EP0657192B1 - Ski mit angepasster Strukturierung abhängig von der Lage der Gleitfläche - Google Patents

Ski mit angepasster Strukturierung abhängig von der Lage der Gleitfläche Download PDF

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Publication number
EP0657192B1
EP0657192B1 EP94116597A EP94116597A EP0657192B1 EP 0657192 B1 EP0657192 B1 EP 0657192B1 EP 94116597 A EP94116597 A EP 94116597A EP 94116597 A EP94116597 A EP 94116597A EP 0657192 B1 EP0657192 B1 EP 0657192B1
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EP
European Patent Office
Prior art keywords
width
ski
zone
lateral
ski according
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Expired - Lifetime
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EP94116597A
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English (en)
French (fr)
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EP0657192A1 (de
Inventor
Bertrand Krafft
Gilles Silva
Jacques Le Masson
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Salomon SAS
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Salomon SAS
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Publication of EP0657192B1 publication Critical patent/EP0657192B1/de
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/044—Structure of the surface thereof of the running sole

Definitions

  • the invention relates to a ski for evolution on snow, such as an alpine ski, a monoski or snowboard.
  • It relates more particularly to a ski provided with a lower sole topped with streaks, whose sliding ability has been improved.
  • the sliding surface is provided with ridges discontinuous oriented in the longitudinal direction whose shape is wavy, of pace generally sinusoidal, so as to preferably give the sole a roughness coefficient Ra within an appropriate value range.
  • the object of the present invention is to provide a satisfactory solution to these problems.
  • the Applicant has in fact found that there exists at a surface of sliding of the stressed areas differently on snow, and that consequently the structure had to be adapted to take this into account.
  • the central region of the sole plays an important role in the flat gliding of the ski, so it is important that it is strongly structured to allow good flow and avoid the suction phenomenon.
  • the invention therefore aims to provide a ski for evolution on snow comprising a lower surface of variable width (L) made of plastic, provided with a plurality of discontinuous stripes and two lateral edges which border laterally said surface; which is based on a front contact line and a rear contact line when the ski is unloaded.
  • L variable width
  • the lower surface includes a central flat glide area extending between the two lines of contact, and on at least one side, a curved sliding side zone bordering said central zone between the two contact lines, the width (l1) of which is greater than 0.03 L; the surface of the rear part at least, of said zone center, between the rear contact line and the center line of ski boot, being provided with a marked structure such that the values measured significant roughness parameters Rtm and Rku are greater than values measured on the surface of said lateral sliding curve area.
  • the lower surface comprises two symmetrical lateral zones relative to the longitudinal axis of the ski, bordering on both sides the central area.
  • the parameters Rtm and Rku used are those among the roughness parameters which make it possible to best appreciate on a surface the difference between a strong or marked structuring effective for breaking and evacuating the water film according to the invention and a finer or less marked structure limiting friction with snow when cornering.
  • the Rtm parameter designates the average of the maximum roughnesses which measure the vertical distance between the highest point and the lowest point of the roughness profile over the total evaluation length, according to DIN 4762 / 1E or ISO 4287/1.
  • the Rku (Roughness Kurtosis) parameter designates the flattening parameter of the density of height distribution. The flatter the density curve, the more Rku is great; on the contrary, if the curve is pointed and its maximum well centered, Rku is low (ISO Standard 4287/1).
  • the Rtm value is less than or equal to 15 ⁇ m and the Rku value is less than or equal to 3 in the surface of said lateral zone (s), then that Rtm> 15 ⁇ m and Rku> 3 in the rear part, at least, of the central zone as defined above.
  • the width (l1) of the lateral zone (s) is between 0.03 L and 0.3 L, knowing that the width (l2) of the central zone of sliding flat must remain greater than or equal to 0.45 L.
  • the width (l1) of the lateral zone (s) increases from from the vicinity of the minimum bottom surface width line (L min), in direction of contact lines. Indeed, it is advantageous to reserve a surface more or less striated at the ends in order to improve the easy pivoting of the ski. Thus, it is preferable that the width (l1) is greater than or equal to 2 mm in the vicinity of the surface width line lower (L min) and is greater than or equal to 10 mm in the vicinity of the lines of ski contact.
  • the width (l2) of the central zone strongly striated is constant.
  • the structuring of the central area is achieved by passing a tool under the hot and pressurized sole shape of a roll comprising a relief pattern with constant width (l) of edges on the surface of which a plurality of discontinuous ribs is formed.
  • the width (l1) of the area (s) lateral (s) is constant and the width (l2) of the central zone of sliding flat gradually increases from the vicinity of the minimum width (L min) in direction of contact lines.
  • the width (l1) of the lateral zone (s) is greater than or equal to 6 mm.
  • the central zone strongly structured comprises a plurality of short, straight and discontinuous streaks, arranged in separate or nested rows.
