| 摘要 |
PROBLEM TO BE SOLVED: To improve rigidity of a hole end, which tends to deform because its rigidity is lowered by arrangement of a duct branch pipe arranged adjacently to the hole end of a duct main body by fitting a hole end of a duct extension body into the hole end of the duct main body and to easily regulate an amount of air blowing from the branch pipe in the duct main body only by length regulation of the hole by using a contact side wall touching the duct branch pipe of the duct main body in the duct extension body as an air distributing board for the air flowing through the duct. SOLUTION: This air conditioning duct is divided into the duct main body and the duct extension body 1 respectively having the hole ends fitted to each other, and the hole end of the duct extension body 1 is fitted into the hole end of the duct main body 2. The duct branch pipe 7 is arranged adjacently to the hole end of the duct main body 2, and the wall on the duct branch pipe 7 contact side gradually reduces a cross sectional area of an inside opening 6 of the duct extension body 1 from the base part to the front end for closing a part of the branch pipe 7.
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