Inspection flap for exposing and covering an opening in a spiral tube section of a spiral chute in underground mining

摘要

The invention relates to an inspection flap (3) for spiral chutes in underground mining, especially for underground coal mining, the inspection flap (3) being arranged on the inner wall (14) of the relevant spiral tube section (1) in such a way as to be movable in pendulum fashion at right angles to the circumferential surface of the spiral tube section and being supported with a bottom angled marginal area (26) against a portion shaped like a tamping pocket at a distance (H) on the inner wall (27) of this portion (28) shaped like a tamping pocket (Fig. 1). IMAGE