EP1919575B1 - Arrangement consisting of a ski binding and a ski boot - Google Patents

Description

The invention relates to an arrangement according to the preamble of claim 1.

Cross-country bindings with rigid axles fastened in the shoe, which are mounted predominantly in the toe area and are pivotably mounted around an axis transverse to the ski by means of an articulated connection mounted on the ski side, are known in various embodiments. With this design, it is possible for the front end of the ski boot to be retained on the ski during cross-country skiing or downhill telemarking, while the rear end of the ski boot can be freely raised. A bond of this kind is for example by the EP 0 424 479 known. This binding uses a substantially flat shoe sole. This is therefore necessary to be able to position the pivot point of the pivoting close to the sole footprint.

It is generally known that flat shoe soles are disadvantageous from an ergonomic point of view for normal walking, since a natural rolling movement is prevented.

It is also a further feature of these shoe-binding systems that the shoe sole in the tip region has a corner-shaped configuration, which serves to receive the anchored in the shoe sole rigid rotation axis. This training is also an obstacle during normal walking, since the rolling movement takes place around an unnatural tilting edge.

Executions, as for example from the WO 84/03225 Although they allow a natural rolling motion while walking, however, the connection to the ski by means of flexible, leaf-shaped connection is no longer timely, since this does not reach the lateral and torsional stability required for cross-country skiing.

An arrangement of the type mentioned is characterized by the WO 01/93963 known.

This arrangement allows a rolling movement of the foot on the ski during skiing and also an anatomically correct rolling of the foot during normal walking. The disadvantage of this embodiment lies in the complex and high-cost production of the system. In addition, at proposed solution, the freedom of movement (raising the heel) limited by a positioned under the toe cushioning element.

By the US Pat. No. 6,209,903 B1 a fastening system is described which connects a shoe to a ski and ensures a limited opening angle. Thus, the task of this document is a completely different than in the subject invention. Another feature of this document is that the rear engaging element must be flexible or at least elastically supported, resulting in further instability and increased manufacturing costs.

By the FR 2 741 543 has become known a compound that meets the requirements for a correctly executed anatomically correct sole of the shoe. The disadvantage here is the connection in the area of the toe base joint with the execution of a damper element under the toe area, as this also leads to a restriction of the necessary heel lift. In addition, the cross-country skier feels insecure when shifting his weight to the rear, because the shoe is not fixed under the toe.

Object of the present invention, while avoiding the disadvantages of the known constructions, with anatomical aspects correct execution of the shoe sole to create a cheap yet stable connection to cross-country skis.

This object is achieved by, the measure according to the characterizing part of claim 1. As a result, costly and expensive kinematics are dispensed with in the simplest way. The basis is a simple rotation about a fixed axis in the area of the toe, which is currently the standard for all standard cross-country bindings.

Further advantages of the invention will become apparent by the measures according to claims 2 to 10.

The invention also provides a cross-country boot for the binding according to the invention, which corresponds to the orthopedic requirements.

An embodiment of the inventive arrangement is shown in the accompanying drawings.

• Fig. 1 eine Seitenansicht eines Langlaufschuhs, bei welchem das Prinzip der Verbindung zwischen Schuh und Bindung angedeutet ist;
• Fig. 2 eine bekannte Ausführungsform eines Langlaufschuhs mit einem eckenförmig vorspringenden Teil der Schuhsohle;
• Fig. 3 einen Längsschnitt durch den Spitzenteil eines nicht zum Umfang der Erfindung gehörigen Langlaufschuhs mit einem Spannhaken;
• Fig. 4 und Fig. 4.1 einen ähnlichen Längsschnitt mit einem erfindungsgemäßen drehbaren Haken als Spannelement in verschiedenen Stellungen des Langlaufschuhs;
• Fig. 5 den Spitzenbereich einer Ausführungsform der Schuhsohle;
• die Fig. 6 bis 8 eine weitere Variante der spitzenseitigen Bindungseinheit in axialem Längsschnitt in der Schließstellung, in Druntersicht sowie in einem axialen Längsschnitt in Offenstellung;
• die Fig. 9 bis 11, 12 bis 14 und 15 bis 17 jeweils in ähnlichen Darstellungen wie in den Fig. 6 bis 8 weiterer Varianten der spitzenseitigen Bindungseinheit; und
• Fig. 18 eine weitere Variante des spitzenseitigen Bindungsteiles im Längsschnitt.

