EP0079835B1 - Sicherheitsgurtschnalle, insbesondere für Kraftfahrzeuge - Google Patents

Sicherheitsgurtschnalle, insbesondere für Kraftfahrzeuge Download PDF

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Publication number
EP0079835B1
EP0079835B1 EP19820402075 EP82402075A EP0079835B1 EP 0079835 B1 EP0079835 B1 EP 0079835B1 EP 19820402075 EP19820402075 EP 19820402075 EP 82402075 A EP82402075 A EP 82402075A EP 0079835 B1 EP0079835 B1 EP 0079835B1
Authority
EP
European Patent Office
Prior art keywords
bolt
buckle
locking element
branches
buckle according
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
EP19820402075
Other languages
English (en)
French (fr)
Other versions
EP0079835A2 (de
EP0079835A3 (en
Inventor
Gérard Escaravage
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aciers et Outillage Peugeot SA
Original Assignee
Aciers et Outillage Peugeot SA
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 Aciers et Outillage Peugeot SA filed Critical Aciers et Outillage Peugeot SA
Publication of EP0079835A2 publication Critical patent/EP0079835A2/de
Publication of EP0079835A3 publication Critical patent/EP0079835A3/fr
Application granted granted Critical
Publication of EP0079835B1 publication Critical patent/EP0079835B1/de
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503—Safety buckles
    • A44B11/2507—Safety buckles actuated by a push-button
    • A44B11/2523—Safety buckles actuated by a push-button acting parallel to the main plane of the buckle and in the same direction as the fastening action

