EP3250298B1 - Ski with climbing assistance - Google Patents

Description

The invention relates to a cross-country ski with a tread layer, wherein the tread layer in a central region provided for riser zone has at least two groove-shaped recesses, each with a fastenable rear anti-hindering element.

Skis with a plurality of grooves for receiving or attaching as climbing aid Rückgleithemmenden elements are already known in the art. If the climbing aids are releasably secured in the recess, this has the advantage that the user can optimize the type of Rückgleithemmenden elements as desired for his individual application. For example, if the user prefers to travel on groomed trails, he will e.g. Use a coated wax tape or sawtooth profile tape to optimize its progression. If the user prefers to move in open terrain, the user may prefer to place a hide or the like in the groove.

A ski of the type mentioned is from the FR 2 234 909 A in which also two groove-shaped recesses are provided, in which fur inserts can be used. Again, the Rückgleithemmende effect abruptly, so that the risk of plucking the ski during the sliding phase is significant.

From the FR 2 301 274 A1 a ski is known in which behind one another and - with respect to a central axis of the ski - laterally offset from each other arranged recesses are provided in a ski body, in which a respective Steigfellstreifen is firmly taken. By this over the entire length of the ski distributed arrangement of the consecutive Steigfellstreifen a uniformly distributed Rückgleithemmende effect should be achieved. Since, however, only a single pair of ascending streaks (viewed transversely to the longitudinal direction of the ski) is active, it must have a comparatively strong anti-backlash effect, which results in the risk of unsteady or non-harmonious transition between sliding and climbing phases.

From the DE 211 07 37 A Furthermore, for example, a ski is known, in which the side of a centrally arranged track two strip-shaped recesses in the tread layer are present, in which strip-shaped Rückgleithemmende elements can be used. The disadvantage here is in particular that unfold at a load change of a Gleitin a climbing phase, the two climbing aids used in the recesses their re-hindering effect. Insofar as during the sliding phase by an unwanted body weight shift or lane unevenness therefore rewinding the elements unfold their effect, the sliding phase is at least briefly abruptly interrupted or disturbed; ie there is a so-called plucking of the ski during the sliding phase, which is extremely unpleasant for the user. In addition, in the embodiment of the DE 211 07 37 A with extending through the tread layer through recesses also disadvantageous that the tread layer - seen across the width of the ski - is interrupted and therefore can penetrate water between the lateral boundaries of the recess and the back-inhibiting elements used by the capillary action. This often leads to icing of these areas, whereby a functionality is not guaranteed in practical use.

From the US 2012/061929 A1 For example, a snowboard is known which has recesses 1 in which inserts can be inserted to reduce or limit the speed during downhill riding.

Object of the present invention is therefore to provide a ski, with which a harmonious transition between sliding and climbing phase is made possible and with which an abrupt onset of Rückgleithemmenden effect during the sliding phase is avoided as possible.

According to the invention this is achieved in a ski of the type mentioned in that two substantially mutually adjacent groove-shaped depressions are provided, wherein a front end and / or rear end of a groove-shaped recess respectively from the front end and / or rear end of the other recess Is arranged spaced apart in the longitudinal direction of the ski.

Due to the staggered arrangement of the front end and / or rear end of the two groove-shaped recesses of two, preferably parallel, substantially side by side extending references parallel, substantially mutually parallel recesses, the effect of optionally used in the groove-shaped depressions Rückgleithemmenden elements does not occur at the same time. Two groove-shaped recesses thus have a front and / or rear end portion, in which - seen transverse to the longitudinal direction of the ski - the other recess (seen in the longitudinal direction of the ski) is not or no longer exists. At the same time by the sectional juxtaposition of the wells but also a (middle) section is provided, in which both wells (seen in the transverse direction of the ski) run side by side and thus pressure applied in this area, the two optionally in this recorded back-inhibiting elements both active at the same time are. Accordingly, initially only the Rückgleithemmende effect of the element occurs, which is arranged in the groove-shaped recess whose front end is closer to the tip of the ski or whose rear end is located closer to the ski end. The Rückgleithemmende effect of the other element occurs in the region in which the beginning of the depression is closer to the ski center, during the movement added at a later date, so that a harmonious transition between sliding and climbing phase is achieved. The risk of an unwanted, abrupt onset of climbing aid by a body weight shift or due to uneven track during the sliding phase, ie a so-called plucking of the ski, is thus significantly reduced.

The groove-shaped depressions provided in the tread layer are in this case in the middle region, i. preferably arranged in the middle third of the ski, which extends over about 30 to 60% of the total ski length. Preferably, the groove-shaped recesses extend substantially over the entire central region.

