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WO2008101763A1 - Sac à gaz pour un véhicule automobile, et procédé de fabrication du sac à gaz - Google Patents

Sac à gaz pour un véhicule automobile, et procédé de fabrication du sac à gaz Download PDF

Info

Publication number
WO2008101763A1
WO2008101763A1 PCT/EP2008/050942 EP2008050942W WO2008101763A1 WO 2008101763 A1 WO2008101763 A1 WO 2008101763A1 EP 2008050942 W EP2008050942 W EP 2008050942W WO 2008101763 A1 WO2008101763 A1 WO 2008101763A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
airbag
folded state
folded
rolled
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.)
Ceased
Application number
PCT/EP2008/050942
Other languages
German (de)
English (en)
Inventor
Heinrich Einsiedel
Jürgen Völk
Peter Baumgartner
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 Petri AG
Original Assignee
Takata Petri AG
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 Petri AG filed Critical Takata Petri AG
Publication of WO2008101763A1 publication Critical patent/WO2008101763A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B60R21/237—Inflatable members characterised by the way they are folded
    • 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
    • B60R21/232—Curtain-type airbags deploying mainly in a vertical direction from their top edge

Definitions

  • the invention relates to an airbag for a motor vehicle according to the preamble of claim 1 and to a method for producing an airbag.
  • Such an airbag is inflatable for the protection of a person in or on a motor vehicle and has an airbag cover which surrounds a gas-filled interior of the airbag, wherein the airbag cover has a first portion and a second portion connected to the first portion, in front of the Inflation of the airbag are each arranged in a folded state, wherein the second portion is rolled up in its folded state at least in sections to the first portion.
  • an airbag is known from EP 1 591 323 A1.
  • the invention has for its object to provide a gas bag with an advantageous deployment behavior and a method for producing such a gas bag.
  • a gas bag having the feature of claim 1. Thereafter, it is provided that the first section of the airbag, which in particular forms a filling region of the airbag, via which the airbag can be filled with gas, is folded into a chaotically folded airbag package.
  • the second section is at least partially wound in the direction of the first section in such a way that the second section orbits an outer edge section of the second section at least once, in particular several times.
  • an airbag in the form of a head-end gas bag which extends from a roof spar substantially along the vertical axis of the vehicle between one Protective person and a side vehicle body (especially in front of the side windows) is deployed, it is at that outer edge portion - based on a built-in a motor vehicle according to the intended and unfolded state of the airbag - to a lower edge portion of the airbag.
  • the gas bag may also be a door or seat-integrated side airbag or overhead gasbag, that is, the airbag is installed in a seat or a door of the motor vehicle.
  • a seat-integrated side airbag can be arranged, for example, in the folded state in or on a side body region of the motor vehicle facing part of a seat back, which forms a contact surface for the upper body (back) of a seat occupied occupant occupant. Accordingly, the outer edge portion of the first portion of the deployed airbag extends along the seat back, wherein the airbag over the first portion may be fixed to the seat (backrest).
  • the first section is adjoined along the vehicle longitudinal axis by the second section of the (deployed) airbag, which in the folded state is at least partially rolled up to the first section, that is to say to the seat or seat back.
  • the outer edge portion of the first portion may be a lower edge portion, wherein the side airbag is deployed upwardly along the vertical vehicle axis to extend in front of the side body portion, ie, at the outer edge portion of the second portion of the airbag it is in this case an upper edge portion of the unfolded airbag.
  • the first section which is first deployed upon inflation of the airbag, and thus the second (still folded) portion of the airbag along a main deployment direction, which has a component along the vertical vehicle axis in a gas bag in the form of a Kopfjangassackes, toward the occupant to be protected displaced by its chaotic folding the second portion of the airbag relatively quickly from the filling area (first section) of the airbag space.
  • the chaotic folding is particularly easy to perform and can be generated by a Georgiaraffen the first section.
  • a chaotic folding is understood to be a folding whose folds have no preferred direction.
  • the first and second sections in the folded state of the gas bag each correspondingly longitudinally extending, closely spaced packages, the chaotically folded first section along its longitudinal direction has a changing, irregular cross-sectional image (wrinkle).
  • This is in contrast to a regular zig-zag folding, in which the individual folds all run parallel to one another along the longitudinal extension direction (rectilinear).
  • the first and second sections preferably form a coherent, compact airbag package which extends along a roof rail in the case of an airbag in the form of a head-end gas bag, the first section of the airbag preferably including a receptacle for a part of an inflator of the gas bag forms.
  • the gas bag folded into an airbag package may extend along the said seat back prior to inflation.
