WO1999025521A1 - Special pliers - Google Patents

Abstract

The invention relates to special pliers for optical elements, especially eyeglass elements. The inventive special pliers are characterized in that they contain a device enabling two clamping jaws (1a, 1b) to be opened and closed in a parallel manner. A fixing device (3, 4) is provided on each clamping jaw for the relevant optical components. The fact that the clamping jaws can close in a parallel manner means that no force components are produced which would otherwise result in the displacement of said optical components. By including the holding devices (3, 4) on the clamping jaws (1a, 1b), the optical components can be fixed in an optimal (damage-free) manner. The special pliers are used as a clamping device for optimum holding of at least two optical components that are to be machined in a precise position, whereby the first optical component is preferably an eyeglass. An eyeglass former is provided as a second component for precisely positioned drilling of an eyeglass (drilled spectacles). The eyeglass former is used as a drilling jig.

Description

 Special pliers

The present invention relates generally to a special pair of pliers, which is created especially for opticians and which is designed according to the preamble of claim 1. In addition, the use of these special pliers is also claimed.

Various pliers for holding workpieces are generally known in the prior art. In the field of optics, a. a so-called glass rotating pliers are common, the two jaws of which are moved by an ordinary locking mechanism. This known glass tongs is used to hold an eyeglass lens, the two clamping jaws each having a rubber pad to protect the eyeglass lens from damage. Such a glass tongs is not suitable for holding aligned several optical components at the same time, since when the clamping jaws close, they move on an arcuate path and thus a force component is generated which displaces the multiple components against one another.

Special pliers, which have a device for closing the jaws essentially in parallel, are also known. However, these parallel-closing special pliers cannot be used for optical components, since the known clamping jaws would damage and / or destroy the optical components.

Different solutions for holding workpieces or components by means of pliers are thus known from the prior art, but there is no special pliers for optical ones Components known that would allow an aligned holding of optical components.

In contrast, the object of the invention is to create a special pair of pliers which allows optical components to be held in place, with no displacement of the optical components when the clamping jaws are closed.

The above-mentioned object is achieved by means of special pliers which have the features according to the characterizing part of patent claim 1.

According to the invention, the special pliers are characterized in that they have a device for opening and closing two clamping jaws in parallel, a holding device for the optical components being provided on each clamping jaw.

This ensures that the parallel closing of the clamping jaws does not generate any force component which would result in the optical components being displaced, as is possible by the provision of the holding devices on the clamping jaws for optimal fixing of the optical components.

Advantageous further developments of the special pliers are specified in the subclaims.

According to claim 2, a locking device is provided in order to fix the jaws at a desired distance from each other. This also includes the completely closed state of the pliers, the optical components then being securely held between the clamping jaws.

The holding devices for the optical components are preferably arranged such that they can be displaced on the clamping jaws in order to enable adjustment for optical components of different sizes. Furthermore, according to an advantageous embodiment, a positioning device is provided which allows the optical components to be held to be aligned.

The special pliers according to the invention are preferably created for optical workpieces or components, such as for holding an eyeglass lens, a shaped disc, etc.

For holding an eyeglass lens, the holding device preferably comprises a rubber holder and a rubber pad in order to obtain a soft contact surface, while the holding device for a shaped disk comprises a pin holder and preferably two pins which come into engagement with the shaped disk.

The special pliers according to the invention are intended for use as a clamping device for holding in position at least two optical components to be machined, the first optical component preferably being a spectacle lens.

For precise drilling of a spectacle lens (drilling glasses), a shaped disk is provided as a second component according to claim 9. The shaped disk serves as a drilling template, as described in utility model G 297 15 744 (same applicant).

A plurality of spectacle lenses can also be held at the same time, as claimed in claim 11, so that at least one hole can be made in the spectacle lens or in the spectacle lenses and / or the contour can be ground.

According to claim 13, the special pliers can also have a flat support surface on a clamping jaw for support or clamping on a work table or drilling table. The first jaw with the flat contact surface is then fixed there and the second jaw is also for this case shifted by a mechanism that closes and opens in parallel in order to be able to clamp the optical workpieces or components. In this embodiment, this mechanism mentioned above does not necessarily have to be formed by two handles, but can also be provided by a device having the same effect.

