PROBLEM TO BE SOLVED: To solve such a problem that a plurality of discharge rolls and the corresponding feed hoppers situated thereabove and intended to feed powdery granules are laid out to put different kinds of powdery granules in the respective hoppers and spread the powdery granules while unloading them in such a spreading mode, when a powdery granule spreader is used by turning one of spreading switches ON to immediately conduct spreading action, such cases may occur that different kinds of powdery granules other than an intended kind of powdery granules are unloaded simultaneously and/or there is(are) trouble(s) after spread.SOLUTION: The spreader has: a plurality of discharge rolls arranged along the same rotating axis, the corresponding feed hoppers facing above the respective discharge rolls, and a residuals sensor functioning to detect the presence/absence of powdery granules in the respective feed hoppers, or the like. The spreader is configured as follows: different kinds of powdery granules are unloaded and spread by rotating the separate discharge rolls and when the residuals of the respective powdery granules in the corresponding feed hoppers are simultaneously detected, the corresponding discharge rolls are restrained so as not to rotate even if a spread switch is operated to turn ON.COPYRIGHT: (C)2011,JPO&INPIT【課題】複数の繰出ロール、及びこの上部の粉粒剤を供給する供給ホッパを配置して、各ホッパに異なる種類の粉粒剤を収容して繰出しながら散布する散布形態にあっては、散布スイッチ一つをON操作することによって、直ちに散布作用が行われる構成にすると、目的散布剤以外の相異なる種類の粉粒剤が同時に繰出されたり、散布されて不具合となることがある。【解決手段】同一回転軸芯上に沿って配置する複数の繰出ロール、この各繰出ロール上にのぞむ供給ホッパ、及び、この各供給ホッパ内の粉粒剤の有無を検出する残量センサ等を有して、異なる種類の粉粒剤を各別の繰出ロールの回転により繰出して散布するように構成し、前記各供給ホッパ内の各粉粒剤の残量を同時検出するときは、散布スイッチをON操作しても、この繰出ロールを回転しないように牽制する。【選択図】図9
