EP0774283B1 - Frame for skate and method for making same - Google Patents

Frame for skate and method for making same Download PDF

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Publication number
EP0774283B1
EP0774283B1 EP96115121A EP96115121A EP0774283B1 EP 0774283 B1 EP0774283 B1 EP 0774283B1 EP 96115121 A EP96115121 A EP 96115121A EP 96115121 A EP96115121 A EP 96115121A EP 0774283 B1 EP0774283 B1 EP 0774283B1
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EP
European Patent Office
Prior art keywords
chassis
rib
flange
manufacturing
flanges
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.)
Expired - Lifetime
Application number
EP96115121A
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German (de)
French (fr)
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EP0774283B2 (en
EP0774283A1 (en
Inventor
Louis Benoit
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.)
Salomon SAS
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Salomon SAS
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Application filed by Salomon SAS filed Critical Salomon SAS
Priority to EP02000865A priority Critical patent/EP1199091A1/en
Priority to DE29623927U priority patent/DE29623927U1/en
Publication of EP0774283A1 publication Critical patent/EP0774283A1/en
Application granted granted Critical
Publication of EP0774283B1 publication Critical patent/EP0774283B1/en
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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
    • A63C1/00—Skates
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/04—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs
    • A63C17/06—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type
    • A63C17/068—Production or mounting thereof
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C2203/00—Special features of skates, skis, roller-skates, snowboards and courts
    • A63C2203/42—Details of chassis of ice or roller skates, of decks of skateboards
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material

Definitions

  • the present invention relates to a frame for a sliding sport article of the type roller skate, ice skate and a method of manufacturing such a frame.
  • Such elements must ensure the connection between the sliding member (s) properly said, namely ice skate blade or wheels, casters, and the foot of the user.
  • the chassis therefore generally consist of a bearing surface capable of receiving the athlete's shoe and one or two lateral flanges intended to receive the wheels, casters or the skate blade.
  • chassis manufacturing techniques do not allow to meet all these requirements, while maintaining a reasonable manufacturing cost.
  • the oldest manufacturing technique consists in manufacturing such frame from a folded sheet, U-shaped, as shown for example in DE 10 33 569.
  • Patent application EP-A-0 043 250 describes a U-shaped chassis with lateral flanges comprising fixing means for the sliding members.
  • the shape of the frame is cut from a metal sidewall.
  • the side flanges have a fairly narrow shape and holes for fixing the protective means are provided in the flanges.
  • a fairly thick sheet of metal must be provided, which increases the weight of the frame.
  • FR 943 511 describes a Y-shaped chassis, its rigidity being due to the bending of the flanges and incidentally to material returns provided on the periphery of the different cuts made there.
  • the object of the present invention is to remedy these drawbacks and to provide an improved frame for a sliding sports article and a manufacturing method of such a chassis which makes it possible to solve the various problems set out above and which in particular makes it possible to reconcile mechanical strength characteristics, adaptability, flexibility of realization, lightness and low cost of manufacturing.
  • a U-shaped chassis for articles of slides comprising at least one bearing surface capable of receiving a shoe and two lateral flanges comprising means for fixing the member (s) of slides, said chassis comprising at least one stiffening rib produced on at least one of the flanges by stamping.
  • the rib is elongated in one direction longitudinal of the chassis in a region between at least two means of fixation.
  • the fact of stiffening the chassis using ribs by stamping allows, at equal weight compared to a chassis simply obtained by folding, an increase important characteristics of rigidity and resistance to deformation partly because of the presence of such ribs but also partly localized work hardening of material obtained at said ribs linked to method of obtaining by stamping.
  • each rib extends substantially over the entire length of the chassis flange, or only over a limited central area of each flange, or even at the ends of each flange.
  • the chassis according to the invention is produced at from a metal sheet and is generally in the form of two flanges side 2 connected to each other by two platforms 3, 4 giving the whole a substantially U-shaped cross section.
  • Each of the platforms 3, 4 constitutes a bearing surface capable of receiving the athlete's shoe, the latter (not shown in the drawing) being fixed by any means known per se and in particular glue, rivets, screws, etc., but which can be also removably attached by non-permanent connecting means.
  • platforms 3, 4, are distinct and separate one on the other by a cutout 5, and located at different levels in height, the platform 4 being lower than platform 3, to take account of the position natural, slightly raised heel, sporty.
  • Each flange 2 has an elongated shape and slightly curved in an arc in the longitudinal direction.
  • holes 6 are provided for fixing of casters or, as the case may be, of a skate blade.
  • Each hole 6 is made in a cylindrical boss 7 which can be obtained by stamping.
  • the holes 6 located in correspondence in the two flanges 2 are coaxial.
  • Each flange 2 also has a stamped rib 8 extending substantially over the entire length of said flange 2, above the fixing holes 6 and generally arched.
  • each rib 8 has a substantially constant thickness corresponding to that of the sheet metal constituting the flanges 2 and each of the platforms 3, 4, and has a hollow shape, curved outwards, this hollow shape and constant thickness being characteristic of a shape obtained by stamping.
  • Each rib 8 also preferably follows the contour of the flanges 1, 2, on which it is stamped and therefore has in this case an elongated shape and also slightly curved in the longitudinal direction.
  • Such a stamped rib 8 gives the flange on which it is made a significant increase in moment of inertia and resistance to deformation both in the longitudinal and vertical direction, this increase being linked not only to the presence of each rib 8 and to its shape but also to work hardening of the material at the rib during the operation stamping.
  • Such a concept of construction and manufacturing practically allows to divide by two the thickness and therefore the weight of the sheet metal plate used to make the chassis compared to a folded, molded or profiled chassis, while retaining or even increasing mechanical characteristics.
  • the chassis will be produced from a laminated sheet whose fibers are oriented in the longitudinal direction of the chassis.
  • Such a characteristic also makes it possible to increase the strength qualities of the chassis by longitudinal direction, in particular with respect to an injected alloy chassis or cast in which there is no fiber formation.
  • the cutout 9, of oval shape and disposed centrally below of the rib 8 makes it possible to reduce the bending stiffness of each flange 2 in the central area of the chassis and also in combination with cutout 5 centrally arranged, also reduces the bending stiffness of the entire chassis in this area.
  • each chassis can consist of two section flanges general transverse "L” shaped and connected together by the small branch of each "L".
  • chassis according to the invention offer great possibilities for varying the moment of inertia of the chassis along the longitudinal axis thereof, by predicting the ribs, cutouts or suitable side heights, in order to obtain a deformation of the chassis and a behavior optimum skate depending on the type of practice desired.
  • chassis described with reference to Figures 1 to 3 offers almost uniform rigidity along its entire length while the other two examples of chassis shown Figures 4 to 6 and 7 to 10 provide different behaviors.
  • the chassis 10 mounted in FIGS. 4 to 6 comprises, like the chassis 1, two lateral flanges 12 but a single platform 13 extending over its entire length.
  • the chassis 10 also has a shape clearly curved in an arc.
  • Each flange 12 has at each end a cutout 15 and a narrowing perimeter 14, giving it a certain flexibility and a low moment of inertia in these areas.
  • each flange 12 is provided in its median zone with two ribs stamped 18, 19 superimposed.
  • Such a chassis therefore has a very high rigidity in the center, in the area of ribs 18, 19, and relatively flexible ends.
  • the chassis 20 shown in FIGS. 7 to 10 comprises, like the chassis 10, two lateral flanges 22 and a single platform 13 extending over its entire length.
  • Such a chassis will therefore be very rigid at the rear, very flexible at the center and moderately rigid at the front.
  • FIG. 11 to 13 illustrate yet other embodiments of a chassis.
  • each lateral flange 32 of the chassis 30 is stamped over its entire surface and therefore constitutes a wide and single rib 38 slightly curved outwards.
  • Such a chassis therefore has characteristics of torsional rigidity and particularly homogeneous bending over its entire length, the only areas more flexible being defined at the front and rear by notches 34.
  • FIG. 13 illustrates yet another example of cross stamping of lateral flanges 42 of a chassis 40, in which each flange is pressed one first time outward, then a second time inward, defining thus two outer "ribs" 48 and an inner middle rib 49.
  • the present invention is not limited to the exemplary embodiments shown above. It can be applied to any chassis for sporting goods in front meet the same requirements.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Pyrane Compounds (AREA)
  • Body Structure For Vehicles (AREA)
  • Forging (AREA)

