DRAIN TRAP STRUCTURE OF WATERPROOF PAN AND WATERPROOF PAN

摘要

PROBLEM TO BE SOLVED: To provide drain trap structure of a water proof pan which dispenses with the attaching work of a drain trap in a work field and is simple in connecting work between the drain trap and a drain pipe. SOLUTION: In a waterproof pan, a waterproof pan body and a drain trap are formed in one body. A drainage receiving part 13 having a recessed sectional view and a drainage flowout part 15 communicating with the part 13 are formed in one body with the water proof pan body in the lower part of a drainage port 11a of a waterproof body 11 and near by it. As a cylindrical water holding cylinder 12 vertically having an opened part in a lower part of the drainage port 11a of the waterproof pan body is suspended so as not to bring the lower opened part 12b of the cylindrical water holding cylinder into contact with the bottom of the drainage receiving part 13, the peripheral edge of its upper opened part is meltedly attached or joined to the drainage peripheral edge for fixing them, and a drain pipe is thereby connected to a piping connecting part 16 at the end of a drainage discharge part 15.