EP2055358A1 - Snowboard, dessen Gleitseite eine Rille aufweist - Google Patents

Snowboard, dessen Gleitseite eine Rille aufweist Download PDF

Info

Publication number
EP2055358A1
EP2055358A1 EP08305672A EP08305672A EP2055358A1 EP 2055358 A1 EP2055358 A1 EP 2055358A1 EP 08305672 A EP08305672 A EP 08305672A EP 08305672 A EP08305672 A EP 08305672A EP 2055358 A1 EP2055358 A1 EP 2055358A1
Authority
EP
European Patent Office
Prior art keywords
groove
gliding
sole
board according
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08305672A
Other languages
English (en)
French (fr)
Other versions
EP2055358B1 (de
Inventor
Jacques Cuenot
Christophe Gerossier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skis Dynastar SA
Original Assignee
Skis Dynastar SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Skis Dynastar SA filed Critical Skis Dynastar SA
Publication of EP2055358A1 publication Critical patent/EP2055358A1/de
Application granted granted Critical
Publication of EP2055358B1 publication Critical patent/EP2055358B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • A63C5/0422—Longitudinal guiding grooves
    • 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
    • A63C5/056—Materials for the running sole

Definitions

  • the invention relates to the field of snow sports and more particularly sports using a snowboard such as downhill skiing in particular, but also snowboarding or even cross-country skiing.
  • It relates more particularly to a method of manufacturing the sole glide such boards, to obtain a highlight of the grooves carved on its surface.
  • the gliding boards and in particular the alpine skis may have grooves which are oriented substantially parallel to the sliding direction, that is to say generally along the longitudinal axis of the ski. These grooves form a depression relative to the rest of the plane of the gliding base and are intended to improve the stability of the trajectory. Indeed, the slight hollow formed by this groove is at least partially filled with snow which creates a kind of rail on which slides the ski. It is less likely to deviate from the direct path.
  • these grooves were formed by machining the sliding surface. This simple technique was effective for skis made of wood, and more generally by skis whose gliding surface was formed by the underside of the core.
  • the structures combining different materials have the advantage of being able to use materials whose properties are optimized for the function corresponding to their location.
  • the gliding sole is thus generally made of a material having a low coefficient of friction with respect to snow, while conversely, the core may be made of a material ensuring the filling of the volume of the board, and allowing and to position mechanical reinforcing elements to impart the desired stiffness to the ski.
  • machining of the lower layer forming the sliding sole is limited, given the thickness of this layer at the groove. It causes a decrease in this thickness, which is not desirable because it weakens the sole.
  • methods of making the grooves during molding of the board have been developed.
  • the bottom of the mold accommodating the layer forming the sliding sole has protruding areas having a shape complementary to future grooves that will be formed during molding.
  • the lower layer forming the gliding base thus deforms during molding and maintains a constant thickness.
  • the core of the board can be made in different ways, for example from a pre-existing element, which thus comprises recesses in line with future grooves.
  • the ski can also be made by an injection method in which the core material expands itself just press the sole glide on the reliefs of the bottom of the mold.
  • One of the objectives of the invention is to allow the development of the grooves present under the board.
  • the gliding sole has a surface condition that is unsuitable for sliding.
  • the sole must therefore undergo several wheeled passages which aim to structure the ski sole by generating oriented micro-reliefs and thus eliminate a surface condition that is too smooth or rough in a random manner.
  • the bottom of the groove being an area set back from the rest of the sole, it is inaccessible for grinding operations.
  • the bottom of the groove can not be treated, and retains its surface state resulting from molding, which is not conducive to sliding.
  • the snow that can stick to the sole at the groove can hinder sliding. This disadvantage is all the more marked that the area occupied by the groove or grooves is important.
  • Another object of the invention is to overcome this disadvantage.
  • the invention therefore relates to a gliding board which has a lower layer forming the sliding sole which comprises at least one groove oriented substantially parallel to the direction of sliding. This groove forms a depression relative to the rest of the gliding sole which is substantially flat.
  • the layer forming the sliding sole has a fraction whose shape corresponds at least partially to that of the groove or grooves. This fraction is made of a material distinct from the material of which the rest of the lower layer is formed.
  • the invention consists in using a gliding sole which is constituted by the assembly of different elements having distinct properties, forming a layer attached under the core of the board.
  • the specific fraction has a color sufficiently distinct from the rest of the sole to highlight the groove.
  • the boundary between the two differently colored materials is in close proximity to the groove boundaries.
  • This construction can adapt to any kind of groove geometry, for example grooves having a variable width and / or depth along the length of the board, as well as multiple grooves, aligned or not, as described in the document EP 1 053 124 .
  • the fraction of the sole that is cut according to the shape of the groove can correspond exactly to the same profile, and have the entirety of its outline which is in line with the limits of the groove. It is also possible that this fraction completely covers the groove, having only a portion of its contour coinciding with the groove boundaries, thus a portion of the characteristic element extending beyond the groove.
  • this sealing film is not absolutely essential, insofar as the gliding sole undergoes a passage to the grinding wheel after manufacture. This passage to the grinding wheel thus eliminates any burrs that could have crossed in case of absence of sealing film.
  • the assembly of the different fractions constituting the gliding sole can be done by various means and in particular by adhesive tapes or openwork gluing elements, having an almost zero influence on the mechanical properties of the ski.
  • the bottom of the groove being an area set back from the rest of the sole, it is difficult to access for grinding operations.
  • special arrangements can be made for the material present in the groove.
  • the board can include different types of reinforcement variables according to the desired mechanical properties and the manufacturing process.
  • These reinforcements may be fibrous based, and include a polymerized resin.
  • the reinforcement conforms to the shape of the groove during molding or injection operations.
  • the reinforcement may also be metal-based, and have a central opening in which is embedded the groove of the sole during molding or injection.
  • the invention is applied to an alpine ski (1) whose gliding sole (2) has a groove (3).
  • This groove (3) is dug under the gliding surface, and extends parallel to the median longitudinal axis (4) of the ski, which corresponds to the direction of progression and sliding.
  • the ski (1) has only one groove (3), but the principle of the invention can extend to skis having a higher number of grooves, without limitation on their geometry or their location.
  • the gliding sole (2) is constituted by a layer made of a material having a low coefficient of friction with respect to snow. This layer extends from the front to the back of the ski, and is laterally bordered with metal edges (5).
  • this layer is constituted by the assembly of two elements, namely, a first element (11) to the dimensions of the groove, and a second element (10) for forming the remainder of the sliding surface, which is substantially planar, and which has a recess (12) of the size of the first element (11).
  • These two elements (10, 11) are produced by conventional methods, for example using laser cutting or cutting with blades, to ensure a coincidence of the cutting patterns, and an assembly without play.
  • the main element (10) of the gliding base (2) can be made of a material such as high density polyethylene, obtained by sintering, cutting or extrusion, and preferably loaded with graphite. This material is pigmented to possess a given color.
  • the additional element (11) which forms the central fraction of the gliding layer is made of a separate material. It can be a material that has a different chemical composition, by adding specific charges. It may also be a material which has a chemical composition similar to that of the main element material (10), but which has been given a different pigmentation, giving it a distinct color.
  • the material of one and / or the other fractions of the soleplate may also be transparent in order to reveal the underlying layers, and in particular any reinforcements located under the core.
  • the two elements (10, 11) are assembled as shown in FIG. figure 3 to form a single layer (2).
  • the assembly of the two elements (10, 11) can be done in various ways, and in particular by the introduction of an adhesive element (15) which also ensures a seal at the zones (16, 17) of boundary between the two elements (10, 11).
  • an additional element forming an adhesive network may be placed on the upper face of the future gliding layer (2), in order to ensure the joining of the two elements.
  • This openwork network does not prevent the contact between the gliding layer (2) and the elements, in particular adhesives, intended to cover the gliding sole.
  • the gliding layer (2) is placed in a mold (20) for the manufacture of the ski.
  • the bottom of the mold (20) has a boss (21) in the shape complementary to the groove.
  • the gliding layer (2) is flat, and not yet deformed, it has a slightly greater width than it will occupy once the finished ski. This is why after the placing of the metal edges (5) which are held in the mold by magnetic systems, the layer (2) of the sole is very slightly curved. In practice, the layer (2) has a thickness of about one millimeter.
  • the groove has a depth that can vary over the length and / or the width of the board, between the tenth of a millimeter, beyond the millimeter. In the latter case, the depth of the groove is greater than the thickness of the gliding layer (2). This depth and thickness are measured after grinding by comparing the altitudes of the structured sliding surfaces. The depth of the groove can also be measured by difference in altitude on the upper face of the gliding layer, between the groove area and the remainder of the sole.
  • the central element (3) forming the fraction in line with the future groove is opposite the boss of the bottom of the mold.
  • the bottom (20) of the mold receives the different constituent elements of the ski.
  • the ski can thus include a layer (30) of lower reinforcement, typically based on a fibrous material impregnated with resin, which will adopt its final shape during molding, by polymerization of the resin.
  • the core is realized by a pre-existing element, which includes under its face lower a groove (32) corresponding to the groove (3) that is sought to form under the gliding sole.
  • this core (31) is laterally bordered by longitudinal reinforcing elements (33) forming the edges. It is covered with a reinforcing layer (37), itself covered with a layer (38) upper protection and decoration.
  • the deformation of the layer (2) of the gliding base is particularly involved in the areas of slope failure that are the boundaries of the groove (3).
  • a precise fit and no play at the two elements (10, 11) constituting the gliding base allows maintaining a seal of this layer despite the high mechanical stresses. This seal can be improved by the presence of a film designed for this purpose.
  • the invention is not limited to only one embodiment, and can instead be adapted to various manufacturing processes, whether it be molding to assemble pre-existing elements, or else by an in-situ injection to make the core during molding.
  • the invention also makes it possible to use various types of reinforcement in the lower part of the structure, and more specifically in direct contact with the gliding sole.
  • these reinforcements (40) may be based on fibers impregnated with a polymerizing resin during the molding operation, or during the injection of the nucleus in-situ .
  • This reinforcement thus marries the shape of the groove (3) conforming to the upper surface of the gliding sole (2).
  • This reinforcement may also consist of a metal sheet (42), as illustrated in FIG. figure 7 .
  • a central opening (43) is provided in which may deform the gliding sole (2) during molding, without causing the movement of the sheet (42).
  • the ski After molding, the ski has a gliding sole (2) particularly smooth, the surface condition is not really suitable for sliding. In this case, it is necessary to create a slightly rough surface condition by passing over a grinding wheel. This step also makes it possible to eliminate any irregularities and in particular resin infiltrations that could have occurred between the characteristic elements (10, 11) of the gliding base (2).
  • the groove being inaccessible to a cylindrical grinding wheel, it is advantageous to use as a central element of the glide sole a pre-structured material, having a suitable surface condition, similar to that of the remainder of the sole after passing through. the grinding wheel.
  • the invention applies not only to alpine skis as illustrated in the figures, but to all kinds of gliding boards which have grooves dug in their gliding sole.