  • At least a majority of streaks are oriented along the longitudinal axis of the ski. Some may, however, be inclined and present an angle relative to the longitudinal axis, so in particular to avoid an excessive rail effect or to improve the release of the water film in certain snow conditions or for certain types of skis.
  • the structuring presents a roughness gradient such that the measured parameters Rtm and Rku gradually increase from the edge towards the longitudinal axis over at least a significant part of the width of the lower surface being understood that the roughness (Rtm and Rku) can remain substantially constant over small portions of width. This may be the case, for example, by predicting a gradual increase in streak density, an increase in certain streak parameters (depth, width, length, shape, etc.).
  • the structuring along the axis longitudinal has a roughness gradient such that the measured parameters Rtm and Rku vary gradually, from the rear contact line towards of the front contact line, over at least a substantial part of the length ski ; it being understood that the roughness can remain substantially constant over certain portions of length.
  • FIG. 1 it is an alpine type ski with a view to below, where we can see the bottom surface or gliding sole (1) in polyethylene, the side edges (2), the tip (3) and the heel (4).
  • the sole is arched and rests on a front contact line (10) and a rear contact line (11) when the ski is unloaded.
  • a front contact line (10) and a rear contact line (11) When the ski is unloaded.
  • the area between these two contact lines (10, 11) meets the snow and becomes the so-called "bearing" surface of the ski.
  • a central zone (5) known as "gliding flat" is formed on the bearing surface, of width (l2) in which a significant structuring is carried out.
  • Figure 1a shows, in enlarged view, an example of significant structuring according to the invention. It can be a multitude of short straight (50), discontinuous and arranged in rows nested one inside the other.
  • the bearing surface comprises, on either side of the central zone (5), two lateral zones (6, 7) of sliding in curve, of width (l1). These areas have a less marked structure in which the streaks (70) are more spaced, more short, shallower and narrower, for example, than those in the area central ( Figure 1b). Structuring could also be almost non-existent and the surface as smooth as possible.
  • Figure 2 shows the ski when a turn is engaged and its inclination by compared to the surface of the ground. Part of the sole penetrates more or less deep in snow or ice, depending on conditions, thanks to the cut exercised by the edge (2).
  • the width (L) of the sole varies to follow the side line of the ski.
  • the width (l1) is always greater than 0.03 L, at any point of width (L) of the sole, measured between the contact lines (10, 11).
  • (l1) is between 0.03 L and 0.3 L, knowing that (l2) must remain greater than or equal to 0.45 L.
  • (l1) can be between 3 mm and 25 mm, approximately and (l2) is greater than 27 mm.
  • (l2) is constant between the contact lines (10, 11) and thus (11) varies gradually.
  • the width (l1) of each lateral zone (6, 7) gradually increases towards the lines contact (10, 11).
  • the roughness parameters are measured perpendicular to the axis longitudinal of the ski; just like the width measurements L, l1, l2.
  • Figures 3 and 4 illustrate an advantageous example for performing the structuring of the sole of a ski according to the invention and more particularly in the case where it is desired to obtain a constant width (l2) of the central zone (5) of the lower surface giving a variable width (l1) of the lateral zones (6, 7).
  • a device comprising a heated tool (8) having the form of a roller and which has on its surface a relief pattern with constant width (l) edges, comprising a plurality of discontinuous ribs (80).
  • the surface of the roller is applied, under pressure, against the surface of the sole (1) of the ski to prepare by operating a longitudinal scrolling of the ski between several skids of guide (9).
  • FIG. 5 shows a variant of the invention in which the width (l1) of the lateral zones of sliding in curve is constant along the ski. Because of the coast line of the ski which gives the lower surface a width (L) which is variable shape of "wasp waist” the width (l2) of the central flat glide area is also variable along the ski and increases from the vicinity of the line of width (L min) towards the contact lines (10, 11) of the ski.
  • FIG. 6 only the rear part of the central zone (5), lying between the rear contact line (11) and the shoe center line (12) is provided with streaks.
  • the shoe center line (12) is a line given by each manufacturer and its position in relation to the ski environment can vary from one type of ski to the other.
  • the front part between the front contact line (10) and the middle line shoe (12) is slightly or not striated so that the roughness parameters Rtm, Rku defined in the front part are close to the values or equal to respective values of the lateral zones (6, 7) of sliding in curve. Tests performed by the applicant have demonstrated that such a configuration may be more effective in certain snow conditions.
  • the structuring of the central zone (5) presents a roughness gradient such that the measured parameters Rtm and Rku decrease gradually, from the rear contact line (11) towards the line front contact (10).
  • This gradient can be obtained for example by making gradually reduce the number of streaks and their size (length, width and depth) from the rear line (11) to the front line (10).
  • the Rtm and Rku values can be substantially constant in the central area (5).
  • the decreasing progression of the values Rtm and Rku is done in stages, i.e. by a series of adjacent short portions in which the values Rtm and Rku are substantially constant but vary from one portion adjacent to the other.
  • the length of the streaks can vary, in general, between 4 mm and 50 mm depending on the type of snow and type of ski used.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Road Paving Structures (AREA)
  • Laminated Bodies (AREA)

