GB2262919A - Vehicle air bag. - Google Patents

Vehicle air bag. Download PDF

Info

Publication number
GB2262919A
GB2262919A GB9226595A GB9226595A GB2262919A GB 2262919 A GB2262919 A GB 2262919A GB 9226595 A GB9226595 A GB 9226595A GB 9226595 A GB9226595 A GB 9226595A GB 2262919 A GB2262919 A GB 2262919A
Authority
GB
United Kingdom
Prior art keywords
tether belt
air bag
seam
stitching
seams
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9226595A
Other versions
GB2262919B (en
GB9226595D0 (en
Inventor
Akira Kokeguchi
Hideo Nakajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takata Corp
Original Assignee
Takata Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takata Corp filed Critical Takata Corp
Publication of GB9226595D0 publication Critical patent/GB9226595D0/en
Publication of GB2262919A publication Critical patent/GB2262919A/en
Application granted granted Critical
Publication of GB2262919B publication Critical patent/GB2262919B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23382—Internal tether means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/235—Inflatable members characterised by their material
    • B60R2021/23571—Inflatable members characterised by their material characterised by connections between panels
    • B60R2021/23576—Sewing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Woven Fabrics (AREA)

Description

1 A; 2262919
TITLE OF THE INVENTION
Structure for Stitching a Tether Belt of an Air Bag FIELD OF THE INVENTION
The present invention concerns a structure for stitching a tether belt of an air bag in an air bag device mounted on a vehicle. More in particular, it relates to a structure for stitching a tether belt of an air bag capable of firmly stitching the tether belt to the bag.
DESCRIPTION OF THE PRIOR ART
As is well-known, an air bag device is adapted to extend an air bag upon collision of a vehicle or the like thereby protecting an occupant.
In the air bag device, a tether belt is stitched to the bag so that the air bag is extended into a predetermined shaje.
Fig. 2 is a perspective view illustrating the extended shape of an air bag in an air bag device for use in a passenger seat. An air bag 10 is attached at a flanged portion 14 of an opening 12 to a container tot illustrated) by means of bolts or rivets. Then, when a gas from en inflator (not illustrated) is introduced passing through the opening 12 to the inside of the air bag 10, the air 1 bag extends as shown in the drawing. 18 denotes a vent hole.
For keeping the central portion on the front side of the air bag 10 from protruding toward an occupant, the central portion on the front side and a vicinity of the opening 12 of the air bag 10 are connected by a tether belt 20.
Fig. 3 shows a stitching structure between a cloth substrate (base cloth) 22 of the air bag 10 and the tether belt 20 in the prior art. As shown in Fig. 3, a seam 30 is generally in the shape of a numerical figure of "eight" comprising-first and second seams 31, 32 perpendicular to the longitudinal direction of the tether belt 20 and third and fourth seams 33 and 34 oblique to the longitudinal direction. The third and fourth seams 33 and 34 connect the ends of the first and the second seams 31 and 32 to each other. As shown in the drawing, the first and the second sedns 31 and 32 are stitched only the central portion while leaving the lateral ends of the tether belt unstitched.
When the air bag extends, a large tension is applied to the tether belt 20 in the longitudinal direction. In a case where the seam 30 is present only in the central portion of the tether belt 20 as shown in Fig. 3, all the tension including that at the lateral ends of tether belt 2 1 11 are concentrated to the vicinity of the ends of the first and the second seams 31 and 32. In particular, if the tether belt 20 is in an oblique state as shown by dashes and dotted lines in Fig. 3, an extremely large force is exerted near the end A of the seam 31. In view of the above, it has been necessary to firmly set the seams 31 and 32, which makes the stitching of the tether belt 20 laborious.
OBJECT AND SUMMARY OF THE INVENTION
An object of the present invention is to provide a simple and convenient structure capable of firmly connecting a tether belt and air bag.
In accordance with the first aspect of the present invention, in a structure for stitching a tether belt of an air bag in which a tether belt is disposed at the inside of a bag main body of an air bag and an end of the tether belt is stitched to.the bag main body, a seam of the stitclYed portion laterally traverses the tether belt.
In accordance with the second aspect of the present invention, in a structure for stitching a tether belt of an air bag as defined in the first aspect, the seam is generally in the shape of a numeral figure of "eighC comprising a first stitch and a second stitch laterally traversing the tether belt, and third and fourth seams that connect ends of the first and the second seams to 3 each other and obliquely traverse to the tether belt.
According to the structure for stitching a tether belt of an air bag in the present invention, since the seams completely traverse the tether belt, a large stress is prevented from exerting locally on the tether belt even if a tensile stress is applied to the tether belt. Therefore, the stitching strength required for the seams can be reduced to facilitate stitching. In particular, in the second aspect, each of the first through fourth seams completely transverses the tether belt and the tether belt can be retained firmly to a cloth substrate of the bag main body.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a plan view illustrating a structure for stitching a tether belt of an air bag in a preferred embodiment according to the present invention; Fig.--;2 is a perspective view of an air bag for-use in a passenger seat in an extended state; and Fig. 3 is a plan view illustrated a structure for stitching a tether belt of a air bag in the prior art.
PREFERRED EMBODIMENT Fig. 1 is a plan view for a stitched portion illustrating a structure for stitching a tether belt of an air 4 CL is bag in a preferred embodiment according to the present invention. A tether belt 20A is stitched to a cloth substrate (base cloth) 22A of a bag main body by means of a seam 40 which is generally of a shape of a numerical figure of "eight" comprising first, second, third and fourth seams 41, 42, 43 and 44. The first and the second seams 41 and 42 laterally. traverse the tether belt 20 and both ends of the seams are present beyond the tether belt 20A.. The third and the fourth seams 43 and 44 obliquely traverse the tether belt 20A and both ends of the seams are present beyond the tether belt 20A. The third and the fourth seams 43 and 44 connect the ends of the first and the second seams 41 and 42 to each other.
In this way, in the structure for stitching the tether belt of the air bag according to this embodiment, since the seam 40 completely traverses the tether belt, if a tensile stress is applied to the tether belt 20A, a large stress can be prdvented from exerting locally on the tether-belt 20A. Accordingly, the stitching strength required for the seam 40 can be reduced to facilitate stitching. In particular, in this embodiment, each of thefirst through fourth seams 41 - 44 completely traverses the tether belt 20A and the tether belt 20A can firmly be secured to the cloth substrate 22A.
This embodiment concerns an air bag for use in the - 5 passenger seat but the present invention is also applicable to an air bag for use in a driver seat.
As has been described above, in the structure for stitching the tether belt of the air bag in accordance with the present invention, since the seam completely traverses the tether belt, a large stress can be pre vented from exerting locally on the tether belt and the stitching strength required for the seam can be reduced to facilitate stitching.
6 1

