WO1996020853A1 - Force-limiting device especially for safety belts - Google Patents

Force-limiting device especially for safety belts Download PDF

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Publication number
WO1996020853A1
WO1996020853A1 PCT/FR1995/001707 FR9501707W WO9620853A1 WO 1996020853 A1 WO1996020853 A1 WO 1996020853A1 FR 9501707 W FR9501707 W FR 9501707W WO 9620853 A1 WO9620853 A1 WO 9620853A1
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WO
WIPO (PCT)
Prior art keywords
force
blade
guide surface
limiting device
force limiter
Prior art date
Application number
PCT/FR1995/001707
Other languages
French (fr)
Inventor
Richard Anette
Marc Espinosa
Didier Guilmin
Original Assignee
Regie Nationale Des Usines Renault
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 Regie Nationale Des Usines Renault filed Critical Regie Nationale Des Usines Renault
Priority to EP95943254A priority Critical patent/EP0800466A1/en
Priority to BR9510226A priority patent/BR9510226A/en
Publication of WO1996020853A1 publication Critical patent/WO1996020853A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
    • F16F7/128—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by the members, e.g. a flat strap, yielding through stretching, pulling apart
    • 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
    • B60R22/341—Belt retractors, e.g. reels comprising energy-absorbing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
    • F16F7/123—Deformation involving a bending action, e.g. strap moving through multiple rollers, folding of members