Claims (14)

  1. Ski zur Bewegung auf Schnee mit einer unteren Oberfläche (1) von veränderlicher Breite (L) aus Kunststoffmaterial, die mit einer Anzahl von unterbrochenen Rillen (50, 70) und zwei Seiterkanten (2), die die Oberfläche (1) längsseitig begrenzen, versehen ist, welche auf einer vorderen Kontaktlinie (10) und einer hinteren Kontaktlinie (11) ruht, wenn der Ski nicht belastet ist; wobei die untere Oberfläche (1) versehen ist mit einem mittleren Bereich des Flachgleitens (5), welcher sich zwischen den zwei Kontaktlinien (10, 11) erstreckt, und mindestens auf einer Seite einen Längsbereich zum Kurvengleiten (6, 7), welcher an den mittleren Bereich (5) zwischen den zwei Kontaktlinien angrenzt und dessen Breite (l1) größer als 0,03 L ist; wobei die Oberfläche mindestens des hinteren Teils des mittleren Bereiches (5) zwischen der hinteren Kontaktlinie (11) und der Mittellinie des Skischuhs (12) versehen ist mit einer markierten Strukturierung in der Weise, daß die gemessenen Werte der Parameter, welche die Rauigkeit Rtm und Rku angeben, größer sind als die Werte, die auf der Oberfläche des Längsbereiches des Kurvengleitens (6, 7) gemessen werden.
  2. Ski nach Anspruch 1, dadurch gekennzeichnet, daß die untere Oberfläche zwei Längsbereiche (6, 7) aufweist, die symmetrisch in Bezug zur Längsachse des Ski sind und beiderseitig an dem mittleren Bereich (5) angrenzen.
  3. Ski nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß der Wert Rtm kleiner oder gleich 15µm und der Wert Rku kleiner oder gleich 3 in der Oberfläche des(der) Seitenbereiche(s) (6, 7), wohingegen Rtm > 15µm und Rku > 3 mindestens in dem hinteren Teil des mittleren Bereiches (5) ist.
  4. Ski nach einem beliebigen der Ansprüche 1, 2 oder 3, dadurch gekennzeichnet, daß die Breite (l1) des(der) Seitenbereiche(s) (6, 7) zwischen 0,03 L und 0,3 L liegt, wobei die Breite (l2) des mittleren Bereiches des Flachgleitens größer oder gleich 0,45 L ist.
  5. Ski nach einem beliebigen der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Breite (l1) des(der) Seitenbereiche(s) (6, 7) ansteigt ab nahe der Linie der minimalen Breite der unteren Oberfläche (L min) in Richtung der Kontaktlinie (10, 11).
  6. Ski nach Anspruch 5, dadurch gekennzeichnet, daß die Breite (l2) des mittleren Bereiches (5), der stark gerillt ist, konstant ist.
  7. Ski nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Breite (l1) des(der) Seitenbereiche(s) (6, 7) größer oder gleich 2 mm nahe der Linie der minimalen Breite (L min) ist und (l1) größer oder gleich 10 mm nahe der Kontaktlinien (10, 11) ist.
  8. Ski nach einem beliebigen der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Breite (l1) des(der) Seitenbereiche(s) (6, 7) konstant ist und die Breite (l2) des mittleren Bereiches des Flachgleitens (5) zunehmend ansteigt ab nahe der minimalen Breite (L) in Richtung der Kontaklinien (10, 11).
