VALVE OPENING/CLOSING DEVICE

PROBLEM TO BE SOLVED: To lighten a workload to be applied to the opening/closing operation of a valve device, thereby to improve a working efficiency.SOLUTION: A valve opening/closing device 100 comprises: a gear having a first through hole penetrating in an axial direction; a housing holding the gear rotatably on an axis and made rotatable on said axis relative to the gear; a ratchet mechanism mounted in the housing for transmitting to the gear the rotations in a predetermined direction of the housing by meshing with the gear, in the case where the housing rotates in a predetermined direction, and for restricting the rotation of the gear in the case where the housing rotates on the axis in the direction opposite to the predetermined direction; an operation rod connected to the housing; a bearing member having a second through hole extending through along the axial direction of a valve rod owned by a valve device to be mounted; a vice member disposed in the bearing member; and a connection mechanism connecting a bearing member 220 and the gear.SELECTED DRAWING: Figure 7 【課題】バルブ装置の開閉操作にかかる作業負担の軽減を図り、作業効率の向上を図ること。【解決手段】軸心方向に貫通する第１の貫通孔を備えたギアと、ギアを軸心周りに回転可能に保持し、当該軸心周りにギアに対して相対的に回転可能な筐体と、筐体に設けられ、筐体が軸心周りに所定方向に回転する場合にギアに噛み合うことにより筐体の所定方向への回転をギアに伝達し、筐体が軸心周りに所定方向とは反対方向に回転した場合にギアの回転を規制するラチェット機構と、筐体に連結される操作棒と、取付対象とするバルブ装置が備える弁棒の軸心方向に沿って貫通する第２の貫通孔を備えた支持部材と、支持部材に設けられたバイス部材と、支持部材２２０とギアとを連結する連結機構と、を備えたバルブ開閉装置１００を構成した。【選択図】図７