Abstract

The frame (1), having a rectangular inverted U-shaped crosssection with one or more thrust surfaces (3, 4) to receive the sole of a boot, and one or more side flanges (2), is made from a cut-out sheet metal shape, stamped to form curved reinforcing ribs (8) in the flange(s), and then folded. The flanges have fixing holes (6) for blade, wheels or rollers, and the frame can be made from a number of components joined by screws, rivets or welding.

Description

La présente invention concerne un châssis pour article de sport de glisse de type patin à roulettes, patin à glace et un procédé de fabrication d'un tel châssis.The present invention relates to a frame for a sliding sport article of the type roller skate, ice skate and a method of manufacturing such a frame.

De tels éléments doivent assurer la liaison entre le ou les organes de glisse proprement dit, à savoir lame de patin à glace ou roues, roulettes, et le pied de l'utilisateur.Such elements must ensure the connection between the sliding member (s) properly said, namely ice skate blade or wheels, casters, and the foot of the user.

Les châssis sont donc généralement constitués d'une surface d'appui apte à recevoir la chaussure du sportif et d'un ou deux flasques latéraux destinés a recevoir les roues, roulettes ou la lame du patin.The chassis therefore generally consist of a bearing surface capable of receiving the athlete's shoe and one or two lateral flanges intended to receive the wheels, casters or the skate blade.

Ils doivent par ailleurs présenter des caractéristiques de résistance mécanique importantes tout en étant le plus légers possible afin de ne pas entraíner d'efforts trop importants de la part du sportif.They must also have significant mechanical strength characteristics while being as light as possible so as not to cause too much effort important from the athlete.

Par ailleurs, la technicité croissante de ces articles de sport de glisse, notamment dans le cas des patins à roues en ligne, augmente encore les exigences, contradictoires, auxquelles doivent satisfaire les châssis de patin, et à savoir:

  • une résistance mécanique et stabilité accrue, notamment pour les patins de vitesse mais également pour le patins dits de «Free ride», «Free style» ou hockey,
  • une certaine flexibilité, notamment dans certaines zones du patin pour permettre une adaptation de la forme du patin à la trajectoire effectuée, notamment dans les courbes à grande vitesse,
  • des formes variées et originales pour répondre aux exigences naissantes et changeantes de la mode,
  • un coût de fabrication le plus bas possible.
In addition, the increasing technicality of these sliding sports articles, in particular in the case of inline skates, further increases the contradictory requirements which the skate frames must satisfy, and namely:
  • increased mechanical resistance and stability, especially for speed skates but also for so-called "Free ride", "Free style" or hockey skates,
  • a certain flexibility, in particular in certain areas of the skate to allow adaptation of the shape of the skate to the trajectory carried out, in particular in high-speed curves,
  • varied and original shapes to meet the emerging and changing requirements of fashion,
  • the lowest possible manufacturing cost.

