EP0413702B1 - Safety ski binding - Google Patents

Safety ski binding Download PDF

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Publication number
EP0413702B1
EP0413702B1 EP89904498A EP89904498A EP0413702B1 EP 0413702 B1 EP0413702 B1 EP 0413702B1 EP 89904498 A EP89904498 A EP 89904498A EP 89904498 A EP89904498 A EP 89904498A EP 0413702 B1 EP0413702 B1 EP 0413702B1
Authority
EP
European Patent Office
Prior art keywords
spring
clamp
heel
ski
ski boot
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 - Lifetime
Application number
EP89904498A
Other languages
German (de)
French (fr)
Other versions
EP0413702A1 (en
Inventor
Alois Rohrmoser
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.)
Varpat Patentverwertungs AG
Original Assignee
Varpat Patentverwertungs AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE3905293A external-priority patent/DE3905293C2/en
Application filed by Varpat Patentverwertungs AG filed Critical Varpat Patentverwertungs AG
Publication of EP0413702A1 publication Critical patent/EP0413702A1/en
Application granted granted Critical
Publication of EP0413702B1 publication Critical patent/EP0413702B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00Ski bindings
    • A63C9/08Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/085Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A63C9/08592Structure or making
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00Ski bindings
    • A63C9/007Systems preventing accumulation of forces on the binding when the ski is bending
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00Ski bindings
    • A63C9/08Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/085Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A63C9/08507Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable with a plurality of mobile jaws
    • A63C9/08521Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable with a plurality of mobile jaws pivoting about a vertical axis, e.g. side release
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00Ski bindings
    • A63C9/08Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/085Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A63C9/08535Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable with a mobile body or base or single jaw
    • A63C9/0855Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable with a mobile body or base or single jaw pivoting about a vertical axis
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00Ski bindings
    • A63C9/08Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/085Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A63C9/08557Details of the release mechanism
    • A63C9/08564Details of the release mechanism using cam or slide surface
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00Ski bindings
    • A63C9/08Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/085Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A63C9/08557Details of the release mechanism
    • A63C9/08578Details of the release mechanism using a plurality of biasing elements
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00Ski bindings
    • A63C9/22Arrangements for adjusting the toe-clamps

