| 摘要 |
<p>This device is of the type comprising at least one pair of tools arranged opposite one another and on either side of the vertical mid-plane (P) of a straddling frame and connected to driving means capable of imparting alternating transverse movements to them and each composed, on the one hand, of an elongate bar (6) which, made of deformable material, is anchored rigidly at its front end on a front vertical support (10) offset laterally relative to the abovementioned vertical mid-plane, has a rectilinear part (6b) in the harvesting zone and comprises, between its rectilinear part (6b) and its anchoring (8-10), a curved zone, the convexity of which faces the abovementioned mid-plane (P), and, on the other hand, of an arm (7) anchored on a rear vertical support (17) and connected rigidly to the rectilinear part (6b). According to the invention, the curved part (6c) of the bar (6) of each tool is bent along an arc of large radius extending as far as its anchoring (8), whilst, on the one hand, only the rear vertical support (17) carrying the driving arm (7) is connected to the driving means capable of causing it to pivot through a fraction of a revolution alternately in one direction and the other and, on the other hand, the front vertical support (10) is keyed in the frame. <IMAGE></p> |
