Patent ID: 7484752

Claim:
An airbag apparatus for attachment to a vehicle instrument panel comprising: an airbag; an airbag case in which the airbag is accommodated in a folded state; a frame of resin material supporting said airbag case, said frame having a surface adapted to be attached to a back surface of a vehicle instrument panel surrounding a split opening section of the instrument panel, said frame having a joint flange adapted to be attached to the back surface of the instrument panel, said joint flange having a number of first weld ribs with a predetermined width to be vibration-welded to the back surface of the instrument panel, said first weld ribs having a length extending in the vibration direction of the vibration welding and said first weld ribs being spaced at predetermined intervals in a direction perpendicular to the direction of vibration welding, first passages for flowing a cooling fluid along said first weld ribs and cooling fluid supply and discharge ports for supplying and discharging fluid from said first passages; and reinforcement members affixed to the frame to reinforce said split opening section of said instrument panel, said reinforcement members having a number of second weld ribs having a length extending in the vibration direction of the vibration welding and said second weld ribs being spaced at predetermined intervals in a direction perpendicular to the direction of vibration welding.