EP2782708A2

EP2782708A2 - Method and device for blocking spectacle lenses

Info

Publication number: EP2782708A2
Application number: EP12809579.1A
Authority: EP
Inventors: Gunter Schneider; Ulf BÖRNER
Original assignee: Schneider GmbH and Co KG
Current assignee: Schneider GmbH and Co KG
Priority date: 2011-11-23
Filing date: 2012-11-23
Publication date: 2014-10-01
Anticipated expiration: 2032-11-23
Also published as: US20140315472A1; CN104066546B; EP2782708B1; CN104066546A; BR112014012375B1; BR112014012375A2; WO2013075834A2; US9694465B2; WO2013075834A3

Abstract

The invention relates to a blocking device and a method for blocking spectacle lenses on block pieces, with a main body, with a block piece mount, arranged on the main body, for the block piece to be attached to the spectacle lens, and with a positioning unit arranged on the main body for aligning and holding the spectacle lens to be blocked, wherein the block piece mount and the positioning unit, which can be fixed on the spectacle lens by means of activation, can be moved relative to one another via a lifting axis, wherein the approaching movement between the positioning unit and the block piece mount in the direction of the lifting axis is limited in at least two positions by an adjustable stop means.

Description

Method and device for blocking spectacle lenses

The present invention relates to a method for blocking a spectacle lens according to the preamble of claim 1 or 7 and a blocking device for blocking spectacle lenses on block pieces according to the preamble of claim 8.

In general, the term "spectacle lens" is to be understood as meaning, in particular, a plastic lens for spectacles.

The invention relates in particular to a blocking device for blocking spectacle lenses or spectacle lens semifinished products on block pieces having a base body, with a block body receptacle arranged on the base body for the block piece to be fastened to the spectacle lens and with a positioning unit arranged on the base body for aligning and holding the spectacle lens to be blocked in which the block piece receptacle and the positioning unit which can be fixed on the spectacle lens by activation can be moved relative to one another via a lifting axis.

Furthermore, the invention relates in particular to a method for blocking a spectacle lens with a holding side on a coupling side of a block piece by means of plastic adhesive, wherein the block piece is received in a block piece receptacle and the spectacle lens is movable relative to the block piece along a lifting axis.

There is already a blocking device for blocking spectacle lenses on block pieces from DE 10 2008 023 093 AI known. This blocking device has a block piece receptacle and a transport unit for positioning the spectacle lens to be blocked. In order to align the relative position between the block piece and the spectacle lens, the transport unit is movable in five controlled spatial axes. A translatory lifting axis, a translational transverse axis and three axes of rotation aligned at right angles to one another, the axes of rotation being an axis of rotation and two tilting axes, which thus represent all three possible spatial axes of rotation. The two tilt axes are provided to ensure a spatial tilting of the lens relative to the block piece. About the translational

CONFIRMATION COPY Hubachse the spectacle lens is pressed while leaving a defined gap against the block piece. The spectacle lens, which is aligned mechanically relative to the block piece via the positioning unit, is placed on the adhesive and applied at least indirectly to the block piece by pressing. An end stop of the translatory lifting axis is not achieved here. It is only a predetermined holding position of the translational lifting axis in the context of the position control.

US 2,660,011 discloses a horizontal alignment of a lens blank on a table wherein the lens blank is vertically raised after alignment and lowered upon pivoting the table away onto a heated adhesive block piece disposed thereunder.

The prior art does not permit optimum positioning of a spectacle lens on an associated block piece, in particular when the retaining piece of the spectacle lens facing the block piece and the coupling side of the block piece facing the spectacle lens are adapted to one another or complementary to one another and tilting for optimum alignment is required. Furthermore, the prior art does not allow optimal blocking, especially when the block or adhesive requires a certain minimum thickness or optimum thickness, as is the case in particular with plastic adhesives.

The invention has for its object to form a method for blocking and a Aufblockvorrichtung such or suggest that a simplified application is guaranteed despite a wide range of applications or enabled and / or that optimal or optimized blocking of lenses by means of an adhesive, preferably from Plastic, on block pieces is made possible.

The above object is achieved by a method according to claim 1 or 7 or by a blocking device according to claim 8. Advantageous developments are the subject of the dependent claims. By the upstream or preferred placing the holding side of the spectacle lens on the adhesive-free coupling side of the block piece which can be used for Aufbio- Necessary relative position between the lens and the block piece are made in a simple manner. The block piece preferably has a negative surface of the holding side of the spectacle lens, so that they can be brought almost completely against each other when placed on the plant, thus justify a complete alignment.

With the preferred setting of the Blockstückaufnahme including the recorded therein block piece or the tilting position of the block piece or the block piece receptacle relative to the lens or the position of the lens transversely to the Hubachse and / or setting the rotational position of the lens relative to the block piece or the Blockstückaufnahme as well as the fixing of the spectacle lens to the positioning unit, this relative position between the spectacle lens and the block piece can be fixed, so that the spectacle lens can be lifted off from the block piece again via the positioning unit.

By lifting the introduction of adhesive is made possible, which is preferably applied to the block piece, but can also be applied alternatively or additionally to the holding side of the spectacle lens. By subsequent replacement of the spectacle lens on the adhesive-provided block piece, in particular using an end stop with a changed position, the spectacle lens is fixed at a predetermined or certain distance from the block piece. This takes place in the previously obtained and as described fixed relative position between spectacle lens and block piece, so that an expanded or defined and / or uniform adhesive film between see the spectacle lens and the block piece is achieved.

