Flow site member, flow site cover, and method of opening and closing flow site member

摘要

PROBLEM TO BE SOLVED: To easily open and close a cover part covering a window part of a flow sight.SOLUTION: A flow sight cover 10 includes a body part 18 detachably attached to a flow sight 12. In the flow sight cover 10, the body part 18 includes: a plate-like cover part 20 which covers a window part 14 of the flow sight 12 and may be opened or closed; an angular wheel 22A having a rotary shaft 34A connected with the cover part 20; an angular wheel 22B having a rotary shaft 34B and configured to engage with the angular wheel 22A; and an operation part 26 configured to rotate the rotary shaft 34B.SELECTED DRAWING: Figure 1