| 摘要 |
<P>PROBLEM TO BE SOLVED: To stabilize the energization of a spring at an initial opening in a dust feed guide which rotates to retreat against the energization force of a torsion coil spring with a load received from a treated object inside a threshing chamber. <P>SOLUTION: One end of the spring 32 is locked to arm plates 29 and 30 integrated with the dust feed guide 21 (33), and the other end of the spring is locked to a restriction plate 31 (35). The arm plate 29 is rotated via one end of a slot 40 and the restriction plate 31 is rotated according to the movement of a lower limit stopper 39 by the operation of a control lever 47, etc. As a result, the energization force of the spring 32 is retained at a fixed level regardless of the initial opening of the dust feed guide 21. <P>COPYRIGHT: (C)2012,JPO&INPIT |