  9. Ski nach Anspruch 8, dadurch gekennzeichnet, daß die Breite (l1) des(der) Seitenbereiche(s) (6, 7) größer oder gleich 6 mm ist.
  10. Ski nach einem beliebigen der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der stark strukturierte mittlere Bereich (5) eine Anzahl von kurzen, geradlinigen und diskontinuierlichen Rillen (50) aufweist, die in getrennten oder überlappenden Reihen angeordnet sind.
  11. Ski nach Anspruch 10, dadurch gekennzeichnet, daß mindestens eine Mehrzahl der Rillen (50) entlang der Längsachse des Ski ausgerichtet sind.
  12. Ski nach einem beliebigen der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Strukturierung einen Gradienten der Rauigkeit in der Weise aufweist, daß die gemessenen Parameter Rtm und Rku zunehmend ansteigen ab der Kante (2) in Richtung der Längsachse mindestens über einen beträchtlichen Teil der Breite (L) der unteren Oberfläche, wobei natürlich die Rauigkeit (Rtm und Rku) im wesentlichen konstant über kleine Breitenabschnitte sein kann.
  13. Ski nach einem beliebigen der vorangegangen Ansprüche, dadurch gekennzeichnet, daß die Strukturierung entlang der Längsachse einen Rauigkeitsgradienten in der Weise aufweist, daß die gemessenen Parameter Rtm und Rku sich zunehmend ändern ab der hinteren Kontaktlinie (11) in Richtung der vorderen Kontaktlinie (10) mindestens über einen wesentlichen Teil der Länge des Ski, wobei natürlich die Rauigkeit im wesentlichen konstant über bestimmte Abschnitten der Länge (ΔL) sein kann.
  14. Verfahren zur Herstellung eines Ski nach Anspruch 1, dadurch gekennzeichnet, daß die Strukturierung des mittleren Bereiches (5) ausgeführt wird durch den Übergang über die Sohle (1) unter Wärme und Druck eines Werkzeugs (8) in Form einer Walze, die ein Bördelreliefmotiv mit konstanter Breite (l) aufweist, auf deren Oberfläche eine Anzahl von unterbrochenen Rippen (80) gebildet ist.
EP94116597A 1993-12-09 1994-10-21 Ski mit angepasster Strukturierung abhängig von der Lage der Gleitfläche Expired - Lifetime EP0657192B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9315020A FR2713497B1 (fr) 1993-12-09 1993-12-09 Ski comprenant une structuration adaptée en fonction des zones de glisse en courbe et de la zone de glisse à plat repérable sur ledit ski.
FR9315020 1993-12-09

Publications (2)

Publication Number Publication Date
EP0657192A1 EP0657192A1 (de) 1995-06-14
EP0657192B1 true EP0657192B1 (de) 1998-05-13

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EP94116597A Expired - Lifetime EP0657192B1 (de) 1993-12-09 1994-10-21 Ski mit angepasster Strukturierung abhängig von der Lage der Gleitfläche

