From the cutter bit exchange mannered null cutter head central body which uses the shielded tunnelling machine and the gate feature for the said cutter bit chambering which have the gate feature for cutter bit chambering of shielded tunnelling machine and

摘要

PROBLEM TO BE SOLVED: To obtain a cutter-bit loading gate mechanism of a shield machine, which can reduce costs because it is structurally simple, and which has no problem associated with a space.;SOLUTION: This cutter-bit loading gate mechanism comprises a gate member 46c which is arranged in such a manner that a cylindrical part 5 of a cutter head 3 and the side of a cutter spoke 7 can/cannot communicate with each other, and a jack 47 for driving the gate member 46c so as to open/close it. The gate member 46c is provided in the cylindrical part 5 of the cutter head in such a manner as to be capable of advancing/retreating in the axial direction of the shield machine while corresponding to each cutter spoke 7 into which the cutter bit 11 is to be loaded. The gate member 46c and the jack 47 are detachably constituted.;COPYRIGHT: (C)2007,JPO&INPIT