Definitions

  • the invention relates to a force limiting device, in particular for seat belts, comprising a mechanism for rewinding the belt strap, fixed at one of its ends to an anchoring wall and which is constituted by a metal blade, the ends are provided with fixing holes.
  • the publication BP-A-1170404 describes a device in which a metal blade is shaped in a sinusoidal succession of loops whose summits are joined by riveted plates. In this case, a tensile force exerted at the ends of the device exerts a shearing force on the rivets and a straightening of the metal blade.
  • the reaction exerted by the seat belt on the human body is thus maintained at a bearable level.
  • the publication FR-A-2168073 describes a force limiting device constituted by superimposed blade portions connected to one another by a fastener and by a fold, among which a blade is integral with reinforcement edges fixed to a structure carrier.
  • a force limiting device constituted by superimposed blade portions connected to one another by a fastener and by a fold, among which a blade is integral with reinforcement edges fixed to a structure carrier.
  • a force limiting device mounted on a seat belt makes it possible to obtain a predefined lengthening of the seat belt during the acceleration communicated to the occupant of the vehicle following a stop. brutal vehicle following a collision.
  • Such force limiters are necessarily linked directly to the seat belt strap, which poses a certain problem of integration on an existing belt model, in particular on a belt model provided with a mechanism for rewinding the strap.
  • the invention relates to a force limiting device applied by way of example to an existing seat belt in order to increase the performance of said belt.
  • the invention more particularly relates to a force limiter applied between an anchor point of the belt and a winding mechanism, so that the tensile force exerted on said limiter for its plastic deformation, generates a tension stress threshold of a thoracic strap tolerable by the thorax of the belt user.
  • the invention also relates to a force limiter whose deformation is made possible in the case where the winding mechanism is located in a housing of reduced space.
  • the blade is located in a housing in which a surface cooperates in guiding the movements of the winding mechanism under the action of the tensile force F.
  • the guide surface is connected to one end of the metal blade opposite the fixing lugs of said blade.
  • the guide surface is constituted by a stamped area of a bodywork element.
  • the guide surface has a concavity oriented in the direction of a median longitudinal plane of the vehicle.
  • FIG. 1 is a perspective representation of the limiter device.
  • FIG. 2 is a distorted representation of the limiter device, as a result of a controlled tear resulting from a tensile force imparted to a fixing end of said device.
  • FIG. 3 is a representative diagram of the elongation of the limiter as a function of the applied tensile force.
  • FIG. 4 schematically shows an example of application of the limiter device to a seat belt.
  • FIG. 5 shows the force limiter carrying a winding mechanism and located in a housing of the middle leg.
  • FIG. 6 shows the force limiter in situation in a housing of the middle leg after deformation of said force limiter and movement of the strap winder.
  • retractor will be used to define a retractor 2 for a strap 3 of a seat belt 4 which comprises an additional means for blocking said strap 3 at the outlet of said retractor 2.
  • the limiting device shown in Figures 1 and 2 is constituted by a portion of metal blade 10 2 mm thick on which the ends folded at right angles materialize fixing lugs 12, 12 'provided with receiving holes 13, 13' d 'fasteners to an anchor wall 15, shown in Figure 4, and to a support plate 48 of a winding mechanism 2 of the strap 3 of seat belt 4.
  • One end of the blade 10 opposite the fixing lugs 12 and 12 ' is shaped as a guide surface 17 for the movements of the winding mechanism 2 during the deformation of the force limiter under the action of a tensile force F.
  • Two parallel grooves 11, 11 ′ for controlling the tear of the blade 10 which open into holes 16, 16 ′ extend along said blade from priming notches 14, respectively constituted by two symmetrical localized notches at the junction of the fixing lugs 12, 12 '.
  • Belt 4 conventionally has:
  • a thoracic strap 41 which extends diagonally in service in front of the occupant of the seat 5 from an upper lateral anchor 43 situated above the occupant's shoulder towards a first lower median anchor 44.
  • a pelvis strap 42 which extends between said first lower median anchor 44 and a second lower lateral anchor 45.
  • a sliding connector means 46 which forms the transition between said straps 41, 42, intended to be connected to a locking box 47 associated with the first lower middle anchor 44.
  • the winding mechanism 2 of the strap 3 has a support plate 48 connected to a second lower lateral anchoring 49 via the force limiting device.
  • the fixing lugs 12 ′ are intended to be rigidly connected to the anchoring wall 15, such as a side flap reinforcement of a motor vehicle.
  • the mounting lug 12 is intended to be connected to the support plate 48 of the winding mechanism 2 of the strap 3 of a seat belt 4 associated with a seat 5 of the vehicle.
  • the blade 10 tears along the grooves 11, 11 'under the action of a tensile force F, substantially constant, communicated to the fixing lug
  • the distance made between the priming notches 14 and the holes 16, 16 ′ as well as the depth of the grooves 11, 11 ′ defines the value of the energy absorbed and therefore the limit value of the force applied by the strap 3 seat belt 4 on the occupant, during the tearing of the device, which is limited by the holes 16, 16 '.
  • section AB represents the initial loading of the force limiter up to the reference force FI (at zero displacement).
  • the start of the notch tear phase 14 is represented by point B.
  • the tear of the blade 10 with spacing of the parts 12, 12 * at constant force is illustrated by the plate BC of the diagram.
  • the section CD represents the final behavior law of the blade 10 when the tears reach the holes 16, 16 ′.
  • the winding mechanism 2 of the strap 3 is generally located in a housing 20 made in a bodywork element 30 such as a local reinforcement of the bodywork or on a wall thereof, or a center leg as shown in Figures 5 and 6.
  • the example described in FIG. 5 represents the force limiter located in a housing 20 produced at the base of the center leg 30.
  • the guide surface 17 of the movements of the reel 2 has a concavity 21 which is oriented towards a median longitudinal plane of the vehicle, which makes it possible to create an extraction ramp 22 directing the reel 2 out of its housing 20 during the deformation of the force limiter, as shown in FIG. 6.
  • FIG. 5 and 6 represent the guide surface 17 consisting of a stamped area 23 produced in the center leg, the blade 10 is then limited by the holes 16 and 16 ′ and therefore no longer carries said guide surface 17.

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

Abstract

Force-limiting device especially for safety belts comprising a device for retracting (2) the belt strap (3), integral with one of the ends of an anchoring wall (15). Said force-limiting device consists of a metal plate (10), its ends having securing lugs (12, 12') joined together by an intermediate connection which can be torn by a pulling force F transmitted to a securing lug (12) of said plate (10). The device is characterized in that said plate (10) is located in a housing (20), wherein a surface (17) cooperates in guiding the movement of the retracting device (2) produced by said pulling force F.

