Vehicular air-conditioning duct structure and forming method, and vehicular electric-wiring fixing structure

A vehicular air-conditioning duct structure included in a beam member, comprising:

• at least two beam member bodies divided in their longitudinal direction, the at least two beam member bodies forming the beam member;
• and
• at least two duct bodies divided in the longitudinal direction of the beam member and having a material for a duct molded into a predetermined shape, the at least two duct bodies being formed by a material having a heat-insulating property wherein,
• after the at least two duct bodies have been incorporated in an inside of the at least two beam member bodies, the at least two beam member bodies are combined so that respective joining surfaces of each beam member body are surfaces of the beam member bodies and face each other and join thereby forming a closed tubular structure;
• and gradually changing portions for gradually changing the closed tubular structure in a vicinity of the joining surfaces are formed adjacent the joining surfaces, and the material for the duct is compressed by the gradually changing portions.

A vehicular air-conditioning duct structure included in a beam member, comprising:

• two beam member bodies divided in a longitudinal direction of the beam member,
• wherein a material for a duct has a heat-insulating property and is integrated on an inner surface of the first beam member body;
• a duct body having the material for the duct molded into a predetermined shape and incorporated in the inside of the second beam member body;
• and
• at least two beam member bodies combined so that joining surfaces of each beam member body are surfaces of the beam member bodies and face each other in order to join the joining surfaces and form a closed, tubular structure;
• and
• gradually changing portions for gradually changing the closed tubular structure in a vicinity of the joining surfaces are formed adjacent the joining surfaces, and the material for the duct is compressed by the gradually changing portions.