| 摘要 |
PROBLEM TO BE SOLVED: To prevent the leakage from an inspection port by arranging a draining groove around the inspection port provided on the washing place of a waterproof pan, sealing and placing an inner lid on a flange to close the inspection port, and covering the upper surface of the inner lid and the draining groove with a dressed lid. SOLUTION: An inspection port 4 is provided in a washing place 3, and a draining groove 5 is arranged around the inspection port 4 in recessed form. A flange is protruded inward from the inside surface of the inspection port 4, and an inner lid 9 is sealed and placed on the flange to close the inspection port 4. A dressed lid 3' for covering the upper surface of the inner lid 9 and the draining groove 5 is laid to isolate the sealed part of the inner lid 9 from water. Thus, since a load is hardly added to the sealed part from above, sealing property can be ensured to surely prevent the leakage from the inspection port 4. Further, the upper surface of the inner lid 9 and the draining groove 5 are covered with the dressed lid 10, whereby the washing place 3 with a good appearance can be formed. |