Definitions

  • the invention relates to a safety ski binding with the features specified in the preamble of claim 1.
  • a forerunner of a safety ski binding of this type is known from the German utility model DE-U-82 23 875.
  • both the front jaw and the heel jaws are guided in ski-fixed guides along the ski and are coupled to one another by a flexible connecting rail, so that they can be moved as a unit along the ski to optimize the skiing characteristics of the ski.
  • the toe piece can be locked in the desired binding position, while the heel piece remains freely movable to prevent unwanted stiffening of the ski in the binding area.
  • the sole holder of the heel shoe which engages the heel of the ski boot, is in turn movable relative to the connecting rail, which is firmly locked over the front shoe, and is pre-tensioned by a compression spring on the front shoe.
  • the compression spring ensures a constant contact pressure with which the ski shoe rests against the sole holder of the toe piece and thus for constant triggering conditions of a predetermined release torque of the swinging out and release of the ski shoe sole holder of the toe piece.
  • the aim is that the pivot axis of the ski boot essentially coincides with the shin axis in order to obtain predeterminable pivot radii of the front sole area and of the rear heel area.
  • the sole or heel holder of the heel shoe should guide the ski boot in such a way that it executes the pivoting movement around the shin axis.
  • the sole holder of the front jaw is usually designed as a fork jaw and guides the ski boot in its normal position on opposite sides in an approximately punctiform manner. Due to the kinematics of the pivoting movement of the ski boot and the sole holder which can be pivoted about a pivot axis located in front of the ski boot, the front jaw of conventional safety ski bindings allows the ski boot to move forwards in the longitudinal direction of the ski during the release rotation of the sole holder of the front jaw, so that the ski boot moves forward Compression spring of the heel shoe is pushed forward during the release movement of the front shoe. This also moves the swivel axis forward, which affects the uniformity of the release movement.
  • the radius of the enveloping circle of the spring elements is greater than the distance between the pivot axis of the fork jaw and the end faces of the centering or spring elements facing the heel jaw.
  • a distance from the points of contact between the spring elements and the sole of the ski shoe that runs transversely to the central longitudinal axis is less than half the width of the fork jaw, since the distance between the support points additionally roughly predefines the area in which the deflection movement is damped or triggered can.
  • the spring forces of the two spring elements are expediently of the same order of magnitude, although differences in the spring forces can occur due to different frictional resistances. For this reason, the spring force of the front spring element is expediently somewhat less than the spring force of the spring element of the heel shoe.
  • the spring forces of the spring elements of the toe piece and the heel piece are of the same order of magnitude, in particular are approximately the same, as a result of which undesired false triggers can be changed more easily in the case of one-sided deflection movements of the ski boot.
  • the spring force of the spring element of the toe piece is less than the spring force of the spring element of the heel piece, since the higher frictional forces between the toe pieces and the ski boot or the larger sole contact area can be compensated for in relation to the distance between the pivot axis and still there are approximately the same prestressing forces in the area of the toe and heel.
  • the spring elements are supported by further spring elements, in particular interchangeable rubber and / or plastic inserts in the front or heel cheeks, as a result of which the spring forces and thus the damping behavior can be easily adapted to different purposes.
  • the distance from points of contact of the spring elements with the ski boot sole, which runs parallel to the mounting surface of the front and / or heel cheeks, is approximately between 5 mm and 20 mm, preferably 10 mm, thereby triggering the ski binding upon a deflection between 5 ° and 10 ° is achieved regardless of the set spring forces by releasing or eliminating the lateral guidance of the ski boot in the area of the toe.
  • a spring force of the further spring elements assigned to one of the two spring elements is less than a spring force of the spring element in the heel shoe, since the spring force with which the individual spring elements are acted upon can be different and, for example, that of the inner edge of the ski closer spring elements can be biased with a higher spring force than those closer to the outside of the ski, so that higher stresses arising when the skis are edged are dampened more than, for example, movements of the ski such as occur when threading into a slalom pole or the like in the opposite direction. In any case, however, this ensures that the spring force resulting from the friction losses and the spring force in the region of the toe piece is not greater than the spring force of the spring elements in the heel piece.
  • the toe piece 3 is mounted or locked in a ski-like manner and has a sole holder designed as a fork piece 7, which extends around a perpendicular to the plane of the ski 1 Pivot axis 9 is pivotable.
  • the fork jaw 7 holds the front end of the sole of a ski boot 11 on opposite sides of the longitudinal center of the ski between its fork legs 13 at essentially point-shaped or linear support points 15.
  • the fork jaw is locked in the normal position and is locked by the ski boot 11 when a predetermined value is exceeded Exerted torque is pivoted out of the normal position, whereby the ski boot 11 is released.
  • the heel jaw 5 holds the ski boot 11 in the heel area with a fork jaw 17, preferably also at two point or line-shaped support points 19 on either side of the longitudinal center of the ski.
  • the fork jaw 17 can be pivoted in a manner not shown, about a transverse axis running parallel to the ski plane, and is also locked in the normal position. It is triggered in frontal supports in a known manner and releases the heel of the ski boot 11.
  • the ski boot 11 is held in the correct binding setting with a predetermined spring force between the fork jaws 7 and 17.
  • the heel shoe 5 is guided in a rail 21 in the longitudinal direction of the ski.
  • the heel shoe 5 is supported by a spring element 22 on a worm 25 which, in turn, engages in a linear toothing of a ski-fixed part, not shown, with the axis running in the longitudinal direction of the ski.
  • the worm 25 is connected to an adjusting screw 27, by means of which it is rotated and displaceable along the linear toothing of the ski-fixed part.
  • the position that is, the distance of the fork jaw 17 relative to the front jaw 3, and moreover that when the ski boot is clamped, can be adjusted 11 resultant bias of the helical compression spring 22, which forms a spring element 23, change.
  • a stop 29 limits the feed path of the heel cheek 5 when the ski boot 11 is missing. The stop 29 held on the heel cheek 5 strikes an end face 31 of the worm 25.
  • the ski boot 11 pivots about an indicated pivot axis 33 coinciding with the shin axis.
  • the heel region of the ski boot 11 has the shape of a circular arc around the pivot axis 33, so that the fork jaws 17 can guide the ski boot 11 with the pivot axis 33 remaining in place.
  • the front end of the ski boot sole runs approximately in a circle around the pivot axis 33. This leads to the situation shown in FIG. 2 when the toe piece 3 is released.
  • a spring element 37 which is formed by two spring tabs 36 and acts directly on the front sole region of the ski shoe 11, is provided on the fork jaw 7.
  • the spring tabs 36 protrude from each other from the fork legs 13 and rest with their free ends on the front end of the sole of the ski boot 11. They are curved in a circular arc around the pivot axis 9 and are biased by the ski boot 11 held in the ski binding.
  • the spring force of the spring tabs 36 is dimensioned essentially equal to the biasing force of the helical compression spring 22, but can be smaller than the compressive force 24 of the helical compression spring 22 by the frictional force counteracting the pressure force of the helical compression spring 22 caused by the shoe and the like.
  • FIGS. 1 and 2 show with a dashed line the deflection of the spring tabs 36 in the normal position of the binding.
  • the spring tab 36 are sprung and the sprung position is indicated by dashed lines.
  • the comparison of FIGS. 1 and 2 shows that the spring tabs 36 and one fork leg 13 lying in the direction of movement keep the ski boot 11 in balance during the pivoting movement against the action of the helical compression spring 22, so that the position of the pivot axis 33 relative to the ski 1 does not change.
  • the spring tabs 36 are an integral part of the fork jaw 7, which is expediently designed as a molded plastic part.
  • the front jaw 3 and the heel jaw 5 can be attached separately to the ski; but they can also be coupled to one another via a flexible connecting rail, similar to the ski binding of utility model 82 23 875, and can be adjusted as a unit along the ski.
  • the fork jaw 17 of the heel jaw 5 can be provided instead of the helical compression spring 22 with integral spring tabs, similar to the fork jaw 7, and likewise the front jaw 3 can be displaceably guided in a ski-fixed guide and by a compression spring as a whole towards the ski boot be biased.
  • FIG. 3 and 4 show the front jaw 3 of the safety ski binding 2 with the spring elements 37 which in the present case are formed by spring tabs or spring arms or brackets.
  • the spring elements 37 which in the present case are formed by spring tabs or spring arms or brackets.
  • a further spring element 40 or 41 can be assigned to each spring element 37 on the side facing away from a front end face 38 of the sole 39.
  • the pretension that can be exerted with the spring elements 37 in the direction of the heel shoe 5 can be changed as desired.
  • the spring element 41 with a harder spring characteristic, ie a higher spring force or a higher deformation resistance equip.
  • a radius 45, in which the spring elements 37 are arranged in the untensioned state is greater than a distance 46 between the front side 38 of the spring elements 37 facing the sole 39 in the relaxed state and a center point of the pivot axis 9 of the toe piece 3.
  • the spring elements 37 carry forward over their entire length from the front jaw 3. If it is desired to achieve a higher prestressing effect of the spring elements 37, the freely projecting length of the spring elements 37 can advantageously be shortened accordingly.
  • the spring elements 40 and 41 can also exert the same spring characteristic and thus the same damping force with the same spring travel.
  • a distance 49 between two contact points 50 between the end face 38 of the sole 39 and the spring elements 37 is increased to a distance 51. Due to the relatively soft suspension characteristics of the spring elements 37 in relation to a release spring 52 with which that release force and that release path is determined, in which the front jaw 3 can snap away laterally and thus the ski boot 42 can slide out of the ski binding.
  • the spring elements 37 react immediately and try to build up a counterforce in the return direction, and center the ski boot 42 between the fork legs 13. If the pressure force exerted by the shoe on one of the fork legs 13 is higher and cannot be absorbed by the different deformation of the spring elements 37, the fork jaw 7 is deflected further in a direction of the double arrow 53, as a result of which the opposite rotational movement, as already shown in FIG .2 shown, the ski boot 42 is only supported on the fork leg 13 leading in the direction of movement and on the spring element 37 which is further away from it.
  • the positions of the fork jaw 7 of the front jaw 3 are just before the triggering of the release mechanism and the ski shoe 42 falling out of the safety with a slight deflection from a desired or rest position and with a considerable deflection of the fork jaw 7 - Ski binding 2 shown.
  • the spring 39 of the ski boot 42 is pressed by the spring element 23 in the heel 5 against the spring elements 55, 56, which are located between the fork legs 57, 58.
  • the ski boot 42 When the ski boot 42 is slightly deflected from the rest position 54, the ski boot rotates around the fictitious one Swivel axis, which is located in the area of the shin of the lower leg.
  • a radius of a rolling circle 59 along which the end face 38 of the ski boot 42 moves depends on the size of the boot.
  • the sides facing the end face 38 of the ski shoe 42 are located within an enveloping circle 60 with a radius 47. If the fork jaw 7 is laterally deflected, the contact point 50 of the spring element is displaced 55 in the direction of the rest position 54, while the contact point 50 assigned to the spring element 56 moves away from the latter.
  • This has the effect that the spring element 55 is deformed more in the direction of the pivot axis 9, in practice, even by the slightest amount, while the spring element 56 can relax by a slight amount. This results in a differential force in the two contact points 50, which attempt to restore the equilibrium state between the pressure forces acting in the two contact points 50, which are built up by the spring element 23.
  • the sole 39 of the ski boot 42 pivots further about the pivot axis 33 in the direction of the arrow symbolizing the triggering force 61, so that the ski boot 42 now pivots at a point of contact 62 is supported directly on the fork leg 58, which counteracts the rebound movement in the sense of the triggering force 61 with a counterforce 63 which is built up by the trigger spring 52.
  • the ski boot 42 is mainly supported via the release spring of the fork jaw 7 and the fork leg 58 and in the region of the heel jaw 5.
  • the shoe axis 64 of the ski boot 42 now has the tendency to move in the direction of the rest position 54, since due to the relative movements due to the rolling of the rolling circle 59 on the enveloping circle 60 between the end face 38 around the fork leg 57 there is a gap 35.
  • the spring force 65 which is applied with the spring element 55, a holding force 66, as indicated schematically by an arrow, is built up, a lateral deviation of the ski boot 42 against this holding force 66 and thus at the same time also a dodging prevented in the direction of the pivot axis 9.
  • the advantage of this design or arrangement is that if the release force 61 is not sufficient to release or open the release mechanism, the ski boot 42 can pivot back exactly into its original rest position 54, since only the deformation force of the spring elements 55, 56 is to be overcome, so that they again assume, for example, the position shown in full lines in FIG. Due to the support via the contact point 62 on the fork leg 58 and only after corresponding deformation and build-up of a counterforce of the spring elements 55, 56, the pressing force that is then predominantly applied only by the spring element 23 again divides onto the two spring elements 55 and 56, as already described above, have the tendency to align and center the ski boot 42 and the fork 9.
  • FIGS. 3 to 6 have been substantially simplified and shown partially schematically and partially to scale in order to better illustrate the function of the spring elements according to the invention.
  • the view from below was predominantly chosen so that those parts of the fork jaw 7 which overlap the end face 38 of the ski boot 42 do not cover the important areas for the interaction of the spring elements and the end face 38.
  • front jaw 3 is in no way linked to the exemplary embodiments shown in the drawings, but rather front jaws can also be used which, in addition to being triggered about a vertical pivot axis 9, also about a perpendicular thereto and parallel to a mounting surface 75 - FIG .4 - trending Swivel axis can be triggered.
  • the spring elements 37 described in FIGS. 1 to 4 designed as spring tabs, also act as centering elements, the function of the centering and spring elements being combined when the spring action is due to the material properties or the design of the centering elements, as in the case of the illustration of FIG Fig.1 to 4 is achieved.
  • a distance 49 between two contact points 50 that runs parallel to the mounting surface 75 is less than one half of a width 76.
  • this distance is approximately between 5 mm and 25 mm, preferably 10 mm.
  • the spring elements 37 or the spring tabs 36 with friction-reducing coverings are arranged at least in those areas where the ski boot comes into contact. This applies above all to the points of contact 50 and 62. It is also possible, therefore, to slide sliding sleeves onto the freely projecting ends of the spring tabs.

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Abstract

The invention describes a safety ski binding with a front clamp (3), a forked clamp (7) guiding the ski boot (11) at the front of the sole and a heel clamp (5). The heel clamp (5) has a forked clamp (17) which guides the ski boot (11) in the region of the arch when the forked clamp (7) of the front clamp (3) is angled. The front (3) and/or the heel clamp (5) are fitted with two centring devices (67, 68, 71), especially of the spring-loaded type (37). These are essentially adjustable parallel to a central longitudinal axis (48) interconnecting the front and heel clamps (3, 5) and arranged on either side of the central longitudinal axis (48).

Description

Die Erfindung betrifft eine Sicherheits-Skibindung mit den im Oberbegriff des Anspruches 1 angegebenen Merkmalen.The invention relates to a safety ski binding with the features specified in the preamble of claim 1.

