EP0483000A1 - Vorrichtung zum Aufbringen eines Halteteils auf Brillengläser mit einem verschliessbaren Arm - Google Patents

Vorrichtung zum Aufbringen eines Halteteils auf Brillengläser mit einem verschliessbaren Arm Download PDF

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Publication number
EP0483000A1
EP0483000A1 EP91402824A EP91402824A EP0483000A1 EP 0483000 A1 EP0483000 A1 EP 0483000A1 EP 91402824 A EP91402824 A EP 91402824A EP 91402824 A EP91402824 A EP 91402824A EP 0483000 A1 EP0483000 A1 EP 0483000A1
Authority
EP
European Patent Office
Prior art keywords
arm
gliding
carriage
pawl
carried
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
EP91402824A
Other languages
English (en)
French (fr)
Other versions
EP0483000B1 (de
Inventor
Jean-Louis Cariou
Christian Joncour
Claude Borius
Philippe Clara
François Brule
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 EP0483000A1 publication Critical patent/EP0483000A1/de
Application granted granted Critical
Publication of EP0483000B1 publication Critical patent/EP0483000B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices

Definitions

  • the present invention relates generally to the fitting, on a lens of glasses to work, and for example to overflow, of a block, said here for simple convenience gripping block, which, adapted to not adhere to such spectacle lens that temporarily, for example by means of a suction cup, is intended to allow it to be put in place, and locked in position, on a machine suitable for the work to be performed.
  • the present invention relates to the case where, according to provisions of the type of those described in the French patent application, not yet published, filed by the applicant on September 29, 1989 under No. 89 12735, the glantage device thus implemented comprises, for the installation of a gripping block on a spectacle lens arranged in standby on a plate carried by a frame, a gliding arm, which is adapted to receive, in a removable manner, the gripping block to be placed, a carriage, on which the sliding arm is pivotally mounted between two extreme positions, one raised, loading, the other tilted, laying, and which is itself movable rectilinearly on the frame between two extreme positions, one, moved back, at rest, the other, advanced, at the end of the race, of the drive means, and, acting between said drive means and at least any one of the that constitute the arm and the carriage, a transmission from which it follows that, at least when the carriage is in the vicinity of its end-of-travel position, the sliding arm is in the tilted
  • the pivoting of the sliding arm and the movement of the carriage advantageously result from the same movement, induced by the drive means, the sliding arm passing to its tilted laying position before the carriage moves in the direction of its advanced end-of-travel position or during this movement, and returning normally in the raised loading position after the carriage returns to its retracted rest position.
  • the present invention generally relates to a provision making it possible to avoid this drawback and leading to other advantages.
  • a sliding device of the kind comprising, for the installation of a gripping block on a spectacle lens arranged in standby on a plate carried by a frame, a sliding arm, which is suitable to receive, in a removable manner, the gripping block to be placed, a carriage, on which the sliding arm is pivotally mounted between two extreme positions, one, raised, of loading, the other, tilted, of laying, and which is itself mounted movable in a rectilinear manner on the frame between two extreme positions, one, remote, at rest, the other, advanced, end of stroke, drive means, and, intervening between said means drive and any at least of the elements that constitute the sliding arm and the carriage, a transmission which results in that, at least when the carriage is in the vicinity of its end position, the sliding arm is in the tilted installation position, this dispositi f of gliding being generally characterized in that, between the gliding arm and the carriage, there are latching means specific to a disengageable locking of the sliding arm
  • latching means extend their effects throughout the movement, in one direction or the other, of the carriage.
  • the installation of the gripping block can advantageously be done in a particularly rigorous manner, in a position duly centered relative to the spectacle lens to be fitted.
  • the gliding device 10 comprises, for the installation of a gripping block, not shown, on a spectacle lens 11 placed waiting on a plate 12, as shown schematically in broken lines in Figure 4, a gliding arm 13, which is adapted to receive, removably, this gripping block, presenting for this purpose a receptacle 14, Figures 1 and 3, a carriage 15, on which the arm glantage 13 is pivotally mounted between two extreme positions, one, raised, loading, Figures 1 to 4, the other, tilted, laying, Figure 9, and which is itself mounted movable rectilinearly on a frame 16, between two extreme positions, one, moved back, at rest, FIGS.
  • the frame 16 is made, in a particularly rigid manner, of two shells 18, which, duly facing one another, along a plane P1 containing l the laying axis A1, that is to say the axis along which the gripping block must be laid, are from place to place duly coupled to one another by tie rods 20.
  • this frame 16 comprises a base 21, by which it can be attached directly, or indirectly, by means of spacers on any support, for example the frame of a contour reading device, a head 22, on which the sliding arm 13 and the carriage 15 intervene, and, connecting this base 21 and this head 22 to each other, a body 23.
  • the gliding arm 13 is in the form of a stirrup.
  • the sliding arm 13 also carries, in its middle part 25, two ejectors 27, which, each arranged respectively on either side of the receptacle 14, are intended to come to bear on the spectacle lens 11 for the maintenance of the latter on the plate 12 during the return movement of the carriage 15 from its advanced end-of-travel position to its retracted position of rest.