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US (1) US5727807A (de)
EP (1) EP0657192B1 (de)
JP (2) JPH07194761A (de)
AT (1) ATE165987T1 (de)
DE (1) DE69410221T2 (de)
FR (1) FR2713497B1 (de)

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JP2611134B2 (ja) * 1993-11-16 1997-05-21 川崎重工業株式会社 エンジンの吸気装置
NO940482D0 (no) * 1994-02-11 1994-02-11 Joergen Karlsen Alpin parski
US6663137B2 (en) 1998-03-10 2003-12-16 Karlsen Joergen Snowboard
FR2800622B1 (fr) * 1999-11-05 2002-02-08 Salomon Sa Planche de glisse destinee a la pratique du surf sur neige
US20030127812A1 (en) * 2002-01-04 2003-07-10 Charles Mehrmann Bi-directional sliding board
AT410900B (de) * 2002-01-22 2003-08-25 Fischer Gmbh Verfahren zur herstellung einer strukturierten lauffläche für gleiteinrichtungen sowie eine nach diesem verfahren hergestellte strukturierte lauffläche
FR2845611B1 (fr) * 2002-10-15 2004-12-03 Rossignol Sa Planche de glisse sur neige a spatule et a releve de talon ameliores
US6857653B2 (en) 2002-10-31 2005-02-22 Anton F. Wilson Gliding skis
AT500213B1 (de) * 2003-04-23 2007-09-15 Atomic Austria Gmbh Schi
US7073810B2 (en) * 2003-06-25 2006-07-11 Wilson Anton F Ski with tunnel and enhanced edges
US20050280230A1 (en) * 2004-06-18 2005-12-22 Chorng-Jiang Lin Anti-slip surface for skateboards
AT502718B1 (de) * 2006-03-23 2007-05-15 Fischer Gmbh Ski
FR2926735B1 (fr) * 2008-01-25 2010-03-26 Salomon Sa Ski alpin avec moyens de reglage
US8061731B2 (en) * 2009-01-05 2011-11-22 Michael John Popenas Ski brake
AT514124A1 (de) * 2013-03-22 2014-10-15 Fischer Sports Gmbh Aufstiegshilfe für einen Ski sowie Verfahren zur Herstellung
AT514968B1 (de) * 2013-10-22 2017-11-15 Fischer Sports Gmbh Lauffläche für einen Ski
CH710453A2 (de) * 2014-12-09 2016-06-15 Ruoss Robert Schneegleitelement.
US11065528B2 (en) * 2018-09-18 2021-07-20 Stephen S. Daniell Thrust-responsive surface material for skis
WO2023022114A1 (ja) * 2021-08-18 2023-02-23 株式会社フジミインコーポレーテッド 滑走用具及びその製造方法

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FR934319A (fr) * 1946-09-24 1948-05-19 Perfectionnements aux skis et analogues
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DE2623852A1 (de) * 1975-06-17 1976-12-23 Fischer Gmbh Ski
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AT355467B (de) * 1977-09-26 1980-03-10 Kuntara Wilhelm Dr Ski, insbesondere langlauf- oder loipenski
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CH670571A5 (en) * 1985-04-30 1989-06-30 Blizzard Gmbh Facing esp. for langlauf ski
FR2643565A1 (fr) * 1989-02-24 1990-08-31 Grand Chavin Skis Ski de fond
AT398038B (de) * 1989-11-02 1994-08-25 Fischer Gmbh Ski
FR2683730B1 (fr) * 1991-11-19 1995-03-31 Rossignol Sa Ski, ou autre engin ou planche de glisse sur neige, a semelle striee.
US5344177A (en) * 1992-04-28 1994-09-06 Minnesota Mining And Manufacturing Company Ski base and running surface

Also Published As

Publication number Publication date
DE69410221D1 (de) 1998-06-18
EP0657192A1 (de) 1995-06-14
US5727807A (en) 1998-03-17
FR2713497B1 (fr) 1996-02-02
ATE165987T1 (de) 1998-05-15
DE69410221T2 (de) 1998-11-12
JP3037260U (ja) 1997-05-16
JPH07194761A (ja) 1995-08-01
FR2713497A1 (fr) 1995-06-16

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