Ein Vorläufer einer Sicherheits-Skibindung dieser Art ist aus dem deutschen Gebrauchsmuster DE-U-82 23 875 bekannt. Bei dieser Skbindung sind sowohl der Vorderbacken als auch der Fersenbacken in skifesten Führungen längs des Skis verschiebbar geführt und durch eine flexible Verbindungsschiene miteinander gekoppelt, so daß sie als Einheit längs des Skis für die Optimierung der Fahreigenschaften des Skis verschoben werden können. Der Vorderbacken ist in der gewünschten Bindungsposition verrastbar, während der Fersenbacken frei beweglich bleibt, um unerwünschte Aussteifungen des Skis im Bindungsbereich zu verhindern. Der am Absatz des Skischuhs angreifende Sohlenhalter des Fersenbackens ist seinerseits beweglich relativ zu der über den Vorderbacken skifest verrasteten Verbindungsschiene geführt und wird von einer Druckfeder auf den Vorderbacken zu vorgespannt. Die Druckfeder sorgt für einen gleichbleibenden Anpreßdruck, mit dem der Skischuh am Sohlenhalter des Vorderbackens anliegt und damit für gleichbleibende Auslösebedingungen eines vorgegebenen Auslösedrehmoments des ausschwenkenden und den Skischuh freigebenden Sohlenhalters des Vorderbackens.A forerunner of a safety ski binding of this type is known from the German utility model DE-U-82 23 875. In this ski binding, both the front jaw and the heel jaws are guided in ski-fixed guides along the ski and are coupled to one another by a flexible connecting rail, so that they can be moved as a unit along the ski to optimize the skiing characteristics of the ski. The toe piece can be locked in the desired binding position, while the heel piece remains freely movable to prevent unwanted stiffening of the ski in the binding area. The sole holder of the heel shoe, which engages the heel of the ski boot, is in turn movable relative to the connecting rail, which is firmly locked over the front shoe, and is pre-tensioned by a compression spring on the front shoe. The compression spring ensures a constant contact pressure with which the ski shoe rests against the sole holder of the toe piece and thus for constant triggering conditions of a predetermined release torque of the swinging out and release of the ski shoe sole holder of the toe piece.

Bei der Drehauslösung der Sicherheits-Skibindung, bei welcher der Vorderbacken den Skischuh freigibt, wird angestrebt, daß die Schwenkachse des Skischuhs im wesentlichen mit der Schienbeinachse zusammenfällt, um vorherbestimmbare Schwenkradien des vorderen Sohlenbereichs als auch des hinteren Absatzbereichs zu erhalten. Insbesondere soll bei der Schwenkbewegung des Skischuhs der Sohlen- bzw. Absatzhalter des Fersenbackens den Skischuh so führen, daß dieser die Schwenkbewegung um die Schienbeinachse herum ausführt.When the safety ski binding is released in rotation, in which the front jaw releases the ski boot, the aim is that the pivot axis of the ski boot essentially coincides with the shin axis in order to obtain predeterminable pivot radii of the front sole area and of the rear heel area. In particular, during the pivoting movement of the ski boot, the sole or heel holder of the heel shoe should guide the ski boot in such a way that it executes the pivoting movement around the shin axis.

Der Sohlenhalter des Vorderbackens ist üblicherweise als Gabelbacken ausgebildet und führt den Skischuh in seiner Normallage auf gegenüberliegenden Seiten angenähert punktförmig. Aufgrund der Kinematik der Schwenkbewegung des Skischuhs und des um eine vor dem Skischuh gelegene Schwenkachse schwenkbaren Sohlenhalters, erlaubt der Vorderbacken herkömmlicher Sicherheits-Skibindungen, während der Auslösedrehung des Sohlenhalters des Vorderbackens, eine Bewegung des Skischuhs in Skilängsrichtung nach vorn, so daß der Skischuh von der Druckfeder des Fersenbackens während der Auslösebewegung des Vorderbackens nach vorn geschoben wird. Damit wandert auch die Schwenkachse nach vorn, was die Gleichförmigkeit der Auslösebewegung beeinträchtigt.The sole holder of the front jaw is usually designed as a fork jaw and guides the ski boot in its normal position on opposite sides in an approximately punctiform manner. Due to the kinematics of the pivoting movement of the ski boot and the sole holder which can be pivoted about a pivot axis located in front of the ski boot, the front jaw of conventional safety ski bindings allows the ski boot to move forwards in the longitudinal direction of the ski during the release rotation of the sole holder of the front jaw, so that the ski boot moves forward Compression spring of the heel shoe is pushed forward during the release movement of the front shoe. This also moves the swivel axis forward, which affects the uniformity of the release movement.

Zur Lösung des vorstehend erörterten Problems wurde gemäß DE-U-88 04 613 vorgeschlagen, an den Gabelbacken des Vorder- und/oder Fersenbackens kreisbogenförmig gekrümmte Federelemente vorzusehen, die im wesentlichen parallel zu einer den Vorder- und Fersenbacken verbindenden Mittellängsachse federnd verstellbar und beidseits der Mittellängsachse angeordnet sind. Die Federelemente bestehen aus steifelastischem Material und bilden eine integrale Einheit mit dem Vorder- und/oder Fersenbacken. Der Mittelpunkt des Hüllkreises der kreisbogenförmig gekrümmten Federelemente ist dabei auf der Mittellängsachse angeordnet und liegt in der Schwenkachse des Vorderbackens.To solve the problem discussed above, it was proposed according to DE-U-88 04 613 to provide arcuate spring elements on the fork jaws of the front and / or heel jaws, which are resiliently adjustable essentially on both sides of the central longitudinal axis connecting the front and heel jaws Central longitudinal axis are arranged. The spring elements are made of stiff elastic material and form an integral unit with the front and / or heel cheeks. The center point of the enveloping circle of the curved spring elements is arranged on the central longitudinal axis and lies in the pivot axis of the front jaw.

Das Auslöseverhalten dieser weiterentwickelten Sicherheits-Skibindung ist zwar gegenüber der Bindung gemäß DE-U-82 23 875 erheblich verbessert, jedoch ist das Ansprechverhalten einer solchen Sicherheitsbindung - also im wesentlichen das Dämpfungsverhalten bei seitlichen Schlägen und das Auslöseverhalten bei grenzwertüberschreitenden Kräften zwischen Bindung und Schuh - weiter optimierbar.The triggering behavior of this further developed safety ski binding is considerably improved compared to the binding according to DE-U-82 23 875, but the response behavior of such a safety binding - essentially the damping behavior in the event of side impacts and the triggering behavior in the case of cross-limit forces between binding and boot - further optimizable.

Es ist daher Aufgabe der Erfindung eine Sicherheits-Skibindung der gattungsgemäßen Art so zu verbessern, daß das Ansprechverhalten der Bindung optimiert wird.It is therefore an object of the invention to improve a safety ski binding of the generic type in such a way that the responsiveness of the binding is optimized.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichnungsteil des Anspruches 1 angegebenen Merkmale gelöst. Demnach ist der Radius des Hüllkreises der Federelemente größer als die Distanz zwischen der Schwenkachse des Gabelbackens und der dem Fersenbacken zugewandten Stirnseiten der Zentrier- bzw. Federelemente. Durch eine entsprechende Wahl eines Radius der größer ist, als die Distanz zwischen den Federlappen und der Schwenkachse in Richtung einer Mittellängsachse der Sicherheits-Skibindung wird über einen größeren Schwenkbereich eine Abwälzung der beiden Radien, nämlich einer vorderen Stirnseite der Sohle des Skischuhs und der Federlappen erreicht, wodurch unerwünschte Längsverstellungen des Skischuhs relativ zum Ski in einfacher Weise ausgeschalten werden. Darüber hinaus ist ein quer zu Mittellängsachse verlaufender Abstand von Berührungspunkten der Federelemente mit der Skischuhsohle geringer als eine Hälfte der Breite des gabelbackens, da durch die Distanz zwischen den Abstützpunkten zusätzlich der Bereich, in welchen eine Dämpfung der Auslenkbewegung bzw. eine Auslösung erfolgt grob vordefiniert werden kann. Die Federkräfte der beiden Federelemente liegen zweckmäßigerweise in der gleichen Größenordnung, wobei jedoch aufgrund unterschiedlicher Reibungswiderstände Unterschiede in den Federkräften auftreten können. Die Federkraft des vorderen Federelements ist aus diesem Grund zweckmäßigerweise etwas kleiner als die Federkraft des Federelements des Fersenbackens.This object is achieved by the features specified in the characterizing part of claim 1. Accordingly, the radius of the enveloping circle of the spring elements is greater than the distance between the pivot axis of the fork jaw and the end faces of the centering or spring elements facing the heel jaw. By appropriately selecting a radius that is greater than the distance between the spring tabs and the pivot axis in the direction of a central longitudinal axis of the safety ski binding, a roll-over of the two radii, namely a front end face of the sole of the ski boot and the spring tab, is achieved , whereby unwanted longitudinal adjustments of the ski boot relative to the ski can be switched off in a simple manner. In addition, a distance from the points of contact between the spring elements and the sole of the ski shoe that runs transversely to the central longitudinal axis is less than half the width of the fork jaw, since the distance between the support points additionally roughly predefines the area in which the deflection movement is damped or triggered can. The spring forces of the two spring elements are expediently of the same order of magnitude, although differences in the spring forces can occur due to different frictional resistances. For this reason, the spring force of the front spring element is expediently somewhat less than the spring force of the spring element of the heel shoe.

