EP0220330A1 - Ski binding - Google Patents

Abstract

A ski binding comprises locking pins (1) fixed on the ski (2) and intended for being introduced into the corresponding openings (3) in the nose part of the sole (4) of the shoe (5), and a fixator (6 ) for limitation of the vertical displacement of the shoe (5). At least one part of the surface of the opening (3) contacting with the surface of the pin (1) is bent along a bow essentially corresponding to the trajectory of the displacement of the part of the sole (4) of the shoe (5 ), adjoining the pin (1) at the moment of the push often the skier.

Description

The invention relates to the sports inventory, more precisely to a ski binding for the running skis.

The invention can be used advantageously both for the sport running skis and for the skis in the tourist version.

At present, the demands on the sports inventory have grown and changed considerably. Since the skiers are increasingly using the skate step, the resistance of the ski shoe sole to twisting must be increased because the skier runs on the edge of the ski for a long time. In this case, the ski guide surface (and thus the shoe sole plane) forms a considerable angle with the ski track surface, which leads to the creation of strong torsional moments with respect to the shoe sole when the skier pushes off.

Underlying state of the art

At present the ski bindings of the company "Adidas" are widely used, which represent a plate with side parts, which are oriented at an angle to the longitudinal axis of the ski. The plate size and the amount of the angle of inclination of the side parts to the longitudinal axis of the ski are determined by the size and shape of the tip of the sole of the shoe. The binding is intended for use with a ski boot that has a protrusion on the upper surface of the sole part of the shoe sole.

The lock on this ski binding is structured as follows. An axis is attached to the plate, on which a lever is attached, which has another axis at its free end. For its part, a second lever is arranged on this axis, the free end of which is intended for pressing on the projection of the tip of the sole of the shoe.

To fix the boot, the skier supports the end of the second lever against the ledge as far as the stop and then presses on the first lever, which in this case is pivoted until the line connecting the two axes comes to lie below a line. which the former axis and the An focus connects. When this position is reached, the shoe is fixed. The disadvantages of this ski binding include considerable binding weight, relatively low manufacturing suitability, which is mainly due to the very complicated manufacture of the locking structure, and the creation of high torques in the horizontal plane. The latter disadvantage is particularly significant when the skier applies skate. A strong sole twist can be explained not only by the binding construction, but also by the narrow tip area of the sole of the "Racing Norm 38" shoe model, the tip of which is narrower than that of the "Racing Norm 50" model.

The "Ratafella" type ski binding is currently widely used. The binding also represents a plate with side parts that are at an angle to the longitudinal axis of the ski. In contrast to the ski binding from "Adidas", three pins are attached directly to the plate, which are intended for insertion into the holes in the tip of the shoe sole. The fixation of the shoe is achieved with the help of a bracket, the free ends of which are received in bushings fastened in the side parts. In the front part of the ski binding there is a plate with grooves on an axis. The shoe is adjusted in such a way that the holes in the shoe sole tip parts would match the retaining pins. The skier also presses on the bracket so that he would get into one of the plate grooves. The modifications of this ski binding differ by different types of fasteners: The advantages of the binding include reliable shoe fixation, a lower torque compared to the ski binding from "Adidas" discussed above, which occurs in the plane perpendicular to the longitudinal axis of the ski. The disadvantages include considerable binding weight, poor suitability for manufacturing bindings and locking ler, as well as, among other things, the need to use the hands (the ski pole) to fix and release the boot.

As a result of the increased width of the sole of the shoe sole, there is an increase in the resistance of the shoe sole to bending in the vertical plane oriented along the longitudinal axis of the shoe. This latter disadvantage occurs sufficiently strongly when the skier uses conventional walking step. Using the example of the two ski bindings discussed above, it can be concluded that there is a contradiction: The better a ski binding works in a conventional running step, the worse it works in an ice skating step. It is obvious that with a conventional running step the ski binding on the "Racing Norm 38" model works better than with a skating step compared to the binding on the "Racing Norm 50" model. The opposite is true for skating.