  • the airbag folded into an airbag package may extend along a door edge (door parapet) prior to inflation, which runs along a vehicle's longitudinal axis below a door window, relative to the vertical vehicle axis.
  • the said part of the gas generator can be a gas pipe connected to the gas filling tube for the gas bag, a diffuser or the gas generator itself.
  • the filling tube or the diffuser can also be integral components of the airbag and be made of a gas bag material.
  • the airbag folded to form the airbag package can be fixed via that part to a motor vehicle part, in particular a roof spar or a corresponding fairing.
  • the gas bag is set up and provided, in a deployed (inflated) state to protect a person like a curtain in the interior of a Motor vehicle to extend in front of a side vehicle body, especially in front of the side windows of the side body.
  • the gas bag In the unfolded state, the gas bag has an outer side facing the side of the motor vehicle body and an inner side facing the interior of the motor vehicle, which forms an impact surface for the occupant to be protected.
  • the second section is at least partially rolled up in such a way towards the first section that the inside of the airbag forms an outwardly facing outer surface of the folded second section.
  • the second section is at least partially rolled up to the first section in such a way that the second section rolls in the direction of the lateral body region (lateral motor vehicle body) when it encounters an obstacle, in particular a head, during unfolding of the airbag along a main deployment direction or a side of the body facing shoulder portion of the person to be protected hits. This ensures that the gas bag always unfolds between the person to be protected and that side body.
  • the individual, circumferential segments of the folded (rolled) second section of the airbag are rectangular in cross-section.
  • Such a cross-sectional shape of the second section of the airbag folded into a package can be produced, for example, by means of a roll core which is rectangular in cross-section and around which the second section is rolled up.
  • the first section in the folded state of the airbag surrounds the second section at least in sections in cross section.
  • a part of the first section is preferably arranged between the second (folded) section and a motor vehicle part, for example a roof rail, so that the second section is pushed away from that motor vehicle part when the airbag is inflated by the first section.
  • a roof spar thus the second portion is displaced by the inflating first portion in the direction of the interior of the motor vehicle.
  • the second section has a first section adjacent to the lower (outer) edge section and one the first section with the first section connecting the second section.
  • the first section is preferably rolled up toward the first section, so that the first section is wound around the lower edge section of the second section of the airbag at least once in the folded state of the second section.
  • the first section rotates several times that edge section.
  • the first section in the folded state of the second section is regularly folded in a zig-zag shape, so that the rectilinear, strip-shaped segments of the first section lie one above the other.
  • the first section is folded chaotically in the folded state of the second section.
  • the second section of the second section surrounds the first section of the second section in cross-section.
  • the second section in the folded state of the second section, the second section is rolled up in the direction of the first section, so that the second section circulates the first section at least once, preferably several times in cross-section, that is, around the first section.
  • the two sections are preferably rolled in opposite directions.
  • the second, outer partial section can be wound in such a way that the second partial section rolls off the lateral body region towards the interior when the airbag is inflated.
  • the second subsection can overcome obstacles projecting beyond the lateral body region into the interior of the motor vehicle (for example, belt guiding elements in the form of shoulder deflection elements).
  • the first part section is rolled up in the opposite direction to the second part section, so that that part section is oriented towards the body region during deployment and is therefore always positioned between the occupant and the lateral body region.
  • Gas bag in the form of a head gas bag - based on a purpose built into a motor vehicle and unfolded state of the airbag - along the vertical axis of the vehicle has a length such that the not yet unfolded second section of the airbag is arranged at an unfolded first portion of the airbag approximately at the height of a head of a person to be protected, occupying a vehicle seat adjacent to the side of the vehicle body area as intended.
  • the object according to the invention is achieved by a method for producing a gas bag according to the invention having the features of claim 22. After that it is planned:
  • the second section is rolled up (wound up) in particular in such a way to the first section that the second section is wound at least once around an outer edge section of the second section.
  • it may be at that edge portion - based on a built-in a motor vehicle and unfolded state of the airbag - for example, a lower or upper edge portion of the airbag.
  • the edge section may also be a front edge section with respect to the vehicle's longitudinal axis (eg in the case of a seat-integrated side airbag).
