EP0549481A1 - Gleitbrett mit Vibrationsdämpfungseinrichtung - Google Patents

Gleitbrett mit Vibrationsdämpfungseinrichtung Download PDF

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Publication number
EP0549481A1
EP0549481A1 EP92420408A EP92420408A EP0549481A1 EP 0549481 A1 EP0549481 A1 EP 0549481A1 EP 92420408 A EP92420408 A EP 92420408A EP 92420408 A EP92420408 A EP 92420408A EP 0549481 A1 EP0549481 A1 EP 0549481A1
Authority
EP
European Patent Office
Prior art keywords
damping device
visco
gliding board
board according
ski
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
EP92420408A
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English (en)
French (fr)
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EP0549481B1 (de
Inventor
Yves Piegay
Jean Bauvois
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 Rossignol SA
Original Assignee
Skis Rossignol SA
Rossignol 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 Rossignol SA, Rossignol SA filed Critical Skis Rossignol SA
Publication of EP0549481A1 publication Critical patent/EP0549481A1/de
Application granted granted Critical
Publication of EP0549481B1 publication Critical patent/EP0549481B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • 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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/075—Vibration dampers

Definitions

  • the present invention relates to a board for gliding on snow or the like, such as a ski, a snowboard, etc., this board for gliding being provided with a device for damping vibrations.
  • a ski is a relatively complex shaped beam whose centers of gravity of the different sections are not aligned. This position of the centers of gravity is also variable depending on the different structures.
  • an assembly subjected to an external disturbance vibrates around one or more natural frequencies which are characteristic of its structure and which result from its stiffness and mass distributions.
  • the behavior and the feelings which result from these vibrations are influenced by the sum of the micro-displacements which are generated, in different directions.
  • the displacements are minimal at the nodes of vibration and are maximum at the bellies of vibration. These vibrations are damped more or less quickly depending on the damping characteristics of the structure.
  • vibrations to which a ski is subjected the bending vibrations in a plane perpendicular to the surface of the sole of the ski have been the subject of numerous researches. These vibrations essentially belong to the "first mode” of vibrations, that is to say harmonic N ° 1, and to the "third mode", that is to say to harmonic N ° 3.
  • Figure 1 shows schematically a ski in side view
  • FIGS. 2 and 3 respectively represent the deformations of this ski in maximum amplitude in the first and the third mode of vibrations.
  • the first mode is predominant for a special slalom ski, while the third mode is predominant for a giant slalom ski.
  • skis comprising, integrated into their structure, strips of visco-elastic material, the position and length of which are determined as a function of the vibrations to be damped, and consequently as a function of the characteristics which the ski must exhibit, depending on whether 'It is for example a special slalom ski or a giant slalom ski.
  • An object of the present invention is to solve, by a simple and inexpensive means, the problem of the damping of this combined vibration-flexion-torsion mode.
  • Figure 4 of the accompanying drawing schematically shows half of a ski, seen from above. The deformation of this ski in the above-mentioned combined bending-torsion mode is shown in dotted lines in this figure.
  • the gliding board according to the invention uses at least one damping device comprising at least one plate of visco-elastic material working in shear and associated with at least one stress element with high elasticity modulus which is either glued to this visco plate -elastic be drowned in the latter.
  • a damping device known as a "stress plate", and constituted, in a manner known per se (see for example document FR-A-2,575,393) on the one hand of a plate in visco-elastic material, for example the damping coefficient is at least 0.5 in an operating range ranging in temperature from -30 to + 30 ° C and in frequency from 0 to 300 Hz, and d on the other hand, a stress plate made of a material with a high modulus of elasticity, for example aluminum alloy.
  • the plate of visco-elastic material is then bonded between the upper surface of the gliding board and the stress plate.
  • the thickness of this visco-elastic material plate is between 0.5 and 1.2 mm while its damping coefficient is between 0.8 and 1.2, and the thickness of the stress plate is between 0.5 and 1.2 mm.
  • each shock absorber comprises a stress plate made of aluminum alloy, with a thickness of 0.6 mm, which is glued to a strip of visco-elastic material with a thickness of 0.8 mm and a coefficient d damping on the order of 0.8, optimal for a temperature of -10 ° and for vibration frequencies between 10 and 100 Hertz.
