EP0347270B1 - Grinding machines - Google Patents

Grinding machines Download PDF

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Publication number
EP0347270B1
EP0347270B1 EP89401379A EP89401379A EP0347270B1 EP 0347270 B1 EP0347270 B1 EP 0347270B1 EP 89401379 A EP89401379 A EP 89401379A EP 89401379 A EP89401379 A EP 89401379A EP 0347270 B1 EP0347270 B1 EP 0347270B1
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EP
European Patent Office
Prior art keywords
cover
carriage
casing
fixed
machine according
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EP89401379A
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German (de)
French (fr)
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EP0347270A1 (en
Inventor
Raynald Gaston Marcel Longuet
Jean-Pierre Marie Fernand Langlois
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Briot International SA
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Briot International SA
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    • 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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B24B9/146—Accessories, e.g. lens mounting devices

Definitions

  • the present invention relates to machines for grinding ophthalmic lenses.
  • a conventional ophthalmic lens grinding machine usually comprises a grinding wheel mounted on a rotary horizontal axis and a carriage movable on a second horizontal axis parallel to the first and situated above and behind the latter.
  • the mobile carriage has a general U shape; it is articulated on its axis by its intermediate part so that its parallel lateral wings extend perpendicular to the axis of the grinding wheel and above it.
  • the U-shaped carriage Between the lateral wings of the U-shaped carriage extends an axis in two parts between which a glass to be cut is clamped, and a jig is mounted on one end of the axis carrying the glass and bears on a key, or stop; the carriage is movable around its support axis and along it to bring the glass to be cut into contact with the grinding wheel, and the template in contact with the key.
  • a watering ramp projects water onto the grinding wheel and the glass to be cut.
  • the sprayed water forms a mist and splashes, the operator of which is protected by a transparent mask placed in front of the grinding wheel and the glass, or by a removable and hinged cover, also transparent.
  • the object of the invention is to produce a grinding machine of the aforementioned type comprising means for protecting the operator against splashing, these means opening automatically and simultaneously causing the lifting of the carriage when the size of the glass is completed.
  • the subject of the invention is to this end a machine for grinding ophthalmic lenses, comprising a casing having as a whole a roughly parallelepiped shape open at its upper part and housing a grinding wheel driven in rotation on a first horizontal axis, a carriage generally U-shaped articulated on a second horizontal axis which is fixed and located above and behind the first axis and carrying between its lateral wings an axis in two parts clamping between them the glass to be cut, said carriage being movable around said second axis and along it and said wings applying the glass to the grinding wheel by gravity, machine characterized in that it comprises a cover having an articulated upper panel mounted oscillating in the casing between a high, closed position, and a low, open position, a motor for driving said cover, and first and second means for raising the carriage and said panel, respectively lo rsque the cover moves from its high position to its low position.
  • the cover comprises two parallel lateral cheeks joined by an intermediate part on an edge of which is articulated said upper panel, the latter being transparent.
  • the cover is mounted oscillating on pins attached to the sides of the casing and engaged in holes provided in the ends of said cheeks.
  • the hood drive motor is integral with the housing and drives, via a reduction gear, a pinion engaged with a toothed sector or other rack on one of said cheeks.
  • the hood drive motor is secured to the casing and drives, via a reduction gear, a link articulated on a lever secured to said hood.
  • end-of-travel microswitches are provided to stop said motor in the top and bottom positions of the hood.
  • said means for raising the carriage when the cover passes into its low position comprise a projection on the cover, cooperating with an opposite projection on the carriage.
  • said means for raising the upper panel comprise at least one stop carried by an arm secured to said casing.
  • said arm is constituted by a fixed vertical extension of a support of the axis carrying the carriage.
