EP0655094A1 - Corps textile creux et son procede de fabrication - Google Patents

Corps textile creux et son procede de fabrication

Info

Publication number
EP0655094A1
EP0655094A1 EP94908183A EP94908183A EP0655094A1 EP 0655094 A1 EP0655094 A1 EP 0655094A1 EP 94908183 A EP94908183 A EP 94908183A EP 94908183 A EP94908183 A EP 94908183A EP 0655094 A1 EP0655094 A1 EP 0655094A1
Authority
EP
European Patent Office
Prior art keywords
layer
layers
common
hollow body
woven
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.)
Withdrawn
Application number
EP94908183A
Other languages
German (de)
English (en)
Inventor
Johann Berger
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19924226954 external-priority patent/DE4226954A1/de
Priority claimed from DE4324487A external-priority patent/DE4324487B4/de
Application filed by Individual filed Critical Individual
Publication of EP0655094A1 publication Critical patent/EP0655094A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/04—Sack- or bag-like articles
    • 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D11/00—Double or multi-ply fabrics not otherwise provided for
    • D03D11/02—Fabrics formed with pockets, tubes, loops, folds, tucks or flaps

Definitions

  • the invention relates generally to the manufacture of textile hollow bodies (hereinafter simply called “hollow bodies”), in particular of airbags for vehicle occupants, but also of backpacks, bags, seat covers, clothing, in particular pants.
  • hollow bodies hereinafter simply called “hollow bodies”
  • Airbags of this type are suitable for attachment to steering wheels, but not for attachment on the passenger side. There, the airbags must have considerably more volume in order to fill a deep space between the passenger on the one hand and the dashboard on the other. The same applies to the rooms in front of the rear seats.
  • the present invention is intended to create a hollow textile body, in particular an airbag designed as a hollow body. After being inflated, such an airbag is suitable for filling a relatively large space.
  • the present invention provides a textile hollow body and a method for its production, by means of which all or almost all sewing processes can be avoided.
  • a sack-like airbag can be achieved according to the invention by interweaving gussets, that is, parts of fabric whose edges are interwoven with the upper and lower outer layers and which protrude inwards between the two outer fabric layers (outer layers). So there are four superimposed fabric layers.
  • the two gusset layers of at least one gusset are woven together at their edges pointing towards the center of the hollow body (Irmenrändem). You then save a sewing process at this point. To produce an airbag, the inner edges of the other gusset in particular are woven together. In this case, you save more sewing processes.
  • the result is a multi-layer fabric web that has four layers in the area of the gusset, three layers between the two gussets and two layers outside the gusset. A middle common position results between the two gussets.
  • warp threads in S and Z twists can alternate. When using untwisted warp threads, it is then no longer necessary to apply a size and to wash it out later. Costs are saved and the environment is protected. Tension compensation in the tissue is achieved more precisely.
  • weaving errors can be visually recognized.
  • colored identification threads provide an orientation for later manufacturing processes.
  • the invention further relates to a method for producing a hollow textile body, of the type mentioned above, using a weaving machine with a jacquard or equivalent device.
  • Four sets of warp threads are provided for the different layers of the hollow body to be woven, namely the upper and lower outer layer, the upper and lower gusset layer and the middle common layer.
  • the associated warp threads are controlled in such a way that an upper common layer is woven outward from the edges instead of the upper outer layer and the upper gusset layers, which binds the two together.
  • the upper and lower gusset layers of at least one gusset merge into the middle common position.
  • the central common position viewed from the inner edge of one or both gussets, can only have the width (each) of an edge strip running in the longitudinal direction of the web.
  • the upper and the lower common layer can merge into one overall layer.
  • the two total layers will be cut off later. In the manufacturing process, however, they lead to a stable structure which can also be handled well before being fixed.
  • a further development of the method relates specifically to the manufacture of an airbag. Accordingly, the widths of the upper and lower common layers (viewed in plan view) change in such a way that parts of the two outer layers that are not woven together are located, the interior of the airbag being delimited by an outline. An opening is then cut into one outer layer, which later serves as a generator mouth. The textile hollow bodies are now separated. The middle common layer is cut through between the inner edges of the gusset (in the longitudinal direction of the web). Then the individual hollow bodies are turned inside out, in particular through the opening. In other cases, where one gusset is open, it is easier to turn inside out.
