WO1991018760A1 - Coussin pneumatique gonflable pour installation de securite anticollision - Google Patents
Coussin pneumatique gonflable pour installation de securite anticollision Download PDFInfo
- Publication number
- WO1991018760A1 WO1991018760A1 PCT/JP1990/000695 JP9000695W WO9118760A1 WO 1991018760 A1 WO1991018760 A1 WO 1991018760A1 JP 9000695 W JP9000695 W JP 9000695W WO 9118760 A1 WO9118760 A1 WO 9118760A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cloths
- air bag
- airbag
- base
- reinforcing cloth
- Prior art date
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
-
- 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
- B60R2021/23504—Inflatable members characterised by their material characterised by material
- B60R2021/23509—Fabric
- B60R2021/23514—Fabric coated fabric
-
- 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
- B60R2021/2359—Welding
Definitions
- the present invention relates to an airbag device for protecting an occupant by absorbing an impact generated at the time of a vehicle collision, and more particularly to an airbag device for receiving an occupant that is inflated and advances at the time of a vehicle collision.
- An airbag device has been developed as one of the devices.
- FIG. 8 shows an example of such a conventional airbag device.
- an airbag device 50 is provided, for example, at the center of a steering handle 51 arranged opposite to an occupant M in a driver's seat in an automobile.
- the gas quickly flows into the bag-shaped airbag 52 from an inflator (not shown) attached to the center of the steering handle 51 in the event of an emergency.
- the airbag 52 inflates as shown in FIG.
- the inflated airbag 52 receives the occupant M who is moving forward due to inertia, and the occupant M receives the steering air.
- the vehicle is prevented from colliding with a vehicle body such as $ 51.
- the airbag 52 used in this airbag device 50 is cut into two substantially circular pieces of woven cloth with rubber coating on the inside and sewn their outer peripheral edges to form a bag. Is formed.
- the airbag 52 is formed by sewing as described above, the sewing operation has to be performed manually, which takes time and effort.
- the airbag 52 is inflated, a large force is applied to the stitched portion, so that the strength must be increased by, for example, double sewing.
- heat-resistant material is applied to the seam to protect the sewing thread from the heat of high-temperature gas, and heat-resistant tape is applied to prevent air leakage due to the openings or seam holes in the seam. There must be. As a result, the number of work steps increases, and further labor is required.
- the hair bag will be quite bulky when folded.
- the sewing thread must be relatively thick to obtain strength, which makes it even bulkier.
- the package volume of the airbag increases.
- the airbag device 50 is to be disposed, for example, in the center of the steering handle 51, the center of the steering handle 51 is an extremely narrow space, and the package volume is thus reduced. If it is large, the airbag device 50 can be installed easily. Can not be. If the bulky hair bag device 50 is forcibly installed in the center of the steering handle 51, the driving operation is hindered, and the driving becomes difficult.
- the present invention has been made in view of such a problem, and an object of the present invention is to make it possible to reduce the package volume as much as possible and to make it difficult to manufacture.
- An object of the present invention is to provide an airbag in an airbag device.
- the present invention provides an airbag in which at least the inner side of two grave cloths is covered with rubber or thermoplastic resin, and the outer peripheral portions of these base cloths are thermally welded. I have. Then, a reinforcing cloth is disposed at the heat-welded portion, and the reinforcing cloth is heat-welded to both base cloths.
- An airbag device having such a configuration is provided.
- the outer peripheral portions of the two base fabrics are joined by heat welding. For this reason, there is no stitching part with sewing thread as in the case of the conventional sewing, so the joining part cannot be thickened.
- the package volume of the airbag is reduced, and the airbag is not so bulky when folded. Therefore, the airbag device is lightweight and compact, and the airbag device can be easily installed in places where the installation space is limited, such as the center of the steering wheel.
- the conventional sewing work that requires time and effort is eliminated. As a result, the production time and man-hour of the airbag are reduced, so that the productivity is improved and the airbag can be produced at a low cost.
- the joint between the two base cloths is reinforced by the reinforcing cloth, so that sufficient strength is secured. Therefore, even if the inflation gas flows in abruptly, the two base fabrics do not easily come off.
- the two base cloths and the reinforcing cloth are heat-welded, they can be joined simply by melting the resin at the joints by heat.
- the airtightness between the two base fabrics can be sufficiently ensured by welding, it is not necessary to take any special measures to prevent gas leakage. Therefore, the joining work does not require much work, and the workability is extremely good.