  • the carriage 15 is reduced to two slides 28, one per lateral arm 26 of the glider arm 13, and these slides 28, which each have a generally rectangular outline, are each individually mounted mobile in two grooves 30 provided for this purpose on the frame 16.
  • these grooves 30 each affect respectively the shells 18 constituting this frame 16, on the outer surface thereof, and for the retention of the slides 28, it is reported, on these shells 18, on either side grooves 30, plates 31 which partially close them.
  • each of the lateral arms 26 of this sliding arm 13 locally forms a hub 32 by which it is engaged in journalling, with the interposition of a bearing 33, on a cylindrical boss 34 provided locally projecting for this purpose on the corresponding slide 28.
  • a screw 36 ensures the security of the corresponding assembly.
  • A2 be the pivot axis of the gliding arm 13 on the carriage 15.
  • latching means specific to a disengageable locking of this sliding arm 13 on this carriage 15 when it is in the tilted installation position.
  • these latching means comprise at least one pawl 38, which, carried by any of the elements that constitute the gliding arm 13 and the carriage 15, is pivotally mounted on it, a lug 40, which, projecting from the other of these elements, is interposed on the path of the pawl 38, elastic return means, explained later, which permanently urge the pawl 38 towards an active position for which, as shown in Figure 9, it is capable of hooking on the lug 40, and, for retaining the pawl 38 in the inactive position, away from the lug 40, when, as shown in Figures 1 to 4 , the carriage 15 is in the retracted rest position, a stop 41 which, carried by the frame 16, is also interposed on the path of the pawl 38, on the other side of it relative to the lug 40.
  • the pawl 38 is carried by the carriage 15, the associated lug 40 protrudes from the gliding arm 13, and there are thus two pawls 38, one for each lateral arm 26 of the sliding arm 13, and, in correspondence, two lugs 40.
  • A3 be the pivot axis of the pawls 38 on the carriage 15.
  • the pawls 38 are each mounted adjustable in position on the carriage 15, perpendicular to the laying plane P2, that is to say to the plane containing the direction of movement D of this carriage 15 and the pivot axis A2 of the sliding arm 13.
  • the two pawls 38 are each respectively carried by the two slides 28 constituting the carriage 15.
  • lever arm 42 which, at its end, has a square return 43, with a substantially straight flank, by which they are able to be hooked onto the associated lug 40, a central part 44, by which they are pivotally engaged on a hub 45, duly shouldered, carried by the corresponding slide 28, and a lever arm 46, which, aligned with the lever lever 42 above, extends on the other side of the middle portion 44 relative thereto, and by which they are adapted to be actuated by the corresponding stop 41.
  • this boss 47 has a hole 48 elongated in a buttonhole perpendicular to the laying plane P2, FIG. 5.
  • a threaded tie rod 50, with screw and nut, ensures the safety of the corresponding assembly.
  • the elastic return means associated with such a pawl 38 are constituted by a torsion spring 52, the median torsion part of which is engaged on the hub 45 and one arm of which is hooked onto the pawl 38 while the other is hooked on the corresponding slide 28.
  • the lug 40 associated with each of the pawls 38 is in the form of a boss projecting from the corresponding lateral arm 26 of the sliding arm 13, and, more precisely, on an extension 54 thereof.
  • this lug 40 has a rectangular cross section, with two faces parallel to the laying plane P2 and two faces perpendicular thereto.
  • the carriage 15 To support the gliding arm 13 in its tilted installation position, the carriage 15 carries a stop 56 adjustable in position perpendicular to the installation plane P2.
  • this stop 56 is constituted by the end of a screw passing, perpendicular to this laying plane P2, the boss 47 of one of the slides 28 constituting the carriage 15.
  • the gliding arm 13 is brought into abutment against this stop 56, as shown in FIG. 9.
  • the gliding arm 13 extends very exactly along the laying axis A1, for a properly centered laying of the gripping block to be deposited.
  • the pawls 38 are then hooked onto the lugs 40, and, according to the methods described above, their adjustment is made in position so that the return to square 43 of their lever arm 42 is very exactly in contact, by its substantially straight flank of the corresponding face of these lugs 40.
  • the gliding arm 13 is firmly locked between two supports, one provided by the stop 56, the other provided by the pawls 38.
  • the stop 41 associated with each of the pawls 38 is simply constituted by a pin carried by the corresponding shell 18 of the frame 16.
  • the drive means used for tilting the sliding arm 13 and moving the carriage 15 comprise an electric motor 60, housed in the frame 16.
  • the transmission 17 intervening between this motor 60 and any one of the elements that constitute the sliding arm 13 and the carriage 15 is, overall, of the belt and pinion type.
  • the word belt must be understood in the broad sense, covering both cables and actual belts, and, likewise, the pinions can be constituted by simple pulleys.
  • the transmission 17 implemented in the embodiment shown comprises, on the one hand, at least one belt 61, which is in practice a toothed belt, and which is passed in endless loop on two pinions 62, 63 , one wedged on the output shaft of the motor 60, the other rotatably mounted on the frame 16, and, on the other hand, at least one cable 64, which, generally forming an endless loop, is locally passed looped on a pulley 65 fixed in rotation on the preceding pinion 63, making in practice several turns on this pulley 65.
  • the assembly extends over one of the sides of the frame 16.
  • the cable 64 is also passed locally in a loop on a deflection member 66 carried by the sliding arm 13, and, more precisely, by the corresponding lateral arm 26 thereof.
  • this return member 66 is wedged on the sliding arm 13.
  • This return member 66 is therefore coaxial with the pivot axis A2 of the sliding arm 13.