  • This damping device can also be a device composed of a plate of visco-elastic material in which steel wires are embedded, according for example to document FR-A-2,437,225. Instead of steel wire, it can moreover be glass or carbon wire. Instead of wires, it may be, for example according to document FR-A-2,237,653, a stress plate, for example metallic, which is therefore embedded in a visco-elastic plate, this stress plate preferably being openwork.
  • the ski can therefore comprise at least one visco-elastic damping device of the aforementioned type, which is placed in the area where the visco-elastic material is most stressed in shear deformation. It thus absorbs and dissipates an amount of energy which is not returned to the structure. The effect of the vibration is then modified, by "stifling" the amplitude of movement of the structure.
  • zones of maximum curvature for a special slalom ski are positioned, for a given structure, in the zone referenced "A" for the simple bending mode and in the zone “D” for the combined flexion-torsion flexion mode.
  • An object of the invention is therefore to provide, for a determined area, a unique and effective damping device in the different orientation planes of the ski structure.
  • the invention aims to improve the damping of the different modes of vibration developing in the structure of a gliding board, but in planes or surfaces oriented differently.
  • the damping device used is positioned locally so that its active zones correspond to the zones of maximum curvature respective to the different modes of vibration.
  • This gliding board is of the type comprising at least one vibration damping element which is either attached to the structure of the board or incorporated into this structure, and which comprises on the one hand at least one plate of viscoelastic material working in shear and d on the other hand at least one constraint element whose modulus of elasticity is very high compared to that of this visco-elastic material, this constraint element either being glued to the plate of viscoelastic material or embedded in it, and this damping device being positioned locally on or in the gliding board in determined zones thereof.
  • the damping device in this zone at least one damping device of the aforementioned type, but shaped so that its contact surface with the structure of the gliding board, instead of being conventionally flat or perhaps more or less curved, partially conforms to these zones, consequently following, at least in certain places, different planes of the board of slides, this damping device consequently having a three-dimensional shape combining several planes, oriented differently but at least one of which is substantially parallel to the upper plane of the board, the damping device being for example of L-section or in the shape of a U-shaped jumper.
  • FIG. 5 there is shown a portion of a snow ski 1, more specifically a piste ski, on the surface of which a vibration damping device 2 is attached.
  • This damping device 2 is of course, according to the teaching of the prior art, positioned locally on the ski 1 so that its active zones correspond to the maximum curvatures relating to the modes of vibration considered. It is however very special. It is of course and in accordance with the teaching of the prior art, a shock absorber working in shear and comprising a plate of visco-elastic material 3, which is bonded to the surface of the ski 1, and a conjugate plate 4 made of material with high modulus of elasticity (for example aluminum alloy). However, the lower part 5 of this damping device 2 with a stress plate does not adopt a continuous planar shape as is the case in this example for its upper part 6: as can be clearly seen in FIGS.
  • this device 2 has, in this lower zone 5, an inverted U-shaped section with short flared branches, that is to say in fact a section which, according to the invention, is three-dimensional combining several planes oriented differently , with at least one of these planes (as is the case here for the base of the "U") which is substantially parallel to the plane of the upper surface 7 of the ski.
  • This lower part 5 of the damper then allows the damping of vibrations which develop in three different planes or orientations, including the plane 7 of the ski and the planes 8, 9 of the edges of this ski.
  • the coupling which is carried out by the junctions 10 and 11 of the multiple faces of the constraint plate 4 provides an effect unexpected and much more effective than that which would be provided by several shock absorbers with practically flat stress plate according to the prior art, and which would be placed, in these same zones close to section VI-VI, on these same adjacent faces of the structure ski.
