WO1999022969A1 - Belt tensioner with a pyrotechnic rotation drive mechanism - Google Patents

Belt tensioner with a pyrotechnic rotation drive mechanism Download PDF

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Publication number
WO1999022969A1
WO1999022969A1 PCT/EP1998/006942 EP9806942W WO9922969A1 WO 1999022969 A1 WO1999022969 A1 WO 1999022969A1 EP 9806942 W EP9806942 W EP 9806942W WO 9922969 A1 WO9922969 A1 WO 9922969A1
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WO
WIPO (PCT)
Prior art keywords
belt
seat belt
tensioner according
belt tensioner
tension band
Prior art date
Application number
PCT/EP1998/006942
Other languages
German (de)
French (fr)
Inventor
Artur Föhl
Original Assignee
Foehl Artur
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 Foehl Artur filed Critical Foehl Artur
Publication of WO1999022969A1 publication Critical patent/WO1999022969A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/195—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type
    • B60R22/1951—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type characterised by arrangements in vehicle or relative to seat belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/12—Construction of belts or harnesses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4604—Reels with means to tension the belt in an emergency by forced winding up characterised by arrangements in vehicle or relative to seat belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R2022/3427—Seat belt connection on reels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators

Definitions

  • the invention relates to a belt tensioner with pyrotechnic rotary drive for a seat belt, preferably an end fitting tensioner of a 3-point automatic seat belt.
  • Belt tensioners of this type must in particular have very small dimensions, since they are arranged next to, under or on a vehicle seat.
  • Belt tensioners are usually designed either as linear tensioners or as rotary tensioners, in the latter case so far the free end of the seat belt has been connected directly and in its full width to the tensioner.
  • the invention provides a belt tensioner that has a smaller axial length than previously known. This is achieved in the case of a belt tensioner of the type mentioned at the outset by providing a flexible tension band connected to the spool shaft, which is connected to the seat belt and on the spool shaft
  • the width of the drawstring is smaller than that of the seat belt.
  • the drawstring also has at least the same strength as the seat belt.
  • the webbing is rolled up over its entire width on the take-up shaft, whereas in the belt tensioner according to the invention a piece of drawstring of smaller width is provided, which is wound on the spool shaft and through which the width of the entire tensioner is compared by more than 50% known belt tensioners can reduce.
  • a drawstring usually has a much higher tensile strength with the same tensile strength
  • the flexible drawstring can consist of the same material as the webbing and can also be integrally connected to it. This can be achieved in that the drawstring is an extension of the free end of the seat belt on which the belt tensioner engages.
  • the seat belt in the area of the free end is folded inwards with its free side edges. The free edges are glued or sewn to one another or to the center piece of the seat belt and can even overlap.
  • Another possibility is to provide a separate drawstring, e.g. from fabric tape attached to the free end of the seat belt, e.g. by sewing on.
  • the flexible drawstring always has the same width and thickness in the feed area of the belt tensioner, so that a uniform roll-up process is also made possible.
  • the spool shaft in rotary tensioners is directly coupled to the rotary drive and can even be rigidly connected to it.
  • the belt tensioner has a device which, after activation, prevents the belt webbing from being pulled out again.
  • FIG. 1 shows a perspective view of a first embodiment of the belt tensioner according to the invention
  • FIG. 2 shows a second embodiment of the belt taut, only the free end of the seat belt and the drawstring attached are shown, and
  • FIG. 3 shows a cross-sectional view through the belt reel in the embodiment according to FIG. 2.
  • FIG. 1 shows a belt tensioner, more precisely a multi-blade rotor tensioner, in which a rotary piston drive 3 is directly coupled to a spool shaft 5.
  • a linear drive in which a rotary movement is generated via a toothed rack and a pinion arranged on the spool shaft 5.
  • the belt tensioner shown in Figure 1 is designed as an end fitting tensioner, i.e. the end of a seat belt 7 is moved by pressing the punches.
  • the belt tensioner itself is attached under the vehicle seat, whereby belt deflection elements (e.g. rollers), not shown, are also provided.
  • the seat belt 7 is fastened with its free end to the spool shaft 5 by pulling it through a slot in the spool shaft 5 and fastening it to it, as will be explained in more detail with reference to FIG. 3.
  • the safety belt 7 is turned over in the area of its free end with the free edges 9 inwards, so that a C-shaped profile results in cross section.
  • the free edges 9 are then together and at the center of the
  • the area 11 in which the webbing has been folded in is referred to as the tension band, which ensures a connection of the spool shaft 5 to the seat belt 7 in the area of its full width.
  • the length of the drawstring 11 must at least correspond to the tensioning path.
  • the tensioning path in turn is determined in the embodiment shown by the amount of gas supplied by the gas generator inside the belt tensioner. In the embodiment shown in FIG. 1, in which the seat belt gradually and steadily narrows into the tension band 11, the tension band 11 is relatively stiff and thick, so that due to this rigidity, increased resistance is provided when rolling up.
  • the tension band 11 ' is designed as a separate, flexible part.
  • the tension band 11 ' is also a fabric band, the strength of which is even higher than that of the seat belt 7'.
  • the tie band 11 'and the free end of the seat belt 7' are connected by sewing, the free edges 9 'of the seat belt 7' being folded inwards in a triangular shape.
  • Edges 9 ' are even turned so far that they overlap to form an open pocket, as shown in Fig. 2.
  • the drawstring 11 ' is then inserted into this pocket to such an extent that it even protrudes from the pocket.
  • the tension band 11 ' is sewn to the seat belt 7', so that the edges 9 'are also fixed by the preferably one seam. A very stable fastening of the tension band 11 'is thereby achieved. It is also advantageous if the seat belt becomes narrower and narrower up to its free end and finally reaches the width of the tension band 11 '. This ensures an even power transfer from
  • a known device can act in the belt tensioner, which prevents the belt from being pulled out again or allows the belt to be pulled out again, while limiting a force to be applied.
  • Figures 1 and 2 shown to use, quite useful even with linear tensioners.
  • a linear tensioner (provided as a final fitting tensioner, for example) could be attached under a vehicle seat, and the tension band 11 or 11 'extends over at least the length of the tensioning path beyond a deflection device.
  • the deflection device can, for example, change the horizontal course of the tension band 11 to a vertical course or an approximately vertical course.
  • the tension band 11 would be mounted as part of the linear tensioner via a bearing pin on a fork-shaped end of a piston rod.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

