EP1796874A1 - Polishing tool comprising a drive plate and a removable pad for finishing an ophthalmic lens - Google Patents

Polishing tool comprising a drive plate and a removable pad for finishing an ophthalmic lens

Info

Publication number
EP1796874A1
EP1796874A1 EP05800555A EP05800555A EP1796874A1 EP 1796874 A1 EP1796874 A1 EP 1796874A1 EP 05800555 A EP05800555 A EP 05800555A EP 05800555 A EP05800555 A EP 05800555A EP 1796874 A1 EP1796874 A1 EP 1796874A1
Authority
EP
European Patent Office
Prior art keywords
pad
polishing
plate
polishing tool
drive plate
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
EP05800555A
Other languages
German (de)
French (fr)
Other versions
EP1796874B1 (en
Inventor
Jean-Francois c/o Essilor International BELLY (Compagnie Générale d'Optique)
Laurent Chabin
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.)
EssilorLuxottica SA
Original Assignee
Essilor International Compagnie Generale dOptique 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 Essilor International Compagnie Generale dOptique SA filed Critical Essilor International Compagnie Generale dOptique SA
Publication of EP1796874A1 publication Critical patent/EP1796874A1/en
Application granted granted Critical
Publication of EP1796874B1 publication Critical patent/EP1796874B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • Polishing tool comprising a drive plate and a removable pad for finishing an ophthalmic lens
  • the invention relates to the field of polishing ophthalmic lenses.
  • a rotary polishing tool for such a lens, this tool being intended to be mounted on the spindle of a polishing machine.
  • the manufacture of an ophthalmic lens requires a polishing operation in which a rotating abrasive disc is held against the surface of the lens and sweeps the surface, the lens being itself driven. in rotation. It is therefore necessary to provide steps in which this abrasive disk is replaced by a new disc or a disc of a different grain.
  • Polishing tools or the like are known to facilitate the replacement of an abrasive disc without having to disassemble the tool from the spindle of the polishing machine.
  • Document DE 44 44 496 describes a rotary tool comprising a drive plate which rotates a member through a cross-shaped projection fitting into a recess complementary to the member. The body is held against the drive plate by magnets.
  • the document WO 01/36157 describes a cutting tool whose cutting element is caught between two fastening members held against each other by means of an elastic ring which is integral with one of the fastening members. fastener and which is held against a shoulder provided on the other fastener.
  • Document US Pat. No. 5,931,724 describes a polishing tool comprising a drive plate adapted to drive an abrasive disc in rotation by means of three projecting pinions of the drive plate which fit into three complementary orifices of the abrasive disc and thanks to three pivoting locking members adapted to maintain the abrasive disc against the drive member.
  • WO 01/96067 discloses a polishing tool comprising a drive plate on which is removably mounted an abrasive disc with elastic tabs.
  • the object of the invention is to improve this type of polishing tool which comprises a drive plate on which can be mounted removably an abrasive disc.
  • the invention provides a polishing tool for finishing an ophthalmic lens, comprising: - a drive plate provided with mounting means on the spindle of a polishing machine;
  • a removable polishing pad adapted to be rotated by the drive plate; characterized in that it further comprises - positioning means ensuring a radial immobilization of said pad relative to said plate and allowing axial sliding of the pad relative to the plate;
  • - Retaining means limiting the axial sliding of the pad relative to the plate to a predetermined sliding range;
  • Rotation stop means comprising at least one tooth adapted to engage in a notch of corresponding shape, the tooth and the notch being arranged one on the plate and the other on the pad.
  • Such a polishing tool makes it possible to decouple the setting in position of the polishing pad and its rotation drive.
  • the implementation of the polishing pad is facilitated by the fact that the intervention of the user is limited to the engagement of the polishing pad in the retaining means. It is in fact taken advantage of the force exerted by the spindle of the polishing machine on the ophthalmic lens to lock in rotation the polishing pad by means of stopping rotation.
  • the polishing pad slides freely along the predetermined sliding range and only when the polishing pad is supported on the ophthalmic lens and start of rotation of the spindle that the tooth engages in the notch, at the moment when the tooth and the notch are placed opposite each other at the end of a relative rotation of the drive plate relative to to the polishing pad.
  • the user is exempted from having to orient the pad angularly relative to the plate since the engagement of the tooth in the notch is done automatically.
  • the polishing tool according to the invention may further comprise the following features, alone or in combination: the positioning means comprise a groove in which engages an elastic fixing lug, the groove and the fixing lug being arranged one on the plate and the other on the pad; the groove is circular and the fixing lugs are arranged in a circle so as to materialize a cylinder adapted to engage in the groove; the retaining means comprise a flange disposed in the groove, and a boss disposed on the bracket; the rotation stop means comprise a plurality of notches arranged in a circle and distributed regularly; - The rotation stop means comprise a plurality of teeth arranged in a circle and distributed regularly; the rotation stop means comprise as many notches as teeth; a surface is provided between the notches, this surface being adapted to allow the sliding of the teeth against this surface.