In particular, it may be advantageous if the block piece on the coupling side is provided with markings and the spectacle lens has spectacle glass markings, wherein the markings and the spectacle lens markings are aligned relative to one another for positioning the spectacle lens. The alignment of the lens markings and the markings of the coupling side are preferably carried out manually.

In particular, it is provided that the starting movement between the positioning unit and the block piece receptacle in the direction of the lifting axis is limited by at least one adjustable stop means in at least two positions. In particular, a mechanical end stop is provided for the approach movement between the positioning unit and the block piece receptacle, which may have two positions with respect to or in the direction of the lifting axis. This is realized in particular by a stop means which can be brought into at least two positions or by means of two different stop means, of which at least one is movable. Both positions differ by their distance in the direction of the lifting axis. In one position, the distance a between the positioning unit and the block piece receptacle is greater than in the other position. Starting from the position of the spectacle lens against the block piece, the distance a, that is to say a defined distance, from the block piece is thereby achieved so that an adhesive layer with a thickness corresponding to this distance can be realized. Due to the greater or defined thickness of the adhesive layer, stresses which may arise when the adhesive layer is cured are not transmitted unevenly to the spectacle lens. In particular, due to the greater or more defined thickness of the adhesive layer, a more reliable or defined block connection (connection of the spectacle lens with the associated block piece) can be achieved or ensured.

It can also be advantageous for this purpose if the stop means is stepped or infinitely variable in several positions, wherein the stop means is at least partially adjustable in the direction of the lifting axis or transversely to the direction of the lifting axis. By using different stages, a simple operation of the sling is guaranteed. This is also achieved when the stop means has at least one end stop E forming abutment surface, wherein the stop means as transversely adjustable to the direction of the stroke axis stop plate with a plurality of stepped stop surfaces or adjustable in the direction of the stroke stop nut with stop surface or as transverse to the direction of the stroke axis adjustable Anlagagrampe is formed with an abutment stop surface. Thus, using the one stop means, the position of the end stop can be set differently. There are different heights a or adhesive thickness between the lens and the block piece feasible. Furthermore, it can be advantageous if the positioning unit has a retaining element which can be fixed to the spectacle lens by activation and optionally functionally separates it from an alignable against the spectacle lens alignment element, preferably wherein the holding element can serve as an alignment. The alignment element serves primarily for aligning the spectacle lens, that is to say the block element lying in the block element receptacle, in order to obtain a defined and fixable position. However, the holding element that can be applied against the spectacle lens can also be used to align the spectacle lens. Finally, alignment of the spectacle lens after the positioning unit is achieved by starting the holding element or the aligning element against a reference surface of the spectacle lens resting on the pivotable block piece. This position is maintained by setting the positioning unit. During the subsequent pressing of the lens to be blocked against the adhesive-provided block piece, it is necessary to mold the adhesive to be introduced between the lens and the block piece, starting from a drop-shaped or spherical metered quantity. This contact force is transmitted in total by the fixing unit fixed to the spectacle lens, wherein a uniform thickness of the adhesive is ensured or achieved according to the distance a.

For the distance a, and therefore for the adhesive layer, the following values are preferably suitable: 0 to 3 mm, 0.1 to 2 mm, 0.1 to 1, 5 mm, 0.1 to 1 mm, 0.3 to 1 mm , 0.3 to 0.7 mm, 0.4 to 0.7 mm, 0.5 to 0.7 mm, 0.6 mm.

Preferably, the distance a or the thickness of the adhesive layer is - at least on average - more than 0.3 mm, in particular more than 0.4 mm, more preferably more than 0.5 mm and most preferably more than 0.6 mm.

Preferably, the distance a or the thickness of the adhesive layer is - at least on average - substantially 1 mm, in particular +/- 0.2 mm.

It may also be advantageous if the positioning unit or the holding element has a suction cup for holding or fixing the spectacle lens, in particular wherein the suction cup has an inner side that can be pressurized with negative pressure. The suction cup is preferably elastic, so that it can adapt to the spectacle lens of the spectacle lens surface in accordance with both local as well as the inclination of the surface as a whole after at least a partial area. This inclination movement is also accompanied by an elastic deformation of the suction cup. It may advantageously be provided be that on the holding element and / or in the inside of the suction cup is a lighting unit. By means of the illumination unit, a light pattern could be imaged as a reference mark on the lens to be blocked, which would be useful to the user in aligning the lens relative to the holding element. Concentric circles and / or lines as well as crosses could be considered as the form of these light patterns, by means of which it would be possible to align the spectacle lens possibly provided with spectacle lens markings.

Of particular importance may be for the present invention, when the alignment element has two or three acting in the direction of the stroke axis investment pins which are arranged circumferentially to the lifting axis and / or around the suction cup around and / or against the spectacle lens in the direction of the lifting axis also proportionately can be applied. When using three abutment pins, the abutment of the abutment element relative to the spectacle lens or the spectacle lens surface to be applied is completely determined. In the case of the fixed holding element thus a further pivoting movement or tilting movement of the spectacle lens relative to the contact element would no longer be possible. In the case of the application of two abutment pins at least the fixing of the tilting movement of the abutment element about a tilting axis would be possible. Thus, one degree of freedom would remain for the pivoting or tilting between the contact element and the spectacle lens. This is but lockable.

