PURPOSE: To bear a long screw in a conveyor safely by fixing cylindrical bearing parts outside the blade of the screw at fixed intervals and supporting these bearing parts by rollers.

CONSTITUTION: Cylinders 2a are fixed at regular intervals for a screw 1. Rollers 5 are provided around each cylinders 2a to be in contact with. They are respectively fixed on both sides, the bottom, and the lid of a wide and deep screw bearing casing 3a provided on a casing 13, and their heights can be adjusted by an adjustment plate 7. During operation, since the screw is continuous, materials can be conveyed without any choking, and generations of gases and noises can be prevented by the adjustment at the bearing parts.