CUTTING BLADE DEVICE OF COMBINE HARVESTER

PROBLEM TO BE SOLVED: To reduce vibrations on a cutting work and enhance the speed of the cutting work. SOLUTION: This cutting device 50 of a combine harvester C cuts grain straws raised using a raising device 9 liftably disposed on a frame 1 with the travel of the frame, and the cut grain straws are threshed in a threshing portion 22. The cutting device 50 has an endless chain 38 disposed in a state capable of being rotated at a high speed and cutting blades 51 attached to the chain 38. The cutting blades 51 are continuously driven together with the chain 38 at a high speed in one direction to cut grain straws. Since the cutting blades 51 are continuously rotated at a high speed in one direction without being reciprocated, vibrations are little. Since grain straw guides 41 disposed at a prescribed pitch in the lateral direction of the frame are projected from the frame in the frame-traveling direction, the lateral escapes of the grain straws on their cutting work can be prevented.