EP0245726B1 - Device for machining the edge of a spectacle glass - Google Patents

Device for machining the edge of a spectacle glass Download PDF

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Publication number
EP0245726B1
EP0245726B1 EP87106371A EP87106371A EP0245726B1 EP 0245726 B1 EP0245726 B1 EP 0245726B1 EP 87106371 A EP87106371 A EP 87106371A EP 87106371 A EP87106371 A EP 87106371A EP 0245726 B1 EP0245726 B1 EP 0245726B1
Authority
EP
European Patent Office
Prior art keywords
housing
bulge
motor
arm
milling cutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87106371A
Other languages
German (de)
French (fr)
Other versions
EP0245726A3 (en
EP0245726A2 (en
Inventor
Günter Barwasser
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.)
Wernicke and Co GmbH
Original Assignee
Wernicke and Co GmbH
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 Wernicke and Co GmbH filed Critical Wernicke and Co GmbH
Publication of EP0245726A2 publication Critical patent/EP0245726A2/en
Publication of EP0245726A3 publication Critical patent/EP0245726A3/en
Application granted granted Critical
Publication of EP0245726B1 publication Critical patent/EP0245726B1/en
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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30392—Milling with means to protect operative or machine [e.g., guard, safety device, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/304144—Means to trim edge

Definitions

  • the invention relates to a device for processing the edge of a spectacle lens with two horizontal half-shafts holding the spectacle lens between them and with a rotating edge processing tool driven by a motor, which is arranged in a stationary housing provided with a pivotable cover, in contrast to the tool and Motor can be adjusted in two horizontal coordinates.
  • US-OS-3446943 discloses a device according to the preamble of claim 1.
  • US-A-3 087 285 discloses an apparatus for machining a lens rim, in which the machining tool is a milling cutter.
  • the spectacle lens held between two horizontal half-waves can be brought into its working position on the milling cutter and removed from it by moving the device part holding the spectacle lens with the aid of a parallelogram linkage relative to the stationary milling cutter.
  • a housing protecting the milling cutter against unintentional contact or another safety device is not disclosed, as is the milling cutter itself, which is immovably mounted in a stationary manner.
  • the object of the invention is to provide a high-performance edge processing machine for spectacle lenses, in which, above all, the safety of the operator is guaranteed. This is to be achieved with structurally simple means that do not disturb the workflow.
  • the advantage that can be achieved with the device according to the invention is that the user is protected against damage and injuries to the trailing cutter after the milling process has ended and the cover has been opened before the cutter has come to a standstill.
  • security options against such damage and injury e.g. the opening flap of the housing could only be opened when the milling cutter has come to a standstill.
  • this safety measure is often prevented by the fact that the housing can be opened when the milling cutter is still rotating.
  • the device according to the invention essentially has the housing 1 and the motor part 2. Both parts are arranged together on a base plate G (Fig. 2).
  • the housing 1 has an essentially cubic shape and shows the two side walls 3, 4 and the front wall 5 facing the user and the rear wall 6 adjacent to the motor part 2.
  • the upper wall of the housing 1 is formed by a cover 8 which is pivotably arranged at 7 and can be opened and closed in the direction of the arrow P (FIG. 2).
  • the rear wall 6 facing the motor 23 has an initially vertical section 9, which is adjoined by an inclined section 10, which is continued in a section 11.
  • the rear wall 6 can also have any other training.
  • a bulge 13 is provided between the two rear wall sections 10, 11 in one vertical half of the housing 1 and approximately halfway up the same. This consists of an upper wall 14, a lower wall 15 and a rear wall 16. This bulge 13 has a certain size, which is explained in more detail in connection with the milling cutter described below as a machining tool and is approximately in the vertical longitudinal center plane of the housing located side open, however closed at the level of the side wall 4.
  • the second vertical half of the housing 1 has at the level of the bulge 13 on the rear wall 6, an opening 17, which has at least a height that corresponds to the vertical width of the cutter arm of the milling cutter, described below, so that this arm through the opening 17 in the Can protrude inside the housing 1 and is adjustable there in the horizontal direction.
  • the opening 17 is delimited upwards and downwards by the upper edge 18 and the lower edge 19.
  • the two half-shafts 21, 22 protrude through the two side walls 3, 4 and hold the spectacle lens B (FIGS. 2 and 3) between their adjacent ends in a known manner, the edge of which has to be machined.
  • the motor part 2 of the device shows a drive motor 23 on a support part 24, which may have the configuration according to FIG. 1 or according to FIG. 2, which is located horizontally and has a rectangular shape.
  • the first-mentioned section carries a shaft 28 which is located parallel to the motor shaft 29, carries the milling cutter 30 at its free end and over the belt or the cord 29a is driven by the shaft 29.
  • These parts have the size that allows the milling cutter to be able to fully enter the bulge 13 when not in use.
  • the configuration and arrangement of the arm 25, the milling cutter 30 and the bulge 13 is also such that the milling cutter can perform the necessary movements in two coordinate directions in the horizontal plane in relation to the spectacle lens.
  • the support part 24 carrying the motor 23 is adjustable in the manner of a cross slide in known guides 31, 32 in the two horizontal coordinate directions mentioned.
  • Such cross slide arrangements are known in spectacle lens edge grinding machines.
  • the motor 23 with the arm 25 and the milling cutter 30 arranged thereon can be moved such that the milling cutter can be moved from the machining position 30 into the non-use position 30 ′ in the bulge 13 and vice versa (FIG. 2 and 3).
  • the pivotable cover 8 is connected to a device (not shown), which can be mechanical or electrical and is known to the person skilled in the art, in such a way that the cover 8 can only be opened when the motor 23 has returned to the bulge and the milling cutter 30 was moved into its position 30 '. It is now essential that the motor 23 and the high-speed milling cutter 30 can still run without the operator being damaged when the cover 8 is opened.
  • the bulge 13 preferably has a hinge 33 for a flap 34 in front of the bulge 13.
  • This flap can be moved into its open or closed position depending on the movement of the arm 25, i.e. the flap can be pivoted up into position 34 so that it does not impede the machining process of milling cutter 30 when milling cutter 30 is extended from the bulge, but on the other hand assumes its position 34 'when milling cutter 30 is retracted into bulging 13 (position 30') and thus covers the milling cutter, which can run in the bulge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Milling Processes (AREA)
  • Eyeglasses (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Bearbeiten des Randes eines Brillenglases mit zwei zwischen sich das Brillenglas haltenden horizontalen Halbwellen und mit einem von einem Motor angetriebenen, rotierenden Randbearbeitungswerkzeug, das in einem ortsfesten, mit einem schwenkbaren Deckel versehenen Gehäuse angeordnet ist, demgegenüber das Werkzeug und sein Motor in zwei horizontale Koordinaten verstellbar sind.The invention relates to a device for processing the edge of a spectacle lens with two horizontal half-shafts holding the spectacle lens between them and with a rotating edge processing tool driven by a motor, which is arranged in a stationary housing provided with a pivotable cover, in contrast to the tool and Motor can be adjusted in two horizontal coordinates.

