PROBLEM TO BE SOLVED: To provide a bend shape holding operation device for body-cavity insertion tubes, allowing, by one rotation operation member, easy performance of both an operation to hold a bent shape by simultaneously pulling a pair of operation wires of a bendable part, and an operation to pull one of the pair of operation wires, to send out the other, and to bend the bendable part by remote control.SOLUTION: An intermediate base 17 rotatably installed with an intermediate small gear 23 meshing with both gears 21, 22 respectively integrally provided in a pair of wire winding drums 11, 12 is disposed between the pair of wire winding drums 11, 12 rotatably in a direction around the axis, while a drum rotation operation axis 18 is connected to the first wire winding drum 11, and an intermediate base rotation operation axis 19 is connected to the intermediate base 17.COPYRIGHT: (C)2012,JPO&INPIT【課題】屈曲自在部の対をなす操作ワイヤを同時に牽引して屈曲形状を保持する操作と、対をなす操作ワイヤの一方を牽引して他方を送り出して遠隔操作により屈曲自在部を屈曲させる操作とを、一つの回転操作部材で容易に行うことができる体腔内挿入管類の屈曲形状保持操作装置を提供すること。【解決手段】一対のワイヤ巻取ドラム11,12に各々一体的に設けられた歯車21,22の双方と噛み合う中間小歯車23が回転自在に取り付けられた中間基盤17が、一対のワイヤ巻取ドラム11,12の間に軸線周り方向に回転自在に配置されて、第1のワイヤ巻取ドラム11にドラム回転操作軸18が連結されると共に、中間基盤17に中間基盤回転操作軸19が連結されている。【選択図】 図1