The invention relates to a pyrotechnic rotation drive mechanism for a seat belt (7) preferably an end tensioning armature of a three-point automatic seat belt (7; 7'). The belt tensioner is characterized by a flexible tension band (11) connected to the coil shaft (5). Said tension band is connected to the seat beat (7) and is wound on the coil shaft (5) during activation. The width of the tension band (11) is smaller than that of the seat belt (7). The tension band has at least the same strength as the seat belt (7).

Description

Gurtstraffer mit pyrotechnischem Rotationsantrieb Belt tensioners with pyrotechnic rotary drive
Die Erfindung betrifft einen Gurtstraffer mit pyrotechnischem Rotationsantrieb für einen Sicherheitsgurt, vorzugsweise einen Endbeschlagstraffer eines 3-Punkt- Automatiksicherheitsgurtes.The invention relates to a belt tensioner with pyrotechnic rotary drive for a seat belt, preferably an end fitting tensioner of a 3-point automatic seat belt.
Derartige Gurtstraffer müssen insbesondere sehr kleine Baumaße haben, da sie neben, unter einem oder an einem Fahrzeugsitz angeordnet sind. Gurtstraffer sind üblicherweise entweder als Linearstraffer oder als Rotationsstraffer ausgebildet, wobei in letzterem Fall bislang das freie Ende des Sicherheitsgurts direkt und in seiner vollen Breite an den Straffer angeschlossen ist. Die Breite der heutzutage üblichenBelt tensioners of this type must in particular have very small dimensions, since they are arranged next to, under or on a vehicle seat. Belt tensioners are usually designed either as linear tensioners or as rotary tensioners, in the latter case so far the free end of the seat belt has been connected directly and in its full width to the tensioner. The breadth of the usual today
Sicherheitsgurte ist standardisiert und beträgt knapp 50 mm. Insbesondere bei an Gurtaufrollautomaten angeflanschten Rotationsstraffern bestimmt deshalb die Gurtbandbreite großteils die Baulänge in Achsrichtung.Seat belts are standardized and are just under 50 mm. In the case of rotary tensioners flanged to automatic belt retractors in particular, the belt width largely determines the overall length in the axial direction.
Die Erfindung schafft einen Gurtstraffer, der eine geringere axiale Baulänge aufweist als bislang bekannte. Dies wird bei einem Gurtstraffer der eingangs genannten Art dadurch erreicht, daß ein mit der Spulenwelle verbundenes flexibles Zugband vorgesehen ist, welches mit dem Sicherheitsgurt verbunden ist und auf der Spulenwelle beiThe invention provides a belt tensioner that has a smaller axial length than previously known. This is achieved in the case of a belt tensioner of the type mentioned at the outset by providing a flexible tension band connected to the spool shaft, which is connected to the seat belt and on the spool shaft
Aktivierung aufgewickelt wird. Die Breite des Zugbandes ist kleiner als die des Sicherheitsgurts. Das Zugband weist darüber hinaus wenigstens dieselbe Festigkeit wie der Sicherheitsgurt auf. Bei den bislang bekannten Rotationsstraffern wird das Gurtband über seine gesamte Breite auf der Aufwickelwelle aufgerollt, wogegen beim erfindungsgemäßen Gurtstraffer ein Zugbandstück von geringerer Breite vorgesehen ist, das auf der Spulenwelle aufgewickelt wird und durch das sich die Breite des gesamten Straffers um mehr als 50 % gegenüber bekannten Gurtstraffern reduzieren läßt. Ein Zugband hat darüber hinaus bei gleicher Zugfestigkeit üblicherweise eine weitaus höhereActivation is wound up. The width of the drawstring is smaller than that of the seat belt. The drawstring also has at least the same strength as the seat belt. In the previously known rotary tensioners, the webbing is rolled up over its entire width on the take-up shaft, whereas in the belt tensioner according to the invention a piece of drawstring of smaller width is provided, which is wound on the spool shaft and through which the width of the entire tensioner is compared by more than 50% known belt tensioners can reduce. In addition, a drawstring usually has a much higher tensile strength with the same tensile strength
