EP0163778B1 - Ruban extensible et procédé pour sa fabrication - Google Patents

Ruban extensible et procédé pour sa fabrication Download PDF

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Publication number
EP0163778B1
EP0163778B1 EP84116493A EP84116493A EP0163778B1 EP 0163778 B1 EP0163778 B1 EP 0163778B1 EP 84116493 A EP84116493 A EP 84116493A EP 84116493 A EP84116493 A EP 84116493A EP 0163778 B1 EP0163778 B1 EP 0163778B1
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EP
European Patent Office
Prior art keywords
stretch
belt
auxiliary
phase
extensibility
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.)
Expired
Application number
EP84116493A
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German (de)
English (en)
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EP0163778A1 (fr
Inventor
Gerhard Koch
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IEPERBAND NV
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IEPERBAND NV
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Publication date
Application filed by IEPERBAND NV filed Critical IEPERBAND NV
Publication of EP0163778A1 publication Critical patent/EP0163778A1/fr
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/0005—Woven fabrics for safety belts

Definitions

  • the invention relates to an elastic belt, in particular a safety belt for seat restraint systems in vehicles, made of a basic material and additional material joined together, the basic material and additional material being deformable to different degrees.
  • a tape is known from DE-B-2 218 253.
  • a stretchable webbing in motor vehicles is known for restraining an occupant at the time of the accident. In such a moment as much energy as possible must be wasted.
  • energy-absorbing straps are used that stretch under load.
  • the body of the vehicle occupant exerts a load or pressure on the belt webbing and this can stretch a certain distance under the absorption of energy. This way, i.e. this stretch should be used to the maximum, but should not be exceeded.
  • the stretch should be chosen as large as possible for the optimal energy absorption, in order to enable the energy absorption by the additionally provided way.
  • this path may only be so large that the vehicle occupant does not use objects arranged in front of him, such as, for. B. windshield, dashboard or the like, comes into contact.
  • the elasticity must not be so low that the occupant's body would be subjected to too much stress and thus injured at the moment of the accident.
  • the band or fabric can have a certain construction (weave, laminate structure), which means that a special stretching behavior can be incorporated as well as through the thermal treatment of the finished band. It is indeed possible in this way to produce high, medium or low stretch tapes or fabrics; however, a certain curve profile, in which the increase in force over the elongation is given in percent, cannot be achieved because, without boundary conditions, special points of a specific reference elongation value cannot be specified.
  • shock absorption or shock absorption by energy absorption of a band has also been provided in that the respective band is placed in a loop and this is fixed by tear seams. This is also a special construction of the finished band, which makes the band thicker at the point of the loop.
  • the elasticity can only be adjusted by providing a correspondingly thick construction. If you use threads of different characteristics or properties and if you also provide a special design for energy absorption, then the force-elongation curves can be made flatter, the end product, i.e. the tape or fabric, but still has an undesirably high thickness.
  • the object of the invention is therefore to provide an expandable band and a method for producing the same, in which one achieves a desired ideal force-expansion curve for a certain energy consumption and the band nevertheless has a high strength with the same thickness as the conventional standard bands.
  • the base material is more deformable than the only additional material with the same force.
  • a high deformability means great flexibility.
  • such a belt has a high elongation and therefore absorbs energy while extending the distance that a vehicle occupant travels forward in the direction of movement at the time of the accident.
  • two materials are therefore provided which have a different force expansion curve.
  • the material with the highest elasticity is used as the base material.
  • the additional material has a lower elasticity than the base material, so that it tears (suddenly) at a certain load point. In the band, this additional material can form the stems, for example.
  • the force-expansion curve can be described in two initial phases.
  • the first phase for example, the body of the occupant is pressed against the belt at the time of the accident and mainly stretches the stem or the additional material (loaded in the longitudinal direction of the belt), which specifies a steeper rise in the curve and breaks at a certain force value.
  • the occupant's body travels very little in the initial area.
  • the load exerted on the webbing by the occupant is transferred to the base material with the higher extensibility. The curve then settles more or less straight with a much lower gradient.
  • the base material and the additional material consist of the same substance.
  • the stretchability can also be influenced with the help of the construction, as was always the case with conventional tapes. In the case of flat threads, you cannot change the inherent or material-related stretch (material stretch). When weaving, on the other hand, the stretch can be increased, for example, by double bonds. According to the invention, however, the aim is to keep the constructional stretch low so that the webbing does not become too thick.
  • the invention provides for the base material and the additional material to be joined together by weaving to form an at least one-layer fabric.
  • the warp material with low stretchability and the material with the highest stretchability can advantageously be provided as a carrier as additional material in this case of a fabric. Since the warp threads are known to lie in the longitudinal direction of the webbing, the initial force absorption is first transmitted to them, so that the steep curve rise results in the manner described above. After the warp threads have been torn, the material with the highest elasticity then takes over as the carrier material, namely on the weakly rising part of the force expansion curve in phase 11.
  • the ideal force-expansion curve can be achieved through the use of numerous base materials and numerous additional materials, it has proven to be sufficient and already very expedient if, according to the invention, only two materials of different stretchability are joined together.
