EP1690571A1 - Ski for ski jumping - Google Patents

Abstract

Continuous ridges or runners extend between the nose (6) and the rear end of the ski (7) along the length of its running surface. These are fastened into or onto the sole (5). The ridges (9) project out of the plane of the sole. In one example, the ridges are formed by grooves in the sole, into which bridging sections are inserted. The ridges are metal, ceramic or glass, or are coated with these substances, and are optionally divided into segments. Other features noted, include varied ridge widths, replaceability and dovetailed fitting.

Description

The invention relates to a jumping ski for use in ski jumping and ski flying.

In the prior art Sprungski was tried with a variety of technical means to improve the handling both on the hill and on the landing slope and to optimize the aerodynamic behavior and to increase the flight stability to steadily increase the achievable jump sizes.
The jump skis currently used in ski jumping have, due to their conformity with the currently valid International Ski Federation regulations, a rectangular cross-section and an outsole provided with ski bottom in the mostly guide grooves are arranged.
Thus, for example, already DD 30 382 describes a jump skis in the plastic outsole, a plurality of guide grooves, preferably five, are milled with a rectangular cross-section to prevent lateral sliding away of the skis.
In contrast, the skis used in downhill skiing additionally, as described, inter alia, in DE 195 48 998, with protective edges edge trim to the guiding properties of the skis to improve on slopes and minimize slipping in the bends even on icy roads.

From AT 341 391 a downhill ski provided with steel edges at the edge is also known, in which below the binding area (over approximately one third of the ski length) a running surface convexly convexly curved extends. Over the surface of this convexly curved tread additional steel edges are arranged in sections which are parallel to each other and a lateral "slipping" of this cross-section convexly curved tread - even on icy slopes - should prevent.

Of course, such a descent of downhill skiing does not have to do with a jumping ski.
But both the downhill ski and the ski jump are equipped with polyethylene soles to achieve the highest possible speeds on the downhill or in the inrun track.
If one observes the wettability values of an untreated polyethylene outsole, one finds that the contact angles there are below 80 °. In order to improve the slipperiness of untreated PE outsoles, they are waxed.
In the prior art, different methods are used to increase the wax absorption and wax retention of PE outsoles.
For example, according to AT 353 143, grooves are made in the outsole to effect wax adhesion and to produce a uniform, even and perfectly adherent wax layer.

On the other hand, in the prior art, the ski soles are provided with a special finish and the wax applied at elevated temperature (about 130 ° C), so that the wax can penetrate into the uppermost layer of the polymer and improves the hydrophobic properties of the PE outsole

With conventional waxes, wettability values with a contact angle of 80 ° to 90 ° on PE surfaces and with special waxes (top-speed waxing / fluorine waxes whose price is approx. 150.00 € / can) can be measured with a contact angle of up to can be reached to 120 °.
Nowadays these top speed waxes are used in the jump run in order to increase the start-up speed and thereby realize larger jump / flight distances.
But especially in the junior sector, small clubs can hardly afford such fluorine waxes. In addition, these flour waxes pollute the environment via the melt water penetrating into the groundwater.
Since wet snow or meltwater accumulates under wet snow conditions in the area of the take-off track just in the gutter of the inrun track, however, even with these jump skis provided with special waxes, and whenever a closed water film can form under the ski, the suction effect of the skis Speeding speed, especially in the area of the take-off table significantly reduced and thus significantly reduces the jump distance achievable.
In order to increase the starting speed (also among other things), DD 270 011 B1 proposes changing the outsole of the skis, starting at the tip, continuously from a convex to a concave profile, in order to prevent the formation of a load-bearing air cushion underneath To reach concave outsole, so that with increasing speed in the run-up track a supporting air cushion is generated, which should reduce the sliding friction, so that by means of a higher start-up speed, a larger jump distance could be achieved.
Whether the "load-bearing air cushion" actually increases the start-up speed is set there, but since the design presented in this document is inevitably associated with high manufacturing costs and, moreover, the skiver cut in this solution differs significantly from a rectangular cross-section, and therefore with the currently valid regulations of the International Ski Association is not compliant, this solution has not yet been used in competitions.

The invention has for its object to develop with the currently valid rules of the International Ski Federation compliant Sprungski with rectangular cross-section which eliminates the aforementioned disadvantages of the prior art, the optimum sliding properties of the jump skis achieved even without the use of special waxes, at the same time the jump conditions among the very critical "wet snow conditions" (ie the sliding and guiding properties at a filled in the area of the takeoff table with wet snow or meltwater gutter of the inrun track) significantly increased and achievable in ski jumping jump / flight distance, also positively influenced the landing, at the same time Strength properties and also the wear resistance of the skis significantly improved and also inexpensive to produce.