Nach einer Ausführungsvariante ist vorgesehen, daß die Federkräfte der Federelemente des Vorderbackens und des Fersenbackens in einer gleichen Größenordnung liegen, insbesondere angenähert gleich sind, wodurch unerwünschte Fehlauslösungen bei einseitigen Auslenkbewegungen des Skischuhs einfacher verändert werden können.According to one embodiment variant, it is provided that the spring forces of the spring elements of the toe piece and the heel piece are of the same order of magnitude, in particular are approximately the same, as a result of which undesired false triggers can be changed more easily in the case of one-sided deflection movements of the ski boot.

Vorteilhaft ist es aber auch, wenn die Federkraft des Federelements des Vorderbackens kleiner ist als die Federkraft des Federelements des Fersenbackens, da damit die höheren Reibungskräfte zwischen den Vorderbacken und dem Skischuh bzw. der größeren Sohlenaufstandsfläche im Verhältnis zum Abstand der Schwenkachse ausgeglichen werden können und trotzdem im Bereich des Vorderbackens und Fersenbackens etwa gleiche Vorspannkräfte vorliegen.However, it is also advantageous if the spring force of the spring element of the toe piece is less than the spring force of the spring element of the heel piece, since the higher frictional forces between the toe pieces and the ski boot or the larger sole contact area can be compensated for in relation to the distance between the pivot axis and still there are approximately the same prestressing forces in the area of the toe and heel.

Weiters ist es auch möglich, daß die Federelemente über weitere Federelemente, insbesondere auswechselbare Gummi- und/oder Kunststoffeinlagen im Vorder- bzw. Fersenbacken, abgestützt sind, wodurch die Federkräfte und damit das Dämpfungsverhalten an unterschiedliche Einsatzzwecke einfach angepaßt werden kann.Furthermore, it is also possible for the spring elements are supported by further spring elements, in particular interchangeable rubber and / or plastic inserts in the front or heel cheeks, as a result of which the spring forces and thus the damping behavior can be easily adapted to different purposes.

Nach einer Ausführungsform ist vorgesehen, daß der parallel zur Montagefläche der Vorder- und/oder Fersenbacken verlaufende Abstand von Berührungspunkten der Federelemente mit der Skischuhsohle in etwa zwischen 5 mm und 20 mm, vorzugsweise 10 mm beträgt, wodurch eine Auslösung der Skibindung bei einer Auslenkung zwischen 5° und 10° in jedem Fall unabhängig von den eingestellten Federkräften durch Freigabe bzw. Wegfall der seitlichen Führung des Skischuhs im Bereich des Vorderbackens erzielt wird.According to one embodiment, it is provided that the distance from points of contact of the spring elements with the ski boot sole, which runs parallel to the mounting surface of the front and / or heel cheeks, is approximately between 5 mm and 20 mm, preferably 10 mm, thereby triggering the ski binding upon a deflection between 5 ° and 10 ° is achieved regardless of the set spring forces by releasing or eliminating the lateral guidance of the ski boot in the area of the toe.

Vorteilhaft ist es aber auch, wenn eine Federkraft der einen der beiden Federelemente zugeordneten weiteren Federelemente geringer ist als eine Federkraft des Federelementes im Fersenbacken, da dadurch die Federkraft, mit welchen die einzelnen Federelemente beaufschlagt sind, unterschiedlich sein können und beispielsweise die der Innenkante des Skis näher liegenden Federelemente mit einer höheren Federkraft vorgespannt sein können, als die der Skiaußenseite näher liegenden, sodaß beim Aufkanten der Ski entstehende höhere Beanspruchungen stärker gedämpft werden als beispielsweise Bewegungen des Skis wie sie bei einem Einfädeln in eine Slalomstange oder dgl. in entgegengesetzter Richtung auftreten. In jedem Fall wird aber dadurch sichergestellt, daß die sich aus den Reibungsverlusten und der Federkraft im Bereich des Vorderbackens ergebende Federkraft nicht größer ist als die Federkraft der Federelemente im Fersenbacken.However, it is also advantageous if a spring force of the further spring elements assigned to one of the two spring elements is less than a spring force of the spring element in the heel shoe, since the spring force with which the individual spring elements are acted upon can be different and, for example, that of the inner edge of the ski closer spring elements can be biased with a higher spring force than those closer to the outside of the ski, so that higher stresses arising when the skis are edged are dampened more than, for example, movements of the ski such as occur when threading into a slalom pole or the like in the opposite direction. In any case, however, this ensures that the spring force resulting from the friction losses and the spring force in the region of the toe piece is not greater than the spring force of the spring elements in the heel piece.

Im folgenden werden die Ausführungsbeispiele der Erfindung anhand Zeichnungen näher erläutert. Hierbei zeigen:

Fig. 1
eine teilweise aufgebrochene Draufsicht auf eine Sicherheits-Skibindung in Normallage;
Fig. 2
die Skibindung bei ausgelöstem Vorderbacken;
Fig. 3
einen Vorderbacken in Draufsicht;
Fig. 4
den Vorderbacken in Stirnansicht, geschnitten, gemäß den Linien IV-IV in Fig.3;
Fig. 5
eine Darstellung einer erfindungsgemäßen Sicherheits-Skibindung in stark vereinfachter schematischer Darstellung, bei geringfüging seitlich ausgelenktem Vorderbacken; und
Fig. 6
eine Darstellung einer erfindungsgemäßen Sicherheits-Skibindung in stark vereinfachter schematischer Darstellung, bei stark seitlich ausgelenktem Vorderbacken.
The exemplary embodiments of the invention are explained in more detail below with reference to drawings. Here show:
Fig. 1
a partially broken plan view of a safety ski binding in normal position;
Fig. 2
the ski binding when the toe is released;
Fig. 3
a front jaw in plan view;
Fig. 4
the front jaws in front view, cut, according to lines IV-IV in Figure 3;
Fig. 5
a representation of a safety ski binding according to the invention in a highly simplified schematic representation, with the toe piece slightly deflected laterally; and
Fig. 6
a representation of a safety ski binding according to the invention in a highly simplified schematic representation, with the toe piece strongly deflected laterally.

Fig.1 zeigt eine auf einem Ski 1 montierte Sicherheits-Skibindung 2 mit einem Vorderbacken 3 und einem Fersenbacken 5. Der Vorderbacken 3 ist skifest montiert oder verrastet und hat einen als Gabelbacken 7 ausgebildeten Sohlenhalter, der um eine senkrecht zur Ebene des Skis 1 verlaufende Schwenkachse 9 schwenkbar ist. In Normallage hält der Gabelbacken 7 das Vorderende der Sohle eines Skischuhs 11 auf gegenüberliegenden Seiten der Skilängsmitte zwischen seinen Gabelschenkeln 13 an im wesentlichen punkt- bzw. linienförmigen Auflagestellen 15. Der Gabelbacken ist in der Normallage verrastet und wird bei Überschreiten eines vorgegebenen, vom Skischuh 11 ausgeübten Drehmoments aus der Normallage herausgeschwenkt, womit der Skischuh 11 freigegeben wird.1 shows a safety ski binding 2 mounted on a ski 1 with a toe piece 3 and a heel piece 5. The toe piece 3 is mounted or locked in a ski-like manner and has a sole holder designed as a fork piece 7, which extends around a perpendicular to the plane of the ski 1 Pivot axis 9 is pivotable. In the normal position, the fork jaw 7 holds the front end of the sole of a ski boot 11 on opposite sides of the longitudinal center of the ski between its fork legs 13 at essentially point-shaped or linear support points 15. The fork jaw is locked in the normal position and is locked by the ski boot 11 when a predetermined value is exceeded Exerted torque is pivoted out of the normal position, whereby the ski boot 11 is released.