In order to achieve a particularly harmonious transition between sliding and climbing phase, it is advantageous if both the front and the rear ends of the groove-shaped depressions are arranged offset from each other in the longitudinal direction of the ski. This is achieved in a simple manner in that the at least two groove-shaped recesses have substantially the same length.

In order to avoid water accumulation between an inserted back-inhibiting element and the tread layer, which can disadvantageously lead to ice formation, it is favorable if the depressions each have a groove bottom in the tread layer, wherein the groove bottom is formed by the continuous tread layer. This ensures that the tread layer also extends over the entire ski width in the region in which the groove-shaped depressions are provided, so that accumulations of water and an associated risk of icing with respect to through recesses can be significantly reduced.

In order to easily enable the formation of groove-shaped depressions in the tread layer which do not extend through the entire tread layer, it is advantageous if the tread layer in the middle region, in particular in the rise zone, has a greater thickness than in a front and / or. or rear sliding portion. As a result, the groove-shaped recesses for receiving the Rückgleithemmenden elements in a simple manner, e.g. be made by milling. Of course, other variants for forming the depressions, e.g. the provision of groove-shaped depressions in a core, in which the tread material penetrates during compression of the ski - as known per se - possible.

With regard to a structurally expedient embodiment, in which the tread layer has a sufficient thickness for forming the groove-shaped recesses for receiving the Rückgleithemmenden elements, it is advantageous if the tread layer in the central region 1 mm to 5 mm, preferably 2 mm to 4 mm, in particular substantially 3 mm, thick.

If the front and rear sliding portion has a substantially constant first thickness and the central area of the tread layer has a substantially constant second thickness, a material-saving configuration results in the front and rear sliding portions, ie outside those areas in which the groove-shaped recesses are provided, and at the same time is in that area of the ski, ie in the middle area, in which the groove-shaped recesses are to be provided in the tread layer, sufficient material is present to incorporate the groove-shaped recesses which do not penetrate to a lower belt of the ski.

With respect to a homogeneous transition between the sliding portions, in which the tread layer has a smaller thickness and the central area in which the tread layer has a greater thickness, it is advantageous if the tread layer between the front and rear sliding portion and the central region each have a wedge-shaped transition region having.

In order not to adversely affect the strength of the ski at the same time, it is advantageous if a lower belt adjacent to the tread layer is adapted to the different thicknesses of the tread layer. Advantageously, not only the course of the lower belt, but also the lower surface of the core material, which adjoins the lower belt is adapted to the over the longitudinal extent of the ski changing material thickness of the tread layer, so that a compact, high strength having Ski is achieved.

With regard to a cost-effective and efficient production of the ski, it is advantageous if the tread layer has several parts, in particular a tread front part, a tread rear part and a tread center part with the at least two groove-shaped recesses. It is particularly advantageous if the tread front part and the tread rear part are substantially conventional tread layers with constant thickness, however, the tread center part advantageously has on the one hand the wedge-shaped transition regions to the tread front part and tread rear part and a central portion with the groove-shaped recesses.

In order to enable a particularly harmonious transition between the sliding and the rising phase, it is advantageous if a groove-shaped depression has a greater depth in a front region seen in the longitudinal direction of the ski, in particular in the first third of the longitudinal extension than in the remaining region, wherein the region of greater depth is preferably formed wedge-shaped tapering rearward. This ensures that - with appropriate coordination with the inserted anti-backlash element - in the foremost region of the depression, the effective effective surface of the inserted anti-backlash element initially does not protrude over a tread plane defined by the tread layer. Only after the foremost area, the active surface of the anti-backlash element begins to protrude increasingly in the direction of the ski over the tread plane.

Furthermore, it is favorable if at least one groove-shaped depression has a smaller depth than in the remaining region in a rear region seen in the longitudinal direction of the ski, in particular in the last third of the longitudinal extent, wherein the region of lesser depth is preferably designed wedge-shaped tapering towards the rear. This results due to the reduced depression in the rear section that the active surface of a recorded in the recess Rückgleithemmenden element in the rear area a higher effect, preferably in the manner of a repelling edge, unfolds.

Tests have shown that it is favorable for avoiding the unwanted insertion of the anti-backlash effect of elements inserted in the groove-shaped recesses when the front and / or rear end of the groove-shaped recesses are arranged at a distance of 20 to 150 mm from each other.

With regard to a uniform course of the anti-backlash effect, it is advantageous if all groove-shaped recesses have substantially the same length and the same width.

