CA2085702A1 - Structure for stitching a tether belt of an air bag - Google Patents
Structure for stitching a tether belt of an air bagInfo
- Publication number
- CA2085702A1 CA2085702A1 CA002085702A CA2085702A CA2085702A1 CA 2085702 A1 CA2085702 A1 CA 2085702A1 CA 002085702 A CA002085702 A CA 002085702A CA 2085702 A CA2085702 A CA 2085702A CA 2085702 A1 CA2085702 A1 CA 2085702A1
- Authority
- CA
- Canada
- Prior art keywords
- tether belt
- air bag
- stitching
- seam
- 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.)
- Abandoned
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
-
- 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
- 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
Abstract
ABSTRACT OF THE DISCLOSURE
A structure for stitching a tether belt of an air bag in which the tether belt is disposed at the inside o-f a bag main body of the air bag and the ends of the tether belts are stitched to the bag main body, wherein the seam of the stitched portion transverses laterally the tether belt.
A structure for stitching a tether belt of an air bag in which the tether belt is disposed at the inside o-f a bag main body of the air bag and the ends of the tether belts are stitched to the bag main body, wherein the seam of the stitched portion transverses laterally the tether belt.
Description
2~ 7~
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 stit-ching 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-l~nown, 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 predeter-mined sha~e.
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 lO is attached at a flanged portion 14 of an opening 12 to a container not illustrated by means of bolts or rivets. Then, when a gas from a inflator (not illustrated) is introduced passing through the opening 12 to the inside of the air bag 10, the air 2 ~ ~ 5 7 ~ ~
.
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 in 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 se~ms 31 and 32 are stitched only the central portion while leaving the lateral ends of the tether belt 20 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~ 7~2 20 are concentrated to the vicinity o~ the ends o-f 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.
t OBJECT AND SUMMARY OF THE INVENTION
An object of the present invention is to provide a simple and convenient structure capable of firmly connec-ting a tether belt and air bag.
: In accordance with the first aspect of the present invention, in a structure for st~tching 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 stitc~ed portion laterally transverse 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 "eight"
comprising a first stitch and a second stitch laterally transverse the tether belt, and a third and a fourth seams that connect ends of the first and the second seams to 2~57~2 each other and obliquely transverse 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 transverse 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 illus-trating a structure for stitching a tether belt of an air 2Q~57~2 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 o-f a numerical ' 5 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 transverse 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 obli-quely transverse the tether belt 20A and both ends of the seams are present beyond the tether belt 20A. The third and the fourth seams 4~ 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 transverses the tether belt, if a tensile stress is applied to the tether belt 20A, a large stress : can be pr~vented from exerting locally on the tether belt 20A. Accordingly, a stitching strength required for the seam 40 can be reduced to facilitate stitching. In parti-cular, in this embodiment, each the first through fourth seams 41 - 44 completely transverses 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 2~57~
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 transverses 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.
.
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 stit-ching 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-l~nown, 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 predeter-mined sha~e.
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 lO is attached at a flanged portion 14 of an opening 12 to a container not illustrated by means of bolts or rivets. Then, when a gas from a inflator (not illustrated) is introduced passing through the opening 12 to the inside of the air bag 10, the air 2 ~ ~ 5 7 ~ ~
.
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 in 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 se~ms 31 and 32 are stitched only the central portion while leaving the lateral ends of the tether belt 20 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~ 7~2 20 are concentrated to the vicinity o~ the ends o-f 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.
t OBJECT AND SUMMARY OF THE INVENTION
An object of the present invention is to provide a simple and convenient structure capable of firmly connec-ting a tether belt and air bag.
: In accordance with the first aspect of the present invention, in a structure for st~tching 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 stitc~ed portion laterally transverse 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 "eight"
comprising a first stitch and a second stitch laterally transverse the tether belt, and a third and a fourth seams that connect ends of the first and the second seams to 2~57~2 each other and obliquely transverse 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 transverse 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 illus-trating a structure for stitching a tether belt of an air 2Q~57~2 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 o-f a numerical ' 5 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 transverse 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 obli-quely transverse the tether belt 20A and both ends of the seams are present beyond the tether belt 20A. The third and the fourth seams 4~ 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 transverses the tether belt, if a tensile stress is applied to the tether belt 20A, a large stress : can be pr~vented from exerting locally on the tether belt 20A. Accordingly, a stitching strength required for the seam 40 can be reduced to facilitate stitching. In parti-cular, in this embodiment, each the first through fourth seams 41 - 44 completely transverses 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 2~57~
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 transverses 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.
.
Claims (3)
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 transverses 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 first seam and a second seam laterally transverse 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 transverse the tether belt.
3. A structure as defined in claim 2, wherein each of the first through fourth seams is present also in the portion on the lateral sides of the tether belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-255 | 1992-01-06 | ||
| JP4000255A JPH05186961A (en) | 1992-01-06 | 1992-01-06 | Structure for sewing string on air bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2085702A1 true CA2085702A1 (en) | 1993-07-07 |
Family
ID=11468816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002085702A Abandoned CA2085702A1 (en) | 1992-01-06 | 1992-12-17 | 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9211864B2 (en) | 2012-01-24 | 2015-12-15 | Autoliv Asp, Inc. | Tether attachment arrangement for a vehicle airbag cushion and method of attaching |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0771694A2 (en) * | 1995-11-03 | 1997-05-07 | Morton International, Inc. | Airbag tether and attachment seam |
| DE29607302U1 (en) * | 1996-04-12 | 1996-07-04 | Petri Ag | Airbag module |
| US7625008B2 (en) * | 2005-10-17 | 2009-12-01 | Key Safety Systems, Inc. | Air bag with groove or recess, open or partially covered |
| 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 |
| US8657334B2 (en) | 2011-02-11 | 2014-02-25 | Key Safety Systems, Inc. | Airbag cushion |
| DE102014016124B4 (en) * | 2014-10-24 | 2021-05-06 | Autoliv Development Ab | Airbag device |
| JP6729496B2 (en) * | 2017-06-05 | 2020-07-22 | 豊田合成株式会社 | Side airbag device |
Family Cites Families (5)
| 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 |
| US4934734A (en) * | 1989-03-27 | 1990-06-19 | Juichiro Takada | Inflatable air bag for protection of a vehicle occupant |
| 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 |
-
1992
- 1992-01-06 JP JP4000255A patent/JPH05186961A/en active Pending
- 1992-11-14 KR KR1019920021452A patent/KR930016284A/en not_active Application Discontinuation
- 1992-12-17 CA CA002085702A patent/CA2085702A1/en not_active Abandoned
- 1992-12-21 GB GB9226595A patent/GB2262919B/en not_active Expired - Fee Related
-
1993
- 1993-01-05 DE DE4300125A patent/DE4300125C2/en not_active Expired - Lifetime
- 1993-01-05 FR FR9300023A patent/FR2685894A1/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9211864B2 (en) | 2012-01-24 | 2015-12-15 | Autoliv Asp, Inc. | Tether attachment arrangement for a vehicle airbag cushion and method of attaching |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2685894B1 (en) | 1994-12-02 |
| JPH05186961A (en) | 1993-07-27 |
| DE4300125C2 (en) | 1997-07-03 |
| GB2262919A (en) | 1993-07-07 |
| DE4300125A1 (en) | 1993-07-08 |
| KR930016284A (en) | 1993-08-26 |
| GB2262919B (en) | 1995-07-05 |
| GB9226595D0 (en) | 1993-02-17 |
| FR2685894A1 (en) | 1993-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |