| 摘要 |
PROBLEM TO BE SOLVED: To switch a circulation-discharge switching valve to the discharge side from the circulation side in the early timing when starting hulling separation work, while simplifying a constitution in a rocking separation plate type hulling separator.SOLUTION: A hulling separator comprises a hulling part (1), a hulling-down rice air separation part (2), a rocking separation plate type mixed rice separation part (3), and a driving main motor (M1), and comprises a function of automatically switching a circulation-discharge switching valve (36) to the discharge side from the circulation side in a predetermined timing after starting circulation hulling separation work; a function of switching the circulation-discharge switching valve (36) to the circulation side in an operation state of an operation lever (32) to a first operation position (43b), and switching the circulation-discharge switching valve (36) to the discharge side in an operation state of the operation lever (32) to a second operation position (43c); and a function of switching the circulation-discharge switching valve (36) to the discharge side from the circulation side by determining that the hulling separation work is stable when a detection load current value of a load current sensor (SE5) exceeds a predetermined upper integrated value within a predetermined time while exceeding a predetermined threshold value (VK). |