Claims (4)

WHAT IS CLAIMED IS
1. A structure for stitching a tether belt of an air bag in which a tether belt is disposed at the inside of the air bag and the end of the tether belt is stitched to said air bag, wherein a seam of a stitched portion laterally traverses the tether belt.
2. A structure for stitching a tether belt of an air bag as defined in claim 1, wherein the seam is generally in the shape of a numerical figure of "eight" comprising a first seam and a second seam laterally traversing the tether belt, as well as a third seam and a fourth seam for connecting the ends of the first seam and the second seam to each other and obliquely traversing the tether belt.
3. A structure as defined in claim 2, wherein each of the firstz-through fourth seams is present also in the portion on the lateral sides of the tether belt.
4. A structure for stitching a tether belt of an air bag substantially as hereinbefore described with reference to Figure 1 of the drawings.
GB9226595A 1992-01-06 1992-12-21 Structure for stitching a tether belt of an air bag Expired - Fee Related GB2262919B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4000255A JPH05186961A (en) 1992-01-06 1992-01-06 Structure for sewing string on air bag

Publications (3)

Publication Number Publication Date
GB9226595D0 GB9226595D0 (en) 1993-02-17
GB2262919A true GB2262919A (en) 1993-07-07
GB2262919B GB2262919B (en) 1995-07-05

Family

ID=11468816

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9226595A Expired - Fee Related GB2262919B (en) 1992-01-06 1992-12-21 Structure for stitching a tether belt of an air bag

Country Status (6)

Country Link
JP (1) JPH05186961A (en)
KR (1) KR930016284A (en)
CA (1) CA2085702A1 (en)
DE (1) DE4300125C2 (en)
FR (1) FR2685894A1 (en)
GB (1) GB2262919B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669632A (en) * 1995-11-03 1997-09-23 Morton International, Inc. Airbag tether and attachment seam
US7625008B2 (en) * 2005-10-17 2009-12-01 Key Safety Systems, Inc. Air bag with groove or recess, open or partially covered
US8657334B2 (en) 2011-02-11 2014-02-25 Key Safety Systems, Inc. Airbag cushion
WO2016064336A1 (en) * 2014-10-24 2016-04-28 Autoliv Development Ab Airbag device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29607302U1 (en) * 1996-04-12 1996-07-04 Petri Ag Airbag module
JP4928829B2 (en) * 2006-05-18 2012-05-09 日本プラスト株式会社 Vehicle airbag
JP5325392B2 (en) * 2007-03-16 2013-10-23 セーレン株式会社 Airbag
US9211864B2 (en) 2012-01-24 2015-12-15 Autoliv Asp, Inc. Tether attachment arrangement for a vehicle airbag cushion and method of attaching
JP6729496B2 (en) * 2017-06-05 2020-07-22 豊田合成株式会社 Side airbag device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4934734A (en) * 1989-03-27 1990-06-19 Juichiro Takada Inflatable air bag for protection of a vehicle occupant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019952A (en) * 1959-05-18 1962-02-06 Brewster Forrest Oliver Back pack convertible to hand-bag
US4966389A (en) * 1989-03-28 1990-10-30 Juichiro Takada Inflatable air bag for protection of a vehicle occupant
JP2524531B2 (en) * 1989-09-08 1996-08-14 池田物産株式会社 Airbag device
JPH0651460B2 (en) * 1990-06-22 1994-07-06 池田物産株式会社 Airbag device with hanging belt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4934734A (en) * 1989-03-27 1990-06-19 Juichiro Takada Inflatable air bag for protection of a vehicle occupant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669632A (en) * 1995-11-03 1997-09-23 Morton International, Inc. Airbag tether and attachment seam
US7625008B2 (en) * 2005-10-17 2009-12-01 Key Safety Systems, Inc. Air bag with groove or recess, open or partially covered
US8657334B2 (en) 2011-02-11 2014-02-25 Key Safety Systems, Inc. Airbag cushion
WO2016064336A1 (en) * 2014-10-24 2016-04-28 Autoliv Development Ab Airbag device

Also Published As

Publication number Publication date
DE4300125A1 (en) 1993-07-08
DE4300125C2 (en) 1997-07-03
FR2685894A1 (en) 1993-07-09
JPH05186961A (en) 1993-07-27
CA2085702A1 (en) 1993-07-07
GB2262919B (en) 1995-07-05
KR930016284A (en) 1993-08-26
FR2685894B1 (en) 1994-12-02
GB9226595D0 (en) 1993-02-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20111221