A system for mechanical attachment of a recovery key and / or of a refractive index key to a drill string and raise - - boring machine

摘要

A system (60), with a machine frame (20, 24), and with a recovery key (17) and / or with a refractive index key (25) for placing or removal of the interception key (17) and / or of the refractive index key (25) to one or of a drill rod segment (5, 6, 7) of a drill string (4), in particular a raise - - boring machine (100), wherein the interception key (17) and / or the refractive index key (25) rotatably and / or removably on the gripping arm (20, 24) is arranged.