Flexibilität als ein Zugseil und läßt sich leichter aufrollen als andere Zugübertragungsmittel. Auch läßt sich ein Verbinden von Sicherheitsgurt und Zugband leichter und ohne Zwischenschaltung anderer Teile erreichen als eine Verbindung von z.B. Seil mit Sicherheitsgurt.Flexibility than a pull rope and is easier to roll up than other means of transmission. It is also easier to connect the seat belt and the drawstring and without interposing other parts than connecting the rope to the seat belt, for example.
Das flexible Zugband kann aus demselben Material wie das Gurtband bestehen und auch einstückig mit ihm verbunden sein. Dies kann dadurch erreicht werden, daß das Zugband eine Verlängerung des freien Endes des Sicherheitsgurtes, an dem der Gurtstraffer angreift, darstellt. Dabei ist der Sicherheitsgurt im Bereich des freien Endes mit seinen seitlichen, freien Rändern nach innen gefaltet. Die freien Ränder werden aneinander oder mit dem Mittelstück des Sicherheitsgurts verklebt oder vernäht und können sich sogar überlappen. Eine andere Möglichkeit besteht darin, ein separates Zugband vorzusehen, z.B. aus Gewebeband, welches an dem freien Ende des Sicherheitsgurts befestigt ist, z.B. durch Annähen.The flexible drawstring can consist of the same material as the webbing and can also be integrally connected to it. This can be achieved in that the drawstring is an extension of the free end of the seat belt on which the belt tensioner engages. The seat belt in the area of the free end is folded inwards with its free side edges. The free edges are glued or sewn to one another or to the center piece of the seat belt and can even overlap. Another possibility is to provide a separate drawstring, e.g. from fabric tape attached to the free end of the seat belt, e.g. by sewing on.
Vorzugsweise weist das flexible Zugband im Einzugsbereich des Gurtstraffers stets die gleiche Breite und Dicke auf, so daß auch ein gleichmäßiger Auf roll Vorgang ermöglicht wird.Preferably, the flexible drawstring always has the same width and thickness in the feed area of the belt tensioner, so that a uniform roll-up process is also made possible.
Die Spulenwelle bei Rotationsstraffern ist direkt mit dem Rotationsantrieb gekoppelt und kann sogar starr mit ihm verbunden sein.The spool shaft in rotary tensioners is directly coupled to the rotary drive and can even be rigidly connected to it.
Der Gurtstraffer weist gemäß einer bevorzugten Ausführungsform eine Einrichtung auf, die nach Aktivierung ein Wiederausziehen des Gurtbandes verhindert. Darüber hinaus kann auch eine Einrichtung vorhanden sein, die nach Aktivierung des Gurtstraffers ein Wiederausziehen des Gurtes unter Kraftbegrenzung zuläßt.According to a preferred embodiment, the belt tensioner has a device which, after activation, prevents the belt webbing from being pulled out again. In addition, there may also be a device which, after activation of the belt tensioner, allows the belt to be pulled out again with a force limit.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und aus den nachfolgenden Zeichnungen, auf die Bezug genommen wird. In den Zeichnungen zeigen:Further features and advantages of the invention result from the following description and from the following drawings, to which reference is made. The drawings show:
Figur 1 eine Perspektivansicht einer ersten Ausführungsform des erfindungsgemäßen Gurtstraffers,FIG. 1 shows a perspective view of a first embodiment of the belt tensioner according to the invention,
Figur 2 eine zweite Ausführungsform des erfindungsgemäßen Gurt- straffers, wobei nur das freie Ende des Sicherheitsgurtes und das daran befestigte Zugband gezeigt sind, undFIG. 2 shows a second embodiment of the belt taut, only the free end of the seat belt and the drawstring attached are shown, and
Figur 3 eine Querschnittsansicht durch die Gurtspule bei der Aus- führungsform nach Figur 2.3 shows a cross-sectional view through the belt reel in the embodiment according to FIG. 2.
In Figur 1 ist ein Gurtstraffer, genauger gesagt ein Lamellen- rotorstraffer gezeigt, bei dem ein Drehkolbenantrieb 3 unmittelbar mit einer Spulenwelle 5 gekoppelt ist.FIG. 1 shows a belt tensioner, more precisely a multi-blade rotor tensioner, in which a rotary piston drive 3 is directly coupled to a spool shaft 5.