Les techniques de fabrication de châssis connues actuellement ne permettent pas de satisfaire à toutes ces exigence, tout en conservant un coût de fabrication raisonnable.Currently known chassis manufacturing techniques do not allow to meet all these requirements, while maintaining a reasonable manufacturing cost.

En effet, la technique de fabrication la plus ancienne consiste à fabriquer de tels châssis à partir d'une tôle pliée, en forme de U, comme montré par exemple dans le DE 10 33 569.Indeed, the oldest manufacturing technique consists in manufacturing such frame from a folded sheet, U-shaped, as shown for example in DE 10 33 569.

Un tel principe de fabrication, certes peu coûteux, ne permet cependant pas d'obtenir des formes très variées, ni des châssis de grande résistance mécanique sauf à augmenter de façon importante l'épaisseur de la tôle et donc son poids.Such a manufacturing principle, admittedly inexpensive, does not however allow to obtain very varied forms, nor chassis of great mechanical resistance except to significantly increase the thickness of the sheet and therefore its weight.

La demande de brevet EP-A-0 043 250 décrit un châssis en forme de U avec des flasques latéraux comportant des moyens de fixation pour les organes de glisse. La forme du châssis est découpée dans un flanc de métal. Les flasques latéraux ont une forme assez étroite et des trous pour la fixation des moyens de protection sont prévus dans les flasques. Pour éviter une déformation longitudinale du châssis, il faut prévoir une tôle de métal assez épaisse, ce qui augmente le poids du châssis.Patent application EP-A-0 043 250 describes a U-shaped chassis with lateral flanges comprising fixing means for the sliding members. The shape of the frame is cut from a metal sidewall. The side flanges have a fairly narrow shape and holes for fixing the protective means are provided in the flanges. To avoid longitudinal deformation of the chassis, a fairly thick sheet of metal must be provided, which increases the weight of the frame.

Afin d'améliorer la résistance mécanique, on a d'abord essayé d'abandonner la forme en U du châssis pour la remplacer par des formes en T ou Y.In order to improve the mechanical resistance, we first tried to abandon the U shape of the frame to replace it with T or Y shapes.

FR 943 511 décrit un châssis en forme de Y, sa rigidité étant due au cintrage des flasques et accessoirement à des retours de matière ménagés en périphérie des différentes découpes qui y sont faites. FR 943 511 describes a Y-shaped chassis, its rigidity being due to the bending of the flanges and incidentally to material returns provided on the periphery of the different cuts made there.

US 4,273,345 décrit, quant à lui, un châssis en forme de T dans lequel, pour améliorer la rigidité des flancs, on les monte dos à dos dans tous les endroits où cela est possible.US 4,273,345 describes, meanwhile, a T-shaped chassis in which, to improve the stiffness of the sides, we mount them back to back in all the places where is possible.

Ces réalisations qui sont complexes à fabriquer ne résolvent que partiellement le problème de rigidité et ne répondent pas aux exigences actuelles de fabrication du châssis, tant au point de vue mécanique qu'au point de l'esthétique.These realizations which are complex to manufacture only partially solve the stiffness problem and do not meet the current manufacturing requirements of the chassis, both mechanically and aesthetically.

Une autre technique couramment utilisée consiste à réaliser les châssis par moulage à partir de matériau synthétique ou encore métallique. Le moulage offre l'avantage de permettre des formes assez variées, mais présente par ailleurs de nombreux inconvénients :

  • coûts des moules,
  • choix limité de matériaux pouvant être moulés,
  • faibles caractéristiques de résistance mécanique de ces matériaux de moulage, même lorsqu'il s'agit de matériaux métalliques,
  • précision insuffisante du moulage obligeant à des reprises d'usinage notamment en ce qui concerne l'alignement des trous de fixation des roues ou de la lame du patin pour un châssis à deux flasques.
Another commonly used technique consists in making the frames by molding from synthetic or even metallic material. Molding offers the advantage of allowing quite varied shapes, but also has many disadvantages:
  • mold costs,
  • limited choice of materials that can be molded,
  • low mechanical strength characteristics of these molding materials, even in the case of metallic materials,
  • Insufficient precision of the molding, which requires machining to be repeated, in particular as regards the alignment of the fixing holes of the wheels or of the skate blade for a chassis with two flanges.

On connaít également des châssis réalisés en fibres composites. De tels châssis peuvent effectivement être réalisés dans quasiment toutes les formes possibles mais ils sont d'une fabrication extrêmement coûteuse et difficile à industrialiser. Par ailleurs de tels châssis sont certes extrêmement rigides mais manquent de souplesse et sont donc fragiles et peu "confortables".We also know frames made of composite fibers. Such chassis can actually be made in almost any shape but they are extremely expensive to manufacture and difficult to industrialize. Furthermore, such chassis are certainly extremely rigid but lack flexibility and are therefore fragile and uncomfortable.

Enfin, il a été proposé par le US 5 388 846 de réaliser un châssis pour patin à glace ou à roulettes à partir d'une barre profilée métallique dont la section transversale correspond à la section générale souhaitée pour le châssis, la forme finale du châssis étant obtenue après usinage avec enlèvement de matière. Finally, it has been proposed by US 5,388,846 to produce a skate frame for glass or on casters from a metal profiled bar whose cross section corresponds to the general section desired for the chassis, the final shape of the chassis being obtained after machining with removal of material.

Un tel procédé de fabrication est encore ici très coûteux, du fait du temps d'usinage nécessaire et de la quantité de matière devant être enlevée. Il ne permet pas non plus une grande liberté au niveau de la forme ou du profil du châssis.Such a manufacturing process is still very expensive here, due to the time. necessary machining and the amount of material to be removed. It only allows not much freedom in terms of shape or profile of the chassis.

Le but de la présente invention est de remédier à ces inconvénients et de fournir un châssis amélioré pour article de sport de glisse et un procédé de fabrication d'un tel châssis qui permette de résoudre les différents problème énoncés ci-avant et qui permette notamment de concilier des caractéristiques de résistance mécanique, d'adaptabilité, de souplesse de réalisation, de légèreté et de faible coût de fabrication.The object of the present invention is to remedy these drawbacks and to provide an improved frame for a sliding sports article and a manufacturing method of such a chassis which makes it possible to solve the various problems set out above and which in particular makes it possible to reconcile mechanical strength characteristics, adaptability, flexibility of realization, lightness and low cost of manufacturing.

Ce but est atteint dans le procédé de fabrication selon l'invention par le fait qu'il s'agit d'un châssis en forme de U pour article des sport de glisse et du type comportant au moins une surface d'appui apte à recevoir une chaussure et deux flasques latéraux comportant des moyens de fixation du ou des organes de glisse, et en ce qu'il comprend les étapes consistant à

  • découper dans un flanc de métal une forme correspondant sensiblement à la forme développée d'au moins une partie du châssis
  • à réaliser par emboutissage dans ladite partie du châssis au moins une nervure de rigidification allongée dans une direction longitudinale du châssis dans une région entre au moins deux moyens de fixation.
This object is achieved in the manufacturing method according to the invention by the fact that it is a U-shaped chassis for sliding sports articles and of the type comprising at least one bearing surface capable of receiving a shoe and two lateral flanges comprising means for fixing the sliding member or members, and in that it comprises the steps consisting in:
  • cut in a metal side a shape corresponding substantially to the developed shape of at least a part of the frame
  • to be produced by stamping in said part of the chassis at least one stiffening rib elongated in a longitudinal direction of the chassis in a region between at least two fixing means.

Ce but est également atteint grâce à un châssis en forme de U pour article de glisse comportant au moins une surface d'appui apte à recevoir une chaussure et deux flasques latéraux comportant des moyens de fixation du ou des organes de glisse, ledit châssis comportant au moins une nervure de rigidification réalisée sur au moins un des flasques par emboutissage. La nervure est allongée dans une direction longitudinale du châssis dans une région entre au moins deux moyens de fixation. This goal is also achieved thanks to a U-shaped chassis for articles of slides comprising at least one bearing surface capable of receiving a shoe and two lateral flanges comprising means for fixing the member (s) of slides, said chassis comprising at least one stiffening rib produced on at least one of the flanges by stamping. The rib is elongated in one direction longitudinal of the chassis in a region between at least two means of fixation.

En effet, le fait de rigidifier le châssis à l'aide de nervures par emboutissage permet, à poids égal par rapport à un châssis simplement obtenu par pliage, une augmentation importante des caractéristiques de rigidité et de résistance à la déformation du fait d'une part de la présence de telles nervures mais également du fait de l'écrouissage localisé de matériau obtenu au niveau des dites nervures lié au mode d'obtention par emboutissage.Indeed, the fact of stiffening the chassis using ribs by stamping allows, at equal weight compared to a chassis simply obtained by folding, an increase important characteristics of rigidity and resistance to deformation partly because of the presence of such ribs but also partly localized work hardening of material obtained at said ribs linked to method of obtaining by stamping.

En fonction du résultat recherché on peut prévoir que chaque nervure s'étende sensiblement sur toute la longueur du flasque du châssis, ou uniquement sur une zone centrale limitée de chaque flasque, ou encore au niveau des extrémités de chaque flasque.Depending on the desired result, we can predict that each rib extends substantially over the entire length of the chassis flange, or only over a limited central area of each flange, or even at the ends of each flange.

De tout façon, l'invention sera mieux comprise et d'autres caractéristiques de celle-ci seront mises en évidence à l'aide de la description qui suit en référence au dessin schématique annexé représentant à titre d'exemples non limitatifs, plusieurs formes de réalisation de châssis, et dans lequel :

  • la figure 1 est une vue de côté d'un châssis selon un premier mode de réalisation,
  • la figure 2 est une vue en coupe selon II-II de la figure 1,
  • la figure 3 est une vue en coupe selon III-III de la figure 1,
  • la figure 4 est une vue de côté d'un châssis selon un second mode de réalisation,
  • la figure 5 est une vue en coupe selon V-V de la figure 4,
  • la figure 6 est une vue en coupe selon VI-VI de la figure 4,
  • la figure 7 est une vue de côté d'un châssis selon un troisième mode de réalisation,
  • la figure 8 est une vue en coupe selon VIII-VIII de la figure 7,
  • la figure 9 est une vue en coupe selon IX-IX de la figure 7,
  • la figure 10 est une vue en coupe selon X-X de la figure 7,
  • la figure 11 est une vue de côté d'un châssis selon un quatrième mode de réalisation,
  • la figure 12 est une vue en coupe selon XII-XII de la figure 11,
  • la figure 13 est une vue similaire à la figure 12 illustrant encore un autre mode de réalisation.
In any case, the invention will be better understood and other characteristics thereof will be highlighted with the aid of the description which follows with reference to the appended schematic drawing representing, by way of nonlimiting examples, several forms of chassis production, and in which:
  • FIG. 1 is a side view of a chassis according to a first embodiment,
  • FIG. 2 is a sectional view along II-II of FIG. 1,
  • FIG. 3 is a sectional view along III-III of FIG. 1,
  • FIG. 4 is a side view of a chassis according to a second embodiment,
  • FIG. 5 is a sectional view along VV of FIG. 4,
  • FIG. 6 is a sectional view along VI-VI of FIG. 4,
  • FIG. 7 is a side view of a chassis according to a third embodiment,
  • FIG. 8 is a sectional view along VIII-VIII of FIG. 7,
  • FIG. 9 is a sectional view along IX-IX of FIG. 7,
  • FIG. 10 is a sectional view along XX of FIG. 7,
  • FIG. 11 is a side view of a chassis according to a fourth embodiment,
  • FIG. 12 is a sectional view along XII-XII of FIG. 11,
  • Figure 13 is a view similar to Figure 12 illustrating yet another embodiment.

Ainsi que le montrent les figures 1 à 3, le châssis selon l'invention est réalisé à partir d'une tôle métallique et se présente globalement sous la forme de deux flasques latéraux 2 reliés l'un à l'autre par deux plates-formes 3, 4 conférant à l'ensemble une section transversale sensiblement en forme de U.As shown in Figures 1 to 3, the chassis according to the invention is produced at from a metal sheet and is generally in the form of two flanges side 2 connected to each other by two platforms 3, 4 giving the whole a substantially U-shaped cross section.

Chacune des plates-formes 3, 4, constitue une surface d'appui apte à recevoir la chaussure du sportif, cette dernière (non représentée sur le dessin) étant fixée par tout moyen connu en soi et notamment colle, rivets, vis, etc..., mais pouvant être également fixée de façon amovible par des moyens de liaison non permanente.Each of the platforms 3, 4 constitutes a bearing surface capable of receiving the athlete's shoe, the latter (not shown in the drawing) being fixed by any means known per se and in particular glue, rivets, screws, etc., but which can be also removably attached by non-permanent connecting means.

On notera également que les plates-formes 3, 4, sont distinctes et séparées l'une de l'autre par une découpe 5, et situées à des niveaux différents en hauteur, la plate-forme 4 étant plus basse que la plate-forme 3, pour tenir compte de la position naturelle, talon légèrement surélevé, d'un sportif.It will also be noted that the platforms 3, 4, are distinct and separate one on the other by a cutout 5, and located at different levels in height, the platform 4 being lower than platform 3, to take account of the position natural, slightly raised heel, sporty.

Chaque flasque 2 présente une forme allongée et légèrement cintrée en arc de cercle dans la direction longitudinale.Each flange 2 has an elongated shape and slightly curved in an arc in the longitudinal direction.

A l'extrémité inférieure de chaque flasque, sont prévus des trous 6 pour la fixation de roulettes ou selon le cas, d'une lame de patin.At the lower end of each flange, holes 6 are provided for fixing of casters or, as the case may be, of a skate blade.

Chaque trou 6 est réalisé dans un bossage cylindrique 7 pouvant être obtenu par matriçage. Les trous 6 situés en correspondance dans les deux flasques 2 sont coaxiaux. Each hole 6 is made in a cylindrical boss 7 which can be obtained by stamping. The holes 6 located in correspondence in the two flanges 2 are coaxial.

Chaque flasque 2 présente par ailleurs une nervure emboutie 8 s'étendant sensiblement sur toute la longueur dudit flasque 2, au dessus des trous de fixation 6 et d'allure générale arquée.Each flange 2 also has a stamped rib 8 extending substantially over the entire length of said flange 2, above the fixing holes 6 and generally arched.

Comme le montrent plus particulièrement les figures 2 et 3, chaque nervure 8 a une épaisseur sensiblement constante correspondant à celle de la tôle constituant les flasques 2 et chacune des plates-formes 3, 4, et présente une forme en creux, bombée vers l'extérieur, cette forme en creux et l'épaisseur constante étant caractéristiques d'une forme obtenue par emboutissage.As shown more particularly in Figures 2 and 3, each rib 8 has a substantially constant thickness corresponding to that of the sheet metal constituting the flanges 2 and each of the platforms 3, 4, and has a hollow shape, curved outwards, this hollow shape and constant thickness being characteristic of a shape obtained by stamping.

Chaque nervure 8 suit par ailleurs de préférence le contour des flasques 1, 2, sur lequel elle est emboutie et présente donc en l'occurrence une forme allongée et également légèrement cintrée en direction longitudinale.Each rib 8 also preferably follows the contour of the flanges 1, 2, on which it is stamped and therefore has in this case an elongated shape and also slightly curved in the longitudinal direction.

Une telle nervure emboutie 8 confère au flasque sur lequel elle est réalisée une augmentation importante du moment d'inertie et de la résistance à la déformation aussi bien en direction longitudinale que verticale, cette augmentation étant liée non seulement à la présence de chaque nervure 8 et à sa forme mais également à l'écrouissage du matériau au niveau de la nervure lors de l'opération d'emboutissage.Such a stamped rib 8 gives the flange on which it is made a significant increase in moment of inertia and resistance to deformation both in the longitudinal and vertical direction, this increase being linked not only to the presence of each rib 8 and to its shape but also to work hardening of the material at the rib during the operation stamping.

Un tel concept de construction et de fabrication permet pratiquement de diviser par deux l'épaisseur et donc le poids de la plaque de tôle utilisée pour réaliser le châssis par rapport à un châssis plié, moulé ou profilé, tout en conservant voire en augmentant les caractéristiques mécaniques.Such a concept of construction and manufacturing practically allows to divide by two the thickness and therefore the weight of the sheet metal plate used to make the chassis compared to a folded, molded or profiled chassis, while retaining or even increasing mechanical characteristics.

Par ce procédé, on obtient donc un châssis extrêmement léger, résistant et peu coûteux.By this process, we obtain an extremely light, resistant and little chassis expensive.