Der nächstkommende Stand der Technik wird durch die DE-OS-3446943 beschrieben, welche eine Vorrichtung gemäß obergriff des Anspruchs 1 offenbart. Die US-A-3 087 285 offenbart eine Vorrichtung zum Bearbeiten eines Brillenglasrandes, bei der das Bearbeitungswerkzeug ein Fräser ist. Hierbei kann das zwischen zwei horizontale Halbwellen gehaltene Brillenglas dadurch in seine Arbeitsstellung an dem Fräser gebracht und von diesem entfernt werden, daß das das Brillenglas haltende Vorrichtungsteil mit Hilfe eines Parallelogrammgestänges gegenüber dem ortsfest gelagerten Fräser bewegt wird. Ein den Fräser gegen unbeabsichtigte Berührung schützendes Gehäuse oder eine andere Sicherheitsvorrichtung ist nicht offenbart, wie auch der Fräser selbst unbeweglich ortsfest gelagert ist.The closest prior art is described by DE-OS-3446943, which discloses a device according to the preamble of claim 1. US-A-3 087 285 discloses an apparatus for machining a lens rim, in which the machining tool is a milling cutter. In this case, the spectacle lens held between two horizontal half-waves can be brought into its working position on the milling cutter and removed from it by moving the device part holding the spectacle lens with the aid of a parallelogram linkage relative to the stationary milling cutter. A housing protecting the milling cutter against unintentional contact or another safety device is not disclosed, as is the milling cutter itself, which is immovably mounted in a stationary manner.