It may be advantageous if the alignment element has a translation axis extending parallel to the stroke axis, wherein a coupling is provided, by means of which the alignment element and the holding element can be coupled, wherein in the coupled state, the movement of the alignment along the lifting axis and the movement of the holding element are synchronized or coupled along the translation axis and in the uncoupled state, the translational movement of the holding element in the direction of the translation axis can be carried out independently of the lifting movement of the alignment in the direction of the lifting axis. Due to the independence between the holding element and the alignment element, both the holding element and the alignment element can be brought independently of each other against the lens to be mounted to the plant. The latter primarily in the direction of the translation axis, along which both elements are movable. The holding element and the alignment element are movable relative to each other exclusively in the direction of the translation axis. After the respective application or suction against the lens no relative movement between the two elements is possible after coupling the two elements via the coupling. In the coupled state, therefore, the positioning device as a whole, that is, the alignment and the holding element moves synchronously along the stroke axis. This is initially a lifting movement with the eyeglass lens attached to the positioning device, to which then, after application of the adhesive, a lowering movement follows, by means of which the eyeglass lens is placed on the block piece.

It can also be advantageous if the lifting axle and / or the clutch can be operated manually. The manual operation of the Hubachse a simple construction is guaranteed overall. Only the lifting axis could be equipped with an automatic drive to have a total of a simple and versatile blocking device.

It may also be advantageous for the block piece receptacle to have two tilting axes aligned at right angles to one another and at right angles to the lifting axis and for both tilting axes to be manually freely pivotable and fixable in a desired position. The perpendicularity to each other and relative to the lifting axis is also to be understood so that only one directional component of the respective tilting axes can be rectangular. The tilting axles are free, inactive axles that are not subject to any drives or gearboxes. This ensures a very simple structure despite the use of these tilt axes. Because the tilting axes are arranged at right angles to one another, any necessary compensating movement of the spectacle lens for the purpose of coupling to the holding element is possible. The two tilting axes are realized by a sliding or rolling body-mounted dome, whose movement in the storage bed can be blocked by application of negative pressure. Such a dome is completely free to pivot within its storage level and therefore also has the two aforementioned tilt axes.

Further advantages and details of the invention are explained in the patent claims and in the description and illustrated in the figures. Show it: Fig. 1 is a perspective view of a proposed blocking device;

2 shows a perspective view of the blocking device with the camera folded away and the suction cup lowered;

FIG. 3 shows a schematic vertical section of the blocking device according to FIG. 2; FIG. 4 shows a schematic vertical section of the blocking device according to FIG. 1 from the front;

5 shows a schematic vertical section of the blocking device according to FIG. 2 from the front;

6 shows a schematic vertical section of the blocking device with the spectacle lens blocked;

7 shows a partial enlargement of FIG. 2 in the upper region of the blocking device with an end stop;

8 shows a schematic section of the end stop;

Fig. 9 is a schematic section of the end stop according to another

Embodiment;

10 shows a schematic section of the end stop according to a further embodiment variant; 11 is a schematic plan view or schematic diagram concerning the

Alignment of the spectacle lens with the aid of light patterns;

12 is a schematic plan view or schematic diagram concerning the

Alignment of the spectacle lens by means of markings; 13 shows a perspective view of the blocking device according to another embodiment variant;

14 shows a perspective view of the blocking device according to a further embodiment variant; and

Fig. 15 is a schematic diagram illustrating a prismatic tilting.

For identical and similar components and components, the same reference numerals are used, wherein preferably the same or corresponding properties result, even if a repeated description is omitted.

Fig. 1 shows a proposed blocking device 1 in a perspective view. The blocking device 1 preferably has a block piece receptacle 2 for a block piece 9. The block piece 9 serves to receive and hold a spectacle lens 8 indicated in FIG. 1. The spectacle lens 8 is in particular a spectacle lens made of plastic or a plastic lens. In particular, it is a lens blank. In the illustrated state, the spectacle lens 8 is located with its side facing the block piece 9 holding side 8.1 on the block piece 9 and its coupling side 9.1. The block piece 9 facing away from the reference page 8.2 or still unprocessed side or flat side 8.2 of the lens 8 has in the illustrated example upwards.

The blocking device 1 preferably has an in particular C-shaped base body or machine body 1.1, on the lower side of which the block piece receptacle 2 for a block piece 9 for a spectacle lens 8 is provided. Preferably, the Blockstückaufnahme 2 about two tilting axes Kl, K2 tilt or pivot. About this Kippachsen Kl, K2, the Blockstückaufnahme 2 and thus the block piece 9 tilted relative to a spectacle lens 8 to be arranged thereon or moved in a tilting movement and aligned.

The blocking device 1 preferably has a positioning device or unit 3. The positioning unit 3 is used in particular for aligning and / or raising or lowering it on the block piece 9 to be arranged spectacle lens 8. In particular, the spectacle lens 8 is in the direction of a vorzugswei- se vertically extending stroke axis or movement axis Hl linearly movable by means of the positioning unit 3, particularly preferably raised and lowered.

The positioning unit 3 preferably has a retaining element 3.1 designed in particular as a toothed rack, an associated suction cup 3.3 and / or an associated drive 3.9.