Der Fersenbacken 5 hält den Skischuh 11 im Absatzbereich mit einem Gabelbacken 17 bevorzugt ebenfalls an zwei punkt- oder linienförmigen Auflagestellen 19 beiderseits der Skilängsmitte. Der Gabelbacken 17 ist in nicht näher dargestellter Weise um eine parallel zur Skiebene verlaufende Querachse schwenkbar und ist in der Normallage ebenfalls verrastet. Er wird bei Frontalstützen in bekannter Weise ausgelöst und gibt hierbei den Absatz des Skischuhs 11 frei.The heel jaw 5 holds the ski boot 11 in the heel area with a fork jaw 17, preferably also at two point or line-shaped support points 19 on either side of the longitudinal center of the ski. The fork jaw 17 can be pivoted in a manner not shown, about a transverse axis running parallel to the ski plane, and is also locked in the normal position. It is triggered in frontal supports in a known manner and releases the heel of the ski boot 11.

Der Skischuh 11 wird bei korrekter Bindungseinstellung mit einer vorbestimmten Federkraft zwischen den Gabelbacken 7 und 17 gehalten. Für die Justierung der Vorspannkraft ist der Fersenbacken 5 in einer Schiene 21 in Skilängsrichtung verschiebbar geführt. Der Fersenbacken 5 stützt sich über ein Federelement 22 an einer Schnecke 25, die ihrerseits mit in Skilängsrichtung verlaufender Achse in eine Linearverzahnung eines nicht näher dargestellter skifesten Teils eingreift. Die Schnecke 25 ist mit einer Einstellschraube 27 verbunden, über die sie gedreht und längs der Linearverzahnung des skifesten Teils verschiebbar ist. Durch die Positionsverschiebung der Schnecke 25 läßt sich die Position also die Distanz des Gabelbackens 17 relativ zum Vorderbacken 3 justieren und darüberhinaus die bei eingespanntem Skischuh 11 sich ergebende Vorspannung der Schraubendruckfeder 22, die ein Federelement 23 bildet, ändern. Ein Anschlag 29 begrenzt den Vorschubweg des Fersenbackens 5 bei fehlendem Skischuh 11. Der an dem Fersenbacken 5 gehaltene Anschlag 29 schlägt hierbei an einer Stirnfläche 31 der Schnecke 25 an.The ski boot 11 is held in the correct binding setting with a predetermined spring force between the fork jaws 7 and 17. For the adjustment of the prestressing force, the heel shoe 5 is guided in a rail 21 in the longitudinal direction of the ski. The heel shoe 5 is supported by a spring element 22 on a worm 25 which, in turn, engages in a linear toothing of a ski-fixed part, not shown, with the axis running in the longitudinal direction of the ski. The worm 25 is connected to an adjusting screw 27, by means of which it is rotated and displaceable along the linear toothing of the ski-fixed part. By shifting the position of the screw 25, the position, that is, the distance of the fork jaw 17 relative to the front jaw 3, and moreover that when the ski boot is clamped, can be adjusted 11 resultant bias of the helical compression spring 22, which forms a spring element 23, change. A stop 29 limits the feed path of the heel cheek 5 when the ski boot 11 is missing. The stop 29 held on the heel cheek 5 strikes an end face 31 of the worm 25.

Bei der Drehauslösung des Vorderbackens 3 schwenkt der Skischuh 11 um eine angedeutete mit der Schienbeinachse zusammenfallende Schwenkachse 33. Der Absatzbereich des Skischuhs 11 hat die Form eines Kreisbogens um die Schwenkachse 33, sodaß der Gabelbacken 17 den Skischuh 11 mit skifestbleibender Schwenkachse 33 zu führen vermag. Das Vorderende der Skischuhsohle verläuft angenähert auf einem Kreis um die Schwenkachse 33. Dies führt bei der Auslösebewegung des Vorderbackens 3 zu der in Fig.2 dargestellten Situation. Aufgrund der Kinematik der gegengleichen Schwenkbewegung des Vorderendes der Skischuhsohle und des im wesentlichen V-förmigen Gabelbackens 7, um von der Berührungsstelle in entgegengesetzten Richtungen distanziert angeordnete Schwenkachse 9 bzw. 33 bildet sich zwischen dem Vorderende der Skischuhsohle und dem in Drehrichtung hinten liegenden Gabelschenkel 13 ein Spalt 35. Die Schraubendruckfeder 22 versucht daher den Skischuh 11 soweit nach vorne einzuschieben, daß er sich wieder auf beiden Gabelschenkeln 13 abstützt. Um diese Vorwärtsbewegung des Skischuhs 11 in Richtung der Schwenkachse 9 entgegenwirkend ist an dem Gabelbacken 7 ein unmittelbar am vorderen Sohlenbereich des Skischuhs 11 angreifendes, durch zwei Federlappen 36 gebildetes Federelement 37 vorgesehen. Die Federlappen 36 stehen von den Gabelschenkeln 13 aufeinander zu ab und liegen mit ihren freien Enden am Vorderende der Sohle des Skischuhs 11 an. Sie sind kreisbogenförmig um die Schwenkachse 9 herum gekrümmt und werden von dem in der Skibindung gehaltenen Skischuh 11 vorgespannt. Die Federkraft der Federlappen 36 ist im wesentlichen gleich der Vorspannkraft der Schraubendruckfeder 22 bemessen, kann aber, um die vom Schuh und dergleichen hervorgerufenen, der Druckkraft der Schraubendruckfeder 22 entgegenwirkenden Reibungskraft kleiner sein als die Druckkraft 24 der Schraubendruckfeder 22.When the toe piece 3 is released from rotation, the ski boot 11 pivots about an indicated pivot axis 33 coinciding with the shin axis. The heel region of the ski boot 11 has the shape of a circular arc around the pivot axis 33, so that the fork jaws 17 can guide the ski boot 11 with the pivot axis 33 remaining in place. The front end of the ski boot sole runs approximately in a circle around the pivot axis 33. This leads to the situation shown in FIG. 2 when the toe piece 3 is released. Due to the kinematics of the opposite swiveling movement of the front end of the ski shoe sole and the substantially V-shaped fork jaw 7, about the pivot axis 9 or 33, which is spaced apart from the contact point in opposite directions, forms between the front end of the ski shoe sole and the fork leg 13 located in the direction of rotation at the rear Gap 35. The helical compression spring 22 therefore tries to push the ski boot 11 so far forward that it is supported on both fork legs 13 again. To counteract this forward movement of the ski boot 11 in the direction of the pivot axis 9, a spring element 37, which is formed by two spring tabs 36 and acts directly on the front sole region of the ski shoe 11, is provided on the fork jaw 7. The spring tabs 36 protrude from each other from the fork legs 13 and rest with their free ends on the front end of the sole of the ski boot 11. They are curved in a circular arc around the pivot axis 9 and are biased by the ski boot 11 held in the ski binding. The spring force of the spring tabs 36 is dimensioned essentially equal to the biasing force of the helical compression spring 22, but can be smaller than the compressive force 24 of the helical compression spring 22 by the frictional force counteracting the pressure force of the helical compression spring 22 caused by the shoe and the like.

Fig.1 zeigt mit einer gestrichelten Linie die Einfederung der Federlappen 36 in der Normallage der Bindung. In Fig.2 sind die Federlappen 36 ausgefedert und die eingefederte Stellung ist gestrichelt angedeutet. Der Vergleich der Fig.1 und 2 zeigt, daß die Federlappen 36 und der eine in Bewegungsrichtung vorne liegende Gabelschenkel 13 gegen die Wirkung der Schraubendruckfeder 22 den Skischuh 11 bei der Schwenkbewegung im Gleichgewicht halten, so daß sich die Lage der Schwenkachse 33 relativ zum Ski 1 nicht ändert.1 shows with a dashed line the deflection of the spring tabs 36 in the normal position of the binding. In Figure 2, the spring tab 36 are sprung and the sprung position is indicated by dashed lines. The comparison of FIGS. 1 and 2 shows that the spring tabs 36 and one fork leg 13 lying in the direction of movement keep the ski boot 11 in balance during the pivoting movement against the action of the helical compression spring 22, so that the position of the pivot axis 33 relative to the ski 1 does not change.

Die Federlappen 36 sind integraler Bestandteil des Gabelbackens 7, der zweckmäßigerweise als Kunststoff-Formteil ausgebildet ist.The spring tabs 36 are an integral part of the fork jaw 7, which is expediently designed as a molded plastic part.

Der Vorderbacken 3 und der Fersenbacken 5 können gesondert an dem Ski befestigt sein; sie können aber auch ähnlich der Skibindung des Gebrauchsmusters 82 23 875 über eine flexible Verbindungsschiene miteinander gekuppelt und als Einheit längs des Skis verstellbar sein.The front jaw 3 and the heel jaw 5 can be attached separately to the ski; but they can also be coupled to one another via a flexible connecting rail, similar to the ski binding of utility model 82 23 875, and can be adjusted as a unit along the ski.

