| 摘要 |
PROBLEM TO BE SOLVED: To prevent the malfunction of a grain sensor for detecting the full tank of grain in a grain tank when grain is thrown into the grain tank by a grain elevating cylinder and stored. SOLUTION: An air vent 4 is opened at the upper part of a side wall 3 of a grain tank 1, an exhaust duct 5 is connected and linked to the air vent 4 so that the grain tank 1 communicates with the outside. In this case, preferably, a grain sensor S is installed in close proximity to the air vent 4. Preferably, the exhaust duct 5 is laid upward and the air vent 4 is opened under the grain sensor S.
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