  • the textile structure created by weaving can be equipped, in particular fixed. Before the everting, the upper and the one under the common layer can be cut off beyond an edge strip of a width sufficient for cohesion. It is thereby achieved that the edge strips still remaining from the upper and lower common layers now protrude into the interior of the hollow body, ie do not interfere with the outside. Only the marginal strips remaining from the middle common position protrude outwards.
  • An airbag can, however, always be arranged in such a way that these two outwardly protruding edge strips do not interfere in the event of use, that is to say do not come into contact with the face of the occupant.
  • hollow body parts in particular for airbags, can be placed next to one another in a fabric web such that only very small waste areas remain.
  • hollow bodies can be arranged next to one another in the web transverse direction.
  • wide and narrow hollow body parts can alternate both above and below.
  • the narrow and wide hollow bodies can be arranged offset with respect to one another.
  • Figure 1 shows in perspective an inflated airbag according to the invention.
  • Figure 2 is a top view of a multi-ply fabric web with woven airbags.
  • Figure 3 is a simplified cross section along line VII-VII through the individual layers of this fabric web.
  • Figure 4 is an enlarged section transverse to the warp threads at one of the transition points from two individual layers into a common position.
  • FIGS. 5 and 6 are side views of warp thread sheets, forming one compartment each from the upper sheet and from the two upper sheets.
  • FIG. 7 shows in cross section a multi-layer fabric web for the production of an airbag.
  • FIG. 8 shows the same fabric web in perspective, but after cutting off edge regions.
  • FIG. 9 shows an airbag cut out of the fabric web according to FIG. 8 and turned inside out in cross section.
  • FIG. 10 shows an asymmetrical, inflated airbag in perspective.
  • FIG. 11 is a cross section in the plane XIV-XIV of the following FIGS. 12 and 13, but only shows this section plane.
  • FIGS. 12 and 13 show a top view of the upper and lower side of a fabric web, in which several hollow bodies are accommodated side by side.
  • FIG. 14 shows in perspective an airbag of a different shape, which can be produced from a four-layer or a six-layer fabric.
  • FIG. 15 shows a four-layer fabric web in cross section.
  • Figure 16 shows in perspective the woven, not yet inflated airbag.
  • FIG. 17 shows a six-layer fabric web in cross section.
  • FIG. 18 shows the airbag produced after that, not yet inflated.
  • Embodiments of the invention are described below with reference to the manufacture of an airbag. However, essential parts of the invention can also be applied to the production of other hollow textile articles, without this being mentioned in detail below.
  • FIG. 1 shows in perspective an inflated airbag 1 intended for the front passenger in its position of use. It has an upper side, which is referred to below as the upper outer layer 14, corresponding to a lower outer layer 15. Its outer wall, shown on the left in FIG. 1, which corresponds to one of the gussets 4 described below, is turned towards the passenger's chest while the head is turned of the passenger in an emergency hits the upper outer layer 14.
  • an opening 12 is provided as a generator mouth, that is to say an opening through which the gas generator, when not in use, conveys the gas into the interior of the hollow body.
  • the weaving machine to be used is preferably equipped with a jacquard device.
  • This preferably has an electronic single thread control.
  • the warp threads hang individually on a strand, so that all warp threads can be controlled electronically separately.
  • FIG. 2 shows a top view of a multi-layer fabric web 13 with woven-in airbags 1.
  • the double arrow K denotes the direction of the warp thread.
  • the double arrow R denotes the length of a repeat.
  • FIG. 3 shows the multi-layer fabric web in cross-section along line III-III in FIG. 2.
  • the side walls are formed by an upper outer layer 14 and a lower outer layer 15. Both are woven together by two gussets 4. Both gussets have an upper gusset layer 17 and a lower gusset layer 18 (see also Fig. 1).
  • the upper outer layer 14 is woven on the right and left with the upper gusset layers 17 to form a common upper layer 20, as are the lower gusset layers 18 with the lower outer layer 15 each of a lower common layer 21.
  • All four gusset layers 17 and 18 are woven with a middle common layer 26.
  • the upper and lower common layers 20, 21 can be woven together to form an overall layer 30, as is shown only on the left in FIGS. 2 and 3. (More on this will be described later in connection with FIG. 7.) These overall layers are later cut away, but have advantages during manufacture by keeping the upper and lower common layers 20, 21 aligned with one another, at least for as long as this until the textile structure has been fixed.
  • FIG. 4 shows, in cross section to the warp threads, one of several possible variants of the principle known per se of weaving two individual layers into a common layer.
  • the right part of FIG. 4 shows how the two fabric layers are woven together.
  • the weft threads encompass two warp threads 23, 24 on the right, and a common layer is thus formed on the right.