  • FIG. 1 is a perspective view of a polishing tool according to the invention
  • FIG. 2 is an exploded view of the polishing tool of FIG.
  • FIG. 3 is a perspective view of the drive plate of the polishing tool of Figures 1 and 2;
  • FIG. 4 is a perspective view of the polishing pad of the tool of FIGS. 1 and 2;
  • FIG. 5 is a perspective view of the polishing tool of Figure 1 in a diametral section
  • FIG. 6 is a front view of the section of Figure 5;
  • Figure 1 shows the polishing tool 1 ready to be mounted on the rotating spindle of a polishing machine.
  • the type of polishing machine for which the tool 1 is provided is adapted to impart a rotational movement to a tool mounted on its spindle while exerting a pressure force on the tool, during its rotation, against the surface of the lens ophthalmic to polish.
  • This pressure force is generally exerted by a pressure agent such as compressed air.
  • FIG. 2 The exploded view of FIG. 2 makes it possible to distinguish the constituents of the polishing tool 1.
  • the tool 1 comprises indeed a ball joint 2 having a threaded bore
  • a drive plate 4 is fixed to the ball 2 and a polishing pad 5 is attached to the drive plate 4.
  • a polishing pad 6 is further fixed on the polishing pad 5.
  • the polishing pad has an abrasive surface 7 providing the effective polishing operation by contacting the surface of the lens to be polished.
  • FIG. 3 shows in perspective the driving plate 4, viewed from below with respect to its position in FIG. 2.
  • the drive plate 4 is in the form of a cylinder which has a groove 8 on its periphery.
  • the driving plate 4 also comprises, on its visible face in FIG. 3 (that is to say on its face opposite to the ball 2), a circular groove 9 extending in the same direction as the cylinder forming the drive plate 4.
  • the inner edges of this groove 9 comprise a flange 10 projecting transversely to the groove 9 at the surface of the drive plate 4.
  • Six teeth 11 of rectangular section are further disposed around the periphery of this surface of the drive plate 4.
  • the circular groove 9 delimits a central abutment 12 flush with the same level as the teeth 11.
  • FIG. 4 shows in perspective the polishing pad 5 intended to cooperate with the drive plate 4, the polishing pad 5 being in the position which is its position in FIG. 2.
  • the polishing pad 5 is a rigid disk comprising resiliently deformable and transversely protruding fixing tabs 13 disposed all around the pad 5 so as to materialize a cylinder adapted to engage in the circular groove 9 of the drive plate 4.
  • Each of the fastening lugs 13 has a boss 14 facing inwards.
  • the polishing pad 5 also has notches 15 disposed over the entire circumference of the pad 5, outside the cylinder materialized by the fastening tabs 13. These notches 15 are adapted to the engagement of the teeth 11 of the drive plate 4 and have a depth at least equal to the height of the teeth 11.
  • FIGS. 5 and 6 show the cooperation of the patella 2, the plate 4 and the polishing pad 5.
  • the drive plate 4 is thus fixed on the ball 2 by any known means, the ball 2 receiving a circular seal 17 engaging in the groove 8 of the drive plate 4.
  • the fixing lugs 13 of the polishing pad 5 are engaged in the circular groove 9 of the drive plate 4 so that the plate 4 is immobilized radially relative to the shoe 5 but can slide axially along a sliding range which is limited by the abutment bosses 14 against the flange 10.
  • the polishing tool 1 is used in the following manner.
  • the drive plate 4 and its ball 2 are first mounted on the spindle of the polishing machine. These elements are intended to remain stationary on the spindle of the machine, only the change of the polishing pad 5 is necessary to replace a used polishing pad 6 or to change the polishing characteristics.
  • the polishing pad 5 is then engaged in the drive plate 4 so that the fastening tabs 13 deform so that the bosses can penetrate into the groove 9 by passing through the collar 10 without taking into account the relative position of the teeth 11 and notches 15.
  • the intervention of the user is limited to this commitment.
  • the polishing pad 5, although retained in the groove 9 can not be rotated at this stage.
  • the polishing tool 1 is then placed in position against the surface of the ophthalmic lens to be machined and the rotation of the spindle is activated simultaneously or subsequently.
  • the teeth 11 then slide on the pad 5 until they engage automatically in the notches 15.
  • the rotation drive of the pad 5 starts and the polishing operation is continued in a conventional manner.
  • the polishing pad 5 can be used directly, without polishing pad, it then itself comprises an abrasive surface.
  • the teeth 11 and the notches 15 may have a different form from that described here, it is sufficient that their mutual commitment is allowed.
  • the position of the teeth 11 and notches 15 can be further inverted so that the teeth 11 are attached to the pad 5 and the notches 15 are formed on the plate 4. The same is true for the groove 9 and the tabs 13 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The invention relates to a polishing tool (1) for finishing an ophthalmic lens. The inventive tool comprises: a drive plate (4) which is equipped with means (2) for mounting same to the spindle of a polishing machine; a removable polishing pad (5) which is designed to be rotated by the drive plate (4); positioning means which can be used to block the radial movement of the pad (5) in relation to the plate (4) as well as to enable the pad (5) to slide axially in relation the plate (4); retaining means which limit the axial sliding movement of the pad (5) in relation to the plate (4) to a pre-determined sliding range; and means for stopping said rotational movement, comprising at least one tooth which can be engaged in a slot having a corresponding shape, one of said elements being provided on the plate (4) and the other on the pad (5).