At the upper end of the drive 3.9 is provided for which preferably designed as a push-push rod holding element 3.1 with the suction cup 3.3 preferably arranged at the lower end. About the preferably manually operated drive 3.9 can be the holding element 3.1 with the suction cup 3.3 in the direction of the preferably vertical lifting axis Hl translationally move up and down.

Parallel to this lifting movement along the lifting axis Hl, a carriage 3.8a is preferably provided which is guided or displaceable via a corresponding rail 3.8b on the main body 1.1 or the blocking device 1 in the direction of a parallel or vertical translation axis T1. The positioning unit 3 or its carriage 3.8a has or preferably carries an alignment element 3.2, which can be applied in particular via three contact pins 3.2a-3.2c against the spectacle lens 8 or its reference side 8.2. The alignment element 3.2 is preferably axially immovably coupled via a particular radially engaging coupling 3.7 with the holding element 3.1, so that this preferably referred to as positioning unit 3 assembly as needed or optionally together via the drive 3.9 translationally in the direction of the stroke axis Hl or the translation axis Tl or is vertically movable.

Preferably, the front side or coupling side 9.1 of the block piece 9 facing the lens 8 to be blocked is adapted to the preferably preformed, particularly preferably arched holding side 8.1 of the spectacle lens 8, particularly preferably at least substantially complementary thereto. In particular, the adaptation of the block piece 9 or the coupling side 9.1 takes place by appropriate selection of the block piece 9 from a multiplicity of different block pieces 9 or particularly preferably by prior, in particular machining, the block piece 9 or the coupling side 9.1. Particularly preferably, the block piece 9 is made Plastic and is accordingly very easy, especially in a processing device, not shown, for processing of spectacle lenses machined in the desired manner. Preferably, the spectacle lens 8 is immediately before the actual blocking with the block piece 9 immediately - so without an adhesive - placed on the block piece 8, so that the holding side 8.1 (possibly with a protective layer or cover) is located directly on the coupling side 9.1. After placing, the spectacle lens 8 is preferably firstly aligned relative to the block piece 9. This alignment preferably comprises an alignment by transverse displacement, rotation and / or tilting.

The alignment by transverse displacement, ie in the radial direction with respect to the lifting axis Hl or a central axis of the block piece 9 or in a plane parallel to the reference page 8.2 of the lens 8, is preferably carried out manually and / or by means of appropriate light pattern 3.6 or marks 8.3 and 9.2, as explained later in more detail. The alignment by turning, so setting a rotational position of the lens 8 relative to the block piece 9, preferably by means of appropriate light pattern 3.6 or 8.3 and 9.2 markers, as explained in more detail later.

For aligning by tilting the spectacle lens 8, the block piece 9 or these tilted in their tilted position to each other, in particular around at least one tilt axis Kl, K2, in particular so that the preferably not yet machined or planar top or reference surface 8.2 of the lens 8 a desired orientation, particularly preferably in the horizontal occupies. This alignment is preferably carried out by the positioning unit 3 or by the alignment element 3.2.

As a result of the tilting axes K1, K2, in particular on the block piece receptacle 2, or any other, in particular, free tiltability, this can preferably be arbitrary with the spectacle lens 8, which rests with its holding side 8.1 on the block piece 9 or its coupling side 9.1 tilt. Preferably, the spectacle lens 8 can also be tilted relative to the block piece 9. pen. Thus, the reference page 8.2 of the alignment element 3.2 or 3.2 of the investment pins or 3.2a or the suction cup 3.3 align as desired.

Next, before or after an alignment of the rotational position - ie rotational position - of the lens 8 relative to the block piece 9. For this purpose, for example, an optics, image pickup unit or camera 3.5 of the blocking device 1 or positioning 3 are used, as shown schematically in Fig. 1 , In Fig. 1, the camera 3.5 is arranged in the movement or lifting axis Hl. FIG. 2 shows, in a similar perspective arrangement, the blocking device 1 with the camera 3.5 moved away or moved away from the movement axis H1. Here the positioning unit 3 or the retaining element 3.1 or the suction cup 3.3 has already been lowered onto the spectacle lens 8 or its reference side 8.1. Fig. 3 shows the blocking device 1 in a vertical section in this state.

The Blockstückaufnahme 2 is preferably freely pivotable in a dome 2.1. The two mentioned tilting axes K1, K2, which are preferably oriented at right angles to one another, are preferably only of a theoretical nature, since preferably a free pivotability of the block piece receptacle 2 in the dome 2.1 in the illustrated example is made possible. However, other, for example, cardanic tilt bearings or axle arrangements are possible.

In the aligned relative position between spectacle lens 8 and positioning unit 3, the suction cup 3.3 is attached or fixed to the surface 8.2 by means of negative pressure. Preferably, the retaining element 3.1 is simultaneously coupled via the coupling 3.7 with the carriage 3.8a and thus the alignment element 3.2 relative to the suction cup 3.3 fixed. The application of negative pressure results in a contact force of the spectacle lens 8 against the positioning unit 3 or the contact pins 3.2a-3.2c, so that a displacement of the spectacle lens 8 relative to the positioning unit 3, ie relative to the suction bell 3.3 or relative to the alignment element 3.2 is not more is possible. For this purpose, it would require a translational displacement movement of the suction cup 3.3 and the alignment element 3.2 on the surface of the lens, which is not possible due to the holding force of the suction cup 3.3. The drive 3.9 preferably has an operating lever 3.9a, via which the holding element 3.1 designed here as a toothed rack can be moved in a simple manner in the direction of the lifting axis H1 according to FIG.

