fixed to a rear drum 5 of a shield machine; a swing body 41 facing the rear end face of the support body 40; a parallel manipulator 42 having a plurality of hydraulic cylinders 43a-43f extending in the approximately longitudinal direction of the shield machine and connecting the swing body 41 swingingly to the support body 40; a rotating body 45 coaxially mounted to the swing body 41 and rotatable in the circumferential direction of the shield machine; and a grip mechanism 22 fitted to the rotating body 45 and capable of gripping the segment. The segment is conveyed into a fixed place and adjusted in its attitude by the rotation of the rotating body 45 to the swing body 41 and the displacement of the swing body 41 by the hydraulic cylinders 43a-43f of the parallel manipulator 42.