Toyoda Gosei Co., Ltd.

Shoji Okajima

Hiroshi Ogawa

Takashi Yamamoto

Takanobu Ikeda

Hiroshi Yasuda

Katsuhiko Kato

Mitsuru Sugaya

An airbag comprises an airbag body, and a wrapping member made tearable for preventing the airbag body from returning to its unfolded state. The airbag body is folded and housed on the peripheral edge of an opening on the inner side of a car body, and is folded up into a rod shape so that it may be inflated when an inflating gas flows thereinto so as to cover the opening. The wrapping member is made flexible and long and is wrapped on the outer periphery of the folded airbag body substantially all along the length of the same, so that it may extend obliquely to the axial direction of the airbag body folded up into the rod-like shape. Moreover, the airbag is restrained in its proper folded state substantially all along its length by a simple wrapping operation.

Airbag and its wrapping method

An airbag according to the present invention comprises an airbag body and a plurality of tearable wrapping yarns. The wrapping yarns are wound around the outer circumference of the wrapping area of the airbag body as folded into a generally rod-like shape, along the axial direction of the airbag body and to obliquely intersect the axial direction. In the wrapping area, at least two of the wrapping yarns are wound from the opposite directions to each other. The distance between the adjacent wrapping yarns along the axial direction of the airbag body is within the range of 20 to 60 mm in the wrapping area. The yarn strength of each wrapping yarn is within the range of 7.4 to 65N. In the airbag of the present invention, the airbag body in the wrapping area is kept in a compact shape by a simple wrapping work, while securing the smooth expansion and inflation.

Airbag

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Aichi-ken, Japan

Shoji Okajima