  • the representation according to FIG. 4 corresponds to the positions in FIG. 3 at the top right and bottom right in the position shown.
  • FIG. 5 and 6 show a side view of four sets of warp threads one above the other.
  • the warp threads can be led into the weaving machine from warp beams or from loops.
  • An uppermost sheet 31 serves to weave the upper outer layer 14 (FIG. 3). Compartments 31 'are formed from it.
  • a sheet 32 located below the sheet 31 serves inter alia for weaving the upper gusset layers 17, for which purpose compartments 31.2 'are formed together from the upper sheet 31 and the sheet 32.
  • the upper edge portion 20 becomes common woven by the coulters 31 and 32, the lower edge section 21 by the coulters 33 and 34.
  • the middle common layer 26 is woven together by the coulters 32 and 33. Further explanations are not necessary since the like is known in weaving with jacquard devices.
  • FIG. 7 shows in cross section the original fabric, similar to FIG. 3, but the upper outer layer 14 is narrower than the lower outer layer 15.
  • Overall layers 30 are provided on both edges. In layers 20, 21 and 30, the warp threads are thinned out, i.e., less warp threads are used per cm machine width than for the fabric parts.
  • This structure is first equipped, in particular fixed. Then the two upper and the two lower common layers 20 and 21 are cut apart from one edge strip 20 ', 21', which has a width sufficient for cohesion.
  • the upper outer layer 14 an opening 12 is then created for a generator mouth. Two longitudinal cuts 35 are produced through this opening in the central common position 26 with a cutting device, whereby the central common position is interrupted and only one edge strip 26 'of this remains on both sides.
  • the upper and lower common layers 20, 21 are cut along cut edges 22, in such a way that only one edge strip 20 ', 21' remains outside the outline 6 of the airbag.
  • the hollow bodies are then separated by cuts at right angles to the longitudinal direction of the web.
  • the individual hollow bodies are then turned inside out through the opening 12 by a suction device.
  • the result is structures as shown in FIG. 9 in cross section.
  • the edge strips 20 'and 21' now point inwards, while the two edge strips 26 'initially directed inwards point outwards.
  • FIG. 10 shows another embodiment of an inflated airbag 40. It is shown rotated by 180 ° with respect to the representations according to FIGS. 1, 7 and 8, so that its upper outer layer 14 is now at the bottom.
  • the "lower" gusset layer 18 which is now on top is wider than the gusset layer 17, as is also shown in FIGS. 7 and 8.
  • the airbag is woven from synthetic threads with a thickness of 235 to 940 dtex.
  • Different bindings for different parts of the airbag determine where air should preferably escape, namely through at least one of the gussets 4 and where possible not, namely through the outer layers 14 and 15, because the head of the passenger in the event of an impact with the outer layer 15 is pressed.
  • Areas where air should preferably escape can either comprise an entire gusset layer, as at 46 in FIG. 10, or, as at 48, only parts thereof. Here you use less dense bonds from z. B. 2/2, 3/1 or 3/3.
  • the weaving process shown allows airbags to be manufactured in very different shapes, depending on the conditions of the vehicles in which they are to be installed.
  • the backrests and headrests of the front seats must be taken into account, as must the position of the door pillars.
  • Another way to achieve an asymmetrical airbag is to weave it from threads that have not fully shrunk. After cutting it out, it is placed over a heatable mold, which shrinks it, in a desired shape, which is determined by the shape.
  • FIGS. 11 to 13 show how the fabric can be used particularly well by skillfully arranging a plurality of two-part hollow bodies next to one another and in the longitudinal direction of a web, so that there is as little waste as possible, that is to say waste.
  • FIG. 12 shows several upper outer layers 14a on the top of the fabric layer in the longitudinal direction of the web (from top to bottom in FIG. 12). As FIG. 11 shows, these belong to upper hollow body parts 27a.
  • Upper outer layers 14b are arranged in the middle of the web, likewise several in the longitudinal direction of the web, one after the other, namely offset longitudinally with respect to the outer layers 14a in such a way that the bulges of the outer layers 14b are located where the narrower parts of the outer layers 14a leave space.
  • the larger hollow body parts with lower outer layers 15b are located in the middle of the web. These hollow body parts belong to those with upper outer layers 14b according to FIG. 12. On both outer sides there are lower outer layers 15a of narrower hollow body parts 28a (FIG. 11). At the outline 6, the upper hollow body parts merge into common upper layers 20, correspondingly the lower hollow body parts into common lower layers 21. The layers 20 and 21 merge outwards into overall layers 30.
  • the hollow bodies are cut out in such a way that an edge strip of a width sufficient for cohesion remains outside the contour lines 6.
  • the warp threads for such a fabric can be controlled with a jacquard device.