Description

Outil de polissage comportant un plateau d'entraînement et un patin amovible pour la finition d'une lentille ophtalmique Polishing tool comprising a drive plate and a removable pad for finishing an ophthalmic lens
L'invention a trait au domaine du polissage des lentilles ophtalmiques.The invention relates to the field of polishing ophthalmic lenses.
Elle concerne plus particulièrement un outil de polissage rotatif pour une telle lentille, cet outil étant prévu pour être monté sur la broche d'une machine à polir. La fabrication d'une lentille ophtalmique nécessite dans certains cas d'avoir recours à une opération de polissage au cours de laquelle un disque abrasif entraîné en rotation est maintenu contre la surface de la lentille et balaye cette surface, la lentille étant elle-même entraînée en rotation. Il est par conséquent nécessaire de prévoir des étapes au cours desquelles ce disque abrasif est remplacé par un disque neuf ou par un disque d'un grain différent.It relates more particularly to a rotary polishing tool for such a lens, this tool being intended to be mounted on the spindle of a polishing machine. In some cases, the manufacture of an ophthalmic lens requires a polishing operation in which a rotating abrasive disc is held against the surface of the lens and sweeps the surface, the lens being itself driven. in rotation. It is therefore necessary to provide steps in which this abrasive disk is replaced by a new disc or a disc of a different grain.
On connaît des outils de polissage ou analogues adaptés à faciliter le remplacement d'un disque abrasif sans avoir à démonter l'outil de la broche de la machine à polir.Polishing tools or the like are known to facilitate the replacement of an abrasive disc without having to disassemble the tool from the spindle of the polishing machine.
Le document US 2001/0041650 décrit une tête de polissage rattachée à un disque abrasif grâce à des lames ressort latérales fixées sur la tête de polissage et s'engageant dans une rainure pratiquée sur le pourtour du disque abrasif.Document US 2001/0041650 discloses a polishing head attached to an abrasive disk by means of lateral spring blades fixed on the polishing head and engaging in a groove formed around the periphery of the abrasive disc.
Le document DE 44 44 496 décrit quant à lui un outil rotatif comportant un plateau d'entraînement qui entraîne en rotation un organe grâce à une saillie en forme de croix s'insérant dans un renfoncement complémentaire de l'organe. Le maintien de l'organe contre le plateau d'entraînement est assuré par des aimants.Document DE 44 44 496 describes a rotary tool comprising a drive plate which rotates a member through a cross-shaped projection fitting into a recess complementary to the member. The body is held against the drive plate by magnets.
Par ailleurs, le document WO 01/36157 décrit un outil de coupe dont l'élément coupant est pris entre deux organes d'attache maintenus l'un contre l'autre grâce à un anneau élastique qui est solidaire de l'un des organes d'attache et qui est maintenu contre un épaulement prévu sur l'autre organe d'attache. Le document US 5 931 724 décrit quant à lui un outil de polissage comportant un plateau d'entraînement adapté à entraîner en rotation un disque abrasif grâce à trois pions saillants du plateau d'entraînement qui s'insèrent dans trois orifices complémentaires du disque abrasif et grâce à trois organes pivotants de verrouillage adaptés à maintenir le disque abrasif contre l'organe d'entraînement.Furthermore, the document WO 01/36157 describes a cutting tool whose cutting element is caught between two fastening members held against each other by means of an elastic ring which is integral with one of the fastening members. fastener and which is held against a shoulder provided on the other fastener. Document US Pat. No. 5,931,724 describes a polishing tool comprising a drive plate adapted to drive an abrasive disc in rotation by means of three projecting pinions of the drive plate which fit into three complementary orifices of the abrasive disc and thanks to three pivoting locking members adapted to maintain the abrasive disc against the drive member.