  • the first material with the low deformability or stretchability specifies phase I in the steep region of the ascending curve, and the other, the base material, takes over the load with greater force when the warp threads break, which can therefore also be called tear threads or tear strips Elasticity.
  • the additional material has no or almost no material or structural expansion capability. In the force-expansion curve, this means that in phase I the little deformable additional material gives no or almost no elongation and therefore only a low energy consumption.
  • the new band according to the invention is constructed in such a way that its breaking-elongation behavior can be optimally influenced.
  • the belt With the values of the force expansion curve, the belt can be designed so that when the belt is loaded, a steep rise in force first occurs, which flattens out at a preprogrammed point at the end of phase I, the first reference stretch point, while in the flatter area (phase II) Carrier or base material then picks up the load and absorbs energy.
  • the thickness of the tape or fabric according to the invention can be maintained or remain small compared to conventional, standard tapes or fabrics that have no properties for shock absorption.
  • an ideal force expansion curve can also be pre-programmed
  • one or both of the materials processed to form the tape are pretreated mechanically and / or by heat at the latest during assembly.
  • the characteristics of the individual materials used for the production of the band can be individually set and changed such that the ideal force-expansion curve can ultimately be achieved after the materials have been joined.
  • a strip can be produced in a combination of the same or different base materials, which produces different force expansion curves.
  • the additional and / or the base material with higher extensibility is / are brought to a certain reference elongation value by drawing, shrinking and / or treating the material by twisting.
  • the chain is a stem in the case of the fabric and is enclosed by a double fabric.
  • the double fabric, the upper and lower chain, is connected in this embodiment of the invention by a third connecting chain.
  • the preferred treatment of the individual materials before or at the latest when joining, e.g. in weaving, for example in thermal treatment consists in drawing or shrinking with heat and then cooling to fix it. Without heat, the materials can also be mechanically pretreated by twisting the threads or twisting them up.
  • This formula means that the specific reference elongation in the course of phases II and I when stretching a webbing to deliver the force-expansion curve described above can be calculated by adding the following three summands: the first summand represents the material elongation in stretch phases II and I. The second addend represents the design stretch, and the third addend is the specified or predefined elongation or extension.
  • the material stretch is the stretch that is already present in the material, both in the base material and in the additional material.
  • the constructional stretch means the stretchability achieved or achievable by the construction of the belt structure. It has already been indicated above that a special scope for the modern manufacturing process cannot be achieved if one does not want the tape to become too thick. The most interesting summand is therefore the third, the stretch or extension to be specified; i.e. the elasticity given or to be given to the respective material by a mechanical or thermal pretreatment. Pulling, shrinking, twisting are some of the ways in which the materials can be influenced.
  • thermal and / or mechanical treatment of the material of a fabric takes place before the weaving process and the material of a laminated construction before lamination. This is the best way to treat the respective material in these process stages.
  • Figure 1 is a force expansion diagram as can be achieved with conventional tapes and
  • Figure 2 is a force expansion diagram for a belt according to the invention.
  • curves can be achieved when used in a single-layer or multi-layer fabric, as shown for example in FIG. 2.
  • This is a tape constructed according to the invention, in which the threads with low elongation behavior or low elongation are used as carrier threads. They can also be called ripcords.
  • the threads with low elongation behavior or low elongation are used as carrier threads. They can also be called ripcords.
  • the first loading point these threads suddenly break.
  • the load on the belt is transferred at this point in the manner already described above to the other carrier threads, which have a higher extensibility.
  • the curve according to FIG. 2 results in a particularly advantageous band. It begins at the zero point and rises steeply with increasing force without great expansion to the point P1.
  • phase I The initial curve profile (phase I) of the force expansion diagram of this FIG. 2 is used when the band is loaded longitudinally tion of the low-stretching additional material, which in the case of the fabric is the warp material, which is embedded in the more deformable base material.
  • the material that is crucial for phase I has no or almost no material or construction stretch.
  • this additional material is torn approximately in the area of point P1, and the further course of the curve (phase II) is determined by the base material or carrier material, which has a higher stretching capacity or a higher stretchability.
  • this material could be brought to a predetermined reference extension.
  • the specific point P2 at which this reference extension is predetermined or measured is 10% / 1000 daN. This value point is called the reference elongation because one refers to a certain load.
  • phase I the starting curve course from zero point to point P1 (phase I) can be determined precisely preprogrammed if the pretreatment according to the invention is carried out.
  • phase II these different reference stretches in phases I and II cannot be achieved by thermal or mechanical aftertreatment of the strip that has already been joined or woven or constructed. Therefore, the mechanical or thermal treatment in the sense of the invention is called the pretreatment, which must be specified at the latest during the weaving process or the lamination process or extrusion.
  • phase II For a required reference elongation according to phase II of 6% / 1000 daN or at 2% / 800 daN according to phase I, the following must be calculated:
  • a lower load is therefore also advantageously transferred to the object to be secured or the vehicle occupant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Emergency Lowering Means (AREA)

