To provide an air duct with various capabilities, enabling simplification of a manufacturing step by structuring the air duct by using a pile woven fabric.
The cylindrical bellows pipe air duct 60 is formed by spirally winding a duct member made of a woven fabric. The duct member made of the woven fabric is a pile woven fabric tape made of a single material, which includes raised fabric formed on a surface of a backing structure and has functions of insulation, sound absorption, and dew condensation prevention. The air duct is formed into a cylindrical shape by spirally winding the pile woven fabric tape. An edge of a rear stage pile woven fabric tape 62 is superposed on the upper side of an edge of a front stage pile woven fabric tape 61, and a core wire 63 is positioned on the lower side of the front stage pile woven fabric tape where the edges of the front stage pile woven fabric tape and the rear stage pile woven fabric tape are superposed. At a position on the upper side of the pile woven fabric tape corresponding to the core wire, the rear stage pile woven fabric tape, the front stage pile woven fabric tape, and the core wire are bound by a binder 64 so as to fulfill the functions of insulation, sound absorption, and dew condensation prevention.
COPYRIGHT: (C)2011,JPO&INPIT
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Shinsuke Onuki
Tadashige Ito