Device to clamp logs during the cut thereof and sawing machine comprising said device

A device to clamp a log (L) to be cut, comprising a log advancing path and, on each side of an intermediate plane (C-C) parallel to the advancing path, a set of jaws, each set comprising a first jaw (25) and a second jaw (27), the first jaw (25) being hinged to a fixed structure (29) around a first pivoting axis (A25) and the second jaw (27) being hinged to the fixed structure (29) around a second pivoting axis (A27);

• wherein each first jaw (25) and second jaw (27) are joined together by means of a connecting rod (41) and form, with said connecting rod (41) and the fixed structure (29), a four-bar linkage, the first jaw (25) and the second jaw (27) forming a respective first rocker and a respective second rocker of the four-bar linkage;
• wherein the first rocker is hinged to a first end of a respective rod-strut (33, 35);
• and wherein the rod-strut (33;
• 35) is movable in order to make the respective four-bar linkage oscillate and to cause the adjustment of the jaws position according to the diameter of the log to be cut.