Pipeline or cable inspection opening, for being mounted on a wall, including insertion part is passed through and is separated by wall, and ligulate stopper extends through channel around hatch frame

摘要

The insertion part (10) of the hatch (2) passed through the actual wall ends at an open channel (12) extending around the periphery of the hatch frame (4). Tongue-shaped retaining parts (14) extend inwards in the length direction of the insertion part from the end of the channel, and lines of weakness (16) are present in between adjacent retaining parts and between these and the channel.