Diesem Stand der Technik gegenüber besteht die Aufgabe der Erfindung darin, eine Randbearbeitungsmaschine hoher Leistung für Brillengläser zu schaffen, bei der vor allem die Sicherheit der Bedienungsperson gewährleistet ist. Dies soll mit konstruktiv einfachen und den Arbeitsablauf nicht störenden Mitteln erreicht werden.Compared to this prior art, the object of the invention is to provide a high-performance edge processing machine for spectacle lenses, in which, above all, the safety of the operator is guaranteed. This is to be achieved with structurally simple means that do not disturb the workflow.

Diese Aufgabe wird durch die in kennzeichnenden Teil des Anspruchs 1 enthaltenden Merkmale gelöst.This object is achieved by the features contained in the characterizing part of claim 1.

Die Merkmale der Unteransprüche dienen der Verbesserung und Weiterentwicklung der Merkmale des kennzeichnenden Teils des Hauptanspruches.The features of the subclaims serve to improve and further develop the features of the characterizing part of the main claim.

Der mit der erfindungsgemäßen Vorrichtung erreichbare Vorteil ist darin zu sehen, daß der Benutzer vor Schäden und Verletzungen des nachlaufenden Fräsers nach Beendigung des Fräsvorgangs und Öffnen des Deckels vor Stillstand des Fräsers geschützt ist. Zwar gibt es eine Vielzahl von Sicherungsmöglichkeiten gegen solche Schäden und Verletzungen, so z.B. könnte die Öffnungsklappe des Gehäuses erst geöffnet werden, wenn der Fräser zum Stillstand gekommen ist. Bekanntermaßen aber wird häufig diese Sicherungsmaßnahme dadurch unterbunden, daß das Gehäuse geöffnet werden kann, wenn der Fräser noch rotiert. Andererseits bedarf es jeweils einer Wartezeit zum Öffnen des Gehäuses und der Entnahme des bearbeiteten Brillenglases aus dem Gehäuse bis der hochtourig laufende Fräser endgültig zum Stillstand gekommen ist. Beide Nachteile werden mit konstruktiv einfachen Mitteln durch die Vorrichtung nach der Erfindung sicher vermieden.The advantage that can be achieved with the device according to the invention is that the user is protected against damage and injuries to the trailing cutter after the milling process has ended and the cover has been opened before the cutter has come to a standstill. There are a variety of security options against such damage and injury, e.g. the opening flap of the housing could only be opened when the milling cutter has come to a standstill. As is known, however, this safety measure is often prevented by the fact that the housing can be opened when the milling cutter is still rotating. On the other hand, each time there is a waiting period for opening the housing and removing the processed spectacle lens from the housing until the high-speed milling cutter has finally come to a standstill. Both disadvantages are reliably avoided by means of simple construction by the device according to the invention.

Auf der Zeichnung ist ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung dargestellt und zwar zeigt

  • Fig. 1 eine perspektivische Ansicht der beiden wesentlichen Teile der Vorrichtung, nämlich des Gehäuses einerseits und des Motorteils mit seinem Arm und dem Fräser andererseits,
  • Fig. 2 die Vorrichtung im Vertikalschnitt und
  • Fig. 3 in der Draufsicht und einen teilsweisen Horizontalschnitt.
In the drawing, an embodiment of the device according to the invention is shown and shows
  • 1 is a perspective view of the two essential parts of the device, namely the housing on the one hand and the motor part with its arm and the milling cutter on the other,
  • Fig. 2 shows the device in vertical section
  • Fig. 3 in plan view and a partial horizontal section.

Die erfindungsgemäße Vorrichtung weist im wesentlichen das Gehäuse 1 und den Motorteil 2 auf. Beide Teile sind gemeinsam auf einer Grundplatte G (Fig. 2) angeordnet. Das Gehäuse 1 weist im wesentlichen kubische Form auf und zeigt die beiden Seitenwände 3,4 sowie die dem Benutzer zugekehrte Vorderwand 5 sowie die dem Motorteil 2 benachbarte Rückwand 6 auf. Die Oberwand des Gehäuses 1 wird durch einen bei 7 schwenkbar angeordneten und in Richtung des Pfeiles P (Fig. 2) auf- und zuklappbaren Deckel 8 gebildet.The device according to the invention essentially has the housing 1 and the motor part 2. Both parts are arranged together on a base plate G (Fig. 2). The housing 1 has an essentially cubic shape and shows the two side walls 3, 4 and the front wall 5 facing the user and the rear wall 6 adjacent to the motor part 2. The upper wall of the housing 1 is formed by a cover 8 which is pivotably arranged at 7 and can be opened and closed in the direction of the arrow P (FIG. 2).