When the coupling 3.7 is released, the alignment element 3.2 preferably comes into contact with the spectacle lens 8 solely on the basis of gravity, in particular supported by the mass of the carriage 3.8a and the coupling 3.7, and ensures or supports a corresponding alignment and installation of the spectacle lens 8 to the pins 3.2a-3.2c. When the clutch 3.7 is open, regardless of this contact movement in the direction of the translation axis Tl, the retaining element 3.1 with the suction cup 3.3 in the direction of the lifting axis Hl against the lens 8 are brought to bear. In this lower position PI preferably a guided at the upper end of the rack 3.1 stop ring 3.1a is coupled via a coupling element 3.1b with the rack 3.1. Thus, preferably formed by the base body 1.1 as a stop means end stop E is defined with a first position PI.

For lifting the system pins 3.2a-3.2c, the holding element 3.1 is preferably raised so far with the suction cup 3.3, that the suction cup 3.3 against the carriage 3.8a, in particular against a holding element 3.1 leading leg of the carriage 3.8a, comes to rest and this with leads upwards. In this upper, to a degree .DELTA.Η upwardly driven position of the holding element 3.1 shown in FIG. 4 is preferably provided a detent position of the drive 3.9, so preferably an activation or actuation of the drive 3.9 is necessary for shutdown.

After conditioning or edition with prior alignment of the lens 8 on the block piece 9, the Kippachsen Kl, K2 or the Blockstückaufnahme 2 in a cap 2.1 according to FIG. 5 in particular by means of or by applying negative pressure, preferably by pressing a switch 4.1 (see Figs. 1 and 2), locked. Thus, overall the relative position between the spectacle lens 8 with its reference side 8.2 on the one hand and the resting on the Blockstückaufnahme 2 block piece 9 on the other hand, with the exception of the lifting movement along the lifting axis Hl set. After lifting the spectacle lens 8, an adhesive 10, in particular made of plastic, can be applied to the block piece 9 and / or the spectacle lens 8.

The adhesive 10 is preferably applied and / or heated in the heated state, in particular in order to liquefy and / or render it capable of being rendered.

After application of the adhesive 10, the spectacle lens 8 is lowered again by means of the positioning unit 3, in particular by actuation of the drive 3.9. In particular, the spectacle lens 8 is pressed against the - preferably still warm or not solidified - adhesive 10 and thus against the coupling side 9.1 of the block piece 9. In this case, the spectacle lens 8 is particularly preferably approximated only to the block piece 9 and, in particular, a predetermined distance a is maintained, as explained in more detail below. Alternatively, however, a pressing with a predetermined and / or path-dependent, in particular to the lens 8 towards decreasing force is possible.

For applying the spectacle lens 8 against the provided with adhesive 10 coupling side 9.1 of the block piece 9 of FIG. 6 is preferably between a preferably formed by a stop ring 3.1a stop on the holding element 3.1 on the one hand and the body 1.1 or other abutment on the other hand, a stop 1.2 laterally inserted or inserted according to the arrow. As a result, the end stop E is changed or a new or changed position P2 formed, so that according to the thickness a of the stop means 1.2, the predefined or desired distance a between the spectacle lens 8 and the block piece 9 is ensured. Thus, the spectacle lens 8 is positioned at said distance a relative to the block piece 9, so that the adhesive 10 contained between the spectacle lens 8 and the block piece 9 is present or spread in a corresponding thickness between the spectacle lens 8 and the block piece 9.

According to FIGS. 2 and 3, the alignment element 3.2 and the suction bell 3.3 are preferably applied against the spectacle lens 8 as described above, and the suction bell 3.3 is fixed. At the upper end of the rack 3.1, preferably the stop ring 3.1a is provided, which then abuts against the main body 1.1, thus the end stop E in the position PI, and then preferentially wise clamping the retaining element 3.1, in particular pneumatically or by negative pressure, is set.

After lifting the lens 8 for the purpose of supplying adhesive to the block piece 9, the stop means 1.2 is moved with the height a of Fig. 6 and Fig. 7 in the direction of arrow to the left, so that after subsequent re-exposure of the lens 8 for conditioning against the adhesive Stop ring 3.1a comes against the stop means 1.2 to the plant. The stop means 1.2 forms the new end stop E in the position P2, so that the spectacle lens 8 is now positioned above the block piece 9 at a distance a, preferably of about 0.5 mm to 1.5 mm (shown here larger). However, the height of the sling 1.2 can be chosen arbitrarily.

The activation or movement of the stop means 1.2 is preferably delayed, so that the new end stop E is present only when the operator has moved the positioning unit 3 for the purpose of supplying adhesive 10 upwards. With simultaneous activation, ie together with the clutch 3.7 and the suction cup 3.3, if necessary, the stop means 1 .2 with bias laterally against the stop ring 3.1a, which in principle would also be possible.

The stop means 1.2 can also be formed as shown in FIG. 8 as a stop plate with different stop surfaces f 1, f2, f3. In Fig. 8, the end stop E is shown in a further position P3. Alternatively, a wedge-shaped stop member according to FIG. 9 is also possible, in which case the lateral positioning has to be carried out much more accurately.