Claims (9)

1. Ruban extensible, en particulier ruban de ceinture de sécurité pour système de retenue sur un siège dans un véhicule, comprenant un matériau de base et un matériau d'apport assemblé à celui-ci, de telle sorte que le matériau de base et le matériau d'apport aient une forte déformabilité différentielle, caractérisé en ce que le matériau de base, sous un effort équivalent, est plus fortement déformable que le matériau d'apport unique.
2. Ruban selon la revendication 1, caractérisé en ce que le matériau de base et le matériau d'apport sont composés de la même matière.
3. Ruban selon la revendication 1 ou 2, caractérisé en ce que le matériau de base et le matériau d'apport sont assemblés par tissage en un tissu d'une seule couche au minimum.
4. Ruban selon la revendication 3, caractérisé en ce qu'il est prévu dans le tissu le matériau d'apport comme matériau de chaîne à faible extensibilité et le matériau à haute extensibilité comme support.
5. Ruban selon l'une quelconque des revendications 1 à 4, caractérisé en ce que deux matériaux seulement de différentes extensibilités, sont assemblés mutuellement.
6. Ruban selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le matériau d'apport ne comporte pas ou quasiment pas d'extensibilité intrinsèque ou de construction.
7. Procédé pour la fabrication d'un ruban extensible selon l'une quelconque des revendications 1 à 6, caractérisé par l'emploi de la formule suivante:
Figure imgb0009
où:
BD = allongement de référence
MD = allongement intrinsèque
KD = allongement de construction
VD/S = Allongement ou étirage recherché par traitement préalable
I = phase 1
Il = phase 11, où un matériau ou les deux matériaux servant à l'élaboration du ruban sont traités préalablement mécaniquement et (ou) thermiquement, au plus tard durant l'assemblage.
8. Procédé selon la revendication 7, caractérisé en ce que le matériau d'apport et (ou) le matériau de base à extensibilité supérieure est ou sont portés à un allongement de référence déterminé par traitement du matériau par étirage, retrait et (ou) par retordage.
9. Procédé selon la revendication 7, caractérisé en ce que le traitement thermique et (ou) mécanique du matériau d'un tissu s'effectue avant le traitement de tissage et que celui d'un matériau produit par stratification s'effectue avant la stratification.
EP84116493A 1984-06-07 1984-12-29 Ruban extensible et procédé pour sa fabrication Expired EP0163778B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3421146 1984-06-07
DE19843421146 DE3421146A1 (de) 1984-06-07 1984-06-07 Dehnungsfaehiges band und verfahren zur herstellung desselben

Publications (2)

Publication Number Publication Date
EP0163778A1 EP0163778A1 (fr) 1985-12-11
EP0163778B1 true EP0163778B1 (fr) 1989-03-22

Family

ID=6237788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116493A Expired EP0163778B1 (fr) 1984-06-07 1984-12-29 Ruban extensible et procédé pour sa fabrication

Country Status (5)

