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: A guide plate 45 is placed at a guiding and holding member 42 which is fixed to a region of an inner panel 34 adjacent to the upper end portion 49A of a B pillar garnish. The guide plate 45 has a base end portion 45A which extends from the vehicle interior side to the vehicle exterior side. The base end portion 45A is fixed to the guiding and holding member 42. The cross sectional configuration of the guide plate 45 when viewed from the vehicle front is formed in a substantial U shape which surrounds the folded air bag body and whose opening portion faces the outer side of the vehicle interior. When the air bag body is expanded, the guide plate 45 is extended as well so as to cover the upper end portion 49A of the center pillar garnish 49. As a result, the air bag body can expand more smoothly, and the displacement of the center pillar garnish from the vehicle body can be prevented.

Abstract: A guide plate 45 is placed at a guiding and holding member 42 which is fixed to a region of an inner panel 34 adjacent to the upper end portion 49A of a B pillar garnish. The guide plate 45 has a base end portion 45A which extends from the vehicle interior side to the vehicle exterior side. The base end portion 45A is fixed to the guiding and holding member 42. The cross sectional configuration of the guide plate 45 when viewed from the vehicle front is formed in a substantial U shape which surrounds the folded air bag body and whose opening portion faces the outer side of the vehicle interior. When the air bag body is expanded, the guide plate 45 is extended as well so as to cover the upper end portion 49A of the center pillar garnish 49. As a result, the air bag body can expand more smoothly, and the displacement of the center pillar garnish from the vehicle body can be prevented.

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: Mounting portions of an air bag body are respectively nipped by positioning plates which are each fastened and fixed to a pillar inner panel by a weld nut and a bolt via the plates. Caulking portions are formed on the plates so that the mounting portions of the air bag device are in advance fixed between the plates. A convex portion is formed on the plate, and with the convex portion being engaged with a hole formed in the pillar inner panel, relative rotation of the plate and a vehicle body is prevented. As a result, rotation of the air bag body in a direction in which the mounting portions are fastened, which occurs during mounting of the air bag body to the vehicle body, can be prevented.

Abstract: An air bag for a side air bag device is folded and accommodated over a roof side rail portion on the peripheral edge of an opening in an interior side of a vehicle. The air bag is developed and expanded to cover the opening when an inflating gas flows in. In the air bag, the internal pressure of the inflating gas at 3 secs after the start of inflow is maintained at 30% or more of the internal pressure at 500 msecs after the start of inflow. This air bag can maintain the high internal pressure for a long time.

Abstract: A head protecting air bag apparatus includes a lid and an air bag. The lid is disposed at an upper edge side periphery of an opening at a vehicle's inner side in a vehicle body and at an upper portion of a pillar portion. The air bag is attached to the vehicle's inner side of the vehicle body, is housed at a vehicle's outer side position of the lid in a folded state, and pushes and opens the lid to cover the opening when unfolding and expansion is caused by inflow of gas for expansion. The air bag is folded so that a lower edge side approaches an upper edge side, and an attachment portion at the upper edge side is attached to the vehicle body so that the air bag is housed at the vehicle's outer side of the lid. A part of a lower end of the lid is disposed at a vehicle's outer side of an upper end of a pillar garnish covering a vehicle's inner side of the pillar portion.

Abstract: An air bag (11) for a side air bag device capable of reducing the size and weight of the device (M1) while retaining a tension line (L--L) when expanded is mounted on the peripheral edge of a door opening (W) at the inside of a compartment, and is formed into a generally rectangular bag shape for covering the door opening when expanded, while being equipped with a gas inlet (19) for introducing an expanding gas. The air bag is provided with joints (22) jointing an inner side wall (12) and an outer side wall (13) partially so as to form a tension line L--L when expanded. The individual joints (22) are juxtaposed in plurality along the tension line so as to cross the tension line, and are arranged generally at vertically middle portions so as to form one expansion chamber (18) having upper and lower spaces (18a and 18b) for the expanding gas to flow therethrough.

Abstract: A side air bag device has an air bag and a substantially cylindrical inflator for supplying inflation gas to the air bag. The air bag includes a cloth bag and is installed in a vehicle interior in a folded state along the edge of a door opening. The air bag deploys so as to cover the door opening when it inflates. The air bag has a substantially cylindrical tubular gas inflow portion. This gas inflow portion is connected to the inflator so that it covers the inflator. The gas inflow portion is clamped to the outer circumferential surface of the inflator. With a side air bag device according to the invention it is not necessary to use a long pipe that from the inflator and it is possible to increase the freedom of installation of the device and also reduce its weight and cost.

Abstract: Garnish members according to this invention are installed and fixed to peripheries of a door opening in the interior of a vehicle body. The garnish members have an air bag therein and include elongate garnish bodies disposed in the interior of a vehicle body fixing portions. The fixing portions are hinged to the garnish bodies at a rear side of the garnish bodies and can be fixed to the body. The fixing portions include brackets capable of maintaining folding conditions of the air bag, which brackets can be ruptured when the air bag is inflated.