Definitions

  • the present invention relates to devices intended to retain a passenger in a motor vehicle in his seat in the event of sudden deceleration thereof, for example during an emergency braking or a collision. More particularly, the invention relates to a loop which in a device of the type indicated is intended to removably attach a strand of a safety strap to a fixed point on the vehicle body, by means of a tongue forming lock bolt.
  • These known loops include a housing in which is placed a bracket in the form of a stirrup which is intended to be fixed to a fixed retaining means relative to the body of the vehicle and which defines between its wings, a lane for the bolt emerging at one end of this stirrup, the loop further comprising a locking member mounted oscillating in the stirrup around an axis which is perpendicular to the wings of this stirrup, as well as a stop member mounted sliding in these wings and erasable by means of a control button, against the action of an elastic return device.
  • the bolt is retained in the loop by a projecting part of the locking member which prevents the bolt from being withdrawn from the guide passage into which it enters, for example by entering an opening made in the bolt.
  • this projecting part comes to cooperate with a stop edge formed in the bottom of the support stirrup, possibly by elastic deformation of the axis of oscillation of the locking member in the stirrup, which makes it possible to obtain a high efficiency of the buckle and a considerable retaining force of the bolt, despite the simplicity and the small dimensions of the buckle.
  • this construction requires compliance with fairly tight tolerances during manufacture.
  • the main object of the invention is therefore to improve the loop of the prior art listed above, in particular by creating a smaller and lighter loop, the manufacture of which can be undertaken without respecting tight tolerances.
  • the subject of the invention is a loop of the kind defined above which is characterized in that it further comprises locking means by bolt wedge effect in the guide passage against the internal surface of the 'soul of the stirrup, these locking means cooperating with an active inclined surface formed on said locking member.
  • the blocking by wedge effect results in the jamming of the bolt in the buckle with an efficiency all the greater as the pulling force on the strap is greater (in the event of sudden braking or a violent shock , for example).
  • the relative position of the parts which are brought into play to achieve the wedge effect is specific for each loop, which in fact leads to a catch-up by construction of the manufacturing tolerances inherent in these parts.
  • the loop can be produced with less precision while having a better blocking efficiency than that which could be obtained with a loop constructed according to the aforementioned prior art.
  • This improved efficiency allows, ultimately, for a force limit on the given strap, to reduce the size of the parts and in particular to reduce the width of the stirrup by about half compared to the aforementioned conventional loop.
  • the locking means comprise a roller of constant circular section which by its surface of revolution is intended to come into contact on the one hand with the bolt to hold it against the inner surface of the core of the stirrup, and on the other hand, with the active inclined surface of the locking member.
  • the bolt has at least in one of its large faces a profiled recess in which penetrate the locking means by wedge effect.
  • this profiled recess of the bolt has an active surface of the same inclination as the active surface of the locking member in the locked position of the bolt, said active surfaces forming a predetermined angle between them by converging the towards each other in the direction of ejection of the bolt from the loop.
  • This loop comprises a support 1 in the shape of a stirrup having a bottom 1 a and two wings 1 b and 1 c.
  • a fixing lug 2 reinforced by lateral fallen edges 3 extending in the general plane of the wings 1 b and 1 c, and provided with a central orifice 4.
  • a retaining means 5 which can be a "peduncle” which is the member attaching the loop to the floor of the vehicle for example.
  • this retaining means can also be a strand of strap or any other similar member.
  • the retaining means is pierced with an orifice 6 and is covered with a fixing plate 7 also pierced with an orifice 8 and provided with lateral notches 9 which adapt to the staircase shape of the edges 3 of the extension 2.
  • a rivet 10 is intended to pass through the orifices 4, 6 and 8 when they are aligned in order to rigidly fix the loop with the retaining means 5.
  • Each of the wings 1 b and 1 c has at the front an incision 1 d in the form of a staircase and delimiting a portion of wing 1 e deformed inwards to reduce the spacing of the stirrup at this point. .
  • the lower edge 1f of each of these deformed portions delimits a guide passage 11 in the support 1 into which the tongue-shaped part 12 of the latch P can be inserted.