The stop means 1.2 can also be formed as shown in FIG. 10 as a stop nut which is adjustable via a thread 1.2b relative to the stop ring 3.1a continuously in the direction of the stroke axis Hl.

The positioning unit 3 or the holding element 3.1 is therefore preferably lowered only until reaching the modified end stop E or the changed new position P2. After reaching this changed (in the display example higher) end position P2 further actuation of the drive 3.9 is no longer possible and / or further lowering of the lens 8 on the block piece 9 is no longer possible. Accordingly, the predetermined remains or desired distance a between the block piece 9 and the spectacle lens 8 is obtained. This distance a thus specifies the thickness of the adhesive layer.

It should be noted that, instead of the change in the position PI of the end stop E to the position P2 described by way of example with reference to FIG. 6, other constructive solutions are possible as well. In particular, another mechanical adjustment or change of the end stop E, but alternatively possibly also, for example, a change in a desired value in a control or regulation is possible.

For the purpose of applying the negative pressure to an inner side 3.4 of the suction bell 3.3, a pressure line 3a is preferably provided, which can be acted upon accordingly with negative pressure. The same applies preferably to the coupling 3.7 and a coupling element 3.1b of the stop ring 3.1a, which have a vacuum supply 3.7a, 3.1c. The suction cup 3.3 and the clutches 3.7, 3.1b are then preferably applied simultaneously with negative pressure.

The coupling 3.7 and the coupling element 3.1b (coupling of the stop ring 3.1a) can also be actuated independently of each other and / or independently of the suction cup 3.3 or actuated or actuated.

According to FIG. 4, 5, the block piece receptacle 2 preferably has a bearing 2.1 designed as a dome, via which it can be brought into the desired position. By subjecting the bearing 2.1 with negative pressure (in particular controlled by the switch 4.1 or otherwise), the Blockstückaufnah- me 2 is set in the bearing 2.1. Thus or otherwise, a locking means 4 for blocking or fixing the tilting axis (s) K1, K2 can be realized.

According to FIG. 4, 5, a lighting unit 3.6 is preferably provided within the suction bell 3.3. For the purpose of orientation or alignment of the spectacle lens 8 relative to the positioning unit 3 or suction bell 3.3, a light pattern 3.6a, 3.6b, as schematically indicated in FIG. 11, can be generated via the illumination unit 3.6, which facilitates positioning of the spectacle lens 8 as a positioning aid , According to FIG. 11, such light patterns may be formed as a centric center circle 3.6a or as a concentric circle circle 3.6b. These show up the spectacle lens 8 or on its reference page 8.2, the position of the suction cup 3.3 or the desired position of the lens 8, so that the lens 8 relative to the block piece 9 - in particular by lateral displacement, rotation and / or tilting - can be aligned accordingly.

According to FIG. 12, the spectacle lens 8 preferably has one or more visible spectacle glass marks 8.3, while the block piece 9 preferably has one or more corresponding markings 9.2 which can be visually brought into coincidence by the user. This can be achieved without optical aids or also on the basis of the image obtained by the camera 3.5, as explained below. The latter is much more accurate, since a preferably centric view of the mentioned markings 8.3, 9.2 is possible via the camera 3.5.

According to FIGS. 1 and 2, the camera 3.5 can be brought into an approximately horizontal position (FIGS. 1, 4) via a pivot axis 3.5a starting from a lateral, vertically aligned position (FIGS. 2, 5). In this horizontal position, a lens 3.5b of the camera 3.5 is aligned concentrically to the lifting axis Hl or a central axis M. In this position, the objective 3.5b is concentric with the spectacle lens 8, so that the marking 8.3 according to FIG. 11 and / or FIG. 12 can be detected in a centric viewing direction. The camera image is displayed to the user via a monitor, not shown, so that it can align the spectacle lens 8 as desired to the block piece 9.

To operate the camera 3.5, this preferably has a grip part 3.5c, by means of which the camera 3.5 can be brought into said horizontal position. When the camera is released, the latter, in particular because of a center of gravity S arranged eccentrically to the pivoting axis 3.5a, pivots, preferably by itself, into the vertical lateral position according to FIG. 4. In this position, an adjustment of the positioning unit 3 or the suction bell 3.3 is possible.

Of course, the aforementioned alignment aids 3.6a, 3.6b, 8.3, 9.2 can be used in any combination. The camera 3.5 is not absolutely necessary in this sense, the same applies to the light patterns 3.6a, 3.6b. Alone enough would be z. B. the two markers 8.3, 9.2, which are aligned with each other. Alternatively, however, the sole application of the light pattern would be after Fig.12 sufficient if it depends solely on the centric placement of the lens 8.

FIG. 13 shows an alternative embodiment, wherein the blocking device 1 or the positioning unit 3 has no coupling 3.7 and no alignment element 3.2. The Blockstückaufnahme 2 or preferably indirectly resting thereon block piece 9 and the lens 8 is individually aligned only by the suction cup 3.3 the position, so that the suction cup 3.3 is then set after exposure to negative pressure on the lens 8. When setting may possibly be a tracking of the positioning unit 3 due to the narrowing or contracting in the axial direction suction cup 3.3. After setting the two tilt axes Kl, K2 in particular via the locking means 4 and the switch 4.1 thus remains as in the embodiment described above, only a free lifting movement in Riehtung the lifting axis Hl, which ensures the application of adhesive 10 between the lens 8 and block piece 9.

