| 摘要 |
PROBLEM TO BE SOLVED: To prevent cereal grains from being caught between screw blades by automatic contraction of a cereal grain-unloading pipe 2 when automatically housing a cereal grain-unloading pipe 2, and prevent the crushing of rice grain or damage of the screw blades. SOLUTION: This cereal grain-unloading device is provided with a cereal grain-detecting sensor (8) in a cereal grain-conveying passage from the inside of a grain tank (1) to a cereal grain-unloading port (7) at the end part of the cereal grain-unloading pipe (2), when the automatic revolution is started after passing a set time (T) from after the cereal grain-detecting sensor (7) does not detect the cereal grains during conveyance, a contraction-actuating output is output to an elongation and contraction-driving device (3) to automatically contract the cereal grain-unloading device (2), and when the automatic revolution is started before passing the set time (T) from after the cereal grain-detecting sensor (7) does not detect the cereal grains during the conveyance, the actuating output from a controller (6) to the elongation and contraction-driving device (3) is restrained so as not to output the contraction-actuating output to the elongation and contraction-driving device (3). COPYRIGHT: (C)2008,JPO&INPIT
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