| 摘要 |
PROBLEM TO BE SOLVED: To reduce the chances of a flow channel being switched inadvertently.SOLUTION: A flow rate switching device (11) comprises: a holding body (21) which holds a first flow channel (7) and a second flow channel (8) with the first and second flow channels (7, 8) passing therethrough and has an opening (36) for operation; a supported part (42) having a rotation center along a direction of the flow channels (7, 8) passing through the holding body; blockage parts (43, 44) capable of blocking the flow channels (7, 8) as the supported part (42) rotates; an engaging part (47) which is disposed within the opening (36) provided in the supported part (42) and engages a jig (49) inserted from the outside through the opening (36); and an operation part (46) for moving the supported part (42) among a position at which the first flow channel (7) is blocked, a position at which the second flow channel (8) is blocked, and a position at which the flow channels (7, 8) are opened. |