Es versteht sich, daß auch der Gabelbacken 17 des Fersenbackens 5 an Stelle der Schraubendruckfeder 22 mit integralen Federlappen, ähnlich dem Gabelbacken 7 versehen sein kann, und ebenso kann der Vorderbacken 3 in einer skifesten Führung verschiebbar geführt und von einer Druckfeder insgesamt auf den Skischuh zu vorgespannt sein.It goes without saying that the fork jaw 17 of the heel jaw 5 can be provided instead of the helical compression spring 22 with integral spring tabs, similar to the fork jaw 7, and likewise the front jaw 3 can be displaceably guided in a ski-fixed guide and by a compression spring as a whole towards the ski boot be biased.

In den Fig.3 und 4 ist der Vorderbacken 3 der Sicherheits-Skibindung 2 mit den Federelementen 37 die im vorliegenden Fall durch Federlappen bzw. Federarme oder Bügel gebildet sind, gezeigt. Zusätzlich kann zu den als Federlappen ausgebildeten Federelementen 37 auf der von einer vorderen Stirnseite 38 der Sohle 39 abgewendeten Seite jedem Federelement 37 ein weiteres Federelement 40 bzw. 41 zugeordnet sein. Dadurch kann die Vorspannung, die mit den Federelementen 37 in Richtung des Fersenbackens 5 ausgeübt werden kann, beliebig verändert werden. Außerdem ist es, wie schematisch durch eine unterschiedlich dichte Schraffur der Federelemente 40 und 41 angedeutet wurde, möglich, beispielsweise das Federelement 41 mit einer härteren Federcharakteristik also einer höheren Federkraft bzw. einem höheren Verformungswiderstand auszustatten. Damit können Auslenkbewegungen, die in Richtung einer Außenkante 43, wie sie vor allem beim Aufkanten des Skis bei schneller Kurvenfahrt auftreten, stärker gedämpft werden bzw. eine höhere Rückstellkraft auf den Skischuh 42 ausgeübt werden, als bei einer Verschwenkung des Vorderbackens 3 bzw. der Gabelschenkel 13 in Richtung einer Innenkante 44 des Ski 1 die dem weiteren Ski unmittelbar benachbart ist. Durch das Einspannen des Skischuhs zwischen dem Vorderbacken 3 und dem Fersenbacken 5 baut sich zwischen dem Federelement 23 im Fersenbacken und den als Zentrierelement dienenden Federelementen 37 bzw. Federelementen 40 und 41 ein Kräftegleichgewicht auf, welches zu einer Verformung der Federelemente 37 aus der in strichlierten Linien dargestellten Lage in die in vollen Linien dargestellten Lage sowie durch die Ausbauchung der Federelemente 40 und 41 ersichtlich ist. Der Ordnung halber sei hierzu lediglich erwähnt, daß zum besseren Verständnis der erfindungsgemäßen Funktion der Sicherheits-Skibindung 2 bzw. der zeichnerischen Darstellung die Proportionen einzelne Teile bzw. deren Verstellwege stark übertrieben bzw. maßstäblich verzerrt dargestellt wurden. So ist weiters ersichtlich, daß ein Radius 45, in welchem die Federelemente 37 im ungespannten Zustand angeordnet sind, größer ist als eine Distanz 46 zwischen den der Stirnseite 38 der der Sohle 39 zugewandten Federelemente 37 im entspannten Zustand und einen Mittelpunkt der Schwenkachse 9 des Vorderbackens 3. Durch die Verformung aufgrund der Federkraft des Federelementes 23 wird die Lage der Federelemente 37 verändert und damit auch ein Radius 47 vergrößert, wodurch die Abweichungen in Richtung einer Mittellängsachse 48 zwischen der Stirnseite 38 der Sohle 39 und den Federelementen 37 während ihrer gegenseitigen Abwälzung bei einer Relativverstellung zwischen der Sohle 39 und dem Vorderbacken 3 geringer wird.3 and 4 show the front jaw 3 of the safety ski binding 2 with the spring elements 37 which in the present case are formed by spring tabs or spring arms or brackets. In addition to the spring elements 37 designed as spring tabs, a further spring element 40 or 41 can be assigned to each spring element 37 on the side facing away from a front end face 38 of the sole 39. As a result, the pretension that can be exerted with the spring elements 37 in the direction of the heel shoe 5 can be changed as desired. In addition, as was indicated schematically by a different density of hatching of the spring elements 40 and 41, it is possible, for example, the spring element 41 with a harder spring characteristic, ie a higher spring force or a higher deformation resistance equip. This allows deflection movements which occur in the direction of an outer edge 43, as occur especially when the ski is edged when cornering quickly, or a higher restoring force can be exerted on the ski boot 42 than when the toe piece 3 or the fork leg is pivoted 13 in the direction of an inner edge 44 of the ski 1 which is directly adjacent to the other ski. By clamping the ski boot between the toe piece 3 and the heel piece 5, an equilibrium of forces builds up between the spring element 23 in the heel piece and the spring elements 37 or spring elements 40 and 41 serving as the centering element, which leads to a deformation of the spring elements 37 from the broken lines position shown in the position shown in full lines and by the bulge of the spring elements 40 and 41 can be seen. For the sake of order, it should only be mentioned that, for a better understanding of the function of the safety ski binding 2 according to the invention or the drawing, the proportions of individual parts or their adjustment paths have been greatly exaggerated or scaled distorted. It can also be seen that a radius 45, in which the spring elements 37 are arranged in the untensioned state, is greater than a distance 46 between the front side 38 of the spring elements 37 facing the sole 39 in the relaxed state and a center point of the pivot axis 9 of the toe piece 3. Due to the deformation due to the spring force of the spring element 23, the position of the spring elements 37 is changed and thus a radius 47 is increased, as a result of which the deviations in the direction of a central longitudinal axis 48 between the end face 38 of the sole 39 and the spring elements 37 during their mutual rolling a relative adjustment between the sole 39 and the toe 3 becomes less.

Wie aus Fig.4 besser zu ersehen ist, tragen die Federelemente 37 über ihre gesamte Länge vom Vorderbacken 3 nach vorne. Ist es erwünscht, eine höhere Vorspannwirkung der Federelemente 37 zu erzielen, so kann die frei vorkragende Länge der Federelemente 37 in vorteilhafter Weise auch entsprechend verkürzt werden.As can be seen better from FIG. 4, the spring elements 37 carry forward over their entire length from the front jaw 3. If it is desired to achieve a higher prestressing effect of the spring elements 37, the freely projecting length of the spring elements 37 can advantageously be shortened accordingly.

Selbstverständlich können die Federelemente 40 und 41 auch eine gleiche Federcharakteristik und somit bei gleichem Federweg eine gleiche Dämpfungskraft ausüben.Of course, the spring elements 40 and 41 can also exert the same spring characteristic and thus the same damping force with the same spring travel.

Durch die Verformung der Federelemente 37 aus der in strichlierten Linien gezeichneten entspannten, in die in vollen Linien gezeichnete gespannte Stellung, wird ein Abstand 49 zwischen zwei Berührungspunkten 50 zwischen der Stirnseite 38 der Sohle 39 und den Federelementen 37 auf eine Distanz 51 vergrößert. Durch die relativ weiche Federungscharakteristik der Federelemente 37 im Verhältnis zu einer Auslösefeder 52 mit welcher jene Auslösekraft und jener Auslöseweg festgelegt wird, bei welchen der Vorderbacken 3 seitlich frei wegschnappen kann und somit der Skischuh 42 aus der Skibindung gleiten kann.Due to the deformation of the spring elements 37 from the relaxed position drawn in dashed lines to the tensioned position drawn in full lines, a distance 49 between two contact points 50 between the end face 38 of the sole 39 and the spring elements 37 is increased to a distance 51. Due to the relatively soft suspension characteristics of the spring elements 37 in relation to a release spring 52 with which that release force and that release path is determined, in which the front jaw 3 can snap away laterally and thus the ski boot 42 can slide out of the ski binding.

Kommt es nun zu einer nur geringfügigen Ausschwenkbewegung im Sinne eines Doppelpfeils 53, so reagieren die Federelemente 37 sofort und versuchen eine Gegenkraft in Rückstellrichtung aufzubauen, sowie den Skischuh 42 zwischen den Gabelschenkeln 13 zu zentrieren. Ist die vom Schuh auf einen der Gabelschenkel 13 ausgeübte Druckkraft höher und kann durch die unterschiedliche Verformung der Federelemente 37 nicht aufgefangen werden, so wird der Gabelbacken 7 weiter in einer Richtung des Doppelpfeils 53 ausgelenkt, wodurch durch die gegengleiche Drehbewegung, wie bereits anhand der Fig.2 gezeigt, sich der Skischuh 42 nur mehr auf den in Bewegungsrichtung voreilenden Gabelschenkel 13 und auf dem von diesem weiter entfernten Federelement 37 abstützt.If there is now only a slight pivoting movement in the sense of a double arrow 53, the spring elements 37 react immediately and try to build up a counterforce in the return direction, and center the ski boot 42 between the fork legs 13. If the pressure force exerted by the shoe on one of the fork legs 13 is higher and cannot be absorbed by the different deformation of the spring elements 37, the fork jaw 7 is deflected further in a direction of the double arrow 53, as a result of which the opposite rotational movement, as already shown in FIG .2 shown, the ski boot 42 is only supported on the fork leg 13 leading in the direction of movement and on the spring element 37 which is further away from it.