  • the deformed portions 1e each have a orifice 1a, the two orifices being aligned and intended to receive a hinge pin 13 which therefore extends perpendicular to the wings 1b and 1c of the support.
  • Each of the wings 1b and 1c also presents an elongated lumen 1h which extends parallel to the bottom 1a of the stirrup and in which a pin 14 can slide.
  • Each of the wings also has, towards the rear, an orifice 1 i, the two aligned orifices thus formed being intended to receive a second articulation pin 15.
  • the bottom 1a of the stirrup has a roughly T-shaped cutout 16, the longest branch of which extends parallel to the wings of the stirrup.
  • the loop also includes a locking member 17 which has roughly the shape of a C and which has a concavity 17a, the bottom of which constitutes an active planar surface 17b.
  • This locking member is also provided with a hole 17c for the passage of the pin 13 by means of which this locking member 17 is therefore articulated in the support 1.
  • the locking member 17 has an unlocking heel 17d whose role will be explained below.
  • the locking member 17 is mounted between the wings 18a and 18b of a bracing member 18 which is carried by the pin 13 passing through aligned holes 18c provided in these wings 18a and 18b. These are joined together by a connection plate 18d, the assembly of this bracing member being preferably made of a molded plastic.
  • An ejection member 19 is intended to slide from front to rear or vice versa on the bottom 1a of the stirrup while being guided in this movement by means of a guide tab 19a in the form of an inverted T and which is adapted to penetrate in the T-shaped hole 16 made in the bottom 1 a.
  • This ejection member 19 has the general shape of a plate whose front edge 19b is hollowed out to adapt to the shape of the front edge 12a of the bolt P.
  • the opposite edge of the plate has a notch 19c in which can penetrate a branch 20a of an ejection spring 20.
  • This is of the elastic steel wire type and it comprises, outside the branch 20a, a central part 20b constituted by a few coiled turns, part which ends in a second branch 20c generally extending in opposite direction with respect to to branch 20a of this spring.
  • the central part 20b is engaged on the spindle 15 while being housed in a cavity 21 a (see fig. 1) of a lever 21 which is also engaged on the spindle 15 between the wings 1 b and 1 c of the stirrup and which comprises a central part 21 a of support pierced with aligned holes 21 b through which the pin 15 can pass to ensure the articulation of this lever.
  • This comprises a first branch 21c providing a guiding function and pierced with an oblong opening 21d, while the opposite branch 21 e is in the form of an unlocking spout 21 e intended to come into contact with the heel 17d of the locking member 17, as will appear later.
  • the opening 21 d of the lever 21 is crossed by the tail 22a of a pusher 22 which has the general shape of a hammer, the transverse part of which is produced in the form of a claw 22b which can be engaged elastically on the pin 14
  • a helical spring 23 is engaged on the tail 22a while being trapped between the branch 21c of the lever 21 and the claw 22b.
  • the loop also has a button control 24 which is mounted sliding and straddling the wings 1b and 1c of the support 1.
  • This button has lateral wings 24a and 24b each having at the rear a notch 24c intended to be engaged on a corresponding end of the pin 14 as well as a cavity 24d in which the corresponding end of the pin 13 can be engaged for guiding this button.
  • the latter also includes holding cells 24e of two springs 25 for recalling the button position outwards, these springs being engaged on lugs 1 formed at the front on the wings of the support 1.
  • the loop finally comprises wedge blocking means which, in the embodiment shown, are formed by a roller 26 of constant circular section. This roller is housed in the space delimited by the concavity 17a of the locking member 17.
  • the bolt P has in its tongue 12, an imprint 12b whose profile has in cross section of the tongue 12, a flat inclined surface 12c and a rounded surface 12d of circular section and whose radius is identical to that of the roller 26 .
  • the planar surface 12c When the bolt P is locked in the loop, the planar surface 12c has an inclination which is identical to that of the active planar surface 17b of the locking member 17, it being understood that the angles of inclination of these surfaces are not not identical. On the contrary, in this position of the bolt P, these surfaces converge towards the front by making a determined angle with respect to the general plane of the bottom 1 a of the support 1.
  • the entire loop can be housed in a housing 27, made of plastic, for example, and produced from two half-shells assembled according to a joint plane which is parallel to that of the bottom of the support 1.
