AUTOMATIC DRAIN DEVICE FOR CONTAINING SPACE OF FREIGHT TRANSPORTATION CONTAINER OR OTHER FREIGHT

摘要

PROBLEM TO BE SOLVED: To provide an automatic drain device which is improved so that compressed water is prevented from flowing into a container from the outside. SOLUTION: This automatic drain device is provided with a nearly cylindrical external casing with an opening and segment, a passage hole between both end segments, a web put on the upper side of a floatable first closing structure for the passage hole and a floatable second closing structure 19 for the passage hole 13 at the lower side of the web 12.