Description

DISPOSITIF LIMITEUR D'EFFORT NOTAMMENT POUR CEINTURES DE SECURITEEFFORT LIMITING DEVICE, PARTICULARLY FOR SEAT BELTS
L'invention concerne un dispositif limiteur d'effort notamment pour ceintures de sécurité comportant un mécanisme enrouleur de la sangle de ceinture, solidaire à l'une de ses extrémités d'une paroi d'ancrage et qui est constitué par une lame métallique dont les extrémités sont pourvues de trous de fixation.The invention relates to a force limiting device, in particular for seat belts, comprising a mechanism for rewinding the belt strap, fixed at one of its ends to an anchoring wall and which is constituted by a metal blade, the ends are provided with fixing holes.
La publication BP- A- 1170404 décrit un dispositif dans lequel une lame métallique est conformée en une succession sinusoïdale de boucles dont les sommets sont réunis par des plaques rivetées. Une force de traction exercée aux extrémités du dispositif exerce dans ce cas un effort de cisaillement des rivets et un redressement de la lame métallique.The publication BP-A-1170404 describes a device in which a metal blade is shaped in a sinusoidal succession of loops whose summits are joined by riveted plates. In this case, a tensile force exerted at the ends of the device exerts a shearing force on the rivets and a straightening of the metal blade.
La réaction exercée par la ceinture de sécurité sur le corps humain est ainsi maintenue à un niveau supportable.The reaction exerted by the seat belt on the human body is thus maintained at a bearable level.
La publication FR-A-2168073 décrit un dispositif limiteur d'effort constitué par des portions de lame superposées raccordées l'une à l'autre par une attache et par un pli parmi lesquelles une lame est solidaire de bords de renforcement fixés à une structure porteuse. Lorsqu'une extrémité de la lame est soumise à une traction, l'arrachement de l'attache autorise l'étire ent des portions de lame et une absorption correspondante d'énergie.The publication FR-A-2168073 describes a force limiting device constituted by superimposed blade portions connected to one another by a fastener and by a fold, among which a blade is integral with reinforcement edges fixed to a structure carrier. When one end of the blade is subjected to traction, the tearing of the fastener allows the stretching of the blade portions and a corresponding absorption of energy.
On sait qu'un dispositif limiteur d'effort monté sur une ceinture de sécurité permet d'obtenir un allongement, prédéfini, de la ceinture de sécurité au cours de l'accélération communiquée à l'occupant du véhicule à la suite d'un arrêt brutal du véhicule consécutif à une collision.It is known that a force limiting device mounted on a seat belt makes it possible to obtain a predefined lengthening of the seat belt during the acceleration communicated to the occupant of the vehicle following a stop. brutal vehicle following a collision.
De tels limiteurs d'effort sont obligatoirement liés directement à la sangle de ceinture de sécurité, ce qui pose certain problème d'intégration sur un modèle de ceinture existant, en particulier sur un modèle de ceinture muni d'un mécanisme enrouleur de la sangle. L'invention a pour objet un dispositif limiteur d'effort appliqué à titre d'exemple à une ceinture de sécurité existante dans le but d'accroître les performances de ladite ceinture.Such force limiters are necessarily linked directly to the seat belt strap, which poses a certain problem of integration on an existing belt model, in particular on a belt model provided with a mechanism for rewinding the strap. The invention relates to a force limiting device applied by way of example to an existing seat belt in order to increase the performance of said belt.
L'invention a plus particulièrement pour objet un limiteur de l'effort appliqué entre un point d'ancrage de la ceinture et un mécanisme enrouleur, de sorte que l'effort de traction exercé sur ledit limiteur en vue de sa déformation plastique, engendre un seuil d'effort de tension d'une sangle thoracique tolérable par le thorax de l'utilisateur de la ceinture.The invention more particularly relates to a force limiter applied between an anchor point of the belt and a winding mechanism, so that the tensile force exerted on said limiter for its plastic deformation, generates a tension stress threshold of a thoracic strap tolerable by the thorax of the belt user.
