Machine for extracting, rough shaping and squaring blocks of stones, marbles and granites, particularly in quarries

A rock cutting machine, comprising:

• an automotive vehicle;
• a pivotable boom mounted for pivotal movement on said vehicle;
• a beam pivotally mounted on said boom and carrying a swingle bar at the end of said beam remote from said boom;
• said swingle bar being pivotally mounted on said beam at about the center of said swingle bar, said swingle bar being in the form of a yoke having arms, each arm carrying coupling means;
• a rotatable plate coupled to said swingle bar through said coupling means;
• a first frame affixed to said rotatable plate;
• a second frame spaced from said first frame, and fixed to said first frame by cross beams, said second frame having longitudinal side members of square cross section oriented as guide members, with the closest portions of said side members to each other being edges;
• a sawing unit comprising a cutting chain, a motor connected to and adapted to drive said cutting chain, a base supporting both said cutting chain and said motor, and guide wheels journaled in said base for engagement with said guide members, the wheels, base, and associated cutting chain being moveable along said guide members;
• means mountable on said vehicle for maintaining the vehicle in a fixed position on the ground;
• adjusting means for adjusting the respective position of said boom, beam, swingle bar, rotary plate and sawing unit;
• and
• means for maintaining the second frame in a fixed position during a cutting operation, said frame maintaining means being:
• bearing means provided on one end of said guide member and adapted to engage horizontal ground;
• and
• bearing means provided on the side of the second frame remote from the rotatable plate, and adapted for engaging a vertical wall of rock, whereby the frame is maintainable in a fixed position under pressure between the fixable automobile vehicle, the ground, and vertical wall.