  • the upper outer layers 14a have two symmetrical halves, as do the upper outer layers 14b and the lower outer layers 15a and 15b. Warp threads of both halves can thus be controlled together.
  • the upper outer layers 14a on the right and left are the same, so they can be controlled as a whole. The same applies to the lower outer layers 15a. A detailed description is not necessary here, since experts familiar with jacquard devices can realize the same.
  • FIG. 14 shows in perspective an airbag of a different shape, which is produced by weaving, cutting and turning inside out, without the need for sewing processes. It has a front wall 50 facing the person to be secured, a right side wall 52 and a corresponding left side wall 60, an upper wall 54 and a lower wall 56. These walls form an opening 58 at the rear (top right in FIG. 14), the so-called ten "generator mouth", which is connected in a known manner to a gas generator.
  • Solid lines represent the outer edges of the airbag, dash-dotted lines woven connections between fabric parts, and dashed lines, as usual, hidden edges. (This also applies to Figures 16 and 18).
  • the dash-dotted perpendicular lines 51 in FIG. 14 mean both woven connections and outer edges.
  • FIG. 15 shows in cross section a four-layer fabric web suitable for producing this airbag. It has a lowermost layer A, which corresponds to the width of the front wall 50, and a second lowermost layer B above it. This corresponds to a section of the side wall that upper and lower walls, namely a side wall section 52B which is delimited on the right by a dash-dotted line, that is to say a selvedge, as well as a section 54B of the upper wall and a section 56B of the lower wall.
  • a second uppermost layer C corresponds to the majority of the right side wall 52, namely a section 52C from the dash-dotted line to the rear end at the opening 58.
  • a top layer D has the greatest usable width of all layers. It serves to form the entire left side wall 60.
  • the layers C and D are interwoven on the right in FIG.
  • the layers A and B are woven into a lower outer common layer A-B, the layers B and C to a middle common layer B-C. These, the bottom layer A and the top layer D are woven to the left to form an outer common layer (A-B-C-D). On the right, the upper common layer C-D and the lower common layer A-B are also woven into an outer common layer A-B-C-D.
  • the fabrics of layers B-C and A-B can largely consist of weft threads alone, so that warp threads can be saved, if not necessary. In most places, however, an edge strip of a width sufficient for cohesion, which also contains warp threads, that is to say represents a correct fabric, is required.
  • the common layers are cut off in such a way that such an edge strip remains. The cut edges are shown by perpendicular broken lines.
  • a cut edge 62 cuts through the layers C-D such that there is an opening on the right, namely the opening 58 from FIG. 14.
  • FIG. 16 shows the airbag after the common layers have been cut off. Edge strips, namely between the outer solid lines and the selvedges shown in dash-dot lines, initially protrude outwards. A lower-lying selvedge 64 (FIG. 15) is also shown in FIG. 16, namely by two lines and a dot.
  • the airbag can be turned inside out through its opening 58, and then, when inflated, the structure according to FIG. 14 is obtained.
  • the left side wall 60 shown in FIG. 16, which corresponds to position D, moves backward in FIG. 14 as a result of the turning inside , while the side wall 52 consisting of the sections 52B and 52C then appears on the right in FIG. 14.
  • the fabric web has a top layer F and a bottom layer A, the usable parts of which each have about half the width of the front wall 50. At their right edges they are each woven with a second uppermost layer E and a second lowest layer B, namely to upper and lower outer common layers EF and AB. A third uppermost and a third lowest layer D or C extend further to the right than the other layers and form parts of the side walls of the airbag, corresponding to 52C in FIG. 14. They are interwoven with one another on the right in FIG. 17 and with layers AB and EF a common outermost layer A to F interwoven. Again, large parts of the layers AB and EF can only consist of weft threads.
  • the right-hand part cuts off the broken lines drawn vertically.
  • the right end of the layers DC is again open, resulting in the opening 58 of the airbag.
  • the second and third uppermost and the second and third lowest layers D, E and B, C are woven together to form a common outer layer ED and CB. All six layers are woven together on their outer left edge to form a common outermost layer A to F.
  • FIG. 18 shows the finished woven airbag after it has been cut off, but before it has been turned inside out. After inverting, the structure according to FIG. 14 results with slight deviations.
  • the front wall 50 thus has a vertical selvedge in the middle.
  • the left side wall 60 is also divided vertically, as is shown in FIG. 14 only for the right side wall 52. Sections corresponding to 54B and 56B are also available on the left.
  • the positions from which the airbag has been woven are identified in FIG. 18 by capital letters corresponding to FIG. 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Woven Fabrics (AREA)
  • Air Bags (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

