| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sulky rice transplanter having a crossfeed screw shaft attaining the smooth movement of a slider. <P>SOLUTION: The sulky rice transplanter includes a right guide groove 61B and a left guide groove 61A spirally provided on the outer periphery 62 of the crossfeed screw shaft 60. The terminal of the right guide groove 61B communicates with the starting end of the left guide groove 61A through a first direction change groove 61C, and the terminal of the left guide groove 61A communicates with the starting end of the right guide groove 61B through a second direction change groove 61D to form an endless guide groove. When the crossfeed screw shaft 60 is rotated in a state of the slider being movably fitted into the endless guide groove, a seedling placing base can be continuously reciprocated within a predetermined range in a vehicle width direction. The tip portion of a first acute angle part AG1 formed between the starting end of the first direction change groove 61C and the starting end of the left guide groove 61A is formed chamfered with a curvature in a plan view, and the tip portion of a second acute angle part AG3 formed between the starting end of the second direction change groove 61D and the starting end of the right guide groove 61B is formed chamfered with a curvature in a plan view. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