  • FIG. 7 schematically represents the loop just described in the locked configuration, that is to say when the bolt P is inserted in the guide passage 11 delimited by the support and that a traction T of low value is exerted on the latch by the strap, which can occur during normal braking of the vehicle or when it is subjected to a slight impact.
  • the force T is exerted on the bolt by the strap because the passenger retained by the latter on his seat tends to pull the bolt P out of the loop due to the inertia effect which occurs when the vehicle is decelerated.
  • the force T is compensated by the jamming effect of the roller 26 in the following manner.
  • the bolt undergoes two combined actions which tend to counteract the force T. It is first of all the friction force N ⁇ 1 ( ⁇ 1 representing the angle of friction of the bolt on the bottom 1 a of the support of the Next, the roller 26 exerts a force G on the flat surface 12c of the imprint 12b of this bolt P and this results in a friction force G ⁇ 2, (p 2 being the angle of friction of the roller on the bolt P.
  • the roller 26 must be retained by the locking member 17 by an opposing force G1 which originates at the point of contact between the roller 26 and the planar active surface 17b of the locking member 17.
  • This force G1 generates a friction force G1 ⁇ 3 ( ⁇ 3 being the angle of friction between the roller 26 and the active surface 17b of the locking member) and it follows that the locking member 17 tends to turn around the spindle 13 counterclockwise with a moment which is equal to the product of the resultant R and the distance h from it with respect to the axis of the hinge pin 13 .
  • the resultant R is counterbalanced on the one hand by the reaction A exerted by this pin on the locking member and on the other hand by the reaction generated by the application of the latter against the pin 14 (force g with force of friction g ⁇ 4, ⁇ 4 being the coefficient of friction between the pin and the locking member.
  • the transmission of force G on the locking member 17 results from a wedge effect which is generated due to the inclination of an angle a of the planar surface 17b of the concavity 17a of the locking member 17 relative to the general plane of the bottom 1a of the support 1.
  • the bolt present in the cavity 12b, the inclined surface 12c, arrangement which is preferred to obtain blocking security and maximum operating efficiency of the loop.
  • the surface 12c is inclined at an angle relative to the general plane of the bottom 1a of the support 1 with a> ⁇ . As a result, the surfaces 17b and 12c converge forward.
  • the bolt can have imprints of various shapes or even include a hole through it right through.
  • FIG. 8 represents the case of a collision in which the force T exerted on the bolt can be very large (to fix ideas of the order of 1500 kg).
  • the direction of the force G n of the roller on the bolt then tends to change so that for a certain value of the force T i , the force G n is transformed into a force G with a friction force G ⁇ 3 'whose the R component; then has a direction which passes below the axis of articulation of the spindle 13, that is to say on the other side with respect to the direction of the resultant R ⁇ . It can therefore be seen that under these conditions, the assembly is self-locked and the pin 14 no longer intervenes in operation.
  • FIGS. 9A to 9F We will now examine FIGS. 9A to 9F to describe in detail the operation during the introduction of the bolt and when the buckle is released.
  • the roller 26 arrives at the end of the concavity of the locking member 17.
  • the bolt continues its introduction, slides under the roller, pushes the member again ejection until the notch formed on the bolt P is under the roller which is installed there pushed by the locking member 17 still under the action of the pin 14 (fig. 9D).
  • Fig. 10 shows the tongue 12A of a bolt PA in which there is provided an imprint 28 in each face of this tongue.
  • This imprint is of cylindrical shape whose radius is at least equal to that of the circular section of the roller 26.
  • Fig. 11 shows a bolt PB comprising two imprints 29 on either side of the large faces of its tongue 12B, the shape of these imprints being identical to those shown in the previous figures.
  • the PC bolt of fig. 12 has a tongue 12c in which a simple square hole 30 has been made, the transverse edges of which come into contact with the roller 26. It should be noted that the bolts PA to PC of FIGS. 10 to 12 can be used indifferently in both directions .
  • the variant of figs. 13 and 14 makes it possible to use a bolt PD, the tongue 12d of which has indentations 31 formed in the parallel edges of this tongue.
  • the support comprises a guide passage 32 formed in the bottom 33 of a support 34 by a deformation of U-shaped section. This variant makes it possible to further reduce the width of the loop while benefiting from all the advantages which have been described above.
  • the preferred embodiment described above comprises a roller of constant circular section.
  • the invention is not limited to such a wedge blocking means.
  • other bodies with an external rounded surface can be used, such as a ball, a barrel-shaped member, etc.

