EP0214201A1

EP0214201A1 - Device for cross-country ski binding.

Info

Publication number: EP0214201A1
Application number: EP86901389A
Authority: EP
Inventors: Alfred Brandhuber
Original assignee: TMC Corp
Current assignee: TMC Corp
Priority date: 1985-02-22
Filing date: 1986-02-21
Publication date: 1987-03-18
Anticipated expiration: 2006-02-21
Also published as: US4758016A; EP0214201B1; DE3668559D1; FI864179A; FI864179A0; WO1986004825A1

Abstract

Une fixation pour un ski de fond permettant de fixer la chaussure (2) au ski (7) au moyen d'un dispositif avec un composant de fixation (3) dans le but de permettre le pivotement latéral du pied autour d'un axe (1) diagonal par rapport aux mouvements de déplacement vers l'avant du ski. L'axe du mouvement passe par un point situé sur le côté inférieur du ski (4) relativement éloigné de la pointe (8) du ski et par un point situé sur le côté extérieur du ski (5) qui est plus près de la pointe (8) du ski. Ainsi l'axe de rotation (1) se situe de préférence sous l'axe hypothétique de rotation (6) des articulations métatarsophalangiennes, montant vers l'extérieur d'une valeur égale à un angle compris entre 5o et 20o par rapport à la surface supérieure du ski.A binding for a cross-country ski making it possible to fix the boot (2) to the ski (7) by means of a device with a binding component (3) in order to allow the lateral pivoting of the foot around an axis ( 1) diagonal to the forward movement movements of the ski. The axis of the movement passes through a point located on the lower side of the ski (4) relatively distant from the tip (8) of the ski and by a point located on the outside side of the ski (5) which is closer to the tip (8) skiing. Thus the axis of rotation (1) is preferably located under the hypothetical axis of rotation (6) of the metatarsophalangeal joints, rising towards the outside by a value equal to an angle between 5o and 20o with respect to the surface. superior of skiing.

Description

Device for fixing a cross-country ski boot on a cross-country ski

The invention relates to a device comprising a binding element for fixing the cross-country ski boot on a cross-country ski, by means of which the foot can be pivoted about an axis that is oblique to the longitudinal direction of the ski during the running movement.

Such a device describes, for example, DE-OS 33 15 641 and is used to improve the directional stability of the cross-country ski in conventional cross-country skiing in the diagonal step. For this purpose, the two swivel axes of the pair of ski converge towards the front, i.e. their imaginary intersection is closest to the ski tips. When lifting the foot in a diagonal step, in which the sequence of movements resembles that in normal walking or running movement, the inclined pivot axis means that the foot can follow the natural sequence of movements approximately without torque on the one running in the track or the rear of it ¬ exercising lifted ski, whereby a slight inclination of the sole of the foot obliquely outwards is not particularly disturbing.

A swiveling outward tilting movement moves the toes outwards, the heel somewhat inwards and the knee somewhat outwards. Such a displacement of the body part is, however, contrary to the anatomical movement sequence in a skating step, as must also be used according to the conventional cross-country skiing technique. Especially in the push-off phase, an outward tilting movement of the foot is extremely unfavorable. The invention has now set itself the task of creating a device of the type mentioned, which accommodates the sequence of movements especially in the one-sided or double-sided skate step.

According to the invention, this is now achieved in that each axis runs from the intersection on the inside through a point on the outside that is closer to the ski tip than the intersection of the axes.

The main advantages of this arrangement for the skate step lie in the overall inward pivoting of the turned leg, and thus in the ergonomically more favorable position of the force introduction point, in an increase in the push-off pressure and / or in an extension of the push-off phase, the stress and the risk of injury to the foot, leg and hip joints are reduced at the same time. But also in the conventional diagonal step, if, as is preferably provided for, that the axis extends at an angle between 5 ° and 20 ° to the ski surface, this pivot axis arrangement causes the heel to shift inwards, while the knee area remains essentially in the same position . The knee is also displaced outwards relative to the heel.

In a preferred embodiment it is provided that the Aclase runs in the area below the imaginary axis of rotation of the basic toe joints of the foot located in the cross-country ski boot. The axis is primarily designed as a physical axle pin.