L'invention a également pour objet un limiteur d'effort dont la déformation est rendue possible dans le cas où le mécanisme enrouleur est situé dans un logement d'espace réduit.The invention also relates to a force limiter whose deformation is made possible in the case where the winding mechanism is located in a housing of reduced space.
Selon l'invention la lame est située dans un logement dans lequel une surface coopère au guidage des déplacements du mécanisme enrouleur sous l'action de l'effort de traction F.According to the invention, the blade is located in a housing in which a surface cooperates in guiding the movements of the winding mechanism under the action of the tensile force F.
Selon l'invention la surface de guidage est raccordée à une extrémité de la lame métallique opposée aux pattes de fixation de ladite lame.According to the invention, the guide surface is connected to one end of the metal blade opposite the fixing lugs of said blade.
Selon l'invention la surface de guidage est constituée par une zone emboutie d'un élément de carrosserie.According to the invention the guide surface is constituted by a stamped area of a bodywork element.
Selon l'invention la surface de guidage possède une concavité orientée en direction d'un plan longitudinal médian du véhicule.According to the invention, the guide surface has a concavity oriented in the direction of a median longitudinal plane of the vehicle.
D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description d'un exemple de réalisation du dispositif limiteur en référence au dessin annexé dans lequel :Other advantages and characteristics of the invention will appear on reading the description of an exemplary embodiment of the limiter device with reference to the appended drawing in which:
- la figure 1 est une représentation perspective du dispositif limiteur.- Figure 1 is a perspective representation of the limiter device.
- la figure 2 est une représentation déformée du dispositif limiteur, par suite d'un déchirement contrôlé résultant d'un effort de traction communiqué à une extrémité de fixation dudit dispositif.- Figure 2 is a distorted representation of the limiter device, as a result of a controlled tear resulting from a tensile force imparted to a fixing end of said device.
- la figure 3 est un diagramme représentatif de l'allongement du limiteur en fonction de l'effort de traction appliqué. - la figure 4 représente schématiquement un exemple d'application du dispositif limiteur à une ceinture de sécurité.- Figure 3 is a representative diagram of the elongation of the limiter as a function of the applied tensile force. - Figure 4 schematically shows an example of application of the limiter device to a seat belt.
- la figure 5 représente le limiteur d'effort portant un mécanisme enrouleur et situé dans un logement du pied milieu.- Figure 5 shows the force limiter carrying a winding mechanism and located in a housing of the middle leg.
- la figure 6 représente le limiteur d'effort en situation dans un logement du pied milieu après déformation dudit limiteur d'effort et déplacement de l'enrouleur de sangle.- Figure 6 shows the force limiter in situation in a housing of the middle leg after deformation of said force limiter and movement of the strap winder.
Dans la description qui suit, le terme "enrouleur" sera utilisé pour définir un enrouleur 2 de sangle 3 de ceinture de sécurité 4 qui comporte un moyen complémentaire de blocage de ladite sangle 3 à la sortie dudit enrouleur 2.In the description which follows, the term "retractor" will be used to define a retractor 2 for a strap 3 of a seat belt 4 which comprises an additional means for blocking said strap 3 at the outlet of said retractor 2.
Le dispositif limiteur représenté aux figures 1 et 2 est constitué par une portion de lame métallique 10 de 2 mm d'épaisseur sur laquelle les extrémités repliées en équerre matérialisent des pattes de fixation 12, 12' pourvues de trous de réception 13, 13' d'organes de fixation à une paroi d'ancrage 15, représenté à la figure 4, et à une platine support 48 d'un mécanisme enrouleur 2 de la sangle 3 de ceinture de sécurité 4.The limiting device shown in Figures 1 and 2 is constituted by a portion of metal blade 10 2 mm thick on which the ends folded at right angles materialize fixing lugs 12, 12 'provided with receiving holes 13, 13' d 'fasteners to an anchor wall 15, shown in Figure 4, and to a support plate 48 of a winding mechanism 2 of the strap 3 of seat belt 4.