  • the damping device can either be, as is the case for FIG. 5, simply attached to the surface of the ski, or, as illustrated in FIG. 6, placed in a recess provided for this purpose and in at least two different planes in the structure 12 of the ski, so as to be flush with the rest of the surface of this ski, that is to say, according to a hybrid solution, having its lateral parts 13 (FIG. 8) embedded respectively in the edges 8,9 of the ski of so as to be flush with them, and its upper part 14 (that is to say that which covers a portion of the upper face 7 of the ski) simply attached without embedding on this face 7.
  • a hybrid solution having its lateral parts 13 (FIG. 8) embedded respectively in the edges 8,9 of the ski of so as to be flush with them, and its upper part 14 (that is to say that which covers a portion of the upper face 7 of the ski) simply attached without embedding on this face 7.
  • FIG. 8 also illustrates another advantageous form for the shock absorber 2.
  • shock absorber (s) could be totally or partially embedded in recesses provided for this purpose in the structure of the ski, instead of being directly attached to the latter.
  • the section of the stress plate, and therefore of the damping device could be L-shaped, as illustrated in Figure 7, and not U-shaped. It could, as shown in this same Figure 7, be placed so asymmetrical with respect to the median longitudinal axis of the board. It could also be with more or less rounded junctions, depending on the shape of the structure of the plank in this place.
  • this damping device can also take very diverse forms. modulating the damping surfaces according to the intensity and positioning of the curvature zones of the board structure. This form of damping device is adapted to the particular modes to be damped.
  • shock absorbers can be multiple, the location of these shock absorbers strongly depending, in general, on the proper structure of the gliding board.
  • the viscoelastic element 3 itself may not continuously conform to the complex shape of the constraint plate, but may be composed of several adjacent plates.
  • the same visco-elastic damping element 3 can be composed of several plates, either superimposed or juxtaposed, of different characteristics with respect to each other, and this in the same orientation plane or not.
  • the visco-elastic materials may also differ in the same way according to their orientation plane.
  • the thickness of the visco-elastic material can vary throughout the same visco-elastic plate: it can for example gradually increase from one end to the other of this plate and for example be of the order of 0, 5 mm at one end and around 2 mm at the other end.
  • FIG. 12 illustrates an embodiment according to which on the one hand the damping device 2 used is of another type, in this example of the type according to document FR-A-2,437,225 comprising stress wires 15 made of material to high modulus of elasticity (in steel for example) which are embedded as shown in a plate 16 of viscoelastic material, and on the other hand this damping device 2 is embedded in the structure 12 of the ski 1 as shown.
  • the damping device 2 used is of another type, in this example of the type according to document FR-A-2,437,225 comprising stress wires 15 made of material to high modulus of elasticity (in steel for example) which are embedded as shown in a plate 16 of viscoelastic material, and on the other hand this damping device 2 is embedded in the structure 12 of the ski 1 as shown.
  • This damping device 2 has a U-shaped section. It could also adopt an inverted U-shaped section according to FIG. 6, or even a coated L-shaped section according to FIG. 7 for example.
  • these stress wires 15 could be distributed asymmetrically in the visco-elastic plate 16 instead of being symmetrically and regularly distributed as in FIG. 12.
  • stress wires 15 could be replaced by a stress plate 15, according to the aforementioned document FR-A-2,237,653.
  • Figures 13 to 15 illustrate a last embodiment for which the damping device 2 is placed on the technical structure 17 of the ski 1, but under the decor layer 18 of this ski.
  • the shock absorber 2 then forms a visible overhang 19 on the ski, which is advantageous because of its distance from the neutral fiber.
  • visco-elastic layer 16 is seen on the edge of the ski, above the edge 20, as shown in Figure 15, which is interesting from a commercial point of view, the user appreciating to visualize the shock absorbers that we praise him.
  • the damping device could also, while being placed just under the decor layer 18 as in FIG. 13, be embedded in the structure 17 of the ski as in FIG. 6.
EP92420408A 1991-11-25 1992-11-10 Gleitbrett mit Vibrationsdämpfungseinrichtung Expired - Lifetime EP0549481B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9114760A FR2684011B1 (fr) 1991-11-25 1991-11-25 Planche de glisse pourvue d'un dispositif d'amortissement des vibrations.
FR9114760 1991-11-25