  • the two ends 68, 69 of the cable 64 are both coupled to the sliding arm 16, for example using a pin 67, after passing over the return member 66.
  • the cable 64 extends parallel to the direction of movement D of the carriage 15 on either side of the return member 66.
  • the corresponding strands extend on the same side of the deflection member 66, being both in a plane parallel to the laying plane P2, in the immediate vicinity of this laying plane P2 .
  • the force to which the carriage 15 is subjected, by means of the sliding arm 13, due to the cable 64, therefore extends as close as possible to the direction of movement D of this carriage 15, parallel to the latter, for the benefit of the overall performance.
  • the cable 64 passes over other return members 70, 71, 72, all carried by the frame 16.
  • the two return members 70, 71 are aligned with the return member 66 carried by the gliding arm 13, being each respectively arranged on either side thereof.
  • the deflection member 70 which is disposed opposite the drive pulley 65, is in practice carried by an arm 74 attached to the frame 16, on the one hand, to take account of the transverse offset induced by this pulley d 'drive 65 due to the multiple turns on it of the cable 64, and, on the other hand, to be spaced from the frame 16 and thus allow the passage between it and him of the glider arm 13 when the latter is in position tilted installation.
  • the return member 71 is itself directly carried by the frame 16.
  • the return member 72 As for the return member 72, it is carried by a slide 75 mounted adjustable in position on the frame 16 to form a tensioner.
  • the cable 64 generally forms a rectangular loop, at the angles of which extend, in addition to the drive pulley 65, the return members 70, 71, 72.
  • these return members 70, 71, 72 are each constituted by a rotary pulley.
  • the cable 64 thus used extends in two planes P3, P4, which, both perpendicular to the laying plane P2, are offset l relative to each other along the pivot axis A2 of the gliding arm 13, the passage from one to the other of these planes P3, P4 taking place, on the one hand, on the member of return 66 carried by the gliding arm 13, and, on the other hand, on the drive pulley 65 on which the cable 64 makes several turns.
  • the two strands of the cable 64 bypassing such a return member 70, 71, 72 advantageously extend one and the other in a plane perpendicular to the axis of rotation of this organ of reference 70, 71, 72, for the benefit of a minimization of the corresponding friction, and therefore of the longevity of the cable 64.
  • two cables 64 are used on either side of the frame 16, one per lateral arm 26 of the glider arm 13, and, likewise, in the embodiment shown, it is put using two toothed belts 61.
  • the drive means associated with the sliding arm 13 and the carriage 15 comprise, in addition to the motor 60, elastic means intended to overcome, for the rest position of the carriage 15, the elastic force due to the springs 52 constituting the elastic return means of the pawls 38, and thus to allow the effective release of the sliding arm 13.
  • At least one spring 80 which, coupled, at one of its ends, to a lug 81 provided for this purpose projecting from the frame 16, of a side of the latter, is coupled, at its other end, to the corresponding slide 28 of the carriage 15, by means of the screw forming the stop 56 carried by this slide 28, after passing over two return members 83, 84, which are both rotatably mounted on the frame 16, and one of which, the return member 84, is coaxial with the return member 71 of the corresponding cable 64.
  • two springs 80 can be provided, being arranged, each respectively, on either side of the frame 16.
  • a stop 85 is provided on the frame 16.
  • a stop 86 is provided on the frame 16.
  • the gliding arm 13 When the gliding arm 13 is thus in the raised loading position, it acts on a microswitch 88 to which the power supply to the electric motor 60 is controlled.
  • lighting means comprising a lamp 89 with which it is associated, to direct its beam on the plate 12, a deflection mirror, not visible in the figures , and a lens 90.
  • the engine 60 is started.
  • the cables 64 duly driven by the toothed belts 61, cause a rotation of the gliding arm 13 by a quarter of a turn, which results in the passage in the tilted position of laying it , with the support of its lateral arms 26 on the corresponding stops 56 provided for them on the carriage 15.
  • the cables 64 then cause the carriage 15 to move in the direction of its end-of-travel position.
  • the barycenter of the faces in contact between the square return 43 of these pawls 38 and the lugs 40 of the gliding arm 13 is then located beyond the pivot axis A3 of these pawls 38 by compared to their engagement movement on these lugs 40.
  • the movement of the carriage 15 continues until the gripping block carried by the gliding arm 13 is effectively applied to the spectacle lens 11 to be fitted.
  • the installation of the gripping block is advantageously carried out under rigorously controlled and safe conditions.
  • the sliding arm 13 advantageously remains in all certainty in the tilted installation position, without the risk of a premature return to the raised loading position.
  • the gliding arm 13 subjected to the stress of the cables 64 passes from its tilted laying position to its raised loading position, until its lateral arms 26 press against the corresponding stops 86.
  • the sliding arm 13 actuates the microswitch 88, thereby causing the motor 60 to stop.
  • the sliding arm carries with it the spectacle lens when the carriage returns from its end-of-travel position to its rest position, and the initial loading raised position of this gliding arm then becomes for this spectacle lens an unloading position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
EP91402824A 1990-10-25 1991-10-23 Vorrichtung zum Aufbringen eines Halteteils auf Brillengläser mit einem verschliessbaren Arm Expired - Lifetime EP0483000B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9013233A FR2668410B1 (fr) 1990-10-25 1990-10-25 Dispositif de glantage a bras de glantage verrouillable.
FR9013233 1990-10-25