- FIG. 1 is a plan view of an embodiment of an airbag according to the present invention
- FIG. 2 is a sectional view taken along the line ⁇ — ⁇ in FIG. 1,
- Fig. 3 is an illustration of the force applied to the base fabric when the airbag is inflated
- Fig. 4 is a plan view of the reinforcing cloth used for this airbag.
- FIG. 5 is an explanatory view for explaining a method for manufacturing the reinforcing cloth
- FIG. 6 is an explanatory view for explaining another method for manufacturing the reinforcing cloth
- FIG. 7 is an explanatory diagram of a method of manufacturing an airbag
- FIG. 8 is an explanatory view of a conventional airbag device.
- the airbag 1 is formed in a bag shape from a front-side base cloth 2 and a rear-side base cloth 3.
- These base fabrics 2 and 3 can be formed from a resin such as polyester, nylon 6 or vinylon. In particular, in consideration of strength and flexibility, it is suitable to use nylon 66.
- At least the inner side of these base fabrics 2 and 3, that is, the surfaces facing each other, are coated or laminated with rubber-thermoplastic resin.
- the thermoplastic resin nylon-based or polyester-based resin is used.
- the base fabrics 2 and 3 are cut into a predetermined shape.
- the rear base fabric 3 is provided with a hole 4 into which an inflator of an airbag device (not shown) is fitted, and an inner peripheral end of the base fabric 3 forming the hole 4 is attached to the inflator. It has become possible to be. That is, the inner peripheral end of the base fabric 3 is inflated. 3a for mounting to the motor.
- a reinforcing cloth 5 is bonded to the outside of the base cloth 3 of the mounting part 3a, and a reinforcing cloth 6 is formed inside the base cloth 3 of the mounting part 3a. Are joined, and the reinforcing cloth 7 is joined to the base cloth 3 so as to cover the reinforcing cloth 6.
- These reinforcing cloths 5, 6, and 7 are formed of the same material as the base cloths 2 and 3, and at least the side opposite to the base cloth 3 is made of rubber or thermoplastic material similar to the base cloths 2 and 3. Coated or laminated with resin.
- the reinforcing cloths 5, 6, and 7 are joined to Jinbu 3 by heat welding. Holes of the same size as the hole 4 of the base fabric 3 are also formed in these reinforcing cloths 5, 6, and 7.
- two vent holes 8, 8 are formed through the base cloth 3 and the reinforcing cloth 7, and these vent holes 8 are formed in the airbag 1 when an occupant collides with the inflated airbag 1.
- the inflation gas is released slowly. As a result, when the occupant collides with the airbag 1, the impact is reduced.
- a band-like reinforcing cloth 9 is provided around the joint of the base cloths 2 and 3 over the entire circumference thereof, and is joined to the grave cloths 2 and 3 by heat welding.
- the reinforcing cloth 9 is preferably made of the same material as the base cloths 2 and 3 in consideration of the compatibility with the base cloths 2 and 3.
- the reinforcing cloth 9 is covered with the same rubber or thermoplastic resin covering material as the base cloths 2 and 3.
- a heat-resistant material such as a heat-resistant film having a high melting point, is attached to the surface not facing 3. This heat-resistant material can be omitted depending on the heat welding method.
- the reinforcing cloth 9 may have a strength sufficient to resist the force in the direction of arrow A applied to the joint when the airbag 1 is inflated. is necessary. For this reason, as apparent from FIG. 4, the strength of the reinforcing cloth 9 is reduced by mixing a large number of reinforcing threads 9a into the reinforcing cloth 9 in a direction substantially orthogonal to the longitudinal direction of the reinforcing cloth 9, for example. I am trying to raise it.
- a method of manufacturing the reinforcing cloth 9 is to wind a reinforcing thread 9a in a hose shape, attach a coating material on the inner and outer surfaces thereof, and then cross the reinforcing thread 9a at right angles. It is conceivable to cut and wind in the direction in which you want to cut.
- the airbag 1 is formed in a bag shape.
- two pieces of cloth in which rubber or a thermoplastic resin is coated or laminated in advance are cut into a predetermined shape.
- the reinforcing cloths 5, 6, 7 are heat-welded to predetermined positions on the inner and outer surfaces of the base cloth 3 on the rear side.
- a hole 4 into which the inflator is to be inserted is formed, and a vent hole 8 is formed.
