Gap cover for mine walking support - has lever system linking thrust piston gear to warping element

摘要

A warping element is extensible and retractable sideways, by one or more thrust piston gear units, on a walking support in a mine. This can be a shield or block support, with gap covering provided. The thrust piston gear unit (19) is connected to the warping element (18) via a system of levers (20). The gear unit's axis is pref. aligned in the movement direction (R). The lever system can comprise one or more elbow lever gear units, the thrust piston gear being pref. located between the hinge joints of two such units.