Avantageusement, le châssis sera réalisé à partir d'une tôle laminée dont les fibres se trouvent orientées selon la direction longitudinale du châssis. Une telle caractéristique permet également d'augmenter les qualités de résistance du châssis en direction longitudinale, notamment par rapport à un châssis en alliage injecté ou coulé dans lequel il n'y a pas de formation de fibres.Advantageously, the chassis will be produced from a laminated sheet whose fibers are oriented in the longitudinal direction of the chassis. Such a characteristic also makes it possible to increase the strength qualities of the chassis by longitudinal direction, in particular with respect to an injected alloy chassis or cast in which there is no fiber formation.

Par ailleurs, il est possible de modifier/moduler le moment d'inertie du châssis par la prévision de découpes telles que 5, 9, appropriées.Furthermore, it is possible to modify / modulate the moment of inertia of the chassis by predicting cuts such as 5, 9, appropriate.

Dans le cas présent, la découpe 9, de forme ovale et disposée centralement en dessous de la nervure 8, permet de diminuer la raideur en flexion de chaque flasque 2 dans la zone centrale du châssis et, en combinaison avec la découpe 5 également disposée centralement, permet également de diminuer la raideur en flexion de l'ensemble du châssis dans cette zone.In the present case, the cutout 9, of oval shape and disposed centrally below of the rib 8, makes it possible to reduce the bending stiffness of each flange 2 in the central area of the chassis and also in combination with cutout 5 centrally arranged, also reduces the bending stiffness of the entire chassis in this area.

Un tel châssis peut être obtenu très simplement et de façon monobloc à partir d'un flanc métallique par la succession d'étapes suivantes :

  • tout d'abord le flanc est prédécoupé à une forme correspondant à la forme développée du châssis avec une surface augmentée au niveau de la zone de chaque nervure pour tenir compte du phénomène de retrait de matière au moment de l'emboutissage,
  • au cours de cette première opération, toutes les découpes telles que 5 et 9 sont également réalisées,
  • ensuite les deux nervures 8 des deux flaques 1, 2 sont réalisées par emboutissage,
  • puis les trous 6 sont réalisés par filage et sont éventuellement taraudés, après une opération préalable de matriçage des bossages 7,
  • et enfin la tôle est pliée en U.
Such a chassis can be obtained very simply and in a single piece from a metal sidewall by the following succession of steps:
  • first of all, the flank is precut to a shape corresponding to the developed shape of the frame with an increased surface at the level of the zone of each rib to take account of the phenomenon of shrinkage of material at the time of stamping,
  • during this first operation, all the cuts such as 5 and 9 are also made,
  • then the two ribs 8 of the two puddles 1, 2 are produced by stamping,
  • then the holes 6 are produced by spinning and are optionally tapped, after a prior operation of stamping the bosses 7,
  • and finally the sheet is folded into a U.

Bien entendu, la suite d'opérations décrite ci-avant n'est applicable que si le châssis est réalisé en une seule pièce à partir d'un même flanc métallique. Il peut également être obtenu en plusieurs parties assemblées par tous moyens connus en soi tels que vis, rivet, soudures,... etc.Of course, the sequence of operations described above is only applicable if the chassis is made in one piece from the same metal sidewall. It can also be obtained in several parts assembled by any means known per se such as screws, rivets, welds, etc.

Plus particulièrement, chaque châssis peut être constitué de deux flasques de section transversale générale en forme de « L » et reliés ensemble par la petite branche de chaque « L ».More particularly, each chassis can consist of two section flanges general transverse "L" shaped and connected together by the small branch of each "L".

Par rapport à un châssis aluminium en alliage obtenu par injection au moulage, une telle technique de fabrication par emboutissage, et éventuellement matriçage, pliage, est beaucoup plus précise, ne nécessite pas d'opération d'usinage ultérieure et permet de disposer d'un choix de matériau plus important et avec des caractéristiques plus intéressantes. En effet, le nombre des matières disponibles pour l'injection ou le moulage est très limité et ces matières sont généralement cassantes et ne donnent pas lieu à la formation de fibres.Compared to an aluminum alloy chassis obtained by injection molding, such a technique of manufacturing by stamping, and optionally stamping, folding, is much more precise, does not require any subsequent machining operation and provides a greater choice of material and with more interesting features. Indeed, the number of available materials for injection or molding is very limited and these materials are generally brittle and do not result in the formation of fibers.

Par ailleurs, les techniques de moulage, injection n'étant pas assez précises, des reprises d'usinage toujours longues et coûteuses seraient nécessaires pour réaliser par exemple let trous de fixation du ou des organes de glisse.Furthermore, since molding and injection techniques are not precise enough, always long and costly rework would be necessary to achieve for example let the fixing holes of the sliding member (s).

On notera également que les qualités géométriques d'un châssis embouti sont nettement supérieures à celles d'un châssis en matière plastiques, pour lequel on est confronté du fait des retraits importants de la matière, à des phénomènes de vrillage et d'alignement des trous de fixation des roues nécessitant des opérations de reprise d'usinage.It will also be noted that the geometric qualities of a stamped chassis are significantly higher than those of a plastic chassis, for which is confronted by the fact of the significant withdrawals of the material, with phenomena of twisting and alignment of wheel fixing holes requiring operations resumption of machining.

A titre indicatif, les temps nécessaires pour produire un châssis dans les différentes techniques peuvent être évalués comme suit :

  • matière plastique   15 secondes
  • aluminium profilé + usiné   180 secondes
  • aluminium coulé   85 secondes
  • aluminium embouti   6 secondes.
As an indication, the times required to produce a chassis in the various techniques can be evaluated as follows:
  • plastic 15 seconds
  • profiled aluminum + machined 180 seconds
  • cast aluminum 85 seconds
  • stamped aluminum 6 seconds.