L'invention concerne un corps textile creux réalisable sensiblement par tissage, pour lequel un textile à quatre ou à six plis est produit. Des plis individuels se convertissent à l'extérieur, hors des zones utiles centrales, en plis communs. Après que les zones marginales extérieures des plis communs aient été découpées, le corps textile creux est retourné.
EP94908183A 1992-08-14 1993-08-13 Corps textile creux et son procede de fabrication Withdrawn EP0655094A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4226954 1992-08-14
DE19924226954 DE4226954A1 (de) 1992-08-14 1992-08-14 Textiler Hohlkörper und Verfahren zu seiner Herstellung
DE4324487 1993-07-21
DE4324487A DE4324487B4 (de) 1993-07-21 1993-07-21 Textiler Hohlkörper und Verfahren zu seiner Herstellung
PCT/EP1993/002161 WO1994004734A1 (fr) 1992-08-14 1993-08-13 Corps textile creux et son procede de fabrication

Publications (1)

Publication Number Publication Date
EP0655094A1 true EP0655094A1 (fr) 1995-05-31

Family

ID=25917536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94908183A Withdrawn EP0655094A1 (fr) 1992-08-14 1993-08-13 Corps textile creux et son procede de fabrication

Country Status (10)

Country Link
EP (1) EP0655094A1 (fr)
JP (1) JPH08500638A (fr)
KR (1) KR950703088A (fr)
AU (1) AU4947493A (fr)
BR (1) BR9306900A (fr)
CA (1) CA2142446A1 (fr)
CZ (1) CZ37795A3 (fr)
PL (1) PL307440A1 (fr)
RU (1) RU95109442A (fr)
WO (1) WO1994004734A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430221C1 (de) * 1994-06-10 1995-11-02 Johann Berger Hohlkörper beachtlicher Tiefe für einen Airbag
GB9502694D0 (en) * 1995-02-11 1995-03-29 Umist Weaving of preforms
JP3069601B2 (ja) 1996-10-03 2000-07-24 東洋ゴム工業株式会社 側部用エアバッグ
DE19861345B4 (de) * 1998-02-23 2007-03-08 Bst Safety Textiles Gmbh Verfahren zum Herstellen von Airbags
DE19903361A1 (de) 1999-01-28 2000-08-03 Breed Automotive Tech Verfahren zur Herstellung eines Luftsackes und Luftsack
US6398253B1 (en) * 1999-09-01 2002-06-04 Trw Occupant Restraint Systems Gmbh & Co. Kg Gas bag protective device
US8859774B2 (en) 2012-05-25 2014-10-14 Corcept Therapeutics, Inc. Heteroaryl-ketone fused azadecalin glucocorticoid receptor modulators
NL2021851B1 (en) * 2018-10-22 2020-05-13 Evertex Beheer Bv Seamless one-piece woven textile 3D object
DE102020108400B3 (de) * 2020-03-26 2021-08-12 Global Safety Textiles Gmbh OPW-Luftsack
DE102020108396B3 (de) * 2020-03-26 2021-08-12 Global Safety Textiles Gmbh OPW-Luftsack

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
GB1507152A (en) * 1975-03-14 1978-04-12 Toray Industries Fabric material for producing woven air bags utilized for protecting riders in vehicles
JPH0692218B2 (ja) * 1987-12-11 1994-11-16 旭化成工業株式会社 衝撃吸収用バッグおよびその製造法
DE69032826T2 (de) * 1989-02-16 1999-08-12 Airbags Int Ltd Luftsack
US5098125A (en) * 1990-06-08 1992-03-24 Stern & Stern Industries, Inc. Tube, airbag, and method of making the same
GB9028173D0 (en) * 1990-12-28 1991-02-13 Airbags Int Ltd Air bag

Non-Patent Citations (1)

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Title
See references of WO9404734A1 *

Also Published As

Publication number Publication date
RU95109442A (ru) 1997-03-20
CA2142446A1 (fr) 1994-03-03
AU4947493A (en) 1994-03-15
KR950703088A (ko) 1995-08-23
WO1994004734A1 (fr) 1994-03-03
BR9306900A (pt) 1998-12-08
PL307440A1 (en) 1995-05-29
JPH08500638A (ja) 1996-01-23
CZ37795A3 (en) 1995-11-15

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