Vehicle airbag device and manufacturing method therefor

A vehicle airbag device, the airbag device comprising:

• a vehicle airbag cushion that is deployed and expanded by inflator gas ejected from an inflator, wherein
• the airbag cushion includes:
• first and second panel parts that are folded or overlapped so as to face each other,
• first and second expansion parts integrally provided on the first and second panel parts, respectively, in a manner protruding outwardly therefrom,
• an overlapping section at a rear side of the airbag cushion formed by overlapping the first expansion part of the first panel part on the second panel part, and overlapping the second expansion part of the second panel part on the first panel part, and joining each of the first and second expansion parts to at a seams along edges of the first and second expansion parts,
• an outer sewn section that joins outer edges of the first and second panel parts that face each other, forming a hollow bag body,
• inflator insertion holes provided through the overlapping section for inserting the inflator with stud bolts into the inside of the bag body,
• bolt insertion holes provided through the overlapping section and through which the stud bolts of the inflator are inserted and protrude to the outside of the bag body, and
• a further overlapping section formed at the rear side of the airbag cushion and spaced from the overlapping section, the further overlapping section defined by a first further expansion part of the first panel overlapping with a second further expansion part of the second panel.