It should be noted that the variable end stop E can also be omitted as needed. Fig. 14 shows such an embodiment.

The embodiment according to FIG. 14 also shows that the tilting axes K1 and K2 can also be arranged or realized differently. Here, for example, the first tilting axis K1 is assigned to the aligning element 3.2, and the second tilting axis K2 extending transversely thereto is assigned to the block piece 9 or the block piece receptacle 2. Here, then, the alignment element 3.2 is tiltable or pivotable about the tilting axis Kl. The block piece 9, however, is here only tiltable or pivotable about the second tilting axis K2.

Alternatively or additionally, the suction cup 3.3 can also be tilted or pivoted about a (fictitious) tilting axis F1.

In particular, so are different Achsstapellungen possible.

15 shows, in a schematic representation, how a prismatic tilting of the spectacle lens 8 can be compensated by the tilting axis K1, so that the suction bell 3.3 can be tilted as far as possible up to the top or back. 8.2 side of the lens 8 can be placed. By appropriate alignment of the lens 8 or Blockstücks 9 in the circumferential direction can be a prismatic tilt, be it a tilt of the lens 8 and / or the block piece 9, align a desired tilt axis Kl. This is advantageous, in particular if only a single tilting axis K1 is provided or provided. In particular, the axis of the prismatic tilting will then preferably be aligned parallel to the tilting axis K1. Accordingly, if necessary, only a single tilt axis Kl suffices.

Individual aspects and features of the various embodiments can be combined with one another as desired, but can also be implemented independently of one another.

Block of Blocking Device

Main body, machine body

Slings, stop nut

thread

Block piece holder

Bearing, calotte

positioning

pressure line

Retaining element, rack

stop ring

Coupling element, coupling

pressure supply

aligning

conditioning pin

suction cup

inside

Image capture unit, camera

swivel axis

lens

handle part

lighting unit

Light pattern, centric center circle, alignment aid light pattern, concentric circle circle, alignment aid coupling

Vacuum supply

carriage

rail

Drive, gear

Lever, operating lever

locking

switch

lens 8.1 holding side

8.2 Reference page

8.3 Eyeglass mark, alignment aid

9 block piece

9.1 Coupling page

9.2 Marking, alignment aid

10 adhesive, plastic adhesive a distance, height, thickness

E end stop

fl stop surface

f2 stop surface

f3 stop surface

ΔΗ measure

Hl lifting axis, movement axis

Kl tilting axle

K2 tilt axis

M central axis

PI position of E

P2 position of E

P3 position of E

S focus

Tl translation axis

Claims

claims

A method for blocking a spectacle lens (8) with a holding side (8.1) on a coupling side (9.1) of a block piece (9) by means of an adhesive

5 (10), in particular a plastic adhesive (10), wherein the block piece (9) is received in a block piece receptacle (2) and the spectacle lens (8) is movable relative to the block piece (9) along a lifting axis (H1),

characterized in that

a) the spectacle lens (8) is first placed with the holding side (8.1) on the adhesive-free coupling side (9.1) of the block piece (9) and is positioned relative to the coupling side (9.1) of the block piece (9);

15 b) the spectacle lens (8) together with the block piece receptacle (2) or the block piece (9) is aligned by tilting;

c) the spectacle lens (8) in this relative position to the block piece (9) by a positioning unit (3) and the tilting position or the block piece receptacle (2) with

20 is fixed to the block piece (9) or the spectacle lens (8) with respect to a tilting movement by a locking means (4);

d) the spectacle lens (8) is lifted by means of the positioning unit (3) in the set relative position;

e) the adhesive (10) is applied to the coupling side (9.1) of the block piece (9) and / or the holding side (8.1) of the spectacle lens (8);

f) the spectacle lens (8) by means of the positioning unit (3) in the fixed relative position to the block piece (9) and pressed against the adhesive (10) and at least indirectly via the adhesive (10) against the coupling side (9.1 ) of the block piece (9) is brought into abutment.

2. The method according to claim 1, characterized in that the positioning 35 purity (3) or an alignment element (3.2) in the direction of the lifting axis (Hl) against a reference side (8.2) of the spectacle lens (8) approached and thereby the spectacle lens (8 ) is aligned together with the block piece receptacle (2) by tilting about at least one tilting axis (Kl, K2). 0

3. The method according to claim 1 or 2, characterized

in that, with respect to the lifting axis (Hl) for the positioning unit (3), an end stop (E) or a stop or stop ring (3.1a) is defined or fixed in a position (PI) when the spectacle lens (8) in the relative position to the block piece (9) by the positioning unit (3) is fixed; and that the stop or a stop means (1.2) is adjusted so that a changed position (P2) of the end stop (E) of the positioning unit (3) in the direction of the lifting axis (Hl) and thus an increased distance (a) between the block piece receptacle (2 ) and the positioning unit (3) in the direction of the lifting axis (Hl) is achieved when the spectacle lens (8) by means of the positioning unit (3) moved up against the block piece (9) and against the adhesive (10) until reaching the end stop (E ) is pressed with the changed position (P2).

4. The method according to any one of claims 1 to 3, characterized in that the step a), b), c), d), e) and / or f) takes place manually.