Par ailleurs, le document WO 01/96067 décrit un outil de polissage comportant un plateau d'entraînement sur lequel est monté de manière amovible un disque abrasif grâce à des pattes élastiques. Le but de l'invention est d'améliorer ce type d'outil de polissage qui comporte un plateau d'entraînement sur lequel peut être monté de manière amovible un disque abrasif.Furthermore, WO 01/96067 discloses a polishing tool comprising a drive plate on which is removably mounted an abrasive disc with elastic tabs. The object of the invention is to improve this type of polishing tool which comprises a drive plate on which can be mounted removably an abrasive disc.
A cet effet, l'invention vise un outil de polissage pour la finition d'une lentille ophtalmique, comportant : - un plateau d'entraînement muni de moyens de montage sur la broche d'une machine à polir ;For this purpose, the invention provides a polishing tool for finishing an ophthalmic lens, comprising: - a drive plate provided with mounting means on the spindle of a polishing machine;
- un patin de polissage amovible adapté à être entraîné en rotation par le plateau d'entraînement ; caractérisé en ce qu'il comporte en outre - des moyens de mise en position assurant une immobilisation radiale dudit patin par rapport audit plateau et permettant un coulissement axial du patin par rapport au plateau ;a removable polishing pad adapted to be rotated by the drive plate; characterized in that it further comprises - positioning means ensuring a radial immobilization of said pad relative to said plate and allowing axial sliding of the pad relative to the plate;
- des moyens de retenue limitant le coulissement axial du patin par rapport au plateau à une plage de coulissement prédéterminée ; - des moyens d'arrêt en rotation comportant au moins une dent adaptée à s'engager dans une encoche de forme correspondante, la dent et l'encoche étant disposées l'une sur le plateau et l'autre sur le patin.- Retaining means limiting the axial sliding of the pad relative to the plate to a predetermined sliding range; - Rotation stop means comprising at least one tooth adapted to engage in a notch of corresponding shape, the tooth and the notch being arranged one on the plate and the other on the pad.
Un tel outil de polissage permet de découpler la mise en position du patin de polissage et son entraînement en rotation. La mise en place du patin de polissage est facilitée par le fait que l'intervention de l'utilisateur se borne à l'engagement du patin de polissage dans les moyens de retenue. II est en effet tiré parti de la force exercée par la broche de la machine à polir sur la lentille ophtalmique pour verrouiller en rotation le patin de polissage grâce aux moyens d'arrêt en rotation.Such a polishing tool makes it possible to decouple the setting in position of the polishing pad and its rotation drive. The implementation of the polishing pad is facilitated by the fact that the intervention of the user is limited to the engagement of the polishing pad in the retaining means. It is in fact taken advantage of the force exerted by the spindle of the polishing machine on the ophthalmic lens to lock in rotation the polishing pad by means of stopping rotation.
Lors de l'engagement du patin de polissage dans les moyens de retenue, le patin de polissage coulisse librement le long de la plage de coulissement prédéterminée et ce n'est que lors de l'appui du patin de polissage sur la lentille ophtalmique et du démarrage de la rotation de la broche que la dent vient s'engager dans l'encoche, au moment où la dent et l'encoche se placent en vis-à-vis au terme d'une rotation relative du plateau d'entraînement par rapport au patin de polissage.When the polishing pad is engaged in the retaining means, the polishing pad slides freely along the predetermined sliding range and only when the polishing pad is supported on the ophthalmic lens and start of rotation of the spindle that the tooth engages in the notch, at the moment when the tooth and the notch are placed opposite each other at the end of a relative rotation of the drive plate relative to to the polishing pad.
L'utilisateur est dispensé d'avoir à orienter angulairement le patin par rapport au plateau puisque l'engagement de la dent dans l'encoche se fait automatiquement.The user is exempted from having to orient the pad angularly relative to the plate since the engagement of the tooth in the notch is done automatically.
