| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that there exists a possibility of breaking an auxiliary step 83 in collision with an obstacle and generating cutting of an uncut threshed straw by being caught on the auxiliary step 83 by hardly generating such an erroneous operation that mistakes the first operational tool 89 which can perform a switching operation of the auxiliary step 83 to a storing condition for the second operational tool 87 which can perform a switching operation of the auxiliary step 83 to an overhanging condition. SOLUTION: The auxiliary step 83 is provided so as to be freely switched to the storing condition and the overhanging condition. The first operational tool 89 which can perform the switching operation of the auxiliary step 83 to the storing condition by an operation in the vertical direction, and the second operational tool 87 which can perform the switching operation of the auxiliary step 83 to the overhanging condition by a turning operation, are arranged side by side at a position at an upper side than the step 69 and being lower than a seat 32 by making the heights of both operational tools 89 and 87 different. COPYRIGHT: (C)2004,JPO
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