In a simplified representation:

• Fig. 1 a side view of a cross-country boot, in which the principle of the connection between shoe and binding indicated is;
• Fig. 2 a known embodiment of a cross-country ski shoe with a corner-shaped projecting part of the shoe sole;
• Fig. 3 a longitudinal section through the tip portion of a not belonging to the scope of the invention cross-country boot with a clamping hook;
• Fig. 4 and Fig. 4.1 a similar longitudinal section with a rotatable hook according to the invention as a tensioning element in different positions of the cross-country ski shoe;
• Fig. 5 the tip portion of an embodiment of the shoe sole;
• the Fig. 6 to 8 a further variant of the tip-side binding unit in axial longitudinal section in the closed position, in Druntersicht and in an axial longitudinal section in the open position;
• the Fig. 9 to 11 . 12 to 14 and 15 to 17 each in similar representations as in the Fig. 6 to 8 further variants of the tip-side binding unit; and
• Fig. 18 a further variant of the tip-side binding member in longitudinal section.

In the figures, 1 denotes a cross-country ski, which at the tip side by a binding unit 2 ( 3 and 4 ) is connectable to the ski, which has at least, in the present case, three fixed points, the in Fig. 1 a rectangular triangle with the fixed points 4, 5 and 6 reproduce, which is not mandatory. The proposed system is pivotable about the fulcrum fixed point 4, which, as in the present case, preferably in the corner of the imaginary triangle with the largest internal angle, in the illustrated embodiment with a right triangle 90 °. As Fig. 1 shows, the two cathets point from the pivot point in the direction of the sole connection points. The hypotenuse is generated by the imaginary path between the two sole attachment points. The binding element thus becomes practically a part of the shoe sole during cross-country skiing. This usable for cross-country skiing, or the relevant area of the sole with the fulcrum near the soles / Skiaufstandsfläche, compared to the current cross-country ski shoe with embedded axis of rotation, as in Fig. 2 illustrated, the advantage that the used for cross-country part of the sole for free walking can be decoupled and thus a natural rolling movement is not a hindrance.

A major advantage of the proposed solution, however, is that the pivot point of the system without increasing the Stand position can be placed under the soles / ski footprint. This is advantageous because the rolling movement is the easier to carry out, the lower the pivot point, based on the soles / Skiaufstandsfläche lies.

Another advantage of the proposed solution is that the fulcrum can be placed under both the toe and a few millimeters behind it, depending on the design, so as to bring about further positive effects on the rolling motion during cross-country skiing.

The invention includes the essential idea that the function of normal walking without skis and the function of cross-country skiing are separated from each other. The movement of the sole when walking without skis corresponds to a kinematics combined of rotation and translation, whereas the movement of the sole during cross-country skiing is carried out by means of simple rotation.

The connecting point 5 in the ball area of the ski boot sole 7 and the anchoring point 6 in the area of the ski boot tip for connecting the cross-country boot 1 to the binding unit 2 are not at the same time rotational points, but serve only the rigid and therefore stable connection of the rotationally mounted binding unit to the shoe sole 7 ,

The binding element 2 consists essentially of three parts, namely acting as a hinge axis of rotation 4 ', a front retaining element 9 and a holding element, not shown. The axis of rotation 4 'or the hinge joint, which coincides with the pivot point 4, can be fixedly or detachably connected to the ski 3.

The front holding element 9 can be latched by means of a commercially available clamping hook 10 on a tip-side sole extension 11, which is formed as a tip-side protruding step.

In a modification of this embodiment of the retaining element 5, as Fig. 4 shows, a rotatable about the axis of rotation 4 hook 12 is provided, which is preferably pressed by a torsion spring 13 against the sole extension 11. Here, the hook surface 14 may be designed so that the binding can also be executed as a step-in binding. To facilitate this step-in function, it is particularly advantageous if the hook element 16 in the open state by a certain amount x of the ski surface kept distanced.

This feature of the invention becomes, as in Fig. 4.1 shown, characterized in that the hook element 16 by a spring element 16 ', this may have any shape, such as a torsion spring, pivoting spring or, for example, a rubber-elastic member to a measure x pushed away from the ski surface and held in this position.

It is thereby achieved that with the shoe 1, which moves when entering the binding in the direction of the arrow A, with its axis 17, can be entered much easier into the binding.

The length of the front retaining element 9 is dependent on the height of the outer toe blasting 15. The higher the outer toe blasting 15, the longer the front retaining element 9 must be made.

The rear support member 16 and the rear connection is, as in the 3 and 4 is shown performed by means of a hook member 16 which engages in an in the sole side preferably by injection molding rigidly anchored axis 17, which corresponds to the connection point 5 mentioned above. The hook element 16 is rigid or rigid so not flexible and pivotable about the axis 4 '. It has near the axis of rotation or the hinge 4 'on a bead 18, which serves to support the front located near the shoe tip sole surface. This bead 18 is at the same material balance between the rounded by the outer toe blasting 15 sole and the more level Skioberfläche 3. Alternatively, the rear hook member 16 also fully over the sole surface abut (without special bead formation).