Anstatt eines Drehkolbenantriebs kann jedoch auch ein Linearantrieb vorgesehen sein, bei dem über eine Zahnstange und ein an der Spulenwelle 5 angeordnetes Ritzel eine Drehbewegung erzeugt wird. Der in Figur 1 dargestellte Gurtstraffer ist als Endbeschlagstraffer ausgebildet, d.h. das Ende eines Sicherheitsgurtes 7 wird bei Betätigung des Straf fers verschoben. Der Gurtstraffer selbst ist unter dem Fahrzeugsitz angebracht, wobei zudem nicht gezeigte Gurtumlenkelemente (z.B. Rollen) vorgesehen sind. Der Sicherheitsgurt 7 ist mit seinem freien Ende an der Spulenwelle 5 befestigt, indem er durch einen Schlitz in der Spulenwelle 5 gezogen und an ihr befestigt wird, wie anhand von Figur 3 näher erläutert werden wird. Um die Breite des Gurtstraffers möglichst gering zu halten, ist der Sicherheitsgurt 7 im Bereich seines freien Endes mit den freien Rändern 9 nach innen umgeschlagen, so daß sich im Querschnitt ein C-förmiges Profil ergibt. Die freien Ränder 9 sind dann aneinander und am Mittelstück desInstead of a rotary piston drive, however, a linear drive can also be provided, in which a rotary movement is generated via a toothed rack and a pinion arranged on the spool shaft 5. The belt tensioner shown in Figure 1 is designed as an end fitting tensioner, i.e. the end of a seat belt 7 is moved by pressing the punches. The belt tensioner itself is attached under the vehicle seat, whereby belt deflection elements (e.g. rollers), not shown, are also provided. The seat belt 7 is fastened with its free end to the spool shaft 5 by pulling it through a slot in the spool shaft 5 and fastening it to it, as will be explained in more detail with reference to FIG. 3. In order to keep the width of the belt tensioner as small as possible, the safety belt 7 is turned over in the area of its free end with the free edges 9 inwards, so that a C-shaped profile results in cross section. The free edges 9 are then together and at the center of the
Sicherheitsgurtes durch Vernähen dauerhaft befestigt. Durch dieses Falten des Sicherheitsgurtes kann seine Breite halbiert oder sogar noch mehr verringert werden, letzteres insbesondere, wenn sich die Ränder 9 überlappen, was aber auf Kosten der Dicke geht. Der Bereich 11, in dem das Gurtband eingefaltet worden ist, wird als Zugband bezeichnet, das eine Verbindung der Spulenwelle 5 mit dem Sicherheitsgurt 7 im Bereich dessen voller Breite sicherstellt. Die Länge des Zugbandes 11 muß dabei wenigstens dem Straffweg entsprechen. Der Straffweg wiederum wird bei der gezeigten Ausführungsform durch die vom Gasgenerator im Inneren des Gurtstraffers gelieferte Gasmenge festgelegt. Bei der in Figur 1 gezeigten Ausführungsform, bei der der Sicherheitsgurt allmählich und stetig schmäler werdend in das Zugband 11 übergeht, ist das Zugband 11 relativ steif und dick, so daß auf- grund dieser Steifigkeit ein erhöhter Widerstand beim Aufrollen vorgesehen ist.Seat belt permanently attached by sewing. By folding the seat belt, its width can be halved or even reduced, the latter in particular if the edges 9 overlap, but this is at the expense of the thickness. The area 11 in which the webbing has been folded in is referred to as the tension band, which ensures a connection of the spool shaft 5 to the seat belt 7 in the area of its full width. The length of the drawstring 11 must at least correspond to the tensioning path. The tensioning path in turn is determined in the embodiment shown by the amount of gas supplied by the gas generator inside the belt tensioner. In the embodiment shown in FIG. 1, in which the seat belt gradually and steadily narrows into the tension band 11, the tension band 11 is relatively stiff and thick, so that due to this rigidity, increased resistance is provided when rolling up.
Bei der in Figur 2 gezeigten Ausführungsform ist dieser Nachteil nicht vorhanden, da das Zugband 11 ' als separates, flexibles Teil ausgebildet ist. Das Zugband 11 ' ist ebenfalls ein Gewebeband, dessen Festigkeit sogar höher als die des Sicherheitsgurtes 7' ist. Die Verbindung des Zugbandes 11 ' und des freien Endes des Sicherheitsgurtes 7' erfolgt durch Vernähen, wobei die freien Ränder 9' des Sicherheits- gurtes 7' dreiecksförmig nach innen umgeschlagen sind. Die freienThis disadvantage does not exist in the embodiment shown in FIG. 2, since the tension band 11 'is designed as a separate, flexible part. The tension band 11 'is also a fabric band, the strength of which is even higher than that of the seat belt 7'. The tie band 11 'and the free end of the seat belt 7' are connected by sewing, the free edges 9 'of the seat belt 7' being folded inwards in a triangular shape. The free
