| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for preventing dew drops which has enough strength to prevent the falling of a case main body even when a blow molding method is used for manufacture, and has a small number of assembling parts. SOLUTION: Reinforcing ribs 15 are molded integrally in the inside wall close to the opening part of the case main body 10. Zigzag passage partition walls 11, 12, and 13 formed in the case main body 10 are formed by making the tip parts of partition wall constituent pieces 111, 121, and 131 of a pair which are molded integrally on both opposite side walls 10a of the case main body 10 butt each other. The partition wall 11, below which dew drops passes, is formed so that each of its partition wall constituent pieces 111 of a pair is lowered from the protruding base end part 111b toward the protruding tip part 111a. Therefore, a ventilation space is formed above the partition wall 11, and the protruding base end part 111b is formed integrally in sequence to the reinforcing ribs 15.
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