The device (100) has a segment (22) articulated on another segment (21) around a shoulder joint axis (221) parallel with a longitudinal axis of a platform (10) to form a shoulder angle modifiable between the segments. The angle opens in direction of a side of the platform, where a cutting unit (30) is in working condition. The cutting unit is articulated at a free end of an articulated arm (20) around a wrist joint axis (311) parallel with the longitudinal axis to form a wrist angle modifiable between an end segment of the arm and the cutting unit.
