REAPING PART LIFTING AND LOWERING STRUCTURE FOR COMBINE HARVESTER

PROBLEM TO BE SOLVED: To provide a reaping part lifting and lowering structure for a combine harvester with which a harvesting operation is carried out at a relatively stable reaping height in spite of a structure not equipped with an automatic reaping height controller. SOLUTION: This reaping part lifting and lowering structure for the combine harvester has constitution that an operation lever 30 for switching the control valve of a hydraulic cylinder for lifting and lowering a reaping part is manually switched from a rise position to drive and raise the reaping part and a neutral position to prevent the rise and fall of the reaping part to a fall position to allow the free fall of the reaping part and is returned to a neutral. The structure is equipped with a lever return prevention means for restraining and preventing the operation lever 30 from returning from the fall position and moving to the neutral position. COPYRIGHT: (C)2005,JPO&NCIPI