While in the embodiment according to Fig. 4 the hook 12 is pivotable about the hinge 4, is after Fig. 3 the tension hook 10 is formed as a two-armed pivot lever, which is connected to a lever formed between its longer, designed as an actuating lever and the shorter, designed as a latch arm at both ends hingedly connected. Finally, the binding element 2 may for example be equipped with a leg spring, which dampens and / or limits the pivoting of the shoe sole. This leg spring can according to the invention at the same time take over the function of the torsion spring 13. In this case, the task of pressing the rotatable hook 12 and the damping / limiting the pivoting of the shoe sole of only one machine structural element perceived.

The toe blast 15 causes the shoe sole to conform to orthopedic requirements, meaning that the sole has a rounded shape from the point of bale support toward the toe.

The longitudinal axis 17 is preferably about 4 cm behind the toe and can be embedded in a transverse to the running direction groove, as already mentioned, by injection molding. The rear hook element 16 extends substantially from the pivot point or the hinge 4 'in a longitudinal center groove to the axis 17, which has the advantage that the rear hook element can absorb transverse forces on the adjacent lateral inner walls of the longitudinal center groove, which contributes to a substantial stabilization of the overall system.

The sole extension 11 can, as in Fig. 5 is shown, be equipped with a groove 21 which can receive in transverse engagement with the front retaining element 9 transverse forces and thus serves for lateral stabilization of the system.

Due to the inventive design of the binding unit 2, there is no Standerhöhung compared to currently conventional systems.

In the further illustrations of the various embodiments of the tip-side binding unit according to the 6 to 18 denotes a 30 to be fixed to the ski, for example by means of screws base plate, for which this has at least two, preferably three or four holes 31, which can be arranged distributed arbitrarily. The base plate 30 has in its longitudinal center an upwardly extending projection 32 with a transverse to the ski axis extending hole 33 for receiving the axle 4, which surrounds the fields 13 at least over part of its circumference.

In the embodiment of the Fig. 6 to 8 is a lever 34 rotatably mounted on the axis 4, which carries the hook member 16 which forms an angle-shaped pivot lever with a lever 34. The serving for receiving the shoe axis hook element 16 consists of canted spring steel. In this hook member 16, the spring 13 is installed, which preferably the axis 4 encloses with 5 1/4 turns and at rest, the hook member 16 presses against the ski and the latter biases, so that when entering the shoe with the toe behind the undercut 35 of the lever 34 on the shoe, a force is applied, causing him in the binding is held. In addition, the spring ensures 13 during cross-country when lifting the foot against the tipping over of the skier forward resistance. The tilt angle is in the present case preferably 60 °.

In the embodiment of the Fig. 9 to 11 is in a modification of the preceding embodiment, the hook member 16 provided at its end facing away from the hook 12 with a sole contour corresponding arc 36 and folded at the ends, so that an angle directed against the ski 37 is formed, which has a hole 38 for insertion of the ski pole, to open the bond. Due to the angle 37 forming edge lateral stability is achieved. This embodiment allows a narrow construction and offers the advantage that the retaining force is effected only by the material deformation of the spring plate of the hook element 16. In addition, it is achieved in this construction that the entire holding and guiding mechanism can be accommodated in the groove of the shoe sole and is invisible.

In the variant of the Fig. 12 to 14 is the same principle as in the embodiment of the Fig. 6 to 8 present, wherein the axis 4 may possibly be a rivet or screw piece to hold the bond together. In contrast to the two last-described variants, in the present case the hook element 16 forming the retaining mechanism is made of spring steel and bent upwards at its end and spirally surrounds the shaft 4 to form the spring element 13. This variant results in a stable construction due to the possibility a larger binding width. In addition, the production is cost-saving, since you get the spring element 13 with the hook member 16 as a semi-finished product. The holding force is achieved by deformation of the material of the hook element 16 when entering the binding, the opening of which is effected by inserting the ski pole in the trough 39 of the lever 34. To prevent the skier overturning, a spring can be installed in the axle 4 or under the Shoe one in Fig. 12 be indicated by dashed lines plastic part, which consists of a two-component injection molding, namely a damping causing very soft and a hard component for holding the shoe exists.