5. The method according to any one of claims 1 to 4, characterized in that the block piece (9) on the coupling side (9.1) with markings (9.2) is provided and the spectacle lens (8) has spectacle lens markings (8.2), wherein for positioning the spectacle lens (8) the markings (9.2) and the lens markings (8.2) are aligned relative to each other.

6. The method according to any one of claims 1 to 5, characterized in that the coupling side (9.1) machined to adapt to the holding side (8.1) or at least substantially complementary training to the holding side (8.1) is or will, and / or the coupling side (9.1) is or will be at least substantially complementary, in particular with an accuracy of 0.5 mm, particularly preferably 0.2 mm or less, to the holding side (8.1).

7. A method for blocking a spectacle lens (8) having a holding side (8.1) on a coupling side (9.1) of a block piece (9) by means of an adhesive (10), in particular a plastic adhesive (10), wherein the block piece (9) in a block piece receptacle (2) is received and the spectacle lens (8) relative to the block piece (9) along a lifting axis (Hl) is movable, in particular according to one of the preceding claims,

characterized,

that, starting from the spectacle lens (8) initially placed directly on the block piece (9), a distance (a) is maintained or determined when the spectacle lens (8) is pressed against the block piece (9) with the adhesive (10) arranged therebetween.

8. blocking device (1) for blocking spectacle lenses (8) on block pieces (9),

with a block piece receptacle (2) arranged in particular on a base body (1.1) for a block piece (9) to be fastened to a spectacle lens (8) and

with a positioning unit (3) arranged in particular on the base body (1.1) for aligning and holding the spectacle lens (8) to be blocked,

wherein the block piece receptacle (2) or the block piece (9) and the positioning element (3) which can be fixed on the spectacle lens (8) can be moved relative to one another via a lifting axis (H1),

characterized,

in that the blocking device (1) is designed to carry out a method according to one of claims 1 to 7, and / or

in that the starting movement between the positioning unit (3) and the block piece receptacle (2) in the direction of the lifting axis (H1) is effected by at least one adjustable, in particular mechanical stop means (1.2) or an adjustable end stop (E) in at least two positions (PI, P2). limited or limited.

9. blocking device according to claim 8, characterized in that the stop means (1.2) stepped or continuously in several positions - preferably for adjusting the stop position - can be brought, in particular wherein the stop means (1.2) at least partially in the direction of the lifting axis (Hl) or transversely to the direction of the lifting axis (Hl) is adjustable.

10. Blocking device according to claim 8 or 9, characterized in that the stop means (1.2) has at least one end stop (E) forming abutment surface (f 1, f2).

11. Blocking device according to claim 8 to 10, characterized in that the stop means (1.2) as transversely to the direction of the lifting axis (Hl) adjustable stop plate with a plurality of stepped stop surfaces (fl, f2, f3) is formed.

12. Blocking device according to one of claims 8 to 11, characterized in that the stop means (1.2) as in the direction of the lifting axis (Hl) adjustable stop nut with stop surface (fl) or transverse to the direction of the lifting axis (Hl) adjustable Anschlagrampe with an abutment stop surface (fl) is formed.

13. Blocking device according to one of claims 8 to 12, characterized in that the positioning unit (3) on the spectacle lens (8) fixable by activating retaining element (3.1) and / or, separately separated, a against the spectacle lens (8) can be applied Aligning element (3.2), in particular wherein the holding element (3.1) can serve as an alignment.

14. Blocking device according to claim 13, characterized in that the holding element (3.1) has a suction cup (3.3) with a pressurizable with negative pressure inside (3.4).

15. Blocking device according to claim 14, characterized in that a lighting unit (3.6) is provided on or in the suction bell (3.3).

16. Blocking device according to one of claims 13 to 15, characterized in that the alignment element (3.2) has two or three in the direction of the lifting axis (Hl) acting contact pins (3.2a, 3.2b, 3.2c), the circumference to the stroke axis (Hl) and / or around the lifting axis (1) and / or a suction cup (3.3) are arranged around and against the spectacle lens (8) in the direction of the lifting axis (Hl) can be applied.

17. Blocking device according to one of claims 13 to 16, characterized in that the alignment element (3.2) has a parallel to the lifting axis (Hl) extending translation axis (Tl), wherein a coupling (3.7) is provided, by means of the alignment element (3.2) and the holding element (3.1) can be coupled, wherein in the coupled state, the movement of the alignment element (3.2) along the lifting axis (Hl) and the movement of the holding element (3.1) along the translation axis (Tl) are synchronized and in the uncoupled state, the translational movement of the holding element (3.1) in the direction of the translation axis (Tl) can take place independently of the lifting movement of the alignment element (3.2) in the direction of the lifting axis (Hl).

18. blocking device according to claim 17, characterized in that the lifting axis (Hl) and / or the coupling (3.7) are manually operated.

19. Blocking device according to one of claims 8 to 18, characterized in that the block piece receptacle (2) has two right angles to each other and at right angles to the lifting axis (Hl) aligned tilting axes (Kl), (K2) and to both tilt axes (Kl, K2) manually freely pivotable and can be fixed in a desired position.

20. blocking device according to one of claims 8 to 19, characterized in that the coupling side (9.1) at least substantially complementary, in particular with an accuracy of 0.5 mm, more preferably of 0.2 mm or less, to the holding side (8.1) is trained.