Cutter for porous concrete block, with fixed cutting bed of grid bars

摘要

A cutting frame moves longitudinally along the cutting bed and has cutting wires pretensioned on vertical planes. The cutting wires are guided along lengthwise slots in the cutting bed. The grid (29) bars (28) are loosely mounted on several grid lifting bridges extending across the rail tracks. The lifting bridges consists of the lifting bridge piers (18) and beams (17). The lifting bridge piers have an articulated link (21). Each lifting bridge pier consists of a top lever arm (19) linked to the bridge beam, and a bottom lever arm linked to the cutting bed support bridge beam (14).