According to the invention, this object is achieved by a skis with a rectangular Skiquerschnitt, a top flange (1), a lower flange (2) and a arranged between these Skikeil (3) and below the lower flange (2) arranged Ski sole (5), which is characterized in that sliding ribs (9) projecting beyond the plane of the ski sole (5) are arranged between the ski blade (6) and the ski end (7) over the entire length of the ski support surface, in the ski longitudinal direction in / on the ski sole (5).
These metallic and / or metal-coated, or ceramic or glass segments existing sliding webs (9) themselves compared to those with special waxes (fluorine waxes) treated PE surfaces significantly improved sliding properties and simultaneously act in the gutter of the inrun of a ski jump similar skating skids and improve at the same time under various snow conditions without any wax treatment of the ski sole, surprisingly, the sliding properties of the skip according to the invention.
In this case, by the inventive arrangement of the sliding webs (9) which extend beyond the plane of the ski sole (5) in the ski longitudinal direction between the ski shovel (6) and the ski end (7) and the bungee conditions, ie the sliding and guiding properties in the area of the take-off even under the very critical "wet snow conditions" significantly improved.
As a result of in the front "Auftagebereich" in / on the ski sole (5) arranged sliding webs (9) air bubbles are pressed by the wind under the ski shovel (6) at high speed even in a provided with melt ice gutter of the inrun air bubbles under the ski bucket (6), and while driving due the continuous, "side sealing" sliding webs (9) transported between them along the PE surfaces of the ski sole to the ski end (7).
As a result of this taking place during the entire startup phase of the invention air intake is surprisingly even under any, ie the different snow temperature conditions such improvement of the sliding properties of the invention Sprungski achieved that the invention Sprungski are completely without any wax treatment the fastest.
The inventive arrangement of these sliding webs (9) ensures that air is always introduced between the corresponding surfaces, so that even if in the area of the jump table in the gutter of the inrun wet snow or melt water accumulates under the jump skies no closed water film can train.
As a result, the "suction effect", which is especially feared in the area of the take-off table by the jumpers, is avoided at the same time.

By means of the solution according to the invention can thus surprisingly without any wax treatment of the PE outsole improved the sliding properties of the jump ski and the achievable jump / flight distance can be significantly increased.
Since the ski underside according to the invention is also "grippier", the landing is also influenced positively.
According to the invention arranged in the ski longitudinal direction on the ski sole sliding bars (9), for example, be glued, screwed or riveted. These embodiments are very cost-effective and are particularly suitable for young talent.

Characteristic in this context, however, that the arranged in the ski longitudinal direction sliding webs (9) are secured in grooves (8) which are arranged in the ski sole (5). These sliding webs (9) can be fixedly arranged in the grooves (8), for example glued.

However, it is also essential to the invention that the sliding webs (9) are interchangeable in the grooves (8).

Thus, it is possible for each athlete to optimize the sliding bars used individually and, if necessary, even adapted to the respective ski jumping conditions, for example different Gleitstegformen or sliding bars made of stainless steel against chrome sliding bars, or against nickel vapor coated sliding webs (9) made of plastic, or to replace, for example, against segmented sliding webs with ceramic or glass surfaces.

It is advantageous in this context if the grooves (8) have the shape of dovetail guides. As a result, a functionally reliable, heavy duty and at the same time replaceable at any time attachment of the sliding webs (9) is ensured.

Of course, these arranged in the ski sole (5) sliding webs (9) in particular in the Eisrille the inrun also increase the Wear resistance of the ski base and beyond the same all the strength properties of the skis essential.

Since the solution according to the invention can also be manufactured efficiently with the currently customary machines without significant additional high device complexity, it is also very easy and inexpensive to produce.
In addition, the cross section corresponds to a rectangular cross-section and is therefore also compliant with the currently valid regulations of the International Ski Federation.
It is also essential to the invention that the height of the sliding webs (9) with which they extend beyond the ski sole (5) varies over the ski longitudinal direction, ie that the height of the sliding webs (9) relative to the plane of the ski sole (5), for example, from the end of the ski blade (6 ) can, for example, continuously increase or decrease until the end of the ski (7). It is also characteristic that the height of the sliding webs (9) with which they extend beyond the ski sole (5) varies over the ski direction.

