SIDE AIRBAG DEVICE AND METHOD OF SEWING SIDE AIRBAG
1 Assignment
0 Petitions
Accused Products
Abstract
A side airbag device has: a side airbag that inflates and expands at a time of a side collision, and that has a lower chamber (high pressure chamber), and an upper chamber (low pressure chamber), the high pressure chamber and the low pressure chamber being formed by base cloths (a lower base cloth, an upper base cloth) that are respectively separate bodies; an inflator; a partitioning wall that is formed by a portion of the lower base cloth, and that divides the lower chamber and the upper chamber; and a check valve that is provided at a partial region of the partitioning wall, and that is provided convexly toward the lower chamber side when the side airbag is not inflated, and that permits flowing of the gas for inflation from the upper chamber side to the lower chamber side, and restricts flowing of gas in a direction opposite thereto.
46 Citations
15 Claims
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1. (canceled)
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2. A side airbag device comprising:
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a side airbag that inflates and expands at a time of a side collision, and that has a high pressure chamber that becomes a high pressure side at a time of inflation and expansion, and a low pressure chamber that becomes a lower pressure than the high pressure chamber, the high pressure chamber and the low pressure chamber being formed by base cloths that are respectively separate bodies; an inflator that supplies gas for inflation into the side airbag; a partitioning wall that is formed by a portion of a base cloth that forms the high pressure chamber, and that divides the high pressure chamber and the low pressure chamber; and a check valve that is provided at a partial region of the partitioning wall, and that is provided convexly toward the high pressure chamber side when the side airbag is not inflated, and that permits flowing of the gas for inflation from the low pressure chamber side to the high pressure chamber side, and restricts flowing of gas in a direction opposite thereto, wherein the base cloth that forms the high pressure chamber is folded in two convexly toward the high pressure chamber side at a region that becomes a central portion of the partitioning wall, and is further folded-over respectively toward a bag outer side and the high pressure chamber side at both end portions in a bag thickness direction of a region that becomes the partitioning wall, and end edges that are positioned at a peripheral edge portion of the high pressure chamber are sewn together. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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3. A side airbag device comprising:
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a side airbag that inflates and expands at a time of a side collision, and that has a high pressure chamber that becomes a high pressure side at a time of inflation and expansion, and a low pressure chamber that becomes a lower pressure than the high pressure chamber, the high pressure chamber and the tow pressure chamber being formed by base cloths that are respectively separate bodies; an inflator that supplies gas for inflation into the side airbag; a partitioning wall that is formed by a portion of a base cloth that forms the high pressure chamber, and that divides the high pressure chamber and the low pressure chamber; and a check valve that is provided at a partial region of the partitioning wall, and that is provided convexly toward the high pressure chamber side when the side airbag is not inflated, and that permits flowing of the gas for inflation from the low pressure chamber side to the high pressure chamber side, and restricts flowing of gas in a direction opposite thereto, wherein the base cloth that forms the high pressure chamber is folded in two at a bottom portion of the high pressure chamber, and is folded-over respectively toward a bag inner side and the high pressure chamber side at both end portions in a bag thickness direction of a region that becomes the partitioning wall, and end edges that are positioned at a central portion of the partitioning wall are sewn together, and end edges that are positioned at a peripheral edge portion of the high pressure chamber are sewn together.