A ski binding is known which represents holding pins, each of which consists of two parts (see DE Auslegeschrit No. 3240750). One of these parts is intended for direct insertion into the ski body (shoe body). If the lower pin part is arranged in the ski body, the shoe must be adjusted in order to fix it in such a way that the upper parts of the holding pins would enter the bores present in the tip of the sole of the shoe. Various types of locking devices are used to limit the movement of the shoe in the vertical plane. The advantages of this binding include high manufacturing suitability and simple construction, use of retaining pins in combination with various, easy to manufacture locks. The disadvantages include relatively low operating properties of the binding when fixing and releasing the shoe because the use of the hands by the athlete is inevitable.

Known is a ski binding according to DE- _GM No. 8425984, which contains holding pins which are attached to the ski and are intended for insertion into associated holes in the tip of the sole of the shoe, as well as a locking device which is designed in the form of a leaf spring which is intended to enclose the tip of the sole of the shoe has the shape of a bow at the top, with one end connected to the ski. The advantages of this binding construction include relatively high manufacturing suitability, low weight, convenient operation. The latter is achieved in that the binding construction according to the invention allows the sole of the shoe to be fixed in automatic operation (without the hands or the ski pole being used by the skier).

The disadvantages of the design are that it can only be used with shoes that have an edge or a protruding point. This ski binding construction is characterized by the creation of high tensions in the sole in the area of the holding pins, since all forces are practically absorbed by the holding pins, which can lead to the destruction of the pins and the sole.

Disclosure of the invention

The object of the present invention is to provide a ski binding, the construction of which would allow the bending moment to be reduced which acts on the binding elements when the skier pushes off.

The object is achieved in that in the ski binding, the holding pins, which are attached to the ski and are intended for insertion into associated bores in the tip of the sole of the shoe, and a retainer which limits the shoe displacement in the vertical direction, according to the invention at least one with the pin surface contacting surface section of the bore is bent in an arc shape, the curve being substantially coincident with the movement path of the shoe sole section adjoining the retaining pin when the skier is pushed off.

The ski binding construction according to the invention permits it to considerably reduce the torque acting on the holding pins and the shoe sole in the zone of the counterbores provided for receiving the holding pins. This in turn makes it possible to increase the reliability of the ski binding and to extend its useful life. In addition, this binding makes it possible to increase the effectiveness of pushing off the running athlete because a much lower force is used to bend the sole of the shoe.

In one of the embodiments of the invention, at least one surface section of the pin contacting the surface of the bore is bent in an arc shape, the bending curve essentially coinciding with the movement path of the shoe sole section adjoining the holding pin when the skier is pushed off.

In a further embodiment of the invention, the bore intended for receiving the retaining pin has an extension directed towards the rear part of the shoe, the arcuate surface section of the bore representing a bore surface portion in the extension zone which contacts the retaining pin.

This embodiment is somewhat more convenient to manufacture and more convenient to operate because it allows the use of standard straight pins.

According to one of the embodiments of the invention, a damper made of elastic material is arranged in the bore in the extension zone.

The presence of a damper allows the force acting on the holding pin when the skier is pushed off to be distributed more evenly.

• Fig.1 eine Ausführungsform der Skibindung gemäss der Erfindung (im Längsschnitt);
• Fig.2 eine Ausführungsform der Skibindung (im Längsschnitt);
• Fig.3 eine Ausführungsform der Skibindung (im Längsschnitt);
• Fig.4 einen Schnitt nach einer Linie IV-IV von Fig.3.

Further objects and advantages of the present invention can be understood from the detailed description of its exemplary embodiments given below and from the attached drawings, in which it shows:

• 1 shows an embodiment of the ski binding according to the invention (in longitudinal section);
• 2 shows an embodiment of the ski binding (in longitudinal section);
• 3 shows an embodiment of the ski binding (in longitudinal section);
• 4 shows a section along a line IV-IV of Figure 3.

The ski binding according to the invention contains holding pins 1 (FIG. 1), which are fastened on a ski 2 and are intended for insertion into bores 3 of the sole 4 of a shoe 5, and a lock 6. The surface sections of each holding pin 1 and the hole 3 that make contact with one another are curved in an arc shape, the arc of curvature essentially coinciding with the movement path of the section of the sole 4 of the shoe 5 adjoining the holding pin 1 when the skier is pushed off. Each arcuate bore 3 is continuous and connects the lower surface of the sole 4 with its front face.

