| 摘要 |
PROBLEM TO BE SOLVED: To provide a new valve device capable of being miniaturized and reducing costs.SOLUTION: A valve device includes a branch case 2 constituting a part of a pipe conduit, a shielding bag member 3 expandable and contractable by being folded, and applied as a valve element for shielding a flow channel in the branch case 2 in an expanded state, an opening bag member 4 having an opening to open the flow channel in an expanded state, a moving body 5 holding both bag members 3, 4 at a position held by both bag members 3, 4, and supported by the branch case 2 movably according to expanding and contracting motions of the bag members 3, 4, and paired conduction pipes 60, 61 respectively conducting with the shielding bag member 3 and the opening bag member 4. A flow channel shielding state for shielding the flow channel by keeping the opening bag member 4 in a contracted state and keeping the shielding bag member 3 in an expanded state, and a flow channel opening state for opening the flow channel by keeping the opening bag member 4 in an expanded state and keeping the shielding bag member 3 in the contracted state, can be switched by making the fluid flow in and out to the bag members 3, 4 through the pair of conduction pipes 60, 61.SELECTED DRAWING: Figure 1 |