L'outil de polissage selon l'invention peut en outre comporter les caractéristiques suivantes, seules ou en combinaison : les moyens de mise en position comportent une rainure dans laquelle s'engage une patte de fixation élastique, la rainure et la patte de fixation étant disposées l'une sur le plateau et l'autre sur le patin ; la rainure est circulaire et les pattes de fixation sont disposées en cercle de sorte à matérialiser un cylindre adapté à s'engager dans la rainure ; les moyens de retenue comportent une collerette disposée dans la rainure, ainsi qu'un bossage disposé sur la patte de fixation ; les moyens d'arrêt en rotation comportent plusieurs encoches disposées en cercle et réparties régulièrement ; - les moyens d'arrêt en rotation comportent plusieurs dents disposées en cercle et réparties régulièrement ; les moyens d'arrêt en rotation comportent autant d'encoches que de dents ; une surface est prévue entre les encoches, cette surface étant adaptée à permettre le glissement des dents contre cette surface.The polishing tool according to the invention may further comprise the following features, alone or in combination: the positioning means comprise a groove in which engages an elastic fixing lug, the groove and the fixing lug being arranged one on the plate and the other on the pad; the groove is circular and the fixing lugs are arranged in a circle so as to materialize a cylinder adapted to engage in the groove; the retaining means comprise a flange disposed in the groove, and a boss disposed on the bracket; the rotation stop means comprise a plurality of notches arranged in a circle and distributed regularly; - The rotation stop means comprise a plurality of teeth arranged in a circle and distributed regularly; the rotation stop means comprise as many notches as teeth; a surface is provided between the notches, this surface being adapted to allow the sliding of the teeth against this surface.
D'autres caractéristiques et avantages de l'invention apparaissent à la lumière de la description qui va suivre d'un mode de réalisation préféré donné à titre d'exemple non limitatif, description faite en référence aux dessins annexés dans lesquels :Other characteristics and advantages of the invention appear in the light of the following description of a preferred embodiment. given by way of non-limiting example, description made with reference to the accompanying drawings in which:
- la figure 1 est une vue en perspective d'un outil de polissage selon l'invention ; - la figure 2 est une vue éclatée de l'outil de polissage de la figure- Figure 1 is a perspective view of a polishing tool according to the invention; FIG. 2 is an exploded view of the polishing tool of FIG.
1 ;1;
- la figure 3 est une vue en perspective du plateau d'entraînement de l'outil de polissage des figures 1 et 2 ;- Figure 3 is a perspective view of the drive plate of the polishing tool of Figures 1 and 2;
- la figure 4 est une vue en perspective du patin de polissage de l'outil des figures 1 et 2 ;FIG. 4 is a perspective view of the polishing pad of the tool of FIGS. 1 and 2;
- la figure 5 est une vue en perspective de l'outil de polissage de la figure 1 selon une coupe diamétrale ;- Figure 5 is a perspective view of the polishing tool of Figure 1 in a diametral section;
- la figure 6 est une vue de face de la coupe de la figure 5 ;- Figure 6 is a front view of the section of Figure 5;
La figure 1 montre l'outil de polissage 1 prêt à être monté sur la broche rotative d'une machine à polir.Figure 1 shows the polishing tool 1 ready to be mounted on the rotating spindle of a polishing machine.
Le type de machine à polir pour lequel l'outil 1 est prévu est adapté à imprimer un mouvement de rotation à un outil monté sur sa broche tout en exerçant une force de pression sur cet outil, pendant sa rotation, contre la surface de la lentille ophtalmique à polir. Cette force de pression est généralement exercée par un agent de pression tel que de l'air comprimé.The type of polishing machine for which the tool 1 is provided is adapted to impart a rotational movement to a tool mounted on its spindle while exerting a pressure force on the tool, during its rotation, against the surface of the lens ophthalmic to polish. This pressure force is generally exerted by a pressure agent such as compressed air.
La vue éclatée de la figure 2 permet de distinguer les constituants de l'outil de polissage 1.The exploded view of FIG. 2 makes it possible to distinguish the constituents of the polishing tool 1.
L'outil 1 comporte en effet une rotule 2 comportant un alésage filetéThe tool 1 comprises indeed a ball joint 2 having a threaded bore