  • the second section is tightly wound around the first section by means of a two-part roller core in the form of two longitudinally extending elements.
  • the two longitudinally extending elements are arranged on both sides of the flat extended second portion so that it can be clamped by means of the two elements.
  • This allows the second section to be rolled up around the roll core, biasing the second section against the roll core (ie, the two elements) so that the second section can be tightly rolled up (small diameter of the resulting package).
  • the folded second section is displaced by means of the two elements in the direction of the (still) flat-spread first section, which is preferably supported on a suitable abutment (stop) via an edge section of the first section.
  • the first section is chaotically folded and a compact airbag package is created with closely adjacent first and second sections.
  • the roller core that is, the two longitudinally extending elements
  • the roller core that is to say the two longitudinally extending elements for rolling up the second section are arranged at a distance from the outer edge section of the second section or clamp the second section at a distance from that edge section.
  • an outer peripheral portion having a convex or concave curvature in the plane of extent of the flatly extended second portion
  • the lower edge portion can be turned over in particular, wherein the folded portion of the second portion can be rolled with.
  • FIG. 1A - 1D a folding process of a gas bag according to the invention
  • Fig. 1 E is a perspective view of a folded according to the method shown in Figures 1A - 1 D to a longitudinally extended airbag package
  • Airbag with three exemplary cross-sectional views of the folded airbag
  • FIG. 2 shows a modification of the method shown in FIGS. 1A to 1D;
  • Fig. 3 is a schematic sectional view of a method according to the
  • FIGS. 1A to 1D or 2 folded airbag are identical to FIGS. 1A to 1D or 2 folded airbag.
  • 4A-4E are schematic cross-sectional views of different variants of gas bags according to the invention.
  • FIGS. 1A to 1 D show a method for producing (folding) an airbag G in the form of a top gas bag, with an airbag cover H which, based on a flat spread state shown in FIG. 1A, is composed of at least two superposed airbag parts , which are circumferentially connected to each other to form the airbag cover H, wherein the two airbag parts can be partially connected in one piece with each other.
  • the gas bag G is designed to be deployed in front of a lateral vehicle body K for the protection of an occupant, wherein the airbag H in a unfolded (inflated) state of the airbag G from the interior I of the motor vehicle forth in front of the windows, in particular door windows, of the side Body section K (lateral vehicle body) extends and these preferably covered.
  • the airbag G In a folded state, ie, prior to inflation, the airbag G is folded into a longitudinally extending airbag package, wherein the airbag G is adapted to be attached to a roof rail along running in the motor vehicle, so that it in case of activation for Protection of a vehicle occupant from crash-related forces starting from said roof rail along the vertical vehicle axis z unfold before the side windows of the lateral body area K.
  • the airbag G along a roof pillar are from a - related to a built and unfolded state of the airbag G - upper edge portion R of the airbag G or the airbag hull H attachment areas 40 of the airbag G from, on the gas bag G on the motor vehicle (eg Roof rail) can be fastened.
  • the gas bag G is inflated over the first section A.
  • the first section A forms for this purpose a receptacle for a longitudinally along the upper edge portion R to be arranged gas generator or alternatively a receptacle for communicating with a gas generator filling tube (possibly with a diffuser), which is for introducing gas into the gas bag, ie in an area surrounded by the airbag envelope H Innraum serves.
  • the first, chaotically folded section A of the airbag cover H unfolds during filling of the airbag G with gas before a second section A 'adjoining the first section A against the vertical vehicle axis z can unfold, such that the deploying first section A positions the second section A 'in a folded state in the interior I of the motor vehicle.
  • the gas bag envelope H has an outer side 10 facing the lateral body region K and an inner side 15 facing away from the outer side 10, which can form an impact surface for the occupant to be protected.
  • the second section A ' is rolled up in its folded state at least in sections to the first section A.
  • the rolled-up second section A 'of the airbag envelope H can also have a rectangular cross-section perpendicular to the longitudinal direction of the folded airbag package (see FIG. 4D), ie the rolled-up second section A' does not necessarily have the shape of a (round) roll.
  • the second section A Depending on which winding direction the second section A 'has, it moves when hitting an obstacle to the side body region K, which is associated with the gas bag G, toward or away from it.
  • the second section A ' is subdivided into a first partial section 20 extending along the vehicle longitudinal axis x, which adjoins the lower peripheral section R', and a second, likewise along the vehicle longitudinal axis x Part 25, which connects the first section 20 with the first section A.
  • the last unfolding first section 20 is now preferably wound so that it rolls to the side body region K out when he encounters an obstacle, usually an inmate to be protected.
  • the first section 20 and thus the gas bag G is automatically positioned between that occupant and the lateral body region K.