  • the hood drive motor is conveniently controlled by a switch mounted on the housing.
  • Figure 1 is a perspective view of a machine for grinding ophthalmic lenses according to the invention with its cover in the high position, closed.
  • Figure 2 shows the same machine, in perspective, but with its cover in the low, open position.
  • FIG. 3 is a side elevation view in section of the grinding machine shown in FIGS. 1 and 2.
  • FIG. 4 is a sectional view along line IV IV of FIG. 3.
  • Figure 5 is a detail view of a variant of the hood drive means.
  • a machine for grinding ophthalmic lenses which comprises a casing 1 of generally parallelepipedal shape (according to the example shown) open at its upper part, housing the mechanism the machine and in which a cover 2 is articulated comprising two parallel lateral cheeks 3 connected by an intermediate part 4 on an upper edge of which is articulated a transparent panel 5.
  • the machine mechanism comprises a first horizontal axis 6, rotary, carrying a grinding wheel 7 and driven by a motor 8 carried by a support 9.
  • the grinding wheel 7 rotates in the lower part, open upwards, a secondary casing 10 in two parts, for a purpose which will be indicated below.
  • a second horizontal axis 11 fixed, carried by two supports 12 and on which is articulated a carriage 13 having as a whole a U shape.
  • the carriage 13 Between its lateral wings, the carriage 13 carries an axis 14 in two parts between which a glass for grinding is clamped 15.
  • the arrangement is such that the carriage 13 can oscillate around the axis 11 behind and above the grinding wheel 7 in order to apply the glass to be ground on it, from top to bottom by gravity.
  • a template 16 On a continuation of the axis 14 is mounted a template 16, externally to the carriage 13, this template also being applied from top to bottom on a key, or stop, 17.
  • the glass 15 rotates, between the wings of the carriage 13, in the upper part 10 ′, open downwards, of the secondary casing 10.
  • the carriage 13 can thus oscillate around the axis 11 between a low position shown in FIG. 4 in which the glass 15 is in contact with the grinding wheel 7 and / or the template 16 with the key 17, and a high position shown at Figure 3 in which the glass is spaced from the grinding wheel. In these two positions, the carriage 13 - and the part 10 'of the cover 10 - protrude upwards, outside the casing 1.
  • a water distribution ramp 18 is mounted in the cover 10 and is connected to a power source in order to project a jet of water on the grinding wheel and on the edge of the glass to be ground 15.
  • the intermediate part 4 of the cover 2 is arranged parallel to the axis 11 and on the side opposite to the grinding wheel relative to this axis, and the cover 2 is articulated in the casing 1 by means of two pins 19 integral with the casing 1 and which extend through corresponding holes provided at the ends of the side flanges of the cover 1, as shown in FIGS. 3 and 4, along the two opposite sides of the casing 1.
  • the cover can oscillate vertically around the pins 19 between the low position shown in solid lines and the high position shown in phantom in FIG. 4.
  • a drive device which comprises a motor 20, fixed on a lug 21 integral with one of the supports 12 of the axis 11 of the carriage and extending towards the grinding wheel 7.
  • the motor 20 first of all drives a reduction box 22 having an output pinion which attacks a toothed sector or other rack 23 fixed on the internal face of the corresponding cheek 3.
  • each of the supports 12 of the axis 11 an arm 24 which extends upwards, approximately vertically, and has at its end upper a roller 25.
  • the panel 5 abuts on the rollers 25 which hold it in the high position by making it oscillate around its articulation on the upper edge of the intermediate part of the cover 2.
  • a finger 26 projecting from the internal surface of the intermediate part of the cover 2, in the direction of the axis 11 of the carriage, and a corresponding finger 27 from the rear part of the carriage, projecting towards the part intermediate of the cover and in front of the finger 26 ( Figure 3) and below the latter.
  • FIG. 5 shows a variant of the means for driving the cover by the motor 20.
  • the output member of the reduction gear 22 is a wheel 28 on which is articulated one end of a link 29 the other end of which is articulated on a lug 30 secured to one end of the corresponding cheek 3.
  • the wheel 28 has on its periphery two cavities 31 diametrically opposed and there is provided a microswitch 32 in elastic engagement with one of the cavities 31, this microswitch having the function of controlling the start and stop of the motor 20 in the high positions and bottom of cover 2.

