| 摘要 |
<p>PURPOSE:To prevent waste water out of the outside from penetrating into the inside of a car body as well as to make the infiltrate water into the car body, if any, flowable outside, by extending a flush tongue piece from a plug body, while making up a bent outlet groove in the flush tongue piece. CONSTITUTION:A rectangular flush tongue piece 2 is extendedly installed in a diametral direction from a plug body 1 formed in circular form with a flexible material, while a circular engaging projection strip 3 to be fitted in a drain hole is projectingly installed in position away from a backside 1' of the plug body 1. And, at a backsode 2' of the flush tongue piece 2, each of symmetrical guide vertival strips 51 and 52 being lower than the said engaging projection strip 3 is projectingly installed therein. With this constitution, a drain concave surface 6 having a drain port 6; opened is made up, and this concave surface 6 is interconnected to an opening space 4 surrounded by the projection strip 3 via a notched port 4'. In addition, at this drain concave surface 6, each of backflow preventing projections 7 and 7' is installed alternately at both sides from the inner surface of these guide vertical strips 51 and 52 whereby a bent outlet groove 8 is formed in this way.</p> |