In the prior art a variety of anti-rebar elements are known as climbing aids, which have different advantages depending on the application. Accordingly, depending on the application, a fur strip, a film strip with a back-inhibiting profile or a climbing wax, a rubber-filled plastic film or the like can be provided according to the invention as a back-restraining element.

In order to be able to provide a ski according to the invention with different anti-backlash elements in the groove-shaped depressions, it is favorable if the anti-backlash element is detachably connected to the running surface, in particular by means of a pressure-sensitive adhesive, a hook-and-loop fastener connection or the like.

• Fig. 1 eine Draufsicht von unten auf einen Ski mit versetzt angeordneten nutförmigen Vertiefungen;
• Fig. 2 eine Draufsicht von unten auf einen Ski mit einer alternativen Anordnung von versetzt angeordneten nutförmigen Vertiefungen;
• Fig. 3 eine weitere Draufsicht von unten auf einen Ski mit einer weiteren alternativen Ausgestaltung von versetzt angeordneten nutförmigen Vertiefungen;
• Fig. 4 eine weitere Ansicht von unten auf einen Ski eines alternativen Ausführungsbeispiels mit versetzt angeordneten Nuten;
• Fig. 5 eine auseinandergezogene Darstellung im Längsschnitt eines erfindungsgemäßen Ski;
• Fig. 6a teilweise einen Längsschnitt durch einen erfindungsgemäßen Ski mit einer nutförmigen Vertiefung;
• Fig. 6b teilweise einen Längsschnitt gemäß Fig. 6a mit einem eingesetzten Steigfell als rückgleithemmendes Element;
• Fig. 7a teilweise einen Längsschnitt eines alternativen Ausführungsbeispiels; und
• Fig. 7b teilweise Längsschnitt gemäß Fig 7a mit einem eingesetzten Steigfell.

The invention will be explained in more detail below with reference to preferred embodiments, to which, however, it should not be limited. In detail, in the drawings:

• Fig. 1 a plan view from below of a ski with staggered groove-shaped recesses;
• Fig. 2 a bottom plan view of a ski with an alternative arrangement of staggered groove-shaped recesses;
• Fig. 3 a further plan view from below of a ski with a further alternative embodiment of staggered groove-shaped depressions;
• Fig. 4 a further bottom view of a ski of an alternative embodiment with staggered grooves;
• Fig. 5 an exploded view in longitudinal section of a ski according to the invention;
• Fig. 6a partly a longitudinal section through a ski according to the invention with a groove-shaped recess;
• Fig. 6b partially according to a longitudinal section Fig. 6a with an inserted climbing skin as Rückgleithemmendes element;
• Fig. 7a partially a longitudinal section of an alternative embodiment; and
• Fig. 7b partly longitudinal section according to Fig. 7a with a used climbing skin.

In FIG. 1 1, a ski 1 is shown from below, ie a view of the running surface 2 can be seen, which is formed by the underside of a tread layer 3.

The ski 1 has a ski tip or a front end 4 and a ski end 4 a, which is arranged in the running direction at the rear end of the ski 1. In a sliding phase of the curved in side view in a known manner Ski 1 is brought into contact with the snow in two sliding portions of the tread 2, wherein the sliding portions of a front sliding portion 5 in the front third of the ski and a rear sliding portion 6 in the rear third make up the ski.

Between these two sliding portions 5, 6, a central region 7 is provided, in which a riser zone is provided. In this central region 7, the tread 2 comes in particular at full (weight) load, i. especially during repelling, in contact with the ground. The middle region 7 preferably extends over approximately 30 to 60% of the ski 1 and in any case encloses the middle of the ski 1 relative to the longitudinal extent of the ski.

As in Fig. 1 a total of three groove-shaped recesses 8 are provided in this central region 7, which extend in the longitudinal direction of the ski 1 with a substantially constant width. However, the three groove-shaped recesses 8 do not set - as usual in the prior art - at the same place, but a front end 9 of a groove-shaped recess 8 is offset from the front end 9 of a further groove-shaped recess 8 is arranged. The distance between the front ends 9 of the groove-shaped recesses 8 is preferably between 20 and 150 mm.

As can further be seen, all recesses 8 have the same length, so that rear ends 10 of the groove-shaped depressions 8 are also arranged offset from each other. With the help of this staggered arrangement of the beginning or end of the groove-shaped recesses 8 a harmonious transition between sliding and climbing phase is achieved and the risk of abrupt onset of the optionally received in the groove-shaped recesses 8 elements or climbing aids 11 (see. Fig. 5 ) by an unwanted body weight shift or by uneven track during the sliding phase, which leads to so-called plucking of the ski, is reduced.

