PROBLEM TO BE SOLVED: To provide an inexpensive winding roll support shaft being a synthetic resin molded article.SOLUTION: A winding roll support shaft is used in a medicine packaging apparatus. On an external surface of a support shaft body, an undulating piece 22 in an axial direction thereof is provided to be fixed on a support shaft base side, protrusions 23 on an external surface of the undulating piece 22 are locked to a side surface of a protruding strip 13 on an internal surface of a winding roll to prevent the winding roll 10 from idly turning to the support shaft 20. At the same time, another protrusion on the external surface of the undulating piece 22 is locked to a front end surface of the protruding strip 13 to prevent the winding roll 10 from being slipped off from the support shaft 20. During rotation when unwinding the winding roll 10, prevention of slipping off is kept by resilient force to the outside of the undulating piece 22. By pulling-out force in the axial direction to the winding roll 10, the undulating piece 22 loosens inward, and locking between the other protrusion 24 and the end surface of the protruding strip 13 is released, and the winding roll 10 can smoothly be replaced. In this case, a slope 24a of the protrusion works as a guide.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2017,JPO&INPIT【課題】合成樹脂成型品であって、安価な巻回ロール支持軸とする。【解決手段】薬剤包装装置における巻回ロール支持軸である。その支持軸本体外面に、その軸方向の起伏片22を支持軸基部側で固定して設け、その起伏片22外面の突起23を巻回ロール内面の突条13側面に係止して支持軸20に対する巻回ロール10の空回りを防止するとともに、起伏片22外面の他の突起を前記突条13の先端端面に係止して巻回ロール10の支持軸20からの抜け止めを行う。巻回ロール10繰り出し時における回転中は、起伏片22の外側への弾性力でもって抜け止めが維持され、巻回ロール10への軸方向の引き抜き力によって、起伏片22が内側に撓んで他の突起と突条13端面の係止が解除されて、巻回ロール10を円滑に交換し得る。このとき、突起の傾斜面24aがガイドとなる。【選択図】図6