This makes the formation of shoes with a sole adapted to the rolling movement of the foot superfluous, so that in further preferred embodiments the sole of the cross-country shoe can be designed to be roll-resistant and / or torsion-resistant. The roll-resistant design of the shoe sole leads to relief of the basic toe joints and the associated muscles, and the torsional stiffness results in a much better transmission of the lateral forces. Cross-country skiing can be improved and the previous assembly of guide ribs and heel plates on the ski can be omitted.

Since a binding element is inevitably required for fixing a shoe on a ski, there are various possibilities for arranging the axis. In a first preferred it is provided that the axle or the axle bolt runs through the sole of the cross-country ski boot, in which at least one bore is aligned with the axle. This embodiment can be realized very easily, in particular, if the sole is designed so that it is resistant to rolling, since it can then be provided in the necessary or arbitrary thickness. A thick shoe sole is an advantage anyway, since friction losses can be reduced both when using the edges in the skate step and in the deep lane during the diagonal step.

A second equivalent version provides that the

Axis or the axle bolt runs through the cross-country ski, in which at least one bore aligned with the axis is formed.

In both versions, a preferred embodiment is that the axle pin protrudes from the bore on both sides and engages in the binding element. A binding element suitable for fixing the axle bolt can be constructed very simply. If, for example, U- or V-shaped receptacles are formed in the binding element for the protruding ends of the axle bolt, its fixing by spring-loaded locking bolts which close the U-shaped receptacles after insertion of the axle bolt is conceivable. The axis bolt in the binding element can be secured against rotation by that the projecting ends are angular.

Furthermore, it can be provided that the axle bolt consists of two semi-axles which are arranged in the binding element and can be inserted into the bore. According to this embodiment 5, the mere formation of a hole or two blind holes is required in the sole or in the ski, while the semiaxes are arranged or articulated, for example, in lateral guides of the binding element, and can be inserted or pivoted into the holes.

0 To limit the lifting angle, a preferably adjustable stop can be provided on the binding element. Furthermore, an elastically compressible insert, usually in the form of a wedge, can also be provided in the swivel space, which effects damping at the angle limiting stop and 5 facilitates the return to the basic position. Furthermore, the elastically compressible insert holds the ski against the shoe when the foot is raised.

Finally, it can be advantageous if the axis can be arranged in several positions in the area between the tip of the shoe and the imaginary axis of rotation of the basic toe joints. Such an embodiment is particularly advantageous when larger distances are also or exclusively run in a diagonal step, as a result of which the usual positioning of the swivel axis is achieved. During the skating step, the center of gravity of the shoe is shifted through the axis lying under the basic toe joints, so that the shovel of the ski is lifted more easily. The invention will now be described below with reference to the figures of the accompanying drawings, without being restricted thereto.

Show it:

1 is a schematic plan view of a pair of chips with the device according to the invention, 2 seen the swivel axis arrangement in the running direction,

Fig. 3 is a schematic plan view of a pair of skis in

Skating step position,

4 shows an end view of a right-hand cross-country shoe of a first embodiment,

5 shows a schematic top view of the front shoe section,

Fig. 6 is a side view of the front shoe section with binding element, Fig. 7 is a plan view of the front shoe section with

Binding element according to Fig. 6,

Fig. 8 is a schematic plan view of a front

5 in a second embodiment, FIG. 9 is a side view of the second one corresponding to FIG. 6

Execution,

Fig. 10 is a plan view corresponding to FIG. 7 of the second

Execution,

11 is an end view of a shoe according to FIG. 8 with a binding element of a third embodiment,

12 is a side view of the third embodiment corresponding to FIGS. 6 and 9,

13 shows a top view of the third embodiment corresponding to FIGS. 7 and 10, FIG. 14 shows a pivot axis arrangement corresponding to FIG. 2, the axes passing through the pair of chips, and

15 is a schematic side view of the embodiment according to FIG. 13.

