Self-propelling harvester thresher

A self-propelling harvester thresher, particularly a caterpillar-driven small harvester thresher for rice or the like, comprising a threshing and separating mechanism operating in accordance with an axial flow system and extending transversely to a travelling direction;

• a sieve device for separating a grain-chaff mixture and having a transporting bottom;
• and a transporting device arranged to transport the grain-chaff mixture from said threshing and separating mechanism to said sieve device, said transporting device including a trough and at least one collecting and transferring screw which is supported in said trough and extends transversely to the travelling direction, said collecting and transferring screw having two oppositely running screw plates provided on its ends and a throwing scoop provided in its center, said collecting and transferring screw and said trough being arranged before said transporting bottom as considered in a product throughgoing direction and substantially in a same horizontal plane with said transporting bottom.