Coupling joint structure null to water catchment

摘要

PURPOSE:To easily execute construction by inserting a joint coupling between a drain cylinder and a connecting ring installed onto the outer periphery of the drain cylinder and deforming an elastic piece by the cam part of the drain cylinder by turning the connecting ring and engaging the engagement part of the elastic piece and the engaged part of the joint coupling. CONSTITUTION:An elastic piece 5 is deformed outward by oppositely setting the longer diameter side of a cam part 9 installed on a drain cylinder 2 and the elastic piece 5 of a connecting ring 4 by turning the connecting ring 4. Then, a joint coupling 6 is inserted between the connecting ring 4 and the drain cylinder 2, and the engagement part 7 of the elastic piece 5 and the engaged part 8 of the joint coupling 6 are set oppositely. Then, the elastic piece 5 is vertically returned by oppositely setting the shorter diameter side of the cam part 9 and the elastic piece 5 by turning the connecting ring 4, and the outward deformation is pressed by the regulation part 15 of the cam part 9, and the engagement part 7 and the engaged part 8 are engaged.