| 摘要 |
PROBLEM TO BE SOLVED: To provide a round window enabling rainwater blowing onto its surface on the outdoor side to surely flow down to the lower part. SOLUTION: The round window 3 is formed by installing a panel 2 in an annular frame 1. An annular projecting piece 4 is formed at the outer peripheral edge of the outdoor side surface 1a of the frame 1. An inward piece 5 is formed on the lower half of the annular projecting piece 4 to form a drainage groove 6. The rainwater blown onto the outdoor side surface 1a of the frame 1 and the outdoor side surface 2a (outdoor side surface 3a of the round window 3) of the panel 2 flows down to the lower part of the round window 3 along the annular projecting piece 4 and the drainage groove 6, and does not flow from the outer peripheral edge of the round window 3 to the outside. Consequently, the rainwater blown onto the outdoor side surface surely flows down to the lower part of the round window 3. COPYRIGHT: (C)2007,JPO&INPIT
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