In this case, for example, at five juxtaposed sliding webs, the sliding webs (9) and the middle sliding web (9) project in height over the intermediate sliding webs, so that by means of this solution, on the one hand, the guiding properties of the ski are improved and, moreover, by the higher surface pressure on the one hand acting as runners "higher" sliding webs (9) on the other hand, as well as due to the thereby forming in the start-up phase between the sliding webs under the ski air distribution on the other hand, the sliding properties can be further increased.

Characterized in that according to the invention the middle and / or the edge arranged sliding webs (9) project beyond the intermediate sliding webs (9) in relation to the ski sole (5), ie always "edge seal" according to the invention, by means of this edge arranged increased sliding webs "lateral air leakage" below the ski sole prevents.

It is essential in this context, however, that the width of the side by side in the ski sole (5) arranged sliding webs (9) varies. As a result, in particular in connection with the abovementioned features of the invention, the respective ski can be tuned even better to the individual requirements of the respective jumper.

Further features, details and advantages of the invention will become apparent in conjunction with the accompanying drawings and the following embodiments with the accompanying explanations. However, the possible embodiments of the invention are not limited to the embodiments presented below.

Figur 1 :

die Unteransicht des erfindungsgemäßen Sprungskis mit zwei auf der Skilaufsohle 5 angeordneten Gleitstegen 9;

Figur 2 :

die Unteransicht des erfindungsgemäßen Sprungskis mit drei in der Skilaufsohle 5 angeordneten Gleitstegen 9;

Figur 3 :

die Seitenansicht des erfindungsgemäßen Sprungskis aus Figur 2 mit über die Skilänge kontinuierlich abnehmender Höhe der Gleitstege 9 mit der diese die Skilaufsohle 5 überragen;

Figur 4 :

den Schnitt durch einen erfindungsgemäßen Sprungski gemäß Figur 1 mit zwei auf der Skilaufsohle 5 aufgeklebten Gleitstegen 9;

Figur 5 :

den Schnitt durch einen erfindungsgemäßen Sprungski mit zwei in der Skilaufsohle 5 auswechselbar angeordneten Gleitstegen 9 mit einer Auswahl an weiteren Gleitstegen 9 welche in den selben Nuten 8 der Skilaufsohle angeordnet werden können;

Figur 6 :

den Schnitt durch einen erfindungsgemäßen Sprungski mit zwei in der Skilaufsohle 5 in schlitzförmigen Nuten 8 angeordneten Gleitstegen 9 einer weiteren erfindungsgemäß möglichen Gleistegform;

Show it :

FIG. 1:

the bottom view of the skis invention with two arranged on the ski sole 5 sliding webs 9;

FIG. 2:

the bottom view of the invention skis with three arranged in the ski sole 5 sliding webs 9;

FIG. 3:

the side view of the jumping skis according to the invention from Figure 2 with over the ski length continuously decreasing height of the sliding webs 9 with which they extend beyond the ski sole 5;

FIG. 4:

the section through a skip according to the invention according to Figure 1 with two glued on the ski sole 5 sliding webs 9;

FIG. 5:

the section through a skip according to the invention with two interchangeable in the ski sole 5 arranged sliding webs 9 with a selection of other sliding webs 9 which can be arranged in the same grooves 8 of the ski sole;

FIG. 6:

the section through a skip according to the invention with two arranged in the ski sole 5 in slot-shaped grooves 8 sliding webs 9 a further inventively possible Gleistegform;