The lock 6 of the ski binding is designed in the form of a bow-shaped leaf spring, one end of which is rigidly connected to the ski 2, but the other end of which is provided with a removable fork 7 which is intended for insertion into the holes 3 in the sole 4 of the boot 5 .

The ski binding works as follows.

The lock 6 is pressed away in the direction of the tip of the ski 2 and the holding pins 1 on the ski 2 are brought into line with the associated holes 3 in the sole 4 of the shoe 5. After inserting the retaining pins 1 into the holes 3, the lock 6 is released.

Then the removable fork 7 is introduced with its two ends, the dimensions of which correspond to the masses of the holes 3, into the holes 3. Then you put the free end of the fork 7 on the lock 6, for example, in such a way that the free end of the fork 7 would encompass the free end of the lock 6. The fork 7 is designed to be easier to fix the shoe 5 to the holding pins 1. A non-releasable connection of the lock 6 and the fork 7 could make it difficult to place the holes 3 in the shoe 5 on the arch-shaped retaining pins 1.

When the skier is running, the shoe 5 pressed by the arrester 6 onto the holding pins 1 shifts in the vertical plane with respect to the pins 1.

During this displacement, the arcuate surface of each bore 3 slides relative to the arcuate retaining pins 1 and to the lock 6.

2 shows an embodiment of the ski binding in which standardized straight pins 1 are used. In each hole 3 an extension directed towards the rear of the shoe 5 is carried out.

A surface section 8 of the bore 3, which contacts the pin 1 and is located in the expansion zone, is curved in an arcuate manner, the arc of curvature essentially coinciding with the movement path of the section of the sole 4 of the shoe 5 which is in contact with the retaining pin 1 when the skier is pushed off. In this embodiment, a bow-shaped leaf spring is also used as the arrester, one end of which is rigidly connected to the holding pins 1, but the other end of which is inserted into a groove 9 which is incorporated in the forehead of the tip part of the sole 4 of the shoe 5.

In a further embodiment of the invention, which is shown in Figs. 3-4, a damper 10 made of an elastic material, e.g. made of rubber, introduced. A plate 11 is attached between the damper 10 and the holding pin 1, by means of which the contacting of the holding pin 1 with the damper 10 is established.

The dampers 10 and the plates 11 are held in the bores 3 with the aid of a plate 12 which is fastened to the sole 4 by means of fastening elements 13.

The front part of the sole 4 (Fig.3) between the lock 6 and the holding pins 1 can be made of an elastic material, e.g. made of rubber. In this case, this part of the sole 4 is deformed when the shoe 5 is lifted.

Commercial usability

The invention can be most advantageously used for sports skis using both the classic and the skate step by the skier.

Claims (4)

1. Ski binding, the holding pins, which are attached to the ski and intended for insertion into associated holes in the tip part of the shoe sole, and a lock that limits the shoe displacement in the vertical direction, characterized in that at least a portion of the surface of a Bore (3), which contacts the surface of a holding pin (1), is bent in an arc shape, the bending arc with the movement path of the section of the sole (4) of the shoe (5) adjoining the holding pin (1) when the skier is pushed off in essentially coincides. 2. Ski binding according to claim 1, characterized in that at least one surface section of the retaining pin (1), which contacts the surface of the bore (3), is bent in an arc shape, the bending arc with the movement path of the section adjoining the retaining pin (1) the sole (4) of the shoe (5) essentially coincides when the skier is pushed off. 3. Ski binding according to claim 1, characterized in that the bore (3) for receiving the retaining pin (1) has an extension directed towards the rear of the boot (5), the arcuate surface section of the bore (3) having a surface section (8) represents the hole (3) in the extension zone, which contacts with the retaining pin (1). 4. Ski binding according to claim 3, characterized in that a damper (10) made of an elastic material is arranged in the bore (3) in the extension zone.

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