Description

La présente invention est relative aux machines à meuler les verres ophtalmiques.The present invention relates to machines for grinding ophthalmic lenses.

Une machine classique à meuler les verres ophtalmiques comprend habituellement une meule montée sur un axe horizontal rotatif et un chariot mobile sur un second axe horizontal parallèle au premier et situé au-dessus et en arrière de celui-ci.A conventional ophthalmic lens grinding machine usually comprises a grinding wheel mounted on a rotary horizontal axis and a carriage movable on a second horizontal axis parallel to the first and situated above and behind the latter.

Le chariot mobile a une forme générale en U; il est articulé sur son axe par sa partie intermédiaire de façon que ses ailes latérales parallèles s'étendent perpendiculairement à l'axe de la meule et au-dessus de celle-ci.The mobile carriage has a general U shape; it is articulated on its axis by its intermediate part so that its parallel lateral wings extend perpendicular to the axis of the grinding wheel and above it.

Entre les ailes latérales du chariot en U s'étend un axe en deux parties entre lesquelles est serré un verre à tailler, et un gabarit est monté sur une extrémité de l'axe portant le verre et prend appui sur une touche, ou butée; le chariot est mobile autour de son axe de support et le long de celui-ci pour amener le verre à tailler en contact avec la meule, et le gabarit en contact avec la touche.Between the lateral wings of the U-shaped carriage extends an axis in two parts between which a glass to be cut is clamped, and a jig is mounted on one end of the axis carrying the glass and bears on a key, or stop; the carriage is movable around its support axis and along it to bring the glass to be cut into contact with the grinding wheel, and the template in contact with the key.

Une rampe d'arrosage projette de l'eau sur la meule et le verre à tailler.A watering ramp projects water onto the grinding wheel and the glass to be cut.

Au cours de l'opération de meulage l'eau projetée forme un brouillard et des éclaboussures dont l'opé- rateurest protégé par un masque transparent disposé devant la meule et le verre, ou par un couvercle amovible et rabattable, également transparent.During the grinding operation, the sprayed water forms a mist and splashes, the operator of which is protected by a transparent mask placed in front of the grinding wheel and the glass, or by a removable and hinged cover, also transparent.

L'invention a pour but de réaliser une machine à meuler du type précité comportant des moyens de protection de l'opérateur contre les éclaboussures, ces moyens s'ouvrant automatiquement et provoquant simultanément le relevage du chariot lorsque la taille du verre est achevée.The object of the invention is to produce a grinding machine of the aforementioned type comprising means for protecting the operator against splashing, these means opening automatically and simultaneously causing the lifting of the carriage when the size of the glass is completed.

L'invention a pour objet à cet effet une machine à meuler les verres ophtalmiques, comprenant un carter ayant dans son ensemble une forme à peu près parallélépipédique ouvert à sa partie supérieure et logeant une meule entraînée en rotation sur un premier axe horizontal, un chariot de forme générale en U articulé sur un second axe horizontal qui est fixe et situé au-dessus et en arrière du premier axe et portant entre ses ailes latérales un axe en deux parties serrant entre elles le verre à tailler, ledit chariot étant mobile autour dudit second axe et le long de celui-ci et lesdites ailes appliquant le verre sur la meule par gravité, machine caractérisée en ce qu'elle comprend un capot ayant un panneau supérieur articulé monté oscillant dans le carter entre une position haute, de fermeture, et une position basse, d'ouverture, un moteur pour entraîner ledit capot, et des premiers et des seconds moyens pour relever le chariot et ledit panneau, respectivement lorsque le capot passe de sa position haute à sa position basse.The subject of the invention is to this end a machine for grinding ophthalmic lenses, comprising a casing having as a whole a roughly parallelepiped shape open at its upper part and housing a grinding wheel driven in rotation on a first horizontal axis, a carriage generally U-shaped articulated on a second horizontal axis which is fixed and located above and behind the first axis and carrying between its lateral wings an axis in two parts clamping between them the glass to be cut, said carriage being movable around said second axis and along it and said wings applying the glass to the grinding wheel by gravity, machine characterized in that it comprises a cover having an articulated upper panel mounted oscillating in the casing between a high, closed position, and a low, open position, a motor for driving said cover, and first and second means for raising the carriage and said panel, respectively lo rsque the cover moves from its high position to its low position.