Une extrémité de la lame 10 opposée aux pattes de fixation 12 et 12' est conformé en une surface de guidage 17 des déplacements du mécanisme enrouleur 2 lors de la déformation du limiteur d'effort sous l'action d'un effort de traction F.One end of the blade 10 opposite the fixing lugs 12 and 12 'is shaped as a guide surface 17 for the movements of the winding mechanism 2 during the deformation of the force limiter under the action of a tensile force F.
Deux rainures parallèles 11, 11 ' de contrôle de la déchirure de la lame 10 qui débouchent dans des perçages 16, 16' s'étendent le long de ladite lame à partir d'entailles d'amorçage 14, respectivement constitués de deux entailles symétriques localisées à la jonction des pattes de fixation 12, 12'.Two parallel grooves 11, 11 ′ for controlling the tear of the blade 10 which open into holes 16, 16 ′ extend along said blade from priming notches 14, respectively constituted by two symmetrical localized notches at the junction of the fixing lugs 12, 12 '.
La ceinture 4 possède de manière conventionnelle :Belt 4 conventionally has:
- une sangle thoracique 41 qui s'étend diagonalement en service devant l'occupant du siège 5 à partir d'un ancrage latéral supérieur 43 situé au- dessus de l'épaule de l'occupant vers un premier ancrage médian inférieur 44. - une sangle de bassin 42 qui s'étend entre ledit premier ancrage médian inférieur 44 et un deuxième ancrage latéral inférieur 45.a thoracic strap 41 which extends diagonally in service in front of the occupant of the seat 5 from an upper lateral anchor 43 situated above the occupant's shoulder towards a first lower median anchor 44. a pelvis strap 42 which extends between said first lower median anchor 44 and a second lower lateral anchor 45.
- un moyen connecteur 46 coulissant, qui forme la transition entre lesdites sangles 41, 42, destiné à être relié à un boîtier de verrouillage 47 associé au premier ancrage médian inférieur 44.- a sliding connector means 46, which forms the transition between said straps 41, 42, intended to be connected to a locking box 47 associated with the first lower middle anchor 44.
Le mécanisme enrouleur 2 de la sangle 3 possède une platine support 48 reliée à un deuxième ancrage latéral inférieur 49 par l'intermédiaire du dispositif limiteur d ' effort.The winding mechanism 2 of the strap 3 has a support plate 48 connected to a second lower lateral anchoring 49 via the force limiting device.
A cet effet les pattes de fixation 12' sont destinées à être reliées rigidement à la paroi d'ancrage 15, telle qu'un renfort de bavolet latéral d'un véhicule automobile. La patte de fixation 12 est destinée à être reliée à la platine support 48 du mécanisme enrouleur 2 de la sangle 3 d'une ceinture de sécurité 4 associée à un siège 5 du véhicule.To this end, the fixing lugs 12 ′ are intended to be rigidly connected to the anchoring wall 15, such as a side flap reinforcement of a motor vehicle. The mounting lug 12 is intended to be connected to the support plate 48 of the winding mechanism 2 of the strap 3 of a seat belt 4 associated with a seat 5 of the vehicle.
La lame 10 se déchire le long des rainures 11, 11' sous l'action d'un effort de traction F, sensiblement constant, communiqué à la patte de fixationThe blade 10 tears along the grooves 11, 11 'under the action of a tensile force F, substantially constant, communicated to the fixing lug
12, lorsque les pattes 12' sont rigidement reliées à la paroi 15.12, when the tabs 12 'are rigidly connected to the wall 15.
La distance réalisée entre les entailles d'amorçage 14 et les perçages 16, 16' ainsi que la profondeur des rainures 11, 11 ' définit la valeur de l'énergie absorbée et par conséquent la valeur limite de l'effort appliqué par la sangle 3 de ceinture de sécurité 4 sur l'occupant, pendant le déchirement du dispositif, lequel est limité par les perçages 16, 16' .The distance made between the priming notches 14 and the holes 16, 16 ′ as well as the depth of the grooves 11, 11 ′ defines the value of the energy absorbed and therefore the limit value of the force applied by the strap 3 seat belt 4 on the occupant, during the tearing of the device, which is limited by the holes 16, 16 '.
Le fonctionnement du limiteur apparaîtra plus clairement sur le diagramme de la figure 3.The operation of the limiter will appear more clearly on the diagram in Figure 3.
