Airbag for head protecting airbag system

摘要

An airbag (20) for a head protecting airbag system (M1) is adapted to be folded up and accommodated along an upper interior edge of a vehicle and to be developed and inflated to cover an interior opening (W) of the vehicle. The airbag (20) comprises a flexible airbag body (21) and a flexible belt portion (40). The airbag body (20) includes an inflatable portion (22) adapted to be inflated to cover the interior opening (W) when the airbag (20) is inflated. The inflatable portion (22) includes a longitudinal rod portion (29) adapted to be inflated substantially vertically into a column shape. The longitudinal rod portion (29) is arranged on one end side of the front end side or the rear end side of the inflatable portion (22). The belt portion (40) is joined at its proximal portion (40b,c) to the peripheral edge of the longitudinal rod portion (29) and is fixed at its distal end portion (40d) on the vehicle. When the airbag body (21) is inflated, the lower end side (29b) of the longitudinal rod portion (29) may be turned on the upper end side (29a) of the longitudinal rod portion (29) in the forward or backward direction away from the inflatable portion (24). Thus, a high tension (F) is established on the lower edge (21a) of the airbag body (21).