1 shows a top view of a pair of cross-country skis 7, 3 cross-country shoes 2 being pivotally arranged about axes 1 in schematically arranged binding elements 3. As can be seen from FIG. 2, the imaginary intersection 9 of the two axes 1 lies between the inner sides 4 of the shoes 2, and the two axes 1 rise at an angle. towards the outside 5, with each outer point of the axes 1 closer to the ski tips 8 than their section point 9 lies. The two axes 1 thus converge backwards and downwards and run in the region of the toe basic joints, the imaginary axes of rotation of which are designated by 6. Since conventional binding elements are mounted in such a way that the toes of conventional cross-country shoes come to lie approximately in the center of gravity in the middle of the ski, as a result of which the pivot axis also runs there, with approximately the same arrangement of the converging axes 1 in the device according to the invention, the toes 17 are over the middle of the ski laid in front. Since the lifting movement of the heel 16 from the ski preferably counteracts an elastic, slightly compressible damping element 19 (FIGS. 6, 9, 11), the center of gravity in the cross-country ski 7 shifts somewhat to the front due to the offset shoe tips 17, as a result of which in the skate step Lifting the ski, and especially the shovels, is made easier at the end of the push-off phase.

3 shows a schematic top view of the pair of skis in the skating step. Especially from this illustration it can be clearly seen that the heel of the repelling right foot can be lifted off the ski due to the pivoting about the inclined axis 1 and can be more natural and closer to a natural joint movement than when pivoting about the axis 6 or an axis parallel to it is given by the toe 17. It can also be seen that an axis arrangement according to the aforementioned DE-OS 33 15 641, which runs from the inside, top, front to the outside, bottom, back is hardly suitable for the skating step.

Axes 1 close with the longitudinal axis of the shoe in the

Projection on the ski surface preferably an angle of 70 ° - 86 ° and with the ski surface an angle of 5 ° - 20 °. 4 to 7 show a first embodiment. A right shoe 2 is equipped with a thickened sole 12, which in the middle of the width of the cross-country ski has a web 20 which is free on both sides in the toe region. The web 20 is provided with a bore 13, through which the axis 1 runs, and in which an axle bolt 10 is inserted, which has triangular round sections projecting on both sides. The web 20 is inclined to the toe 17 so that a wedge-shaped space towards the binding element 3 remains free according to FIG Material is used. The shoe 2 can thus be pivoted about a slight resistance about the axis 1. The binding element 3 has two parallel longitudinal slides 21 which can be actuated via a pivoting lever 23 and are provided with tongues 22 at the rear ends. In the sliding guide 25 there are V-shaped recesses 24 into which the projecting end sections of the axle pin 10 are inserted. After actuation of the lever 23, the tongues 22 overlap the end sections and fix cylindrical axle bolts 10 on the binding element 3 within the web 20. A shoe 2 which preferably has a roll-resistant and torsion-resistant sole 12 is thus connected to the ski 7 so that it can pivot about the axis 1. As can be seen from FIG. 7, a stop 18 adjustable by a screw 27 is provided in the binding element 3, by means of which the lifting angle of the shoe 2 is limited.

According to FIGS. 8 to 10, the web 20 of the sole 12 has the bore 13 coaxial with the axis 1, and the axle pin is formed by two semi-axes 11, which are displaceably mounted in the binding element 3 in the axis 1, and at inserted shoe 2 are partially inserted into the bore 13 from both sides. Instead of the bore 13, two blind bores could therefore also be formed his. According to FIGS. 9 and 10, at least partially longitudinal slides 28 designed as racks are guided on the binding element 3, into which toothed actuating wheels 29 engage at the front end. In the rear end section, each longitudinal slide 28 has an inclined driving web 30 which engages in an opposite recess in the semiaxis 11, which can be moved coaxially to the axis 1 in the guide 31 of the binding element 3. When the longitudinal slide 28 is actuated, the semiaxes 11 are therefore necessarily pushed into or out of the bore 13.

In the embodiment according to FIGS. 11 to 13, a shoe 2 is again used, the sole web 20 of which has a bore 13 into which two semi-axes 11 can be pivoted. For this purpose, in the binding element 3, a Hebel¬ ^mechanism is provided which is actuated by means of a toggle lever 38th This is pivotable about an axis 39 and has two rollers 37, each of which presses on a leg 35 of a pivot lever 33, which is connected to the leg 35 via a transverse arm 34.