In Fig. 2 a further embodiment with three groove-shaped recesses 8 is shown, in which case the front end 9 of two lateral recesses 8 are arranged substantially at the same height. However, the front and rear ends 9, 10 of a third, in the middle arranged groove-shaped recess 8 is arranged offset from the other two wells.

A similar embodiment is in Fig. 4 shown here, wherein the central recess 8 is seen offset in the direction opposite to the two side depressions 8 to the rear. That is, the front end 9 of the central recess 8 is arranged further back, so that - with the same length of the recesses 8 - the rear end 10 of the central groove 8 ends closer to the ski end 4a, as the rear ends 10 of the lateral recesses eighth

Fig. 3 shows a further embodiment with only two, in the longitudinal direction of the ski staggered groove-shaped recesses 8. Again, the recesses 8 substantially the same length, so that both the front and the rear end 9, 10 of the two grooves offset from one another is.

In all embodiments according to the Figures 2 . 3 and 4 are thus at least two groove-shaped recesses 8 - as in the embodiment according to Fig. 1 - Offset in the ski longitudinal direction to each other, so that the above in connection with Fig. 1 effects of the invention described are also realized.

In the exploded sectional view according to Fig. 5 is particularly apparent that the groove-shaped recess 8 extends not only through the entire tread layer 3 in the central region 7, but that the groove bottom 12 is formed by the tread layer 3 itself. This results Also in the region of the groove-shaped recesses 8 advantageously a continuous tread layer 3, in which optionally Rückgleithemmende elements 11 can be used.

In the embodiment shown, the tread layer 3 is designed in three parts with regard to an efficient and cost-saving production and consists of a tread front part 3a, a tread rear part 3b and a tread center part 3c together. The tread front part 3a and the tread rear part 3b in this case have a constant material thickness, wherein the material thickness preferably, as is customary for tread documents, is approximately 1 to 1.2 mm. The groove-shaped recesses 8, however, have a depth of preferably about 0.5 to 0.8 mm.

To provide such groove-shaped recesses 8 in the tread layer 3 itself, i. Also, as the groove bottom 12 to leave the tread layer 3 and thus to avoid interruption of the tread layer 3, the tread center part 3c is formed reinforced and has a constant thickness of up to 5 mm in the central portion. In the front and rear end portions of the tread center part 3 c wedge-shaped portions 13 are provided, in which material thickness is constantly reduced / increased, so that the thickness of the tread layer of the maximum thickness in the central portion of the tread center part 3 c at the ends of the tread center part 3 c to the thickness or Height of the tread layer 3a, 3b is adjusted in the front and rear sliding portion.

As in Fig. 5 Furthermore, it can be seen that the ski 1 shown has a known structure, ie to the tread layer 3 includes a lower belt 14, in turn, the ski core 15 which is continued in the front Enbereich of a tip insert 16 and in the rear end of an end insert 17 , Above the core 15, an upper belt 18 is again provided in a conventional manner.

As in Fig. 5 it can be seen that the arrangement or the course of the lower belt 14 is adapted to the varying material thickness of the tread layer 3 over the ski longitudinal direction. Likewise is the underside 15a of the ski core 15 is adapted to the changing material thickness of the tread layer 3, so that a compact layered structure of the ski 1 with changing material thickness of the tread layer 3 results.

In Fig. 6a and 6b is partially a section through the tread layer 3 in particular the tread center part 3c shown, wherein it can be seen that the groove-shaped recess 8 in the front region, in particular in the foremost third may have a larger recess, which then drops constantly to the rear, so that the groove-shaped recess. 8 tapered wedge-shaped towards the rear.

This ensures that the in Fig. 6b shown in the inserted state, used as Rückgleithemmendes element 11 climbing aid in the front portion not or only slightly above the tread plane defined by the underside of the tread layer 3 protrudes. Towards the rear, ie seen in the direction of the ski end 4 a, then an active surface of the climbing aid initially projects slightly and then continuously to a greater extent beyond the tread plane. This leads, in particular in combination with the staggered arrangement of the depressions 8, to a particular harmonic transition between sliding and climbing phase, and thus an abrupt onset of the climbing aid can be avoided even better.

In the Fig. 7a and 7b is further seen that the groove-shaped recess 8 is tapered in the rear region, in particular in the last third, to the rear end 10 of the groove-shaped recess 8, ie falls back towards the ski end 4a, so that the Rückgleithemmende element 11 and the climbing aid in rear end of the groove-shaped recess 8 protrudes increasingly over the tread plane and thus unfolds in this area an improved anti-backlash effect.