Sur ce diagramme le tronçon AB représente la mise en charge initiale du limiteur d'effort jusqu'à l'effort de référence FI (à zéro déplacement).On this diagram, the section AB represents the initial loading of the force limiter up to the reference force FI (at zero displacement).
Le début de la phase de la déchirure aux entailles 14 est représenté par le point B.The start of the notch tear phase 14 is represented by point B.
La déchirure de la lame 10 avec écartement des parties 12, 12* à effort constant est illustrée par le plateau BC du diagramme. Le tronçon CD représente la loi de comportement final de la lame 10 lorsque les déchirures atteignent les perçages 16, 16'.The tear of the blade 10 with spacing of the parts 12, 12 * at constant force is illustrated by the plate BC of the diagram. The section CD represents the final behavior law of the blade 10 when the tears reach the holes 16, 16 ′.
Le mécanisme enrouleur 2 de la sangle 3 est généralement situé dans un logement 20 réaliser dans un élément de carrosserie 30 tel qu'un renfort local de la carrosserie ou sur une paroi de celle-ci, ou un pied milieu comme représenté aux figures 5 et 6. L'exemple décrit à la figure 5 représente le limiteur d'effort situé dans un logement 20 réalisé à la base du pied milieu 30. Lors du déchirement du limiteur d'effort les déplacements de l'enrouleur 2 ne pouvant pas être compris dans le pied milieu 30 par insuffisance de place, ce dernier ayant une section large à la base qui évolue en s'affinant, il est donc nécessaire de faire sortir l'enrouleur 2 de son logement 20 lors desdits déplacements.The winding mechanism 2 of the strap 3 is generally located in a housing 20 made in a bodywork element 30 such as a local reinforcement of the bodywork or on a wall thereof, or a center leg as shown in Figures 5 and 6. The example described in FIG. 5 represents the force limiter located in a housing 20 produced at the base of the center leg 30. When the force limiter is torn, the movements of the reel 2 cannot be understood in the middle leg 30 due to insufficient space, the latter having a wide section at the base which evolves as it becomes thinner, it is therefore necessary to remove the reel 2 from its housing 20 during said movements.
Pour cela la surface de guidage 17 des déplacements de l'enrouleur 2 a une concavité 21 qui est orientée en direction d'un plan longitudinal médian du véhicule, ce qui permet de créer une rampe d'extraction 22 dirigeant l'enrouleur 2 hors de son logement 20 lors de la déformation du limiteur d'effort, tel que représenté à la figure 6.For this, the guide surface 17 of the movements of the reel 2 has a concavity 21 which is oriented towards a median longitudinal plane of the vehicle, which makes it possible to create an extraction ramp 22 directing the reel 2 out of its housing 20 during the deformation of the force limiter, as shown in FIG. 6.
Suivant la situation du limiteur d'effort dans le véhicule, la surface de guidage des déplacements de l'enrouleur 2 de la sangle 3 de ceinture de sécurité 4 peut être réalisé différemment de l'exemple décrit aux figures 1 et 2. Les figure 5 et 6 représentent la surface de guidage 17 constitué d'une zone emboutie 23 réalisé dans le pied milieu, la lame 10 est alors limitée par les perçages 16 et 16' et ne porte donc plus ladite surface de guidage 17.Depending on the situation of the force limiter in the vehicle, the surface for guiding the movements of the retractor 2 of the strap 3 of the seat belt 4 can be produced differently from the example described in FIGS. 1 and 2. FIG. 5 and 6 represent the guide surface 17 consisting of a stamped area 23 produced in the center leg, the blade 10 is then limited by the holes 16 and 16 ′ and therefore no longer carries said guide surface 17.
11 est possible le cas échéant d'ajouter une pièce auxiliaire, ayant la forme de la surface de guidage 17, dans le prolongement d'une extrémité de la lame 10 limitée par les perçages 16 et 16' et opposée aux pattes de fixationIt is possible, if necessary, to add an auxiliary part, having the shape of the guide surface 17, in the extension of one end of the blade 10 limited by the holes 16 and 16 ′ and opposite the fixing lugs.
12 et 12', permettant ainsi de créer une rampe d'extraction 22 du mécanisme enrouleur 2 sans avoir à créer d'embouti supplémentaire dans un élément de carrosserie. 12 and 12 ', thus making it possible to create an extraction ramp 22 of the winding mechanism 2 without having to create additional stamping in a bodywork element.