The scope of protection results from the associated patent claims, several embodiments being described below for a better understanding of the present invention.

In the drawings:

Fig. 1 is a schematic view of an inventive

Special pliers without functional components;

Figure 2 is a schematic partial sectional view of the special pliers according to the invention with functional components.

3 shows an enlarged side view of a clamping jaw of the special pliers according to the invention;

Fig. 4 is an enlarged view from the front, with the special pliers holding a shaped disk and a spectacle lens;

5a shows a view of a clamping jaw from above, according to another embodiment;

5b shows a view of a further clamping jaw from above;

6 shows a schematic plan view of a positioning device on the special pliers according to the invention; and

Fig. 7 is a schematic partial view from above, wherein a shaped washer, a rubber bracket and the upper jaw of the special pliers are shown. The illustration in FIG. 1 shows a section of a special pliers 1 according to the invention with two handles 2a and 2b, which are connected to two clamping jaws 1a and 1b via a lever and joint mechanism. If the two handles 2a and 2b are moved towards one another in the direction of the arrows A, the two clamping jaws la and lb close with a movement which is essentially rectilinear, ie that the two surfaces of the clamping jaws la and lb, the opposed to moving parallel to each other.

The special pliers with the functional components which are advantageous for holding the optical components are shown schematically in FIG. The holding devices 3 and 4, which are each provided on a clamping jaw la and lb, are described with reference to an embodiment of the pliers, which is preferably used for drilling a spectacle lens (reference number 10 in FIG. 4).

The pliers, which close and open in parallel, comprise a mechanism which essentially consists of a bolt 8a and 8b, a screw connection 7a and 7b and a swivel joint 6. Each handle 2a or 2b of the pliers 1 is connected to each of the two clamping jaws la or lb via these rotatable connecting sections.

The handle 2b arranged at the top in FIGS. 1 and 2 is rotatably connected to the clamping jaw 1b at the distal end by means of the screw connection 7b. The handle 2a is accordingly rotatably connected to the clamping jaw la via the screw connection 7a. The two handles 2a and 2b are pivotally connected to one another by means of the swivel joint 6. In a central section of the handles 2a and 2b, the bolts 8a and 8b are provided, which run through grooves 9a and 9b in the clamping jaws la and lb. The bolts 8a and 8b can be seen in FIGS. 1 and 2 with their end faces and have a cylindrical shape. The bolts 8a and 8b are arranged in the grooves 9a and 9b with little play. When the handles 2a and 2b are moved in the direction of the arrows A, the two handles 2a and 2b rotate about the swivel joint 6. As a result of the fixing of the clamping jaws la and lb on the right-hand end section (in the figures) by means of the grooves 9a and 9b on the bolts 8a and 8b rotate the clamping jaws la and lb in the area of the screw connections 7a and 7b relative to the handles 2a and 2b. The straight-line guidance of the bolts 8a and 8b in the grooves 9a and 9b results in an overall straight-line movement of the clamping jaws la and lb.

The holding device 3 consists in this embodiment of a rubber holder 3a and a rubber pad 3b. In this embodiment, both components 3a and 3b are disc-shaped. The rubber bracket 3a is screwed to the upper jaw la, while the rubber pad 3b is glued to the rubber bracket 3a.

The holding device 4 consists of a pin holder 4a which is fastened by means of a screw connection to the lower clamping jaw 1b and preferably two pins 4b which are fixed by the pin holder 4a.

In addition, a locking device is shown in Figure 2, which consists of a threaded rod 5 in this embodiment, which is screwed firmly into the lower jaw 1b in a blind bore with an internal thread, and this threaded rod 5 through a through hole in the upper jaw la runs through. By means of a screw nut, not shown, preferably a wing nut, which is screwed onto the threaded rod 5 from above, the position of the upper jaw la, relative to the lower jaw lb, can be determined and a desired distance between the two jaws la and lb can be fixed.