Die dem Motor 23 zugekehrte Rückwand 6 besitzt einen zunächst vertikalen Abschnitt 9, an den sich ein geneigter Abschnitt 10 anschließt, der seine Fortsetzung in einem Abschnitt 11 erfährt. Die Rückwand 6 kann auch jede andere Ausbildung haben. Zwischen den beiden Rückwandabschnitten 10, 11 ist in der einen Vertikalhälfte des Gehäuses 1 und etwa auf halber Höhe desselben eine Ausbuchtung 13 vorgesehen. Diese besteht aus einer Oberwand 14, einer Unterwand 15 sowie einer Rückwand 16. Diese Ausbuchtung 13 hat eine bestimmte Größe, die im Zusammenhang mit dem unten beschriebenen Fräser als Bearbeitungswerkzeug noch näher erläutert wird und ist an ihrer in der ungefähr in der vertikalen Längsmittelebene des Gehäuses gelegenen Seite offen, auf Höhe der Seitenwand 4 dagegen verschlossen.The rear wall 6 facing the motor 23 has an initially vertical section 9, which is adjoined by an inclined section 10, which is continued in a section 11. The rear wall 6 can also have any other training. A bulge 13 is provided between the two rear wall sections 10, 11 in one vertical half of the housing 1 and approximately halfway up the same. This consists of an upper wall 14, a lower wall 15 and a rear wall 16. This bulge 13 has a certain size, which is explained in more detail in connection with the milling cutter described below as a machining tool and is approximately in the vertical longitudinal center plane of the housing located side open, however closed at the level of the side wall 4.

Die zweite Vertikalhälfte des Gehäuses 1 weist auf Höhe der Ausbuchtung 13 an der Rückwand 6 eine Öffnung 17 auf, die mindestens eine Höhe besitizt, die der vertikalen Breite des nachstehend noch beschriebenen Tragarmes des Fräsers entspricht, so daß dieser Tragarm durch die Öffnung 17 in das Innere des Gehäuses 1 hineinragen kann und dort in horizontaler Richtung verstellbar ist. Die Öffnung 17 wird nach oben und unten durch die Oberkante 18 und die Unterkante 19 begrenzt.The second vertical half of the housing 1 has at the level of the bulge 13 on the rear wall 6, an opening 17, which has at least a height that corresponds to the vertical width of the cutter arm of the milling cutter, described below, so that this arm through the opening 17 in the Can protrude inside the housing 1 and is adjustable there in the horizontal direction. The opening 17 is delimited upwards and downwards by the upper edge 18 and the lower edge 19.

Durch die beiden Seitenwände 3, 4 ragen die beiden Halbwellen 21, 22, die zwischen ihren einander benachbarten Enden in bekannter Weise das Brillenglas B (Fig. 2 und 3) halten, dessen Rand es zu bearbeiten gilt.The two half-shafts 21, 22 protrude through the two side walls 3, 4 and hold the spectacle lens B (FIGS. 2 and 3) between their adjacent ends in a known manner, the edge of which has to be machined.

Der Motorteil 2 der Vorrichtung zeigt einen Antriebsmotor 23 auf einem Tragteil 24, der die Ausbildung nach Fig. 1 oder nach Fig. 2 haben kann, der horizontal gelegen ist und rechteckige Form besitzt. An dem Motorgehäuse is auf Höhe der Öffnung 17 des Gehäuses 1 ein Tragarm 25 fest angeordnet, der einen dem Motor abgekehrten Abschnitt 26 und einen dem Motor zugekehrten Abschnitt 27 aufweist. Der erstgenannte Abschnitt trägt eine Welle 28, die parallel zur Motorwelle 29 gelegen ist, an ihrem freien Ende fliegend den Fräser 30 trägt und über den Riemen oder die Schnur 29a von der Welle 29 angetrieben ist. Diese Teile haben die Größe, die es dem Fräser erlaubt, bei Nichtgebrauch in die Ausbuchtung 13 vollständig eintreten zu können. Auch ist die Ausbildung und Anordnung des Armes 25, des Fräsers 30 und der Ausbuchtung 13 derart getroffen, daß der Fräser in Bezug auf das Brillenglas die notwendigen Bewegugen in zwei Koordinatenrichtungen in horizontaler Ebene auszuführen vermag.The motor part 2 of the device shows a drive motor 23 on a support part 24, which may have the configuration according to FIG. 1 or according to FIG. 2, which is located horizontally and has a rectangular shape. A support arm 25, which has a section 26 facing away from the motor and a section 27 facing the motor, is fixedly arranged on the motor housing at the level of the opening 17 of the housing 1. The first-mentioned section carries a shaft 28 which is located parallel to the motor shaft 29, carries the milling cutter 30 at its free end and over the belt or the cord 29a is driven by the shaft 29. These parts have the size that allows the milling cutter to be able to fully enter the bulge 13 when not in use. The configuration and arrangement of the arm 25, the milling cutter 30 and the bulge 13 is also such that the milling cutter can perform the necessary movements in two coordinate directions in the horizontal plane in relation to the spectacle lens.