3 pour son montage sur la broche de la machine à polir. Un plateau d'entraînement 4 est fixé à la rotule 2 et un patin de polissage 5 est rattaché au plateau d'entraînement 4. Un tampon de polissage 6 est de plus fixé sur le patin de polissage 5.3 for mounting on the spindle of the polishing machine. A drive plate 4 is fixed to the ball 2 and a polishing pad 5 is attached to the drive plate 4. A polishing pad 6 is further fixed on the polishing pad 5.
Le tampon de polissage comporte une surface abrasive 7 assurant l'opération effective de polissage en entrant en contact avec la surface de la lentille à polir.The polishing pad has an abrasive surface 7 providing the effective polishing operation by contacting the surface of the lens to be polished.
La figure 3 montre en perspective le plateau d'entraînement 4, vu de dessous par rapport à sa position de la figure 2. Le plateau d'entraînement 4 se présente sous la forme d'un cylindre qui comporte une gorge 8 sur son pourtour. Le plateau d'entraînement 4 comporte, également, sur sa face visible sur la figure 3 (c'est-à-dire sur sa face opposée à la rotule 2) une rainure circulaire 9 s'étendant dans la même direction que le cylindre formant le plateau d'entraînement 4. Les bords intérieurs de cette rainure 9 comportent une collerette 10 saillante transversalement à la rainure 9 au niveau de la surface du plateau d'entraînement 4.FIG. 3 shows in perspective the driving plate 4, viewed from below with respect to its position in FIG. 2. The drive plate 4 is in the form of a cylinder which has a groove 8 on its periphery. The driving plate 4 also comprises, on its visible face in FIG. 3 (that is to say on its face opposite to the ball 2), a circular groove 9 extending in the same direction as the cylinder forming the drive plate 4. The inner edges of this groove 9 comprise a flange 10 projecting transversely to the groove 9 at the surface of the drive plate 4.
Six dents 11 à section rectangulaire sont de plus disposées sur le pourtour de cette surface du plateau d'entraînement 4.Six teeth 11 of rectangular section are further disposed around the periphery of this surface of the drive plate 4.
La rainure circulaire 9 délimite une butée centrale 12 affleurant au même niveau que les dents 11.The circular groove 9 delimits a central abutment 12 flush with the same level as the teeth 11.
La figure 4 montre en perspective le patin de polissage 5 prévu pour coopérer avec le plateau d'entraînement 4, le patin de polissage 5 étant dans la position qui est la sienne sur la figure 2.FIG. 4 shows in perspective the polishing pad 5 intended to cooperate with the drive plate 4, the polishing pad 5 being in the position which is its position in FIG. 2.
Le patin de polissage 5 est un disque rigide comportant des pattes de fixation 13 élastiquement déformables et saillantes transversalement et disposées sur tout le pourtour du patin 5 de manière à matérialiser un cylindre adapté à s'engager dans la rainure circulaire 9 du plateau d'entraînement 4. Chacune des pattes de fixation 13 comporte un bossage 14 tourné vers l'intérieur.The polishing pad 5 is a rigid disk comprising resiliently deformable and transversely protruding fixing tabs 13 disposed all around the pad 5 so as to materialize a cylinder adapted to engage in the circular groove 9 of the drive plate 4. Each of the fastening lugs 13 has a boss 14 facing inwards.
Le patin de polissage 5 comporte également des encoches 15 disposées sur toute la circonférence du patin 5, à l'extérieur du cylindre matérialisé par les pattes de fixation 13. Ces encoches 15 sont adaptées à l'engagement des dents 11 du plateau d'entraînement 4 et présentent une profondeur au moins égale à la hauteur des dents 11.The polishing pad 5 also has notches 15 disposed over the entire circumference of the pad 5, outside the cylinder materialized by the fastening tabs 13. These notches 15 are adapted to the engagement of the teeth 11 of the drive plate 4 and have a depth at least equal to the height of the teeth 11.
Par ailleurs, la surface 16 située à l'intérieur du cylindre matérialisé par les pattes de fixation 13 est au même niveau que la surface de fond des encoches 15. Les coupes des figures 5 et 6 montrent la coopération de la rotule 2, du plateau d'entraînement 4 et du patin de polissage 5. Le plateau d'entraînement 4 est ainsi fixé sur la rotule 2 par tout moyen connu, la rotule 2 recevant un joint circulaire 17 s'engageant dans la gorge 8 du plateau d'entraînement 4.Furthermore, the surface 16 located inside the cylinder materialized by the fastening tabs 13 is at the same level as the bottom surface of the notches 15. The sections of FIGS. 5 and 6 show the cooperation of the patella 2, the plate 4 and the polishing pad 5. The drive plate 4 is thus fixed on the ball 2 by any known means, the ball 2 receiving a circular seal 17 engaging in the groove 8 of the drive plate 4.
