PROBLEM TO BE SOLVED: To rotationally turn a treatment part in synchronization with rotational turning of an operation wire.SOLUTION: A treatment instrument for endoscopes in which a coil sheath 31 and an operation wire 32 independently, rotationally turn about a shaft at a tip side, includes: the coil sheath 31, the tip end of which is ground such that the diameter of a tip end side is reduced a pair of half-split rings 43 that are welded such that a diameter of an opening part is reduced in a state where the tip end of the coil sheath to which a circular ring 42 is welded is inserted into the opening part and a ring 42 that is welded to the tip end of the coil sheath 31 and whose coming-off is prevented by the half-split rings 43.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】処置部を操作ワイヤの回動と同期して回動すること。【解決手段】コイルシース31及び操作ワイヤ32が先端側において独立して軸周りに回動する内視鏡用処置具において、先端側が縮径するように先端が研削されたコイルシース31と、円環状のリング42が先端に溶接されたコイルシースの先端部を開口部に挿入した状態の開口部径を縮径するように溶接された一対の半割リング43と、コイルシース31の先端に溶接されて半割リング43により抜けが防止されるリング42とを備えたもの。【選択図】図3
