Sumisho Airbag Systems Co., Ltd.

Masatoshi Yoshida

Teppei Harabayashi

Yoshinori Kami

Tadashi Takemoto

Kazuyuki Obara

Takeshi Tanaka

Provided is an airbag which further reduces the degree of injury to a vehicle occupant while also exhibiting sufficient occupant protection performance using less output from the inflator, by both preventing airbag internal pressure from rising excessively when making contact with the occupant and increasing the speed of deployment in an occupant-protection area. This hollow-weave airbag has an opening in a main chamber that inflates for the purpose of occupant protection, a structure wherein a first yarn extending separatingly from a first fabric layer of the opening to a non-inflating portion is caught on a float yarn extending on the inside of a second fabric layer and subsequently caught on a float yarn extending on the inside of the first fabric layer, this structure being repeated at least once and forming a pair with another structure wherein a second yarn extending separatingly from the second fabric layer of the opening to the non-inflating portion is caught on the float yarn extending on the inside of the first fabric layer and subsequently caught on the float yarn extending on the inside of the second fabric layer, this structure being repeated at least once.

Airbag

Provided is a bag body which has a flatter shape in its expanded state. This bag body has control yarn therein, which controls expansion. The control yarn includes: a first seam which extends from a non-expansion section to another non-expansion section within the bag body; a second seam which is a seam forming the fabric on one surface of the expansion section of the bag body, and is formed by being separated from the fabric on said one surface, threaded through the first seam, and turned back to the fabric on said one surface; and a third seam which is a seam forming the fabric on the other surface of the expansion section of the bag body, and is formed by being separated from the fabric on the other surface, threaded through the first seam, and turned back to the fabric on the other surface. A control seam group, which is configured from the first to third seams, includes: a first seam unit that is configured such that the two or more second seams alone are consecutively threaded through the first seam; and a second seam unit that is configured such that the two or more third seams alone are consecutively threaded through the first seam. The first and second seam units are alternately arranged in the direction in which the first seam extends.

Bag body

Provided is an air-bag capable of further reducing damage value to a passenger and limiting the amount of use of inflator gas by limiting an excessive increase in the internal pressure of the air-bag upon contacting the passenger while increasing the speed of deployment in a passenger protection area. The air-bag includes a main chamber and a sub-chamber that are connected via a communication portion, wherein the communication portion or a region adjacent to the communication portion is configured of a multilayer structure portion comprising three or more layers.

Air-bag

Provided is an air-bag integrally formed by hollow weaving and including a control seam for restricting expansion. The control seam is extended from the base fabric on one surface of an expansion portion of the air-bag to the base fabric on another surface, and the base fabrics are joined. The control seam extending from the base fabric on the one surface to the base fabric on the other surface, and the control seam extending symmetrically from the base fabric on the other surface to the base fabric on the one surface constitute a pair of control seams One or more pairs of the restriction yarns are arranged in a block shape, forming a restriction yarn block. Adjacent restriction yarn blocks are disposed in a parallelly staggered manner with respect to the direction in which the restriction yarns extend.

Provided is an airbag having a function for controlling bag-section expansion while also retaining air-tightness, by reducing the concentration of stress applied to restriction threads during deployment. Provided is a bag body having, in the interior, restriction threads for restricting expansion, wherein the restriction threads comprise: first yarn extending in the interior of the bag body from a non-expanding section to a different non-expanding section; second yarn which forms a base fabric of one side of an expanding section of the bag body and which is separated from the one side and is caught on the first yarn, or is woven with the first yarn to constitute a structure, again returning to the base fabric of the one side; and third yarn which forms a base fabric of the other side of the expanding section of the bag body and which is separated from the other side and is caught on the first yarn, or is woven with the first yarn to constitute a structure, again returning to the base fabric of the other side.

Disclosed is a curtain bag that can obtain a necessary inflated state in a short period of time without applying excessive localized force to a peripheral joining section or an inner joining section, and that is improved in the ability to suppress the ejection of passengers out from a vehicle specifically by a lateral collision. A portion of the curtain bag and/or the peripheral edge is shaped so as to snag the bottom sill of a window, and the inner joining section of the region that contacts the section below the bottom sill of the window is shaped with a plurality of dots and/or given an expandable form across effectively the entire surface and/or given a form that has increased bending stiffness.

Growing community of inventors

Matsuura, Japan

Masatoshi Yoshida