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12. (canceled)
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13. A method of sewing a side airbag, the side airbag having a high pressure chamber that becomes a high pressure side at a time of inflation and expansion, and a low pressure chamber that becomes a lower pressure than the high pressure chamber, and in which the high pressure chamber and the low pressure chamber are formed by base cloths, that are respectively separate bodies, and are divided by a partitioning wall, and in which the partitioning wall is formed by a portion of a base cloth that forms the high pressure chamber, the method comprising:
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a step of forming, at a partial region of the partitioning wall, a check valve that permits flowing of gas for inflation from the low pressure chamber side to the high pressure chamber side, and restricts flowing of the gas in a direction opposite thereto; a step of folding the base cloth that forms the high pressure chamber in two convexly toward the high pressure chamber side at a region that becomes a central portion of the partitioning wall, and sewing both end portions in a bag thickness direction of a region that becomes the partitioning wall to a base cloth that forms the low pressure chamber; and a step of folding-over the base cloth that forms the high pressure chamber, respectively toward a bag outer side and the high pressure chamber side at both end portions in the bag thickness direction of the region that becomes the partitioning wall, and, at a peripheral edge portion of the high pressure chamber, sewing together end edges of the base cloth that forms the high pressure chamber, and, at a peripheral edge portion of the low pressure chamber, sewing together end edges of the base cloth that forms the low pressure chamber.
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14. A method of sewing a side airbag, the side airbag having a high pressure chamber that becomes a high pressure side at a time of inflation and expansion, and a low pressure chamber that becomes a lower pressure than the high pressure chamber, and in which the high pressure chamber and the low pressure chamber are formed by base cloths, that are respectively separate bodies, and are divided by a partitioning wall, and in which the
partitioning wall is formed by a portion of a base cloth that forms the high pressure chamber, the method comprising: -
a step of forming, at a partial region of the partitioning wall, a check valve that permits flowing of gas for inflation from the low pressure chamber side to the high pressure chamber side, and restricts flowing of the gas in a direction opposite thereto; a step of folding the base cloth that forms the high pressure chamber in two at a bottom portion of the high pressure chamber, and sewing both end portions in a bag thickness direction of a region that becomes the partitioning wall, at the base cloth, to a base cloth that forms the low pressure chamber; a step of folding-over the base cloth that forms the high pressure chamber, respectively toward a bag inner side and the high pressure chamber side from a position sewn with the base cloth that forms the low pressure chamber, and sewing end edges thereof together excluding the partial region that becomes the check valve; and at a peripheral edge portion of the high pressure chamber, sewing together end edges of the base cloth that forms the high pressure chamber, and, at a peripheral edge portion of the low pressure chamber, sewing together end edges of the base cloth that forms the low pressure chamber.
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15. A side airbag device comprising:
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a side airbag that inflates and expands at a time of a side collision and is formed by sewing peripheral edge portions of a facing base cloth, and that has an initially inflated portion to which gas for inflation is supplied at an initial stage of inflation and expansion, a lower chamber that becomes a high pressure side at a time of inflation and expansion and corresponds to a waist portion of a passenger seated in a vehicle seat, an upper chamber that becomes a high pressure side at a time of inflation and expansion and corresponds to a shoulder portion of the passenger, and an intermediate chamber that becomes a lower pressure than the lower chamber and the upper chamber at a time of inflation and expansion and corresponds to a chest portion of the passenger; an inflator that supplies gas for inflation to the initially inflated portion of the side airbag; a lower partitioning wall that is provided within the side airbag, and that divides the lower chamber and the intermediate chamber, and divides the lower chamber and the initially inflated portion; a lower check valve that is provided at a partial region of the lower partitioning wall, and that is provided convexly toward the lower chamber side when the side airbag is not inflated, and that permits flowing of the gas for inflation from the initially inflated portion side to the lower chamber side, and restricts flowing of gas in a direction opposite thereto; an upper partitioning wall that is provided within the side airbag, and that divides the upper chamber and the intermediate chamber, and divides the upper chamber and the initially inflated portion; an upper check valve that is provided at a partial region of the upper partitioning wall, and that is provided convexly toward the upper chamber side when the side airbag is not inflated, and that permits flowing of the gas for inflation from the initially inflated portion side to the upper chamber side, and restricts flowing of gas in a direction opposite thereto; and an intermediate partitioning wall that is provided within the side airbag so as to divide the initially inflated portion and the intermediate chamber, and in which is provided an air hole that permits inflow of gas from the initially inflated portion to the intermediate chamber.
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Specification