Suivant une autre caractéristique de l'invention, le capot comporte deux joues latérales parallèles réunies par une partie intermédiaire sur un bord de laquelle est articulé ledit panneau supérieur, celui-ci étant transparent.According to another characteristic of the invention, the cover comprises two parallel lateral cheeks joined by an intermediate part on an edge of which is articulated said upper panel, the latter being transparent.

D'une façon avantageuse le capot est monté oscillant sur des tourillons solidaires des côtés du carter et engagés dans des trous prévus dans les extrémités desdites joues.Advantageously, the cover is mounted oscillating on pins attached to the sides of the casing and engaged in holes provided in the ends of said cheeks.

Suivant un mode de réalisation, le moteur d'entraînement du capot est solidaire du carter et entraîne, par l'intermédiaire d'un réducteur, un pignon en prise avec un secteur denté ou autre crémaillère sur l'une desdites joues.According to one embodiment, the hood drive motor is integral with the housing and drives, via a reduction gear, a pinion engaged with a toothed sector or other rack on one of said cheeks.

Suivant un autre mode de réalisation, le moteur d'entraînement du capot est solidaire du carter et entraîne, par l'intermédiaire d'un réducteur, une biellette articulée sur un levier solidaire dudit capot.According to another embodiment, the hood drive motor is secured to the casing and drives, via a reduction gear, a link articulated on a lever secured to said hood.

De préférence il est prévu des microcontacts de fin de course pour arrêter ledit moteur dans les positions haute et basse du capot.Preferably, end-of-travel microswitches are provided to stop said motor in the top and bottom positions of the hood.

Suivant encore une autre caractéristique de l'invention, lesdits moyens pour relever le chariot lorsque le capot passe dans sa position basse comprennent une saillie sur le capot, coopérant avec une saillie opposée sur le chariot.According to yet another characteristic of the invention, said means for raising the carriage when the cover passes into its low position comprise a projection on the cover, cooperating with an opposite projection on the carriage.

Suivant encore une autre caractéristique, lesdits moyens pour relever le panneau supérieur comprennent au moins une butée portée par un bras solidaire dudit carter.According to yet another characteristic, said means for raising the upper panel comprise at least one stop carried by an arm secured to said casing.

De préférence ledit bras est constitué par un prolongement vertical fixe d'un support de l'axe portant le chariot.Preferably said arm is constituted by a fixed vertical extension of a support of the axis carrying the carriage.

D'une façon commode le moteur d'entraînement du capot est commandé par un interrupteur monté sur le carter.The hood drive motor is conveniently controlled by a switch mounted on the housing.

La description qui va suivre, en regard des dessins annexés à titre d'exemples non limitatifs, permettra de bien comprendre comment l'invention peut être mise en pratique.The description which follows, with reference to the accompanying drawings by way of nonlimiting examples, will make it possible to understand clearly how the invention can be put into practice.

La figure 1 est une vue en perspective d'une machine à meuler les verres ophtalmiques suivant l'invention avec son capot en position haute, de fermeture.Figure 1 is a perspective view of a machine for grinding ophthalmic lenses according to the invention with its cover in the high position, closed.

La figure 2 montre la même machine, en perspective, mais avec son capot en position basse, d'ouverture.Figure 2 shows the same machine, in perspective, but with its cover in the low, open position.