Claims

REVENDICATIONS
1) Limiteur d'effort notamment pour ceintures de sécurité comportant un mécanisme enrouleur (2) de la sangle (3) de ceinture, solidaire à l'une de ses extrémités d'une paroi d'ancrage (15) et qui est constitué par une lame métallique (10) dont des extrémités sont pourvues de pattes de fixation (12, 12') jointes l'une à l'autre par une liaison intermédiaire destructible par déchirement sous l'action d'un effort de traction F communiqué à une patte de fixation (12) de la lame (10), caractérisé par le fait que la lame (10) est située dans un logement (20) dans lequel une surface (17) coopère au guidage des déplacements du mécanisme enrouleur (2) sous l'action de l'effort de traction F.1) force limiter in particular for seat belts comprising a rewinding mechanism (2) of the belt strap (3), integral at one of its ends with an anchoring wall (15) and which is constituted by a metal blade (10), the ends of which are provided with fixing lugs (12, 12 ') joined to each other by an intermediate link which can be destroyed by tearing under the action of a tensile force F communicated to a blade mounting bracket (12), characterized in that the blade (10) is located in a housing (20) in which a surface (17) cooperates in guiding the movements of the winding mechanism (2) under the action of the tensile force F.
2) Limiteur d'effort selon la revendication 1, caractérisé par le fait que la surface de guidage (17) est raccordée à l'extrémité de la lame métallique (10) opposée aux pattes de fixation (12, 12') de ladite lame (10).2) force limiter according to claim 1, characterized in that the guide surface (17) is connected to the end of the metal blade (10) opposite the fixing lugs (12, 12 ') of said blade (10).
3) Limiteur d'effort selon la revendication 1 , caractérisé par le fait que la surface de guidage (17) est constitué par une zone embouti (23) d'un élément de carrosserie (30).3) force limiter according to claim 1, characterized in that the guide surface (17) is constituted by a stamped area (23) of a bodywork element (30).
4) Limiteur d'effort selon l'une quelconque des revendications, caractérisé par le fait que la surface de guidage (17) possède une concavité (21) orientée en direction d'un plan longitudinal médian du véhicule. 4) force limiter according to any one of claims, characterized in that the guide surface (17) has a concavity (21) oriented towards a longitudinal median plane of the vehicle.
PCT/FR1995/001707 1994-12-30 1995-12-21 Force-limiting device especially for safety belts WO1996020853A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95943254A EP0800466A1 (en) 1994-12-30 1995-12-21 Force-limiting device especially for safety belts
BR9510226A BR9510226A (en) 1994-12-30 1995-12-21 Stress-limiting device notably for seat belts

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9415916A FR2728848A1 (en) 1994-12-30 1994-12-30 EFFORT LIMITING DEVICE, PARTICULARLY FOR SEAT BELTS
FR94/15916 1994-12-30

Publications (1)

Publication Number Publication Date
WO1996020853A1 true WO1996020853A1 (en) 1996-07-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1995/001707 WO1996020853A1 (en) 1994-12-30 1995-12-21 Force-limiting device especially for safety belts

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EP (1) EP0800466A1 (en)
BR (1) BR9510226A (en)
FR (1) FR2728848A1 (en)
WO (1) WO1996020853A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444592A (en) * 2006-12-08 2008-06-11 Ford Global Tech Llc Energy absorbing anchor for child safety seats

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6394241B1 (en) * 1999-10-21 2002-05-28 Simula, Inc. Energy absorbing shear strip bender
FR2976879B1 (en) * 2011-06-21 2013-07-05 Renault Sa SAFETY BELT REEL BELT FASTENING ARRANGEMENT FOR A MOTOR VEHICLE SEAT

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2126086A1 (en) * 1971-05-26 1972-12-07 Daimler-Benz Ag, 7000 Stuttgart Energy-absorbing fastening, in particular for a seat belt in a motor vehicle
GB1390889A (en) * 1973-08-03 1975-04-16 Rolls Royce Motors Ltd Energy dissipation device
EP0404075A2 (en) * 1989-06-20 1990-12-27 Mazda Motor Corporation Safety belt apparatus for vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2126086A1 (en) * 1971-05-26 1972-12-07 Daimler-Benz Ag, 7000 Stuttgart Energy-absorbing fastening, in particular for a seat belt in a motor vehicle
GB1390889A (en) * 1973-08-03 1975-04-16 Rolls Royce Motors Ltd Energy dissipation device
EP0404075A2 (en) * 1989-06-20 1990-12-27 Mazda Motor Corporation Safety belt apparatus for vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444592A (en) * 2006-12-08 2008-06-11 Ford Global Tech Llc Energy absorbing anchor for child safety seats
US7658444B2 (en) 2006-12-08 2010-02-09 Ford Global Technologies, Llc Energy absorbing seat anchor restraint system for child safety seats
GB2444592B (en) * 2006-12-08 2011-06-22 Ford Global Tech Llc An energy absorbing seat anchor restraint system for child safety seats

Also Published As

Publication number Publication date
FR2728848B1 (en) 1997-02-28
EP0800466A1 (en) 1997-10-15
BR9510226A (en) 1997-11-04
FR2728848A1 (en) 1996-07-05

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