On constate donc le triple gain au niveau temps et coût de fabrication, caractéristiques du matériau et légèreté, réalisé en employant la technique d'emboutissage selon l'invention.There is therefore a triple gain in time and cost of manufacture, characteristics material and lightness, made using the stamping technique according to the invention.

Une autre caractéristique extrêmement avantageuse de la technique d'emboutissage réside dans le fait que les possibilités en terme de design sont supérieures à celles du profilé d'aluminium qui ne permet aucun relief ou forme sur les flancs du profilé obligatoirement plans.Another extremely advantageous feature of the technique the fact that the possibilities in terms of design are greater to those of the aluminum profile which does not allow any relief or shape on the sides of the profile must be flat.

Par ailleurs, le procédé et la construction de châssis selon l'invention offrent de grandes possibilités pour faire varier le moment d'inertie du châssis le long de l'axe longitudinal de celui-ci, par la prévision des nervurages, découpes ou encore hauteurs de flanc adaptés, afin d'obtenir une déformée du châssis et un comportement optimum du patin en fonction du type de pratique souhaitée.Furthermore, the method and the construction of chassis according to the invention offer great possibilities for varying the moment of inertia of the chassis along the longitudinal axis thereof, by predicting the ribs, cutouts or suitable side heights, in order to obtain a deformation of the chassis and a behavior optimum skate depending on the type of practice desired.

Ainsi, le châssis décrit en référence aux figures 1 à 3 offre une rigidité quasi uniforme sur toute sa longueur tandis que les deux autres exemples de châssis montrés aux figures 4 à 6 et 7 à 10 permettent d'obtenir des comportements différents.Thus, the chassis described with reference to Figures 1 to 3 offers almost uniform rigidity along its entire length while the other two examples of chassis shown Figures 4 to 6 and 7 to 10 provide different behaviors.

La châssis 10 monté aux figures 4 à 6 comporte de même que le châssis 1 deux flasques latéraux 12 mais une seule plate-forme 13 s'étendant sur toute sa longueur.The chassis 10 mounted in FIGS. 4 to 6 comprises, like the chassis 1, two lateral flanges 12 but a single platform 13 extending over its entire length.

Le châssis 10 présente par ailleurs une forme nettement courbée en arc de cercle.The chassis 10 also has a shape clearly curved in an arc.

Chaque flasque 12 présente à chaque extrémité une découpe 15 ainsi qu'un rétrécissement périmétrique 14, lui conférant une certaine souplesse et un faible moment d'inertie dans ces zones. Each flange 12 has at each end a cutout 15 and a narrowing perimeter 14, giving it a certain flexibility and a low moment of inertia in these areas.

Par contre, chaque flasque 12 est pourvu dans sa zone médiane de deux nervures embouties 18, 19 superposées.On the other hand, each flange 12 is provided in its median zone with two ribs stamped 18, 19 superimposed.

Un tel châssis présente donc une très grande rigidité au centre, dans la zone des nervures 18, 19, et des extrémités relativement souples.Such a chassis therefore has a very high rigidity in the center, in the area of ribs 18, 19, and relatively flexible ends.

La châssis 20 montré aux figures 7 à 10 comporte de même que le châssis 10 deux flasques latéraux 22 et une seule plate-forme 13 s'étendant sur toute sa longueur.The chassis 20 shown in FIGS. 7 to 10 comprises, like the chassis 10, two lateral flanges 22 and a single platform 13 extending over its entire length.

Il présente également une forme en arc de cercle. Chaque flasque 12 présente :

  • à son extrémité arrière, deux nervures superposées 28, 29,
  • dans sa zone centrale une découpe 25 ainsi qu'un rétrécissement périmétrique 24,
  • à son extrémité avant, une seule nervure 27.
It also has an arc shape. Each flange 12 has:
  • at its rear end, two superimposed ribs 28, 29,
  • in its central zone a cutout 25 as well as a perimeter narrowing 24,
  • at its front end, a single rib 27.

Un tel châssis sera donc très rigide à l'arrière, très souple au centre et moyennement rigide à l'avant.Such a chassis will therefore be very rigid at the rear, very flexible at the center and moderately rigid at the front.

Les figures 11 à 13 illustrent encore d'autres mode de réalisation d'un châssis.Figures 11 to 13 illustrate yet other embodiments of a chassis.

Dans le cas des figures 11 et 12, chaque flasque latéral 32 du châssis 30 est embouti sur toute sa surface et constitue donc une large et unique nervure 38 légèrement cintrée vers l'extérieur.In the case of FIGS. 11 and 12, each lateral flange 32 of the chassis 30 is stamped over its entire surface and therefore constitutes a wide and single rib 38 slightly curved outwards.

Un tel châssis présente donc des caractéristiques de rigidité en torsion et en flexion particulièrement homogènes sur tout sa longueur, les seules zones plus flexibles étant définies à l'avant et à l'arrière par des échancrures 34.Such a chassis therefore has characteristics of torsional rigidity and particularly homogeneous bending over its entire length, the only areas more flexible being defined at the front and rear by notches 34.

Enfin, la figure 13 illustre encore un autre exemple d'emboutissage croisé des flasques latéraux 42 d'un châssis 40, dans lequel chaque flasque est embouti une première fois vers l'extérieur, puis une seconde fois vers l'intérieur, définissant ainsi deux "nervures" extérieures 48 et une nervure médiane intérieure 49.Finally, FIG. 13 illustrates yet another example of cross stamping of lateral flanges 42 of a chassis 40, in which each flange is pressed one first time outward, then a second time inward, defining thus two outer "ribs" 48 and an inner middle rib 49.

Bien entendu, un emboutissage simple de chaque nervure intérieure 49 également possible.Of course, a simple stamping of each inner rib 49 also possible.