The variant after the 15 to 17 is essentially based on the same principle as the variant according to the Fig. 9 to 11 , with the difference that the construction is constructed so that it is not to be embedded in the interior of the groove of the shoe sole, as it is made wider for stability reasons. In the subject variant, the hooked element consisting of folded spring plate 16 is supported in the region of its Aüskröpfung, which is provided on the hook 12 for receiving the retaining bolt in the tip region of the ski boot sole end facing away from the hook element 16, above the axis 4 on the spring 13 from , By guiding the hook element 16 above the axis 4, a particularly stable construction is achieved, in which the holding of the ski boot achieved via the deformation forces of the hook member 16 and the tipping over of the skier by the built-in torsion spring 13 is prevented.

The variant after Fig. 18 is based on the same principle as the variant according to the Fig. 6 to 8 and shows a construction to be produced with little effort, wherein the same reference numerals are used for the same components. The difference compared to the variants described is that the hook element 16 are mounted with its hook 12 for holding the shoe tip axis and the lever 34 separated from each other, wherein the lever 34 pivotally mounted about a stationary axis 41 and by a spring 42, in the present case a torsion spring is biased to hold the shoe in the closed position. The spring 13, also a torsion spring, acts on the hook 12 facing away, substantially straight expiring end of the hook element 16th

Of course, various structural modifications can be made within the scope of the invention. Thus, instead of the torsion spring 13, a plastic part preferably occurs as a two-component injection molding to achieve the effect of an elastomeric damper.

Claims (14)

1. An arrangement consisting of a ski binding (2) and a ski boot (1) including a boot sole (7), wherein the boot sole (7) and the ski binding (2) are connected by a retaining element with at least three fixed points arranged in the corners of a triangle, wherein the boot sole is pivotable, during the lifting of the heel, via a pivotable movement about an axis located on the upper side of the ski in the region of the tip of the boot as a first fixed point (4), wherein a rear retaining element is provided as a second fixed point (17) in the region of the ball of the foot, and the third fixed point (6) serves for coupling the ski binding (2) with the ski boot (1), characterized in that the front retaining element is designed as a hook element (12) which is loaded by a spring (13) pressing the hook element (12) against the tip of the boot sole.
2. An arrangement according to claim 1, characterized in that the fixed points are arranged in the corners of an imaginary, rectangular triangle, wherein the third fixed point (6) provided for coupling the ski binding with the ski boot is designed as a hook element (12) overlapping the tip of the ski boot sole.
3. An arrangement according to claim 2, characterized in that the pivot point (4) is located in the corner having the largest interior angle.
4. An arrangement according to claim 1, characterized in that the ski binding is comprised of a three-part binding unit (2) including a front and a rear retaining element (12 and 16, respectively) each designed as a hook element as well as a hinge arranged therebetween and forming an axis of rotation (4).
5. An arrangement according to claim 2, characterized in that the two legs of the imaginary triangle are oriented from the pivot point (4) in the direction towards the sole connection point, wherein the hypotenuse is generated by the imaginary distance between the two sole connection points.
6. An arrangement according to claim 1, characterized in that the retaining element (16) is made of spring steel, pivotable about a stationary axis (4) extending transversely to the longitudinal axis of the ski, and loaded by a spring (13) wound around the same.
7. An arrangement according to claim 6, characterized in that the retaining element (16) is designed as an angle lever which is pivotable about a stationary axis (4) and comprises an undercut (35) facing the hook (12) for holding the tip of the boot.
8. An arrangement according to claim 6, characterized in that the retaining element (16) encloses the axis (4) as a biasing spring.
9. An arrangement according to claim 6, characterized in that a lever (34) separated from the retaining element (16) is provided with an undercut (35) for retaining the sole of the ski boot, said lever being mounted so as to be pivotable about a separate, stationary axis (41) and being spring-loaded (42) to keep the ski boot in the closed position.
10. A ski boot for a ski binding according to claim 4, characterized in that the sole has a rounded sole surface and, in the region of the sole tip, comprises a stepped extension (11) projecting in the running direction for supporting the front retaining element (12), said stepped extension being provided with a groove (21) for absorbing transverse forces in hooked engagement with the front retaining element (12).
11. A ski boot according to claim 10, characterized in that the sole (7) of the ski boot has a rounded shape starting from the ball contact point forwardly in the direction to the tip of the ski boot, i.e. forms a toe spring (15).
12. A ski boot according to claim 10, characterized in that the sole (7) of the ski boot comprises a longitudinally extending central groove for receiving the hook element of the rear retaining element (16).
13. A ski boot according to claim 10, characterized in that the sole (7) of the ski boot comprises a groove extending transversely to the running direction, in which an axis (17) is embedded, preferably by injection-molding, which serves as an anchorage point for the hook element (12) of the rear retaining element (16).
14. An arrangement according to claim 12, characterized in that the retaining element (16) of the ski binding in the opened state is pressed upwards from the upper surface of the ski (3) by a measure x by a spring element (16') and held in that position by the same.

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