Ränder 9' werden sogar so weit eingeschlagen, daß sie sich unter Bildung einer offenen Tasche überlappen, wie dies in Fig. 2 dargestellt ist. In diese Tasche wird anschließend das Zugband 11 ' so weit eingeführt, daß es aus der Tasche sogar noch heraussteht. Schließlich wird das Zugband 11' mit dem Sicherheitsgurt 7' vernäht, so daß durch die vorzugsweise eine Naht auch die Ränder 9' fixiert werden. Dadurch wird eine sehr stabile Befestigung des Zugbandes 11 ' erreicht. Weiter ist es vorteilhaft, wenn der Sicherheitsgurt bis zu seinem freien Ende hin gleichmäßig immer schmäler wird und schließlich die Breite des Zugban- des 11 ' erreicht. Dadurch wird ein gleichmäßiger Kraftübergang vomEdges 9 'are even turned so far that they overlap to form an open pocket, as shown in Fig. 2. The drawstring 11 'is then inserted into this pocket to such an extent that it even protrudes from the pocket. Finally, the tension band 11 'is sewn to the seat belt 7', so that the edges 9 'are also fixed by the preferably one seam. A very stable fastening of the tension band 11 'is thereby achieved. It is also advantageous if the seat belt becomes narrower and narrower up to its free end and finally reaches the width of the tension band 11 '. This ensures an even power transfer from
Sicherheitsgurt 7' zum Zugband 11 ' erreicht, so daß der Sicherheitsgurt 7' auf seiner gesamten Breite Kräfte weiterleitet. Das gegenüberliegende freie Ende des Zugbandes 11 ' ist zu einer Schlaufe vernäht, in die ein Füllstift 13 eingeschoben wird, nachdem das Zug- band durch einen Schlitz in der Spulenwelle 5 geschoben worden ist, wie Figur 3 näher zu entnehmen ist.Seat belt 7 'to the tension band 11' is reached, so that the seat belt 7 'transmits forces over its entire width. The opposite free end of the drawstring 11 'is sewn into a loop into which a filler pin 13 is inserted after the drawstring has been pushed through a slot in the spool shaft 5, as can be seen in more detail in FIG.
Nach erfolgtem Straffen kann eine bekannte Einrichtung im Gurtstraffer wirken, die ein Wiederausziehen des Gurtbandes verhindert oder ein Wiederausziehen des Gurtbandes unter Limitierung einer aufzubringenden Kraft zuläßt.After tightening, a known device can act in the belt tensioner, which prevents the belt from being pulled out again or allows the belt to be pulled out again, while limiting a force to be applied.
Die- Verringerung der Gurtbandbreite erlaubt es. den erfindungsgemäßen Gurtstraffer wesentlich schmäler auszubilden als bekannte. Darüber hinaus ist die Idee, ein schmales Zugband 11, wie in denThe reduction in the belt width allows it. to design the belt tensioner according to the invention much narrower than known ones. In addition, the idea of a narrow drawstring 11, as in the
Figuren 1 und 2 dargestellt, zu verwenden, durchaus auch bei Linearstraffern sinnvoll. So könnte ein (z.B. als Endbeschlagstraffer vorgesehener) Linearstraffer unter einem Fahrzeugsitz angebracht sein, und das Zugband 11 oder 11 ' erstreckt sich über wenigstens die Länge des Straffwegs über eine Umlenkeinrichtung hinaus. Die Umlenkeinrichtung kann beispielsweise den horizontalen Verlauf des Zugbandes 11 in einen vertikalen Verlauf oder annähernd vertikalen Verlauf ändern. Bei dieser Ausgestaltung wäre beispielsweise das Zugband 11 über einen Lagerstift an einem gabelförmigen Ende einer Kolbenstange als Teil des Linearstraffers gelagert. Figures 1 and 2 shown to use, quite useful even with linear tensioners. For example, a linear tensioner (provided as a final fitting tensioner, for example) could be attached under a vehicle seat, and the tension band 11 or 11 'extends over at least the length of the tensioning path beyond a deflection device. The deflection device can, for example, change the horizontal course of the tension band 11 to a vertical course or an approximately vertical course. In this embodiment, the tension band 11 would be mounted as part of the linear tensioner via a bearing pin on a fork-shaped end of a piston rod.