As Rückgleithemmendes element 11 may be provided any known per se elements - in particular - as shown - strips of fur or a film strip with a Rückgleithemmenden profile or a climbing wax as well as a rubber-filled plastic film or the like. Preferably, the Rückbeleithemmende Element 11 detachably connected to the tread 3, wherein the Rückgleithemmende element 11, in particular a carrier or compound layer 11a and an effective surface having effective layer 11b provides. The connecting layer 11a may in this case on the groove base 12 facing surface connecting elements, for example in the form of a hook and loop, or a pressure-sensitive adhesive layer or the like in order to keep the rückbeleithemmende element 11 during use of the ski 1 on the one hand reliable in the recess 8 and on the other hand, however to allow easy replacement, to allow advantageously an individual adaptation to different applications.

Claims (15)

1. Cross-country ski (1) comprising a running surface layer (3), the running surface layer (3) comprising, in a kick zone provided in the central region (7), at least two groove-shaped depressions (8) each having a fastenable element (11) that prevents backwards sliding, characterised in that two groove-shaped depressions (8) which extend substantially one next to the other are provided, a front end (9) and/or rear end (10) of one groove-shaped depression (8) being arranged at a spacing from the front end (9) and/or rear end (10), respectively, of the other depression (8) in the longitudinal direction of the cross-country ski (1).
2. Cross-country ski according to claim 1, characterised in that the at least two groove-shaped depressions (8) have substantially the same length.
3. Cross-country ski according to either claim 1 or claim 2, characterised in that the depressions (8) each have a groove bottom (12) in the running surface layer (3), the groove bottom (12) being formed by the continuous running surface layer (3).
4. Cross-country ski according to any of claims 1 to 3, characterised in that the running surface layer (3) has a greater thickness in the central region (7), in particular in the kick zone, than in a front and/or rear gliding portion (5, 6).
5. Cross-country ski according to any of claims 1 to 4, characterised in that the running surface layer (3) has a material thickness of from 1 mm to 5 mm, preferably of from 2 mm to 4 mm, in particular of substantially 3 mm, in the central region (7).
6. Cross-country ski according to any of claims 1 to 5, characterised in that the front and rear gliding portion (5, 6) has a substantially constant first thickness and the central region (7) of the running surface layer (3) has a substantially constant second thickness.
7. Cross-country ski according to claim 6, characterised in that the running surface layer (3) has a wedge-shaped transition region between both the front and rear gliding portion (5, 6) and the central region (7).
8. Cross-country ski according to any of claims 4 to 7, characterised in that a lower reinforcement layer (14) adjoining the running surface layer (3) is adapted to the various thicknesses of the running surface layer (3).
9. Cross-country ski according to any of claims 1 to 8, characterised in that the running surface layer (3) comprises a plurality of parts, in particular a running surface front part (3a), a running surface rear part (3b), and a running surface central part (3c) comprising the at least two groove-shaped depressions (8).
10. Cross-country ski according to any of claims 1 to 9, characterised in that at least one groove-shaped depression (8) has a greater depth in a region that is at the front when viewed in the longitudinal direction of the cross-country ski (1), in particular in the first third of the longitudinal extension, than in the remaining region, the region of greater depth preferably being tapered towards the rear in the manner of a wedge.
11. Cross-country ski according to any of claims 1 to 10, characterised in that at least one groove-shaped depression (8) has a smaller depth in a region that is at the rear when viewed in the longitudinal direction of the cross-country ski (1), in particular in the last third of the longitudinal extension, than in the remaining region, the region of smaller depth preferably being tapered towards the rear in the manner of a wedge.
12. Cross-country ski according to any of claims 1 to 11, characterised in that the front end and/or rear end (9, 10) of the groove-shaped depressions (8) are arranged at a mutual spacing of from 20 to 150 mm.
13. Cross-country ski according to any of claims 1 to 12, characterised in that all groove-shaped depressions (8) have substantially the same length and width.
14. Cross-country ski according to any of claims 1 to 13, characterised in that a skin strip, a foil strip having a profile that prevents backwards sliding, a kick wax or a rubber-filled plastics film is provided as the element (11) that prevents backwards sliding.
15. Cross-country ski according to any of claims 1 to 14, characterised in that the element (8) that prevents backwards sliding is detachably connected to the running surface (3), in particular by means of an adhesive or a hook and loop fastener.

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