Abstract: An air bag provided with linear joined portions in the inflation section is disclosed. The linear joined portions linearly join the opposing wall portions of the inflation section. Each of the linear joined portions includes a body portion and end portions. The end portions extend from the body portion and gradually become wider than the body portion. The periphery surrounds the end portions and is provided with at least three straight portions. This air bag restrains mesh spreading and inflating gas leakage from the vicinity of any of the end portions of the linear joined portions.

Abstract: An air bag is stored in the upper fringe of the openings on the cabin-inside side, while being folded. The air bag includes a gas inflow part for flowing inflation gas into the air bag, and a main body that inflates when receiving the inflation gas. The main body includes front- and rear-seat inflation chambers, and a gas passage extending forwardly from the gas inflow part and allowing the inflation gas to flow from inflow ports opened in the upper parts of the front- and rear-seat inflation chambers to the front- and rear-seat inflation chambers per se. The inflow port of the rear-seat inflation chamber is opened in a direction substantially orthogonal to an axial direction of the gas passage. A front-side peripheral edge is disposed to be higher than a rear-side peripheral edge.

Abstract: An integrally woven airbag includes a hollow portion with two opposing sides formed in a first weave pattern and a single-cloth portion where the two opposing sides are woven together as a single cloth. The single-cloth portion is formed by a 3/n basket weave, where n is one in the boundary portion and is an integer greater than one in a portion of the single-cloth portion excluding the boundary portion. A cover factor of the single-cloth portion is at least 4100.

Abstract: An air bag is stored along the peripheral edge of the upper fringe of an opening on the indoor side in a state that it is covered with a door of an air bag cover and folded. When receiving inflation gas, the air bag forcibly opens the door and develops and inflates downward so as to cover the opening. In a region of an inflating section to which gas for inflation flows, a plurality of thickness defining members, which couple the cabin-inside side wall with the cabin-outside side wall to make a thickness of the inflating section uniform, are arranged side by side in the front/rear direction, while extending in the vertical direction. The thickness defining member disposed near the unsmooth development part of the door is disposed such that the upper end thereof is located at a position lower than the upper end of the thickness defining member.

Abstract: An airbag including an expansion part accommodating inflow of expansion gas to expand a peripheral wall, and linear joining portions arranged in a region of the expansion part and constituted by joining facing portions of the peripheral wall in a linear manner. The linear joining portions include a linear base, curved portions and swelling portions. Each of the curved portions is connected to the base and curvilinearly extends and bends toward the respective base thereof. The swelling portions are arranged at tip ends of the curved portions to smoothly connect outer peripheral edges thereof to outer peripheral edges of the curved portions. With this airbag, stress concentration is reduced around the swelling portions and the curved portions at the time of development and expansion. Thus, the linear joining portions can be arranged without causing breakage of the peripheral wall during development and expansion, and reduction in volume and expansion area held down as much as possible.

Abstract: An airbag device is provided with a double-woven coated airbag in which average values of the number of warps and wefts per square inch in double-weaving are 49 to 50 in one embodiment or 51 or more in another embodiment. With the airbag, peak inner pressure values before and after completion of expansion are set corresponding to the coating weight of the coating agent on the basis of a straight-line formula for a relationship between peak inner pressure values and the coating agent at the time of inflowing of the expansion gas.

Abstract: An air bag is stored in the upper fringe of the openings on the cabin-inside side, while being folded. The air bag includes a gas inflow part for flowing inflation gas into the air bag, and a main body which inflates when receiving the inflation gas. The main body includes front- and rear-seat inflation chambers, and a gas passage extending forward from the gas inflow part and allowing the inflation gas to flow from inflow ports opened in the upper parts of the front-and rear-seat inflation chambers to the front- and rear-seat inflation chambers per se. The inflow port of the rear-seat inflation chamber is opened in a direction substantially orthogonal to an axial direction of the gas passage. A front-side peripheral edge is disposed to be higher than a rear-side peripheral edge.

Abstract: An air bag is stored along the peripheral edge of the upper fringe of an opening on the indoor side in a state that it is covered with a door of an air bag cover and folded. When receiving inflation gas, the air bag forcibly opens the door and develops and inflates downward so as to cover the opening. In a region of an inflating section to which gas for inflation flows, a plurality of thickness defining members, which couple the cabin-inside side wall with the cabin-outside side wall to make a thickness of the inflating section uniform, are arranged side by side in the front/rear direction, while extending in the vertical direction. The thickness defining member disposed near the unsmooth development part of the door is disposed such that the upper end thereof is located at a position lower than the upper end of the thickness defining member.

Abstract: An air bag provided with linear joined portions in the inflation section is disclosed. The linear joined portions linearly join the opposing wall portions of the inflation section. Each of the linear joined portions includes a body portion and end portions. The end portions extend from the body portion and gradually become wider than the body portion. The periphery surrounds the end portions and is provided with at least three straight portions. This air bag restrains mesh spreading and inflating gas leakage from the vicinity of any of the end portions of the linear joined portions.

Abstract: An airbag device is provided with a double-woven coated airbag in which average values of the number of warps and wefts per square inch in double-weaving are 49 to 50 in one embodiment or 51 or more in another embodiment. With the airbag, peak inner pressure values before and after completion of expansion are set corresponding to the coating weight of the coating agent on the basis of a straight-line formula for a relationship between peak inner pressure values and the coating agent at the time of inflowing of the expansion gas.

Abstract: An airbag including an expansion part accommodating inflow of expansion gas to expand a peripheral wall, and linear joining portions arranged in a region of the expansion part and constituted by joining facing portions of the peripheral wall in a linear manner. The linear joining portions include a linear base, curved portions and swelling portions. The curved portions are connected to the base to curvilinearly bend toward ends thereof. The swelling portions are arranged at tip ends of the curved portions to smoothly connect outer peripheral edges thereof to outer peripheral edges of the curved portions. With this airbag, stress concentration is reduced around the swelling portions and the curved portions at the time of development and expansion. Thus, the linear joining portions can be arranged without causing breakage of the peripheral wall during development and expansion, and reduction in volume and expansion area held down as much as possible.

Abstract: An integrally woven airbag includes a hollow portion with two opposing sides formed in a first weave pattern and a single-cloth portion where the two opposing sides are woven together as a single cloth. The single-cloth portion is formed by a 3/n basket weave, where n is one in the boundary portion and is an integer greater than one in a portion of the single-cloth portion excluding the boundary portion. A cover factor of the single-cloth portion is at least 4100.