PROBLEM TO BE SOLVED: To solve such a problem that: when the revolving speed of an electric motor driving the working apparatus of a working machine is to be automatically synchronized with the travel speed of the working machine subjecting work on a farm while being moved by the traveling vehicle, if its travel speed becomes lower, the synchronized revolving speed of the electric motor also becomes lower, resulting in delay of the electric motors start-up and in expanding of a work-free zone along with reducing work level by the electric motor, leading to shortage of a fertilizer, seeds, etc. to be fed to the farm following the work-free zone, thus getting difficult to mitigate shortage of a fertilizer, seeds, etc. in the work-free zone.SOLUTION: There is provided a feed control mechanism 1 that: in starting a work activity, during a speed-sensing time period necessary for sensing the travel speed V of a fertilizer application seeder 2 by a grounding-type travel speed sensor 42, a preliminary revolution is conducted by revolving an feeding motor 52 with a defined preliminary revolving speed Rm greater than a revolving speed under automatically synchronizing control.COPYRIGHT: (C)2013,JPO&INPIT【課題】走行車両によって移動されながら圃場に作業を施す作業機の移動速度に、作業装置を駆動する電動モータの回転速度を自動同調させる場合、作業機の移動速度が低速になると電動モータの同調回転速度も低速となり、作業開始時には、電動モータの立ち上がりが遅くなって、無作業区間が拡大すると共に、電動モータによる作業量が少なくなって、無作業区間の後に供給される肥料や種子等が不足し、無作業区間における肥料や種子等の不足を緩和しにくくなる、という問題があった。【解決手段】作業開始時に、接地式移動速度検知装置42により、施肥播種機2の移動速度Vを検知するのに必要な速度検知時間の間、自動同調制御中の回転速度よりも大きな一定の予備回転速度Rmにより、繰出モータ52を回転させて予備回転を行う、供給制御機構1を設けた。【選択図】 図6