  • the second, outer section 25 of the second section A ' which surrounds (rotates) the first section 20 in the folded state of the second section A', on the other hand, is rolled up in the other direction, so that when it encounters an obstacle, for example on one of the lateral body region K projecting belt guide element, can roll to the interior I out.
  • the gas bag G before being positioned between the occupant and the side body portion K, obstacles overcome, which protrude from the body region K overcome.
  • the (outer) second partial section 25 runs around the first section A in a clockwise direction and the (inner) first section 20 of the second section A 'circulates counterclockwise from the first section A.
  • the winding directions of the two sections 20, 25 can of course be reversed.
  • the second subsection 25 rotates counterclockwise in FIG. 4A coming from the first section A, while the first subsection 20 circulates clockwise from the first section A.
  • the second section 25 serves for positioning the second section A 'first between the occupant and the lateral body region K, wherein after positioning of the opposite winding sense of the last unfolding first section 20 prevents the unfolding gas bag G to projections of the lateral body region K is set approximately at the height of the upper body of the occupant to be protected.
  • first portion 20 surrounding the second portion 25 may be chaotically folded as well as the first portion (see Fig. 4C).
  • the gas bag G is first spread flat with its later outer side 10 pointing upwards on a flat base.
  • two longitudinally extended elements are arranged on both sides of the second section A 'of the flat-spread airbag G, so that said second section A' is clamped between the two elements 30, 35.
  • one of the two elements 30 bears against the outside 10 of the airbag envelope H and the other element 35 on the inside 15.
  • the two elements 30, 35 are further arranged such that they lie close to each other with the interposition of the second section A 'and parallel to each other along the lower (outer) edge portion R' of the second section A 'of the airbag envelope H. In this case, the two elements 30, 35 may be aligned parallel to the upper (outer) edge portion R of the first section A.
  • the two elements 30, 35 In order that the second section A 'can be easily wound onto the first section A on the two elements 30, 35, the two elements 30, 35 in their initial position along a transverse to the upper edge portion R oriented (in the plane of the airbag cover H lying Direction additional to the lower edge portion R 'of the second portion A' of the airbag cover H, to compensate for a curvature of that lower edge portion R ', ie to provide a rectilinear lower edge of the airbag cover H for winding up the second portion A' ( see Fig. 1A).
  • the second portion A ' is rolled up by rotating the two abutting members 30, 35 about their longitudinal axis to the first portion A.
  • a lower subarea which adjoins the lower edge section R ' is folded over and rolled up so that a straight edge of the second section A' of the airbag G rolled up in sections results (compare FIG. 1 B).
  • the rolled-up second section A' is displaced by means of the roller core 30, 35 towards the upper edge section R, which adjoins a stop abuts suitably so that the first section A is gathered chaotically, ie, the first section A has along its longitudinal direction (along the vehicle longitudinal axis x) in cross-section to a non-uniform wrinkle image, as exemplified in Figure 1 E is shown.
  • That airbag package can be surrounded by a narrow envelope or comparable elements which hold together the airbag package and release the airbag package during inflation.
  • the two elements 30, 35 along the longitudinal direction of the airbag package are pulled out of this.
  • Figure 2 shows an alternative variant of the method in which the gas bag G is rolled up hanging.
  • the gas bag G can be fixed via a filling tube or the like arranged in the first section A.
  • the rolling up of the second section A ' is also possible without roll core or, as indicated in Figure 2, with a circular cross-section, one-piece roll core.
  • the first section A is chaotically folded by shirring after the second section A 'has been rolled up, so that a longitudinally extended airbag packet with the cross section shown schematically in FIG. 3 is produced.
  • the second section A ' due to the roll folding, predominantly a roundish cross section, while the cross section of the first section A of the airbag G due to the gathering assumes a rather rectangular shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un sac à gaz pour un véhicule automobile, qui peut être gonflé dans ou sur un véhicule automobile afin de protéger une personne, avec : une enveloppe (H) de sac à gaz, qui entoure un espace intérieur du sac à gaz (G) pouvant être rempli de gaz ; au moins une première partie (A) et une deuxième partie (A'), reliée à la première partie (A), de l'enveloppe de sac à gaz, qui sont respectivement disposées dans un état replié avant le gonflage du sac à gaz (G). Dans son état replié, la deuxième partie (A') est enroulée au moins partiellement en direction de la première partie (A). Selon l'invention, la première partie (A) est, dans son état replié, repliée de façon chaotique.
PCT/EP2008/050942 2007-02-22 2008-01-28 Sac à gaz pour un véhicule automobile, et procédé de fabrication du sac à gaz Ceased WO2008101763A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200720003212 DE202007003212U1 (de) 2007-02-22 2007-02-22 Gassack für ein Kraftfahrzeug
DE202007003212.9 2007-02-22

