1. A maize harvesting machine comprising a support structure (12) carrying a plurality of harvesting units (18) installed along each other in the transverse direction (B), each harvesting unit (18) comprising:! a frame structure (26) fixed in relation to the supporting structure (12) and including two box sections (28) mounted spaced apart from each other in the transverse direction by means of an empty space (30) elongated in the longitudinal direction (A)； ! two tear-off plates (44) located on respective box sections (28) and having corresponding edges (46) facing each other, which extend on opposite sides in an empty space (30), with tearing edges (46) facing each other the plates (44) form a compression channel (48)； and! a pair of pinch rollers (82) rotating in opposite directions, located under the compression channel (48),! characterized in that the tear-off plates (44) are movable in a vertical direction (V) relative to the corresponding box sections (28) between the upper position and the lower position, while the tear-off plates (44) are connected with corresponding spring devices that elastically push the tear-offs plate (44) in the direction of the upper position. ! 2. The machine according to claim 1, characterized in that each of the tearing plates (44) has a central portion that extends inside the cavity (38) of the corresponding box section (28), and an end portion adjacent to the edge (46) that extends to the outer side of the box section (28) through the inner through hole (40). ! 3. The machine according to claim 2, characterized in that1. Машина для уборки кукурузы, содержащая опорную конструкцию (12), несущую множество уборочных узлов (18), установленных вдоль друг друга в поперечном направлении (В), при этом каждый уборочный узел (18) содержит: ! рамную конструкцию (26), фиксированную по отношению к опорной конструкции (12) и включающую две коробчатые секции (28), установленные на расстоянии друг от друга в поперечном направлении посредством п
