| 摘要 |
<p>A roll forming machine picks up crop material and forms, twine wraps and discharges rolls or large round bales thereof as the machine is continuously moving across the field. The machine has a mobile frame supporting a pickup and a floor, the latter supporting a lower conveyor. A front upper apron is supported on the frame above a front portion of the lower conveyor and floor and defines a front roll forming region therewith. A rear upper apron is supported on the frame above a rear portion of the lower conveyor and floor and defines a rear roll forming region therewith. Formation of a crop material roll is initiated in the front region and completed in the rear region after the roll has been partially formed in the front region and transferred to the rear region. Mechanism on the frame is operable to adjust an inlet opening to the rear roll forming region between a first size to allow the delivery of crop material therethrough for forming a roll in the rear region and a second size larger than the first size and adapted to allow the transfer therethrough of the partially formed roll to the rear region. Further, controls as provided on the frame for controlling the operation of the inlet opening adjusting mechanism. The controls include a pivotally mounted paddle which is positioned for engagement by the transferred roll as the roll arrives in the rear region. Such engagement actuates the paddle to cause the controls to cause operation of the adjusting mechanism to adjust the inlet opening of the rear region from its second to its first size.</p> |