Publications (1)

Publication Number Publication Date
WO2008101763A1 true WO2008101763A1 (fr) 2008-08-28

Family

ID=38320294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/050942 Ceased WO2008101763A1 (fr) 2007-02-22 2008-01-28 Sac à gaz pour un véhicule automobile, et procédé de fabrication du sac à gaz

Country Status (2)

Country Link
DE (1) DE202007003212U1 (fr)
WO (1) WO2008101763A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115214520A (zh) * 2021-04-19 2022-10-21 丰田纺织株式会社 车辆安全气囊卷起装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010010393A1 (de) * 2010-03-05 2011-09-08 GM Global Technology Operations LLC , (n. d. Ges. d. Staates Delaware) Airbaganordnung für ein Kraftfahrzeug
DE102010051796A1 (de) * 2010-11-18 2012-05-24 GM Global Technology Operations LLC Airbag mit gepacktem Luftsack und Verfahren zum Packen eines Luftsackes
DE112014001992B4 (de) * 2013-04-16 2017-08-17 Tk Holdings Inc. Airbagvorrichtung
CN108437926B (zh) * 2017-02-16 2022-02-18 奥托立夫开发公司 用于将气帘卷绕和/或折叠成管状体的包装方法
KR102676350B1 (ko) 2021-05-24 2024-06-17 현대모비스 주식회사 보행자에어백 쿠션

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE19940776A1 (de) * 1999-08-27 2001-03-01 Delphi Tech Inc Luftsackmodul
DE10054910A1 (de) * 2000-11-06 2002-09-26 Delphi Tech Inc Verfahren und Vorrichtung zum Falten eines Gassacks
US20050110256A1 (en) * 2003-11-25 2005-05-26 Crookston Jesse R. Method for folding an occupant protection device
EP1591323A1 (fr) * 2004-04-28 2005-11-02 Takata Corporation Système de sac gonflable

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19940776A1 (de) * 1999-08-27 2001-03-01 Delphi Tech Inc Luftsackmodul
DE10054910A1 (de) * 2000-11-06 2002-09-26 Delphi Tech Inc Verfahren und Vorrichtung zum Falten eines Gassacks
US20050110256A1 (en) * 2003-11-25 2005-05-26 Crookston Jesse R. Method for folding an occupant protection device
EP1591323A1 (fr) * 2004-04-28 2005-11-02 Takata Corporation Système de sac gonflable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115214520A (zh) * 2021-04-19 2022-10-21 丰田纺织株式会社 车辆安全气囊卷起装置
CN115214520B (zh) * 2021-04-19 2023-11-10 丰田纺织株式会社 车辆安全气囊卷起装置

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