CUTTER REPLACEMENT METHOD FOR TUNNEL EXCAVATOR, AND TUNNEL EXCAVATOR

摘要

PROBLEM TO BE SOLVED: To promote workability by making it possible to excellently moving a cutter when the replacement work for the cutter is carried out, in a cutter replacement method for a tunnel excavator and the tunnel excavator. SOLUTION: A row of cutters in which cutter bits 24a are connected by a movable block 28 is borne in a movable manner along a guide rail 27 of a cutter head 13, and in a tunnel excavator capable of being replaced by leading it into a cutter storage box 34, a dummy bit 31a closing an opening is put on the movable block 28 and, at the same time, a grease injection hole for pouring grease into a guide face between a rail groove of the guide rail 27 and a guide section of the movable block 28 and a filler injection hole for filling with the filler are provided in a space of the guide rail 27 formed by moving the cutter bits 24a to the side of the cutter storage box 34.