La figure 3 est une vue en élévation latérale et en coupe de la machine à meuler représentée aux figures 1 et 2.FIG. 3 is a side elevation view in section of the grinding machine shown in FIGS. 1 and 2.

La figure 4 en est une vue en coupe suivant la ligne IV IV de la figure 3.FIG. 4 is a sectional view along line IV IV of FIG. 3.

La figure 5 est une vue de détail d'une variante des moyens d'entraînement du capot.Figure 5 is a detail view of a variant of the hood drive means.

En se référant aux figures 1 et 2, on a représenté une machine à meuler les verres ophtalmiques suivant l'invention, qui comprend un carter 1 de forme générale parallélépipédique (suivant l'exemple représenté) ouvert à sa partie supérieure, logeant le mécanisme de la machine et dans lequel est articulé un capot 2 comportant deux joues latérales parallèles 3 reliées par une partie intermédiaire 4 sur un bord supérieur de laquelle est articulé un panneau transparent 5.Referring to Figures 1 and 2, there is shown a machine for grinding ophthalmic lenses according to the invention, which comprises a casing 1 of generally parallelepipedal shape (according to the example shown) open at its upper part, housing the mechanism the machine and in which a cover 2 is articulated comprising two parallel lateral cheeks 3 connected by an intermediate part 4 on an upper edge of which is articulated a transparent panel 5.

Comme connu en soi le mécanisme de la machine comprend un premier axe horizontal 6, rotatif, portant une meule 7 et entraîné par un moteur 8 porté par un support 9. De préférence la meule 7 tourne dans la partie inférieure, ouverte vers le haut, d'un carter secondaire 10 en deux parties, dans un but qui sera indiqué dans la suite.As known per se, the machine mechanism comprises a first horizontal axis 6, rotary, carrying a grinding wheel 7 and driven by a motor 8 carried by a support 9. Preferably the grinding wheel 7 rotates in the lower part, open upwards, a secondary casing 10 in two parts, for a purpose which will be indicated below.

En arrière de la meule 7 et de son moteur d'entraînement 8 est monté un second axe horizontal 11, fixe, porté par deux supports 12 et sur lequel est articulé un chariot 13 ayant dans son ensemble une forme en U.Behind the grinding wheel 7 and its drive motor 8 is mounted a second horizontal axis 11, fixed, carried by two supports 12 and on which is articulated a carriage 13 having as a whole a U shape.

Entre ses ailes latérales, le chariot 13 porte un axe 14 en deux parties entre lesquelles est serré un verre à meuler 15. L'agencement est tel que le chariot 13 peut osciller autour de l'axe 11 en arrière et au-dessus de la meule 7 afin d'appliquer le verre à meuler sur celle-ci, de haut en bas par gravité. Sur un prolongement de l'axe 14 est monté un gabarit 16, extérieurement au chariot 13, ce gabarit venant également s'appliquer de haut en bas sur une touche, ou butée, 17.Between its lateral wings, the carriage 13 carries an axis 14 in two parts between which a glass for grinding is clamped 15. The arrangement is such that the carriage 13 can oscillate around the axis 11 behind and above the grinding wheel 7 in order to apply the glass to be ground on it, from top to bottom by gravity. On a continuation of the axis 14 is mounted a template 16, externally to the carriage 13, this template also being applied from top to bottom on a key, or stop, 17.

D'une façon avantageuse le verre 15 tourne, entre les ailes du chariot 13, dans la partie supérieure 10', ouverte vers le bas, du carter secondaire 10.Advantageously, the glass 15 rotates, between the wings of the carriage 13, in the upper part 10 ′, open downwards, of the secondary casing 10.