Landscapes

  • Automotive Seat Belt Assembly (AREA)

Claims (13)

1. Schnalle für Sicherheitsgurt mit einem Gehäuse (27), in welchem ein Träger (1) von Bügelform angeordnet ist, der dazu bestimmt ist, an einem Haltemittel (5) befestigt zu werden, das seinerseits fest bezüglich der Fahrzeugkarosserie ist und welcher zwischen seinen Schenkeln (1 b, 1 c) einen Führungskanal (11) für den Riegel (P), der an einem Ende dieses Bügels mündet, bildet, wobei die Schnalle im übrigen ein Verriegelungsorgan (17 umfasst, das verschwenkend im Bügel (1) um eine Achse gelagert ist, die senkrecht zu den Schenkeln (1 b, 1c) dieses Bügels ist sowie mit einem Halteorgan (14), das gleitverschieblich in diesen Schenkeln und mittels eines Betätigungsknopfes (24) entgegen der Wirkung einer elastischen Rückstefleinrichtung (20, 23) rückstellbar ist, gekennzeichnet im übrigen durch Einrichtungen (26) zur Sperrung des Riegels durch Keilwirkung im Führungskanal (11) gegen die Innenfläche des Bodens (1 a) des Bügels (1), wobei diese Sperreinrichtung mit einer aktiven geneigten Fläche (17b) zusammenwirken, die auf diesem Verriegelungsorgan (17) vorgesehen ist.
2. Schnalle nach Anspruch 1, dadurch gekennzeichnet, dass die Sperreinrichtungen ein Element (26) umfassen, das in seinen Kontaktzonen mit dem Riegel (P) und dem Verriegelungsorgan (17) abgerundete Oberflächenteile aufweist, die dazu bestimmt sind, jeweils in Kontakt einerseits mit dem Riegel (P), um diesen gegen die Innenfläche des Bodens (1 a) des Bügels (1) zu drükken und andererseits mit der geneigten aktiven Fläche (17b) des Verriegelungsorgans (17) zu kommen.
3. Schnalle nach Anspruch 2, dadurch gekennzeichnet, dass der Riegel (P) wenigstens eine profilierte Ausnehmung (12b) aufweist, in welche die Sperreinrichtungen (26) vermittels Keileffekt eindringen.
4. Schnalle nach Anspruch 2, dadurch gekennzeichnet, dass die profilierte Ausnehmung (12b) des Riegels (P) eine aktive Fläche (12c) gleicher Neigung wie die aktive Fläche (17b) des Verriegelungsorgans (17) in gesperrter Lage des Riegels (P) aufweist, wobei diese aktiven Flächen (12c, 12b) einen bestimmten Winkel (a-ß) untereinander bilden, indem sie gegeneinander in Auswurfrichtung des Riegels (P) der Schnalle konvergieren.
5. Schnalle nach Anspruch 3, dadurch gekennzeichnet, dass das Profil dieser Ausnehmung (28) des Riegels (PA) ein Zylinderteil ist.
6. Schnalle nach Anspruch 3, dadurch gekennzeichnet, dass die Ausnehmung (30) des Riegels (PC) ein durchgehendes Loch ist.
7. Schnalle nach einem der Ansprüche 2 bis 5, deren Riegel (PA, PB) eine Zunge (12A, 12B) aufweist, die dazu bestimmt ist, in diesen Führungskanal (11) eingeführt zu werden, dadurch gekennzeichnet, dass eine Ausnehmung (28, 29) in jeder der grossen Flächen der Zunge (12A, 12B) vorgesehen ist.
8. Schnalle nach einem der Ansprüche 2 bis 5, deren Riegel (PD) eine Zunge (12D) aufweist, die dazu bestimmt ist, in den Führungskanal (11) eingeführt zu werden, dadurch gekennzeichnet, dass eine Ausnehmung (31) in einem oder den beiden sich gegenüberstehenden Rändern der Zunge (12D) vorgesehen ist, um hochkant in den Führungskanal (32) eingeführt zu werden,
9. Schnalle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass diese Sperreinrichtungen eine Rolle (26) konstanten kreisförmigen Querschnitts umfassen.
10. Schnalle nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Verriegelungsorgan (17) in etwa C-förmige Gestalt aufweist, wobei in der Konkavität (17a) hiervon diese aktive Fläche (17b) vorgesehen ist und dieses Verriegelungsorgan von einer Gelenkspindel (13) durchsetzt ist, welche in die Schenkel (1 b, 1c) des Bügels (1) nahe dessen vorderen Rändern greift.
11. Schnalle nach Anspruch 10, dadurch gekennzeichnet, dass das Verriegelungsorgan (17) eine entsperrende Klinke (17d) aufweist und dass im übrigen ein verschwenkbar zwischen den Schenkeln (1 b, 1c) des Bügels (1 d) um eine Achse parallel zur Schwenkachse des Verriegelungsorgans gelagerter Hebel (21) vorgesehen ist, der eine Nase (21 e) aufweist, die dazu bestimmt ist, in Kontakt mit der Klinke (17d) des Verriegelungsorgans (17) zu kommen, wenn der Betätigungsknopf (24) ausgelöst wird.
12. Schnalle nach Anspruch 11, dadurch gekennzeichnet, dass eine Rückstellfeder (20) diesem Hebel (21) zugeordnet ist, um ihn in eine Stellung zu beaufschlagen, in der die Nase (21 e) vom Verriegelungsorgan (17) entfernt wird und dass diese Feder (20) gleichzeitig mit einem Organ (19) zum Auswerfen des Riegels (P) zusammenwirkt, wobei dieses Auswerferorgan gleitverschieblich im Boden (1 a) des Bügels gelagert ist und von dieser Feder derart beaufschlagt ist, dass er den Riegel (P) aus dem Führungskanal (11), wenn die Schnalle freigegeben wird, drückt.
13. Schnalle nach Anspruch 12, wobei dieses Halteorgan (14) ein Stift ist, der gleitverschieblich in Schlitzen (1 h) gelagert ist, die jeweils in den Schenkeln (1 b, 1c) des Bügels (1) parallel zum Führungskanal (11) ausgespart sind, wobei dieses Halteorgan (14) fest mit einem Drücker (22) verbunden ist, der elastisch entgegen der Wirkung der Entsperrung der Schnalle beaufschlagt wird, die durch den Betätigungsknopf (24) herbeiführbar ist, dadurch gekennzeichnet, dass dieser Drücker (22) mit einem Führungsendstück (22a) versehen ist, welches einen der Schenkel (21 c) dieses Hebels (21) durchsetzt.
EP19820402075 1981-11-18 1982-11-12 Sicherheitsgurtschnalle, insbesondere für Kraftfahrzeuge Expired EP0079835B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8121557 1981-11-18
FR8121557A FR2516360A1 (fr) 1981-11-18 1981-11-18 Boucle de ceinture de securite notamment pour vehicule automobile