Claims

Patentansprüche claims
1. Gurtstraffer mit pyrotechnischem Rotationsantrieb für einen Sicherheitsgurt (7; 7'), vorzugsweise Endbeschlagstraffer eines 3-1. Belt tensioner with pyrotechnic rotary drive for a seat belt (7; 7 '), preferably end fitting tensioner of a 3-
Punkt- Automatik-Sicherheitsgurtes (7; 7'), gekennzeichnet durch ein mit der Spulenwelle (5) verbundenes flexibles Zugband (11; 11 '), das mit dem Sicherheitsgurt (7; 7') verbunden ist und auf der Spulenwelle (5) bei Aktivierung aufgewickelt wird, wobei die Breite des Zugbandes (11; 11') kleiner als die des Sicherheitsgurtes (7; 7') ist und dasPoint automatic seat belt (7; 7 '), characterized by a flexible drawstring (11; 11') connected to the spool shaft (5), which is connected to the seat belt (7; 7 ') and on the spool shaft (5) when activated, the width of the tension band (11; 11 ') is smaller than that of the seat belt (7; 7') and that
Zugband (11; 11 ') wenigstens dieselbe Festigkeit wie der Sicherheitsgurt (7; 7') hat.Tension band (11; 11 ') has at least the same strength as the seat belt (7; 7').
2. Gurtstraffer nach Anspruch 1, dadurch gekennzeichnet, daß das flexible Zugband (11; 11 ') aus demselben Material wie das Gurtband des2. Belt tensioner according to claim 1, characterized in that the flexible tension band (11; 11 ') made of the same material as the webbing
Sicherheitsgurtes (7; 7') besteht.Seat belt (7; 7 ') exists.
3. Gurtstraffer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das flexible Zugband (11) einstückig mit dem Sicherheitsgurt (7) verbunden ist.3. Belt tensioner according to claim 1 or 2, characterized in that the flexible drawstring (11) is integrally connected to the seat belt (7).
4. Gurtstraffer nach Anspruch 3, dadurch gekennzeichnet, daß das flexible Zugband (11) durch Einfalten von freien, seitlichen Rändern (9) des Sicherheitsgurtes (7) an dessen freiem, dem Antrieb zugeordne- ten Ende und durch Verkleben oder Vernähen der umgefalteten Ränder (9) gebildet ist.4. belt tensioner according to claim 3, characterized in that the flexible drawstring (11) by folding free, lateral edges (9) of the seat belt (7) at its free, the drive-associated end and by gluing or sewing the folded edges (9) is formed.
5. Gurtstraffer nach Anspruch 4, dadurch gekennzeichnet, daß sich die freien Ränder (9) nach dem Einfalten überlappen.5. Belt tensioner according to claim 4, characterized in that the free edges (9) overlap after folding.
6. Gurtstraffer nach Anspruch 2, dadurch gekennzeichnet, daß das flexible Zugband (11 ') ein schmales Gurtband ist.6. Belt tensioner according to claim 2, characterized in that the flexible tension band (11 ') is a narrow belt band.
7. Gurtstraffer nach Anspruch 6, dadurch gekennzeichnet, daß die freien, seitlichen Ränder (9') des Sicherheitsgurtes (7') an dessen freiem, dem Antrieb zugeordneten Ende so eingeschlagen werden, daß jeder eingeschlagene Rand (9') dreiecksförmig ist und daß der Sicherheitsgurt (7') bis zum Erreichen der Breite des Zugbandes (11') zu seinem freien Ende hin gleichmäßig schmäler wird.7. Belt tensioner according to claim 6, characterized in that the free, lateral edges (9 ') of the seat belt (7') on it free end, assigned to the drive, are turned in such a way that each edge (9 ') is triangular and that the seat belt (7') becomes even narrower towards its free end until the width of the tension band (11 ') is reached.