Der den Motor 23 tragende Tragteil 24 ist nach Art eines Kreuzschlittens an sich bekannten Führungen 31, 32 in den beiden genannten Horizontal-Koordinatenrichtugen verstellbar. Derartige Kreuzschlittenanordnungen sind bei Brillenglasrandschleifmaschinen bekannt.The support part 24 carrying the motor 23 is adjustable in the manner of a cross slide in known guides 31, 32 in the two horizontal coordinate directions mentioned. Such cross slide arrangements are known in spectacle lens edge grinding machines.

Wie aus Fig. 2 erkennbar ist, kann der Motor 23 mit dem Arm 25 und dem daran angeordneten Fräser 30 derart bewegt werden, daß der Fräser aus der Bearbeitungsstellung 30 in die Nichtgebrauchsstellung 30' in der Ausbuchtung 13 und umgekehrt bewegt werden kann (Fig. 2 und 3). Der schwenkbare Deckel 8 steht mit einer nicht dargestellten Einrichtung, die mechanischer oder elektrischer Art sein kann und dem Fachmann bekannt ist, derart in Verbindung, daß der Deckel 8 erst geöffnet werden kann, wenn der Motor 23 in die Ausbuchtung zurückgefahren ist und der Fräser 30 in seine Stellung 30' bewegt wurde. Wesentlich nun ist, daß der Motor 23 und der hochtourige Fräser 30 hierbei noch nachlaufen können, ohne daß die Bedienungsperson dann Schaden erleidet, wenn der Deckel 8 geöffnet wird.As can be seen from FIG. 2, the motor 23 with the arm 25 and the milling cutter 30 arranged thereon can be moved such that the milling cutter can be moved from the machining position 30 into the non-use position 30 ′ in the bulge 13 and vice versa (FIG. 2 and 3). The pivotable cover 8 is connected to a device (not shown), which can be mechanical or electrical and is known to the person skilled in the art, in such a way that the cover 8 can only be opened when the motor 23 has returned to the bulge and the milling cutter 30 was moved into its position 30 '. It is now essential that the motor 23 and the high-speed milling cutter 30 can still run without the operator being damaged when the cover 8 is opened.

Vorzugsweise weist die Ausbuchtung 13 ein Scharnier 33 für eine Klappe 34 vor der Ausbuchtung 13 auf. Diese Klappe kann in Abhängigkeit von der Bewegung des Armes 25 in ihre Öffnungs- bzw. Verschlußstellung bewegt werden, d.h. die Klappe kann in die Stellung 34 hochgeschwenkt werden, so daß sie den Bearbeitungsprozeß des Fräsers 30 bei aus der Ausbuchtung ausgefahrenem Fräser 30 nicht behindert, andererseits jedoch bei in die Ausbuchtung 13 zurückgezogenem Fräser 30 (Stellung 30') ihre Stellung 34' einnimmt und damit den Fräser abdeckt, der in der Ausbuchtung nachlaufen kann.The bulge 13 preferably has a hinge 33 for a flap 34 in front of the bulge 13. This flap can be moved into its open or closed position depending on the movement of the arm 25, i.e. the flap can be pivoted up into position 34 so that it does not impede the machining process of milling cutter 30 when milling cutter 30 is extended from the bulge, but on the other hand assumes its position 34 'when milling cutter 30 is retracted into bulging 13 (position 30') and thus covers the milling cutter, which can run in the bulge.