FIG. 3 shows a further embodiment of a clamping jaw 11a, the groove 19 being provided for receiving the bolt 8a and a semicircular cutout being provided on the underside, which for receiving a Nes hinge pin of the swivel 6 is used when the special pliers I is almost completely closed. The gradation on the left side of the jaw 11a serves to create a space for the holding devices 3 and 4. The jaw 11a shown in FIG. 3 can of course be used for both jaws.

FIG. 4 shows special pliers (only partially, but shown enlarged) from the front. The two clamping jaws la and lb are in the closed state, so that two “optically optic” workpieces, namely a spectacle lens 10 and a shaped disk 12 are held firmly between the clamping jaws la and lb. From above, the clamping jaw la presses onto the spectacle lens 10 by means of the rubber holder 3a and the rubber pad 3b, which is preferably concave, while from below the clamping jaw lb presses through the pin holder 4a, which grips around the clamping jaw lb in a U-shape, and the pins 4b on the shaped disk 12. Since the shaped disk 12 consists of a soft, flexible material, the shaped disk 12 lies flat against the relatively rigid spectacle lens 10 and assumes its curvature. The two pins 4b, which preferably have a distance and diameter standardized according to DIN, engage in two bores in the shaped disk 12. For special pliers and shaped washers to be used outside of Germany, other distances and diameters of the pins 4b can also be provided.

After the two components, namely the spectacle lens 10 and the shaped lens 12, have been brought into positional correspondence with one another in this way and are fixed to one another by the clamping jaws 1a and 1b of the special pliers 1, bores 13 can be made in the spectacle lens 10. As a result of the fact that no displacement of the two components to be held occurs due to the parallel closing of the clamping jaws la and lb, a very precise relative positioning of the two components is possible. The bores 13 can be drilled into the spectacle lens 10 freehand using a commercially available hand drill. Sleeves 17 are preferably used (see Figure 7), which are screwed into the form disk 12, as a guide for a drill (see also the utility model mentioned above).

In the two figures 5a and 5b, further embodiments of the clamping jaws according to the invention are shown schematically.

FIG. 5a shows a clamping jaw 21 which is one

Has slot 18a. The slot 18a serves to receive a screw bolt (not shown), which is used to fix the holding devices 3 or 4. The holding devices

3 and 4 are then also displaceable by means of the screw bolt which can be displaced in the slot 18a and can be adapted in position for various purposes. The holding device 3 or 4 can be screwed onto the screw bolt by means of a screw nut which is arranged on the side of the clamping jaw 21 opposite the holding device 3 or 4.

FIG. 5b shows a clamping jaw 31 with a tapering slot 18b. This slot 18b also serves to receive the holding device 3, which is the foot 23 of an adhesive suction device, for example. In this case, the cylindrical foot 23 of the suction cup is inserted into the slot 18b until it jams. A spectacle lens which is held in a decentered manner by the adhesive suction device (not shown) can thus be attached to the clamping jaw 31. Different diameters of feet from different glue suction devices can be held in the slot 18b. Due to the displaceability of the second holding device 4, the corresponding positioning of the two holding devices 3 and

Reach 4.

A further improvement in handling results from an embodiment which comprises a positioning device as shown in FIG. 6. This positioning device comprises a sleeve 14, which is preferably arranged on the threaded rod 5 in the region of the lower jaw la. The sleeve 14 is freely rotatable about the threaded rod 5. For example, two holders 15 are provided on one side of the sleeve 14, on which two cylindrical contact sections 16 are fastened. These cylindrical contact sections 16 come into linear contact with their circumferential surfaces with the shaped disk 12 when it is plugged onto the pin 4b and is moved backwards in the direction of the threaded rod 5 (to the right in FIG. 2) by means of the displaceable pin holder 4a .

Since the sleeve 14 can rotate freely on the threaded rod 5 and the shaped disk 12 is aligned by the pins 4b, an engagement state is achieved, as is shown in FIG. 6. The contact sections 16 have an axial extent which is significantly longer than the thickness of the shaped disk 12, so that they protrude upward above the shaped disk 12. If an eyeglass lens 10 is now placed on the shaped disk 12 (as shown in FIG. 4), the back of the eyeglass lens 10 can also abut the alignment sections 16 and be aligned with them so that the shaped disk 12 and the Eyeglass lens 10 are aligned by means of the contact sections 16 and have a rear stop.

