| 摘要 |
PROBLEM TO BE SOLVED: To make workability good and reduce the number of parts by providing a through hole corresponding to the female screw hole of a drain body on the suppression piece of a waterproof layer formed on the bottom part of a protection cover, inserting a tightening bolt in the through hole to be screwed in the female screw hole of the drain body, and tightening the protection cover on the drain body. SOLUTION: A drain body 2 has a plurality of female screw holes 3 in a flange part 4, a plurality of suppression pieces 8 having a cross section shape corresponding to the flange part 4 of the drain body 2 are provided on the bottom part of a cylindrical protection cover 5, and through holes 9 corresponding to the female screw holes of the flange part 4. The suppression pieces 8 of the protection cover 5 is covered on the flange part 4 of the drain body 2, tightening bolts 10 are inserted from the through holes 9 to be screwed in the female screw hole 3 of the drain body 2, and the protection cover 5 is tightened on the drain body 2. Thereby tightening of the drain body 2 and the protection cover 5 is enabled without providing the waterproof suppression as a separate body and without needing a stop screw. Thus, the labor saving in constructing work and the reduction of the number of parts are contrived.
|