Publications (3)

Publication Number Publication Date
EP0079835A2 EP0079835A2 (de) 1983-05-25
EP0079835A3 EP0079835A3 (en) 1984-03-28
EP0079835B1 true EP0079835B1 (de) 1986-02-19

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EP19820402075 Expired EP0079835B1 (de) 1981-11-18 1982-11-12 Sicherheitsgurtschnalle, insbesondere für Kraftfahrzeuge

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EP (1) EP0079835B1 (de)
DE (1) DE3269235D1 (de)
FR (1) FR2516360A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4416138C2 (de) * 1994-05-06 2002-06-13 Trw Repa Gmbh Verschluß für Sicherheitsgurte
JP3809007B2 (ja) * 1998-03-25 2006-08-16 タカタ株式会社 バックル
DE19858716C1 (de) * 1998-12-18 2000-05-18 Breed Automotive Tech Verschluß für einen Sicherheitsgurt
JP2001080456A (ja) * 1999-09-14 2001-03-27 Takata Corp バックル

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2178731B1 (de) * 1961-10-04 1975-03-21 Ferodo Sa
US3152374A (en) * 1962-02-08 1964-10-13 Kenneth W Round Safety belt buckle
DE2104900A1 (de) * 1971-02-03 1972-08-10 Fohl, Artur, 7061 Haubersbronn Verschluß für Sicherheitsgurte
FR2412283A1 (fr) * 1977-12-21 1979-07-20 Boudot Georges Boucle pour ceinture de securite
FR2423177A1 (fr) * 1978-04-17 1979-11-16 Sabelt Spa Boucle pour ceintures de securite
DE2903230A1 (de) * 1979-01-29 1980-07-31 Holger Seel Sicherheitsgurtverschluss

Also Published As

Publication number Publication date
EP0079835A2 (de) 1983-05-25
FR2516360B1 (de) 1984-06-29
EP0079835A3 (en) 1984-03-28
FR2516360A1 (fr) 1983-05-20
DE3269235D1 (en) 1986-03-27

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