Side air bag

Abstract

A side air bag expands near a window at a time of collision of a vehicle to restrain an occupant from moving in a lateral direction. The air bag has an expansion duration protracted which is extended to constrain the occupant during overturning of the vehicle. Stowability for stowing the air bag in a folded state in a side structure of the vehicle, such as a pillar and a roof side rail portion, is enhanced in that two woven fabrics are connected along an outer peripheral portion, to form a bag portion, by a textile structure woven using a common yarn include in of both fabrics fabric sheets forming opposing sides of the air bag. A whole of the bag portion is coated and sealed by an air non-permeable impermeable coating material to improve air tightness. A mounting portion for mounting the air bag in the side structure, such as a pillar or a roof side rail, is integrally formed by extending the woven fabrics or the common-yarn textile structure portion outward from the outer peripheral connection portion, thereby improving stowability.

1. A side air bag for inflation by an inflator mechanism for expanding the side air bag alongside a window of a vehicle, comprising:
 a bag portion formed by two woven fabric panels  sheets connected along an  outer peripheral portion  portions thereof by a peripheral connecting portion;  
 said peripheral connecting portion for connecting said two woven fabric panels  sheets being formed by weaving a textile structure having a common yarn included in both of said two woven fabric panels  sheets;  
 said bag portion sealed over a whole area thereof by an air non-permeable  impermeable coating material;  
 a linear connecting portion for partitioning in  said bag portion, said linear connecting portion extending parallel with  to a flow direction of an inflator gas and being formed on  at a center region of said bag portion by stitching connecting said two woven fabric panels  sheets; and  
 an inflator-side teal  terminal portion of the stitching being formed having one of a U-shape or  and a circular shape.  
 
     
     
       2. The side air bag as recited in  claim 1 , wherein an opening for introducing an inflator gas is formed in a part of said peripheral connecting portion. 
     
     
       3. The side air bag according to  claim 1  wherein said peripheral connecting portion is non-continuous having  and has a gap to form  forming an opening for introducing an inflator gas, said opening being defined by said peripheral connecting portion and said two woven fabric panels  sheets. 
     
     
       4. The side air bag as recited in  claim 3 , wherein said bag portion has a cylindrical duct extending therefrom and said opening extends to form a  is provided at an end of said cylindrical duct. 
     
     
       5. The side air bag as recited in  claim 3  or  claim 4 , wherein said opening is disposed at a front end part of the bag portion which is for positioning at a front side of the vehicle. 
     
     
       6. The side air bag as recited in claim  3    1  or claim  1    3 , wherein one of said two woven fabric panels  sheets or said textile structure is extended outwardly from said peripheral connecting portion to form a mounting portion for mounting to a side structure of the vehicle. 
     
     
       7. A side air bag mounted on a roof side rail of a vehicle, for inflation by an inflator mechanism for expanding the side air bag alongside a window of a vehicle, comprising:
   a bag portion formed by two woven fabric sheets connected along outer peripheral portions thereof by a peripheral connecting portion;        a center connecting structure, in a center region of said bag portion, connecting said two woven fabric sheets;        a terminal portion of said center connecting structure being formed in a circular shape; and        an air impermeable coating material being applied on a surface of said bag portion including said peripheral connecting portion and said center connecting structure after formation of said center connecting structure to seal said center connecting structure.     
     
     
       8. The side air bag according to  claim 7 , wherein said peripheral connecting portion for connecting said two woven fabric sheets is formed by weaving a textile structure having a common yarn included in both of said two woven fabric sheets. 
     
     
       9. The side air bag according to  claim 7 , wherein said center connecting structure is formed by stitching. 
     
     
       10. The side air bag according to  claim 7 , wherein said center connecting structure has two ends and an upstream- side terminal portion is formed as the terminal portion.   
     
     
       11. The side air bag according to  claim 7  wherein:
   said center connecting structure extends along a connecting portion length to said terminal portion; and        said circular shape defines a diameter greater than a width of said center connecting structure along said connecting portion length.     
     
     
       12. The side air bag according to  claim 7 , wherein said bag portion defines an inflation opening for introduction of gas by the inflator mechanism and said terminal portion is disposed at an end of said center connecting structure proximate said inflation opening. 
     
     
       13. A side air bag mounted on a roof side rail of a vehicle, for inflation by an inflator mechanism for expanding the side air bag alongside a window of a vehicle, comprising:
   a bag portion formed by two woven fabric sheets connected along outer peripheral portions thereof by a peripheral connecting portion;        a center connecting structure, in a center region of said bag portion, connecting said two woven fabric sheets;        a terminal portion of said center connecting structure being formed in a U - shape; and        an air impermeable coating material being applied on a surface of said bag portion including said peripheral connecting portion and said center connecting structure after formation of said center connecting structure to seal said center connecting structure.     
     
     
       14. The side air bag according to  claim 13 , wherein said peripheral connecting portion for connecting said two woven fabric sheets is formed by weaving a textile structure having a common yarn included in both of said two woven fabric sheets. 
     
     
       15. The side air bag according to  claim 13 , wherein said center connecting structure is formed by stitching. 
     
     
       16. The side air bag according to  claim 13 , wherein said center connecting structure has two ends and an upstream- side terminal portion is formed as the terminal portion.   
     
     
       17. The side air bag according to  claim 13  wherein:
   said center connecting structure extends along a connecting portion length to said terminal portion; and        said U - shape defines a width greater than a width of said center connecting structure along said connecting portion length.     
     
     
       18. The side air bag according to  claim 13 , wherein said bag portion defines an inflation opening for introduction of gas by the inflator mechanism and said terminal portion is disposed at an end of said inner connecting structure proximate said inflation opening.