8. Gurtstraffer nach Anspruch 7, dadurch gekennzeichnet, daß sich die eingeschlagenen Ränder (9') unter Bildung einer Tasche überlappen und daß in diese Tasche das Zugband (11 ') eingeführt ist.8. belt tensioner according to claim 7, characterized in that the folded edges (9 ') overlap to form a pocket and that the drawstring (11') is inserted into this pocket.
9. Gurtstraffer nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß das schmale Gurtband durch Nähen mit dem freien Ende des Sicherheitsgurtes (7) verbunden ist.9. Belt tensioner according to one of claims 5 to 8, characterized in that the narrow belt strap is connected by sewing to the free end of the seat belt (7).
10. Gurtstraffer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Zugband (11; 11') aus flexiblem Material ist und eine Breite von ca. 35 bis 50 % der Breite des Sicherheitsgurtes (7; 7') aufweist.10. Belt tensioner according to one of the preceding claims, characterized in that the tension band (11; 11 ') is made of flexible material and has a width of approximately 35 to 50% of the width of the seat belt (7; 7').
11. Gurtstraffer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das flexible Zugband (11; 11') im Einzugsbereich des Gurtstraffers gleiche Breite und Dicke aufweist.11. Belt tensioner according to one of the preceding claims, characterized in that the flexible tension band (11; 11 ') has the same width and thickness in the feed area of the belt tensioner.
12. Gurtstraffer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Spulenwelle (5) direkt mit dem Rotations- antrieb (3) gekoppelt ist.12. Belt tensioner according to one of the preceding claims, characterized in that the spool shaft (5) is directly coupled to the rotary drive (3).
13. Gurtstraffer nach Anspruch 12, dadurch gekennzeichnet, daß die Spulenwelle (5) starr mit dem Rotationsantrieb (3) gekoppelt ist.13. Belt tensioner according to claim 12, characterized in that the spool shaft (5) is rigidly coupled to the rotary drive (3).
14. Gurtstraffer nach einem der vorstehenden Ansprüche, gekennzeichnet durch eine Einrichtung, die nach Aktivierung ein Wiederausziehen des Sicherheitsgurtes (7) verhindert.14. Belt tensioner according to one of the preceding claims, characterized by a device which, after activation, prevents the safety belt (7) from being pulled out again.
15. Gurtstraffer nach einem der Ansprüche 1 bis 13, gekenn- zeichnet durch eine Einrichtung, die nach Aktivierung ein15. Belt tensioner according to one of claims 1 to 13, characterized by a device which, after activation, a
Wiederausziehen des Sicherheitsgurtes (7) unter Begrenzung der aufzubringenden Kraft zuläßt. Re-pulling out the seat belt (7) while limiting the force to be applied.
16. Gurtstraffer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Rotationsantrieb als Rotationskolbenantrieb ausgebildet ist. 16. Belt tensioner according to one of the preceding claims, characterized in that the rotary drive is designed as a rotary piston drive.
PCT/EP1998/006942 1997-11-03 1998-11-03 Belt tensioner with a pyrotechnic rotation drive mechanism WO1999022969A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29719496.8 1997-11-03
DE29719496U DE29719496U1 (en) 1997-11-03 1997-11-03 Belt tensioners with pyrotechnic rotary drive