Les pattes de fixation 13 du patin de polissage 5 sont engagées dans la rainure circulaire 9 du plateau d'entraînement 4 de manière que le plateau 4 soit immobilisé radialement par rapport au patin 5 mais puisse coulisser axialement le long d'une plage de coulissement qui est limitée par la mise en butée des bossages 14 contre la collerette 10.The fixing lugs 13 of the polishing pad 5 are engaged in the circular groove 9 of the drive plate 4 so that the plate 4 is immobilized radially relative to the shoe 5 but can slide axially along a sliding range which is limited by the abutment bosses 14 against the flange 10.
L'outil de polissage 1 est employé de la manière suivante. Le plateau d'entraînement 4 et sa rotule 2 sont tout d'abord montés sur la broche de la machine à polir. Ces éléments sont prévus pour rester à poste sur la broche de la machine, seul le changement du patin de polissage 5 étant nécessaire pour remplacer un tampon de polissage 6 usé ou pour changer les caractéristiques du polissage. Le patin de polissage 5 est ensuite engagé dans le plateau d'entraînement 4 de manière que les pattes de fixation 13 se déforment pour que les bossages puissent pénétrer dans la rainure 9 en franchissant la collerette 10 sans tenir compte de la position relative des dents 11 et des encoches 15. L'intervention de l'utilisateur se limite à cet engagement. Le patin de polissage 5, bien que retenu dans la rainure 9 ne peut pas être à ce stade entraîné en rotation.The polishing tool 1 is used in the following manner. The drive plate 4 and its ball 2 are first mounted on the spindle of the polishing machine. These elements are intended to remain stationary on the spindle of the machine, only the change of the polishing pad 5 is necessary to replace a used polishing pad 6 or to change the polishing characteristics. The polishing pad 5 is then engaged in the drive plate 4 so that the fastening tabs 13 deform so that the bosses can penetrate into the groove 9 by passing through the collar 10 without taking into account the relative position of the teeth 11 and notches 15. The intervention of the user is limited to this commitment. The polishing pad 5, although retained in the groove 9 can not be rotated at this stage.
L'outil de polissage 1 est alors mis en position contre la surface de la lentille ophtalmique à usiner et la rotation de la broche est activée simultanément ou postérieurement. Les dents 11 glissent alors sur le patin 5 jusqu'à leur engagement automatique dans les encoches 15.The polishing tool 1 is then placed in position against the surface of the ophthalmic lens to be machined and the rotation of the spindle is activated simultaneously or subsequently. The teeth 11 then slide on the pad 5 until they engage automatically in the notches 15.
L'entraînement en rotation du patin 5 démarre et l'opération de polissage se poursuit de manière classique.The rotation drive of the pad 5 starts and the polishing operation is continued in a conventional manner.
Des variantes de réalisation de cet outil peuvent être envisagées sans pour autant sortir du cadre de l'invention. Notamment, Ie patin de polissage 5 peut être utilisé directement, sans tampon de polissage, il comporte alors lui-même une surface abrasive. Par ailleurs, les dents 11 et les encoches 15 peuvent avoir une forme différente de celle décrite ici, il suffit que leur engagement mutuel soit permis. La position des dents 11 et des encoches 15 peut de plus être inversée de sorte que les dents 11 soient rattachées au patin 5 et que les encoches 15 soient pratiquées sur le plateau 4. Il en va de même pour la rainure 9 et les pattes 13. Alternative embodiments of this tool can be envisaged without departing from the scope of the invention. In particular, the polishing pad 5 can be used directly, without polishing pad, it then itself comprises an abrasive surface. Moreover, the teeth 11 and the notches 15 may have a different form from that described here, it is sufficient that their mutual commitment is allowed. The position of the teeth 11 and notches 15 can be further inverted so that the teeth 11 are attached to the pad 5 and the notches 15 are formed on the plate 4. The same is true for the groove 9 and the tabs 13 .

