Elevator device for drilling systems

An elevator device applied to a drilling machine (4), said elevator device comprising a driving head (5) rotatably mounted by means of a pivot pin (70) on a driving carriage (60) which is slidable on said drilling machine (4) in a vertical drilling direction (12), and a lifting device (2) mounted on the driving head (5) and cooperating with a rod (100) or casing (101) loading device (3) of said drilling machine (4);

• said loading device (3) being adapted to take a rod (100) or a casing (101) from a horizontal position to successively engage said rod or casing in said lifting device (2) mounted on said driving head (5) of said drilling machine (4), said driving head (5) having a driving head (5) frame, and said lifting device comprising an outer fixed body (6) rigidly fixed with said driving head (5) frame to be driven by said driving head, said lifting device (2) further comprising a rotary inner body (9) that is rotatably mounted inside said outer fixed body (6) by means of mounting bearings (10), said rotary inner body (9) having expansible shoes (7) mounted thereon which are slidable on an inclined plane (8) extending at an inclined angle between said vertical drilling direction (12) and a plane extending perpendicularly to said vertical drilling direction (12), said lifting device (2) further comprising hydraulic cylinders (11) connected between said outer fixed body (6) and said expansible shoes (7) to slide said expansible shoes (7) on said inclined plane (8) thereby for locking said drilling rod (100) or casing (101).