Publications (1)

Publication Number Publication Date
WO1999022969A1 true WO1999022969A1 (en) 1999-05-14

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PCT/EP1998/006942 WO1999022969A1 (en) 1997-11-03 1998-11-03 Belt tensioner with a pyrotechnic rotation drive mechanism

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DE (1) DE29719496U1 (en)
WO (1) WO1999022969A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1288087A2 (en) * 2001-08-23 2003-03-05 Breed Automative Technology, Inc. Seat belt system with a belt tensioner

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29806199U1 (en) * 1998-04-03 1998-08-27 TRW Occupant Restraint Systems GmbH & Co. KG, 73553 Alfdorf Belt tensioners with linear drive
DE102017118756A1 (en) * 2017-08-17 2019-02-21 Trw Automotive Gmbh Belt retractor and method for manufacturing a belt retractor

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DE2364982A1 (en) * 1972-12-28 1974-07-11 Takata Kojyo Co WIDTH-VARIABLE BELT, IN PARTICULAR SAFETY BELT
US3942819A (en) * 1972-05-12 1976-03-09 Volkswagenwerk Aktiengesellschaft Safety belt tensioning device
DE2720814A1 (en) * 1977-05-09 1978-11-23 Zinser Maschinenbau Kg Vehicle seat-belt with different width sections - has narrower section fitted with retractor and lock plate attachable to floor anchor
DE3119177A1 (en) * 1981-05-14 1982-12-09 Hans-Hellmut Ing.(grad.) 2061 Sülfeld Ernst Seat belt
DE3624155A1 (en) * 1986-07-17 1988-02-04 Daimler Benz Ag Safety belt for vehicles, especially cars
EP0451492A1 (en) * 1990-04-12 1991-10-16 TRW Occupant Restraint Systems GmbH Device for anchoring the safety belt end on the vehicle superstructure
DE29710827U1 (en) * 1997-06-20 1997-10-23 Trw Occupant Restraint Systems Gmbh, 73551 Alfdorf Belt tensioners

Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
US3942819A (en) * 1972-05-12 1976-03-09 Volkswagenwerk Aktiengesellschaft Safety belt tensioning device
DE2364982A1 (en) * 1972-12-28 1974-07-11 Takata Kojyo Co WIDTH-VARIABLE BELT, IN PARTICULAR SAFETY BELT
DE2720814A1 (en) * 1977-05-09 1978-11-23 Zinser Maschinenbau Kg Vehicle seat-belt with different width sections - has narrower section fitted with retractor and lock plate attachable to floor anchor
DE3119177A1 (en) * 1981-05-14 1982-12-09 Hans-Hellmut Ing.(grad.) 2061 Sülfeld Ernst Seat belt
DE3624155A1 (en) * 1986-07-17 1988-02-04 Daimler Benz Ag Safety belt for vehicles, especially cars
EP0451492A1 (en) * 1990-04-12 1991-10-16 TRW Occupant Restraint Systems GmbH Device for anchoring the safety belt end on the vehicle superstructure
DE29710827U1 (en) * 1997-06-20 1997-10-23 Trw Occupant Restraint Systems Gmbh, 73551 Alfdorf Belt tensioners

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1288087A2 (en) * 2001-08-23 2003-03-05 Breed Automative Technology, Inc. Seat belt system with a belt tensioner
EP1288087A3 (en) * 2001-08-23 2003-04-02 Breed Automative Technology, Inc. Seat belt system with a belt tensioner
US6688646B2 (en) 2001-08-23 2004-02-10 Breed Automotive Technology, Inc. Seat belt system with a belt tensioner

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