- the base cloths 2 and 3 are overlapped so that the coated surface is on the inside, and the reinforcing cloth 9 is folded in two along the longitudinal direction at a predetermined position between the base cloths 2 and 3. Intervene.
- a welding jig 10 having substantially the same shape as the outer peripheral end portions of the base fabrics 2 and 3 is applied to the joint portion, and heat sealing, impulse sealing or high frequency sealing is performed. Apply heat.
- the heat melts the covering material of the base cloths 2 and 3 and the reinforcing cloth 9, and the peripheral ends of the base cloths 2 and 3 and the reinforcing cloth 9 are heat-welded respectively.
- the side of the reinforcing cloth 9 that is joined by the two folds is covered with a heat-resistant material, these surfaces cannot be welded to each other.
- a bag-shaped airbag 1 is formed.
- the reinforcing cloth 9 is heat-welded to the two base cloths 2 and 3, so that when a force is applied in the direction of arrow A in FIG. The force is received by the reinforcing cloth 9. Therefore, the strength of the joint between the base cloths 2 and 3 is determined by the width of the reinforcing cloth 9, that is, the joint area between the base cloths 2 and 3 and the reinforcing cloth 9. Thus, by appropriately setting the width of the reinforcing cloth 9, the strength of the joint can be increased. Table 1 shows the results of actual joint strength experiments (page 9).
- the strength of the joint is extremely high according to the method using heat welding. And this According to such heat welding, the strength of the joint is determined by the strength of the base cloth as in the case of conventional sewing, and only 40 to 50% of the strength of the base cloth can be obtained. Unlike this, even if the base fabrics 2 and 3 are thinned, the strength of the joint can be sufficiently ensured. Therefore, the airbags 1 are not so bulky even when folded, by thinning the thin cloths 2 and 3. Table 1 Various manufacturing methods
- the reinforcing yarn 9a of the reinforcing cloth 9 is assumed to be orthogonal to the longitudinal direction of the reinforcing cloth 9, but the present invention is not limited to this. It may be arranged so that the yarn is directed in any direction as appropriate. If sufficient strength can be ensured, such a reinforcing thread 9a can be omitted.
- the airbag in the airbag device of the present invention is applied to the field of being mounted on an automobile to protect an occupant by absorbing an impact generated during a vehicle collision.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1990/000695 WO1991018760A1 (fr) | 1990-05-30 | 1990-05-30 | Coussin pneumatique gonflable pour installation de securite anticollision |
EP19900908660 EP0485599A4 (en) | 1990-05-30 | 1990-05-30 | Air bag in air bag unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1990/000695 WO1991018760A1 (fr) | 1990-05-30 | 1990-05-30 | Coussin pneumatique gonflable pour installation de securite anticollision |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991018760A1 true WO1991018760A1 (fr) | 1991-12-12 |
Family
ID=13986551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1990/000695 WO1991018760A1 (fr) | 1990-05-30 | 1990-05-30 | Coussin pneumatique gonflable pour installation de securite anticollision |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0485599A4 (ja) |
WO (1) | WO1991018760A1 (ja) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340151A (en) * | 1991-11-25 | 1994-08-23 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Air bag apparatus |
US5447330A (en) * | 1992-10-30 | 1995-09-05 | Takata Corporation | Air bag having flameproof sheet protecting inflator and vent region |
US5538280A (en) * | 1994-09-30 | 1996-07-23 | Highland Industries, Inc. | Anti-ravel airbag fabric reinforcement |
US5630620A (en) * | 1994-09-01 | 1997-05-20 | Takata Corporation | Reinforced thermoplastic resin film air bag |
