The medicine bag supply mechanism of this invention is provided with a shaft frame and a drag wheel group； the drag wheel group is equipped with a servo motor on a base, a main runner driven to rotate by the servo motor, and a driven wheel； At the side position of the driven wheel, the shaft is provided with a cam wrench for pushing the driven wheel to move back and forth relative to the main runner； the driven wheel can be kept away from the main runner by simply pulling the cam wrench. The normal state is kept in the state of pressing against the main runner, which makes the operation of installing the medicine bag roll between the main runner and the driven wheel more convenient and labor-saving, and helps the operator to install the medicine bag roll in place.本創作之藥袋供應機構，係設有一軸架以及一拖曳輪組；其拖曳輪組係於一基座上設有一伺服馬達、一受伺服馬達驅動旋轉的主轉輪，以及一從動輪；於從動輪之邊側位置處，軸設有一供用以推動從動輪相對與主轉輪往復位移的凸輪扳手；可透過簡單扳動凸輪扳手的方式，讓從動輪常態保持在遠離主轉輪狀態或常態保持在朝主轉輪壓靠狀態，使藥袋捲安裝在主轉輪與從動輪之間的作業更為方便、省力，且有助操作人員將藥袋捲確實安裝至定位。
