Work platform with telescopic frame - has box-like parts sliding inside each other with section reduced before sliding starts

摘要

The telescopic frame for a work platform has several parts and a fixed part around them. The mobile sections are four mounts joined along the edges of the quadrilateral they define. The stays of one face are made of rungs. The mobile trunks slide in each other consecutively and are helped by guides. One face of a trunk is allowed back to assist sliding. The lower trunk is fitted to a mobile platform. Various adjustments are possible.