US5718966A (en) * | 1994-10-25 | 1998-02-17 | Highland Industries, Inc. | Release liner fabric having edge reinforcement |
US6113141A (en) * | 1998-07-06 | 2000-09-05 | American Components, Inc. | Roll-over air bag |
US6344251B1 (en) | 1988-12-01 | 2002-02-05 | Milliken & Company | Welded airbag structure |
US6364356B1 (en) | 1999-09-24 | 2002-04-02 | Milliken & Company | Airbag cushion comprising sewn reinforcement seams |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4233751C2 (de) * | 1992-10-07 | 1994-12-22 | Daimler Benz Ag | Insassenrückhaltesystem |
JPH07125592A (ja) * | 1993-11-05 | 1995-05-16 | Takata Kk | エアバッグ |
DE29607302U1 (de) * | 1996-04-12 | 1996-07-04 | Petri Ag | Airbagmodul |
US6355123B1 (en) * | 1998-07-06 | 2002-03-12 | Methode Electronics, Inc. | Roll-over air bag having a reinforced perimeter seal and associated method for producing a flat reinforced seal in a roll-over air bag |
FR2791625B1 (fr) * | 1999-03-30 | 2001-06-08 | Aerazur | Procede de realisation d'un sac de securite gonflable, et sac obtenu par la mise-en-oeuvre de ce procede |
EP1963143B1 (en) * | 2005-12-12 | 2013-11-27 | Highland Industries, Inc. | Thermoplastic coated, heat-sealed airbag |
JP4992785B2 (ja) * | 2008-03-24 | 2012-08-08 | 豊田合成株式会社 | エアバッグ |
DE102012019945B4 (de) * | 2011-10-13 | 2017-11-16 | Autoliv Development Ab | Gassackeinheit mit einem eine Randnaht abdeckenden Abdeckband |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4849139A (ja) * | 1971-10-22 | 1973-07-11 | ||
JPS50137735U (ja) * | 1974-04-30 | 1975-11-13 | ||
JPS6334751U (ja) * | 1986-08-26 | 1988-03-05 | ||
JPS6441439A (en) * | 1987-08-06 | 1989-02-13 | Asahi Chemical Ind | Manufacture of basic cloth for air bag |
JPH01122751A (ja) * | 1987-11-05 | 1989-05-16 | Asahi Chem Ind Co Ltd | 自動車用エアバツグ |
JPH01122754A (ja) * | 1987-11-05 | 1989-05-16 | Sekisui Chem Co Ltd | エアバッグ収納ケース |
JPH02114035A (ja) * | 1988-10-24 | 1990-04-26 | Toray Ind Inc | 車両用エアバッグ基布 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2552815A1 (de) * | 1975-11-25 | 1977-05-26 | Phoenix Gummiwerke Ag | Aufblasbarer prallschutzbalg fuer den fahrgastraum von kraftfahrzeugen |
-
1990
- 1990-05-30 EP EP19900908660 patent/EP0485599A4/en not_active Withdrawn
- 1990-05-30 WO PCT/JP1990/000695 patent/WO1991018760A1/ja not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4849139A (ja) * | 1971-10-22 | 1973-07-11 | ||
JPS50137735U (ja) * | 1974-04-30 | 1975-11-13 | ||
JPS6334751U (ja) * | 1986-08-26 | 1988-03-05 | ||
JPS6441439A (en) * | 1987-08-06 | 1989-02-13 | Asahi Chemical Ind | Manufacture of basic cloth for air bag |
JPH01122751A (ja) * | 1987-11-05 | 1989-05-16 | Asahi Chem Ind Co Ltd | 自動車用エアバツグ |
JPH01122754A (ja) * | 1987-11-05 | 1989-05-16 | Sekisui Chem Co Ltd | エアバッグ収納ケース |
JPH02114035A (ja) * | 1988-10-24 | 1990-04-26 | Toray Ind Inc | 車両用エアバッグ基布 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0485599A4 * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6344251B1 (en) | 1988-12-01 | 2002-02-05 | Milliken & Company | Welded airbag structure |
US5340151A (en) * | 1991-11-25 | 1994-08-23 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Air bag apparatus |
US5447330A (en) * | 1992-10-30 | 1995-09-05 | Takata Corporation | Air bag having flameproof sheet protecting inflator and vent region |
US5630620A (en) * | 1994-09-01 | 1997-05-20 | Takata Corporation | Reinforced thermoplastic resin film air bag |
US5538280A (en) * | 1994-09-30 | 1996-07-23 | Highland Industries, Inc. | Anti-ravel airbag fabric reinforcement |
US5718966A (en) * | 1994-10-25 | 1998-02-17 | Highland Industries, Inc. | Release liner fabric having edge reinforcement |
US6113141A (en) * | 1998-07-06 | 2000-09-05 | American Components, Inc. | Roll-over air bag |
US6364356B1 (en) | 1999-09-24 | 2002-04-02 | Milliken & Company | Airbag cushion comprising sewn reinforcement seams |
Also Published As
Publication number | Publication date |
---|---|
EP0485599A4 (en) | 1992-12-02 |
EP0485599A1 (en) | 1992-05-20 |
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