Le chariot 13 peut ainsi osciller autour de l'axe 11 entre une position basse représentée à la figure 4 dans laquelle le verre 15 est en contact avec la meule 7 et/ou le gabarit 16 avec la touche 17, et une position haute représentée à la figure 3 dans laquelle le verre est espacé de la meule. Dans ces deux positions, le chariot 13 - et la partie 10' du capot 10 - font saillie vers le haut, à l'extérieur du carter 1.The carriage 13 can thus oscillate around the axis 11 between a low position shown in FIG. 4 in which the glass 15 is in contact with the grinding wheel 7 and / or the template 16 with the key 17, and a high position shown at Figure 3 in which the glass is spaced from the grinding wheel. In these two positions, the carriage 13 - and the part 10 'of the cover 10 - protrude upwards, outside the casing 1.

Enfin, une rampe 18 de distribution d'eau est montée dans le capot 10 et est reliée à une source d'alimentation afin de projeter un jet d'eau sur la meule et sur le bord du verre à meuler 15.Finally, a water distribution ramp 18 is mounted in the cover 10 and is connected to a power source in order to project a jet of water on the grinding wheel and on the edge of the glass to be ground 15.

Suivant l'invention la partie intermédiaire 4 du capot 2 est disposée parallèlement à l'axe 11 et du côté opposé à la meule par rapport à cet axe, et le capot 2 est articulé dans le carter 1 au moyen de deux tourillons 19 solidaires du carter 1 et qui s'étendent à travers des trous correspondants prévus aux extrémités des joues latérales du capot 1, comme représenté aux figures 3 et 4, le long des deux côtés opposés du carter 1.According to the invention the intermediate part 4 of the cover 2 is arranged parallel to the axis 11 and on the side opposite to the grinding wheel relative to this axis, and the cover 2 is articulated in the casing 1 by means of two pins 19 integral with the casing 1 and which extend through corresponding holes provided at the ends of the side flanges of the cover 1, as shown in FIGS. 3 and 4, along the two opposite sides of the casing 1.

Grâce à cet agencement, le capot peut osciller verticalement autour des tourillons 19 entre la position basse représentée en trait plein et la position haute représentée en trait mixte à la figure 4.Thanks to this arrangement, the cover can oscillate vertically around the pins 19 between the low position shown in solid lines and the high position shown in phantom in FIG. 4.

Pour effectuer ce mouvement, il est prévu un dispositif d'entraînement qui comprend un moteur 20, fixé sur une patte 21 solidaire de l'un des supports 12 de l'axe 11 du chariot et s'étendant vers la meule 7.To carry out this movement, a drive device is provided which comprises a motor 20, fixed on a lug 21 integral with one of the supports 12 of the axis 11 of the carriage and extending towards the grinding wheel 7.

Le moteur 20 entraîne tout d'abord une boîte de réduction 22 ayant un pignon de sortie qui attaque un secteur denté ou autre crémaillère 23 fixé sur la face interne de la joue 3 correspondante.The motor 20 first of all drives a reduction box 22 having an output pinion which attacks a toothed sector or other rack 23 fixed on the internal face of the corresponding cheek 3.

Lorsque le capot 2 se trouve en position haute, comme représenté en trait mixte, le panneau 5 est rabattu sous son propre poids par-dessus l'ensemble du mécanisme de la machine, en position de fermeture.When the cover 2 is in the high position, as shown in phantom, the panel 5 is folded under its own weight over the entire mechanism of the machine, in the closed position.

Pour assurer l'ouverture de ce panneau lorsque le capot passe en position basse, il est prévu sur chacun des supports 12 de l'axe 11 un bras 24 qui s'étend vers le haut, à peu près verticalement, et comporte à son extrémité supérieure un galet 25. Lorsque le capot descend vers sa position basse, le panneau 5 bute sur les galets 25 qui le maintiennent en position haute en le faisant osciller autour de son articulation sur le bord supérieur de la partie intermédiaire du capot 2.To ensure the opening of this panel when the cover passes into the low position, there is provided on each of the supports 12 of the axis 11 an arm 24 which extends upwards, approximately vertically, and has at its end upper a roller 25. When the cover descends to its low position, the panel 5 abuts on the rollers 25 which hold it in the high position by making it oscillate around its articulation on the upper edge of the intermediate part of the cover 2.

