Patent ID: 8425285

Claim:
A duct installation structure, comprising: an air conditioning duct for sending warm air or cold air into a vehicle interior of an automobile attached to a vehicle interior structure member; and an outlet grill attached to an outlet opening end portion of the air conditioning duct, the outlet opening end portion including a lower plate portion constituting a lower face of the outlet opening end portion, and an upper plate portion constituting an upper face of the outlet opening end portion, wherein a plurality of grill fixing portions to which the outlet grill is to be fixed is integrally molded with a duct main body portion at the outlet opening end portion of the air conditioning duct, wherein the outlet grill is directly fixed to the grill fixing portions, the outlet opening end portion of the air conditioning duct including, at one point near its center in a width direction, a fastening fixing portion that is fastened and fixed to the vehicle interior structure member and including, at its opposite ends in the width direction, a pair of contact portions for coming in contact with the vehicle interior structure member, wherein the lower plate portion protrudes farther forward with respect to a direction of travel of the warm or cold air than does the upper plate portion, wherein the lower plate portion is provided with a plurality of the grill fixing portions having a spring nut attached thereto for receiving a fastener, each of the grill fixing portions is formed to rise higher than the lower plate portion, and wherein the fastening fixing portion is formed in the lower plate portion.