Another embodiment of the special pliers 1 comprises a rubber holder 3a and a rubber pad 3b, both of which preferably have two diametrically opposite recesses 22 which are U-shaped. FIG. 7 shows a shaped disk 12 together with the spectacle lens 10 placed on it, these two parts being moved in the direction of the arrow B in order to ensure the correct alignment of the spectacle lens 10. The cutouts 22 enable the axial position of the spectacle lens 10 to be checked visually.

The special pliers 1 can comprise a known elastic device, for example a coil or tongue spring (not shown), which applies a bias in the opening direction to the handles 2a and 2b. In a further embodiment, not shown in the drawing, the special pliers can also have a flat support surface on a first clamping jaw for support or clamping on a work table, drilling table or milling table. The first clamping jaw with the flat support surface is then fixed on the work table and the second clamping jaw is also moved from top to bottom and vice versa in this case by a parallel closing and opening mechanism in order to be able to clamp the optical workpieces or components. In this embodiment, the parallel closing and opening mechanism does not necessarily have to be formed by two handles, but can also be provided by an equivalent device, for example a spindle drive.

A special pair of pliers for optical, especially ophthalmic

Components are described. According to the invention, this special pliers is characterized in that it has a device for opening and closing two clamping jaws in parallel, a holding device for the optical components being provided on each clamping jaw. This ensures that the parallel closing of the clamping jaws does not generate any force component that would result in the optical components being displaced, just as the provision of the holding devices on the clamping jaws enables an optimal (damage-free) fixing of the optical components. The special pliers according to the invention are intended for use as a clamping device for holding in position at least two optical components to be machined, the first optical component preferably being a spectacle lens. A shaped disc is provided as the second component for drilling a spectacle lens (drilling glasses) with precise position. The shaped disk serves as a drilling template.

Claims

claims 1. Special pliers with a device for parallel opening and closing of two clamping jaws (la, lb; 11a; 21; 31), characterized in that on each clamping jaw (la, lb; 11a; 21; 31) a holding device (3, 4 ) is provided for optical components (10, 12). 2. Special pliers according to claim 1, characterized in that a locking device (5) is provided in order to fix the clamping jaws (la, lb; 11a; 21; 31) at a desired distance from one another. 3. Special pliers according to claim 1 or 2, characterized in that the holding devices (3, 4) on the clamping jaws (la, lb; 11a; 21; 31) are arranged displaceably. 4. Special pliers according to one of claims 1 to 3, character- ized in that a positioning device (14, 15, 16) is provided, which allows an alignment of the optical components to be held (10, 12). 5. Special pliers according to one of claims 1 to 4, characterized in that the optical components comprise optical components, such as an eyeglass lens (10), a shaped disc (12) etc. 6. Special pliers according to one of claims 1 to 5, character- ized in that a holding device (3) for a spectacle lens (10) comprises a rubber holder (3a) and a rubber pad (3b). 7. Special pliers according to one of claims 1 to 6, characterized in that a holding device (4) for a shaped disc (12) comprises a pin holder (4a) and preferably two pins (4b). 8. Special pliers according to one of claims 4 to 7, characterized in that the positioning device (14, 15, 16) is arranged on the locking device (5). 9. Use of the special pliers according to one of claims 1 to 8 as a clamping device for precisely holding onto at least two optical components to be machined, the first component being a spectacle lens (10). 10. Use of the special pliers according to claim 9, wherein the second component is a shaped disc (12). 11. Use of the special pliers according to claim 9, wherein the second component is a second lens. 12. Use of the special pliers according to one of claims 9 to 12, wherein in the spectacle lens (10) at least one hole (13) is introduced and / or the contour of the spectacle lens (10) is ground. 13. Special pliers according to one of claims 1 to 8, characterized in that the underside of a clamping jaw (lb) is flat, so that a support or clamping surface is provided for a work table or the like.