In Fig.5 und 6 sind nunmehr die Stellungen des Gabelbackens 7 des Vorderbackens 3 bei einer geringfügigen Auslenkung aus einer Soll- bzw. Ruhelage und bei einer erheblichen Auslenkung des Gabelbackens 7 knapp vor der Auslösung des Freigabemechanismuses und dem Herausfallen des Skischuhs 42 aus der Sicherheits-Skibindung 2 dargestellt. Durch das Federelement 23 im Fersenbacken 5 wird die Sohle 39 des Skischuhs 42 gegen die Federelemente 55,56 gedrückt, die sich zwischen Gabelschenkein 57,58 befinden. Bei einer geringfügigen Auslenkung des Skischuhs 42 aus der Ruhelage 54 dreht sich der Skischuh um die fiktive Schwenkachse, die sich im Bereich des Schienbeins des Unterschenkels befindet. Demgemäß ist ein Radius eines Abrollkreises 59 entlang welchem sich die Stirnseite 38 des Skischuhs 42 bewegt von der Schuhgröße abhängig. Ausgehend von den durch die Verformung der Federelemente 55,56 befinden sich die der Stirnseite 38 des Skischuhs 42 zugewandte Seiten innerhalb eines Hüllkreises 60 mit einem Radius 47. Kommt es nun zu einer seitlichen Auslenkung des Gabelbackens 7, so verlagert sich der Berührungspunkt 50 des Federelements 55 in Richtung der Ruhelage 54, während sich der dem Federelement 56 zugeordnete Berührungspunkt 50 von dieser entfernt. Dies bewirkt, daß das Federelement 55, wenn in der Praxis auch nur um geringste Ausmaße stärker in Richtung der Schwenkachse 9 verformt wird, während sich das Federelement 56 um ein geringfügiges Ausmaß entspannen kann. Dadurch kommt es zu einer Differenzkraft in den beiden Berührungspunkten 50, die versuchen den Gleichgewichtszustand zwischen den in den beiden Berührungspunkten 50 angreifenden Druckkräften, die durch das Federelement 23 aufgebaut werden, wieder herzustellen.5 and 6, the positions of the fork jaw 7 of the front jaw 3 are just before the triggering of the release mechanism and the ski shoe 42 falling out of the safety with a slight deflection from a desired or rest position and with a considerable deflection of the fork jaw 7 - Ski binding 2 shown. The spring 39 of the ski boot 42 is pressed by the spring element 23 in the heel 5 against the spring elements 55, 56, which are located between the fork legs 57, 58. When the ski boot 42 is slightly deflected from the rest position 54, the ski boot rotates around the fictitious one Swivel axis, which is located in the area of the shin of the lower leg. Accordingly, a radius of a rolling circle 59 along which the end face 38 of the ski boot 42 moves depends on the size of the boot. Starting from the deformation of the spring elements 55, 56, the sides facing the end face 38 of the ski shoe 42 are located within an enveloping circle 60 with a radius 47. If the fork jaw 7 is laterally deflected, the contact point 50 of the spring element is displaced 55 in the direction of the rest position 54, while the contact point 50 assigned to the spring element 56 moves away from the latter. This has the effect that the spring element 55 is deformed more in the direction of the pivot axis 9, in practice, even by the slightest amount, while the spring element 56 can relax by a slight amount. This results in a differential force in the two contact points 50, which attempt to restore the equilibrium state between the pressure forces acting in the two contact points 50, which are built up by the spring element 23.

Aus der Darstellung in Fig.6 ist dann weiters zu ersehen, daß bei einer Zunahme einer Auslösekraft 61 die Sohle 39 des Skischuhs 42 weiter im Sinne des die Auslösekraft 61 symbolisierten Pfeils um die Schwenkachse 33 verschwenkt sodaß sich der Skischuh 42 nunmehr in einem Berührungspunkt 62 auf dem Gabelschenkel 58 direkt abstützt, der der Ausfederungsbewegung im Sinne der Auslösekraft 61 eine Gegenkraft 63 entgegensetzt, die durch die Auslösefeder 52 aufgebaut wird. Der Skischuh 42 ist in dieser Phase vorwiegend über die Auslösefeder den Gabelbacken 7 und den Gabelschenkel 58 sowie im Bereich des Fersenbackens 5 über diese abgestützt. Durch den außermittigen Angriff der Gegenkraft 63 gegenüber der Ruhelage 54 bzw. einer Schuhachse 64 hat die Schuhachse 64 des Skischuhs 42 nunmehr die Tendenz in Richtung der Ruhelage 54 auszuweichen, da aufgrund der Relativbewegungen durch das Abwälzen des Abrollkreises 59 auf dem Hüllkreis 60 zwischen der Stirnseite 38 um dem Gabelschenkel 57 ein Spalt 35 vorhanden ist. Um nun zu verhindern, daß der Skischuh seine Lage in Richtung der Schwenkachse 9 und somit relativ zum Fersenbacken und zum Ski verändert, wird durch die Federkraft 65, die mit dem Federelement 55 aufgebracht wird, eine Haltekraft 66, wie sie schematisch durch einen Pfeil angedeutet ist, aufgebaut, die ein seitliches Abweichen des Skischuhs 42 entgegen dieser Haltekraft 66 und somit gleichzeitig auch ein Ausweichen in Richtung der Schwenkachse 9 verhindert.It can also be seen from the illustration in FIG. 6 that when the triggering force 61 increases, the sole 39 of the ski boot 42 pivots further about the pivot axis 33 in the direction of the arrow symbolizing the triggering force 61, so that the ski boot 42 now pivots at a point of contact 62 is supported directly on the fork leg 58, which counteracts the rebound movement in the sense of the triggering force 61 with a counterforce 63 which is built up by the trigger spring 52. In this phase, the ski boot 42 is mainly supported via the release spring of the fork jaw 7 and the fork leg 58 and in the region of the heel jaw 5. Due to the eccentric attack of the opposing force 63 with respect to the rest position 54 or a shoe axis 64, the shoe axis 64 of the ski boot 42 now has the tendency to move in the direction of the rest position 54, since due to the relative movements due to the rolling of the rolling circle 59 on the enveloping circle 60 between the end face 38 around the fork leg 57 there is a gap 35. In order to prevent the ski boot from changing its position in the direction of the pivot axis 9 and thus relative to the heel cheek and changed to ski, the spring force 65, which is applied with the spring element 55, a holding force 66, as indicated schematically by an arrow, is built up, a lateral deviation of the ski boot 42 against this holding force 66 and thus at the same time also a dodging prevented in the direction of the pivot axis 9.

Der Vorteil dieser Ausbildung bzw. Anordnung liegt darin, daß dann, wenn die Auslösekraft 61 nicht ausreicht um den Auslösemechanismus freizugeben bzw. zu öffnen, der Skischuh 42 wieder exakt in seine ursprüngliche Ruhelage 54 zurückschwenken kann, da lediglich die Verformungskraft der Federelemente 55,56 zu überwinden ist, sodaß diese wieder beispielsweise die in Fig.3 in vollen Linien gezeigte Stellung einnehmen. Durch die Abstützung über den Berührungspunkt 62 am Gabelschenkel 58 und erst nach entsprechender Verformung und Aufbau einer Gegenkraft der Federelemente 55,56 teilt sich die dann im überwiegenden Maß nur vom Federelement 23 aufgebrachte Anpreßkraft wieder auf die beiden Federelemente 55 und 56 auf die, wie bereits vorstehend beschrieben, die Tendenz haben, den Skischuh 42 und den Gabel backen 9 aufeinander auszurichten bzw. zu zentrieren.The advantage of this design or arrangement is that if the release force 61 is not sufficient to release or open the release mechanism, the ski boot 42 can pivot back exactly into its original rest position 54, since only the deformation force of the spring elements 55, 56 is to be overcome, so that they again assume, for example, the position shown in full lines in FIG. Due to the support via the contact point 62 on the fork leg 58 and only after corresponding deformation and build-up of a counterforce of the spring elements 55, 56, the pressing force that is then predominantly applied only by the spring element 23 again divides onto the two spring elements 55 and 56, as already described above, have the tendency to align and center the ski boot 42 and the fork 9.