Zwischen dem Gehäuse 1 und dem Motor 23 ist eine flexible, balgförmige Abdeckung 36 des Zwischenraumes 35 zwischen diesen beiden Teilen vorhanden, von der der Übersichtlichkeit halber nur der obere Teil dargestellt ist. Die Seitenteile dieses Balges sind heruntergezogen bis auf den Tragteil 24 des Motors 23.Between the housing 1 and the motor 23 there is a flexible, bellows-shaped cover 36 of the intermediate space 35 between these two parts, of which only the upper part is shown for the sake of clarity. The side parts of this bellows are pulled down to the support part 24 of the motor 23.

Claims (9)

1. A device for machining the edge of a spectacle glass with two horizontal half shafts (21, 22) holding the spectacle glass between them and with a rotating edge machining tool (30), driven by a motor (23) which is arranged in a stationary housing (1) provided with a pivotable cover (8), characterised in that the machining tool is a milling cutter (30) which is adjustable with its motor (23) in two horizontal coordinate directions, relative to the half shafts (21, 22) holding the spectacle glass, and is able to be moved horizontally into a bulge (13) of the housing (1) protecting the user completely from damage and injury from the milling cutter (30) when the cover is open, and is able to be moved out of this into its working position, and in that the device has an arrangement which prevents the cover (8) opening, if the milling cutter is not driven back into the bulge.
2. A device according to claim 1, characterised in that the tool (30) is arranged in an overhanging position on an arm (25) connected to the motor (23).
. 3. A device according to claim 1 and 2, characterised in that the bulge (13) extends over approximately half of the width of the housing (1
4. A device according to claim 1 and one of claims 2 or 3, characterised in that the bulge (13) has a square or rectangular cross-section, extending parallel to the motor shaft and is provided at half or approximately half of the height of the housing (1).
5. A device according to claim 1 and one of claims 2 to 4, characterised in that the bulge (13) is able to be sealed on the side adjacent to the half shafts (21, 22) by a pivoting or sliding flap (34).
6. A device according to claim 5, characterised in that the flap (34) of the bulge (13) is connected, in terms of motion by way of rods, levers or the like, to the cover (8) of the housing (1).
7. A device according to claim 1 and one of claims 2 to 6, characterised in that an axial extension of the bulge (13) the rear wall (6) of the housing (1) has a passage opening (17) for the milling-cutter arm (25) in which the arm (25) is able to be moved into two horizontal coordinates.
8. A device according to claim 1 and one of claims 2 to 7, characterised in that the bulge (13) towards the side lying towards the passage opening is open, and is closed at the level of one housing side wall (4).
9. A device according to claim 1 and one of claims 2 to 8, characterised in that the motor (23) is arranged on a cross-slide and that there is provided between that and the housing (1) a flexible cover (36) arranged for the arm (25) as well as the passage opening (17) of the housing (1) for the arm (25).
EP87106371A 1986-05-14 1987-04-30 Device for machining the edge of a spectacle glass Expired - Lifetime EP0245726B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8613032U 1986-05-14
DE8613032U DE8613032U1 (en) 1986-05-14 1986-05-14 Device for processing the edge of a spectacle lens

Publications (3)

Publication Number Publication Date
EP0245726A2 EP0245726A2 (en) 1987-11-19
EP0245726A3 EP0245726A3 (en) 1988-02-10
EP0245726B1 true EP0245726B1 (en) 1990-10-03

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EP87106371A Expired - Lifetime EP0245726B1 (en) 1986-05-14 1987-04-30 Device for machining the edge of a spectacle glass

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US (1) US4772160A (en)
EP (1) EP0245726B1 (en)
JP (1) JPS62292354A (en)
DE (2) DE8613032U1 (en)

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US6623339B1 (en) * 1999-08-06 2003-09-23 Hoya Corporation Lens processing device, lens processing method, and lens measuring method
FR2843903A1 (en) * 2002-08-30 2004-03-05 Briot Int Grinding apparatus for ophthalmic lenses has electric drive motor rotatably driving grindstones and shaft, and transmission device that has degree of freedom of movement parallel to lens derive and grindstone movement axes
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Also Published As

Publication number Publication date
JPS62292354A (en) 1987-12-19
DE8613032U1 (en) 1986-08-14
EP0245726A3 (en) 1988-02-10
US4772160A (en) 1988-09-20
EP0245726A2 (en) 1987-11-19
DE3765306D1 (en) 1990-11-08

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