Claims

REVENDICATIONS
1. Outil de polissage (1) pour la finition d'une lentille ophtalmique, comportant : - un plateau d'entraînement (4) muni de moyens de montage (2) sur la broche d'une machine à polir ;Polishing tool (1) for finishing an ophthalmic lens, comprising: - a drive plate (4) provided with mounting means (2) on the spindle of a polishing machine;
- un patin de polissage amovible (5) adapté à être entraîné en rotation par le plateau d'entraînement (4) ; caractérisé en ce qu'il comporte en outre - des moyens de mise en position (9, 13) assurant une immobilisation radiale dudit patin (5) par rapport audit plateau (4) et permettant un coulissement axial du patin (5) par rapport au plateau (4) ;- A removable polishing pad (5) adapted to be rotated by the drive plate (4); characterized in that it further comprises - positioning means (9, 13) ensuring a radial immobilization of said pad (5) relative to said plate (4) and allowing axial sliding of the pad (5) relative to the tray (4);
- des moyens de retenue (10, 14) limitant le coulissement axial du patin (5) par rapport au plateau (4) à une plage de coulissement prédéterminée ;- retaining means (10, 14) limiting the axial sliding of the pad (5) relative to the plate (4) to a predetermined sliding range;
- des moyens d'arrêt en rotation comportant au moins une dent (11) adaptée à s'engager dans une encoche de forme correspondante, la dent (11) et l'encoche (15) étant disposées l'une sur le plateau (4) et l'autre sur le patin- Stopping means in rotation comprising at least one tooth (11) adapted to engage in a notch of corresponding shape, the tooth (11) and the notch (15) being arranged one on the plate (4). ) and the other on the skate
(5). (5).
2. Outil de polissage selon la revendication 1 , caractérisé en ce que les moyens de mise en position comportent une rainure (9) dans laquelle s'engage une patte de fixation élastique (13), la rainure (9) et la patte de fixation (13) étant disposées l'une sur le plateau (4) et l'autre sur le patin (5).2. polishing tool according to claim 1, characterized in that the positioning means comprise a groove (9) in which engages an elastic fixing lug (13), the groove (9) and the fixing lug. (13) being arranged one on the plate (4) and the other on the pad (5).
3. Outil de polissage selon la revendication 2, caractérisé en ce que la rainure (9) est circulaire et en ce que les pattes de fixation (13) sont disposées en cercle de sorte à matérialiser un cylindre adapté à s'engager dans la rainure (9).3. Polishing tool according to claim 2, characterized in that the groove (9) is circular and in that the fastening lugs (13) are arranged in a circle so as to materialize a cylinder adapted to engage in the groove (9).
4. Outil de polissage selon l'une des revendications 2 et 3, caractérisé en ce que les moyens de retenue comportent une collerette (10) disposée dans la rainure (9), ainsi qu'un bossage (14) disposé sur la patte de fixation (13). 4. polishing tool according to one of claims 2 and 3, characterized in that the retaining means comprise a flange (10) disposed in the groove (9), and a boss (14) disposed on the leg of fixing (13).
5. Outil de polissage selon l'une des revendications 1 à 4, caractérisé en ce que les moyens d'arrêt en rotation comportent plusieurs encoches (15) disposées en cercle et réparties régulièrement.5. polishing tool according to one of claims 1 to 4, characterized in that the rotation stop means comprise a plurality of notches (15) arranged in a circle and regularly distributed.
6. Outil de polissage selon l'une des revendications 1 à 5, caractérisé en ce que les moyens d'arrêt en rotation comportent plusieurs dentsPolishing tool according to one of Claims 1 to 5, characterized in that the rotation stop means comprise several teeth.
(11) disposées en cercle et réparties régulièrement.(11) arranged in a circle and distributed regularly.
7. Outil de polissage selon l'une des revendications 1 à 6, caractérisé en ce que les moyens d'arrêt en rotation comportent autant d'encoches (15) que de dents (11 ). Polishing tool according to one of claims 1 to 6, characterized in that the rotation stop means comprise as many notches (15) as teeth (11).
8. Outil de polissage selon l'une des revendications 5 à 7, caractérisé en ce que, entre les encoches (15), est prévue une surface adaptée à permettre le glissement des dents (11 ) contre cette surface. 8. polishing tool according to one of claims 5 to 7, characterized in that, between the notches (15), is provided a surface adapted to allow the sliding of the teeth (11) against this surface.
EP05800555A 2004-09-10 2005-09-01 Polishing tool comprising a drive plate and a removable pad for finishing an ophthalmic lens Active EP1796874B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0409636A FR2875155B1 (en) 2004-09-10 2004-09-10 POLISHING TOOL COMPRISING A TRAINING TRAY AND A REMOVABLE SKATE FOR FINISHING AN OPHTHALMIC LENS
PCT/FR2005/002182 WO2006030091A1 (en) 2004-09-10 2005-09-01 Polishing tool comprising a drive plate and a removable pad for finishing an ophthalmic lens

Publications (2)

Publication Number Publication Date
EP1796874A1 true EP1796874A1 (en) 2007-06-20
EP1796874B1 EP1796874B1 (en) 2008-05-28

Family

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EP05800555A Active EP1796874B1 (en) 2004-09-10 2005-09-01 Polishing tool comprising a drive plate and a removable pad for finishing an ophthalmic lens

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US (1) US8029341B2 (en)
EP (1) EP1796874B1 (en)
JP (1) JP4814884B2 (en)
AT (1) ATE396830T1 (en)
DE (1) DE602005007259D1 (en)
FR (1) FR2875155B1 (en)
WO (1) WO2006030091A1 (en)

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Also Published As

Publication number Publication date
WO2006030091A1 (en) 2006-03-23
US20080096478A1 (en) 2008-04-24
US8029341B2 (en) 2011-10-04
JP2008512256A (en) 2008-04-24
FR2875155B1 (en) 2006-12-08
DE602005007259D1 (en) 2008-07-10
ATE396830T1 (en) 2008-06-15
FR2875155A1 (en) 2006-03-17
EP1796874B1 (en) 2008-05-28
JP4814884B2 (en) 2011-11-16

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