Publications (2)

Publication Number Publication Date
EP0483000A1 true EP0483000A1 (de) 1992-04-29
EP0483000B1 EP0483000B1 (de) 1994-02-16

Family

ID=9401557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402824A Expired - Lifetime EP0483000B1 (de) 1990-10-25 1991-10-23 Vorrichtung zum Aufbringen eines Halteteils auf Brillengläser mit einem verschliessbaren Arm

Country Status (6)

Country Link
US (1) US5209026A (de)
EP (1) EP0483000B1 (de)
JP (1) JPH04264424A (de)
DE (1) DE69101208T2 (de)
ES (1) ES2051572T3 (de)
FR (1) FR2668410B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5498200A (en) * 1994-08-12 1996-03-12 Wernicke & Co. Gmbh Device for parallex-free centering of a blank for a glass lens for spectacles and for providing markings and/or attaching a holder before inserting the blank into a grinding machine for blanks for glass lenses
DE19505524C2 (de) * 1995-02-18 1996-12-19 Wernicke & Co Gmbh Vorrichtung zum Zentrieren eines Brillenglasrohlings und Anbringen eines Halteteils auf einer optischen Oberfläche des Brillenglasrohlings
US6869333B2 (en) 2002-09-11 2005-03-22 National Optronics, Inc. Lens blank alignment and blocking device and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580507A (en) * 1948-01-12 1952-01-01 American Optical Corp Lens blocking device
FR2608492A1 (fr) * 1986-12-23 1988-06-24 Essilor Int Dispositif de glantage pour lentille ophtalmique et appareil de centrage comportant un tel dispositif de glantage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3276625D1 (en) * 1981-12-23 1987-07-30 Wernicke & Co Gmbh An apparatus for centering the lenses of spectacles and for securing a holding member for the lenses
US4479332A (en) * 1982-09-16 1984-10-30 Ait Industries, Inc. Lens blocker and method
FR2652528A1 (fr) * 1989-09-29 1991-04-05 Essilor Int Dispositif de glantage.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580507A (en) * 1948-01-12 1952-01-01 American Optical Corp Lens blocking device
FR2608492A1 (fr) * 1986-12-23 1988-06-24 Essilor Int Dispositif de glantage pour lentille ophtalmique et appareil de centrage comportant un tel dispositif de glantage

Also Published As

Publication number Publication date
DE69101208D1 (de) 1994-03-24
DE69101208T2 (de) 1994-05-26
US5209026A (en) 1993-05-11
EP0483000B1 (de) 1994-02-16
FR2668410B1 (fr) 1993-01-22
FR2668410A1 (fr) 1992-04-30
ES2051572T3 (es) 1994-06-16
JPH04264424A (ja) 1992-09-21

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