Desweiteren wurden die Vorderbacken 3 bzw. die Fersenbacken 5 in den Fig.3 bis 6 wesentlich vereinfacht und teilweise schematisch sowie teilweise maßstäblich verzerrt dargestellt, um die erfindungsgemäße Funktion der Federelemente besser darstellen zu können. In diesen Figuren wurde überwiegend die Ansicht von unten gewählt, sodaß diejenigen Teile des Gabelbackens 7, die die Stirnseite 38 des Skischuhs 42 übergreifen, die wichtigen Bereiche für das Zusammenwirken der Federelemente und der Stirnseite 38 nicht abdecken.Furthermore, the front jaws 3 and the heel jaws 5 in FIGS. 3 to 6 have been substantially simplified and shown partially schematically and partially to scale in order to better illustrate the function of the spring elements according to the invention. In these figures, the view from below was predominantly chosen so that those parts of the fork jaw 7 which overlap the end face 38 of the ski boot 42 do not cover the important areas for the interaction of the spring elements and the end face 38.

Im übrigen ist auch die Auslegung des Vorderbackens 3 keinesfalls an die in den Zeichnungen gezeigten Ausführungsbeispiele gebunden, sondern es können vielmehr auch Vorderbacken verwendet werden, die neben einer Auslösung um eine vertikale Schwenkachse 9 auch um eine dazu senkrecht und parallel zu einer Montagefläche 75 - Fig.4 - verlaufende Schwenkachse auslösbar sein.For the rest, the design of the front jaw 3 is in no way linked to the exemplary embodiments shown in the drawings, but rather front jaws can also be used which, in addition to being triggered about a vertical pivot axis 9, also about a perpendicular thereto and parallel to a mounting surface 75 - FIG .4 - trending Swivel axis can be triggered.

Die in den Fig.1 bis 4 beschriebenen, als Federlappen ausgebildeten Federelemente 37 wirken ebenso als Zentrierelemente, wobei die Funktion der Zentrier- und Federelemente dann vereinigt ist, wenn die Federwirkung durch die Werkstoffeigenschaften bzw. die Ausbildung der Zentrierelemente wie im Fall der Darstellung der Fig.1 bis 4 erzielt wird.The spring elements 37 described in FIGS. 1 to 4, designed as spring tabs, also act as centering elements, the function of the centering and spring elements being combined when the spring action is due to the material properties or the design of the centering elements, as in the case of the illustration of FIG Fig.1 to 4 is achieved.

Wie weiters in Fig.3 gezeigt ist, ist ein parallel zur Montagefläche 75 verlaufender Abstand 49 zwischen zwei Berührungspunkten 50 kleiner als eine Hälfte einer Breite 76.As is further shown in FIG. 3, a distance 49 between two contact points 50 that runs parallel to the mounting surface 75 is less than one half of a width 76.

Als bevorzugt hat es sich unter anderem herausgestellt, wenn dieser Abstand in etwa zwischen 5 mm und 25 mm, bevorzugt 10 mm beträgt.It has proven to be preferred, among other things, if this distance is approximately between 5 mm and 25 mm, preferably 10 mm.

Im übrigen ist noch festzuhalten, daß die Federelmente 37 bzw. die Federlappen 36 mit reibungsmindernden Belägen, beispielsweise Gleitschichten aus Teflon, zumindest in jenen Bereichen angeordnet sind, an welchen der Skischuh zur Anlage kommt. Dies betrifft vor allem die Berührungspunkte 50 und 62. So ist es auch möglich, auf die frei vorkragenden Enden der Federlappen Gleithülsen aufzuschieben.It should also be noted that the spring elements 37 or the spring tabs 36 with friction-reducing coverings, for example sliding layers made of Teflon, are arranged at least in those areas where the ski boot comes into contact. This applies above all to the points of contact 50 and 62. It is also possible, therefore, to slide sliding sleeves onto the freely projecting ends of the spring tabs.

Claims (6)

  1. Safety ski binding with a toe clamp (3)comprising a forked clamp (7) guiding a ski boot (11) in the front sole area and formed as a sole holder, and with a heel clamp (5) comprising a forked clamp (17) guiding the ski boot (11) in the area of the heel in a swing action of the forked clamp (7) of the toe clamp (3), and with two spring devices (37, 55, 56) arranged on the toe clamp (3) and/or the heel clamp (5), which are bent in a circle and are rigid but essentially resiliently adjustable parallel to the central longitudinal axis (48) which connects the front clamp to the heel clamp (3, 5), and which are arranged on both sides of the central longitudinal axis (48) and consist of a resilient material, particularly plastic, and are formed as an integral unit with the toe clamp (3) and/or the heel clamp (5), whereby the mid point of an enclosure circle (60) of the spring devices (37, 55, 56) which are bent in a circle, is arranged on the central longitudinal axis (48) characterized in that the radius (45, 47) of the enclosure circle (60) is larger than the distance (46) between the swing axis (9) of the forked clamp (7) and the front sides of the spring devices (37, 55, 56) facing towards the heel clamp (5), and that a distance (49) extending transversely to the central longitudinal axis (48) of contact points (50) of the spring devices (37, 55, 56) with the ski boot sole is less than half the width (76) of the forked clamp (7).
  2. Safety ski binding according to claim 1, characterized in that the spring strength of the spring devices (37, 55, 56) of the toe clamp (3) and the spring device (23) of the heel clamp (5) are of the same measure, in particular about equal.
  3. Safety ski binding according to claim 1, characterized in that the spring strength of the spring device (37, 55, 56) of the toe clamp (3) is less than the spring strength of the spring device (23) of the heel clamp (5).
  4. Safety ski binding according to one or more of claims 1 to 3, characterized in that the spring devices (37, 55, 56) are supported by further spring devices (40, 41), in particular by interchangeable rubber and/or plastic inserts in the front and/or heel clamps (3, 5).
  5. Safety ski binding according to one or more of claims 1 to 4, characterized in that the distance (49) running transverse to the central longitudinal axis (48) between the contact points (50) is generally in the range of 5 mm to 20 mm, preferably 10 mm.
  6. Safety ski binding according to one or more of claims 1 to 5, characterized in that a spring strength of further spring elements (40, 41) associated with one of the spring devices (37) is less than the spring strength of the spring device (23) on the heel clamp (5).
EP89904498A 1989-02-21 1989-04-18 Safety ski binding Expired - Lifetime EP0413702B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3905293 1989-02-21
DE3905293A DE3905293C2 (en) 1988-04-07 1989-02-21 Safety ski binding
PCT/AT1989/000038 WO1990009820A1 (en) 1989-02-21 1989-04-18 Safety ski binding

Publications (2)

Publication Number Publication Date
EP0413702A1 EP0413702A1 (en) 1991-02-27
EP0413702B1 true EP0413702B1 (en) 1994-06-29

Family

ID=6374590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89904498A Expired - Lifetime EP0413702B1 (en) 1989-02-21 1989-04-18 Safety ski binding

Country Status (5)

Country Link
EP (1) EP0413702B1 (en)
JP (1) JPH03504087A (en)
AT (2) AT403254B (en)
AU (1) AU3420089A (en)
WO (1) WO1990009820A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402608B (en) * 1990-12-21 1997-07-25 Varpat Patentverwertung CLUTCH DEVICE BETWEEN A SKI BOOT CLUTCH DEVICE BETWEEN A SKI BOOT AND A SKI AND A SKI

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8223875U1 (en) * 1982-12-02 ess GmbH Skibindungen, 8978 Burgberg Ski binding
AT275373B (en) * 1967-01-27 1969-10-27 Smolka & Co Wiener Metall Safety bindings
DE2329856A1 (en) * 1972-07-03 1974-01-24 Gertsch Ag SKI BINDING PART
AT318447B (en) * 1972-10-09 1974-10-25 Smolka & Co Wiener Metall Ski binding part
FR2458299A1 (en) * 1979-06-06 1981-01-02 Salomon & Fils F SECURITY FASTENING FOR SKI
FR2471795B1 (en) * 1979-12-21 1985-05-31 Look Sa SKI ATTACHMENT FRONT
AT377707B (en) * 1983-06-30 1985-04-25 Tyrolia Freizeitgeraete FRONT JAW
DE8804613U1 (en) * 1988-04-07 1988-07-14 ess GmbH Skibindungen, 8970 Immenstadt Safety ski binding

Also Published As

Publication number Publication date
WO1990009820A1 (en) 1990-09-07
AU3420089A (en) 1990-09-26
JPH03504087A (en) 1991-09-12
ATA903689A (en) 1997-05-15
ATE107870T1 (en) 1994-07-15
EP0413702A1 (en) 1991-02-27
AT403254B (en) 1997-12-29

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