Shield machine, the method of operating the rotary joint and shield machine

摘要

PROBLEM TO BE SOLVED: To provide a shield machine, a rotary joint used for the same, and a method of operating the shield machine for rapidly and easily performing cutter bit replacing work by providing a cutter bit replacing means capable of mounting a new cutter bit to a cutter spoke from a body part.;SOLUTION: The shield machine 100 has the body part 10; a rotary excavating part 20; the rotary joint (RJ) 40 for supplying oil pressure to the rotary excavating part 20 from the body part 10; a stator support means 50 for supporting a stator 41 of the RJ 40; a stator fixing means 60 for fixing the position of the stator support means 50; and a rotor rotating means 70 for transmitting rotation of the rotary excavating part 20 to a rotor 42 of the RJ 40. A stator support lever 52 of the stator support means 50 is swingable around a support lever fulcrum 51 used as the swing center. With this swing, a center shaft of the RJ 40 coincides with the rotational center of the rotary excavating part 20 or is displaced from the rotation center.;COPYRIGHT: (C)2006,JPO&NCIPI