Bien entendu, la présente invention n'est pas limité aux exemples de réalisation montrés ci-avant. Elle peut s'appliquer à tout châssis pour article de sport devant satisfaire aux même exigences.Of course, the present invention is not limited to the exemplary embodiments shown above. It can be applied to any chassis for sporting goods in front meet the same requirements.

Claims (15)

  1. Method for manufacturing a U-shaped chassis for a sport gliding article, and of the type comprising at least one support surface (3, 4, 13, 23) capable of receiving a boot and two lateral flanges (2, 12, 22) comprising means (6, 16, 26) for attaching the gliding member(s), characterized in that it includes the steps consisting of:
    cutting in a metallic flank a form corresponding substantially to the developed form of at least one portion (2, 12, 22) of the chassis,
    obtaining by pressing in said portion of the chassis at least one stiffening rib (8, 9, 18, 19, 28, 29) that is elongated in a longitudinal direction of the chassis in an area between at least two attaching means (6, 16, 26).
  2. Manufacturing method according to claim 1, characterized in that the stiffening rib (8, 9, 18, 28, 29) extends toward the inside of the chassis over at least one portion of its length.
  3. Manufacturing method according to claim 1, characterized in that the stiffening rib (8, 9, 18, 28, 29) extends toward the outside of the chassis over at least one portion of its length.
  4. Manufacturing method according to one of claims 1-3, characterized in that it consists of cutting the total developed form of the chassis and obtaining the final form after bending into a U, following the pressing operation.
  5. U-shaped chassis for a gliding article comprising at least one support surface (3, 4, 13, 23) capable of receiving a boot and two lateral flanges (2, 12, 22) comprising means (6, 16, 26) for attaching the gliding member(s), characterized in that it comprises at least one stiffening rib (8, 9, 18, 19, 28, 29) which is obtained on at least one of the flanges (2, 12, 22) by pressing and in that the rib (8, 9, 18, 19, 28, 29) is elongated in a longitudinal direction of the chassis in an area between at least two means (6, 16, 26) for attaching the gliding member(s).
  6. Chassis according to claim 5, characterized in that the rib(s) (8, 9, 18, 28, 29) extends substantially in the longitudinal direction of each flange and is obtained above the means (6, 16, 26) for attaching the gliding member(s).
  7. Chassis according to one of claims 5-6, characterized in that the rib(s) (8, 9, 18, 28, 29) has a substantially arched shape.
  8. Chassis according to one of claims 5-7, characterized in that the rib(s) (8) extends substantially over the whole length of the flange of the chassis.
  9. Chassis according to one of claims 5-7, characterized in that a cutout (a) is associated with the rib(s) (8).
  10. Chassis according to one of claims 5-7, characterized in that the rib(s) (18, 19) extends only over a limited central zone of each flange.
  11. Chassis according to one of claims 5-7, characterized in that the rib(s) (28, 29) extends at the level of the ends of each flange.
  12. Chassis according to one of claim 5, characterized in that the rib(s) (38) extends substantially over the whole surface of the lateral flange (32).
  13. Chassis according to one of claims 5-12, characterized in that the rib(s) extends toward the inside of the chassis.
  14. Chassis according to any one of claims 5-12, characterized in that each rib extends toward the outside of the chassis.
  15. Chassis according to one of claims 5-14, characterized in that the lateral flanges are made of pressed aluminium.
EP96115121A 1995-11-14 1996-09-20 Frame for skate and method for making same Expired - Lifetime EP0774283B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02000865A EP1199091A1 (en) 1995-11-14 1996-09-20 Roller skate frame and process for making such a frame
DE29623927U DE29623927U1 (en) 1995-11-14 1996-09-20 Shoe chassis

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9513707 1995-11-14
FR9513707A FR2740984B1 (en) 1995-11-14 1995-11-14 SKATE CHASSIS AND MANUFACTURING METHOD

Related Child Applications (1)

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EP02000865A Division EP1199091A1 (en) 1995-11-14 1996-09-20 Roller skate frame and process for making such a frame

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EP0774283A1 EP0774283A1 (en) 1997-05-21
EP0774283B1 true EP0774283B1 (en) 2002-05-29
EP0774283B2 EP0774283B2 (en) 2009-01-07

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EP02000865A Withdrawn EP1199091A1 (en) 1995-11-14 1996-09-20 Roller skate frame and process for making such a frame

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US (3) US6301771B1 (en)
EP (2) EP0774283B2 (en)
KR (1) KR980700108A (en)
CN (1) CN1150956C (en)
AT (1) ATE218071T1 (en)
CA (1) CA2190067A1 (en)
DE (1) DE69621402T3 (en)
FR (1) FR2740984B1 (en)
TW (1) TW324964U (en)
WO (1) WO1997018018A1 (en)

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CN1175908A (en) 1998-03-11
FR2740984B1 (en) 1997-12-12
CN1150956C (en) 2004-05-26
DE69621402D1 (en) 2002-07-04
US6848694B2 (en) 2005-02-01
US6293563B1 (en) 2001-09-25
KR980700108A (en) 1998-03-30
WO1997018018A1 (en) 1997-05-22
CA2190067A1 (en) 1997-05-15
EP0774283B2 (en) 2009-01-07
ATE218071T1 (en) 2002-06-15
US6301771B1 (en) 2001-10-16
EP0774283A1 (en) 1997-05-21
EP1199091A1 (en) 2002-04-24
US20020014750A1 (en) 2002-02-07
TW324964U (en) 1998-01-11
FR2740984A1 (en) 1997-05-16
DE69621402T2 (en) 2002-11-21
DE69621402T3 (en) 2009-10-01

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