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  • Laminated Bodies (AREA)
EP08305672A 2007-10-31 2008-10-10 Snowboard, dessen Gleitseite eine Rille aufweist Expired - Fee Related EP2055358B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0758719A FR2922777B1 (fr) 2007-10-31 2007-10-31 Planche de glisse dont la semelle de glisse presente une rainure.

Publications (2)

Publication Number Publication Date
EP2055358A1 true EP2055358A1 (de) 2009-05-06
EP2055358B1 EP2055358B1 (de) 2012-05-16

Family

ID=39099794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08305672A Expired - Fee Related EP2055358B1 (de) 2007-10-31 2008-10-10 Snowboard, dessen Gleitseite eine Rille aufweist

Country Status (2)

Country Link
EP (1) EP2055358B1 (de)
FR (1) FR2922777B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107185219A (zh) * 2017-03-29 2017-09-22 牡丹江雪城机械制造有限责任公司 底面上凹弧形快速滑雪板

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259327A (en) * 1938-05-04 1941-10-14 Eric Pusinelli Ski runner
DE737406C (de) * 1939-07-29 1943-07-13 Oskar Steffen Ski mit Einsatzschiene in der Schneefuehrungsnut und metallenen Seitenschutzkanten
DE8806015U1 (de) * 1988-05-03 1988-06-23 Friedrich, Rainer, 2121 Deutsch Evern, De
EP1053124A1 (de) 1998-02-05 2000-11-22 Merz Sauter Zimmermann GmbH Entfaltbare dachkonstruktion
WO2003000483A1 (de) * 2001-06-23 2003-01-03 Spaeth Bernd Körper mit verbesserten oberflächen-eigenschaften
US20030090086A1 (en) * 2001-11-15 2003-05-15 Gousie Michael B. Ski for uphill and downhill skiing
DE102004061588A1 (de) * 2004-01-30 2005-08-18 Elan D.D. Gegen Verschleiß und mechanische Beschädigungen widerstandsfähiger Ski und/oder widerstandsfähiges Snowboard
EP1690571A1 (de) * 2005-02-12 2006-08-16 S.K.I. GmbH & Co.KG Sprungski

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793154B1 (fr) * 1999-05-06 2001-06-01 Rossignol Sa Ski alpin

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259327A (en) * 1938-05-04 1941-10-14 Eric Pusinelli Ski runner
DE737406C (de) * 1939-07-29 1943-07-13 Oskar Steffen Ski mit Einsatzschiene in der Schneefuehrungsnut und metallenen Seitenschutzkanten
DE8806015U1 (de) * 1988-05-03 1988-06-23 Friedrich, Rainer, 2121 Deutsch Evern, De
EP1053124A1 (de) 1998-02-05 2000-11-22 Merz Sauter Zimmermann GmbH Entfaltbare dachkonstruktion
WO2003000483A1 (de) * 2001-06-23 2003-01-03 Spaeth Bernd Körper mit verbesserten oberflächen-eigenschaften
US20030090086A1 (en) * 2001-11-15 2003-05-15 Gousie Michael B. Ski for uphill and downhill skiing
DE102004061588A1 (de) * 2004-01-30 2005-08-18 Elan D.D. Gegen Verschleiß und mechanische Beschädigungen widerstandsfähiger Ski und/oder widerstandsfähiges Snowboard
EP1690571A1 (de) * 2005-02-12 2006-08-16 S.K.I. GmbH & Co.KG Sprungski

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107185219A (zh) * 2017-03-29 2017-09-22 牡丹江雪城机械制造有限责任公司 底面上凹弧形快速滑雪板

Also Published As

Publication number Publication date
FR2922777B1 (fr) 2009-12-18
FR2922777A1 (fr) 2009-05-01
EP2055358B1 (de) 2012-05-16

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