Manufacturing method for air bag and air bag device for a passenger

• US 5,913,535 A
• Filed: 08/09/1996
• Issued: 06/22/1999
• Est. Priority Date: 08/11/1995
• Status: Expired due to Term

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Taguchi, Masahiro, Suzuki, Tomoji, Yamanaka, Shoichi
• Primary Examiner(s): Culbreth, Eric D.
• Application Number:
  US08/694,825
• Time in Patent Office: 1,047 Days
• Field of Search: 280/729, 280/740, 280/743.1, 280/742, 280/736
• US Class Current: 280/729
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/2346 Soft diffusers

Abstract

The present invention provides a manufacturing method for an air bag which can simply form an inner bag inside a outer bag. Cloth members of the inner bag are mounted within the outer bag and the outer bag is sewn together along its peripheries except its folded portion and a gas inlet hole for introducing gas from an inflator, by using threads. Thereafter the cloth members of the inner bag are put into the outer bag, and the cloth members of the inner bag are pulled out of the outer bag through the gas inlet hole. Thereafter, the cloth members of the inner bag are sewn together along their peripheries by using a thread. Thus, the cloth members of the inner bag are formed into a bag. Finally, putting the inner bag into the outer bag makes the air bag completed.

Claims

1. A manufacturing method for an air bag said method comprising the step of:

a first step of sewing one pair of cloth members forming an inner bag to an outer bag in the vicinity of a common hole formed at an edge portion of said outer bag, said common hole being provided on said outer and inner bags commonly;

a second step of sewing said outer bag to itself along a periphery thereof excluding said common hole to form said outer bag;

a third step of passing said outer bag through said common hole formed at said edge portion of said outer bag to turn over said outer bag;

a fourth step of sewing said one pair of cloth members together along a periphery thereof excluding said common hole to form said inner bag; and

a fifth step of putting said inner bag into said outer bag through said common hole so that inner bag is disposed within said outer bag.

2. A manufacturing method for an air bag according to claim 1, wherein said first step includes a step of sewing a reinforcing cloth member to said outer bag in the vicinity of said common hole together with said one pair of cloth members.

3. A manufacturing method for an air bag according to claim 1, wherein said third step includes steps of:

putting said one pair of cloth members into said outer bag turned over; and

pulling said one pair of cloth members out of said outer bag through said common hole after said step of putting said one pair of cloth members into said outer bag turned over.

4. A manufacturing method for an air bag said method comprising the steps of:

a first step of sewing a first cloth member of an inner bag to one end portion of a single cloth member of an outer bag;

a second step of sewing a second cloth member of said inner bag to another end portion of said single cloth member of said outer bag;

a third step of folding said single cloth member of said outer bag in such a manner that said first and second cloth members of said inner bag face outwardly from said single cloth member of said outer bag;

a fourth step of sewing said folded single cloth member of said outer bag along a periphery thereof except at said one and another end portions sewn to said first and second cloth members of said inner bag to form said outer bag and to from a common hole;

a fifth step of passing said outer bag through said common hole to turn over said outer bag;

a sixth step of placing said first and second cloth members of said inner bag in registration and sewing said first and second cloth members together along peripheries thereof to form said inner bag; and

a seventh step of putting said inner bag into said outer bag through said common hole.

5. A manufacturing method for an air bag according to claim 4, wherein said fourth step includes steps of:

putting said first and second cloth members of said inner bag into said outer bag turned over; and

pulling said first and second cloth members of said inner bag out of said outer bag through said common hole after said step of putting said first and second cloth members of said inner bag into said outer bag turned over.

6. A manufacturing method for an air bag said method comprising the steps of:

a first step of aligning a common hole with a through-hole, said common hole being formed in a first body portion forming a part of an outer bag, said through-hole being formed in a single cloth member forming an inner bag;

a second step of sewing said single cloth member said inner bag to said first body portion on one side of said first body portion around said common hole;

a third step of placing a second body portion on the other side of said first body portion, said second body portion being substantially the same in size as said first body portion and forming another part of said outer bag;

a fourth step of sewing said first and second body portions of said upper bag together along peripheries thereof to form said outer bag;

a fifth step of passing said outer bag through said common hole to turn over said outer bag;

a sixth of folding said single cloth member of said inner bag which is passed through from said common hole;

a seventh step of sewing peripheries of said single cloth member of said inner bag to from said inner bag; and

a eighth step of putting said inner bag into said outer bag through said common hole.

7. A manufacturing method for an air bag according to claim 6, wherein said third step includes steps of:

putting said single cloth member of said inner bag into said outer bag turned over; and

pulling said single cloth member of said inner bag out of said outer bag through said common hole after said step of putting said single cloth member of said inner bag into said outer bag turned over.