Publications (2)

Publication Number Publication Date
EP0549481A1 true EP0549481A1 (de) 1993-06-30
EP0549481B1 EP0549481B1 (de) 1995-03-15

Family

ID=9419473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92420408A Expired - Lifetime EP0549481B1 (de) 1991-11-25 1992-11-10 Gleitbrett mit Vibrationsdämpfungseinrichtung

Country Status (6)

Country Link
US (1) US5333889A (de)
EP (1) EP0549481B1 (de)
JP (1) JP2601035Y2 (de)
AT (1) ATE119796T1 (de)
DE (1) DE69201722T2 (de)
FR (1) FR2684011B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2711540A1 (fr) * 1993-10-28 1995-05-05 Rossignol Sa Ski.
FR2729086A1 (fr) * 1995-01-11 1996-07-12 Rossignol Sa Surf de neige equipe d'un dispositif d'amortissement des vibrations
EP0755703A1 (de) * 1995-07-26 1997-01-29 Skis Rossignol S.A. Gleitbrett mit Plattform zur Aufnahme und Erhöhung der Skibunding

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698012B1 (fr) * 1992-11-19 1994-12-16 Rossignol Sa Structure de ski.
FR2702387B1 (fr) * 1993-03-11 1995-04-28 Rossignol Sa Plaque pour le montage sur un ski alpin, d'une fixation pour chaussure.
FR2703596B1 (fr) * 1993-04-08 1995-07-07 Salomon Sa Planche de glisse notamment ski pour la pratique du ski alpin.
FR2706741B1 (de) * 1993-06-23 1995-10-20 Rossignol Sa
FR2709673B1 (fr) * 1993-09-07 1995-10-06 Rossignol Sa Procédé pour la fabrication d'un ski en forme.
FR2734492B1 (fr) * 1995-05-22 1997-06-27 Rossignol Sa Planche de glisse sur neige comportant un dispositif pour le montage d'une fixation d'une chaussure
FR2734489B1 (fr) * 1995-05-22 1997-07-04 Rossignol Sa Planche de glisse sur neige "a demi-coque", pourvue de chants de support de la coque
US5775715A (en) * 1995-08-01 1998-07-07 K-2 Corporation Piezoelectric damper for a board such as a snow ski or snowboard
US6095547A (en) * 1995-08-01 2000-08-01 K-2 Corporation Active piezoelectric damper for a snow ski or snowboard
AT405139B (de) * 1995-08-14 1999-05-25 Atomic Austria Gmbh Gleitgerät
FR2739300B1 (fr) * 1995-09-29 1997-11-21 Rossignol Sa Ski de fond, notamment pour la pratique du skating
FR2742344B1 (fr) * 1995-12-19 1998-01-16 Rossignol Sa Planche de glisse equipee d'un dispositif destine a modifier la raideur de la planche sous l'effet d'une poussee verticale donnee par l'utilisateur
US6267402B1 (en) * 1999-03-30 2001-07-31 Nitinol Technologies, Inc. Nitinol ski structures
FR2820984B1 (fr) * 2001-02-20 2003-06-06 Rossignol Sa Plateforme de rehaussement de la fixation d'une planche de glisse, et planche de glisse equipee d'une telle plateforme
FR2820982B1 (fr) 2001-02-20 2003-03-28 Rossignol Sa Planche de glisse
FR2820983B1 (fr) 2001-02-20 2004-04-16 Rossignol Sa Planche de glisse
FR2834906B1 (fr) * 2002-01-24 2004-04-02 Rossignol Sa Perfectionnement pour planche de glisse sur neige
DE10254471A1 (de) 2002-11-21 2004-06-03 Madsus A/S Ski mit Bindungs-Montagehilfe, Verfahren zur Herstellung eines solchen Ski sowie entsprechende Montagehilfe
FR2854333B1 (fr) * 2003-04-30 2005-07-22 Rossignol Sa Perfectionnement pour planche de glisse sur neige
CN101111293B (zh) * 2005-01-10 2011-04-27 罗特费尔拉公司 包括固定器-安装辅具的滑雪板或类似滑雪装置
AT504800B1 (de) * 2007-02-02 2010-05-15 Atomic Austria Gmbh Schi oder snowboard mit einem plattenartigen kraftübertragungselement
FR2912065B1 (fr) * 2007-02-02 2009-03-06 Skis Rossignol Soc Par Actions Planche de glisse sur neige
KR101601850B1 (ko) * 2014-10-08 2016-03-09 동아대학교 산학협력단 이중 볼 밸브