1 shows the bottom view of the skis according to the invention with two between the ski blade 6) and the ski 7 arranged in the ski longitudinal direction on the ski sole 5, the plane of the ski sole 5 superior sliding bars 9 is shown.
FIG. 2 shows the bottom view of the skis according to the invention with three skids 9 arranged between the skiboot 6 and the ski end 7 in the ski longitudinal direction in the ski sole 5, the plane of the ski sole 5 projecting beyond.
FIG. 3 shows the side view of the jumping skis according to the invention from FIG. 2 with the height of the sliding ribs 9 continuously decreasing over the ski length from the ski shovel 6 to the ski end 7 with respect to the plane of the ski sole 5. In the present embodiment, the height of the sliding webs 9 varies over the ski sole 5 between 0.5 mm and 3 mm.
Due to the inventive variation of the height of the sliding webs 9 with which they extend beyond the plane of the ski sole 5 along the ski longitudinal direction of the jump ski between the ski blade 6 and the ski end 7, the jump conditions under very critical "wet snow conditions" are significantly improved, as a result of the in the front "support area "arranged in the ski sole 5 'higher' sliding bars 9 even in one with Melting-filled ice gutters of the inrun track air bubbles are pressed by the wind under the ski shovel 6, and optimally transported while driving between the sliding bars 9 along the PE surfaces of the ski sole 5 to the ski end 7 back.
FIG. 4 now shows the section through a skip according to the invention according to FIG. 1 with a top chord 1, a bottom chord 2 and a ski boot 3 arranged between them, a ski sole 5 arranged below the bottom chord 2 and two glued on the ski sole 5 according to the invention Sliding webs 9 made of metal-coated plastic, which extend beyond the ski sole 5 by about 2 mm.
This embodiment is very cost-effective and is particularly suitable for young talent.
FIG. 5 shows a section through a skip according to the invention with a top flange 1, a bottom flange 2 and the side cheeks 4 and a ski boot 3 arranged between them, a ski sole 5 arranged below the bottom belt 2 and two sliding webs 9 interchangeable in the ski sole 5 according to the invention , which protrude the ski sole 5 by about 1 mm, with a selection of different sliding webs 9 which can be arranged in the dovetail grooves 8 of the same ski sole 5 to better match the respective ski to the individual needs of each jumper represented. Through these dovetail grooves 8 is a functionally reliable, heavy duty and at the same time at any time "interchangeable" attachment of the sliding webs 9 guaranteed.
FIG. 6 shows the section through a skip according to the invention with a top chord 1, a bottom chord 2 and the side cheeks 4 and a ski boot 3 arranged between them, a ski sole 5 arranged below the bottom chord 2 and two slits 8 arranged in the ski sole 5 according to the invention Sliding webs (9) in a further possible construction according to the invention.

In this design is a geometrically specially profiled ski outsole in the slot-shaped grooves 8 for receiving, bent sliding bars are arranged from sheet metal, which extend beyond the plane of the ski sole 5 by about 3 mm.
Also shown in this figure 6, a further possible design of the sliding webs 9 is also shown, which can be arranged in a correspondingly compatible designed outsole analogous in slot-shaped grooves.
This design is very cost-effective and particularly suitable for the young.
It is also advantageous in this design that the metal sheets also replaced if necessary, and thereby the sliding properties can be varied.

By means of the solution according to the invention, it has thus been possible to develop a skip with a rectangular cross-section conforming to the currently valid regulations of the International Ski Federation which achieves the optimum skid characteristics of the skis even without the use of special waxes, at the same time the skipping conditions under the very critical "wet snow conditions" (US Pat. ie the sliding and guiding properties at a filled in the area of the jump table with wet snow or melt ice gutter of the inrun lane) significantly increased and achievable in ski jumping jump / flying distance, also positively influenced the landing, at the same time the strength properties and wear resistance of the Jump skis significantly improved and also inexpensive to produce.

REFERENCE SYMBOL

1

upper chord

2

lower chord

3

Skikeil

4

Sidewall

5

skiing sole

6

ski shovel

7

tail

8th

groove

9

sliding bridge

Claims (12)

Jump ski with a rectangular Skiquerschnitt, a top flange (1), a lower flange (2) and arranged between these Skikeil (3) and below the lower flange (2) arranged Ski sole (5), characterized in that between the ski blade (6) and the ski end (7) over the entire length of the ski pad surface continuous, in the ski longitudinal direction in / on the ski sole (5) attached, the plane of the ski sole (5) superior sliding bars (9) are arranged. Jump skis (1) according to claim 1, characterized in that in the ski longitudinal direction in the ski sole (5) grooves (8) are introduced in which sliding webs (9) are arranged. Jump ski (1) according to claim 1, characterized in that the sliding webs (9) consist of metal. Jump ski (1) according to claim 1, characterized in that the sliding webs (9) are metal coated. Jump ski (1) according to claim 1, characterized in that the sliding webs (9) are divided into segments and, for example, can also consist of ceramic or glass, or are coated with ceramic or glass. Jump ski (1) according to claim 1, characterized in that over the ski longitudinal direction, the height of the sliding webs (9) with which this the ski sole (5) protrude over. Jump ski (1) according to claim 1, characterized in that over the Skiquerrichtung the height of the sliding webs (9) with which this the ski sole (5) protrude over. Jump ski (1) according to claim 1, characterized in that the width of the side by side in the ski sole (5) arranged sliding webs (9) varies. Jump ski (1) according to claim 3, characterized in that the sliding webs (9) in the grooves (8) are glued. Jump ski (1) according to claim 3, characterized in that the sliding webs (9) in the grooves (8) are arranged exchangeably. A jumping ski (1) according to claim 3, characterized in that the grooves (8) are in the form of dovetail guides. Jump skis (1) according to claim 7, characterized in that the middle and / or edge arranged sliding webs (9) project beyond the intermediate sliding webs (9) in their height relative to the ski sole (5).

Images