Each pivot lever 33 is rotatable in bonded bearings 36 and the semi-axis 11 is arranged at its raised rear end, which swivels into the bore 13 from the side. FIG. 13 also indicates the possibility that the sole web 20 has at least one further bore 13 with a different slope, and is provided in the area between the imaginary axis of rotation 6 of the basic toe joints and the toe 17. In this case, swivel levers 33 of different lengths are preferably also provided, which are interchangeable, so that a larger number of positions and positions of the axis 1 can be reached. In the exemplary embodiments described so far, the axes 1 each run through the sole 12, FIGS. 14 and 15 show a schematic representation of an embodiment in which the axes 1 run through the ski 7. The binding element 3 which receives a shoe 2 in the embodiment not shown in detail has downwardly projecting tabs 40 or the like. on, which are arranged laterally on the ski 7. The ski is penetrated by protruding axle bolts 10 or two semi-axles arranged on the tabs 40 are also seen here, which can be inserted into the bore 13 of the ski. Different positions can also be achieved here, for example if several bores are formed in the ski 7.

Because of the axes 1, the conventional flexible design of the shoe sole 12 is no longer necessary, but it can be rigid at least from the swivel range to the heel 16, as a result of which the sole thickness can also be arbitrary. A rolling and torsion-resistant sole 12 also improves the grip in the

B_? Tion element, which is especially necessary in the skate step, so that heel guide parts can be dispensed with.

Claims

Patent claims:

1. A device comprising a binding element for fixing a cross-country ski boot on a cross-country ski, by means of which the foot can be pivoted during the running movement about an axis which is oblique to the longitudinal direction of the ski, characterized in that each axis (1) from the point of intersection on the inside (4th ) runs through a point on the outside (5) that is closer to the ski tip (8) than the intersection of the axes (1),

2. Device according to claim 1, characterized in that the axis (1) extends in the region below the imaginary axis of rotation (6) of the basic toe joints of the foot in the cross-country ski boot (2).

3. Device according to claim 1 or 2, characterized in that the axis (1) in projection on the

Ski surface runs at an angle between 70 ° and 86 ° to the longitudinal direction of the ski.

4. Device according to claim 3, characterized in that the axis (1) is arranged adjustable in the angular range between 70 ° and 86 ° to the ski longitudinal direction.

5. Device according to one of claims 1 to 4, characterized in that the axis (1) rises to the outside at an angle between 5 ° to 20 ° to the ski surface.

6. Device according to one of claims 1 to 5, characterized in that the axis (1) as a physical

Axle pin (10) is formed.

7. Device according to one of claims 1 to 6, da¬ characterized in that the axis (1) or the axle pin (10) through the sole (12) of the cross-country ski boot, in which at least one with

5 axis (1) aligned bore (13) is formed.

8. Device according to one of claims 1 to 6, da¬ characterized in that the axis (1) or the axle bolt (10) runs through the cross-country ski, in which at least one with the axis (1) aligned 0 hole (13) is trained.

9. Device according to claim 7 or 8, characterized gekenn¬ characterized in that the axle pin (10) on both sides protrudes from the bore (13), and engages in the binding element (3).

1510..Device according to claim 9, characterized in that the projecting ends of the axle bolt (10) are angular and can be locked by preferably spring-loaded locking bolts (14) of the binding element (3).

2011. Device according to claim .7 or 8, characterized gekenn¬ characterized in that the axle bolt (10) consists of two semi-axles (11) which are arranged in the binding element (3) and can be inserted into the bore (13).

12. The device according to claim 11, characterized in 25 that the semiaxes (11) are arranged in lateral guides (15) and can be inserted into the bore (13).

13. The device according to claim 11, characterized in that the semiaxes (11) on the binding element (3) is articulated and can be pivoted into the bore (13).

14. Device according to one of claims 1 to 13, da¬ characterized in that the sole (12) of the cross-country shoe (2) is designed to be roll-resistant.

15. Device according to one of claims 1 to 14, characterized in that the sole (12) of the cross-country shoe

(2) is torsionally rigid.

16. Device according to one of claims 2 to 13, characterized in that the sole (12) of the cross-country shoe (2) from the heel (16) to the axis (1) roll and / or torsionally stiff and from the axis (1) up to the front toe (17) is flexible.

17. Device according to one of claims 1 to 16, characterized in that the lifting angle of the shoe (2) is limited by a preferably adjustable stop (18).

18. Device according to claim 1, characterized in that the axis (1) in the region between the toe (17) and the imaginary axis of rotation (6) of the basic toe joints can be arranged in several positions.