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762734A (en) * 1970-07-01 1973-10-02 R Vogel Skis
FR2237653A1 (de) * 1973-07-18 1975-02-14 Olin Corp
FR2575393A1 (fr) * 1984-12-27 1986-07-04 Rossignol Sa Ski de neige
FR2615404A1 (fr) * 1987-05-22 1988-11-25 Salomon Sa Ski a amortissement reparti
FR2616340A1 (fr) * 1987-06-12 1988-12-16 Salomon Sa Ski a neige

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Publication number Priority date Publication date Assignee Title
US3537717A (en) * 1968-11-29 1970-11-03 Minnesota Mining & Mfg Damped ski and method of making
US3901522A (en) * 1973-07-18 1975-08-26 Olin Corp Vibration damped ski
FR2437225A1 (fr) * 1978-09-28 1980-04-25 Bekaert Sa Nv Ski perfectionne
FR2503570A2 (fr) * 1980-02-21 1982-10-15 Rossignol Sa Ski
FR2503569A1 (fr) * 1981-04-09 1982-10-15 Rossignol Sa Ski
DE3840553A1 (de) * 1988-12-01 1990-06-07 Blizzard Gmbh Ski mit einem daempfungselement
EP0451132B1 (de) * 1990-04-05 1994-07-27 Head Sport Aktiengesellschaft Ski
FR2664823A1 (fr) * 1990-07-19 1992-01-24 Rossignol Sa Ski alpin.
FR2665081B1 (fr) * 1990-07-30 1992-11-06 Rossignol Sa Surf de neige a caracteristiques asymetriques.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762734A (en) * 1970-07-01 1973-10-02 R Vogel Skis
FR2237653A1 (de) * 1973-07-18 1975-02-14 Olin Corp
FR2575393A1 (fr) * 1984-12-27 1986-07-04 Rossignol Sa Ski de neige
FR2615404A1 (fr) * 1987-05-22 1988-11-25 Salomon Sa Ski a amortissement reparti
FR2616340A1 (fr) * 1987-06-12 1988-12-16 Salomon Sa Ski a neige

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2711540A1 (fr) * 1993-10-28 1995-05-05 Rossignol Sa Ski.
FR2729086A1 (fr) * 1995-01-11 1996-07-12 Rossignol Sa Surf de neige equipe d'un dispositif d'amortissement des vibrations
EP0755703A1 (de) * 1995-07-26 1997-01-29 Skis Rossignol S.A. Gleitbrett mit Plattform zur Aufnahme und Erhöhung der Skibunding
FR2737129A1 (fr) * 1995-07-26 1997-01-31 Rossignol Sa Planche de glisse comportant une plateforme de reception et de surelevation des fixations de la chaussure

Also Published As

Publication number Publication date
JPH063377U (ja) 1994-01-18
FR2684011A1 (fr) 1993-05-28
ATE119796T1 (de) 1995-04-15
JP2601035Y2 (ja) 1999-11-02
EP0549481B1 (de) 1995-03-15
DE69201722T2 (de) 1995-10-19
DE69201722D1 (de) 1995-04-20
FR2684011B1 (fr) 1994-01-07
US5333889A (en) 1994-08-02

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