DEVICE FOR OPENING AND CLOSING SLITS OF SHIELD MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a device for opening and closing slits of a shield machine which can be installed in a narrow space for installation and can correspond to the slits even when they are in large numbers. SOLUTION: The device 33 for opening and closing the slits of the shield machine 1 opens and closes the slits 22 in a plurality provided in a face plate type cutter 3 for taking in excavated earth. Herein a slit covering plate 28 having a plurality of openings 26 corresponding to the slits 22 and also having a plurality of parts 27 covering the slits 22 which are provided in the lateral part in the circumferential direction of the openings 26 is provided in the rear of a face plate 21 so that it can rotate along the face plate 21, and an actuator 29 rotating the slit covering plate 28 is provided in a cutter chamber 8.