Enfin, il est prévu des moyens pour provoquer un relevage du chariot, à partir de sa position basse, en même temps que le capot 2 passe de sa position haute à sa position basse.Finally, means are provided for causing the carriage to be raised, from its low position, at the same time as the cover 2 passes from its high position to its low position.

Dans ce but il est prévu un doigt 26 en saillie sur la surface interne de la partie intermédiaire du capot 2, en direction de l'axe 11 du chariot, et un doigt correspondant 27 sur la partie arrière du chariot, en saillie vers la partie intermédiaire du capot et en face du doigt 26 (figure 3) et au-dessous de ce dernier.For this purpose there is provided a finger 26 projecting from the internal surface of the intermediate part of the cover 2, in the direction of the axis 11 of the carriage, and a corresponding finger 27 from the rear part of the carriage, projecting towards the part intermediate of the cover and in front of the finger 26 (Figure 3) and below the latter.

On comprend que lorsque le capot 2 descend, son doigt 26 vient en appui sur le doigt 27 du chariot, faisant ainsi basculer celui-ci vers le haut.It is understood that when the cover 2 descends, its finger 26 comes to bear on the finger 27 of the carriage, thereby causing the latter to tilt upwards.

On a représenté à la figure 5 une variante des moyens d'entraînement du capot par le moteur 20.FIG. 5 shows a variant of the means for driving the cover by the motor 20.

Dans cette variante, l'organe de sortie du réducteur 22 est une roue 28 sur laquelle est articulée une extrémité d'une biellette 29 dont l'autre extrémité est articulée sur une patte 30 solidaire d'une extrémité de la joue correspondante 3.In this variant, the output member of the reduction gear 22 is a wheel 28 on which is articulated one end of a link 29 the other end of which is articulated on a lug 30 secured to one end of the corresponding cheek 3.

La roue 28 comporte sur sa périphérie deux cavités 31 diamétralement opposées et il est prévu un microcontact 32 en prise élastiquement avec l'une des cavités 31, ce microcontact ayant pour fonction de commander la marche et l'arrêt du moteur 20 dans les positions haute et basse du capot 2.The wheel 28 has on its periphery two cavities 31 diametrically opposed and there is provided a microswitch 32 in elastic engagement with one of the cavities 31, this microswitch having the function of controlling the start and stop of the motor 20 in the high positions and bottom of cover 2.

Claims (7)

1. A machine for grinding ophthalmic lenses comprising a casing (1) of substantially parallelepipe- dal form open at its upper section and housing a grinding wheel (7) rotatable with a first horizontal axle (6), a generally U-shaped carriage (13) coupled to a second fixed horizontal axle (11) located above and behind the first axle (6) and an axle (14) in two parts, between which a lens (15) to be ground to size is gripped, carried between the side limbs of the carriage, the carriage being movable about and along the second axle and the side limbs applying the lens to the grinding wheel under gravity, the machine being characterised in that it comprises a cover (2) having an articulated upper panel (5) mounted to swing in the casing (1) between an upper, closed position and a lower, open position, a motor (20) for driving the cover, and means (26, 27 and 24, 25) for raising the carriage and the panel respectively when the cover moves from its upper to its lower position, this means for raising the carriage (13) when the cover (2) moves to its lower position comprising a projection (26) on the cover, which co-operates with an opposing projection (27) on the carriage, and the means for raising the upper panel (5) comprising at least one stop formed by a roller (25) carried by a vertical arm (24) fixed to the casing (1).
2. A grinding machine according to claim 1, characterised in that the cover (2) comprises two parallel side flanges (3) joined by an intermediate portion (4) on one edge of which the upper panel (5), which is transparent, is articulated.
3. A grinding machine according to claim 2, characterised in that the cover (2) is mounted to swing on pivots (19) fixed to the sides of the casing (1) and engaging in holes provided in the ends of the flanges (3).
4. A grinding machine according to claim 1, characterised in that the motor (20) which drives the cover (2) is fixed to the casing (1) and drives, through a gearbox (22), a pinion engaging with a toothed sector (23) or other rack on one of the flanges (3).
5. A grinding machine according to claim 1, characterised in that the motor (20) which drives the cover (2) is fixed to the casing (1) and drives, through a gearbox (22), a link (29) articulated to an arm (30) fixed to the cover (2).
6. A grinding machine according to claim 5 characterised in that limit position microswitches (32) are provided to stop the motor(20) in the upper and lower positions of the cover (2).
7. A grinding machine according to claim 1, characterised in that the arm (24) is provided by a fixed, vertical extension of a support (12) for the axle (11) carrying the carriage (13).
EP89401379A 1988-06-14 1989-05-19 Grinding machines Expired - Lifetime EP0347270B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807915A FR2632555B1 (en) 1988-06-14 1988-06-14 IMPROVEMENTS IN GRINDING MACHINES
FR8807915 1988-06-14