Country Link
US (1) US4662487A (fr)
EP (1) EP0163778B1 (fr)
JP (1) JPS60261474A (fr)
DE (2) DE3421146A1 (fr)
ES (1) ES8705313A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3714088A1 (de) * 1987-04-28 1988-12-01 Messerschmitt Boelkow Blohm Gurtband fuer ein rueckhaltesystem in einem fahrzeug, insbesondere in einem luftfahrzeug
DE3735077A1 (de) * 1987-10-16 1989-05-03 Schroth Gmbh Carl F Sicherheitsgurt
DE59310080D1 (de) * 1992-07-04 2000-08-31 Stahl Carl Gmbh Co Kg Verfahren zur Herstellung eines Gurtbandes und in diesem Verfahren hergestelltes Gurtband
JP2757697B2 (ja) * 1992-08-04 1998-05-25 日産自動車株式会社 シートベルト装置
US5376440A (en) * 1993-03-31 1994-12-27 Ikeda Bussan Co., Ltd. Woven fabric for seat belt
US6006860A (en) * 1993-11-10 1999-12-28 Bell; Michael Safety harness or belt with fiber means to indicate shock loading
JPH07246909A (ja) * 1994-03-11 1995-09-26 Ikeda Bussan Co Ltd 年少者用の衝撃吸収ベルト
DE19513259A1 (de) * 1995-04-07 1996-10-10 Trw Repa Gmbh Gewebtes Gurtband für ein Fahrzeuginsassenrückhaltesystem
US6405685B1 (en) 1996-09-24 2002-06-18 Dalloz Fall Protection Investment, Inc. Method of fabricating a safety harness
US6006700A (en) * 1996-09-24 1999-12-28 Dalloz Safety, Inc. Safety harness
US6071835A (en) * 1998-06-16 2000-06-06 Alliedsignal Inc. Load limiting webbing
US6378465B1 (en) * 1999-10-15 2002-04-30 Protecta International, Inc. Full-body safety harness
US6619752B1 (en) 2001-11-21 2003-09-16 Cosco Management, Inc. Extensible tether for juvenile vehicle seat
US20050189169A1 (en) * 2004-03-01 2005-09-01 Hajime Tanaka Shock absorbing lanyards
US8387749B2 (en) 2004-03-01 2013-03-05 Ykk Corporation Of America Shock absorbing fabric structures
CA2619758C (fr) 2005-08-16 2012-05-08 Ykk Corporation Of America Sangles d'absorption d'energie
JP4896167B2 (ja) * 2009-01-23 2012-03-14 菊地工業株式会社 エネルギー吸収ベルト
US8316988B2 (en) 2010-08-12 2012-11-27 Ykk Corporation Of America Shock absorbing fabric structures
US9328436B2 (en) 2013-03-14 2016-05-03 Ykk Corporation Of America Energy absorbing fabric and method of manufacturing same

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1125212A (en) * 1965-12-13 1968-08-28 Industrifjadrar Ab Improvements in or relating to straps for safety seat belts
JPS498918B1 (fr) * 1966-06-10 1974-02-28
US3464459A (en) * 1968-01-17 1969-09-02 Burlington Industries Inc Webbings for safety restraint systems
FR1571377A (fr) * 1968-02-29 1969-06-20
JPS4925117B1 (fr) * 1970-12-29 1974-06-27
US3820843A (en) * 1972-03-21 1974-06-28 Toyota Motor Co Ltd Webbing and belting means for use in seat belts
JPS5420732B2 (fr) * 1973-04-18 1979-07-25
JPS5319078B2 (fr) * 1973-09-08 1978-06-19
DE2521124B2 (de) * 1975-05-13 1977-05-26 Elastic - Berger Ohg, 7071 Alfdorf Gurtband fuer sicherheitsgurte
US4126356A (en) * 1975-07-29 1978-11-21 Takata Kojyo Co., Ltd. Seat belt webbing construction
JPS52118356A (en) * 1976-03-30 1977-10-04 Toray Industries Energy absorbing belt and method of producing same
DE2659789C3 (de) * 1976-12-31 1980-03-13 Johann Berger Gewebtes Gurtband mit Hohlkanten
US4298648A (en) * 1979-02-28 1981-11-03 Celanese Corporation Belting fabric

Also Published As

Publication number Publication date
DE3421146A1 (de) 1985-12-12
EP0163778A1 (fr) 1985-12-11
ES8705313A1 (es) 1987-05-01
JPS60261474A (ja) 1985-12-24
DE3477408D1 (en) 1989-04-27
US4662487A (en) 1987-05-05
ES539385A0 (es) 1987-05-01

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