To provide a bending device for a medium filling bag capable of uniformly bending a bag opening part of the medium filling bag in a state of quickly folding it in a standing posture with a simple constitution to quickly transfer the bag to a subsequent step in a non-bulky state.SOLUTION: In a bending device for a medium filling bag, a bag folding part 5 folds a bag opening part P2 by inserting a pair of movable members 5d into the bag opening part P2 to open and close them； a bag pressing part 7 presses a pair of pressing plates 7a from an outside of the bag opening part P2 to cause the bag opening part P2 to be folded in a standing posture and sandwiched between them； in this state, a bag pushing-out part 8 pushes out a medium filling bag P from a bending position Q to thereby deliver the bag to a subsequent step in a state of bending the bag opening part P2 to one direction under a non-bulky condition.SELECTED DRAWING: Figure 1【課題】培地充填袋の袋開口部を起立姿勢のまま簡易な構成で迅速に折り畳んだ状態で一様に折り曲げて嵩張らない状態で後工程に迅速に受け渡すことが可能な培地充填袋の折曲げ装置を提供する。【解決手段】袋折り畳み部５は一対の可動部材５ｄを袋開口部Ｐ２へ挿入して開閉させることで袋開口部Ｐ２を折り畳み、袋押圧部７は一対の押圧板７ａを袋開口部Ｐ２の外側より押圧して袋開口部Ｐ２が起立姿勢で折り畳まれて挟み込まれる。この状態で袋押出し部８は培地充填袋Ｐを折り曲げ位置Ｑより押し出すことにより袋開口部Ｐ２を一方向に折り曲げた状態で嵩張らない状態で後工程に搬出する。【選択図】図１