Publications (2)

Publication Number Publication Date
EP0347270A1 EP0347270A1 (en) 1989-12-20
EP0347270B1 true EP0347270B1 (en) 1992-12-02

Family

ID=9367254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401379A Expired - Lifetime EP0347270B1 (en) 1988-06-14 1989-05-19 Grinding machines

Country Status (6)

Country Link
US (1) US4908991A (en)
EP (1) EP0347270B1 (en)
JP (1) JPH0698564B2 (en)
DE (2) DE347270T1 (en)
ES (1) ES2012743T3 (en)
FR (1) FR2632555B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648244B1 (en) * 1989-06-07 1992-04-17 Briot Int MACHINE FOR GRINDING OPTICAL CORRECTION LENSES
US5781931A (en) * 1997-11-03 1998-07-21 Lee; Arnold Yoonho Method for making ergonomic gloves
WO2013090513A1 (en) 2011-12-14 2013-06-20 Federal-Mogul Corporation Windscreen wiper device
US10307881B2 (en) * 2017-02-22 2019-06-04 National Optronics, Inc. Ophthalmic lens processing apparatus with improved user accessibility

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1510824A (en) * 1966-03-07 1968-01-26 Improvement in machines for overflowing, bevelling and grooving spectacle lenses
US3568370A (en) * 1968-11-12 1971-03-09 Textron Inc Lens cribber
FR2385491A1 (en) * 1977-04-01 1978-10-27 Essilor Int OPHTHALMIC LENS CLEANER-BEVELER
JPS5845855A (en) * 1981-09-11 1983-03-17 Seikosha Co Ltd Lens edge face working device
DE3316619A1 (en) * 1983-05-06 1984-11-08 Otto 4010 Hilden Helbrecht GRINDING MACHINE FOR THE EDGES OF EYE GLASSES
FR2570013B1 (en) * 1984-09-11 1987-02-13 Essilor Int GRINDING MACHINE FOR THE GUIDED OR FREE BEVELING OR GROOVING OF AN OPHTHALMIC LENS
US4779603A (en) * 1986-03-12 1988-10-25 Crocetti Louis C Brick saw container
DE3608957C2 (en) * 1986-03-18 1994-02-10 Wernicke & Co Gmbh Spectacle lens edge grinding machine

Also Published As

Publication number Publication date
DE68903691D1 (en) 1993-01-14
US4908991A (en) 1990-03-20
JPH0236061A (en) 1990-02-06
FR2632555A1 (en) 1989-12-15
JPH0698564B2 (en) 1994-12-07
DE347270T1 (en) 1990-05-03
EP0347270A1 (en) 1989-12-20
ES2012743T3 (en) 1993-06-01
FR2632555B1 (en) 1990-09-28
DE68903691T2 (en) 1993-04-15
ES2012743A4 (en) 1990-04-16

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